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See detailPoetics of Digital Comics
Crucifix, Benoît ULiege; Dozo, Björn-Olav ULiege; Rommens, Aarnoud

in The Comics Grid: Journal of Comics Scholarship (2017)

This special collection follows up on the transdisciplinary conference Poetics of the Algorithm held at the University of Liège (Belgium) in June 2016. Narrative today is undergoing a radical change in ... [more ▼]

This special collection follows up on the transdisciplinary conference Poetics of the Algorithm held at the University of Liège (Belgium) in June 2016. Narrative today is undergoing a radical change in its ‘source code’ as new technologies are changing the way texts are produced, distributed, viewed and read. Even though comics have originally been resistant to a sweeping digital translation, weary of a technological utopianism that did not bode well for its own specificities, cartoonists have increasingly adapted to this new media ecology, using it to reinvent their approach to comics making. A poetics of digital comics would aim at mapping out how comics respond to the deep technological change of the digital in complex ways, avoiding the pitfall of a new vs. old dichotomy and thus accounting for both its innovative forays into digital creation as well as its paradoxes, resistances, residues and returns. By bringing Francophone voices into English, this collection, under the editorial direction of Benoît Crucifix, Björn-Olav Dozo, Aarnoud Rommens and Ernesto Priego for The Comics Grid: Journal of Comics Scholarship, seeks to encourage international scholarship spanning from the cutting-edge of a ‘French comics theory’ that, in recent years, has paid increasing attention to digital comics. [less ▲]

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See detailDevelopment of nuclear SNP markers for the timber tracking of the African tree species Sapelli, Entandrophragma cylindricum
Blanc-Jolivet, Céline; Kersten, Birgit; Bourland, Nils et al

in Conservation Genetics Resources (2017)

We describe the development of new nuclear SNP markers for the genetic timber tracking of the geographical origin of Sapelli, Entandrophragma cylindricum (Meliaceae). Restriction associated DNA sequencing ... [more ▼]

We describe the development of new nuclear SNP markers for the genetic timber tracking of the geographical origin of Sapelli, Entandrophragma cylindricum (Meliaceae). Restriction associated DNA sequencing (RADseq) of two reference individuals yielded 1131 putative SNPs. Among those, 131 were selected to design four MassARRAY multiplexes and screened at 178 individuals. Seventy-two loci were selected for further use in genetic tracking. [less ▲]

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See detailEjection Fraction May Not Reflect Contractility: Example in Veno-Arterial Extracorporeal Membrane Oxygenation for Heart Failure
MORIMONT, Philippe ULiege

in ASAIO Journal (American Society for Artificial Internal Organs : 1992) (2017)

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See detailContribution of the β-glucosidase BglC to the Onset of the Pathogenic Lifestyle of Streptomyces scabies
Jourdan, Samuel; Francis, Isolde M.; Deflandre, Benoit et al

in bioRxiv (2017)

Common scab disease on root and tuber plants is caused by Streptomyces scabies and related species which use the cellulose synthase inhibitor thaxtomin A as main phytotoxin. Thaxtomin production is ... [more ▼]

Common scab disease on root and tuber plants is caused by Streptomyces scabies and related species which use the cellulose synthase inhibitor thaxtomin A as main phytotoxin. Thaxtomin production is primarily triggered by the import of cello-oligosaccharides. Once inside the cell, the fate of the cello-oligosaccharides is dichotomized into i) fueling glycolysis with glucose for the saprophytic lifestyle through the action of β-glucosidase(s) (BG), and ii) eliciting the pathogenic lifestyle by inhibiting the CebR-mediated transcriptional repression of thaxtomin biosynthetic genes. Here we investigated the role of scab57721 encoding a putative BG (BglC) in the onset of the pathogenicity of S. scabies. Enzymatic assays showed that BglC was able to release glucose from cellobiose, cellotriose and all other cello-oligosaccharides tested. Its inactivation resulted in a phenotype opposite to what was expected as we monitored reduced production of thaxtomin when the mutant was cultivated on media containing cello-oligosaccharides as unique carbon source. This unexpected phenotype could be attributed to the highly increased activity of alternative intracellular BGs, probably as a compensation of bglC inactivation, which then prevented cellobiose and cellotriose accumulation to reduce the activity of CebR. In contrast, when the bglC null mutant was cultivated on media devoid of cello-oligosaccharides it instead constitutively produced thaxtomin. This observed hypervirulent phenotype does not fit with the proposed model of the cello-oligosaccharide-mediated induction of thaxtomin production and suggests that the role of BglC in the route to the pathogenic lifestyle of S. scabies is more complex than currently presented. [less ▲]

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See detailCox2A/Cox2B subunit interaction in Polytomella sp. cytochrome c oxidase: role of the Cox2B subunit extension
Jiménez-Suárez, Alejandra; Vázquez-Acevedo, Miriam; Miranda Astudillo, Héctor Vicente ULiege et al

in Journal of Bioenergetics and Biomembranes (2017), 49(6), 453-461

Subunit II of cytochrome c oxidase (Cox2) is usually encoded in the mitochondrial genome, synthesized in the organelle, inserted co-translationally into the inner mitochondrial membrane, and assembled ... [more ▼]

Subunit II of cytochrome c oxidase (Cox2) is usually encoded in the mitochondrial genome, synthesized in the organelle, inserted co-translationally into the inner mitochondrial membrane, and assembled into the respiratory complex. In chlorophycean algae however, the cox2 gene was split into the cox2a and cox2b genes, and in some algal species like Chlamydomonas reinhardtii and Polytomella sp. both fragmented genes migrated to the nucleus. The corresponding Cox2A and Cox2B subunits are imported into mitochondria forming a heterodimeric Cox2 subunit. When comparing the sequences of chlorophycean Cox2Aand Cox2B proteins with orthodox Cox2 subunits, a C-terminal extension in Cox2A and an N-terminal extension in Cox2B were identified. It was proposed that these extensions favor the Cox2A/Cox2B interaction. In vitro studies carried out in this work suggest that the removal of the Cox2B extension only partially affects binding of Cox2B to Cox2A.We conclude that this extension is dispensable, but when present it weakly reinforces the Cox2A/Cox2B interaction. [less ▲]

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See detailPlantes pesticides et protection des cultures maraichères en Afrique de l’Ouest (synthèse bibliographique)
Yarou, Boni Barthélémy ULiege; Silvie, Pierre; Assogba Komlan, Françoise et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2017), 21(4), 288-304

Introduction. Les cultures maraichères occupent une place importante pour l’alimentation humaine et contribuent significativement aux revenus des familles en Afrique de l’Ouest, mais leur production est ... [more ▼]

Introduction. Les cultures maraichères occupent une place importante pour l’alimentation humaine et contribuent significativement aux revenus des familles en Afrique de l’Ouest, mais leur production est confrontée à une pression des bioagresseurs qui limite leur productivité. Littérature. Cette revue, basée sur des publications scientifiques, a pour objectif d’évaluer le potentiel des plantes pesticides comme alternative à l’usage des pesticides de synthèse pour lutter contre les bioagresseurs des cultures maraichères en Afrique de l’Ouest. Elle montre que le principal moyen actuel pour combattre ces bioagresseurs repose essentiellement sur les pesticides de synthèse. Cependant, compte tenu de leur nocivité sur l’homme et l’environnement, en plus de la sélection de populations résistantes chez les bioagresseurs, la recherche de solutions alternatives s’impose. Les plantes pesticides se présentent comme une alternative prometteuse dans le contexte ouest-africain. En effet, diverses espèces de plantes pesticides peuvent être utilisées comme extraits de plantes ou en association avec d’autres cultures pour le contrôle des bioagresseurs. Celles-ci sont présentées dans le présent article de synthèse. Conclusions. Les plantes pesticides peuvent être une alternative prometteuse pour la gestion des bioagresseurs des cultures maraichères. Cependant, la plupart d’entre elles ne sont pas cultivées. Explorer les capacités biocides de plantes d’intérêt comme le genre Ocimum, connu pour ses usages thérapeutique, médicinal et alimentaire pourrait être intéressant pour le producteur. Toutefois, les populations doivent être sensibilisées sur les avantages à long terme des produits traités avec les pesticides à base de plantes pour faciliter leur utilisation. [less ▲]

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See detailLa communication scientifique directe vers un public élargi. L’actualité sociale traitée par des chercheurs dans les carnets de recherche Hypothèses
Mayeur, Ingrid ULiege

in Revue Française des Sciences de l'Information et de la Communication (2017), 11

This contribution aims to examine a social mediation allowed by the open access, which is imparting knowledge in Social Sciences and Humanities (thereafter SSH) through a broader public. I will consider ... [more ▼]

This contribution aims to examine a social mediation allowed by the open access, which is imparting knowledge in Social Sciences and Humanities (thereafter SSH) through a broader public. I will consider the platform OpenEdition (and specifically Hypothèses that concerns academic blogging) as a ground of investigation. The matter will be a specific way to impart knowledge, which is the treatment of the actuality by researchers through their reading grids in SSH. In the corpus analysis, I will stress the appropriation modes of the device by the researchers that comment the actuality, the expected audience and practices that the texts suggest, and the discursive processes that are used. I also will question how “direct” such scientific communication is on an academic blog published on a platform in open access. [less ▲]

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See detailStudies on convective cooling of cryogenic fluids towards superconducting applications
Satpathy, Kamalakanta ULiege; Dubois, Charles; Duchesne, Alexis et al

in WIT Transactions on Engineering Sciences (2017), 118

To understand the cooling aspect through natural convection in a cryogenic fluid interacting with a constant heat source, numerical simulations are carried out in a parallelepiped enclosure. The 3D form ... [more ▼]

To understand the cooling aspect through natural convection in a cryogenic fluid interacting with a constant heat source, numerical simulations are carried out in a parallelepiped enclosure. The 3D form of N-S equations is solved to obtain the detailed flow features through path line profiles, isotherm contours and velocity vectors. The effect of heater aspect ratio (x/L) on the rate of heat transfer is studied in terms of the average Nusselt number (Nuave). The results indicate that effective heat transfer enhancement occurs for a small heater length, resulting in an efficient cooling. Increasing the heater length will favor heat transfer through conduction over convection. The maximum temperature difference across the fluid and the velocity magnitude are found to decrease with heater length. 3D and 2D results are in agreement for short heater lengths, but vary for higher heater lengths, presumably due to the essential effect of the heater width. Further analysis on different types of coolant reveals a constant correlation between Nuave and the Rayleigh number (Ra), with Nuave ~ Ra^0.374. Benchmark validation for natural convection in a square enclosure is found to be satisfactory against the reported results. [less ▲]

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See detailSimple LC Isocratic Methods Development, Validation, and Application in the Analysis of Poor Quality Antimalarial Medicines
Habyalimana, Védaste ULiege; Mbinze Kindenge, Jéremie; Yemoa Loconon, Achille et al

in American Journal of Analytical Chemistry (2017), 8

Liquid chromatographic methods in isocratic mode for the analysis of poor quality medicines are privileged due to their simplicity and facility in methods development. They are generally fast; do not need ... [more ▼]

Liquid chromatographic methods in isocratic mode for the analysis of poor quality medicines are privileged due to their simplicity and facility in methods development. They are generally fast; do not need to be re-equilibrated between sample injections; have larger flexibility with acceptable changes on different column dimensions; and are applicable to LC systems equipped with simple or high developed pumps. In this study, we focused on developing simple isocratic methods using classical mobile phase composed by methanol and ammonium formate buffer for the analysis of most common antimalarial medicines marketed in malaria endemic countries and susceptible of being counterfeit/falsified, substandard and degraded. The selected medicines were quinine and related cinchona alkaloids in tablets and injectable forms; artemether/ lumefantrine tablets; and artemisinin compounds (arteether, artemether, and artesunate) in injectable forms. The current methods were developed thanks to simple methodological approach consisting in sequential isocratic runs through adjustment or adaptation of existing methods to obtain optimal analytical conditions without complex design of experiments that might be long and costly. Then, the new methods presented shorter analysis time; allowed increase of sample analysis throughput; and obviously consumed little mobile phase solvents on classical analytical columns: 50 - 250 mm of length (L), 4.6 mm of internal diameter (I.D.), and 3.5 - 5.0 μm of particle size (dp). [less ▲]

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See detailDifferential impact of drugs on the outcome of ETV6-RUNX1 positive childhood B-cell precursor acute lymphoblastic leukaemia: results of the EORTC CLG 58881 and 58951 trials
Piette, Caroline ULiege; Suciu, S; Clappier, E et al

in Leukemia : Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K (2017)

In childhood B-cell precursor acute lymphoblastic leukaemias (BCP-ALL), the presence of an ETV6-RUNX1 fusion transcript defines one of the most prevalent genetic subgroups, together with the high ... [more ▼]

In childhood B-cell precursor acute lymphoblastic leukaemias (BCP-ALL), the presence of an ETV6-RUNX1 fusion transcript defines one of the most prevalent genetic subgroups, together with the high hyperdiploidy (HeH) ALL. Although ETV6-RUNX1pos ALLs are associated with favourable outcome, their proper treatment strategies remain debatable, some groups suggesting crucial impact of upfront intensive treatment while others favour low-intensity antimetabolite-based therapy. [less ▲]

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See detailClostridium difficile in beef cattle farms, farmers and their environment: assessing the spread of the bacterium
Rodriguez Diaz, Cristina ULiege; Hakimi, Djalal-Eddine; Vanleyssem, Raphael et al

in Veterinary Microbiology (2017), 2010

n recent years, several studies have described the presence of Clostridium difficile in healthy and diarrhoeic farm and domestic animals. In pigs and cattle, the isolation of some PCR-ribotypes associated ... [more ▼]

n recent years, several studies have described the presence of Clostridium difficile in healthy and diarrhoeic farm and domestic animals. In pigs and cattle, the isolation of some PCR-ribotypes associated with human infection, especially PCR-ribotypes 014 and 078, has led us to hypothesize about the zoonotic transmission of C. difficile infections. If these animals are reservoirs of C. difficile, farmers in close contact with their animals are particularly at risk of acquiring and spreading the bacterium. This study investigates the presence of C. difficile in closely associated populations, beef cattle and farmers, as well as in the animal feed, manure and dust in five different farms in Belgium. C. difficile was isolated from calves and cattle with a prevalence varying between 5.5% and 11.3%. Furthermore, all of the isolates were toxigenic. An important age and breed effect was observed in the colonization of C. difficile. For age, there was a higher probability of colonization in calves of less than 6 months in age than in cattle over 11 months of age. For the type of breed a higher prevalence of the bacterium was detected in the Limousin breed than in the Belgian Bleu breed. By contrast, none of the human and animal feed samples tested positive for C. difficile. The results obtained indicate a persistent animal reservoir of C. difficile, but an indirect dissemination to humans, probably via the environment. [less ▲]

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See detailDenitrification, anaerobic ammonium oxidation, and dissimilatory nitrate reduction to ammonium in an East African Great Lake (Lake Kivu)
Roland, Fleur ULiege; Darchambeau, François; Borges, Alberto ULiege et al

in Limnology and Oceanography (2017)

We investigated anaerobic nitrogen (N) cycling in the water column of Lake Kivu, a deep meromictic tropical lake in East Africa. Data were collected at one station in the Northern Basin and one in the ... [more ▼]

We investigated anaerobic nitrogen (N) cycling in the water column of Lake Kivu, a deep meromictic tropical lake in East Africa. Data were collected at one station in the Northern Basin and one in the Southern Basin, during two sampling campaigns (June 2011—dry season, and February 2012—rainy season). Short-term incubations of sulfide-free water with 15N-labeled substrates revealed high potential denitrification and dissimilatory nitrate reduction to ammonium (DNRA) rates (up to 350 and 36 nmol N produced L−1 h−1, respectively), while anaerobic ammonium oxidation (anammox) was lower (up to 3.3 nmol N produced L−1 h−1). However, anammox rates were 15 nmol N produced L−1 h−1 when 15 NH4+ was added at depths where NH4+ concentrations were very low (< 1 μmol L−1). With the addition of 5 μmol L−1 of 15 NO3− and 10 μmol L−1 of H2S, denitrification and anammox were stimulated in the Northern Basin, while the increase of DNRA rates was less notable. In the Southern Basin, the addition of H2S decreased denitrification rates, probably because of competition with DNRA, which increased, while no effect was observed on anammox. This study puts into evidence the co-occurrence of denitrification, anammox and DNRA, for the first time in a great tropical lake, and underlines the spatial heterogeneity of these processes. Contrary to numerous reports in literature, we show that anammox can significantly occur in presence of H2S, suggesting that the contribution of anammox in the N cycle may be underestimated. [less ▲]

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See detailEffects of wildflower strips and an adjacent forest on aphids and their natural enemies in a pea field
Hatt, Séverin ULiege; Mouchon, Pierre; Chevalier Mendes Lopes, Thomas ULiege et al

in Insects (2017), 8(3), 99

Landscape diversification is a key element for the development of sustainable agriculture. This study explores whether the implementation of habitats for pest natural enemies enhances conservation ... [more ▼]

Landscape diversification is a key element for the development of sustainable agriculture. This study explores whether the implementation of habitats for pest natural enemies enhances conservation biological control in an adjacent field. In the present study conducted in Gembloux (Belgium) in 2016, the effect of two different habitats (wildflower strips and a forest) and aphid abundance on the density of aphid natural enemies, mummified aphids and parasitism on pea plants was assessed through visual observations. The effect of the habitats on aphids was also evaluated. The habitats but not aphid density significantly affected hoverfly larvae, which were more abundant adjacent to wildflower strips than to the forest. The contrary was observed for ladybeetle adults, which were positively related with aphids but not affected by the adjacent habitats. The abundance of mummies and the parasitism rate were significantly affected by both the habitats and aphid density. They were both significantly enhanced adjacent to wildflower strips compared to the forest, but the total parasitism rate was low (<1%), questioning whether parasitoids could significantly control aphids on the pea crop. As for the aphids, their abundance was not significantly affected by the adjacent habitats. These results are discussed with respect to the potential of these habitats to provide overwintering sites and food resources for natural enemies, and thereby enhance conservation biological control. [less ▲]

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See detailEffects of cyproterone acetate and vertically-transmitted microsporidia parasite on Gammarus pulex sperm production
Gismondi, Eric ULiege; Fivet, Adeline ULiege; Joaquim-Justo, Célia ULiege

in Environmental Science and Pollution Research (2017), 24(29), 2341723421

Endocrine disruption compounds (EDCs) and parasitism can both interfere with the reproduction process of organisms. The amphipod Gammarus pulex is the host of the vertically transmitted microsporidia ... [more ▼]

Endocrine disruption compounds (EDCs) and parasitism can both interfere with the reproduction process of organisms. The amphipod Gammarus pulex is the host of the vertically transmitted microsporidia Dictyocoela duebenum, and this work was devoted to the investigation of the effect of an exposure to the anti-androgen compound, cyproterone acetate (CPA), and/or of the presence of D. duebenum on the spermatozoa production and length. Significant reduction of the spermatozoa production was observed when G. pulex males were uninfected and exposed to CPA. There also appeared a lower number of spermatozoa when D. duebenum infects G. pulex, whatever the exposure condition. Moreover, we highlighted that CPA has no effect on spermatozoa production when males are infected by D. duebenum, and no treatment has impacted the spermatozoa length. Our results suggest CPA and D. duebenum could impact the endocrine system of G. pulex and especially processes close to the spermatozoa production (e.g., androgenic gland, androgen gland hormone released, gonad-inhibiting hormone synthesized by X-organ). However, as no mechanism of action was highlighted, further testing need to be performed to improve the understanding of their impacts. Finally, results confirm that vertically transmitted microsporidia could be a confounding factor in the endocrine disruption assessments in Gammaridae. [less ▲]

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See detailSimultaneous detection of Wheat dwarf virus, northern cereal mosaic virus, barley yellow striate mosaic virus and rice black-streaked dwarf virus in wheat by multiplex RT-PCR
Zhang, Peipei; Liu, Yan; Liu, Wenwen et al

in Journal of Virological Methods (2017), 249

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See detailSerial order working memory and numerical ordinal processing share common processes and predict arithmetic abilities
Attout, Lucie ULiege; Majerus, Steve ULiege

in British Journal of Developmental Psychology (2017)

Recent studies have demonstrated that both ordinal number processing and serial order working memory (WM) abilities predict calculation achievement. This raises the question of shared ordinal processes ... [more ▼]

Recent studies have demonstrated that both ordinal number processing and serial order working memory (WM) abilities predict calculation achievement. This raises the question of shared ordinal processes operating in both numerical and WM domains. We explored this question by assessing the interrelations between numerical ordinal, serial order WM, and arithmetic abilities in 102 7- to 9-year-old children. We replicated previous studies showing that ordinal numerical judgement and serial order WM predict arithmetic abilities. Furthermore, we showed that ordinal numerical judgement abilities predict arithmetic abilities after controlling for serial order WM abilities while the relationship between serial order WM and arithmetic abilities was mediated by numerical ordinal judgement performance. We discuss these results in the light of recent theoretical frameworks considering that numerical ordinal codes support the coding of order information in verbal WM. [less ▲]

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See detailExtracting oscillating components from nonstationary time series: A wavelet-induced method
Deliège, Adrien ULiege; Nicolay, Samuel ULiege

in Physical Review. E : Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics (2017), 96

This paper consists in the description and application of a method called wavelet-induced mode extraction (WIME) in the context of time-frequency analysis. WIME aims to extract the oscillating components ... [more ▼]

This paper consists in the description and application of a method called wavelet-induced mode extraction (WIME) in the context of time-frequency analysis. WIME aims to extract the oscillating components that build amplitude modulated-frequency modulated signals. The essence of this technique relies on the successive extractions of the dominant ridges of wavelet-based time-frequency representations of the signal under consideration. Our tests on simulated examples indicate strong decomposition and reconstruction skills, trouble-free handling of crossing trajectories in the time-frequency plane, sharp performances in frequency detection in the case of mode-mixing problems, and a natural tolerance to noise. These results are compared with those obtained with empirical mode decomposition. We also show that WIME still gives meaningful results with real-life data, namely, the Oceanic Niño Index. [less ▲]

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See detailAn update on ozone profile trends for the period 2000 to 2016
Steinbrecht, Wolfgang; Froidevaux, Lucien; Fuller, Ryan et al

in Atmospheric Chemistry and Physics (2017), 17(17), 10675-10690

Ozone profile trends over the period 2000 to 2016 from several merged satellite ozone data sets and from ground-based data by four techniques at stations of the Network for the Detection of Atmospheric ... [more ▼]

Ozone profile trends over the period 2000 to 2016 from several merged satellite ozone data sets and from ground-based data by four techniques at stations of the Network for the Detection of Atmospheric Composition Change indicate significant ozone increases in the upper stratosphere, between 35 and 48 km altitude (5 and 1 hPa). Near 2 hPa (42 km), ozone has been increasing by about 1.5 % per decade in the tropics (20°S to 20°N), and by 2 to 2.5 % per decade in the 35° to 60° latitude bands of both hemispheres. At levels below 35 km (5 hPa), 2000 to 2016 ozone trends are smaller and not statistically significant. The observed trend profiles are consistent with expectations from chemistry climate model simulations. Using three to four more years of observations and updated data sets, this study confirms positive trends of upper stratospheric ozone already reported, e.g., in the WMO/UNEP Ozone Assessment 2014, or by Harris et al. (2015). The additional years, and the fact that nearly all individual data sets indicate these increases, give enhanced confidence. Nevertheless, a thorough analysis of possible drifts and differences between various data sources is still required, as is a detailed attribution of the observed increases to declining ozone depleting substances and to stratospheric cooling. Ongoing quality observations from multiple independent platforms are key for verifying that recovery of the ozone layer continues as expected. [less ▲]

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See detailPreliminary Phytochemical Content and Antidiabetic Potential Investigations of Panda oleosa (Pierre) Used in Kisangani Areas
Katemo Muhoya, Frédéric; Kadima Ntokamunda, Justin; Njakarinala Ranarivelo et al

in American Journal of Analytical Chemistry (2017), 8

Panda oleosa Pierre (POP), a tropical plant tree, has been used in traditional medicine in Kisangani city and around to treat various diseases including diabètes and HIV/AIDs. This study aims to evaluate ... [more ▼]

Panda oleosa Pierre (POP), a tropical plant tree, has been used in traditional medicine in Kisangani city and around to treat various diseases including diabètes and HIV/AIDs. This study aims to evaluate the chemical composition of POP extracts while setting up chromatographic fingerprints for their quality control, and the anti-hyperglycemic potential of trunk bark aqueous extracts of POP. Common chemical reactions were used for identification of main secondary metabolic groups. Thin layer chromatography was used to set up several chromatographic fingerprints of water and alcoholic extracts while evaluating chemical composition. Oral glucose tolerance test served to induce hyperglycemia in a rabbit model. The extracts were given as 25 mg/kg, 50 mg/kg, and 100 mg/kg body weight, 30 minutes before loading animals with glucose 4 g/kg. Blood samples were collected at various times: just before extracts (T-30), before (T0) and after glucose load (T30, T60, T120, and T180). Blood glucose levels were measured with One Touch Glucometer. The identification tests revealed the presence of saponins (3.58%), tannins (5%); alkaloids, quinones, flavonoids, and terpenes sterols could not be formerly detected by the reagents used. Interesting chromatographic spots were observed whose behaviors are of catechic tannin proanthocyanes. The extract significantly reduced glucose levels in dose dependent manner as compared to control and glibenclamide reference groups. The average of mean percentage of reduction in glucose level at T120 with the extract 100 mg/kg was close to that of glibenclamide 0.25 mg/kg (49% and 40.2%). These findings back the traditional use of the plant to treat diabetic patients and constitute a foundation for an extensive study to find a new antidiabetic phythomedicine. [less ▲]

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See detailGenetic evaluation for birth and conformation traits in dual-purpose Belgian Blue cattle using a mixed inheritance model
REIS MOTA, Rodrigo ULiege; Mayeres, P.; Bastin, Catherine et al

in Journal of Animal Science (2017)

The segregation of the causal mutation (mh) in the muscular hypertrophy gene in dual-purpose Belgian Blue (dpBB) cattle is considered to result in greater calving difficulty (dystocia). Establishing ... [more ▼]

The segregation of the causal mutation (mh) in the muscular hypertrophy gene in dual-purpose Belgian Blue (dpBB) cattle is considered to result in greater calving difficulty (dystocia). Establishing adapted genetic evaluations might overcome this situation through efficient selection. However, the heterogeneity of dpBB populations at the mh locus implies separating the major gene and other polygenic effects in complex modeling. The use of mixed inheritance models may be an interesting option because they simultaneously assume both influences. A genetic evaluation in dpBB based on a mixed inheritance model was developed for birth and conformation traits: gestation length (GL), calving difficulty (CD), birth weight (BiW), and body conformation score (BC). A total of 27,362 animals having records were used for analyses. The total number of animals in the pedigree used to build the numerator relationship matrix was 62,617. Genotypes at the mh locus were available for 2,671 animals. Missing records at this locus were replaced with genotype probabilities. A total of 13,221 (48.3%) were registered as dpBB, 1,287 (4.7%) as beef Belgian Blue, and 12,854 (47.0%) were unknown. From those 13,221dpBB animals, 650, 849, and 534 had double or single copies or no copy, respectively, of the causal mutation (mh) in the muscular hypertrophy gene, whereas 11,188 had missing genotypes. This heterogeneity at the mh locus may be the reason for high variability in the studied traits, that is, high heritability estimates of 0.33, 0.30, 0.38, and 0.43 for GL, CD, BiW, and BC, respectively. In general, additive (P < 0.05) and dominance (P < 0.001) allele substitution for calves and dams had significant impact for all traits. The moderate coefficient of genetic variation (27.80%) and high direct heritability (0.28) for CD suggested genetic variability in dpBB and possible genetic improvement through selection. This variability has allowed dpBB breeders to successfully apply mass selection in the past. Genetic trend means from 1988 to 2016 showed that sire selection for CD within genotype was progressively applied by breeders. The selection intensity was more important for CD in double-muscled lines than in segregated lines. Our study illustrated the possible confusion caused by the use of major genes in selection and the importance of fitting appropriate models such as mixed inheritance models that combine polygenic and gene content information. [less ▲]

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See detailExozodiacal clouds: hot and warm dust around main sequence stars
Kral, Quentin; Krivov, Alexander V.; Defrere, Denis ULiege et al

in Astronomical Review (2017), 13(2), 69-111

A warm/hot dust component (at temperature $>$ 300K) has been detected around $\sim$ 20% of stars. This component is called "exozodiacal dust" as it presents similarities with the zodiacal dust detected in ... [more ▼]

A warm/hot dust component (at temperature $>$ 300K) has been detected around $\sim$ 20% of stars. This component is called "exozodiacal dust" as it presents similarities with the zodiacal dust detected in our Solar System, even though its physical properties and spatial distribution can be significantly different. Understanding the origin and evolution of this dust is of crucial importance, not only because its presence could hamper future detections of Earth-like planets in their habitable zones, but also because it can provide invaluable information about the inner regions of planetary systems. In this review, we present a detailed overview of the observational techniques used in the detection and characterisation of exozodiacal dust clouds ("exozodis") and the results they have yielded so far, in particular regarding the incidence rate of exozodis as a function of crucial parameters such as stellar type and age, or the presence of an outer cold debris disc. We also present the important constraints that have been obtained, on dust size distribution and spatial location, by using state-of-the-art radiation transfer models on some of these systems. Finally, we investigate the crucial issue of how to explain the presence of exozodiacal dust around so many stars (regardless of their ages) despite the fact that such dust so close to its host star should disappear rapidly due to the coupled effect of collisions and stellar radiation pressure. Several potential mechanisms have been proposed to solve this paradox and are reviewed in detail in this paper. The review finishes by presenting the future of this growing field. [less ▲]

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See detailAnalysis of definitions of General Practice/Family Medicine and Primary Health Care
Jamoulle, Marc ULiege; Resnick, Melissa; Ittoo, Ashwin ULiege et al

in British Journal of General Practice (2017), 0050

Abstract Background There are numerous definitions of General Practice and Family Medicine (GP/FM) and Primary Health Care (PHC), but the distinction between the two concepts is unclear. Aim To conduct a ... [more ▼]

Abstract Background There are numerous definitions of General Practice and Family Medicine (GP/FM) and Primary Health Care (PHC), but the distinction between the two concepts is unclear. Aim To conduct a terminological analysis of a set of definitions of GP/FM and of PHC, to clarify what binds and what distinguishes these two concepts. Design The terms of 20 definitions were collected in two bags of words (one for GP/FM and one for PHC terms). A terminological analysis of these two bags of words was performed to prioritize the terms and analyze their world of reference. Methods The two collected bags of words were extracted with Vocabgrabber®, configured in two term butts using Wordle®, and further explored for similarities using Tropes®. The prioritized terms were analyzed using the Aristotelian approach to categorization of things. Results Although continuity of care (with person-centered approach and shared decision making) is the central issue of the two sets, the two sets of definitions differ greatly in content. The prioritized terms specific to GP/FM (community, medicine, responsibility, individual, problem, needs, ...) are different from prioritized terms specific to PHC (home, team, promotion, collaborator, engagement, neighborhood, medical center…). Conclusion Terminological analysis of the definitions for GP/FM and PHC shows two entities which are overlapping but distinct, necessitating a different taxonomic approach and different bibliographic search strategies. [less ▲]

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See detailIdentification, Characterization and Full-Length Sequence Analysis of a Novel Polerovirus Associated with Wheat Leaf Yellowing Disease
Zhang, Peipei; Liu, Yan; Liu, Wenwen et al

in Frontiers in Microbiology (2017), 8(1689),

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See detailRadiological monitoring and statistical approach of primordial and anthropogenic radionuclides in surface soil of Mami-water site in the Western Cameroon
Nguelem, Eric J.; Ndontchueng, Maurice; Motapon, Ousmanou et al

in Environmental Earth Sciences (2017), 76

The study referred to measure activity concentrations of some primordial radionuclides and anthropogenic of 137Cs in soil samples of Mami-water in the Menoua subdivision, Dschang employing gamma-ray ... [more ▼]

The study referred to measure activity concentrations of some primordial radionuclides and anthropogenic of 137Cs in soil samples of Mami-water in the Menoua subdivision, Dschang employing gamma-ray spectrometry-based characterized Broad Energy Germanium (BE6350) detector and a comparison of radiological and safety impact parameters on human due to primordial radioactivity in soil with some internationally approved values. In addition, statistical analysis of primordial radionuclides of 226Ra, 232Th and 40K was performed to evaluate the distribution and the interrelation of radionuclides. Samples were randomly collected from a depth of about 0 to 5 cm from the top surface layer. Each of the sampling points was considered as being overlaid with a grid and subdivided into cells. The observed radioactivity level of 226Ra, 232Th and 40K in the investigated soil samples was compared with some published data available in some countries including Cameroon and observed varying within some reported data of radioactivity in soil from bauxite ore deposit. 235U and 137Cs were found in very few samples with a very low average of activity concentrations. In the majority of the samples, the observed radiological safety parameters seem to be greater than the internationally approved values. Consequently, using bricks made of soil as building materials might lead to an increase in radiation risk for the population. Multivariate statistical analysis of activity concentrations of primordial radionuclides performed showed an asymmetrical distribution with more peaked than Gaussian distribution and relatively flatter distribution of radionuclides in soil. In addition, a good positive interrelation between 226Ra and 232Th was observed and a weak negative one observed between 40K and 226Ra–232Th. [less ▲]

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See detailNew constraints on quasar broad absorption and emission line regions from gravitational microlensing
Hutsemekers, Damien ULiege; Braibant, Lorraine ULiege; Sluse, Dominique ULiege et al

in Frontiers in Astronomy and Space Sciences (2017), 4

Gravitational microlensing is a powerful tool allowing one to probe the structure of quasars on sub-parsec scale. We report recent results, focusing on the broad absorption and emission line regions. In ... [more ▼]

Gravitational microlensing is a powerful tool allowing one to probe the structure of quasars on sub-parsec scale. We report recent results, focusing on the broad absorption and emission line regions. In particular microlensing reveals the intrinsic absorption hidden in the P Cygni-type line profiles observed in the broad absorption line quasar H1413+117, as well as the existence of an extended continuum source. In addition, polarization microlensing provides constraints on the scattering region. In the quasar Q2237+030, microlensing differently distorts the Hα and CIV broad emission line profiles, indicating that the low- and high-ionization broad emission lines must originate from regions with distinct kinematical properties. We also present simulations of the effect of microlensing on line profiles considering simple but representative models of the broad emission line region. Comparison of observations to simulations allows us to conclude that the Hα emitting region in Q2237+030 is best represented by a Keplerian disk. [less ▲]

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See detailDiscrete and broadband electron acceleration in Jupiter's powerful aurora
Mauk, B. H.; Haggerty, D. K.; Paranicas, C. et al

in Nature (2017), 549

The most intense auroral emissions from Earth's polar regions, called discrete for their sharply defined spatial configurations, are generated by a process involving coherent acceleration of electrons by ... [more ▼]

The most intense auroral emissions from Earth's polar regions, called discrete for their sharply defined spatial configurations, are generated by a process involving coherent acceleration of electrons by slowly evolving, powerful electric fields directed along the magnetic field lines that connect Earth's space environment to its polar regions. In contrast, Earth's less intense auroras are generally caused by wave scattering of magnetically trapped populations of hot electrons (in the case of diffuse aurora) or by the turbulent or stochastic downward acceleration of electrons along magnetic field lines by waves during transitory periods (in the case of broadband or Alfvénic aurora). Jupiter's relatively steady main aurora has a power density that is so much larger than Earth's that it has been taken for granted that it must be generated primarily by the discrete auroral process. However, preliminary in situ measurements of Jupiter's auroral regions yielded no evidence of such a process. Here we report observations of distinct, high-energy, downward, discrete electron acceleration in Jupiter's auroral polar regions. We also infer upward magnetic-field-aligned electric potentials of up to 400 kiloelectronvolts, an order of magnitude larger than the largest potentials observed at Earth. Despite the magnitude of these upward electric potentials and the expectations from observations at Earth, the downward energy flux from discrete acceleration is less at Jupiter than that caused by broadband or stochastic processes, with broadband and stochastic characteristics that are substantially different from those at Earth. [less ▲]

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See detailImproving pedestrian detection using motion-guided filtering
Wang, Yi; Pierard, Sébastien ULiege; Su, Song-Zhi et al

in Pattern Recognition Letters (2017), 96

In this letter, we show how a simple motion-guided nonlinear filter can drastically improve the accuracy of several pedestrian detectors. More specifically, we address the problem of how to pre-filter an ... [more ▼]

In this letter, we show how a simple motion-guided nonlinear filter can drastically improve the accuracy of several pedestrian detectors. More specifically, we address the problem of how to pre-filter an image so almost any pedestrian detector will see its false detection rate decrease. First, we roughly identify moving pixels by cumulating their temporal gradient into a motion history image (MHI). The MHI is then used in conjunction with a nonlinear filter to filter out background details while leaving untouched foreground moving objects. We also show how a feedback loop as well as a merging procedure between the filtered and the unfiltered frames can further improve results. We tested our method on 26 videos from 6 categories. The results show that for a given miss rate, filtering out background details reduces the false detection rate by a factor of up to 69.6 times. Our method is simple, computationally light, and can be implemented with any pedestrian detector. Code is made publicly available at: https://bitbucket.org/wany1601/pedestriandetection. [less ▲]

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See detailTemporal Evolution of the High-energy Irradiation and Water Content of TRAPPIST-1 Exoplanets
Bourrier, V.; de Wit, J.; Bolmont, E. et al

in Astronomical Journal (The) (2017), 154

The ultracool dwarf star TRAPPIST-1 hosts seven Earth-size transiting planets, some of which could harbor liquid water on their surfaces. Ultraviolet observations are essential to measuring their high ... [more ▼]

The ultracool dwarf star TRAPPIST-1 hosts seven Earth-size transiting planets, some of which could harbor liquid water on their surfaces. Ultraviolet observations are essential to measuring their high-energy irradiation and searching for photodissociated water escaping from their putative atmospheres. Our new observations of the TRAPPIST-1 Lyα line during the transit of TRAPPIST-1c show an evolution of the star emission over three months, preventing us from assessing the presence of an extended hydrogen exosphere. Based on the current knowledge of the stellar irradiation, we investigated the likely history of water loss in the system. Planets b to d might still be in a runaway phase, and planets within the orbit of TRAPPIST-1g could have lost more than 20 Earth oceans after 8 Gyr of hydrodynamic escape. However, TRAPPIST-1e to h might have lost less than three Earth oceans if hydrodynamic escape stopped once they entered the habitable zone (HZ). We caution that these estimates remain limited by the large uncertainty on the planet masses. They likely represent upper limits on the actual water loss because our assumptions maximize the X-rays to ultraviolet-driven escape, while photodissociation in the upper atmospheres should be the limiting process. Late-stage outgassing could also have contributed significant amounts of water for the outer, more massive planets after they entered the HZ. While our results suggest that the outer planets are the best candidates to search for water with the JWST, they also highlight the need for theoretical studies and complementary observations in all wavelength domains to determine the nature of the TRAPPIST-1 planets and their potential habitability. [less ▲]

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See detailApplication of a two-step approach for mapping ice thickness to various glacier types on Svalbard
Fürst, J.; Gillet-Chaulet, F.; Benham, T. et al

in Cryosphere (The) (2017)

The basal topography is largely unknown beneath most glaciers and ice caps, and many attempts have been made to estimate a thickness field from other more accessible information at the surface. Here, we ... [more ▼]

The basal topography is largely unknown beneath most glaciers and ice caps, and many attempts have been made to estimate a thickness field from other more accessible information at the surface. Here, we present a two-step reconstruction approach for ice thickness that solves mass conservation over single or several connected drainage basins. The approach is applied to a variety of test geometries with abundant thickness measurements including marine- and land-terminating glaciers as well as a 2400 km2 ice cap on Svalbard. The input requirements are kept to a minimum for the first step. In this step, a geometrically controlled, non-local flux solution is converted into thickness values relying on the shallow ice approximation (SIA). In a second step, the thickness field is updated along fast-flowing glacier trunks on the basis of velocity observations. Both steps account for available thickness measurements. Each thickness field is presented together with an error-estimate map based on a formal propagation of input uncertainties. These error estimates point out that the thickness field is least constrained near ice divides or in other stagnant areas. Withholding a share of the thickness measurements, error estimates tend to overestimate mismatch values in a median sense. We also have to accept an aggregate uncertainty of at least 25 % in the reconstructed thickness field for glaciers with very sparse or no observations. For Vestfonna ice cap (VIC), a previous ice volume estimate based on the same measurement record as used here has to be corrected upward by 22 %. We also find that a 13 % area fraction of the ice cap is in fact grounded below sea level. The former 5 % estimate from a direct measurement interpolation exceeds an aggregate maximum range of 6–23 % as inferred from the error estimates here. [less ▲]

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See detailAfrican media and the corporate takeover: Video film circulation in the age of neoliberal transformations
Jedlowski, Alessandro ULiege

in African Affairs (2017), 116(465), 671-691

This article considers the economic effects of corporatization processes in Africa through an analysis of the intervention of French media companies in the economy of Nigerian video film distribution in ... [more ▼]

This article considers the economic effects of corporatization processes in Africa through an analysis of the intervention of French media companies in the economy of Nigerian video film distribution in Frenchspeaking West Africa, and particularly in Côte d’Ivoire. In a global context that is marked by the price volatility of raw materials such as oil and copper, screen media have been described as the new ‘African black gold’, attracting the interest of a large number of both African and non- African players and setting in motion a process of the ‘corporate takeover’ of African screen media industries. Analysing this process can help us to understand wider economic transformations in Africa. This article examines what we might call the ‘technopolitics’ of Nigerian video films’ circulation and their historical transformations by examining the microdimension of the experiences of a number of West African video film producers and distributors, and the macro-dimension of the activities of a French corporation, CanalPlus, which is investing in Nollywood’s distribution. It argues that Nollywood has acquired a strategic function for French enterprises that are investing in Africa, as evidenced by the transformation of Côte d’Ivoire’s role in the economy of Nigerian video films’ transnational circulation. This suggests a new and transformed dimension to France’s economic and political relationships with sub-Saharan Africa, as well as a more nuanced assessment of the politics of African neoliberalism. [less ▲]

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See detailDeux décennies d’augmentation des prix immobiliers résidentiels en Wallonie (1995-2015)
Artige, Lionel ULiege; Reginster, Alexandre ULiege

in Dynamiques régionales (2017), 5(2), 9-22

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See detailGenuinely entangled symmetric states with no N-partite correlations
Designolle; Giraud, Olivier; Martin, John ULiege

in Physical Review A (2017), 96

We investigate genuinely entangled N-qubit states with no N-partite correlations in the case of symmetric states. Using a tensor representation for mixed symmetric states, we obtain a simple ... [more ▼]

We investigate genuinely entangled N-qubit states with no N-partite correlations in the case of symmetric states. Using a tensor representation for mixed symmetric states, we obtain a simple characterization of the absence of N-partite correlations. We show that symmetric states with no N-partite correlations cannot exist for an even number of qubits. We fully identify the set of genuinely entangled symmetric states with no N-partite correlations in the case of three qubits, and in the case of rank-2 states. We present a general procedure to construct families for an arbitrary odd number of qubits. [less ▲]

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See detailStructures fédérale et régionale et procédures référendaires
Miny, Xavier ULiege

in Annuaire International de Justice Constitutionnelle (2017), XXXII

Notre propos vise à étudier les interactions entre le fédéralisme et les mécanismes de démocratie directe. En effet, au sein d'une structure fédérale ou régionale, il existe une complexification de la ... [more ▼]

Notre propos vise à étudier les interactions entre le fédéralisme et les mécanismes de démocratie directe. En effet, au sein d'une structure fédérale ou régionale, il existe une complexification de la mise en œuvre des mécanismes référendaires. Dans un contexte parfois multinational, il est inapproprié de rechercher la volonté populaire au moyen d’une simple approche majoritaire qui ne renseigne pas suffisamment sur l’existence des différentes communautés sociales et politiques au sein de l'État. L'objectif de la recherche est d'analyser, par le biais du droit comparé, les adaptations qui existent dans certains États. [less ▲]

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See detailOrgan Procurement and Transplantation in Belgium.
DETRY, Olivier ULiege; Van Deynse, Dominique; Van Vlierberghe, Hans et al

in Transplantation (2017), 101(9), 1953-1955

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See detailcompte rendu de : James Clackson, Language and Society in the Greek and Roman Worlds, Cambridge, Cambridge University Press, 2015
Rochette, Bruno ULiege

in Latomus : Revue d'Etudes Latines (2017), 76(3), 609-610

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See detailTraduction de l'article de Scott M. Bock : CLASSIE BALLOU "Classy" Swamp Blues
Sacré, Robert ULiege

in ABS Magazine (2017), (ABS MAG # 57),

Biographie de Classie Ballou, un musicien noir de Louisiane ; photos

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See detailNoël 2010 en Belgique : neige en Flandre et pluie en Haute-Ardenne
Fettweis, Xavier ULiege; Wyard, Coraline ULiege; Doutreloup, Sébastien ULiege et al

in Bulletin de la Société Géographique de Liège (2017), 68

On December 2010, several snow events allowed an exceptional snow cover over Belgium. 27 days with snow cover were observed at Uccle and snow depths of 20, 30 and 70 cm were measured on Christmas 2010 ... [more ▼]

On December 2010, several snow events allowed an exceptional snow cover over Belgium. 27 days with snow cover were observed at Uccle and snow depths of 20, 30 and 70 cm were measured on Christmas 2010 respectively at Uccle, Bierset and Mont Rigi in the Hautes-Fagnes. On December 20, while the entire Belgium was covered by a thick blanket of snow, warmer air invaded the country on December 21. This air was quickly replaced by polar air in Lower and Central Belgium (including Bierset). Heavy snowfalls were observed on December 22 and 23, except in the Upper Ardennes where rainfalls occurred under positive temperature which then dropped to -5°C. This event was due to a strong thermal inversion in the lower layers with warm air at 850 hPa above the Ardennes only. This paper aims to explain this atypical extreme event using the regional climate model MAR developed at the University of Liège [less ▲]

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See detailLe pouvoir judiciaire et l'équilibre des pouvoirs : réflexions à propos des récentes réformes
Bouhon, Frédéric ULiege; Pironnet, Quentin ULiege

in Pyramides : Revue du Laboratoire d'Etudes et de Recherches en Administration Publique (2017), 29

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See detailVariability in elective day-surgery rates between Belgian hospitals - Analyses of administrative data explained by surgical experts
Leroy, Roos; Camberlin, Cécile; Lefevre, Mélanie ULiege et al

in International Journal of Surgery (London, England) (2017), 45

Background In the last decades, day surgery has steadily and significantly grown in many countries, yet the increase has been uneven. There are large variations in day-surgery activity between countries ... [more ▼]

Background In the last decades, day surgery has steadily and significantly grown in many countries, yet the increase has been uneven. There are large variations in day-surgery activity between countries, but also within countries between hospitals and surgeons. This paper explores the variability in day-care activity for elective surgical procedures between Belgian hospitals. Materials and methods The administrative hospital data of all patients formally admitted in a Belgian hospital for inpatient or day-surgery care between 2011 and 2013 were analysed and summarized in graphs. During 11 expert meetings with ad-hoc surgical expert groups the variability in day-surgery share between hospitals was discussed in depth. Results The variability in day-care share between Belgian hospitals is considerable. For 37 out of 486 elective surgical procedures, the variability ranged between 0 and 100%. High national day-care rates do not preclude room for improvement for certain hospitals as for the majority of these procedures there are “low performers”. According to the consulted clinical experts, the high variability in day-care share may for the greater part be explained by medical team related factors, customs and traditions, the lack of clinical guidelines, financial factors, organisational factors and patient related factors. Conclusion If a further expansion of day surgery is envisaged in Belgium the factors that contribute to the current variability in day-surgery rates between hospitals should be addressed. In addition, a feedback system in which hospitals and health care providers have the figures on their percentage of procedures carried out in day surgery compared to other hospitals and care providers (benchmarking) and the monitoring of a number of quality indicators (e.g. unplanned readmission, unplanned inpatient stay, emergency department visit) should be installed. [less ▲]

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See detailComposantes météorologiques de la base de données océanographique RACE de STARESO (Baie de Calvi – Corse)
Binard, Marc ULiege

in Bulletin de la Société Géographique de Liège (2017), 68

Since the creation of the Calvi oceanographic station (STARESO) in the early 1970s, a great deal of data has been acquired by ULg researchers. In 2005 it was decided to create the RACE database in order ... [more ▼]

Since the creation of the Calvi oceanographic station (STARESO) in the early 1970s, a great deal of data has been acquired by ULg researchers. In 2005 it was decided to create the RACE database in order not only to preserve the old and current measures but also to promote their dissemination and exploitation. In this article, particular attention is paid to the acquisition and exploitation of the meteorological data of the RACE database and also the CalviOnLine database updated every 20 minutes by the on line reception of the new climatological data from a meteorological station located close to the oceanographic station. [less ▲]

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See detailWater chemical evolution in Underground Pumped Storage Hydropower plants and induced consequences
Pujades, Estanislao ULiege; Orban, Philippe ULiege; Jurado Elices, Anna ULiege et al

in Energy Procedia (2017), 125

Underground Pumped Storage Hydropower (UPSH) is an alternative to manage the electricity production in flat regions. UPSH plants consist of two reservoirs of which at least one is underground. For this ... [more ▼]

Underground Pumped Storage Hydropower (UPSH) is an alternative to manage the electricity production in flat regions. UPSH plants consist of two reservoirs of which at least one is underground. For this last reservoir, abandoned mines could be considered. UPSH related activities may induce hydrochemical variations, such as the increase of the oxygen (O2) partial pressure (pO2), which may entail negative consequences in terms of environment and efficiency, especially in coal mined areas where the presence of sulfide minerals is common. This work assesses the main expected environmental impacts that UPSH using abandoned coal mines may induce. [less ▲]

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See detailBrentano, la théorie des catégories et la définition de la substance
Boccaccini, Federico ULiege

in Etudes Philosophiques (2017)

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See detailA multifractal formalism for non-concave and non-increasing spectra: the leaders profile method
Esser, Céline ULiege; Kleyntssens, Thomas ULiege; Nicolay, Samuel ULiege

in Applied & Computational Harmonic Analysis (2017), 43(2), 269-291

We present an implementation of a multifractal formalism based on the types of histogram of wavelet leaders. This method yields non-concave spectra and is not limited to their increasing part. We show ... [more ▼]

We present an implementation of a multifractal formalism based on the types of histogram of wavelet leaders. This method yields non-concave spectra and is not limited to their increasing part. We show both from the theoretical and from the applied points of view that this approach is more e cient than the wavelet-based multifractal formalisms previously introduced. [less ▲]

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See detailReliability of unipodal and bipodal counter movement jump landings in a recreational male population
Schwartz, Cédric ULiege; Forthomme, Bénédicte ULiege; Paulus, Julien ULiege et al

in European Journal of Sport Science (2017), 17(9), 1143-1152

Movement patterns during landing have been suggested to be related to injury risk. The purpose of this study was to determine the inter-session reliability of kinematic variables and ground reaction ... [more ▼]

Movement patterns during landing have been suggested to be related to injury risk. The purpose of this study was to determine the inter-session reliability of kinematic variables and ground reaction forces during landing in a population of male recreational athletes after a counter movement jump. Both unipodal and bipodal landings were evaluated. Furthermore, the possibility to improve landing reliability with a verbal instruction was also studied. Twenty- four male volunteers with no history of lower-extremity trauma were randomly assigned to two groups (with and without verbal landing instruction). An optoelectronic 3D system and force plates were used to measure the lower-limb joint angles and the ground reaction forces during landing. Intraclass correlation values show moderate to excellent inter-session reliability for the bipodal task (ICC average: 0.80, range: 0.46 to 0.97) and poor to excellent reliability for the unipodal task (ICC average: >0.75, range: 0.20 to 0.95). However, large standard errors of measurement values at the ankle joint at impact (27.6 ± 11.5°) and for the vertical ground reaction forces (394 ± 1091 N) show that some variables may not be usable in practice. The verbal instruction had a negative effect on the reliability of unipodal landing but improved the reliability of bipodal landing. These findings show that the reliability of a landing task is influenced by its motor complexity as well as the instruction given to the subject. [less ▲]

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See detailSex and gender in family business succession research: A review and forward agenda from a social construction perspective
Nelson, Teresa; Constantinidis, Christina ULiege

in Family Business Review (2017), 30(3), 219-241

This article focuses on how family business succession research has engaged and may be further enriched by application of a gender lens as socially constructed. We analyze the succession literature ... [more ▼]

This article focuses on how family business succession research has engaged and may be further enriched by application of a gender lens as socially constructed. We analyze the succession literature developing a gender terms vocabulary and five themes of historical engagement. Finding a lack of theoretical grounding, we apply the construct of gender, through expectation states theory, revising the Sharma and Irving model of successor commitment to examine how a socially constructed view of gender shifts and opens up points of view. We then present a forward looking agenda to motivate future scholarship. [less ▲]

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See detailL'(ir)responsabilité du pouvoir judiciaire : fondement et mise à l'épreuve de l'immunité judiciaire en droits québécois et belge
Bouhon, Frédéric ULiege; Lacroix, Mariève

in Revue de Droit International et de Droit Comparé (2017), 2017/3

Ce long article compare les régimes juridiques belge et québécois sur la question de la responsabilité civile pour les fautes commises par les juges dans l'exercice du pouvoir judiciaire. Bien que les ... [more ▼]

Ce long article compare les régimes juridiques belge et québécois sur la question de la responsabilité civile pour les fautes commises par les juges dans l'exercice du pouvoir judiciaire. Bien que les solutions retenues de part et d’autre de l’Atlantique semblent divergentes a priori – absolutisme de l’immunité du juge au Québec et relativisation de celle-ci en Belgique –, un examen plus approfondi révèle que les incidences pratiques ne sont pas aussi radicalement opposées. Certes, l’État belge peut engager sa responsabilité civile en présence d’une faute du juge, ce qui ne saurait être admis au Québec , mais les modalités de l’action civile que la jurisprudence belge a retenues (spécialement la condition de recevabilité et la notion de faute caractérisée) limitent fortement l’ampleur du contentieux dans ce domaine. Par ailleurs, au Québec, on relève un infléchissement – purement théorique, car aucun cas concret où la responsabilité civile du juge a été retenue n’existe à l’heure actuelle – du principe de l’immunité absolue du juge dans le cadre de sa responsabilité civile personnelle, lorsqu’il agit sans compétence, tout en sachant ne pas avoir compétence d’agir ainsi. [less ▲]

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See detailEarly Detection of University Students with Potential Difficulties
Hoffait, Anne-Sophie ULiege; Schyns, Michael ULiege

in Decision Support Systems (2017), 101

Using data mining methods, this paper presents a new means of identifying freshmen's profiles likely to face major difficulties to complete their first academic year. Academic failure is a relevant issue ... [more ▼]

Using data mining methods, this paper presents a new means of identifying freshmen's profiles likely to face major difficulties to complete their first academic year. Academic failure is a relevant issue at a time when post-secondary education is ever more critical to economic success. We aim at early detection of potential failure using student data available at registration, i.e. school records and environmental factors, with a view to timely and efficient remediation and/or study reorientation. We adapt three data mining methods, namely random forest, logistic regression and artificial neural network algorithms. We design algorithms to increase the accuracy of the prediction when some classes are of major interest. These algorithms are context independent and can be used in different fields. Real data pertaining to undergraduates at the University of Liège (Belgium), illustrates our methodology. [less ▲]

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See detailLa normalisation européenne après l’arrêt James Elliott Construction du 27 octobre 2016 : la Cour de justice de l’Union européenne a-t-elle élargi ses compétences d’interprétation ?
Van Cleynenbreugel, Pieter ULiege; Demoulin, Iris ULiege

in Revue de la Faculté de Droit de l'Université de Liège (2017), (2),

Malgré son importance pratique, le processus de normalisation européenne a jusqu’à présent été relativement épargné par la Cour de justice. Toutefois, dans son arrêt James Elliott Construction du 27 ... [more ▼]

Malgré son importance pratique, le processus de normalisation européenne a jusqu’à présent été relativement épargné par la Cour de justice. Toutefois, dans son arrêt James Elliott Construction du 27 octobre 2016, la Cour s’est penchée directement sur le statut juridique des normes techniques européennes. Confirmant que l’interprétation des normes techniques harmonisées, actes non contraignantes, peut être soumise à un examen jurisprudentiel, la Cour a assimilé ces normes adoptées par des organismes privés à des actes des institutions de l’Union européenne. Cet article analyse les impacts de cet arrêt sur le cadre institutionnel de la normalisation européenne. Une telle analyse permettra de conclure que la Cour a interprété ses compétences d’interprétation extensivement afin de rendre possible plus directe son implication dans cette matière. [less ▲]

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See detailLe service minimum à l'aune de la Convention européenne des droits de l'homme : interdiction, possibilité ou obligation pour le législateur belge?
Bouhon, Frédéric ULiege; Vandenbosch, Sofia ULiege

in Revue de Droit Social = Tijdschrift voor Sociaal Recht (2017), 3(2017), 585-612

The implementation of minimum service, which aims at guaranteeing continuity of some activities despite a strike, constitutes an interference with the right to strike. Considered under article 11 of the ... [more ▼]

The implementation of minimum service, which aims at guaranteeing continuity of some activities despite a strike, constitutes an interference with the right to strike. Considered under article 11 of the European Convention on Human Rights, this implementation appears to be, depending on the situation, either a legally forbidden measure, or an option open to the authorities or an adequate mean to fulfil a positive obligation. This legal context circumscribes the margin of appreciation of the Belgian legislator in this field. [less ▲]

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See detailAnticoherence measures for pure spin states
Baguette, Dorian ULiege; Martin, John ULiege

in Physical Review A (2017), 96

The set of pure spin states with vanishing spin expectation value can be regarded as the set of the less coherent pure spin states. This set can be divided into a finite number of nested subsets on the ... [more ▼]

The set of pure spin states with vanishing spin expectation value can be regarded as the set of the less coherent pure spin states. This set can be divided into a finite number of nested subsets on the basis of higher order moments of the spin operators. This subdivision relies on the notion of anticoherent spin state to order t : A spin state is said to be anticoherent to order t if the moment of order k of the spin components along any directions are equal for k = 1,2, . . . ,t . Most spin states are neither coherent nor anticoherent, but can be arbitrary close to one or the other. In or- der to quantify the degree of anticoherence of pure spin states, we introduce the notion of anticoherence measures. By relying on the mapping between spin-j states and symmetric states of 2j spin 1/2 (Majorana representation), we present a systematic way of constructing anticoherence measures to any order. We briefly discuss their connection with measures of quantum coherence. Finally, we illustrate our measures on various spin states and use them to investigate the problem of the existence of anticoherent spin states with degenerated Majorana points. [less ▲]

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See detailInfluence of rock fragments on hydraulic properties of Ultisols in Ratchaburi Province, Thailand
Khetdan, Channarong; Chittamart, Natthapol; Tawornpruek, Saowanuch et al

in Geoderma Regional (2017), 10

In Thailand, stony soils are mainly located in hillside areas. Even though they have physical limitations for agricultural use and they are exposed to a risk for soil erosion, they continue to be used for ... [more ▼]

In Thailand, stony soils are mainly located in hillside areas. Even though they have physical limitations for agricultural use and they are exposed to a risk for soil erosion, they continue to be used for crop production. A good understanding of the hydraulic characteristics of soils containing an important fraction of rock fragments is crucial for soil and water management in these areas. The objective of this study was to investigate the influence of different rock fragment contents on effective hydraulic properties of skeletal soil with a clay content lower than 35% using measurements of the water retention curve and the hydraulic conductivity. A tension infiltrometer was used to determine the field hydraulic conductivity at four pressure heads (h) of 0, − 30, − 60 and − 120 mm. Soil water retention was determined on a pressure plate between − 33 and − 1500 kPa. Finally, the Hydrus-1D was used to predict soil moisture dynamics using the obtained effective hydraulic parameters. The results show a decreasing water retention capacity with increasing rock fragment content. The saturated hydraulic conductivity decreased with increasing stone contents from 0 to 20%, but then increased for increasing stone content. Contradicting behavior can be observed using field and lab measurements, clearly exposing the need for a better understanding of the functioning of stony soils. [less ▲]

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See detailComputação paralela aplicada à seleção genômica via inferência Bayesiana
LAGROTTA, Marcos Rodrigues; FONSECA E SILVA, Fabyano; VILELA DE RESENDE, Marcos Deon et al

in REVISTA BRASILEIRA DE BIOMETRIA (2017), 35(3), 440-448

Em seleção genômica (SG), o grande número de marcadores moleculares utilizados, bem como a demanda computacional dos modelos bayesianos, fundamentados nos algoritmos Monte Carlo Via Cadeias de Markov, faz ... [more ▼]

Em seleção genômica (SG), o grande número de marcadores moleculares utilizados, bem como a demanda computacional dos modelos bayesianos, fundamentados nos algoritmos Monte Carlo Via Cadeias de Markov, faz com que as análises exijam semanas ou até meses de processamento. A computação paralela representa uma solução natural para este problema, visto que esta subdividi um algoritmo em várias tarefas independentes, as quais podem ser processadas em paralelo, reduzindo o tempo de processamento. Objetivou-se comparar a eficiência de processamento do método BayesCπ programado em paralelo com o seu algoritmo sequencial padrão. Duas estratégias de paralelização foram estudadas. A primeira envolveu a análise de múltiplas cadeias MCMC em paralelo, e a segunda referiu-se à paralelização de uma única cadeia MCMC. Utilizou-se a biblioteca MPI e o pacote OpenMPI associado ao compilador gfortran para execução em paralelo desses algoritmos. Foram utilizados dados simulados considerando 10.000 marcadores SNPs e 4.100 indivíduos. O algoritmo sequencial padrão foi processado em 77,29 horas. Ao usar múltiplas cadeias em paralelo o processamento foi 77% mais rápido (17,75hs), enquanto que a estratégia de paralelização de uma única cadeia apresentou um ganho de desempenho de 15% (65,37hs). Conclui-se que a computação paralela é eficiente e pode ser aplicada à SG. [less ▲]

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See detailLa carte conceptuelle en séance collective d'éducation thérapeutique du patient : quelles condirtions d'utilisation et quels effets ?
Yvon Divré, Anthony; Leclercq, Dieudonné ULiege; Marchand, Claire

in Education Thérapeutique du Patient [=ETP] = Therapeutic Patient Education [=TPE] (2017), 9(10103),

Résumé - Introduction : A l’origine, les cartes conceptuelles ont été conçues pour faciliter l’apprentissage des étudiants en les aidant à organiser leurs connaissances sous la forme de schémas. Or, dans ... [more ▼]

Résumé - Introduction : A l’origine, les cartes conceptuelles ont été conçues pour faciliter l’apprentissage des étudiants en les aidant à organiser leurs connaissances sous la forme de schémas. Or, dans le domaine de l’ETP, elles sont principalement utilisées dans un but d’évaluation pour un diagnostic éducatif ou en fin d’éducation, et moins souvent comme technique d’aide à l’apprentissage. Objectifs : L’étude vise à : (1) évaluer les effets d’un mode d’utilisation des cartes conceptuelles, en petit groupes et en pratique courante ; (2) à partir des données, réfléchir aux conditions qui pourraient faciliter ou limiter leur utilisation. Méthodes : Sept groupes de maximum 5 patients ont bénéficié d’une séance d’une durée d’une heure selon la méthode habituelle (N=30) et sept autres groupes avec la technique de la carte conceptuelle (N=29). Les connaissances des patients ont été évaluées avant (PRE) et le lendemain de la séance (POST) à l’aide d’un test qui comportait 30 questions Vrai-Faux avec degrés de certitude (15 questions de connaissance, 6 de jugement portant sur des menus et 9 relevant de 3 mini situations problèmes requérant des décisions). La satisfaction des patients a été évaluée par questionnaire et la perception des animatrices par l’utilisation d’un journal de bord et lors d’un entretien collectif. Résultats : Le pourcentage de Réponses Correctes (%RC) au test a augmenté dans les deux ensembles de groupes (gain 5%, gain relatif 17,6%) sans différence statistiquement significative (à P.05) entre les deux ensembles. Les gains sont plus importants pour les questions de connaissance (gain relatif 28,8%) que pour celles sur les situations problèmes (14,4%) et sur les menus (2,8%). Les degrés de certitude mettent en évidence que les réponses nuisibles (erreurs avec certitude élevée), aux alentours de 20% au départ, n’ont pas régressé au post-test. Diverses hypothèses sont avancées pour expliquer ces résultats. Les taux de satisfaction des patients vis-à-vis de la séance d’éducation sont supérieurs à 89% quelle que soit la méthode utilisée. Les groupes animés avec la carte conceptuelle ainsi que les animatrices ont souligné l’intérêt de celle-ci pour hiérarchiser et clarifier les connaissances. La qualité de la formation à la technique des cartes conceptuelles constitue une des principales conditions pour leur utilisation. Conclusion : Des principes sont proposés pour guider de nouvelles recherches destinées à vérifier dans quelles conditions l’utilisation de la carte conceptuelle comme technique pédagogique en ETP améliore la capacité de résolution de problème. [less ▲]

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See detailL’EXPRESSION DES CONVICTIONS RELIGIEUSES DANS LES RELATIONS DE TRAVAIL
Kéfer, Fabienne ULiege

in Revue de Droit Social = Tijdschrift voor Sociaal Recht (2017), (3), 527-583

This article explores the way in which Belgian law deals with situations where labour law engages with the right to freedom of religion and belief and the right not to be discriminated on grounds of ... [more ▼]

This article explores the way in which Belgian law deals with situations where labour law engages with the right to freedom of religion and belief and the right not to be discriminated on grounds of religion. It starts with the Belgian regime of religious freedom, protection against discrimination and valid reasons for termination of employment. It then considers specific areas of those regimes in Belgian labour relations, such as the work schedule accommodation, the refusal to perform work, clothing and religious symbols in the workplace, and the work in an ethos organization. It relates mainly to Belgian case law but also to the case law of the European courts. [less ▲]

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See detailHammerstein kernels identification by means of a sine sweep technique applied to nonlinear audio devices emulation
Schmitz, Thomas ULiege; Embrechts, Jean-Jacques ULiege

in Journal of the Audio Engineering Society (2017), 65(9), 696-710

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See detailGéopolitique et géostratégie, quand théories et recommandations se confondent
Regnier, Cindy ULiege

in Revue de Droit (2017), 2

Au 19e siècle Mackinder définit une dichotomie entre land et sea powers. D’après l’auteur, ces deux entités sont destinées à s’opposer et entrer compétition pour le Heartland, zone de terre étendue et non ... [more ▼]

Au 19e siècle Mackinder définit une dichotomie entre land et sea powers. D’après l’auteur, ces deux entités sont destinées à s’opposer et entrer compétition pour le Heartland, zone de terre étendue et non accessible par la mer. Ce Heartland, situé sur une grande partie du territoire russe et s’étendant en Asie centrale, est actuellement toujours au cœur des tensions entre les grandes puissances. Ainsi des théoriciens tant américains que russes vont reprendre les théories de Mackinder pour analyser mais aussi conseiller la politique étrangère de leurs États. Dès lors, ces auteurs vont appuyer l’importance pour leurs États de maintenir ou reprendre l’hégémonie sur le Heartland. Cet article se penche donc sur l’utilisation, par des académiques contemporains, de la théorie de Mackinder et les recommandations qui en découlent. Nous argumentons que ces recommandations inciteraient les États à émettre des actions qui confirmeraient de facto la théorie et conduiraient dès lors à une escalade de tension entre les États. [less ▲]

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See detailThe use of behavioural metrics to evaluate fishway efficiency
Ovidio, Michaël ULiege; Sonny, Damien; Dierckx, Arnaud ULiege et al

in River Research & Applications (2017), 33(9), 1484-1493

Fishways are installed worldwide to facilitate accessibility to functional habitats and to increase the ecological continuity of rivers. Their evaluations are increasing, but complete studies in the field ... [more ▼]

Fishways are installed worldwide to facilitate accessibility to functional habitats and to increase the ecological continuity of rivers. Their evaluations are increasing, but complete studies in the field with wild individuals are still scarce. In the lower Bocq River (Belgium), a pool type fishway was installed in 2011. A combined passive‐integrated‐transponder‐tag and radio‐telemetry system was designed and installed downstream of the dam and in the fishway to analyse fine‐scale individual fish behaviour. Three fish species (brown trout, European grayling, and barbel) were captured in the river; n = 125 fish were tagged and released downstream of the fishway. Behavioural metrics were proposed and used in order to attain a comprehensive view on the efficiency of the fishway, including attraction and entrance efficiency, searching and passage delays, and overall and adjusted passage efficiency. The results indicate a major problem in terms of attraction efficiency (48.9% for the trout, 20.5% for the grayling, and 41.2% for the barbel) and time to find the entrance of the fishway (mean 65.1 hr for the trout and 538.9 r for the grayling). For fish that succeed to approach the entrance of the fishway, the passage efficiency was 86.9% for the trout, 55.5% for the grayling, and 7.1% for the barbel. The time taken to cross the structure was reasonable for the salmonids (mean < 1.5 hr for trout and grayling) but very long (21 hr) for the barbel. Our results underline the necessity of a holistic approach to evaluate fishway efficiency using precise comprehensive metrics and hydraulic characterization. [less ▲]

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See detailPerformance correlations for characterizing the optimal off-design operation of an ORC power system
Dickes, Rémi ULiege; Dumont, Olivier ULiege; Quoilin, Sylvain ULiege et al

in Energy Procedia (2017), 129

The goal of this work is to develop a set of simple correlations in order to characterize the optimal off-design performance of an ORC power system. To this end, a 2kWe ORC test rig is investigated as ... [more ▼]

The goal of this work is to develop a set of simple correlations in order to characterize the optimal off-design performance of an ORC power system. To this end, a 2kWe ORC test rig is investigated as case study and a validated off-design model is used to assess the highest net power generation achievable by the system over its complete range of operating conditions. The off-design model employed is charge-sensitive (i.e. it imposes the total mass of refrigerant in the system) which permits to predict the ORC state (i.e. its pressures, temperatures, mass flow rates, subcooling, etc.) based on the system boundary conditions only. Since such modelling approach and optimization process are time-consuming, a set of simple analytical equations is developed so as to easily predict the optimal performance of the ORC systems. [less ▲]

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See detailTraumatologie des sports olympiques de ballon en salle. Partie 2 : le handball
Kaux, Jean-François ULiege; Roberjot, Mathieu; DELVAUX, François ULiege et al

in Journal de Traumatologie du Sport (2017)

Frequent often-rough contact between players explains why handball has one of the highest injury rates (mainly contusion) recorded at the LondonOlympic Games. Ankle injuries predominated. Head injuries ... [more ▼]

Frequent often-rough contact between players explains why handball has one of the highest injury rates (mainly contusion) recorded at the LondonOlympic Games. Ankle injuries predominated. Head injuries (commotion), shoulder injuries (dislocation and instability), and knee injuries (anteriorcruciate ligament tears) were also common. Wingmen are in constant activity both as attackers and defenders, making them the players with thehighest risk of injury. [less ▲]

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See detailFaut-il génotyper « nos bonnes vaches » ? Une approche de la génomique par les contradictions
Mougenot, Catherine ULiege; Gaillard, Claire

in VertigO : la Revue Electronique en Sciences de l'Environnement (2017), 17(2),

Thanks to a blood sample, Marker-Assisted Selection (MAS) estimates the value of a livestock genetic potential. This technique is proposed as a new means to improve genetic progress. In this paper, we ... [more ▼]

Thanks to a blood sample, Marker-Assisted Selection (MAS) estimates the value of a livestock genetic potential. This technique is proposed as a new means to improve genetic progress. In this paper, we follow this so-called « third revolution » in cattle breeding through a qualitative study in the region where the « Montbeliard » race originates from (Jura and Doubs districts in France). All the farmers and inseminators we met are consistently and simultaneously favourable and reluctant to the introduction of such genomic tools. While MAS challenges their current practices, each of them also tries to assess its possible benefits. These underlying contradictions are the red wire of this investigation. Instead of considering such contradictions as a cognitive deficit, we analyse them as signs of hesitations and tensions and henceforth consider them as clues about the possible consequences of an ongoing innovation. [less ▲]

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See detailLong-Term Care Insurance and Intra-family Moral Hazard: Fixed vs Proportional Insurance Benefits
Klimaviciute, Justina ULiege

in GENEVA Risk & Insurance Review (2017), 42(2), 87-116

Pauly (1990) argues that an explanation for the low long-term care (LTC) insurance demand could be intra-family moral hazard: parents might refuse to buy insurance since it reduces children’s incentives ... [more ▼]

Pauly (1990) argues that an explanation for the low long-term care (LTC) insurance demand could be intra-family moral hazard: parents might refuse to buy insurance since it reduces children’s incentives to provide care. This paper raises and explores the idea that the extent of intra-family moral hazard and non-purchase of LTC insurance might differ when insurance benefits are fixed and when they are proportional to LTC expenditures. It shows that fixed benefits limit and might even eliminate intra-family moral hazard, while the effect of proportional benefits is at best ambiguous. Consequently, non-purchase of insurance is less likely with fixed benefits. [less ▲]

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See detailNew computational method of the ball/race contacts transverse loads of high speed ball bearings without race control hypothesis
Servais, Christophe ULiege; Bozet, Jean-Luc ULiege

in Tribology International (2017), 113

Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the transverse loads within ball/race ... [more ▼]

Some hypotheses are still necessary in order to access the ball bearing Newtonian equilibrium with quasi-static methods. Among these hypotheses are the values of the transverse loads within ball/race contacts. Those loads are due to the gyroscopic torques. Nowadays, the transverse loads are estimated without any equilibrium criterion by the specialized literature. Moreover, the race control assumption is often employed in addition to the hypotheses made about the transverse loads. The paper describes a new method to compute the transverse loads without using the race control assumption. Then, a correlation between the ball bearing kinematics and the transverse loads is established. It leads to an accurate and efficient computational method to access the Newtonian equilibrium of high speed ball bearings. [less ▲]

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See detailConsidering Rich Spatiotemporal Relationships in Cultural Heritage Information Management
Hallot, Pierre ULiege

in Lecture Notes in Geoinformation and Cartography (2017)

This paper describes the use of rich spatiotemporal relationships in cultural heritage information modelling in order to increase the information organization and extraction. The idea is to tailor the ... [more ▼]

This paper describes the use of rich spatiotemporal relationships in cultural heritage information modelling in order to increase the information organization and extraction. The idea is to tailor the spatiotemporal state of identity model, i.e. a model based on spatiotemporal identity that takes into account relationships between non-existing and non-presents objects, to the management cultural heritage information. In doing so, we propose an enhancement of the knowledge representation for cultural heritage. [less ▲]

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See detailComprehensive volatile metabolic fingerprinting of bacterial and fungal pathogen groups
Rees, Christiaan; Burklund, Alison; Stefanuto, Pierre-Hugues ULiege et al

in Journal of Breath Research (2017)

The identification of pathogen-specific volatile metabolic "fingerprints" could lead to the rapid identification of disease-causing organisms either directly from <i>ex vivo</i> patient bio ... [more ▼]

The identification of pathogen-specific volatile metabolic "fingerprints" could lead to the rapid identification of disease-causing organisms either directly from <i>ex vivo</i> patient bio-specimens or from <i>in vitro</i> cultures. In the present study, we have evaluated the volatile metabolites produced by 100 clinical isolates belonging to ten distinct pathogen groups that, in aggregate, account for 90 % of bloodstream infections, 90 % of urinary tract infections, and 80 % of infections encountered in the intensive care unit setting. Headspace volatile metabolites produced in vitro were concentrated using headspace solid-phase microextraction and analyzed via two-dimensional gas chromatography time-of-flight mass spectrometry (HS-SPME-GC×GC-TOFMS). A total of 811 volatile metabolites were detected across all samples, of which 203 were: 1) detected in 9 or 10 (of 10) isolates belonging to one or more pathogen groups, and 2) significantly more abundant in cultures relative to sterile media. Network analysis revealed a distinct metabolic fingerprint associated with each pathogen group, and analysis via Random Forest (RF) using leave-one-out cross-validation (LOOCV) resulted in a 95 % accuracy for the differentiation between groups. The present findings support the results of prior studies that have reported on the differential production of volatile metabolites across pathogenic bacteria and fungi, and provide additional insight through the inclusion of pathogen groups that have seldom been studied previously, including <i>Acinetobacter</i> spp., coagulase-negative <i>Staphylococcus</i>, and <i>Proteus mirabilis</i>, as well as the utilization of HS-SPME-GC×GC-TOFMS for improved sensitivity and resolution relative to traditional gas chromatography-based techniques. [less ▲]

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See detailExpérience Tawada, Expérience inédite
Goto, Kanako ULiege

in Mixed Zone : Passages (2017)

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See detailModeling structures in fire with SAFIR®: Theoretical background and capabilities
Franssen, Jean-Marc ULiege; Gernay, Thomas ULiege

in Journal of Structural Fire Engineering (2017), 8(3), 300-323

Purpose: This paper describes the theoretical background and main hypotheses at the basis of SAFIR®, a nonlinear finite element software for modeling structures in fire. The paper also explains how to use ... [more ▼]

Purpose: This paper describes the theoretical background and main hypotheses at the basis of SAFIR®, a nonlinear finite element software for modeling structures in fire. The paper also explains how to use the software at its full extent. The discussed numerical modeling principles can be applied with other similar software. Approach: Following a general overview of the organization of the software, the thermal analysis part is explained, with the basic equations and the different possibilities to apply thermal boundary conditions (compartment fire, localized fire, etc.). Next, the mechanical analysis part is detailed, including the time integration procedures and the different types of finite elements: beam, truss, shell, spring and solid. Finally, the material laws are described. The software capabilities and limitations are discussed throughout the paper. Findings: By accommodating multiple types of finite elements and materials, by allowing the user to consider virtually any section type and to input the fire attack in multiple forms, the software SAFIR® is a comprehensive tool for investigating the behavior of structures in the fire situation. Meanwhile, being developed exclusively for its well-defined field of application, it remains relatively easy to use. Value: The paper will improve the knowledge of readers (researchers, designers and authorities) about numerical modeling used in structural fire engineering in general and the capabilities of a particular software largely used in the fire engineering community. [less ▲]

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See detailSunlight irradiance and habituation of visual evoked potentials in migraine: The environment makes its mark
Lisicki Martinez, Marco ULiege; D'Ostilio, Kevin; Erpicum, Michel ULiege et al

in Cephalalgia : An International Journal of Headache (2017)

Background Migraine is a complex multifactorial disease that arises from the interaction between a genetic predisposition and an enabling environment. Habituation is considered as a fundamental adaptive ... [more ▼]

Background Migraine is a complex multifactorial disease that arises from the interaction between a genetic predisposition and an enabling environment. Habituation is considered as a fundamental adaptive behaviour of the nervous system that is often impaired in migraine populations. Given that migraineurs are hypersensitive to light, and that light deprivation is able to induce functional changes in the visual cortex recognizable through visual evoked potentials habituation testing, we hypothesized that regional sunlight irradiance levels could influence the results of visual evoked potentials habituation studies performed in different locations worldwide. Methods We searched the literature for visual evoked potentials habituation studies comparing healthy volunteers and episodic migraine patients and correlated their results with levels of local solar radiation. Results After reviewing the literature, 26 studies involving 1291 participants matched our inclusion criteria. Deficient visual evoked potentials habituation in episodic migraine patients was reported in 19 studies. Mean yearly sunlight irradiance was significantly higher in locations of studies reporting deficient habituation. Correlation analyses suggested that visual evoked potentials habituation decreases with increasing sunlight irradiance in migraine without aura patients. Conclusion Results from this hypothesis generating analysis suggest that variations in sunlight irradiance may induce adaptive modifications in visual processing systems that could be reflected in visual evoked potentials habituation, and thus partially account for the difference in results between studies performed in geographically distant centers. Other causal factors such as genetic differences could also play a role, and therefore well-designed prospective trials are warranted. [less ▲]

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See detailEnjeux de la notion de genre en sémiotique
Badir, Sémir ULiege

in Semiotica (2017)

What is a genre? Applied to the textual domain, this question has received a descriptive answer in language studies. Genres would thus be dis- tinguished from one another through formal (syntactic and ... [more ▼]

What is a genre? Applied to the textual domain, this question has received a descriptive answer in language studies. Genres would thus be dis- tinguished from one another through formal (syntactic and lexical) traits and specific enunciative markers, as well as through the specificities of punctuation on the layout. Such response presupposes a global model where genres assem- ble texts (that actually undergo analysis) and are in turn integrated into dis- course. I question this model in the name of empiricism: genres, as governed by usage, do not allow for such integration. Genres are heterogeneous by nature and their description cannot be rigid. The reason is that genres are a product of a certain type of interpretative practice of texts and, beyond texts, of all sorts of works. The aim of this study is to show how genre is the categorization that corresponds to a hermeneutics of appropriation and, in this sense, is reluctant to being disclosed through a formal description. Greimas seems never to have doubted this, since his semiotic project was precisely centered in the neutraliza- tion of generic categories. [less ▲]

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See detailCommunication of healthcare professionals: is there ageism?
Schroyen, Sarah ULiege; Adam, Stéphane ULiege; Marquet, Manon ULiege et al

in European Journal of Cancer Care (2017)

Elderspeak is often used when talking to older individuals and is characterized by a slower and/or louder speech, a patronizing tone, etc. A part of the reason of such communication can be found in the ... [more ▼]

Elderspeak is often used when talking to older individuals and is characterized by a slower and/or louder speech, a patronizing tone, etc. A part of the reason of such communication can be found in the actual context of negative view of aging. However, the link between view of aging and elderspeak has never been objectively studied in oncology. Therefore, 40 healthcare professionals (physicians and medical students) record a podcast where they have to explain an endocrine therapy to two fictional patients (40 vs 70 years old). Results show that when participants explained the treatment to the older patient, they used shorter utterances and made more repetitions. They also evoked fewer side effects such as sexual issues. Moreover, reduction of length of utterances and of word-per-minute rate was observed for older patient when participants have a positive view of aging but for both patients when they have a negative view of aging. In conclusion, physicians and medical students used elderspeak when they explained a treatment to older patients. Participants with a more negative view of aging also unconsciously talked slower and made shorter utterances to a 40 year-old patient. [less ▲]

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See detailEvaluating Model Simulations of Twentieth-Century Sea Level Rise. Part 2: Regional Sea-Level Changes
Meyssignac, B.; Slangen, A.; Melet, A. et al

in Journal of Climate (2017), in press

Twentieth century regional sea-level changes are estimated from 12 climate models from the 5th phase of the Climate Model Intercomparison Project (CMIP5). The output of the CMIP5 climate model simulations ... [more ▼]

Twentieth century regional sea-level changes are estimated from 12 climate models from the 5th phase of the Climate Model Intercomparison Project (CMIP5). The output of the CMIP5 climate model simulations were used to calculate the global and regional sea-level changes associated with dynamic sea level, atmospheric loading, glacier mass changes and ice sheet surface mass balance contributions. The contribution from groundwater depletion, reservoir storage and dynamic ice sheet mass changes are estimated from observations as they are not simulated by climate models. All contributions are summed, including the GIA contribution, and compared to observational estimates from 27 tide gauge records over the twentieth century (1900-2015). We find a general agreement between the simulated sea level and tide gauge records in terms of inter-annual to multi-decadal variability over 1900-2015. But climate models tend to systematically underestimate the observed sea-level trends, particularly in the first half of the 20th century. The corrections based on attributable biases between observations and models that have been identified in the part-1-paper, result in an improved explanation of the spatial variability in observed sea-level trends by climate models. Climate models show that the spatial variability in sea-level trends observed by tide-gauge records is dominated by the GIA contribution and the steric contribution over 1900-2015. Climate models also show that it is important to include all contributions to sea-level changes as they cause significant local deviations; for example, the groundwater depletion around India which is responsible for the low 20th century sea-level rise in the region. [less ▲]

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See detailFusion-based Additive Manufacturing for Processing Aluminum Alloys: State-of-the-Art and Challenges
Mertens, Anne ULiege; Delahaye, Jocelyn ULiege; Lecomte-Beckers, Jacqueline ULiege et al

in Advanced Engineering Materials (2017), 19(8), 1700003

Starting early 2015, the fusion-based additive manufacturing of Al alloys has been developing at an ever faster pace after undergoing a comparatively slow start with respect to other metallic materials ... [more ▼]

Starting early 2015, the fusion-based additive manufacturing of Al alloys has been developing at an ever faster pace after undergoing a comparatively slow start with respect to other metallic materials. This paper reviews the recent developments with the aim of identifying major challenges and opportunities for future work. Laser Beam Melting proves the most useful technique for the additive fabrication of Al components with strongly out-of-equilibrium microstructures and potentially enhanced mechanical behavior. Laser Cladding is also promising for specific applications such as repairs and coatings. However, a deeper understanding of the thermal history during fabrication is still needed to further optimize the microstructures and usage properties. The design of new high strength alloys and of Al-matrix composites, and the development of better adapted post-processing procedures to take greater advantage of the specificities of fusion-based additive techniques are two other important issues in view of reaching the full potential of additive Al components. [less ▲]

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See detailExperimental and theoretical investigation of SrFe12O19 nanopowder for permanent magnet application
Abraime, Brahim; Ait tamerd, Mohamed; Mahmoud, Abdelfattah ULiege et al

in Ceramics International (2017)

Strontium M-type hexagonal ferrites were synthesized at different calcination temperatures (800 °C, 1000 °C and 1100 °C) using sol-gel autocombustion method. Thermogravimetric analysis (TGA), X-ray ... [more ▼]

Strontium M-type hexagonal ferrites were synthesized at different calcination temperatures (800 °C, 1000 °C and 1100 °C) using sol-gel autocombustion method. Thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Mössbauer spectroscopy (MS) and superconducting quantum interference device magnetometer (SQUID) techniques were used to characterize crystal structure, phase composition, morphology and magnetic properties. TGA gives T = 800 °C as beginning of suitable calcination. Hexaferrite structure of single phase is obtained according to XRD results for all samples with crystallite size between 28 nm and 35 nm. SEM images show the growth of grain size with increasing of annealing temperature. (BH)max is calculated based on SQUID results and shows an enhancement between T = 800 °C and T = 1000 °C of 25%. The magnetic properties observed at low temperature are explained and confirmed by ab-initio calculations [less ▲]

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See detailSplit-Band Interferometry-Assisted Phase Unwrapping for the Phase Ambiguities Correction
Libert, Ludivine ULiege; De Rauw, Dominique ULiege; d'Oreye, Nicolas et al

in Remote Sensing (2017), 9(9),

Split-Band Interferometry (SBInSAR) exploits the large range bandwidth of the new generation of synthetic aperture radar (SAR) sensors to process images at subrange bandwidth. Its application to an ... [more ▼]

Split-Band Interferometry (SBInSAR) exploits the large range bandwidth of the new generation of synthetic aperture radar (SAR) sensors to process images at subrange bandwidth. Its application to an interferometric pair leads to several lower resolution interferograms of the same scene with slightly shifted central frequencies. When SBInSAR is applied to frequency-persistent scatterers, the linear trend of the phase through the stack of interferograms can be used to perform absolute and spatially independent phase unwrapping. While the height computation has been the main concern of studies on SBInSAR so far, we propose instead to use it to assist conventional phase unwrapping. During phase unwrapping, phase ambiguities are introduced when parts of the interferogram are separately unwrapped. The proposed method reduces the phase ambiguities so that the phase can be connected between separately unwrapped regions. The approach is tested on a pair of TerraSAR-X spotlight images of Copahue volcano, Argentina. In this framework, we propose two new criteria for the frequency-persistent scatterers detection, based respectively on the standard deviation of the slope of the linear regression and on the phase variance stability, and we compare them to the multifrequency phase error. Both new criteria appear to be more suited to our approach than the multifrequency phase error. We validate the SBInSAR-assisted phase unwrapping method by artificially splitting a continuous phase region into disconnected subzones. Despite the decorrelation and the steep topography affecting the volcanic test region, the expected phase ambiguities are successfully recovered whatever the chosen criterion to detect the frequency-persistent scatterers. Comparing the aspect ratio of the distributions of the computed phase ambiguities, the analysis shows that the phase variance stability is the most efficient criterion to select stable targets and the slope standard deviation gives satisfactory results. [less ▲]

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See detailPreservation protocol for dimethylsulfoniopropionate and dimethylsulfoxide analysis in plant material of the Mediterranean seagrass Posidonia oceanica, and re-evaluation of dimethylsulfoniopropionate leaf content
Borges, Alberto ULiege; Champenois, Willy ULiege

in Aquatic Botany (2017), 143C

We tested three treatments to preserve Posidonia oceanica leaves for the analysis of dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO): oven dried at 60 °C for 24 h, frozen at −20 °C, and ... [more ▼]

We tested three treatments to preserve Posidonia oceanica leaves for the analysis of dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO): oven dried at 60 °C for 24 h, frozen at −20 °C, and frozen-in-ice and kept at −20 °C. The DMSP content was analyzed by proxy as dimethylsulfide (DMS) by gas chromatography after alkaline cleavage at room-temperature. The DMSP leaf content of P. oceanica in samples that were oven dried at 60 °C for 24 h, then stored at room temperature decreased by 87% over 80 days of storage and then remained stable for about 88 additional days compared to the control. The DMSO leaf content of P. oceanica in samples that were oven dried increased nine-fold after 198 days of storage following drying compared to the control. Both the DMSP and DMSO leaf content of P. oceanica remained stable for 198 days compared to the control with frozen and frozen-in-ice treatments, which we both recommend as adequate protocols to preserve P. oceanica tissues for DMS(P,O) analysis. The annual average DMSP leaf content of P. oceanica at 10 m in the Bay of Calvi (Corsica, France) was 205 ± 58 μmol g−1 (fresh weight) based on samples preserved frozen, two orders of magnitude higher than the value we previously reported based on samples that were oven dried. The newly determined DMSP leaf content allows ranking P. oceanica as the highest DMSP producer reported to date among marine and inter-tidal autotrophs. [less ▲]

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See detailNanofitin as a New Molecular-Imaging Agent for the Diagnosis of 2 Epidermal Growth Factor Receptor Over-Expressing Tumors.
Goux, Marine; Becker, Guillaume ULiege; Gorré, Harmony et al

in Bioconjugate Chemistry (2017), 28(9), 2361-2371

Epidermal growth-factor receptor (EGFR) is involved in cell growth and proliferation and is over-expressed in malignant tissues. Although anti-EGFR-based immunotherapy became a standard of care for ... [more ▼]

Epidermal growth-factor receptor (EGFR) is involved in cell growth and proliferation and is over-expressed in malignant tissues. Although anti-EGFR-based immunotherapy became a standard of care for patients with EGFR-positive tumors, this strategy of addressing cancer tumors by targeting EGFR with monoclonal antibodies is less-developed for patient diagnostic and monitoring. Indeed, antibodies exhibit a slow blood clearance, which is detrimental for positron emission tomography (PET) imaging. New molecular probes are proposed to overcome such limitations for patient monitoring, making use of low-molecular-weight protein scaffolds as alternatives to antibodies, such as Nanofitins with better pharmacokinetic profiles. Anti-EGFR Nanofitin B10 was reformatted by genetic engineering to exhibit a unique cysteine moiety at its C-terminus, which allows the development of a fast and site-specific radiolabeling procedure with 18F−4-fluorobenzamido-N-ethylamino-maleimide (18F−FBEM). The in vivo tumor targeting and imaging profile of the anti-EGFR Cys−B10 Nanofitin was investigated in a double-tumor xenograft model by static small-animal PET at 2 h after tail-vein injection of the radiolabeled Nanofitin 18F−FBEM−Cys−B10. The image showed that the EGFR- positive tumor (A431) is clearly delineated in comparison to the EGFR-negative tumor (H520) with a significant tumor-to-background contrast. 18F−FBEM−Cys−B10 demonstrated a significantly higher retention in A431 tumors than in H520 tumors at 2.5 h post-injection with a A431-to-H520 uptake ratio of 2.53 ± 0.18 and a tumor-to-blood ratio of 4.55 ± 0.63. This study provides the first report of Nanofitin scaffold used as a targeted PET radiotracer for in vivo imaging of EGFR-positive tumor, with the anti-EGFR B10 Nanofitin used as proof-of-concept. The fast generation of specific Nanofitins via a fully in vitro selection process, together with the excellent imaging features of the Nanofitin scaffold, could facilitate the development of valuable PET-based companion diagnostics. [less ▲]

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See detailMicrobiological stability of rice tart stored at ambient temperature after baking
N'guessan, Elise; Cissé, Mohamed; Niyonzima, Eugene ULiege et al

in Journal of Food Research (2017), 6(5), 41-49

Very popular in Belgium, rice tart is a hot pastry sold in bakeries. It is then consumed at home, for dessert or snack. This study is conducted to investigate the microbiological stability of this ... [more ▼]

Very popular in Belgium, rice tart is a hot pastry sold in bakeries. It is then consumed at home, for dessert or snack. This study is conducted to investigate the microbiological stability of this foodstuff, from the end of baking to end user by consumers. In this purpose, 108 rice tart samples were collected from each of seven bakeries in five Belgium provinces. Physico-chimical analysis in addition to microbiological analysis were carried out in accordance with the European Regulation EC 2073/2005 and with references methods, to enumerate the total microorganisms count, Staphylococcus aureus, Bacillus cereus as well as Enterobacteria, susceptible likely to contaminate the tarts during the production or after baking. Even when the results meet the microbiological safety standards immediately after baking in all bakeries implicated, a significant (p <0,05) increase of mesophilic aerobic bacteria (ranging from <1 to 7 log cfu/g) and B. cereus (> 3,7 log cfu/g) was observed during the storage at non refrigerated temperature (28 to 30°C). A post-baking recontamination and other parameters like an insufficient baking time or a non uniform distribution of the oven heat could explain the observed bacteria growth. The present study shows that most rice tarts investigated are microbiologically safe. However, the possible increase of bacteria load in this foodstuff attributable to the favorable aw, pH and temperature conditions, highlight the importance of applying good hygienic practices and compliance with storage conditions after baking to ensure consumer safety. [less ▲]

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See detailCO2-sourced α-alkylidene cyclic carbonates: a Step forward in the quest for functional regioregular poly(urethane)s and poly(carbonate)s
Gennen, Sandro ULiege; Grignard, Bruno ULiege; Tassaing, Thierry et al

in Angewandte Chemie International Edition (2017), 56(35), 1039410398

We describe a robust platform for the synthesis of a large diversity of novel functional CO2 -sourced polymers by exploiting the regio-controlled and site selective ring-opening of α- alkylidene ... [more ▼]

We describe a robust platform for the synthesis of a large diversity of novel functional CO2 -sourced polymers by exploiting the regio-controlled and site selective ring-opening of α- alkylidene carbonates by various nucleophiles. The remarkable reactivity of α-alkylidene carbonates is dictated by the exocyclic olefinic group that selectively orients the cyclic carbonate ring- opening with the formation of an enol species. The polyaddition of CO2 -sourced bis-α-alkylidene carbonates (bis-αCCs) with primary and secondary diamines provides novel regioregular functional poly(urethane)s. The reactivity of bis-αCCs is also exploited for producing new poly(β-oxo-carbonate)s by organocatalyzed polyaddition with a diol. All polyadditions were feasible under ambient conditions. This synthesis platform provides new functional variants of world-class leading polymers families (polyurethanes, polycarbonates) and valorises CO2 as a chemical feedstock. [less ▲]

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See detailIn vivo chlorophyll fluorescence screening allows the isolation of a Chlamydomonas mutant defective for NDUFAF3, an assembly factor involved in mitochondrial complex I assembly
Massoz, Simon; Hanikenne, Marc ULiege; Bailleul, Benjamin et al

in Plant Journal (The) (2017), 17(8), 2045-2054

The qualitative screening method to select complex I mutants in the microalga Chlamydomonas, based on reduced growth under heterotrophic condition, is not suited for high throughput screening. In order to ... [more ▼]

The qualitative screening method to select complex I mutants in the microalga Chlamydomonas, based on reduced growth under heterotrophic condition, is not suited for high throughput screening. In order to develop a fast screening method based on measurements of chlorophyll fluorescence, we first demonstrated that complex I mutants displayed decreased photosystem II efficiency in the genetic background of a photosynthetic mutation leading to reduced formation of the electrochemical proton gradient in the chloroplast (pgrl1 mutation). In contrast, single mutants (complex I and pgrl1 mutants) could not be distinguished from wild type by their photosystem II efficiency in the tested conditions. We next performed an insertional mutagenesis on the pgrl1 mutant. Out of ~3000 hygromycin-resistant insertional transformants, 46 had decreased photosystem II efficiency and three were complex I mutants. One of the mutants was tagged and whole genome sequencing identified the resistance cassette in NDUFAF3, a homolog of the human NDUFAF3 gene, encoding for an assembly factor involved in complex I assembly. Complemented strains showed restored complex I activity and assembly. Overall, we described here a screening method which is fast and particularly suited for identification of Chlamydomonas complex I mutants. [less ▲]

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See detailEffect of AP102, a subtype 2 and 5 specific somatostatin analog, on glucose metabolism in rats
Tarasco, Erika; Seebeck, Petra; Pfundstein, Svende et al

in Endocrine (2017)

Somatostatin analogs are widely used to treat conditions associated with hormonal hypersecretion such as acromegaly and metastatic neuroendocrine tumors. First generation somatostatin analogs, such as ... [more ▼]

Somatostatin analogs are widely used to treat conditions associated with hormonal hypersecretion such as acromegaly and metastatic neuroendocrine tumors. First generation somatostatin analogs, such as octreotide and lanreotide, have high affinity for somatostatin receptor subtype 2 (SSTR2), but have incomplete efficacy in many patients. Pasireotide targets multiple SSTRs, having the highest affinity for SSTR5, but causes hyperglycemia and diabetes mellitus in preclinical and clinical studies. AP102 is a new somatostatin analogs with high affinity at both SSTR2 and SSTR5. We aimed to characterize the effects of AP102 vs. pasireotide on random and dynamic glucose levels, glucoregulatory hormone concentrations and growth axis measures in healthy Sprague-Dawley rats. [less ▲]

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See detailSupercritical Fluid Chromatography in Traditional Chinese Medicine Analysis
Huang, Yang ULiege; Tang, Guangyun; Zhang, Tingting et al

in Journal of Pharmaceutical and Biomedical Analysis (2017)

Traditional Chinese medicines (TCMs) are gaining increasing popularity throughout the world due to their long historical clinical practices. Highly efficient analytical separation tools are essential for ... [more ▼]

Traditional Chinese medicines (TCMs) are gaining increasing popularity throughout the world due to their long historical clinical practices. Highly efficient analytical separation tools are essential for investigating the mysterious properties of TCMs and their quality control. Supercritical fluid chromatography (SFC) showed a great potential in TCM analysis for both nonpolar and polar components. In this paper, an overview of the experimental conditions (i.e. detection mode, stationary phase, mobile phase composition, pressure and temperature) used in SFC for achiral separations of TCM components is presented and recent applications to the analysis of different classes of compounds extracted from TCMs, such as lipids, terpene and terpenoids, phenolic compounds, flavonoids, alkaloids, saponins and carbohydrates, will be briefly described. [less ▲]

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See detailComplete mitogenome sequence of Ricasolia amplissima (Lobariaceae) reveals extensive mitochondrial DNA rearrangement within the Peltigerales (lichenized ascomycetes)
Simon, Antoine ULiege; Liu, Yang; Sérusiaux, Emmanuël ULiege et al

in Bryologist (2017), 120(3), 335-339

The structure of mitochondrial genomes varies among non-lichenized fungi in terms of their genic and intronic content and genic order. Whether lichenized fungal mitogenomes are equally labile is unknown ... [more ▼]

The structure of mitochondrial genomes varies among non-lichenized fungi in terms of their genic and intronic content and genic order. Whether lichenized fungal mitogenomes are equally labile is unknown due to the paucity of available mitogenomes. We assembled the mitogenome of Ricasolia amplissima (Peltigerales, Lobariaceae), using massive parallel sequencing, and compared its structure to that of two species of Peltigera (Peltigeraceae). The mitochondrial genome of R. amplissima comprised 82,333 bp, with a 29.8% G+C content, and holds 15 unique protein-coding genes, 29 tRNA genes, two rRNA genes, and one non-coding RNA gene. Although the protein-coding gene content in the mitogenome of Peltigera and Ricasolia was identical, the relative gene order differed substantially, revealing that significant gene rearrangements also characterize the evolution of mitogenomes of lichenized ascomycetes at a relatively shallow phylogenetic depth, such as within the order Peltigerales. [less ▲]

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See detailProtein–polysaccharide complexes for enhanced protein delivery in hyaluronic acid templated calcium carbonate microparticles
Ramalapa, Bathabile ULiege; Crasson, Oscar ULiege; Vandevenne, Marylène ULiege et al

in Journal of Materials Chemistry B (2017), 5

The controlled delivery of proteins within calcium carbonate (CaCO3) particles is currently widely investigated. The success of these carriers is driven by ionic interactions between the encapsulated ... [more ▼]

The controlled delivery of proteins within calcium carbonate (CaCO3) particles is currently widely investigated. The success of these carriers is driven by ionic interactions between the encapsulated proteins and the particles. This poses a great limitation on the successful loading of proteins that have no ionic affinity to CaCO3. In this study, we explored the use of polysaccharide–protein interactions to strongly enhance the encapsulation of proteins in CaCO3 microparticles. Previously, Vandevenne and colleagues inserted a human chitin binding domain (ChBD) that has intrinsic affinity for hyaluronic acid (HA) into a β-lactamase (BlaP). This generated chimeric protein, named BlaPChBD, was shown to be fully bifunctional. In this study we showed that this hybrid protein can associate with HA and be successfully loaded into vaterite CaCO3 microparticles using supercritical CO2 (ScCO2) technology aided by the templating effect of HA on CaCO3. The presence of ChBD inserted into BlaP increased the encapsulation of the protein by 6-fold when complexed with HA. Furthermore, thrombin cleavage sites were engineered on both sides of the inserted ChBD in the chimeric BlaP to achieve release of the protein from the microparticles by protease cleavage. Our results showed that thrombin cleavage increased the release of the protein from the microparticles within 36 hours from <20% to 87%. In conclusion, the presence of ChBD successfully improved the encapsulation yield of the protein while retaining up to 82% of its activity and efficient release of the protein from the microparticles was achieved by protease cleavage. [less ▲]

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See detailLe cercle de lecture, un dispositif pour construire ensemble des compétences de lecteurs et d'enseignants
Scheepers, Caroline ULiege; Outers, Pierre ULiege; Werner, Anne-Catherine ULiege et al

in Didactiques en Pratique (2017)

Comment accompagner les premiers pas des stagiaires débutants ? À cette vaste et complexe question, le présent article envisage d’apporter un très modeste éclairage. Ainsi, sera décrit, conceptualisé ... [more ▼]

Comment accompagner les premiers pas des stagiaires débutants ? À cette vaste et complexe question, le présent article envisage d’apporter un très modeste éclairage. Ainsi, sera décrit, conceptualisé, analysé et discuté un projet collaboratif qui a associé étroitement théorie et pratique, université et école secondaire, expérimentation et transposition d’un dispositif, didactique disciplinaire et didactique générale. Plus concrètement, il s’est agi de faire expérimenter en tant qu’apprenants un cercle de lecture et un atelier d’écriture par les étudiants romanistes qui suivent le cours de première année de master centré sur la didactique du français langue première, avant de les inviter à transposer l’outil ainsi testé dans leur classe de stage. Seront prises en compte différentes traces : nos consignes, les journaux de stage, les portfolios, les consignes des étudiants, les traces recueillies auprès des élèves du secondaire, les rapports des maitres de stage, etc. Nous verrons in fine que le processus mis en place confirme, toutes proportions gardées, la validité et la pertinence du principe d’homologie entre les activités testées par les stagiaires lors de leur formation initiale à l’université et celles que les formateurs leur recommandent de mettre en œuvre dans leurs classes. [less ▲]

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See detail3D thermal finite element analysis of laser cladding processed Ti-6Al-4V part with microstructural correlations
Tran, Hoang Son ULiege; Tchuindjang, Jérôme Tchoufack ULiege; Paydas, Hakan ULiege et al

in Materials & Design (2017), 128

In this study, a 3D thermal model of laser cladding by powder injection applied to Ti-6Al-4V is developed. The manufactured part is made of a Ti-6Al-4V substrate on which successive layers of laser melted ... [more ▼]

In this study, a 3D thermal model of laser cladding by powder injection applied to Ti-6Al-4V is developed. The manufactured part is made of a Ti-6Al-4V substrate on which successive layers of laser melted powder are added, leading to a thick deposit. The computed temperature field and its time evolution are compared to experimental measurements. The temperature distribution in the substrate allows the prediction of the depths of the melt pool and the heat affected zone. Correlations between simulated thermal histories and the final microstructure in the thick deposit are established, leading to the enhancement of a dynamic shift of the critical transformation points due to high thermal rates during laser processing. The nature of the phases present within the deposit is discussed. [less ▲]

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See detailA central role for Type I IFN in Th2 response induction by dendritic cells
Webb, Lauren M.; Lundie, Rachel J.; Borger, Jessica G. et al

in EMBO Journal (2017), 36(16), 2404-2418

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See detailAdministrative Change in the EU: a Cross-Country Empirical Study on the Contextual Determinants of NPM Reform Rhetoric
Esposito, Giovanni ULiege; Gaeta, Giuseppe Lucio; Trasciani, Giorgia

in Annals of Public and Cooperative Economics (2017), 88(3), 323344

Framed within the paradigm of New Public Management (NPM), structural reforms in the EU aimed at modernizing the public administrations of Member States (MSs) have long since been a priority area of the ... [more ▼]

Framed within the paradigm of New Public Management (NPM), structural reforms in the EU aimed at modernizing the public administrations of Member States (MSs) have long since been a priority area of the EU’s economic policy. Since the 1990s, these reforms have been sharply intensified across European countries with the declared purpose of enhancing economy, efficiency and effectiveness in their national public sectors’ organizations. In line with the European Commission’s recent research initiatives in search for novel quantitative data on NPM in the EU, this paper studies European parties’ NPM reform rhetoric. More specifically, it investigates the MSs’ institutional, economic and political context within which parties have declared their intention of reforming national administrative systems. Thus, it sheds light on the MSs’ domestic factors that are associated with the diffusion of the NPM values across the political discourse of EU’s national parties. [less ▲]

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See detailSuperparamagnetic colloids in viscous fluids
Darras, Alexis ULiege; Opsomer, Eric ULiege; Vandewalle, Nicolas ULiege et al

in Scientific Reports (2017), 7

The influence of a magnetic field on the aggregation process of superparamagnetic colloids has been well known on short time for a few decades. However, the influence of important parameters, such as ... [more ▼]

The influence of a magnetic field on the aggregation process of superparamagnetic colloids has been well known on short time for a few decades. However, the influence of important parameters, such as viscosity of the liquid, has received only little attention. Moreover, the equilibrium state reached after a long time is still challenging on some aspects. Indeed, recent experimental measurements show deviations from pure analytical models in extreme conditions. Furthermore, current simulations would require several years of computing time to reach equilibrium state under those conditions. In the present paper, we show how viscosity influences the characteristic time of the aggregation process, with experimental measurements in agreement with previous theories on transient behaviour. Afterwards, we performed numerical simulations on equivalent systems with lower viscosities. Below a critical value of viscosity, a transition to a new aggregation regime is observed and analysed. We noticed this result can be used to reduce the numerical simulation time from several orders of magnitude, without modifying the intrinsic physical behaviour of the particles. However, it also implies that, for high magnetic fields, granular gases could have a very different behaviour from colloidal liquids. [less ▲]

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See detailMathematical modeling of extracorporeal CO2 removal therapy. A validation carried out on ten pigs
Habran, Simon ULiege; Desaive, Thomas ULiege; MORIMONT, Philippe ULiege et al

in Medical & Biological Engineering & Computing (2017)

The extracorporeal CO2 removal device (ECCO2RD) is used in clinics to treat patients suffering from respiratory failures like acute respiratory distress syn- drome (ARDS) or chronic obstructive pulmonary ... [more ▼]

The extracorporeal CO2 removal device (ECCO2RD) is used in clinics to treat patients suffering from respiratory failures like acute respiratory distress syn- drome (ARDS) or chronic obstructive pulmonary disease (COPD). The aim of this device is to decarboxylate blood externally with low blood flow. A mathematical model is proposed to describe protective ventilation, ARDS, and an extracorporeal CO2 removal therapy (ECCO2RT). The sim- ulations are compared with experimental data carried out on ten pigs. The results show a good agreement between the mathematical simulations and the experimental data, which provides a nice validation of the model. This model is thus able to predict the decrease of PCO2 during ECCO2RT for different blood flows across the extracorporeal lung support. [less ▲]

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See detailImpact of canopy aerodynamic distance spatial and temporal variability on long term eddy covariance measurements
Hurdebise, Quentin ULiege; Heinesch, Bernard ULiege; De Ligne, Anne ULiege et al

in Agricultural and Forest Meteorology (2017), 247(2017), 131-138

Understanding if and how the spatial and temporal variability of the surrounding environment affects turbulence is essential for long-term eddy covariance measurements. It requires characterizing the ... [more ▼]

Understanding if and how the spatial and temporal variability of the surrounding environment affects turbulence is essential for long-term eddy covariance measurements. It requires characterizing the surrounding environment. One way to achieve this is to analyse the canopy aerodynamic distance (Δ), which is the difference between measurement height (zm) and displacement height (d). In this work, an original method to estimate the canopy aerodynamic distance at a fine spatial (30° sectors) and temporal (one year) resolution was proposed. It was based on sensible heat cospectra analysis, calibrated on a measurement height change and validated using canopy height inventories. This method was applied to 20 years of eddy covariance measurements from the Vielsalm Terrestrial Observatory (VTO), a site located in a mixed temperate forest. The method allowed Δ spatio-temporal variability due to changes in canopy or measurement height to be detected. Relationships between Δ and turbulence statistics were then analysed: the momentum correlation coefficient (ruw) was found to be dependent on Δ, confirming that the measurements were made in the roughness sublayer of the atmospheric surface layer. In contrast, no such relationship was found sensible heat, CO2 or water vapour correlation coefficients, suggesting that the Δ variability did not affect significantly these fluxes. There were significant differences, however, between azimuthal directions, suggesting that these scalars were affected by forest heterogeneity in a different way. Various hypotheses were put forward to explain the differences and their relevance was evaluated. This study highlighted the need to consider the spatial and temporal variability of the surrounding environment in order to verify the consistency of long-term eddy covariance datasets. [less ▲]

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See detailMild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide
Parilti, Rahmet ULiege; Alaimo, David; Grignard, Bruno ULiege et al

in Journal of Materials Chemistry B (2017), 5(29), 5806-5815

Free-radical dispersion polymerisation of 2-hydroxyethyl methacrylate was carried out in supercritical carbon dioxide (scCO2) in the presence of stabilisers based on polyethylene oxide (PEO) and poly ... [more ▼]

Free-radical dispersion polymerisation of 2-hydroxyethyl methacrylate was carried out in supercritical carbon dioxide (scCO2) in the presence of stabilisers based on polyethylene oxide (PEO) and poly(heptadecafluorodecyl acrylate) (PFDA). Different architectures of copolymers (random, palm-tree and diblock) were tested for their surface tension, cloud point and as a stabilising agent. The diblock architecture was found to be the best candidate resulting in poly(HEMA) spherical particles with a size of 316 nm. Furthermore, the effect of the CO2-phobic block (PEO) in the diblock architecture was investigated by using three different chain lengths (1000, 2000, 5000 g mol−1). By optimizing the stabiliser composition and structure, mild reaction conditions have been identified allowing us to obtain well-defined spherical cross-linked poly(HEMA) particles with a mean diameter of unprecedented low size (216 nm) at a temperature as low as 35 °C. [less ▲]

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See detailOviposition deterrent activity of basil plants and their essentials oils against Tuta absoluta (Lepidoptera: Gelechiidae)
Yarou, Boni Barthélémy ULiege; Bawin, Thomas; Boullis, Antoine ULiege et al

in Environmental Science and Pollution Research (2017)

The leafminer Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is one of the most important pests of tomato, reducing crop yields by up to 100% in greenhouses and fields, in several countries globally ... [more ▼]

The leafminer Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is one of the most important pests of tomato, reducing crop yields by up to 100% in greenhouses and fields, in several countries globally. Because synthetic insecticides lead to resistance and have adverse effects on natural enemies and the health of producers, alternative control methods are needed. In this study, we assessed the oviposition-deterring effect of basil plants, Ocimum gratissimum L. and O. basilicum L. (Lamiaceae), using dual-choice behavioural assays performed in flight tunnels. We found that both plants significantly reduced T. absoluta oviposition behaviour on a tomato plant located nearby. To evaluate the potential effect of basil volatile organic compounds, we formulated essential oils of both plant species in paraffin oil, and observed a similar oviposition-deterring effect. Gas chromatography analyses detected 18 constituents in these essential oils which the major constituents included thymol (33.3%), p-cymene (20.4%), γ-terpinene (16.9%), myrcene (3.9%) in O. gratissimum and estragol (73.8%), linalool (8.6%), β-elemene (2.9%) and E-β-ocimene (2.6%) in O. basilicum. Twenty and 33 compounds were identified of the volatiles collected on O. gratissimum and O. basilicum plants, respectively. The main components include the following: p-cymene (33.5%), γ-terpinene (23.6%), α-terpinene (7.2%), α-thujene (6.7%) and E-α-bergamotene (38.9%) in O. gratissimum, and methyl eugenol (26.1%), E-β-ocimene (17.7%), and linalool (9.4%) in O. basilicum. Four compounds (α-pinene, β-pinene, Myrcene, Limonene) were common in essential oils and plants. Our results suggest the valuable potential of basil and associated essential oils as a component of integrated management strategies against the tomato leafminer. [less ▲]

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See detailMultiple-trait genomewide mapping and gene network analysis for scrotal circumference growth curves in Brahman cattle1
Soares, A. C. C.; Guimarães, S. E. F.; Kelly, M. J. et al

in Journal of Animal Science (2017), 95(8), 3331-3345

Fertility traits are economically important in cattle breeding programs. Scrotal circumference (SC) measures are repeatable, easily obtained, highly heritable, and positively correlated with female ... [more ▼]

Fertility traits are economically important in cattle breeding programs. Scrotal circumference (SC) measures are repeatable, easily obtained, highly heritable, and positively correlated with female fertility traits and sperm quality traits in males. A useful approach to summarize SC measures over time is using nonlinear models, which summarize specific measures of SC in a few parameters with biological interpretation. This approach facilitates the selection of bulls with larger SC and maturity index (K), that is, early maturing animals. Because SC is a sex-limited trait, identifying the underlying genomics of growth curve parameters will allow selection across both males and females. We reported the first multitrait genomewide association study (GWAS) of estimated growth curve parameters for SC data in Brahman cattle. Five widely used nonlinear models were tested to fit a total of 3,612 SC records, measured at 6, 12, 18, and 24 mo of age. The von Bertalanffy model, individually fitted for each animal, best fit this SC data. Parameter estimates SC at maturity (A) and K as well as SC at all ages were jointly analyzed in a GWAS to identify 1-Mb regions most strongly associated with each trait. Heritabilities were 0.25 for K and 0.32 for A and ranged from 0.51 to 0.72 for SC at 6 (SC6), 12 (SC12), 18 (SC18), and 24 mo of age (SC24). An overlapping window on chromosome 14 explaining around 0.8% of genetic variance for K, SC12, SC18, and SC24 was observed. The major positional candidate genes within 1 Mb upstream and downstream of this overlapping window were LYN, CHD7, RAB2A, and ARFGEF1. Windows of 1 Mb explaining more than 0.4% of each trait on chromosomes 1, 3, 6, 7, 14, 17, 18, 24, 25, and 26 were identified. Pathways and net-work analyses were indicated through transcription factors playing a role on fertility traits: SOX9, BRCA1, STAT3, NFE2L2, EGR1, PPARG, and NFKB1. Further validation studies on larger populations or other breeds are required to validate these findings and to improve our understanding of the biology and complex genetic architecture of traits associated with scrotal growth and male fertility in cattle. [less ▲]

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See detailThe tails of the satellite auroral footprints at Jupiter
Bonfond, Bertrand ULiege; Saur, J.; Grodent, Denis ULiege et al

in Journal of Geophysical Research. Space Physics (2017), 122

The electro-magnetic interaction between Io, Europa and Ganymede and the rotating plasma that surrounds Jupiter has a signature in the aurora of the planet. This signature, called the satellite footprint ... [more ▼]

The electro-magnetic interaction between Io, Europa and Ganymede and the rotating plasma that surrounds Jupiter has a signature in the aurora of the planet. This signature, called the satellite footprint, takes the form of a series of spots located slightly downstream of the feet of the field lines passing through the moon under consideration. In the case of Io, these spots are also followed by an extended tail in the downstream direction relative to the plasma flow encountering the moon. A few examples of a tail for the Europa footprint have also been reported in the northern hemisphere. Here we present a simplified Alfvénic model for footprint tails and simulations of vertical brightness profiles for various electron distribution, which favour such a model over quasi-static models. We also report here additional cases of Europa footprint tails, in both hemispheres, even though such detections are rare and difficult. Furthermore, we show that the Ganymede footprint can also be followed by a similar tail. Finally, we present a case of a 320° long Io footprint tail, while other cases in similar configurations do not display such a length. [less ▲]

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See detailExperimental and numerical investigation of the nonlinear dynamics of compliant mechanisms for deployable structures
Dewalque, Florence ULiege; Schwartz, Cédric ULiege; Denoël, Vincent ULiege et al

in Mechanical Systems & Signal Processing (2017), 101

This paper studies the dynamics of tape springs which are characterised by a highly geometrical nonlinear behaviour including buckling, the formation of folds and hysteresis. An experimental set-up is ... [more ▼]

This paper studies the dynamics of tape springs which are characterised by a highly geometrical nonlinear behaviour including buckling, the formation of folds and hysteresis. An experimental set-up is designed to capture these complex nonlinear phenomena. The experimental data are acquired by the means of a 3D motion analysis system combined with a synchronised force plate. Deployment tests show that the motion can be divided into three phases characterised by different types of folds, frequencies of oscillation and damping behaviours. Furthermore, the reproducibility quality of the dynamic and quasi-static results is validated by performing a large number of tests. In parallel, a nonlinear finite element model is developed. The required model parameters are identified based on simple experimental tests such as static deformed configurations and small amplitude vibration tests. In the end, the model proves to be well correlated with the experimental results in opposite sense bending, while in equal sense, both the experimental set-up and the numerical model are particularly sensitive to the initial conditions. [less ▲]

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See detailPhytosterols-induced viscoelasticity of oleogels prepared by using monoglycerides
Bin Sintang, M.D.; Danthine, Sabine ULiege; Brown, A. et al

in Food Research International (2017), 100

Monoglycerides (MGs) and phytosterols (PS) are known to form firm oleogels with liquid oil. However, the oleogels are prone to undergo polymorphic transition over time that lead to crystals' aggregation ... [more ▼]

Monoglycerides (MGs) and phytosterols (PS) are known to form firm oleogels with liquid oil. However, the oleogels are prone to undergo polymorphic transition over time that lead to crystals' aggregation thus, compromises physical properties. Thus, we combined MGs with PS to control the crystallization and modify the morphology of the combination oleogels, as both components are reported to interact together. The oleogels were prepared at different ratio combinations and characterized in their rheological, thermal, morphology, and diffraction properties. The results showed that the 8:2 MGP:PS exhibited higher storage modulus (G′) than the MGP mono-component. The combination oleogels exhibited effects on the crystallization and polymorphic transition. Consequently, the effects led to change in the morphology of the combination oleogels which was visualized using optical and electron microscope. The resultant effect on the morphology is associated with crystal defect. Due to observable crystals of MGP and PS, it is speculated that the combination oleogels formed a mixed crystal system. This was confirmed with diffraction analysis in which the corresponding peaks from MGP and PS were observed in the combination oleogels. However, the 8:2 oleogel exhibited additional peak at 35.41 Å. Ultimately, the 8:2 was the optimum combination observed in our study. Interestingly, this combination is inspired by nature as sterols (phytosterols) are natural component of lipid membrane whilst MGP has properties similar to phospholipids. Hence, the results of our study not only beneficial for oil structuring, but also for the fields of biophysical and pharmaceutical. [less ▲]

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See detailThe EBLM project. III. A Saturn-size low-mass star at the hydrogen-burning limit
von Boetticher, Alexander; Triaud, Amaury H. M. J.; Queloz, Didier et al

in Astronomy and Astrophysics (2017), 604

We report the discovery of an eclipsing binary system with mass-ratio q ˜ 0.07. After identifying a periodic photometric signal received by WASP, we obtained CORALIE spectroscopic radial velocities and ... [more ▼]

We report the discovery of an eclipsing binary system with mass-ratio q ˜ 0.07. After identifying a periodic photometric signal received by WASP, we obtained CORALIE spectroscopic radial velocities and follow-up light curves with the Euler and TRAPPIST telescopes. From a joint fit of these data we determine that EBLM J0555-57 consists of a sun-like primary star that is eclipsed by a low-mass companion, on a weakly eccentric 7.8-day orbit. Using a mass estimate for the primary star derived from stellar models, we determine a companion mass of 85 ± 4 M[SUB]Jup[/SUB] (0.081 M[SUB]⊙[/SUB]) and a radius of 0.84[SUP]+ 0.14[/SUP][SUB]-0.04[/SUB]R[SUB]Jup[/SUB] (0.084 R[SUB]⊙[/SUB]) that is comparable to that of Saturn. EBLM J0555-57Ab has a surface gravity log g[SUB]2[/SUB] =5.50[SUP]+ 0.03[/SUP][SUB]-0.13[/SUB] and is one of the densest non-stellar-remnant objects currently known. These measurements are consistent with models of low-mass stars. The photometry tables and radial velocities are only available at the CDS and on demand via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/L6">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/L6</A> [less ▲]

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See detailThe discoveries of WASP-91b, WASP-105b and WASP-107b: Two warm Jupiters and a planet in the transition region between ice giants and gas giants
Anderson, D. R.; Collier Cameron, A.; Delrez, L. et al

in Astronomy and Astrophysics (2017), 604

We report the discoveries of three transiting exoplanets. WASP-91b is a warm Jupiter (1.34 M[SUB]Jup[/SUB], 1.03 R[SUB]Jup[/SUB]) in a 2.8-day orbit around a metal-rich K3 star. WASP-105b is a warm ... [more ▼]

We report the discoveries of three transiting exoplanets. WASP-91b is a warm Jupiter (1.34 M[SUB]Jup[/SUB], 1.03 R[SUB]Jup[/SUB]) in a 2.8-day orbit around a metal-rich K3 star. WASP-105b is a warm Jupiter (1.8 M[SUB]Jup[/SUB], 0.96 R[SUB]Jup[/SUB]) in a 7.9-day orbit around a metal-rich K2 star. WASP-107b is a warm super-Neptune/sub-Saturn (0.12 M[SUB]Jup[/SUB], 0.94 R[SUB]Jup[/SUB]) in a 5.7-day orbit around a solar-metallicity K6 star. Considering that giant planets seem to be more common around stars of higher metallicity and stars of higher mass, it is notable that the hosts are all metal-rich, late-type stars. With orbital separations that place both WASP-105b and WASP-107b in the weak-tide regime, measurements of the alignment between the planets' orbital axes and their stars' spin axes may help us to understand the inward migration of short-period, giant planets. The mass of WASP-107b (2.2 M[SUB]Nep[/SUB], 0.40 M[SUB]Sat[/SUB]) places it in the transition region between the ice giants and gas giants of the Solar System. Its radius of 0.94 R[SUB]Jup[/SUB] suggests that it is a low-mass gas giant with a H/He-dominated composition. The planet thus sets a lower limit of 2.2 M[SUB]Nep[/SUB] on the planetary mass above which large gaseous envelopes can be accreted and retained by proto-planets on their way to becoming gas giants. We may discover whether WASP-107b more closely resembles an ice giant or a gas giant by measuring its atmospheric metallicity via transmission spectroscopy, for which WASP-107b is a very good target. Based on observations made with: the WASP-South photometric survey instrument, the 0.6-m TRAPPIST robotic imager, and the EulerCam camera and the CORALIE spectrograph mounted on the 1.2-m Euler-Swiss telescope.The photometric time-series and radial-velocity data used in this work are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/A110">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/604/A110</A> [less ▲]

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