References of "Article"      in Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages & linguistics   Literature   Performing arts   Philosophy & ethics   Religion & theology   Multidisciplinary, general & others Business & economic sciences   Accounting & auditing   Production, distribution & supply chain management   Finance   General management & organizational theory   Human resources management   Management information systems   Marketing   Strategy & innovation   Quantitative methods in economics & management   General economics & history of economic thought   International economics   Macroeconomics & monetary economics   Microeconomics   Economic systems & public economics   Social economics   Special economic topics (health, labor, transportation…)   Multidisciplinary, general & others Engineering, computing & technology   Aerospace & aeronautics engineering   Architecture   Chemical engineering   Civil engineering   Computer science   Electrical & electronics engineering   Energy   Geological, petroleum & mining engineering   Materials science & engineering   Mechanical engineering   Multidisciplinary, general & others Human health sciences   Alternative medicine   Anesthesia & intensive care   Cardiovascular & respiratory systems   Dentistry & oral medicine   Dermatology   Endocrinology, metabolism & nutrition   Forensic medicine   Gastroenterology & hepatology   General & internal medicine   Geriatrics   Hematology   Immunology & infectious disease   Laboratory medicine & medical technology   Neurology   Oncology   Ophthalmology   Orthopedics, rehabilitation & sports medicine   Otolaryngology   Pediatrics   Pharmacy, pharmacology & toxicology   Psychiatry   Public health, health care sciences & services   Radiology, nuclear medicine & imaging   Reproductive medicine (gynecology, andrology, obstetrics)   Rheumatology   Surgery   Urology & nephrology   Multidisciplinary, general & others Law, criminology & political science   Civil law   Criminal law & procedure   Criminology   Economic & commercial law   European & international law   Judicial law   Metalaw, Roman law, history of law & comparative law   Political science, public administration & international relations   Public law   Social law   Tax law   Multidisciplinary, general & others Life sciences   Agriculture & agronomy   Anatomy (cytology, histology, embryology...) & physiology   Animal production & animal husbandry   Aquatic sciences & oceanology   Biochemistry, biophysics & molecular biology   Biotechnology   Entomology & pest control   Environmental sciences & ecology   Food science   Genetics & genetic processes   Microbiology   Phytobiology (plant sciences, forestry, mycology...)   Veterinary medicine & animal health   Zoology   Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences   Chemistry   Earth sciences & physical geography   Mathematics   Physics   Space science, astronomy & astrophysics   Multidisciplinary, general & others Social & behavioral sciences, psychology   Animal psychology, ethology & psychobiology   Anthropology   Communication & mass media   Education & instruction   Human geography & demography   Library & information sciences   Neurosciences & behavior   Regional & inter-regional studies   Social work & social policy   Sociology & social sciences   Social, industrial & organizational psychology   Theoretical & cognitive psychology   Treatment & clinical psychology   Multidisciplinary, general & others     Showing results 301 to 400 of 48599     1 2 3 4 5 6 7 8 9     A Mixed Integer Programming formulation for the three dimensional bin packing problem deriving from an air cargo applicationPaquay, Célia ; Schyns, Michael ; Limbourg, Sabine in International Transactions in Operational Research (2016), 23(1-2), 187-213The present paper looks into the problem of optimising the loading of boxes into containers. The goal is to minimise the unused volume. This type of problem belongs to the family of Multiple Bin Size Bin ... [more ▼]The present paper looks into the problem of optimising the loading of boxes into containers. The goal is to minimise the unused volume. This type of problem belongs to the family of Multiple Bin Size Bin Packing Problems. The approach includes an extensive set of constraints encountered in real-world applications in the three-dimensional case: the stability, the fragility of the items, the weight distribution and the possibility to rotate the boxes. It also includes the specific situation in which containers are truncated parallelepipeds. This is typical in the field of air transportation. While most papers on cutting and packing problems describe ad-hoc procedures, this paper proposes a mixed integer linear program. The validity of this model is tested on small instances. [less ▲]Detailed reference viewed: 130 (43 ULg) Phenolic profile, antibacterial and cytotoxic properties of second grade date extract from Tunisian cultivars (Phoenix dactylifera L.)Kchaou, Wissal; Abbès, Fatma; Ben Mansour, Riadh et alin Food Chemistry (2016), (194), 1048-1055The present study aimed to investigate the phenolic profile of second grade date extracts and evaluate their antimicrobial and cytotoxic activities with regard to some pathogenic microorganisms. Phenolic ... [more ▼]The present study aimed to investigate the phenolic profile of second grade date extracts and evaluate their antimicrobial and cytotoxic activities with regard to some pathogenic microorganisms. Phenolic content was analyzed by HPLC. Antimicrobial activity was evaluated by the agar disk diffusion method, and in vitro cytotoxic activity was examined by cell proliferation assay. The results revealed that second grade dates presented three benzoic acids, five cinnamic acids and two flavonoids, with the predominance of q-coumaric acid (1998.80 lg/100 g). The antimicrobial activities showed that the date extracts were active against Gram (+) and Gram (-) bacteria, showing marked activity against Escherichia coli with an inhibition zone of 25 mm. Cytotoxicity assays showed that the date extracts were able to inhibit the proliferation of HeLa cell lines. The results confirmed that the date extracts were rich in biologically active compounds that are highly valued in the functional food and nutraceutical industries. [less ▲]Detailed reference viewed: 9 (0 ULg) Effect of wheel traffic on the physical properties of a LuvisolDestain, Marie-France ; Roisin, Christian; Dalcq, Anne-Catherine et alin Geoderma (2016)The effects of machine traffic were assessed on a Luvisol in a temperate climate area in Belgium. Soil samples were taken from topsoil (0.07-0.25 m) and subsoil (0.35-0.50 m), on plots under long-term ... [more ▼]The effects of machine traffic were assessed on a Luvisol in a temperate climate area in Belgium. Soil samples were taken from topsoil (0.07-0.25 m) and subsoil (0.35-0.50 m), on plots under long-term reduced tillage (RT) and conventional tillage (CT). Cone index (CI), bulk density (BD) and precompression stress (Pc) were chosen as indicators of mechanical strength. Mercury intrusion porosimetry was used to characterize the soil microporosity structure. It was presented in two forms: (i) cumulative pore volume vs. equivalent pore radius r, from which four classes of porosity were defined: r < 0.2 μm, 0.2 ≤ r < 9 µm, 9 ≤ r < 73 µm and r ≥ 73 μm; (ii) pore-size distribution (PSDs). In the reference situation where there had been no recent passage of machines, the voids with 0.2 ≤ r < 9 µm were the most important class in RT topsoil. The voids with r ≥ 73 µm represented the main porosity class in the topsoil of CT. In the subsoil, for both tillage systems, the porosity was almost equally distributed between voids with 0.2 ≤ r < 9 µm and voids with r greater than 9 µm. Machine traffic was carried out when the soil water content was close to the optimum Proctor. Although unfavourable, these wet conditions often occur during the beet harvesting period in Belgium. The highest modifications in soil structure (increase in BD and Pc, reduction of macroporosity r ≥ 73 μm) were observed in the topsoil of CT. More limited modifications were noticed in the soil structure of RT topsoil and subsoil layers but these latter are problematic in that the soil would no longer be loosened by subsequent tillage. These modifications could lead to soil consolidation as a result of wheel traffic year after year. [less ▲]Detailed reference viewed: 30 (8 ULg) Migration, prostitution and the representation of the black female subject in Nigerian video films about ItalyJedlowski, Alessandro in Journal of Italian Cinema and Media Studies (2016), 4(1), 9-23Much contemporary images of black women in Italian media are marked by the legacy of colonialist propaganda and tend to perpetuate a representation of black women as passive eroticized objects of the ... [more ▼]Much contemporary images of black women in Italian media are marked by the legacy of colonialist propaganda and tend to perpetuate a representation of black women as passive eroticized objects of the white male gaze. In this sense, Ponzanesi’s call for ‘new and less biased representations, which could help to assess the multiple subject positions that black identities now occupy’ (2005: 179) is still relevant. This article responds to this call by analyzing two Nigerian video films that thematize migration and prostitution trafficking in Italy. By highlighting the complexity of the processes of ‘subjectivation’ taking place throughout the migratory process, these videos invite their viewers to look at the postcolonial subject’s responsibility in shaping the world in which s/he lives, and offer a representation of the black female subject able to go beyond the voyeuristic attitude that characterize much of the existing contemporary Italian visual culture about this topic. [less ▲]Detailed reference viewed: 83 (2 ULg) SPICAM observations and modeling of Mars auroraeSoret, Lauriane ; Gérard, Jean-Claude ; Libert, Ludivine et alin Icarus (2016), 264Martian aurorae have been detected with the SPICAM instrument on board Mars Express both in the nadir and the limb viewing modes. In this study, we focus on three limb observations to determine both the ... [more ▼]Martian aurorae have been detected with the SPICAM instrument on board Mars Express both in the nadir and the limb viewing modes. In this study, we focus on three limb observations to determine both the altitudes and the intensities of the auroral emissions. The CO (a3P–X1R) Cameron bands between 190 and 270 nm, the CO Fourth Positive system (CO 4P) between 135 and 170 nm, the CO2+ doublet at 289 nm, the OI at 297.2 nm and the 130.4 nm OI triplet emissions have been identified in the spectra and in the time variations of the signals. The intensities of these auroral emissions have been quantified and the altitude of the strongest emission of the CO Cameron bands has been estimated to be 137 ± 27 km. The locations of these auroral events have also been determined and correspond to the statistical boundary of open-closed magnetic field lines, in cusp-like structures. The observed altitudes of the auroral emissions are reproduced by a Monte-Carlo model of electron transport in the Martian thermosphere for mono-energetic electrons between 40 and 200 eV. No correlation between electron fluxes measured in the upper thermosphere and nadir auroral intensity has been found. Here, we simulate auroral emissions observed both at the limb and at the nadir using electron energy spectra simultaneously measured with the ASPERA-3/ELS instrument. The simulated altitudes are in very good agreement with the observations. We find that predicted vertically integrated intensities for the various auroral emissions are overestimated, probably as a consequence of the inclination and curvature of the magnetic field line threading the aurora. However, the relative brightness of the CO and CO2+ emissions is in good agreement with the observations. [less ▲]Detailed reference viewed: 15 (7 ULg) Anticoherence of spin states with point-group symmetriesBaguette, Dorian ; Damanet, François ; Giraud, Olivier et alin Physical Review A (2015), 92We investigate multiqubit permutation-symmetric states with maximal entropy of entanglement. Such states can be viewed as particular spin states, namely anticoherent spin states. Using the Majorana ... [more ▼]We investigate multiqubit permutation-symmetric states with maximal entropy of entanglement. Such states can be viewed as particular spin states, namely anticoherent spin states. Using the Majorana representation of spin states in terms of points on the unit sphere, we analyze the consequences of a point-group symmetry in their arrangement on the quantum properties of the corresponding state. We focus on the identification of anticoherent states (for which all reduced density matrices in the symmetric subspace are maximally mixed) associated with point-group-symmetric sets of points. We provide three different characterizations of anticoherence and establish a link between point symmetries, anticoherence, and classes of states equivalent through stochastic local operations with classical communication. We then investigate in detail the case of small numbers of qubits and construct infinite families of anticoherent states with point-group symmetry of their Majorana points, showing that anticoherent states do exist to arbitrary order. [less ▲]Detailed reference viewed: 23 (3 ULg) Influence of process operating conditions on solvent thermal and oxidative degradation in post-combustion CO2 captureLéonard, Grégoire ; Crosset, Cyril; Toye, Dominique et alin Computers & Chemical Engineering (2015), 83The CO2 post-combustion capture with amine solvents is modeled as a complex system interconnecting process energy consumption and solvent degradation and emission. Based on own experimental data ... [more ▼]The CO2 post-combustion capture with amine solvents is modeled as a complex system interconnecting process energy consumption and solvent degradation and emission. Based on own experimental data, monoethanolamine degradation is included into a CO2 capture process model. The influence of operating conditions on solvent loss is validated with pilot plant data from literature. Predicted solvent consumption rates are in better agreement with plant data than any previous work, and pathways are discussed to further refine the model. Oxidative degradation in the absorber is the largest cause of solvent loss while thermal degradation does not appear as a major concern. Using a single model, the process exergy requirement decreases by 10.8% and the solvent loss by 11.1% compared to our base case. As a result, this model provides a practical tool to simultaneously minimize the process energy requirement and the solvent consumption in post-combustion CO2 capture plants with amine solvents. [less ▲]Detailed reference viewed: 74 (19 ULg) Polarization microlensing in the quadruply imaged broad absorption line quasar H1413+117Hutsemekers, Damien ; Sluse, Dominique ; Braibant, Lorraine et alin Astronomy and Astrophysics (2015), 584We have obtained spectropolarimetric observations of the four images of the gravitationally lensed broad absorption line quasar H1413+117. The polarization of the microlensed image D is significantly ... [more ▼]We have obtained spectropolarimetric observations of the four images of the gravitationally lensed broad absorption line quasar H1413+117. The polarization of the microlensed image D is significantly different, both in the continuum and in the broad lines, from the polarization of image A, which is essentially unaffected by microlensing. The observations suggest that the continuum is scattered off two regions, spatially separated, and producing roughly perpendicular polarizations. These results are compatible with a model in which the microlensed polarized continuum comes from a compact region located in the equatorial plane close to the accretion disk and the non-microlensed continuum from an extended region located along the polar axis. Based on observations made with ESO Telescopes at the Paranal Observatory (Chile). ESO program ID: 386.B-0337. [less ▲]Detailed reference viewed: 10 (2 ULg) A cross-sectional study to evaluate factors related to condom use with commercial sexual partners in workers from Ecuadorian companiesCabezas, Maria C.; Fornasini, Marco; Dardenne, Nadia et alin BMC Public Health (2015), 15(1), Detailed reference viewed: 17 (1 ULg) Contraception et risque carcinologiqueBELIARD, Aude in Réalités en Gynécologie-Obstétrique (2015), 179Hormonal contraception is used by millions of women worldwide for many years. Is there any impact on cancer risks (breast, ovarian, endometrial, cervical, liver, and colon cancer)? On the other hand, as a ... [more ▼]Hormonal contraception is used by millions of women worldwide for many years. Is there any impact on cancer risks (breast, ovarian, endometrial, cervical, liver, and colon cancer)? On the other hand, as a result of advances in cancer therapy, women within the reproductive-aged group are more likely to survive cancer and be interested to procreate or to delay pregnancy. Which method of contraception can be proposed to this special population of cancer patients? [less ▲]Detailed reference viewed: 11 (0 ULg) Revue épidémiologique des tendinopathies les plus fréquentesSancerne, Audrey; Kaux, Jean-François in Journal de Traumatologie du Sport (2015), 32(4), 223-228Tendinopathies are overused pathologies essentially present among sportsmen as well as workers. They represent 19 % of musculo-skeletaldisorders, more than 30 % the consultations of general and sports ... [more ▼]Tendinopathies are overused pathologies essentially present among sportsmen as well as workers. They represent 19 % of musculo-skeletaldisorders, more than 30 % the consultations of general and sports medicine on musculoskeletal system. At present, general epidemiology studiesare few. Data will therefore be included for each tendinopathy: rotator cuff tendinopathies, epicondylitis, trochanteric pain syndrome, patellar andcalcaneal tendinopathies and plantar fasciitis. The articles have been searched on the databases PubMed and Pedro. [less ▲]Detailed reference viewed: 11 (1 ULg) Exploring the bacterial diversity of Belgian steak tartare using metagenetics and qPCR analysisDelhalle, Laurent ; Korsak Koulagenko, Nicolas ; Taminiau, Bernard et alin Journal of Food Protection (2015)Steak tartare is a popular meat dish in Belgium. It is prepared with raw ground minced beef and eaten with sauce, vegetables, and spiced. Since it contains raw meat, steak tartare is highly prone to ... [more ▼]Steak tartare is a popular meat dish in Belgium. It is prepared with raw ground minced beef and eaten with sauce, vegetables, and spiced. Since it contains raw meat, steak tartare is highly prone to bacterial spoilage. The objective of this study was to explore the bacterial flora diversity in steak tartare in Belgium according to the source and to determine which bacteria are able to grow during the shelf life. A total of 58 samples from butchers’ shops, restaurants, sandwich shops and supermarkets were collected. These samples were analyzed using 16S rDNA metagenetics, a classical microbiological technique, and quantitative real-time PCR (qPCR) targeting the Lactobacillus genus. Samples were analyzed at the beginning and at the end of their shelf life, except for those from restaurants and sandwich shops analyzed only at the purchase date. Metagenetic analysis identified up to 180 bacterial species and 90 genera in some samples. But only seven bacterial species were predominant in the samples, depending on the source: Brochothrix thermosphacta, Lactobacillus algidus, Lactococcus piscium, Leuconostoc gelidum, Photobacterium kishitani, Pseudomonas spp. and Xanthomonas oryzae. With this work, an alternative method is proposed to evaluate the total flora in food samples based on the number of reads from metagenetic analysis and the results of qPCR. The degree of underestimation of aerobic plate counts (APCs) at 30°C estimated with the classical microbiology method was demonstrated in comparison with the proposed culture independent method. Compared to culture-based methods, metagenetic analysis combined with qPCR targeting Lactobacillus provides valuable information for characterizing the bacterial flora of raw meat. [less ▲]Detailed reference viewed: 55 (9 ULg) Broadening, Deepening, and Governing Innovation: Flemish Technology Assessment in Historical and Socio-Political PerspectiveVan Oudheusden, Michiel ; Charlier, Nathan ; Rosskamp, Benedikt et alin Research Policy (2015), 44(10), 1877-1886This article examines how science, technology, and innovation (STI) policies in Flanders (Belgium) are affected by, and potentially transformed through, technology assessments (TAs). Broadly defined, TAs ... [more ▼]This article examines how science, technology, and innovation (STI) policies in Flanders (Belgium) are affected by, and potentially transformed through, technology assessments (TAs). Broadly defined, TAs encompass activities and programs that expand and deepen the knowledge base of contemporary knowledge-based economies (KBEs), typically by including new actors (e.g. trade unions), ideas (e.g. science in society), and rationales (e.g. participatory techniques) in STI processes. Starting from the regionalization of STI policy in Belgium and the convergence of Flemish STI around global KBE principles, the article exemplifies how since the 1980s successive Flemish TA waves (early- warning, bottom-up, and interactive TA) have co-evolved with successive generations of Flemish innovation policy. Building on these findings, it argues that Flemish TA has assumed the role of mediator between science and society, both by counteracting and accommodating dominant STI paradigms. By providing a historical and socio-political perspective on TA and innovation policy, the article draws critical attention to the institutional settings and societal contexts in which TA is embedded, and questions TA's strategic utility within contemporary KBEs. This perspective sheds light on the Flemish government's recent decision to close its parliamentary TA institute and the institutional expansion of TA elsewhere in Europe. [less ▲]Detailed reference viewed: 31 (10 ULg) Multivariate coefficients of variation: Comparison and influence functionsAerts, Stéphanie ; Haesbroeck, Gentiane ; Ruwet, Christel in Journal of Multivariate Analysis (2015), 142In the univariate setting, coeﬃcients of variation are well-known and used to compare the variability of populations characterized by variables expressed in diﬀerent units or having really diﬀerent means ... [more ▼]In the univariate setting, coeﬃcients of variation are well-known and used to compare the variability of populations characterized by variables expressed in diﬀerent units or having really diﬀerent means. When dealing with more than one variable, the use of such a relative dispersion measure is much less common even though several generalizations of the coeﬃcient of variation to the multivariate setting have been introduced in the literature. In this paper, the lack of robustness of the sample versions of the multivariate coeﬃcients of variation (MCV) is illustrated by means of inﬂuence functions and some robust counterparts based either on the Minimum Covariance Determinant (MCD) estimator or on the S estimator are advocated. Then, focusing on two of the considered MCV’s, a diagnostic tool is derived and its eﬃciency in detecting observations having an unduly large eﬀect on variability is illustrated on a real-life data set. The inﬂuence functions are also used to compute asymptotic variances under elliptical distributions, yielding approximate conﬁdence intervals. Finally, simulations are conducted in order to compare, in a ﬁnite sample setting, the performance of the classical and robust MCV’s in terms of variability and in terms of coverage probability of the corresponding asymptotic conﬁdence intervals. [less ▲]Detailed reference viewed: 74 (25 ULg) Gender differences in responses in Gammarus pulex exposed to BDE-47: a gel-free proteomic approachGismondi, Eric ; Mazzucchelli, Gabriel ; De Pauw, Edwin et alin Ecotoxicology & Environmental Safety (2015), 122Very few ecotoxicological studies have considered differences in toxic effects on male and female organisms. Here, we investigated protein expression differences in caeca of Gammarus pulex males and ... [more ▼]Very few ecotoxicological studies have considered differences in toxic effects on male and female organisms. Here, we investigated protein expression differences in caeca of Gammarus pulex males and females under control conditions (unexposed) and after 96 h exposure to BDE-47. Using gel-free proteomic analysis, we have identified 45 proteins, of which 25 were significantly differently expressed according to sex and/or BDE-47 exposure. These proteins were involved in several biological processes such as energy metabolism, chaperone proteins, or transcription/translation. In unexposed amphipods, 11 proteins were significantly over-expressed in females, and 6 proteins were over-expressed in males. Under BDE-47 stress, 7 proteins were differently impacted according to sex. For example, catalase was over-expressed in exposed females and under-expressed in exposed males, as compared to respective controls. Conversely, proteins involved in energy metabolism were up-regulated in males and down-regulated in females. Our proteomic study showed differences in responses of males and females to BDE-47 exposure, emphasizing that sex is a confounding factor in ecotoxicological assessment. However, due to the limited information existing in databases on Gammarids, it was difficult to define a BDE-47 mechanism of action. The gel-free proteomic seems to be a promising method to develop in future ecotoxicological studies and thus, to improve our understanding of the mechanism of action of xenobiotics. [less ▲]Detailed reference viewed: 19 (2 ULg) Is the O2(a1Δg) Venus nightglow emission controlled by solar activity ?Soret, Lauriane ; Gérard, Jean-Claude in Icarus (2015), 262Several past studies showed that the O2(a1Δg) Venus nightglow emission at 1.27 μm is highly variable on a timescale of hours. We examine whether the intensity of this emission shows a more global trend ... [more ▼]Several past studies showed that the O2(a1Δg) Venus nightglow emission at 1.27 μm is highly variable on a timescale of hours. We examine whether the intensity of this emission shows a more global trend linked to solar activity. [less ▲]Detailed reference viewed: 17 (5 ULg) Comparison of serum fractionation methods by data independent label-free proteomicsBaiwir, Dominique ; Mazzucchelli, Gabriel ; Smargiasso, Nicolas et alin EuPA Open Proteomics (2015), 9Off-line sample prefractionations applied prior to biomarker discovery proteomics are options to enable more protein identifications and detect low-abundance proteins. This work compared five commercial ... [more ▼]Off-line sample prefractionations applied prior to biomarker discovery proteomics are options to enable more protein identifications and detect low-abundance proteins. This work compared five commercial methods efficiency to raw serum analysis using label-free proteomics. The variability of the protein quantities determined for each process was similar to the unprefractionated serum. A 49% increase in protein identifications and 12.2% of reliable quantification were obtained. A 61 times lower limit of protein quantitation was reached compared to protein concentrations observed in raw serum. The concentrations of detected proteins were confronted to estimated reference values. [less ▲]Detailed reference viewed: 42 (2 ULg) Development and validation of a short Italian UPPS-P Impulsive Behavior ScaleD'Orta, Isabella; Burnay, Jonathan ; Aiello, Daniela et alin Addictive Behaviors Reports (2015), 2Impulsivity is a multidimensional construct that plays a prominent role in the development, maintenance, and relapse of addictive disorders. The UPPS-P model of impulsivity, which distinguishes between ... [more ▼]Impulsivity is a multidimensional construct that plays a prominent role in the development, maintenance, and relapse of addictive disorders. The UPPS-P model of impulsivity, which distinguishes between five impulsivity components (positive urgency, negative urgency, lack of perseverance, lack of premeditation, sensation seeking), has been increasingly investigated during the last decade in relation to addictive and risky behaviors. Unfortunately, it currently lacks a validated scale that allows Italian researchers and clinicians to measure impulsivity based on the UPPS-P model. The current study fills this gap by testing the psychometric properties of a short 20-item Italian scale used to assess the five dimensions of the UPPS-P model in 188 volunteer participants from the community. Confirmatory factor analysis supported a model of five distinct, but interrelated, impulsivity components. The results indicated good internal consistency (Cronbach's α ranges from .73 to .84). Construct validity was evidenced by specific relations with measures of addictive behaviors and depressive symptoms. On the whole, this study demonstrated that the Italian short UPPS-P has good psychometric properties. [less ▲]Detailed reference viewed: 17 (0 ULg) Pressure-impulse diagram of a beam developing non-linear membrane action under blast loadingHamra, Lotfi ; Demonceau, Jean-François ; Denoël, Vincent in International Journal of Impact Engineering (2015), 86The p–I diagram of a frame beam subjected to blast loading is established, including the elastic lateral restraint and inertia offered by the rest of the structure, the development of nonlinear membrane ... [more ▼]The p–I diagram of a frame beam subjected to blast loading is established, including the elastic lateral restraint and inertia offered by the rest of the structure, the development of nonlinear membrane action and also, the bending-tension (M−N) interaction that develops in the plastic hinges. The analytical procedures to compute the asymptotes in the p–I diagram as well as a parametric study on the p–I diagram are provided. A dimensional analysis of the problem reveals that, under the considered assumptions, four dimensionless parameters mainly influence the required ductility of the beam. Two of them are related to the behavior of the indirectly affected part (the lateral restraint and mass). Another one is related to the mechanical properties of the investigated beam (i.e. the ratio of the bending to axial resistance). The last parameter incorporates scales of the geometry and of the deformed configuration at the onset of the plastic mechanism. [less ▲]Detailed reference viewed: 91 (32 ULg) An overview of potamodromous fish upstream movements in medium-sized rivers, by means of fish passes monitoringBenitez, Jean-Philippe ; Nzau Matondo, Billy ; Dierckx, Arnaud et alin Aquatic Ecology (2015), 49(4), 481-497This study aims to investigate the upstream movement patterns of potamodromous fish species using multi-annual monitoring of modern multi-species fish passes in two medium-sized Belgian rivers: the ... [more ▼]This study aims to investigate the upstream movement patterns of potamodromous fish species using multi-annual monitoring of modern multi-species fish passes in two medium-sized Belgian rivers: the Berwinne and the Ambleve. During a 6-year monitoring period including a frequency of 1–5 times per week, the captured individuals were identified, measured and weighed to determine species abundance, and the periodicity of their seasonal movement patterns was investigated in relation to environmental factors. In the Ambleve, 22 different fish species were monitored (n = 1513 individuals; biomass of 154 kg) and 14 species in the Berwinne (n = 3720; 408 kg). In both fish passes, inter-annual differences were observed, but the first year of monitoring was the best in terms of biomass, indicating the existence of an opening effect just after the fish passes opening, which allowed new migration routes. Salmonids and rheophilic cyprinids were predominant in terms of biomass, while minnow and spirlin were predominant in terms of number of fishes. The diversity in sizeranged from 46 to 760 mm demonstrating the importance of movements in various life stages. The capture periodicity showed different mobility patterns between the adult and juvenile stages in most species. Movements occurred frequently during the circus reproduction period for some species, but many species moved also apart from spawning period. This study highlights the omnipresence of patrimonial holobiotic potamodromous fish at different life stages that reflect their biological needs to move throughout the annual cycle. They must be considered as target species in river continuity restoration programmes and fish-pass design. [less ▲]Detailed reference viewed: 38 (11 ULg) The protective effects of free wheel-running against cocaine psychomotor sensitization persist after exercise cessation in C57BL/6J miceLespine, Louis-Ferdinand ; Tirelli, Ezio in Neuroscience (2015), 310Previous literature suggests that free access to a running wheel can attenuate the behavioral responsiveness to addictive drugs in rodents. In a few studies, wheel-running cessation accentuated drug ... [more ▼]Previous literature suggests that free access to a running wheel can attenuate the behavioral responsiveness to addictive drugs in rodents. In a few studies, wheel-running cessation accentuated drug responsiveness. Here, we tested whether free wheel-running cessation is followed by (1) an accentuation or (2) an attenuation of cocaine psychomotor sensitization, knowing that no cessation of (continuous) wheel-running is associated with an attenuation of cocaine responsiveness. Male C57BL/6J mice, aged 35 days, were housed singly either with (exercising mice) or without (non-exercising mice) a running wheel. At the end of a period of 36 days, half of the exercising mice were deprived of their wheel whereas the other half of exercising mice kept their wheel until the end of experimentation (which lasted 85 days). The non-exercising mice were housed without wheel throughout experimentation. Testing took place 3 days after exercise cessation. After 2 once-daily drug-free test sessions, mice were tested for initiation of psychomotor sensitization over 13 once-daily injections of 8 mg/kg cocaine. Post-sensitization conditioned activation (saline challenge) and long-term expression of sensitization were assessed 2 or 30 days after the last sensitizing injection (same treatments as for initiation of sensitization), respectively. Exercising mice and mice undergoing wheel-running cessation exhibited comparable degrees of attenuation of all cocaine effects in comparison with the continuously non-exercising mice, which showed the greatest effects. Thus, the efficaciousness of wheel-running at attenuating cocaine sensitization not only resisted to exercise cessation but also was unambiguously persistent (an important effect rarely reported in previous literature). [less ▲]Detailed reference viewed: 13 (2 ULg) Experimental and computational micro–mechanical investigations of compressive properties of polypropylene/multi–walled carbon nanotubes nanocomposite foamsWan, Fangyi; Tran, Minh Phuong; Leblanc, Christophe et alin Mechanics of Materials (2015), 91(Part 1), 95-118The compressive behavior of nanocomposite foams is studied by both experimental and computational micro-mechanics approaches with the aim of providing an efficient computational model for this kind of ... [more ▼]The compressive behavior of nanocomposite foams is studied by both experimental and computational micro-mechanics approaches with the aim of providing an efficient computational model for this kind of material. The nanocomposites based on polypropylene (PP) and different contents of multi-walled carbon nanotubes (CNTs) are prepared by melt mixing method. The nanocomposite samples are foamed using super-critical carbon dioxide (ScCO2) as blowing agent at different soaking temperatures. The influence of this foaming parameter on the morphological characteristics of the foam micro-structure is discussed. Differential Scanning Calorimetry (DSC) measurements are used to quantify the crystallinity degree of both nanocomposites and foams showing that the crystallinity degree is reduced after the foaming process. This modification leads to mechanical properties of the foam cell walls that are different from the raw nanocomposite PP/CNTs material. Three--point bending tests are performed on the latter to measure the flexural modulus in terms of the crystallinity degree. Uniaxial compression tests are then performed on the foamed samples under quasi-static conditions in order to extract the macro-scale compressive response. Next, a two-level multi-scale approach is developed to model the behavior of the foamed nanocomposite material. On the one hand, the micro-mechanical properties of nanocomposite PP/CNTs cell walls are evaluated from a theoretical homogenization model accounting for the micro-structure of the semi-crystalline PP, for the degree of crystallinity, and for the CNT volume fraction. The applicability of this theoretical model is demonstrated via the comparison with experimental data from the described experimental measurements and from literature. On the other hand, the macroscopic behavior of the foamed material is evaluated using a computational micro-mechanics model using tetrakaidecahedron unit cells and periodic boundary conditions to estimate the homogenized properties. The unit cell is combined with several geometrical imperfections in order to capture the elastic collapse of the foamed material. The numerical results are compared to the experimental measurements and it is shown that the proposed unit cell computational micro-mechanics model can be used to estimate the homogenized behavior, including the linear and plateau regimes, of nanocomposite foams. [less ▲]Detailed reference viewed: 102 (48 ULg) The importance of phenotypic diversity in conservation: Resilience of palmate newt morphotypes after fish removal in Larzac ponds (France)Denoël, Mathieu ; Winandy, Laurane in Biological Conservation (2015), 192Resilience of organisms after threat removal is an essential feature to justify conservation efforts. Amphibians are particularly threatened with a worldwide decline, showing a low resistance to invaders ... [more ▼]Resilience of organisms after threat removal is an essential feature to justify conservation efforts. Amphibians are particularly threatened with a worldwide decline, showing a low resistance to invaders such as fish. Previous research has shown that they could recover after fish extirpation due to metamorphosed colonizers. However, not all amphibian phenotypes are able to persist to fish introduction and disperse. In many species of newts and salamanders, paedomorphs retain gills in the adult stage, which makes them fully aquatic. A proposed way to conserve this phenotype would be to remove introduced fish from their habitats. However, because paedomorphosis is usually not expressed in the presence of fish, it is unknown whether fish removal could allow the resilience of paedomorphs. This would be possible only if progenies of metamorphosed individuals could become paedomorphic in restored habitats. Through a quantitative survey in three types of ponds, including control ponds without fish, ponds in which fish were extirpated, and fish ponds, we determined abundances of paedomorphic and metamorphic palmate newts (Lissotriton helveticus). The results show that paedomorphosis resilience is possible and even highly frequent, as paedomorphs were found in 80% of ponds where fish disappeared. Abundances were similar between these ponds and control ponds whereas fish ponds had almost no newts, indicating a very low resistance to invaders. This shows that conserving common phenotypes can help to preserve endangered phenotypes, as paedomorphs were produced through the reproduction of metamorphs. There is thus hope of maintaining intraspecific biodiversity though conservation action involving threat removal. [less ▲]Detailed reference viewed: 35 (16 ULg) Environmental impacts of phosphoric acid production using di-hemihydrate process: a Belgian case studyBelboom, Sandra ; Szöcs, Carl; Léonard, Angélique in Journal of Cleaner Production (2015), 108This paper undertakes an environmental evaluation of phosphoric acid production, using industrial data from Prayon SA in Belgium. Phosphoric acid is produced using the wet di-hemihydrate process also ... [more ▼]This paper undertakes an environmental evaluation of phosphoric acid production, using industrial data from Prayon SA in Belgium. Phosphoric acid is produced using the wet di-hemihydrate process also called Central Prayon process. Both grades of phosphoric acid are evaluated: fertilizer and purified grades. Specificities of this plant are highlighted and improvements of the process in terms of energy and facilities integration through years are quantified as environmental benefits. The implementation on site of two sulphuric acid production facilities and their energetic integration allow a reduction of climate change impact of 80%. Results also show the importance of phosphogypsum valorisation which is sold for the main part in this case study. Concerning the purified grade, this specific process has been compared to the thermal process, using Best Available Techniques (BAT) values for the modelling. It shows a reduced environmental impact for the wet process in the majority of categories studies. [less ▲]Detailed reference viewed: 35 (1 ULg) A probabilistic model for predicting the uncertainties of the humid stiction phenomenon on hard materialsHoang Truong, Vinh ; Wu, Ling ; Paquay, Stéphane et alin Journal of Computational & Applied Mathematics (2015), 289Stiction is a major failure in microelectromechanical system (MEMS) devices in which two contacting surfaces can remain stuck together because of the adhesive forces. Due to the difference between the ... [more ▼]Stiction is a major failure in microelectromechanical system (MEMS) devices in which two contacting surfaces can remain stuck together because of the adhesive forces. Due to the difference between the surfaces roughness and the adhesive force range, the real contact areas are usually smaller than the apparent one, resulting in a scatter in the adhesive forces. Consequently, the stiction is an uncertain phenomenon. In this work, we develop a probabilistic model to predict the uncertainties of stiction due to the capillary forces acting on stiff materials. This model contains two levels: at the deterministic level, the model can predict the pull-out adhesive contact forces for a given surface topology; at the probabilistic level, the model generates independent identically distributed surfaces on which the deterministic solution can be applied to evaluate the uncertainties related to the stiction phenomenon. [less ▲]Detailed reference viewed: 165 (65 ULg) Recent advances in BLV researchBarez, Pierre-Yves ; De Brogniez, Alix ; Carpentier, Alexandre et alin Viruses (2015), 7(11), 6080-6088Different animal models have been proposed to investigate the mechanisms of HTLV-induced pathogenesis: rats, transgenic and NOD-SCID/γcnull (NOG) mice, rabbits, squirrel monkeys, baboons and macaques ... [more ▼]Different animal models have been proposed to investigate the mechanisms of HTLV-induced pathogenesis: rats, transgenic and NOD-SCID/γcnull (NOG) mice, rabbits, squirrel monkeys, baboons and macaques. These systems indeed provide useful information but have intrinsic limitations such as lack of disease relevance, species specificity or inadequate immune response. Another strategy based on a comparative virology approach is to characterize a related pathogen and to speculate on possible shared mechanisms. In this perspective, bovine leukemia virus (BLV), another member of the deltaretrovirus genus, is evolutionary related to HTLV-1. BLV induces lymphoproliferative disorders in ruminants providing useful information on the mechanisms of viral persistence, genetic determinants of pathogenesis and potential novel therapies. [less ▲]Detailed reference viewed: 24 (4 ULg) Discrimination of deciduous tree species from time series of unmanned aerial system imageryLisein, Jonathan ; Michez, Adrien ; Claessens, Hugues et alin PLoS ONE (2015), 10(11), Technology advances can revolutionize Precision Forestry by providing accurate and fine forest information at tree level. This paper addresses the question of how and particularly when Unmanned Aerial ... [more ▼]Technology advances can revolutionize Precision Forestry by providing accurate and fine forest information at tree level. This paper addresses the question of how and particularly when Unmanned Aerial System (UAS) should be used in order to efficiently discriminate deciduous tree species. A time series of high resolution UAS imagery was collected to cover the growing season from leaf flush to leaf fall. Full benefit was taken of the temporal resolution of UAS acquisition, one of the most promising features of small drones. The disparity in forest tree phenology is at the maximum during early spring and late autumn. But the phenology state that optimized the classification result is the one that minimizes the spectral variation within tree species groups and, at the same time, maximizes the phenologic differences between species. Sunlit tree crowns (5 deciduous species groups) were classified using a Random Forest approach for monotemporal, two-date and three-date combinations. The end of leaf flushing was the most efficient single-date time window. Multitemporal datasets definitely improve the overall classification accuracy. But single-date high resolution orthophotomosaics, acquired on optimal time-windows, result in a very good classification accuracy (overall out of bag error of 16%). [less ▲]Detailed reference viewed: 83 (41 ULg) Retrieval of ammonia from ground-based FTIR solar spectraDammers, Enrico; Vigouroux, C; Palm, M et alin Atmospheric Chemistry and Physics (2015), 15We present a retrieval method for ammonia (NH3) total columns from ground-based Fourier Transform InfraRed (FTIR) observations. Observations from Bremen (53.10° N, 8.85° E), Lauder (45.04° S, 169.68° E ... [more ▼]We present a retrieval method for ammonia (NH3) total columns from ground-based Fourier Transform InfraRed (FTIR) observations. Observations from Bremen (53.10° N, 8.85° E), Lauder (45.04° S, 169.68° E), Reunion (20.9° S, 55.50° E) and Jungfraujoch (46.55° N, 7.98° E) were used to illustrate the capabilities of the method. NH3 mean total columns ranging three orders of magnitude were obtained with higher values at Bremen (mean of 13.47 × 1015 molecules cm-2) to the lower values at Jungfraujoch (mean of 0.18 × 1015 molecules cm-2). In conditions with high surface concentrations of ammonia, as in Bremen, it is possible to retrieve information on the vertical gradient as two layers can be discriminated. The retrieval there is most sensitive to ammonia in the planetary boundary layer, where the trace gas concentration is highest. For conditions with low concentrations only the total column can be retrieved. Combining the systematic and random errors we have a mean total error of 26 % for all spectra measured at Bremen (Number of spectra (N) = 554), 30 % for all spectra from Lauder (N =2412), 25 % for spectra from Reunion (N =1262) and 34 % for spectra measured at Jungfraujoch (N =2702). The error is dominated by the systematic uncertainties in the spectroscopy parameters. Station specific seasonal cycles were found to be consistent with known seasonal cycles of the dominant ammonia sources in the station surroundings. The developed retrieval methodology from FTIR-instruments provides a new way to obtain highly time-resolved measurements of ammonia burdens. FTIR-NH3 observations will be useful for understanding the dynamics of ammonia concentrations in the atmosphere and for satellite and model validation. It will also provide additional information to constrain the global ammonia budget. [less ▲]Detailed reference viewed: 30 (5 ULg) Thermoelectric properties of the unfilled skutterudite FeSb3 from first principles and Seebeck local probesLemal, Sébastien ; Ngoc, Nguyen; de Boor, Johanens et alin Physical Review. B: Condensed Matter and Materials Physics (2015), 92Using a combination of first-principles calculations and experimental transport measurements, we study the electronic and magnetic structure of the unfilled skutterudite FeSb3. We employ the hybrid ... [more ▼]Using a combination of first-principles calculations and experimental transport measurements, we study the electronic and magnetic structure of the unfilled skutterudite FeSb3. We employ the hybrid functional approach for exchange-correlation. The ground state is determined to be anti-ferromagnetic with an atomic magnetic moment of 1.6 μB/Fe. The Néel temperature Tn is estimated at 6 K, in agreement with experiments which found a paramagnetic state down to 10 K. The ground state is semiconducting, with a small electronic gap of 33 meV, also consistent with previous experiments on films. Charge carrier concentrations are estimated from Hall resistance measurements. The Seebeck coefficient is measured and mapped using a scanning probe at room temperature that yields an average value of 38.6 μV/K, slightly lower than the theoretical result. The theoretical conductivity is analyzed as a function of temperature and concentration of charge carriers. [less ▲]Detailed reference viewed: 24 (8 ULg) A linear Hf isotope-age array despite different granitoid sources and complex Archean geodynamics: Example from the Pietersburg block (South Africa)Laurent, Oscar ; Zeh, Arminin Earth and Planetary Science Letters (2015), 430Detailed reference viewed: 13 (2 ULg) Laser cladding as repair technology for Ti6Al4V alloy: Influence of building strategy on microstructure and hardnessPaydas, Hakan ; Mertens, Anne ; Carrus, Raoul et alin Materials & Design (2015), 85Laser cladding is a metal deposition technique used to fabricate or repair components made from high value metallic alloys. In the present work Ti-6Al-4V deposits with variable thickness are made to ... [more ▼]Laser cladding is a metal deposition technique used to fabricate or repair components made from high value metallic alloys. In the present work Ti-6Al-4V deposits with variable thickness are made to assess the use of laser cladding as a repair technology. Both the effect of the building strategy (BS) and the incident energy (IE) on the metallurgical characteristics of the deposits in relation to their complex thermal history have been studying. It is shown that for the configuration consisting in a decreasing track length (DTL) under high IE, a gradient of cooling rate exists that leads to the presence of different phases within the microstructure. Conversely homogeneous microstructures are present either for the configuration with a constant track length (CTL) under high IE, and for the strategy obtained from a DTL under low IE. Depending on the possible heat accumulation the nature of the phases are determined together with hardness maps within the deposits. Some qualification criteria are set prior to tensile tests to selected the adequate candidate-deposit that does not weaken the cladded material when it is stressed. A thermo-metallurgical scheme is proposed that helps understanding the effect of both the BS and the IE on the microstructure. [less ▲]Detailed reference viewed: 37 (10 ULg) Synthesis of polyphosphodiesters by ring-opening polymerization of cyclic phosphates bearing allyl phosphoester protecting groupsClément, Benoit; Molin, Daniel G.; Jérôme, Christine et alin Journal of Polymer Science. Part A, Polymer Chemistry (2015), 53(22), 2642-2648The allyl phosphoester group is shown to be a protecting group for the synthesis of anionic polyphosphodiesters. Our strategy relies on the synthesis of a cyclic phosphate monomer bearing a pendant allyl ... [more ▼]The allyl phosphoester group is shown to be a protecting group for the synthesis of anionic polyphosphodiesters. Our strategy relies on the synthesis of a cyclic phosphate monomer bearing a pendant allyl phosphoester group, its easy purification by fractional distillation, its organocatalyzed ring-opening polymerization by 1,8-diazobicyclo[5.4.0]undec-7-ene (DBU) and 1-[3,5-bis(trifluoromethyl)phenyl]-3-cyclohexyl-thiourea (TU). Finally, the deprotection of the allyl phosphoester group is carried out by reaction with sodium benzenethiolate in the absence of any detectable degradation. [less ▲]Detailed reference viewed: 66 (20 ULg) First New Solar Models With Opas Opacity TablesLe Pennec, Maëlle; Turck-Chièze, Sylvaine; Salmon, Sébastien et alin Astrophysical Journal Letters (2015), 813(2), 42Stellar seismology appears more and more as a powerful tool for a better determination of the fundamental properties of solar-type stars. However, the particular case of the Sun is still challenging. For ... [more ▼]Stellar seismology appears more and more as a powerful tool for a better determination of the fundamental properties of solar-type stars. However, the particular case of the Sun is still challenging. For about a decade now, the helioseismic sound-speed determination has continued to disagree with the standard solar model (SSM) prediction, questioning the reliability of this model. One of the sources of uncertainty could be in the treatment of the transport of radiation from the solar core to the surface. In this Letter, we use the new OPAS opacity tables, recently available for solar modeling, to address this issue. We discuss first the peculiarities of these tables, then we quantify their impact on the solar sound-speed and density profiles using the reduced OPAS tables taken on the grids of the OPAL ones. We use the two evolution codes, Modules for Experiments in Stellar Astrophysics and Code Liégeois d'Evolution Stellaire, that led to similar conclusions in the solar radiative zone. In comparison to commonly used OPAL opacity tables, the new solar models are computed for the most recent photospheric composition with OPAS tables and present improvements to the location of the base of the convective zone and to the description of the solar radiative zone in comparison to the helioseismic observations, even if the differences in the Rosseland mean opacity do not exceed 6%. We finally carry out a comparison to a solar model computed with the OP opacity tables. [less ▲]Detailed reference viewed: 10 (3 ULg) Diurnal cycle and multi-decadal trend of formaldehyde in the remote atmosphere near 46° NFranco, Bruno ; Marais, Eloise A.; Bovy, Benoît et alin Atmospheric Chemistry & Physics Discussions (2015), 15Only very few long-term trends of formaldehyde (HCHO) exist. Furthermore, many uncertainties remain as to its diurnal cycle, representing a large short-term variability superimposed on seasonal and inter ... [more ▼]Only very few long-term trends of formaldehyde (HCHO) exist. Furthermore, many uncertainties remain as to its diurnal cycle, representing a large short-term variability superimposed on seasonal and inter-annual variations that should be accounted for when comparing ground-based observations to e.g., model results. In this study, we derive a multi-decadal time series (January 1988 – June 2015) of HCHO total columns from ground-based high-resolution Fourier transform infrared (FTIR) solar spectra recorded at the high-altitude station of Jungfraujoch (Swiss Alps, 46.5° N, 8.0° E, 3580 m a.s.l.), allowing for the characterization of the mid-latitudinal atmosphere for background conditions. First we investigate the HCHO diurnal variation, peaking around noontime and mainly driven by the intra-day insolation modulation and methane (CH4) oxidation. We also characterize quantitatively the diurnal cycles by adjusting a parametric model to the observations, which links the daytime to the HCHO columns according to the monthly intra-day regimes. It is then employed to scale all the individual FTIR measurements on a given daytime in order to remove the effect of the intra-day modulation for improving the trend determination and the comparison with HCHO columns simulated by the state-of-the-art chemical transport model GEOS-Chem v9-02. Such a parametric model will be useful to scale the Jungfraujoch HCHO columns on satellite overpass times in the framework of future calibration/validation efforts of space borne sensors. GEOS-Chem sensitivity tests suggest then that the seasonal and inter-annual HCHO column variations above Jungfraujoch are predominantly led by the atmospheric CH4 oxidation, with a maximum contribution of 25 % from the anthropogenic non-methane volatile organic compound precursors during wintertime. Finally, trend analysis of the so-scaled 27-year FTIR time series reveals a long-term evolution of the HCHO columns in the remote troposphere to be related with the atmospheric CH4 fluctuations and the short-term OH variability: +2.9 %/yr between 1988 and 1995, -3.7 %/yr over 1996-2002 and +0.8/% yr from 2003 onwards. [less ▲]Detailed reference viewed: 19 (2 ULg) Optimal electron, phonon, and magnetic characteristics for low energy thermally induced magnetization switchingAtxitia, U.; Ostler, Thomas ; Chantrell, R. W. et alin Applied Physics Letters (2015), 107(19), 192402Using large-scale computer simulations, we thoroughly study the minimum energy required to ther- mally induced magnetization switching (TIMS) after the application of a femtosecond heat pulse in ... [more ▼]Using large-scale computer simulations, we thoroughly study the minimum energy required to ther- mally induced magnetization switching (TIMS) after the application of a femtosecond heat pulse in transition metal-rare earth ferrimagnetic alloys. We find that for an energy efficient TIMS, a low ferrimagnetic net magnetization with a strong temperature dependence is the relevant factor for the magnetic system. For the lattice and electron systems, the key physics for efficient TIMS is a large electron-phonon relaxation time. Importantly, we show that as the cooling time of the heated elec- trons is increased, the minimum power required to produce TIMS can be reduced by an order of magnitude. Our results show the way to low power TIMS by appropriate engineering of magnetic heterostructures. [less ▲]Detailed reference viewed: 15 (0 ULg) How do cumulative live birth rates and cumulative multiple live birth rates over complete courses of assisted reproductive technology treatment per woman compare among registries?De Neubourg, Diane; Bogaerts, Kris; Blockeel, Christophe et alin Human Reproduction (2015)Detailed reference viewed: 5 (1 ULg) Observations of radio-quiet quasars at 10-mas resolution by use of gravitational lensingJackson, Neal; Tagore, Amitpal S.; Roberts, Carl et alin Monthly Notices of the Royal Astronomical Society (2015), 454We present Very Large Array detections of radio emission in 4 four-image gravitational lens systems with quasar sources: HS 0810+2554, RX J0911+0511, HE 0435-1223 and SDSS J0924+0219, and extended Multi ... [more ▼]We present Very Large Array detections of radio emission in 4 four-image gravitational lens systems with quasar sources: HS 0810+2554, RX J0911+0511, HE 0435-1223 and SDSS J0924+0219, and extended Multi-Element Remote Linked Interferometer (e-MERLIN) observations of two of the systems. The first three are detected at a high level of significance, and SDSS J0924+0219 is detected. HS 0810+2554 is resolved, allowing us for the first time to achieve 10-mas resolution of the source frame in the structure of a radio-quiet quasar. The others are unresolved or marginally resolved. All four objects are among the faintest radio sources yet detected, with intrinsic flux densities in the range 1-5 μJy; such radio objects, if unlensed, will only be observable routinely with the Square Kilometre Array. The observations of HS 0810+2554, which is also detected with e-MERLIN, strongly suggest the presence of a mini active galactic nucleus, with a radio core and milliarcsecond scale jet. The flux densities of the lensed images in all but HE 0435-1223 are consistent with smooth galaxy lens models without the requirement for smaller scale substructure in the model, although some interesting anomalies are seen between optical and radio flux densities. These are probably due to microlensing effects in the optical. [less ▲]Detailed reference viewed: 11 (0 ULg) Do single, double or triple fungicide sprays differentially affect the grain quality in winter wheat?El Jarroudi, Moussa ; kOUADIO, Louis; Junk et alin Field Crops Research (2015), 183(257-266), Foliar fungicides in wheat are typically used to safeguard against economic losses from diseases. In this study, we assessed the effects of three fungicide spray regimes [single, double, and triple ... [more ▼]Foliar fungicides in wheat are typically used to safeguard against economic losses from diseases. In this study, we assessed the effects of three fungicide spray regimes [single, double, and triple treatments] on four different grain quality parameters [thousand grain weight (TGW), test weight (TW), grain protein content (GPC), and Zeleny sedimentation volume (ZSV)] during the 2006–2009 period at two sites in Luxembourg. The fungicides used were generally a mix of chlorothalonil and triazoles. At Burmerange, (cultivar Cubus), the values of TGW, TW, GPC and ZSV ranged from 38 to 62 g, 67 to 83 kg hl−1, 12.0% to 14.7% dry matter (DM), and 27 to 54 ml, respectively. Whereas, at Everlange (cultivar Achat), the ranges of TGW, TW, GPC and ZSV were 42 to 65 g, 65 to 81 kg hl−1, 11.0% to 15.0% DM, and 21 to 66 ml, respectively. In more than 75% cases, the results indicate that fungicides did not significantly affect TW or ZSV at either sites (P > 0.05). However, there was a significant and positive fungicide effect on GPC in 2006 and 2009 at Burmerange, and only in 2006 at Everlange (P < 0.05). On the contrary, TGW was significantly affected at Burmerange in all years, except 2008 when a positive increase was observed compared to control plots; and in 2006 and 2007 at Everlange. Interestingly, when there was an effect of fungicides on a quality parameter, there was no difference among different fungicide treatments. Thus under conditions prevailing in Luxembourg, a single fungicide treatment applied with judicious timing generally resulted in statistically similar grain quality parameters when compared with a double or triple fungicide treatment. [less ▲]Detailed reference viewed: 23 (0 ULg) X-Ray Emission from Massive Stars in Cyg OB2Rauw, Gregor ; Nazé, Yaël ; Wright, N. J. et alin Astrophysical Journal Supplement Series (2015), 221We report on the analysis of the Chandra-ACIS data of O, B, and WR stars in the young association Cyg OB2. X-ray spectra of 49 O-stars, 54 B-stars, and 3 WR-stars are analyzed and for the brighter sources ... [more ▼]We report on the analysis of the Chandra-ACIS data of O, B, and WR stars in the young association Cyg OB2. X-ray spectra of 49 O-stars, 54 B-stars, and 3 WR-stars are analyzed and for the brighter sources, the epoch dependence of the X-ray fluxes is investigated. The O-stars in Cyg OB2 follow a well-defined scaling relation between their X-ray and bolometric luminosities: log(Lx/Lbol)=-7.2+/- 0.2. This relation is in excellent agreement with the one previously derived for the Carina OB1 association. Except for the brightest O-star binaries, there is no general X-ray overluminosity due to colliding winds in O-star binaries. Roughly half of the known B-stars in the surveyed field are detected, but they fail to display a clear relationship between Lx and Lbol. Out of the three WR stars in Cyg OB2, probably only WR 144 is itself responsible for the observed level of X-ray emission, at a very low log(Lx/Lbol)=-8.8+/- 0.2. The X-ray emission of the other two WR-stars (WR 145 and 146) is most probably due to their O-type companion along with a moderate contribution from a wind–wind interaction zone. [less ▲]Detailed reference viewed: 12 (0 ULg) Active content determination of pharmaceutical tablets using near infrared spectroscopy as Process Analytical Technology toolChavez, Pierre-François ; Sacre, Pierre-Yves ; De Bleye, Charlotte et alin Talanta (2015), 144Detailed reference viewed: 58 (22 ULg) A rocky planet transiting a nearby low-mass starBerta-Thompson, Zachory K.; Irwin, Jonathan; Charbonneau, David et alin Nature (2015), 527M-dwarf stars—hydrogen-burning stars that are smaller than 60 per cent of the size of the Sun—are the most common class of star in our Galaxy and outnumber Sun-like stars by a ratio of 12:1. Recent ... [more ▼]M-dwarf stars—hydrogen-burning stars that are smaller than 60 per cent of the size of the Sun—are the most common class of star in our Galaxy and outnumber Sun-like stars by a ratio of 12:1. Recent results have shown that M dwarfs host Earth-sized planets in great numbers: the average number of M-dwarf planets that are between 0.5 to 1.5 times the size of Earth is at least 1.4 per star. The nearest such planets known to transit their star are 39 parsecs away, too distant for detailed follow-up observations to measure the planetary masses or to study their atmospheres. Here we report observations of GJ 1132b, a planet with a size of 1.2 Earth radii that is transiting a small star 12 parsecs away. Our Doppler mass measurement of GJ 1132b yields a density consistent with an Earth-like bulk composition, similar to the compositions of the six known exoplanets with masses less than six times that of the Earth and precisely measured densities. Receiving 19 times more stellar radiation than the Earth, the planet is too hot to be habitable but is cool enough to support a substantial atmosphere, one that has probably been considerably depleted of hydrogen. Because the host star is nearby and only 21 per cent the radius of the Sun, existing and upcoming telescopes will be able to observe the composition and dynamics of the planetary atmosphere. [less ▲] X-ray emission from the giant magnetosphere of the magnetic O-type star NGC 1624-2Petit, V.; Cohen, D. H.; Wade, G. A. et alin Monthly Notices of the Royal Astronomical Society (2015), 453We observed NGC 1624-2, the O-type star with the largest known magnetic field (B[SUB]p[/SUB] ˜ 20 kG), in X-rays with the Advanced CCD Imaging Spectrometer (ACIS-S) camera on-board the Chandra X-ray ... [more ▼]We observed NGC 1624-2, the O-type star with the largest known magnetic field (B[SUB]p[/SUB] ˜ 20 kG), in X-rays with the Advanced CCD Imaging Spectrometer (ACIS-S) camera on-board the Chandra X-ray Observatory. Our two observations were obtained at the minimum and maximum of the periodic Hα emission cycle, corresponding to the rotational phases where the magnetic field is the closest to equator-on and pole-on, respectively. With these observations, we aim to characterize the star's magnetosphere via the X-ray emission produced by magnetically confined wind shocks. Our main findings are as follows. (i) The observed spectrum of NGC 1624-2 is hard, similar to the magnetic O-type star θ[SUP]1[/SUP] Ori C, with only a few photons detected below 0.8 keV. The emergent X-ray flux is 30 per cent lower at the Hα minimum phase. (ii) Our modelling indicated that this seemingly hard spectrum is in fact a consequence of relatively soft intrinsic emission, similar to other magnetic Of?p stars, combined with a large amount of local absorption (˜1-3× 10[SUP]22[/SUP] cm[SUP]-2[/SUP]). This combination is necessary to reproduce both the prominent Mg and Si spectral features, and the lack of flux at low energies. NGC 1624-2 is intrinsically luminous in X-rays (log L^{em}_X˜ 33.4) but 70-95 per cent of the X-ray emission produced by magnetically confined wind shocks is absorbed before it escapes the magnetosphere (log L^{ISMcor}_X˜ 32.5). (iii) The high X-ray luminosity, its variation with stellar rotation, and its large attenuation are all consistent with a large dynamical magnetosphere with magnetically confined wind shocks. [less ▲]Detailed reference viewed: 17 (0 ULg) Surface Constrained Elastic Rods with Application to the SphereHuynen, Alexandre ; Detournay, Emmanuel; Denoël, Vincent in Journal of Elasticity (2015)The unilateral contact between an elastic rod and a rigid surface is encountered in numerous biological and engineering applications. Along continuous contacts, the centerline of the rod reflects the ... [more ▼]The unilateral contact between an elastic rod and a rigid surface is encountered in numerous biological and engineering applications. Along continuous contacts, the centerline of the rod reflects the geometry of the constraining surface. This restriction of the rod axis to surface bound configurations enters its local equilibrium through a reaction pressure which ensures the compatibility between the deformation and the restraint geometry. The classic equations governing the static equilibrium of elastic rods are particularized to surface bound configurations by (i) specifying the location of the rod axis in terms of its coordinates in the parameter space associated with the constraining surface parameterization, and (ii) characterizing the orientation of its material frame through its rotation with respect to the surface normal. This formulation, which emphasizes the relations between the rod configuration and the geometry of the constraint, also leads to an expression for the reaction pressure. This approach is then validated on a spherical surface by comparing with known solutions for elastic curves, i.e., inextensible and twist free rods. [less ▲]Detailed reference viewed: 30 (4 ULg) Numerical modelling of transient cyclic vertical loading of suction caissons in sandCerfontaine, Benjamin ; Collin, Frédéric ; Charlier, Robert in Geotechnique (2015), 65(12), This paper presents numerical investigations of the monotonic and cyclic behaviours of suction caissons upon vertical transient loading. Both drained and partially drained conditions are investigated ... [more ▼]This paper presents numerical investigations of the monotonic and cyclic behaviours of suction caissons upon vertical transient loading. Both drained and partially drained conditions are investigated. Monotonic compression and traction simulations are carried out to qualitatively compare results with the literature and validate the model. They highlight the different modes of reaction of the caisson to both compression and traction loading. A sensitivity analysis points out the strong influence of some parameters on the resistance of the caisson but also on the failure mechanism. The transient behaviour of the caisson upon different kinds of cyclic load signals is analysed. Results reproduce the settlement and pore water pressure accumulations observed during experiments. The influence of the key design parameters on the settlement accumulation is also assessed. Finally a cyclic diagram is proposed to describe the evolution of the final settlement upon different magnitudes of loading. [less ▲]Detailed reference viewed: 16 (2 ULg) The Expropriation of YPF from Repsol in the Argentine Press: Analyzing Framing in Opinion Pieces through Rhetorical CriticismAzpíroz Manero, María Luisa in Doxa Comunicación : Revista Interdisciplinar de Estudios de Comunicación y Ciencias Sociales (2015), (21), 33-53This article examines how opinion articles in the Argentine press framed the government's expropriation of Yacimientos Petrolíferos Fiscales (YPF) from Repsol in 2012. By understanding frames as ... [more ▼]This article examines how opinion articles in the Argentine press framed the government's expropriation of Yacimientos Petrolíferos Fiscales (YPF) from Repsol in 2012. By understanding frames as narratives composed by the interrelation of the functions of frame, and adopting Kuper's proposal to analyze framing from the perspective of rhetorical criticism, this study focuses on two newspapers with opposing editorial lines (La Nación and Página 12) and identifies two different narratives shaping the reporting of this story. The results also reveal two different views of the role of the market and the state in the economy and in the management of energy resources. [less ▲]Detailed reference viewed: 24 (3 ULg) Posttraumatisches Puppen-Syndrom. Gedanken zu Jean Michel d'Hoops Inszenierung "Borgia. Comédie contemporaine"Wunsch-Viehöver, Vera in Das Andere Theater (2015), 88Detailed reference viewed: 11 (0 ULg) Le crime de masse en criminologiePierre, Alexia in Revue de Science Criminelle et de Droit Pénal Comparé (2015), 3(juillet/septembre), 627-637Despite the increasing number of mass crimes and mass victimisations, these topics remain marginal in criminology when they are not linked to terrorism. While the characteristics of mass crimes seem to ... [more ▼]Despite the increasing number of mass crimes and mass victimisations, these topics remain marginal in criminology when they are not linked to terrorism. While the characteristics of mass crimes seem to meet the characteristics of a criminological object of research, they remain mostly studied through history, sociology, psychology or policy studies. The following analysis is an exploration of three issues that can explain the weakness of interest in mass crimes by the criminologists. These aspects, encompassing psychological, epistemological or practical issues, may lead to a disciplinary approach that is far from mass crimes specificities, or may not allow to explore the complex wholeness of such topics. A criminology of mass crimes, conducive to an exploration of the current criminal realities, is needed to understand the current global phenomena. Indeed, the numerous and worldwide massive abuses against civilians must lead the criminologists to take them into concern and to develop principles of prevention. Analysis, aware of the specificities of mass crimes, and leading to an in depth understanding of mass crimes issues, must be the foundation of these principles. [less ▲]Detailed reference viewed: 17 (2 ULg) COMMENT EXPLORER LES SYMPTOMES NEGATIFS DE LA PSYCHOSE CHEZ L'ENFANT: UNE SEMIOLOGIE DIMENSIONNELLESCHOLL, Jean-Marc in Acta Psychiatrica Belgica (2015), 117Despite its high frequency, psychotic syndrome in childhood is little understood and is often diagnosed only after several years of development, and this during a time when the child’s psychosocial future ... [more ▼]Despite its high frequency, psychotic syndrome in childhood is little understood and is often diagnosed only after several years of development, and this during a time when the child’s psychosocial future is at stake. Negative symptoms are systematically present at the prodromal phase and are the most stable thereafter. It is therefore essential to furnish clinicians with precise semiological markers to recognize it. This paper presents a dimensional semiology of the negative symptoms for use in anamnesis and in clinical observation of the child. Is also gives a guide to the interviewing process. [less ▲]Detailed reference viewed: 13 (3 ULg) Modernisation des institutions judiciaires belges: vers un management de type 2.0Schoenaers, Frédéric in Cahiers de la Sécurité (2015), 32Detailed reference viewed: 20 (2 ULg) The harmonic balance method for bifurcation analysis of large-scale nonlinear mechanical systemsDetroux, Thibaut ; Renson, Ludovic ; Masset, Luc et alin Computer Methods in Applied Mechanics and Engineering (2015), 296The harmonic balance (HB) method is widely used in the literature for analyzing the periodic solutions of nonlinear mechanical systems. The objective of this paper is to exploit the method for bifurcation ... [more ▼]The harmonic balance (HB) method is widely used in the literature for analyzing the periodic solutions of nonlinear mechanical systems. The objective of this paper is to exploit the method for bifurcation analysis, i.e., for the detection and tracking of bifurcations of nonlinear systems. To this end, an algorithm that combines the computation of the Floquet exponents with bordering techniques is developed. A new procedure for the tracking of Neimark–Sacker bifurcations that exploits the properties of eigenvalue derivatives is also proposed. The HB method is demonstrated using numerical experiments of a spacecraft structure that possesses a nonlinear vibration isolation device. [less ▲]Detailed reference viewed: 28 (7 ULg) Tentative insight into the multiplicity of the persistent dust maker WR 106 from X-ray observationsDe Becker, Michaël in New Astronomy (2015), 41This paper presents the results of the analysis of the very first dedicated X-ray observation with XMM-Newton of WR 106. This carbon-rich WC9d Wolf–Rayet star belongs to the category of persistent dust ... [more ▼]This paper presents the results of the analysis of the very first dedicated X-ray observation with XMM-Newton of WR 106. This carbon-rich WC9d Wolf–Rayet star belongs to the category of persistent dust makers (WCd stars). The issue of the multiplicity of these dust makers is pivotal to understand the dust formation process, and in this context X-ray observations may allow to reveal an X-ray emission attributable to colliding-winds in a binary system. The main result of this analysis is the lack of detection of X-rays coming from WR 106. Upper limits on the X-ray flux are estimated, but the derived numbers are not sufficient to provide compelling constraints on the existence or not of a colliding-wind region. Detailed inspection of archive data bases reveals that persistent dust makers have been poorly investigated by the most sensitive X-ray observatories. Certainly, the combination of several approaches to indirectly constrain their multiplicity should be applied to lift a part of the veil on the nature of these persistent dust makers. [less ▲]Detailed reference viewed: 32 (2 ULg) Amphibians forgo aquatic life in response to alien fish introductionWinandy, Laurane ; Darnet, Elodie; Denoël, Mathieu in Animal Behaviour (2015), 109Species with complex life cycles are good models to understand trade-offs between life in hostile and favourable habitats. Newts remain in breeding wetlands for a long period and are strongly affected by ... [more ▼]Species with complex life cycles are good models to understand trade-offs between life in hostile and favourable habitats. Newts remain in breeding wetlands for a long period and are strongly affected by fish introduction; however, mechanisms of the exclusion observed in the field are still not well known. In particular, whether newts skip breeding and leave water for land in response to fish introduction and how aquatic shelter may influence their choice remain open questions. To investigate these questions, we experimentally studied the use of aquatic and terrestrial habitats during the breeding season of palmate newts, Lissotriton helveticus, in the presence and absence of goldfish, Carassius auratus. We determined the consequences of habitat choice on newt fitness by assessing sexual activity and number of eggs. There was a strong, significant avoidance of the aquatic environment in the presence of fish, particularly when no aquatic shelter was available. This escape from the water had an impact on reproduction: newts decreased their sexual activity and laid fewer eggs. The availability of shelters favoured coexistence but did not prevent a large proportion of the newts from leaving water and skipping reproduction. This study shows how the presence of fish and the absence of aquatic shelters can lead to newts forgoing aquatic life, thus improving our understanding of the mechanisms behind the coexistence and exclusion patterns found in the wild. More broadly, these data contribute to explaining aquatic versus terrestrial life in favourable and unfavourable environments. [less ▲]Detailed reference viewed: 189 (39 ULg) The aggressive personality of an introduced fish affects foraging behavior in a polymorphic newtWinandy, Laurane ; Denoël, Mathieu in Behavioral Ecology (2015), 26(6), 1528-1536The study of personality has aroused much interest and has provided insight into the understanding of animal behavior. Nevertheless, the study of the ecological consequences of personality is a newer ... [more ▼]The study of personality has aroused much interest and has provided insight into the understanding of animal behavior. Nevertheless, the study of the ecological consequences of personality is a newer field that could shed light on cases of alien species introductions. The goldfish (Carassius auratus) is frequently introduced worldwide and affects the abundance of newts, having an especially negative impact on an alternative phenotype, the paedomorph, which maintains larval traits at the adult stage, unlike the other phenotype, the metamorph, which has undergone metamorphosis. We experimentally assessed the impact of goldfish on the foraging behavior of both phenotypes of palmate newts (Lissotriton helveticus). More particularly, we assessed fish personality by analyzing the foraging activity and the aggressiveness toward newts, and newt personality by analyzing individual difference in boldness. In the presence of fish, fewer newts foraged than in their absence, and paedomorphs were more affected than metamorphs. We found strong personality differences in fish and fewer newts foraged in the presence of a more aggressive fish. Newts differed in boldness, but fish aggressiveness remains a key factor to explain newt behavior. Studying behavioral interactions between native and alien species helps to understand the mechanisms of coexistence and exclusion and why different phenotypes might be affected differently by the same threat. To a great extent, not only the presence of fish alters the foraging opportunities of newts but also the personality of the invader; integrating personality patterns of invaders is therefore a key to understanding the ecological consequences of alien species introduction. [less ▲]Detailed reference viewed: 147 (75 ULg) Métroplasties (utéruse en T après l'ère DES, septum): quel bénéfice?BRICHANT, Géraldine ; CLOSON, François ; MASEREEL, Marie-Caroline et alin Louvain Medical (2015), 134Mûllerian anomalies are associated with infertility and obstetric complications, such as recurrent pregnancy loss, preterm labor or birth, as well as malpresentation. The most common anomalies inlude ... [more ▼]Mûllerian anomalies are associated with infertility and obstetric complications, such as recurrent pregnancy loss, preterm labor or birth, as well as malpresentation. The most common anomalies inlude septate uterus, uterus bicornuate, and uterus didelphys (Class II and III according to ESHRE/ESGE classification). Hypoplastic uteri are rare, being usually caused by in utero exposure to diethylstilbestrol. Hysteroscopic metroplasty has been shown to improve both fertility and obstetrical outcomes in patients with hypoplastic or septate uterus [less ▲]Detailed reference viewed: 12 (2 ULg) The genome of a tortoise herpesvirus (testudinid herpesvirus 3) has a novel structure and contains a large region that is not required for replication in vitro or virulence in vivo.Gandar, Frederic ; Wilkie, Gavin S.; Gatherer, Derek et alin Journal of Virology (2015), 89(22), 11438-11456Testudinid herpesvirus 3 (TeHV-3) is the causative agent of a lethal disease affecting several tortoise species. The threat that this virus poses to endangered animals is focusing efforts on ... [more ▼]Testudinid herpesvirus 3 (TeHV-3) is the causative agent of a lethal disease affecting several tortoise species. The threat that this virus poses to endangered animals is focusing efforts on characterizing its properties, in order to enable the development of prophylactic methods. We have sequenced the genomes of the two most studied TeHV-3 strains (1976 and 4295). TeHV-3 strain 1976 has a novel genome structure and is most closely related to a turtle herpesvirus, thus supporting its classification into genus Scutavirus, subfamily Alphaherpesvirinae, family Herpesviridae. The sequence of strain 1976 also revealed viral counterparts of cellular interleukin-10 and semaphorin, which have not been described previously in members of subfamily Alphaherpesvirinae. TeHV-3 strain 4295 is a mixture of three forms (m1, m2, and M), in which, in comparison to strain 1976, the genomes exhibit large, partially overlapping deletions of 12.5 to 22.4 kb. Viral subclones representing these forms were isolated by limiting dilution assays, and each replicated in cell culture comparably to strain 1976. With the goal of testing the potential of the three forms as attenuated vaccine candidates, strain 4295 was inoculated intranasally into Hermann's tortoises (Testudo hermanni). All inoculated subjects died, and PCR analyses demonstrated the ability of the m2 and M forms to spread and invade the brain. In contrast, the m1 form was detected in none of the organs tested, suggesting its potential as the basis of an attenuated vaccine candidate. Our findings represent a major step toward characterizing TeHV-3 and developing prophylactic methods against it. [less ▲]Detailed reference viewed: 28 (8 ULg) Histoires sur Able ArcherKluge, Alexander; Leyh, Valérie in Cahiers d'Etudes Germaniques (2015), 69Detailed reference viewed: 18 (2 ULg) Lire entre les actes. Le théâtre mis en pièces par le récit d’anticipationStienon, Valérie in Tropics (2015), 2Si les histoires de la littérature française font généralement peu de cas du roman d’anticipation, rendu invisible aux sélections de la postérité par la variété de ses désignations génériques, l’hybridité ... [more ▼]Si les histoires de la littérature française font généralement peu de cas du roman d’anticipation, rendu invisible aux sélections de la postérité par la variété de ses désignations génériques, l’hybridité de ses formes et les discontinuités de son, ce dernier, en revanche, semble avoir des choses à dire au sujet de la littérature. Encore faut-il préciser de quel théâtre il est question dans ces anticipations, et dans quelle mesure il est possible de lire l’inscription d’un genre à travers la poétique d’un autre. Les thématisations du théâtre sont passibles d’une caractérisation multiforme impliquant des données d’ordre poétique, contextuel et historique. Plus qu’une définition de cette référence, la lecture transversale et diachronique de 1860 à 1930 qui suit entend formuler une interrogation sur les modalités de son traitement. Le théâtre participe-t-il, comme la poésie et le roman, et au même titre qu’eux, de la décadence anticipée des Lettres, signe d’un déclin général dont il prendrait acte à sa mesure ? Un genre ou un registre (drame, comédie, tragédie, boulevard, music-hall, vaudeville, opérette, etc.) est-il mis en évidence, ou ceux-ci sont-ils plutôt indifférenciés, voire présentés comme équivalents ? Ces considérations révèlent-elles une hybridation ou une remise en question des classements micro- et macro-génériques ? [less ▲]Detailed reference viewed: 18 (0 ULg) Comptes-rendus de thèses soutenues. "La relation partenariale sous l'angle de la confiance: De l'autonomisation à la capacitation"Remy, Céline in Revue Française de Socio-Economie (2015), 16Detailed reference viewed: 25 (3 ULg) Adult bone marrow mesenchymal and neural crest stem cells are chemoattractive and accelerate motor recovery in a mouse model of spinal cord injuryNeirinckx, Virginie ; Agirman, Gulistan ; Coste, Cécile et alin Stem Cell Research and Therapy (2015), 6(211), Introduction: Stem cells from adult tissues were considered for a long time as promising tools for regenerative therapy of neurological diseases, including spinal cord injuries (SCI). Indeed, mesenchymal ... [more ▼]Introduction: Stem cells from adult tissues were considered for a long time as promising tools for regenerative therapy of neurological diseases, including spinal cord injuries (SCI). Indeed, mesenchymal (MSCs) and neural crest stem cells (NCSCs) together constitute the bone marrow stromal stem cells (BMSCs) that were used as therapeutic options in various models of experimental SCI. However, as clinical approaches remained disappointing, we thought that reducing BMSC heterogeneity should be a potential way to improve treatment efficiency and reproducibility. Methods: We investigated the impact of pure populations of MSCs and NCSCs isolated from adult bone marrow in a mouse model of spinal cord injury. We then analyzed the secretome of both MSCs and NCSCs, and its effect on macrophage migration in vitro. Results: We first observed that both cell types induced motor recovery in mice, and modified the inflammatory reaction in the lesion site. We also demonstrated that NCSCs but especially MSCs were able to secrete chemokines and attract macrophages in vitro. Finally, it appears that MSC injection in the spinal cord enhance early inflammatory events in the blood and spinal cord of SCI mice. Conclusions: Altogether, our results suggest that both cell types have beneficial effects in experimental SCI, and that further investigation should be dedicated to the regulation of the inflammatory reaction following SCI, in the context of stem cell-based therapy but also in the early-phase clinical management of SCI patients. [less ▲]Detailed reference viewed: 23 (5 ULg) Opportunités pour la valorisation des végétaux riches en anthocyanes comme sources de colorants alimentaires (synthèse bibliographique)Beye, Cheikh ; Tounkara, Lat Souk; Seck, Mamadou Amadou et alin Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2015), 19(4), 392-401Introduction. Très répandues dans le règne végétal, les anthocyanes sont le sujet d’un grand nombre d’études qui abordent en général les aspects concernant leur instabilité vis-à-vis des conditions dans ... [more ▼]Introduction. Très répandues dans le règne végétal, les anthocyanes sont le sujet d’un grand nombre d’études qui abordent en général les aspects concernant leur instabilité vis-à-vis des conditions dans lesquelles elles sont employées ou l’effet bénéfique de leur consommation sur la santé. Littérature. Ces aspects sont particulièrement importants lorsqu’on envisage de les extraire en vue de leur utilisation comme colorant alimentaire naturel. Dans cette revue bibliographique, les propriétés des anthocyanes susceptibles d’être altérées lors de leur transformation ont été étudiées. Par la suite, un état des lieux sur les méthodes de fabrication de colorants à base d’anthocyanes a été fait afin de dégager des perspectives pour l’exploitation des matières végétales qui en contiennent de grandes quantités. Conclusions. Les fruits et légumes utilisables pour la fabrication de colorants alimentaires sont nombreux et variés. Les différences au niveau du contenu ont une influence sur la stabilité de la couleur des extraits, mais les progrès récents en matière de formulation ouvrent des perspectives pour la valorisation des végétaux riches en anthocyanes. [less ▲]Detailed reference viewed: 7 (0 ULg) La collection "Poétique" : terre d'accueilLorent, Fanny in A l'épreuve (2015), 2Detailed reference viewed: 16 (3 ULg) Symptômes neurologiques du bord latéral du pied et de la chevilleWANG, François-Charles in Médecine et Chirurgie du Pied = Foot Medicine and Surgery (2015), 31Detailed reference viewed: 13 (0 ULg) A Parallel Processing Approach to Dynamic Simulations of Combined Transmission and Distribution SystemsAristidou, Petros ; Van Cutsem, Thierry in International Journal of Electrical Power & Energy Systems (2015), 72Simulating a power system with both transmission and distribution networks modeled in detail is a huge computational challenge. In this paper, a Schur-complement-based domain decomposition algorithm is ... [more ▼]Simulating a power system with both transmission and distribution networks modeled in detail is a huge computational challenge. In this paper, a Schur-complement-based domain decomposition algorithm is proposed to provide accurate, detailed dynamic simulations of such systems. The simulation procedure is accelerated with the use of parallel programming techniques, taking advantage of the parallelization opportunities inherent to domain decomposition algorithms. The proposed algorithm is general, portable and scalable on inexpensive, shared-memory, multi-core machines. A large-scale test system is used for its performance evaluation. [less ▲]Detailed reference viewed: 80 (14 ULg) Derivation and Application of Sensitivities to Assess Transient Voltage Sags caused by Rotor SwingsWeckesser, Tilman; Johannsson, Hjortur; Ostergaard, Jacob et alin International Journal of Electrical Power & Energy Systems (2015), 72The paper introduces an approach to investigate voltage sags, which are caused by large generator rotor swings following a transient disturbance. Therefore, the method exploits sensitivities derived from ... [more ▼]The paper introduces an approach to investigate voltage sags, which are caused by large generator rotor swings following a transient disturbance. Therefore, the method exploits sensitivities derived from the algebraic network equations. These provide information on the impact of a generator on the voltage magnitude at a load bus and the e ffect of load variation on the generator's power injection. It is shown that these sensitivities give valuable information to identify critical generator-load pairs and locations for applying preventive control measures. [less ▲]Detailed reference viewed: 41 (6 ULg) Le pouvoir des sentiments : Kluge, Adorno, FerencziHamers, Jérémy ; Cormann, Grégory in Cahiers d'Etudes Germaniques (2015), 69Detailed reference viewed: 47 (15 ULg) Finite element modelling of composite structures under crushing loadChiu, Louis N.S.; Falzon, Brian G.; Boman, Romain et alin Composite Structures (2015), 131This paper details the theory and implementation of a composite damage model, addressing damage within a ply (intralaminar) and delamination (interlaminar), developed for the simulation of the crushing of ... [more ▼]This paper details the theory and implementation of a composite damage model, addressing damage within a ply (intralaminar) and delamination (interlaminar), developed for the simulation of the crushing of laminated composite structures. It includes a more accurate determination of the characteristic length to achieve mesh objectivity in capturing intralaminar damage consisting of matrix cracking and fibre failure, a load-history dependent material response, an isotropic hardening nonlinear matrix response, as well as a more physically-based interactive matrix damage mechanism. The developed damage model requires a set of material parameters obtained from a combination of standard and non-standard material characterisation tests. The fidelity of the model mitigates the need to manipulate, or “calibrate”, the input data to achieve good agreement with experimental results. This intralaminar damage model was implemented as a VUMAT subroutine, and used in conjunction with an existing interlaminar damage model, in Abaqus/Explicit. This approach was validated through the simulation of the crushing of a cross-ply composite tube with a tulip-shaped trigger, loaded in uniaxial compression. Despite the complexity of the chosen geometry, excellent correlation was achieved with experimental results. [less ▲]Detailed reference viewed: 23 (6 ULg) Avant-proposCormann, Grégory ; Hamers, Jérémy ; Letawe, Céline in Cahiers d'Etudes Germaniques (2015)Detailed reference viewed: 25 (4 ULg) Belgian Wildlife as Potential Zoonotic Reservoir of Hepatitis E virusThiry, Damien ; Mauroy, Axel ; Saegerman, Claude et alin Transboundary and Emerging Diseases (2015)Detailed reference viewed: 16 (6 ULg) Allelic variation contributes to bacterial host specificityYue, Min; Han, Xiangan; De Masi, Leon et alin Nature Communications (2015)Understanding the molecular parameters that regulate cross-species transmission and host adaptation of potential pathogens is crucial to control emerging infectious disease. Although microbial pathotype ... [more ▼]Understanding the molecular parameters that regulate cross-species transmission and host adaptation of potential pathogens is crucial to control emerging infectious disease. Although microbial pathotype diversity is conventionally associated with gene gain or loss, the role of pathoadaptive nonsynonymous single-nucleotide polymorphisms (nsSNPs) has not been systematically evaluated. Here, our genome-wide analysis of core genes within Salmonella enterica serovar Typhimurium genomes reveals a high degree of allelic variation in surface-exposed molecules, including adhesins that promote host colonization. Subsequent multinomial logistic regression, MultiPhen and Random Forest analyses of known/suspected adhesins from 580 independent Typhimurium isolates identifies distinct host-specific nsSNP signatures. Moreover, population and functional analyses of host-associated nsSNPs for FimH, the type 1 fimbrial adhesin, highlights the role of key allelic residues in host-specific adherence in vitro. Together, our data provide the first concrete evidence that functional differences between allelic variants of bacterial proteins likely contribute to pathoadaption to diverse hosts. [less ▲]Detailed reference viewed: 12 (2 ULg) A prospective 4 year study of the objective and subjective outcomes of 15 patients after dynamic facial reanimation surgery.ANDREWS, Peter J; RANDHAWA, Premjit S; JOSEPH, Jonathan et alin Clinical Otolaryngology (2015)Facial nerve palsy is a debilitating and life changing event which significantly affects quality of life. This prospective study evaluates outcomes in 15 patients undergoing dynamic facial reanimation ... [more ▼]Facial nerve palsy is a debilitating and life changing event which significantly affects quality of life. This prospective study evaluates outcomes in 15 patients undergoing dynamic facial reanimation surgery using a modification of the minimally invasive temporalis tendon transposition technique (MIT3) coupled with either static reanimation techniques or synergistic inter-positional/facial-hypoglossal nerve reconstruction techniques. All patients demonstrated significant improvement both objectively and subjectively as measured by the SMILE system and FaCE scale respectively. The MIT3 technique can be used successfully for dynamic reanimation and allows for other techniques to be simultaneously tailored around it. It provides improved functional and quality of life outcomes in patients and affords low morbidity. [less ▲]Detailed reference viewed: 14 (0 ULg) A PHEROMONE TRAP MONITORING SYSTEM FOR THE SADDLE GALL MIDGE, Haplodiplosis marginata (von Roser) (DIPTERA: CECIDOMYIIDAE)Censier, Florence ; Heuskin, Stéphanie ; SAN MARTIN Y GOMEZ, Gilles et alin Crop Protection (2015), 80Outbreaks of saddle gall midge, Haplodiplosis marginata (von Roser) (Diptera: Cecidomyiidae) have been reported in Belgium and other European countries since 2010. Because of the sporadic nature of this ... [more ▼]Outbreaks of saddle gall midge, Haplodiplosis marginata (von Roser) (Diptera: Cecidomyiidae) have been reported in Belgium and other European countries since 2010. Because of the sporadic nature of this pest, which can sometimes be very harmful to cereal crops, an effective monitoring tool is required, both to determine the optimal timing for insecticide applications, and to understand the enigmatic population dynamics of this insect. Following the recent identification of the major sex pheromone component of the saddle gall midge, non-2-yl butanoate, a slow-release dispenser was developed using rubber septa. The release rates of 5 mg and 10 mg-loaded dispensers were initially measured under laboratory conditions, and their effectiveness in terms of pheromone loading and use duration was assessed in the field. The experiments showed that sticky traps baited with 5 mg pheromone-loaded rubber dispensers, renewed every 6 weeks, are suitable for accurately monitoring male H. marginata flights. [less ▲]Detailed reference viewed: 31 (9 ULg) Divergent biophysical controls of aquatic CO2 and CH4 in the World’s two largest riversBorges, Alberto ; Abril, G; Darchambeau, François et alin Scientific Reports (2015), 5Carbon emissions to the atmosphere from inland waters are globally significant and mainly occur at tropical latitudes. However, processes controlling the intensity of CO2 and CH4 emissions from tropical ... [more ▼]Carbon emissions to the atmosphere from inland waters are globally significant and mainly occur at tropical latitudes. However, processes controlling the intensity of CO2 and CH4 emissions from tropical inland waters remain poorly understood. Here, we report a data-set of concurrent measurements of the partial pressure of CO2 (pCO2) and dissolved CH4 concentrations in the Amazon (n = 136) and the Congo (n = 280) Rivers. The pCO2 values in the Amazon mainstem were significantly higher than in the Congo, contrasting with CH4 concentrations that were higher in the Congo than in the Amazon. Large-scale patterns in pCO2 across different lowland tropical basins can be apprehended with a relatively simple statistical model related to the extent of wetlands within the basin, showing that, in addition to non-flooded vegetation, wetlands also contribute to CO2 in river channels. On the other hand, dynamics of dissolved CH4 in river channels are less straightforward to predict, and are related to the way hydrology modulates the connectivity between wetlands and river channels. [less ▲]Detailed reference viewed: 49 (7 ULg) Le nouveau régime de tax shelter pour la production audiovisuelleVandenbulke, Antoine in Journal des Tribunaux (2015)Description of the new tax shelter scheme in Belgium for companies wishing to invest in the production of an audiovisual work (Article 194ter CIR/1992), set up by the Law of May 12, 2014.Detailed reference viewed: 25 (9 ULg) La Cour constitutionnelle à nouveau au secours des ouvriersKéfer, Fabienne in Revue de Jurisprudence de Liège, Mons et Bruxelles (2015), (35), 1685-1687L'étude commente l'arrêt 116/2015 de la Cour constitutionnelle annulant l'article 70, §4, de la loi sur le statut unique ainsi que l'alinéa de l’article 97 de la même loi, prévoyant l’exclusion permanente ... [more ▼]L'étude commente l'arrêt 116/2015 de la Cour constitutionnelle annulant l'article 70, §4, de la loi sur le statut unique ainsi que l'alinéa de l’article 97 de la même loi, prévoyant l’exclusion permanente des ouvriers visés (une bonne partie des ouvriers de la construction) du bénéfice du régime uniforme des délais de préavis et la privation du droit à l’indemnité en compensation du licenciement. Le résultat de l'arrêt est que, jusqu’au 31 décembre 2017, les différences de traitement au détriment de certaines catégories d’ouvriers sont maintenues. Après cette date, l’article 70, paragraphe 4, disparaît de l’ordre juridique. L’article 70 sera, dans sa totalité, sans objet puisque la période transitoire aura pris fin. Tous les travailleurs, qu’ils soient ouvriers ou employés, seront égaux en droit : soit les durées seront identiques, soit la différence sera compensée par une indemnité spécifique à charge de l’ONEm. [less ▲]Detailed reference viewed: 21 (2 ULg) Interpreting canopy development and physiology using a European phenology camera network at flux sitesWingate, L.; Ogée, J.; Cremonese, E. et alin Biogeosciences (2015), 12(10), 5995-6015Plant phenological development is orchestrated through subtle changes in photoperiod, temperature, soil moisture and nutrient availability. Presently, the exact timing of plant development stages and ... [more ▼]Plant phenological development is orchestrated through subtle changes in photoperiod, temperature, soil moisture and nutrient availability. Presently, the exact timing of plant development stages and their response to climate and management practices are crudely represented in land surface models. As visual observations of phenology are laborious, there is a need to supplement long-term observations with automated techniques such as those provided by digital repeat photography at high temporal and spatial resolution. We present the first synthesis from a growing observational network of digital cameras installed on towers across Europe above deciduous and evergreen forests, grasslands and croplands, where vegetation and atmosphere CO2 fluxes are measured continuously. Using colour indices from digital images and using piecewise regression analysis of time series, we explored whether key changes in canopy phenology could be detected automatically across different land use types in the network. The piecewise regression approach could capture the start and end of the growing season, in addition to identifying striking changes in colour signals caused by flowering and management practices such as mowing. Exploring the dates of green-up and senescence of deciduous forests extracted by the piecewise regression approach against dates estimated from visual observations, we found that these phenological events could be detected adequately (RMSE < 8 and 11 days for leaf out and leaf fall, respectively). We also investigated whether the seasonal patterns of red, green and blue colour fractions derived from digital images could be modelled mechanistically using the PROSAIL model parameterised with information of seasonal changes in canopy leaf area and leaf chlorophyll and carotenoid concentrations. From a model sensitivity analysis we found that variations in colour fractions, and in particular the late spring `green hump' observed repeatedly in deciduous broadleaf canopies across the network, are essentially dominated by changes in the respective pigment concentrations. Using the model we were able to explain why this spring maximum in green signal is often observed out of phase with the maximum period of canopy photosynthesis in ecosystems across Europe. Coupling such quasi-continuous digital records of canopy colours with co-located CO2 flux measurements will improve our understanding of how changes in growing season length are likely to shape the capacity of European ecosystems to sequester CO2 in the future. [less ▲]Detailed reference viewed: 19 (2 ULg) Applying participatory approaches in the evaluation of surveillance systems: A pilot study on African swine fever surveillance in Corsica.Calba, Clémentine; Antoine-Moussiaux, Nicolas ; Charrier, François et alin Preventive Veterinary Medicine (2015)The implementation of regular and relevant evaluations of surveillance systems is critical in improving their effectiveness and their relevance whilst limiting their cost. The complex nature of these ... [more ▼]The implementation of regular and relevant evaluations of surveillance systems is critical in improving their effectiveness and their relevance whilst limiting their cost. The complex nature of these systems and the variable contexts in which they are implemented call for the development of flexible evaluation tools. Within this scope, participatory tools have been developed and implemented for the African swine fever (ASF) surveillance system in Corsica (France). The objectives of this pilot study were, firstly, to assess the applicability of participatory approaches within a developed environment involving various stakeholders and, secondly, to define and test methods developed to assess evaluation attributes. Two evaluation attributes were targeted: the acceptability of the surveillance system and its the non-monetary benefits. Individual semi-structured interviews and focus groups were implemented with representatives from every level of the system. Diagramming and scoring tools were used to assess the different elements that compose the definition of acceptability. A contingent valuation method, associated with proportional piling, was used to assess the non-monetary benefits, i.e., the value of sanitary information. Sixteen stakeholders were involved in the process, through 3 focus groups and 8 individual semi-structured interviews. Stakeholders were selected according to their role in the system and to their availability. Results highlighted a moderate acceptability of the system for farmers and hunters and a high acceptability for other representatives (e.g., private veterinarians, local laboratories). Out of the 5 farmers involved in assessing the non-monetary benefits, 3 were interested in sanitary information on ASF. The data collected via participatory approaches enable relevant recommendations to be made, based on the Corsican context, to improve the current surveillance system. [less ▲]Detailed reference viewed: 12 (0 ULg) A ‘nodeless’ dual superelement formulation for structural and multibody dynamics application to reduction of contact problemsGéradin, Michel ; Rixen, Danielin International Journal for Numerical Methods in Engineering (2015)Detailed reference viewed: 14 (2 ULg) Inherited determinants of Crohn's disease and ulcerative colitis phenotypes: a genetic association studyCleynen, Isabelle; Boucher, Gabrielle; Jostins, Luke et alin Lancet (2015)Detailed reference viewed: 305 (10 ULg) Comment améliorer la réussite à l’examen d’anatomie en 1re année de bachelier en médecine? Étude de l’impact d’une activité intégrée dans un dispositif hybride de formationErnst, Denise ; Van de Poël, Jean-François ; Verpoorten, Dominique et alin Revue Internationale des Technologies en Pédagogie Universitaire = International Journal of Technologies in Higher Education (2015), 11(3), 51-67The course of “Introduction to Human Anatomy” is part of the curriculum delivered to the undergraduated students (Freshman year) at the Faculty of Medecine of the University of Liege. The course is taught ... [more ▼]The course of “Introduction to Human Anatomy” is part of the curriculum delivered to the undergraduated students (Freshman year) at the Faculty of Medecine of the University of Liege. The course is taught in a blending learning mode combining traditional intructor-led and e-learning activities. The MCQ 2 test is one of the three components of the final written exam (which consists of 3 MCQtests). This test requires students to recognize and identify the organ’s orientation in cross-sections represented in different spatial views. In our study, we tried to evaluate how the online training exercises provided by the instructors team for that particular ability was appreciated by students and if students benefited from this type of online activities to improve their examination results for MCQ 2 test. Further in our research, we asked student about their perceptions of coherence between the aims, methods and evaluation of our entire system. Then this perception has been compared with the overall score of the exam to look for the present of correlation elements. We observed that the MCQ 2 test results are significantly better for students who practiced the new online exercises and for students having seen the value of this activity. The perception of consistency or coherence between the objectives, methods and assessment is not correlated to the overall score of the student. As conclusion, we can declare that the new learning scenario proposed positively enriches the learning environment for students. It can be easily scaled up for important groups and accessed at any time by users. It focusses on specific objectives, is directly linked to the examination system of the course (MCQ 2) and also allows developing a competence expertise related to their future medical profession. [less ▲]Detailed reference viewed: 29 (16 ULg) Shear banding modelling in cross-anisotropic rocksPardoen, Benoît ; Seyedi, D.M.; Collin, Frédéric in International Journal of Solids and Structures (2015), 72Sedimentary geomaterials such as rocks frequently exhibit cross-anisotropic properties and their behaviour depends on the direction of loading with respect to their microstructure. As far as material ... [more ▼]Sedimentary geomaterials such as rocks frequently exhibit cross-anisotropic properties and their behaviour depends on the direction of loading with respect to their microstructure. As far as material rupture is concerned, localised deformation in shear band mode appears generally before cracks and material failure. The influence of cross-anisotropy on the shear strain localisation remains an important issue and is investigated in the present study. To do so, a constitutive elastoplastic cross-anisotropic model that includes anisotropy both on the elastic and plastic characteristics is defined. For the plastic part of the model, the anisotropy of a strength parameter is introduced with a microstructure fabric tensor. Then, the fractures are modelled with finite element methods by considering the development of shear strain localisation bands and an enriched model is used to properly reproduce the shear banding. The cross-anisotropy influence on shear banding is studied through numerical applications of small and large-scale geotechnical problems that engender fractures. The two considered applications are a plane-strain biaxial compression test and an underground gallery excavation. The numerical results provide information about the influence of cross-anisotropy on the appearance and development of shear bands. It has been noticed, among other observations, that the material strength vary with the loading direction and that the development and the shape of the excavation fractured zone that develops around a gallery is strongly influenced by the material anisotropy. [less ▲]Detailed reference viewed: 36 (11 ULg) Direct exoplanet detection and characterization using the ANDROMEDA method: Performance on VLT/NaCo dataCantalloube, F.; Mouillet, D.; Mugnier, L. M. et alin Astronomy and Astrophysics (2015), 582Context. The direct detection of exoplanets with high-contrast imaging requires advanced data processing methods to disentangle potential planetary signals from bright quasi-static speckles. Among them ... [more ▼]Context. The direct detection of exoplanets with high-contrast imaging requires advanced data processing methods to disentangle potential planetary signals from bright quasi-static speckles. Among them, angular differential imaging (ADI) permits potential planetary signals with a known rotation rate to be separated from instrumental speckles that are either statics or slowly variable. The method presented in this paper, called ANDROMEDA for ANgular Differential OptiMal Exoplanet Detection Algorithm is based on a maximum likelihood approach to ADI and is used to estimate the position and the flux of any point source present in the field of view. Aims. In order to optimize and experimentally validate this previously proposed method, we applied ANDROMEDA to real VLT/NaCo data. In addition to its pure detection capability, we investigated the possibility of defining simple and efficient criteria for automatic point source extraction able to support the processing of large surveys. Methods. To assess the performance of the method, we applied ANDROMEDA on VLT/NaCo data of TYC-8979-1683-1 which is surrounded by numerous bright stars and on which we added synthetic planets of known position and flux in the field. In order to accommodate the real data properties, it was necessary to develop additional pre-processing and post-processing steps to the initially proposed algorithm. We then investigated its skill in the challenging case of a well-known target, $\beta$ Pictoris, whose companion is close to the detection limit and we compared our results to those obtained by another method based on principal component analysis (PCA). Results. Application on VLT/NaCo data demonstrates the ability of ANDROMEDA to automatically detect and characterize point sources present in the image field. We end up with a robust method bringing consistent results with a sensitivity similar to the recently published algorithms, with only two parameters to be fine tuned. Moreover, the companion flux estimates are not biased by the algorithm parameters and do not require a posteriori corrections. Conclusions. ANDROMEDA is an attractive alternative to current standard image processing methods that can be readily applied to on-sky data. [less ▲]Detailed reference viewed: 21 (0 ULg) Guided group purchases of energy renovation services and works in deprived urban neighbourhoodsRuelle, Christine ; Teller, Jacques in Energy Efficiency (2015)The energy retrofitting of housings is progressing very slowly in Wallonia (Belgium) despite individual fiscal measures and subsidies offered by public authorities to support households engaging in this ... [more ▼]The energy retrofitting of housings is progressing very slowly in Wallonia (Belgium) despite individual fiscal measures and subsidies offered by public authorities to support households engaging in this process. This paper explores the use of a method called ‘Guided Group Purchases’ (GPPs), i.e. an approach combining support, guidance and group purchasing of energy renovation services and works, as a possible method to accelerate the retrofitting of the existing housing stock. It reports on an action research experiment conducted in the context of the Interreg project ‘SUN’ (Sustainable Urban Neighbourhoods). The results of this experiment are quite promising. Within a few months, some 80 energy retrofitting interventions (energy audits or insulation works) were implemented in one neighbourhood of the city of Liège. Our evaluation of the experiment showed that the prospect of achieving cost reductions was one of the main initial expectations of participants to the GGPs. Still the participants rather insisted on other benefits after taking part to the initiative. These benefits were mostly related to the guidance they received, to the facilitation with contractors and to the social dynamics generated by the initiative. Several weaknesses were also identified by participants, like the lack of follow-up during and after the works. Our evaluation also highlighted that the main landlords did not participate in the initiative and that the influence of GGPs on costs was limited to specific types of interventions. Despite observed limitations and possible improvements, such a neighbourhood-based approach certainly constitutes a promising avenue for public authorities to support and accelerate the energy retrofitting of private residential buildings in urban neighbourhoods. [less ▲]Detailed reference viewed: 35 (11 ULg) A lysine cluster in domain II of Bacillus subtilis PBP4a plays a role in the membrane attachment of this C1-PBPVanden Broeck, Arnaud; Van Der Heiden, Edwige ; Sauvage, Eric et alin PLoS ONE (2015)In PBP4a, a Bacillus subtilis class-C1 penicillin-binding protein (PBP), four clustered lysine (K) residues, K86, K114, K119, and K265, protrude from domain II. Replacement of these amino acids with ... [more ▼]In PBP4a, a Bacillus subtilis class-C1 penicillin-binding protein (PBP), four clustered lysine (K) residues, K86, K114, K119, and K265, protrude from domain II. Replacement of these amino acids with glutamine (Q) residues by site-directed mutagenesis yielded Mut4KQ PBP4a. When produced in Escherichia coli without its predicted Sec-signal peptide, wildtype (WT) PBP4a was found mainly associated with the host cytoplasmic membrane, whereas Mut4KQ PBP4a remained largely unbound. After purification, the capacities of the two proteins to bind to B. subtilis membranes were compared. The results were similar to those obtained in E. coli: in vitro, a much higher percentage of WT PBP4a than of Mut4KQ PBP4a was found to interact with B. subtilis membranes. Immunodetection of PBP4a in B. subtilis membrane extracts revealed that a processed form of this PBP (as indicated by its size) associates with the B. subtilis cytoplasmic membrane. In the absence of any amphiphilic peptide in PBP4a, the crown of positive charges on the surface of domain II is likely responsible for the cellular localization of this PBP and its attachment to the cytoplasmic membrane. [less ▲]Detailed reference viewed: 17 (1 ULg) Data Product Specification Proposal for Architectural Heritage Documentation with Photogrammetric Techniques: A Case Study in BrazilCampos, Mariana; Tommaselli, Antonio; Ivanova, Ivana et alin Remote Sensing (2015), 7(10), 13337-13363Photogrammetric documentation can provide a sound database for the needs of architectural heritage preservation. However, the major part of photogrammetric documentation production is not used for ... [more ▼]Photogrammetric documentation can provide a sound database for the needs of architectural heritage preservation. However, the major part of photogrammetric documentation production is not used for subsequent architectural heritage projects, due to lack of knowledge of photogrammetric documentation accuracy. In addition, there are only a few studies with rigorous analysis of the requirements for photogrammetric documentation of architectural heritage. In particular, requirements focusing on the geometry of the models generated by fully digital photogrammetric processes are missing. Considering these needs, this paper presents a procedure for architectural heritage documentation with photogrammetric techniques based on a previous review of existing standards of architectural heritage documentation. The data product specification proposed was elaborated conforming to ISO 19131 recommendations. We present the procedure with two case studies in the context of Brazilian architectural heritage documentation. Quality analysis of the produced models were performed considering ISO 19157 elements, such as positional accuracy, logical consistency and completeness, meeting the requirements. Our results confirm that the proposed requirements for photogrammetric documentation are viable. [less ▲]Detailed reference viewed: 16 (4 ULg) Parameter estimation and inference in dynamic systems described by linear partial differential equationsFrasso, Gianluca ; Jeager, Jonathan; Lambert, Philippe in AStA Advances in Statistical Analysis (2015)Differential equations (DEs) are commonly used to describe dynamic sys- tems evolving in one (ordinary differential equations or ODEs) or in more than one dimensions (partial differential equations or ... [more ▼]Differential equations (DEs) are commonly used to describe dynamic sys- tems evolving in one (ordinary differential equations or ODEs) or in more than one dimensions (partial differential equations or PDEs). In real data applications, the para- meters involved in the DE models are usually unknown and need to be estimated from the available measurements together with the state function. In this paper, we present frequentist and Bayesian approaches for the joint estimation of the parameters and of the state functions involved in linear PDEs. We also propose two strategies to include state (initial and/or boundary) conditions in the estimation procedure. We evaluate the performances of the proposed strategy through simulated examples and a real data analysis involving (known and necessary) state conditions. [less ▲]Detailed reference viewed: 13 (2 ULg) Effect of Metals, Metalloids and Metallic Nanoparticles on Microalgae Growth and Industrial Product Biosynthesis: A ReviewMiazek, Krystian ; Iwanek, Waldemar; Remacle, Claire et alin International Journal of Molecular Sciences (2015), 16Microalgae are a source of numerous compounds that can be used in many branches of industry. Synthesis of such compounds in microalgal cells can be amplified under stress conditions. Exposure to various ... [more ▼]Microalgae are a source of numerous compounds that can be used in many branches of industry. Synthesis of such compounds in microalgal cells can be amplified under stress conditions. Exposure to various metals can be one of methods applied to induce cell stress and synthesis of target products in microalgae cultures. In this review, the potential of producing diverse biocompounds (pigments, lipids, exopolymers, peptides, phytohormones, arsenoorganics, nanoparticles) from microalgae cultures upon exposure to various metals, is evaluated. Additionally, different methods to alter microalgae response towards metals and metal stress are described. Finally, possibilities to sustain high growth rates and productivity of microalgal cultures in the presence of metals are discussed. [less ▲]Detailed reference viewed: 29 (8 ULg) RÉGIME ALIMENTAIRE ET STRATÉGIE TROPHIQUE SAISONNIÈRE DE LA LOUTRE D’EUROPE, LUTRA LUTRA, DANS LE MOYEN ATLAS (MAROC)Libois, Roland ; Fareh, Mostafa; Brahimi, Amina et alin Revue d'Ecologie (La Terre et la Vie) (2015), 70(4), 314-327To learn more about the adaptability and predation behaviour of the European Otter (Lutra lutra) in semi-arid regions, its diet has been studied in Wadi Beth, a typical river of Middle Atlas (Morocco ... [more ▼]To learn more about the adaptability and predation behaviour of the European Otter (Lutra lutra) in semi-arid regions, its diet has been studied in Wadi Beth, a typical river of Middle Atlas (Morocco), from its source areas (Azrou) to El Kansera hill reservoir dam. Fecal samples (spraints) were systematically collected from six locations during two annual cycles, a collection per season campaign. The study reveals that the otter’s diet is classic (dominant fish), very typical and characteristic of aquatic ecosystems in arid Mediterranean climate, which is reflected in particular by the singular presence of prey like reptiles. Prey species richness totals more than 18 species. Moreover, the frequency of occurrence and relative abundance of taxa consumed were calculated from 2444 identified prey. Fish represent more than 75 % of the prey (relative abundance) with a very large predominance of 3 species of barbels. The anuran amphibians constitute 15 % of the prey. The rest is accounted for, according their respective importance, by insects, ophidians, a chelonian (Mauremys leprosa), birds, crustaceans and finally small mammals. Over time, the diet changed: in autumn 2010, cichlids, introduced into the river, appeared in the prey consumed. The proportion of prey types abruptly changed: perciforms, rare in spring and summer 2010 (less than 4 % of the prey) increased sevenfold in autumn 2010 (27 %) and then declined in the spring and more in summer 2011. In summer 2011, the proportion of barbels dropped, drastically offset by salmonids and, even more, by amphibians. In summer, the proportion of amphibians and ophidians becomes more important. Site variations are linked to local conditions: presence of ponds, nature of the bottom, slope, speed and flow of the water, etc. Finally, small-sized fish (salmonids and barbels) dominate the diet: 80 % are less than 10 cm. [less ▲]Detailed reference viewed: 11 (0 ULg) The onset, evolution and magnetic braking of vortex lattice instabilities in nanostructured superconducting filmsAdami, Obaïd-Allah ; Jelic, Zeljko ; Xue, Cun et alin Physical Review. B : Condensed Matter (2015), 92In 1976 Larkin and Ovchinnikov [Sov. Phys. JETP 41, 960 (1976)] predicted that vortex matter in superconductors driven by an electrical current can undergo an abrupt dynamic transition from a flux-flow ... [more ▼]In 1976 Larkin and Ovchinnikov [Sov. Phys. JETP 41, 960 (1976)] predicted that vortex matter in superconductors driven by an electrical current can undergo an abrupt dynamic transition from a flux-flow regime to a more dissipative state at suficiently high vortex velocities. Typically this transition manifests itself as a large voltage jump at a particular current density, so-called instability current density J, which is smaller than the depairing current. By tuning the effective pinning strength in Al fi lms, using an artifi cial periodic pinning array of triangular holes, we show that a unique and well defi ned instability current density exists if the pinning is strong, whereas a series of multiple voltage transitions appear in the relatively weaker pinning regime. This behavior is consistent with time-dependent Ginzburg-Landau simulations, where the multiple-step transition can be unambiguously attributed to the progressive development of vortex chains and subsequently phase-slip lines. In addition, we explore experimentally the magnetic braking e ffects, caused by a thick Cu layer deposited on top of the superconductor, on the instabilities and the vortex ratchet effect. [less ▲]Detailed reference viewed: 59 (22 ULg) Stroboscopic phenomena in superconductors with dynamic pinning landscapeJelic, Zeljko ; Milosevic, Milorad; Van de Vondel, Joris et alin Scientific Reports (2015), 5Introducing artificial pinning centers is a well established strategy to trap quantum vortices and increase the maximal magnetic field and applied electric current that a superconductor can sustain ... [more ▼]Introducing artificial pinning centers is a well established strategy to trap quantum vortices and increase the maximal magnetic field and applied electric current that a superconductor can sustain without dissipation. In case of spatially periodic pinning, a clear enhancement of the superconducting critical current arises when commensurability between the vortex configurations and the pinning landscape occurs. With recent achievements in (ultrafast) optics and nanoengineered plasmonics it has become possible to exploit the interaction of light with superconductivity, and create not only spatially periodic imprints on the superconducting condensate, but also temporally periodic ones. Here we show that in the latter case, temporal matching phenomena develop, caused by stroboscopic commensurability between the characteristic frequency of the vortex motion under applied current and the frequency of the dynamic pinning. The matching resonances persist in a broad parameter space, including magnetic field, driving current, or material purity, giving rise to unusual features such as externally variable resistance/impedance and Shapiro steps in current-voltage characteristics. All features are tunable by the frequency of the dynamic pinning landscape. These findings open further exploration avenues for using flashing, spatially engineered, and/or mobile excitations on superconductors, permitting us to achieve advanced functionalities. [less ▲]Detailed reference viewed: 84 (16 ULg) Evidence for two spatially separated UV continuum emitting regions in the Cloverleaf broad absorption line quasarSluse, Dominique ; Hutsemekers, Damien ; Anguita, T. et alin Astronomy and Astrophysics (2015), 582Testing the standard Shakura-Sunyaev model of accretion is a challenging task because the central region of quasars where accretion takes place is unresolved with telescopes. The analysis of microlensing ... [more ▼]Testing the standard Shakura-Sunyaev model of accretion is a challenging task because the central region of quasars where accretion takes place is unresolved with telescopes. The analysis of microlensing in gravitationally lensed quasars is one of the few techniques that can test this model, yielding to the measurement of the size and of temperature profile of the accretion disc. We present spectroscopic observations of the gravitationally lensed broad absorption line quasar H1413+117, which reveal partial microlensing of the continuum emission that appears to originate from two separated regions: a microlensed region, corresponding the compact accretion disc; and a non-microlensed region, more extended and contributing to at least 30% of the total UV-continuum flux. Because this extended continuum is occulted by the broad absorption line clouds, it is not associated with the host galaxy, but rather with light scattered in the neighbourhood of the central engine. We measure the amplitude of microlensing of the compact continuum over the rest-frame wavelength range 1000-7000 Å. Following a Bayesian scheme, we confront our measurements to microlensing simulations of an accretion disc with a temperature varying as T ∝ R[SUP]-1/ν[/SUP]. We find a most likely source half-light radius of R[SUB]1/2[/SUB] = 0.61 × 10[SUP]16[/SUP]cm (i.e., 0.002 pc) at 0.18 μm, and a most-likely index of ν = 0.4. The standard disc (ν = 4/3) model is not ruled out by our data, and is found within the 95% confidence interval associated with our measurements. We demonstrate that, for H1413+117, the existence of an extended continuum in addition to the disc emission only has a small impact on the inferred disc parameters, and is unlikely to solve the tension between the microlensing source size and standard disc sizes, as previously reported in the literature. Based on observations made with ESO Telescopes at the Paranal Observatory (Chile). ESO program ID: 386.B-0337.Appendices A and B are available in electronic form at http://www.aanda.org [less ▲]Detailed reference viewed: 12 (1 ULg) Prediction of Allogeneic Hematopoietic Stem-Cell Transplantation Mortality 100 Days After Transplantation Using a Machine Learning Algorithm: A European Group for Blood and Marrow Transplantation Acute Leukemia Working Party Retrospective Data Mining StudySHOUVAL, Roni; LABOPIN, Myriam; BONDI, Ori et alin Journal of Clinical Oncology (2015), 33(28), 3144-3152Purpose: Allogeneic hematopoietic stem-cell transplantation (HSCT) is potentiallu curative for acute leukemia (AL), but carries considerable risk. Machine learning algorithms, which are part of the data ... [more ▼]Purpose: Allogeneic hematopoietic stem-cell transplantation (HSCT) is potentiallu curative for acute leukemia (AL), but carries considerable risk. Machine learning algorithms, which are part of the data mining (DM) approach, may serve for transplantation-related mortality risk prediction. Patients and Methods: This work is a retrospective DM study on a cohort of 28,236 adult HSCT recipients from the AL registry of the European Group for Blood and Marrow Transplantation. The primary objective was prediction of overall mortality (OM) at 100 days after HSCT. Secondary objectives were estimation of nonrelapse mortality, leukemia-free survival, and overall survival at 2 years. Donor, recipient, and procedural characteristics were alalyzed. The alternating decision tree machine learning algorithm was applied for model development on 70 % of the data set and validated on the remaining data. [less ▲]Detailed reference viewed: 10 (0 ULg) Zigzag antiferromagnetic quantum ground state in monoclinic honeycomb lattice antimonates A3Ni2SbO6 (A=Li, Na)Zvereva, E.A.; Stratan, M.I.; Ovchenkov, Y.A. et alin Physical Review. B: Condensed Matter and Materials Physics (2015), 92We present a comprehensive experimental and theoretical study of the electronic and magnetic properties of two quasi-two-dimensional (2D) honeycomb-lattice monoclinic compounds A3Ni2SbO6 (A=Li, Na ... [more ▼]We present a comprehensive experimental and theoretical study of the electronic and magnetic properties of two quasi-two-dimensional (2D) honeycomb-lattice monoclinic compounds A3Ni2SbO6 (A=Li, Na). Magnetic susceptibility and specific heat data are consistent with the onset of antiferromagnetic (AFM) long range order at low temperatures with Néel temperatures ~ 14 and 16 K for Li3Ni2SbO6 and Na3Ni2SbO6, respectively. The effective magnetic moments of 4.3 Bohr magnetons/f.u. (Li3Ni2SbO6) and 4.4 Bohr magnetons/f.u. (Na3Ni2SbO6) indicate that Ni2+ is in a high-spin configuration (S=1). The temperature dependence of the inverse magnetic susceptibility follows the Curie-Weiss law in the high-temperature region and shows positive values of the Weiss temperature ~ 8 K (Li3Ni2SbO6) and ~12 K (Na3Ni2SbO6) pointing to the presence of non-negligible ferromagnetic interactions, although the system orders AFM at low temperatures. In addition, the magnetization curves reveal a field-induced (spin-flop type) transition below TN that can be related to the magnetocrystalline anisotropy in these systems. These observations are in agreement with density functional theory calculations, which show that both antiferromagnetic and ferromagnetic intralayer spin exchange couplings between Ni2+ ions are present in the honeycomb planes supporting a zigzag antiferromagnetic ground state. Based on our experimental measurements and theoretical calculations we propose magnetic phase diagrams for the two compounds. [less ▲]Detailed reference viewed: 67 (10 ULg) Spectral Variations of Of?p Oblique Magnetic Rotator Candidates in the Magellanic CloudsWalborn, Nolan R.; Morrell, Nidia I.; Nazé, Yaël et alin Astronomical Journal (The) (2015), 150Optical spectroscopic monitoring has been conducted of two O stars in the SMC and one in the LMC, the spectral characteristics of which place them in the Of?p category, which has been established in the ... [more ▼]Optical spectroscopic monitoring has been conducted of two O stars in the SMC and one in the LMC, the spectral characteristics of which place them in the Of?p category, which has been established in the Galaxy to consist of oblique magnetic rotators. All of these Magellanic stars show systematic spectral variations typical of the Of?p class, further strengthening their magnetic candidacy to the point of virtual certainty. The spectral variations are related to photometric variations derived from Optical Gravitational Lensing Experiment data by Nazé et al. in a parallel study, which yields rotational periods for two of them. Now circular spectropolarimetry is required to measure their fields, and ultraviolet spectroscopy to further characterize their low-metallicity, magnetically confined winds, in support of hydrodynamical analyses. [less ▲]Detailed reference viewed: 18 (3 ULg) The far-ultraviolet main auroral emission at Jupiter – Part 2: Vertical emission profileBonfond, Bertrand ; Gustin, Jacques ; Gérard, Jean-Claude et alin Annales Geophysicae (2015), 33The aurorae at Jupiter are made up of many different features associated with a variety of generation mechanisms. The main auroral emission, also known as the main oval, is the most prominent of them as ... [more ▼]The aurorae at Jupiter are made up of many different features associated with a variety of generation mechanisms. The main auroral emission, also known as the main oval, is the most prominent of them as it accounts for approximately half of the total power emitted by the aurorae in the ultraviolet range. The energy of the precipitating electrons is a crucial parameter to characterize the processes at play which give rise to these auroral emissions, and the altitude of the emissions directly depends on this energy. Here we make use of far-UV (FUV) images acquired with the Advanced Camera for Surveys on board the Hubble Space Telescope and spectra acquired with the Space Telescope Imaging Spectrograph to measure the vertical profile of the main emissions. The altitude of the brightness peak as seen above the limb is ~ 400 km, which is significantly higher than the 250 km measured in the post-dusk sector by Galileo in the visible domain. However, a detailed analysis of the effect of hydrocarbon absorption, including both simulations and FUV spectral observations, indicates that FUV apparent vertical profiles should be considered with caution, as these observations are not incompatible with an emission peak located at 250 km. The analysis also calls for spectral observations to be carried out with an optimized geometry in order to remove observational ambiguities. [less ▲]Detailed reference viewed: 26 (8 ULg) Tests of the Planetary Hypothesis for PTFO 8-8695bYu, Liang; Winn, Joshua N.; Gillon, Michaël et alin Astrophysical Journal (2015), 812The T Tauri star PTFO 8-8695 exhibits periodic fading events that have been interpreted as the transits of a giant planet on a precessing orbit. Here we present three tests of the planet hypothesis. First ... [more ▼]The T Tauri star PTFO 8-8695 exhibits periodic fading events that have been interpreted as the transits of a giant planet on a precessing orbit. Here we present three tests of the planet hypothesis. First, we sought evidence for the secular changes in light-curve morphology that are predicted to be a consequence of orbital precession. We observed 28 fading events spread over several years and did not see the expected changes. Instead, we found that the fading events are not strictly periodic. Second, we attempted to detect the planet's radiation, based on infrared observations spanning the predicted times of occultations. We ruled out a signal of the expected amplitude. Third, we attempted to detect the Rossiter-McLaughlin effect by performing high-resolution spectroscopy throughout a fading event. No effect was seen at the expected level, ruling out most (but not all) possible orientations for the hypothetical planetary orbit. Our spectroscopy also revealed strong, time-variable, high-velocity Hα and Ca H & K emission features. All these observations cast doubt on the planetary hypothesis, and suggest instead that the fading events represent starspots, eclipses by circumstellar dust, or occultations of an accretion hotspot. [less ▲]Detailed reference viewed: 9 (0 ULg) The K2-ESPRINT Project I: Discovery of the Disintegrating Rocky Planet K2-22b with a Cometary Head and Leading TailSanchis-Ojeda, R.; Rappaport, S.; Pallé, E. et alin Astrophysical Journal (2015), 812(2), 112We present the discovery of a transiting exoplanet candidate in the K2 Field-1 with an orbital period of 9.1457 hr: K2-22b. The highly variable transit depths, ranging from ∼0% to 1.3%, are suggestive of ... [more ▼]We present the discovery of a transiting exoplanet candidate in the K2 Field-1 with an orbital period of 9.1457 hr: K2-22b. The highly variable transit depths, ranging from ∼0% to 1.3%, are suggestive of a planet that is disintegrating via the emission of dusty effluents. We characterize the host star as an M-dwarf with Teff ≃ 3800 K. We have obtained ground-based transit measurements with several 1-m class telescopes and with the GTC. These observations (1) improve the transit ephemeris; (2) confirm the variable nature of the transit depths; (3) indicate variations in the transit shapes; and (4) demonstrate clearly that at least on one occasion the transit depths were significantly wavelength dependent. The latter three effects tend to indicate extinction of starlight by dust rather than by any combination of solid bodies. The K2 observations yield a folded light curve with lower time resolution but with substantially better statistical precision compared with the ground-based observations. We detect a significant “bump” just after the transit egress, and a less significant bump just prior to transit ingress. We interpret these bumps in the context of a planet that is not only likely streaming a dust tail behind it, but also has a more prominent leading dust trail that precedes it. This effect is modeled in terms of dust grains that can escape to beyond the planet's Hill sphere and effectively undergo “Roche lobe overflow,” even though the planet's surface is likely underfilling its Roche lobe by a factor of 2. [less ▲]Detailed reference viewed: 29 (8 ULg) The far-ultraviolet main auroral emission at Jupiter – Part 1: Dawn–dusk brightness asymmetriesBonfond, Bertrand ; Gustin, Jacques ; Gérard, Jean-Claude et alin Annales Geophysicae (2015), 33The main auroral emission at Jupiter generally appears as a quasi-closed curtain centered around the magnetic pole. This auroral feature, which accounts for approximately half of the total power emitted ... [more ▼]The main auroral emission at Jupiter generally appears as a quasi-closed curtain centered around the magnetic pole. This auroral feature, which accounts for approximately half of the total power emitted by the aurorae in the ultraviolet range, is related to corotation enforcement currents in the middle magnetosphere. Early models for these currents assumed axisymmetry, but significant local time variability is obvious on any image of the Jovian aurorae. Here we use far-UV images from the Hubble Space Telescope to further characterize these variations on a statistical basis. We show that the dusk side sector is ~ 3 times brighter than the dawn side in the southern hemisphere and ~ 1.1 brighter in the northern hemisphere, where the magnetic anomaly complicates the interpretation of the measurements. We suggest that such an asymmetry between the dawn and the dusk sectors could be the result of a partial ring current in the nightside magnetosphere. [less ▲]Detailed reference viewed: 32 (12 ULg) Kepler's first view of O-star variability: K2 data of five O stars in Campaign 0 as a proof of concept for O-star asteroseismologyBuysschaert, B.; Aerts, C.; Bloemen, S. et alin Monthly Notices of the Royal Astronomical Society (2015), 453We present high-precision photometric light curves of five O-type stars observed with the refurbished Kepler satellite during its Campaign 0. For one of the stars, we also assembled high-resolution ground ... [more ▼]We present high-precision photometric light curves of five O-type stars observed with the refurbished Kepler satellite during its Campaign 0. For one of the stars, we also assembled high-resolution ground-based spectroscopy with the HERMES spectrograph attached to the 1.2 m Mercator telescope. The stars EPIC 202060097 (O9.5V) and EPIC 202060098 (O7V) exhibit monoperiodic variability due to rotational modulation with an amplitude of 5.6 and 9.3 mmag and a rotation period of 2.63 and 5.03 d, respectively. EPIC 202060091 (O9V) and EPIC 202060093 (O9V:pe) reveal variability at low frequency but the cause is unclear. EPIC 202060092 (O9V:p) is discovered to be a spectroscopic binary with at least one multiperiodic β Cep-type pulsator whose detected mode frequencies occur in the range [0.11, 6.99] d[SUP]-1[/SUP] and have amplitudes between 0.8 and 2.0 mmag. Its pulsation spectrum is shown to be fully compatible with the ones predicted by core-hydrogen burning O-star models. Despite the short duration of some 33 d and the limited data quality with a precision near 100 μmag of these first K2 data, the diversity of possible causes for O-star variability already revealed from campaigns of similar duration by the MOST and CoRoT satellites is confirmed with Kepler. We provide an overview of O-star space photometry and give arguments why future K2 monitoring during Campaigns 11 and 13 at short cadence, accompanied by time-resolved high-precision high-resolution spectroscopy, opens up the possibility of in-depth O-star seismology. [less ▲]Detailed reference viewed: 17 (6 ULg) KIC 4768731: a bright long-period roAp star in the Kepler fieldSmalley, B.; Niemczura, E.; Murphy, S. J. et alin Monthly Notices of the Royal Astronomical Society (2015), 452We report the identification of 61.45 d[SUP]-1[/SUP] (711.2 μHz) oscillations, with amplitudes of 62.6 μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V = 9.17 ... [more ▼]We report the identification of 61.45 d[SUP]-1[/SUP] (711.2 μHz) oscillations, with amplitudes of 62.6 μmag, in KIC 4768731 (HD 225914) using Kepler photometry. This relatively bright (V = 9.17) chemically peculiar star with spectral type A5 Vp SrCr(Eu) has previously been found to exhibit rotational modulation with a period of 5.21 d. Fourier analysis reveals a simple dipole pulsator with an amplitude that has remained stable over a 4-yr time span, but with a frequency that is variable. Analysis of high-resolution spectra yields stellar parameters of T[SUB]eff[/SUB] = 8100 ± 200 K, log g = 4.0 ± 0.2, [Fe/H] = +0.31 ± 0.24 and v sin i = 14.8 ± 1.6 km s[SUP]-1[/SUP]. Line profile variations caused by rotation are also evident. Lines of Sr, Cr, Eu, Mg and Si are strongest when the star is brightest, while Y and Ba vary in antiphase with the other elements. The abundances of rare earth elements are only modestly enhanced compared to other roAp stars of similar T[SUB]eff[/SUB] and log g. Radial velocities in the literature suggest a significant change over the past 30 yr, but the radial velocities presented here show no significant change over a period of 4 yr. [less ▲]Detailed reference viewed: 8 (0 ULg) Halomethyl-cobalt(bis-acetylacetonate) for the controlled synthesis of functional polymersDemarteau, Jérémy ; Kermagoret, Anthony; German, Ian et alin Chemical Communications (2015), 51(76), 14334-14337Novel organocobalt complexes featuring weak C–CoL2 bonds (L = acetylacetonate) are prepared and used as sources of halomethyl radicals. They permit the precision synthesis of a-halide functionalized and ... [more ▼]Novel organocobalt complexes featuring weak C–CoL2 bonds (L = acetylacetonate) are prepared and used as sources of halomethyl radicals. They permit the precision synthesis of a-halide functionalized and telechelic polymers in organic media or in water. Substitution of halide by azide allows derivatization of polymers using the CuAAC click reaction. [less ▲]Detailed reference viewed: 33 (13 ULg)