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See detailVisuo-spatial STM impairment link to a serial order component deficit in children with Velocardiofacial syndrome
Attout, Lucie ULg; Vossius, Line ULg; Noël, Marie-Pascale et al

Poster (2016, September 01)

Some previous studies showed that verbal short-term memory (STM) is better preserved than visuospatial STM in the velocardiofacial syndrome (VCFS), a neurodevelopmental disorder resulting from a 22q11.2 ... [more ▼]

Some previous studies showed that verbal short-term memory (STM) is better preserved than visuospatial STM in the velocardiofacial syndrome (VCFS), a neurodevelopmental disorder resulting from a 22q11.2 deletion. This deficit is generally assigned to a more global visuospatial skills deficit. However, for verbal STM, previous study suggested a specific deficit in the serial order component, processing considered as independent of modalities. In this study we proposed to explore the serial order component in visuospatial STM by contrasting simultaneous vs. sequential presentation of stimuli to maintain in children with VCFS, in order to see in what extent the deficit is global and resulting from visuospatial deficit or whether this deficit is specific to the serial order component. We tested a group of 27 children and adolescents with VCFS to a control group, matched on verbal IQ performance estimated. The VCFS group showed impaired performance on the sequential configuration but similar performance on the simultaneous condition. These results support the idea of an amodal serial order component in STM. The implication of serial order STM deficits on numerical cognition will be discussed. [less ▲]

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See detailHow to expand method by and for sensory: trials along and beside fieldwork
Vangeebergen, Thomas ULg

Conference (2016, September 01)

In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical ... [more ▼]

In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical work, as graphic novel or comics. [less ▲]

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See detailModels of rotating stars constrained by asteroseismic measurements of red giants
Eggenberger, P.; Lagarde, N.; Miglio, A. et al

in Astronomische Nachrichten (2016, September 01), 337(8-9), 832-836

Solar-like oscillations have now been characterized for a large number of stars, thanks to asteroseismic data obtained recently by space missions. This has led to the determination of the global and ... [more ▼]

Solar-like oscillations have now been characterized for a large number of stars, thanks to asteroseismic data obtained recently by space missions. This has led to the determination of the global and internal properties of these stars. In particular, core rotation rates have been obtained for red-giant stars, which is of prime importance to progress in the modelling of the dynamical processes at work in stellar interiors. In this presentation, we discuss which constraints can be brought by these asteroseismic measurements on stellar models that include rotational effects. Similarly to the solar case, we show that an efficient mechanism is required for the transport of angular momentum in the radiative zones of red giants. The efficiency of this transport process can be determined by asteroseismic observations of red-giant stars. [less ▲]

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See detailSuccessional trajectories of cyanobacterial communities following glacier retreat in Svalbard (High Arctic)
Stelmach Pessi, Igor ULg; Pushkareva, Ekaterina; Borderie, Fabien ULg et al

Conference (2016, September 01)

The effects of global warming are pronounced at high northern latitudes, where the warming trend observed for the past decades is almost twice as the global average. Most glaciers in Svalbard (High Arctic ... [more ▼]

The effects of global warming are pronounced at high northern latitudes, where the warming trend observed for the past decades is almost twice as the global average. Most glaciers in Svalbard (High Arctic) have been retreating and thinning since the end of the Little Ice Age in the late 19th century, and retreat rates have increased substantially in the last decades. As a glacier retreats, it systematically exposes new terrestrial habitats for the colonization by pioneering (micro)organisms. Distance from the glacier terminus can be used as a proxy for time since deglaciation, which makes glacier forefields well suited for the study of primary succession. In the present study, we investigated the successional trajectories of cyanobacterial communities along a 100-year deglaciation gradient in the forefield of two Svalbard glaciers (Ebba- and Hørbyebreen). Cyanobacterial abundance was assessed by epifluorescence microscopy and cyanobacterial diversity was investigated by pyrosequencing of partial 16S rRNA gene sequences. Filamentous cyanobacteria were more abundant than unicellular and heterocystous cyanobacteria in both forefields, and an increase in the abundance of cyanobacteria was observed along the deglaciation gradients. Pseudanabaenales was the most OTU-rich order, followed by Chroococcales, Oscillatoriales, Synechococcales, Nostocales and Gloeobacterales. At the genus level, classified phylotypes were assigned to Leptolyngbya, Phormidium, Nostoc, Pseudanabaena, Chroococcidiopsis and Microcoleus. Interestingly, OTU richness increased along the deglaciation gradient in Ebbabreen, but an inverse correlation was observed in Hørbyebreen. Beta diversity estimations indicated contrasting cyanobacterial phylogenetic structures along the temporal gradient, with a clear separation of initial (10-20 years), intermediate (30-50) and advanced (80-100) communities. Time since deglaciation accounted for around 25% of the phylogenetic variability in both forefields, with organic carbon content also explaining a significant proportion of community turnover along the deglaciation gradients. Taxonomic composition was somewhat constant along the deglaciation gradient, but OTUs associated with initial communities were related to sequences predominantely restricted to polar biotopes, while advanced communities included phylotypes related to cosmopolitan taxa. [less ▲]

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See detailComputed tomography-guided injection of muscle-derived mesenchimal stem cells in the intervertebral disc of dogs affected by natural disc degeneration: clinical safety and intervertebral disc imaging assessment
Liotta, Annalisa Pia ULg; Sandersen, Charlotte ULg; Ceusters, Justine ULg et al

Poster (2016, September 01)

Introduction/Purpose: Pre-clinical randomized controlled animal trials have been conducted to evaluate the effects of mesenchymal stem cell (MSCs) transplantation on intervertebral disc (IVD) degeneration ... [more ▼]

Introduction/Purpose: Pre-clinical randomized controlled animal trials have been conducted to evaluate the effects of mesenchymal stem cell (MSCs) transplantation on intervertebral disc (IVD) degeneration. According to their histological results and to imaging assessment of the IVD, intradiscal injection of MSCs is effective, arresting or slowing IVDD process, and is associated with a low complication rate. Few of these studies have been conducted on canine artificially degenerated IVD, using bone marrow or adipose-derived MSCs. Therefore a systematic study on naturally degenerated IVD using MSCs obtained from autologous muscular tissue in dogs is still lacking. The aims of this study were to evaluate the clinical effects of intradiscal injection of muscle-derived MSCs and its effects on imaging features of the intervertebral disc. Methods: Eight experimental dogs were randomly included with the approval of the University’s Animal Care and Use Committee. The final inclusion criteria were the presence of naturally degenerated lumbosacral IVD detected on low-field magnetic resonance (MRI) images and the obtaining of 3 x 106 autologous muscle-derived MSCs. A computed tomography (CT) and MRI examination was performed before and 2 months after the procedure and 13 imaging parameters were assessed. Mesenchymal stem cells diluted in 0,2 ml of FRS Hypothermosol were injected in the lumbosacral IVD under CT-guidance. Clinical examinations were performed regularly during 1 month after the procedure. Results: Six dogs met the inclusion criteria. The remaining 2 dogs did not undergo intradiscal injections, but were used as control group. No major or minor complications were reported during the procedure. No abnormalities were noticed during the clinical examinations. No statistically significant variations of IVD imaging features were noticed before and after the injections. Discussion/Conclusions: Intradiscal injection of muscle-derived MSCs is clinically safe and it is not associated with any progression of the IVD degeneration, detected by CT or low-field MRI imaging. Further studies are needed to assess its efficacy as treatment for the canine natural IVD degeneration. [less ▲]

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See detailStrategies of the Walloon dairy breeders faced to the uncertain dairy future
Dalcq, Anne-Catherine ULg; Dogot, Thomas ULg; Soyeurt, Hélène ULg et al

Conference (2016, September 01)

This study observes the strategies, and their determinants, of the Walloon dairy breeders faced to the post quota perspective through the realization of 245 surveys, conducted from November 2014 to ... [more ▼]

This study observes the strategies, and their determinants, of the Walloon dairy breeders faced to the post quota perspective through the realization of 245 surveys, conducted from November 2014 to February 2015. Three kinds of strategical variables were defined and related to the evolution of milk production (MP) [the breeders who increase MP (HighMP) vs. keep constant MP (ConstantMP) vs. stop MP]; the valorisation of MP [alternative (ValMP) vs. classical] and the diversification of activities [with (DivMP) vs. without such activities]. The relationships between the chosen strategies and the quantitative technical variables were studied using generalized linear models. The independence between qualitative technical variables and the strategical variables was tested using Chi Square test. HighMP and ConstantMP bredeers represent 38.4% and 53.9% of respondents, respectively. HighMP breeders were significantly more declared as legal entity (p-value = 0.03), had more family members on the farm (p-value<0.01), larger agricultural area in property (p-value = 0.03) and higher MP quota (p-value = 0.01) compared to ConstantMP breeders. Only 9.8% of respondents decide to valorise differently MP. ValMP breeders tend to have more employees (p-value = 0.08) and an agricultural area less fragmented (p-value = 0.07) than classical breeders. A total of 7.8% of respondents decide to develop other activities. DivMP breeders tend to have more employees (p-value = 0.10), more agricultural area in property (p-value = 0.03) and a more recent year of installation (p-value < 0.01). Finally, 44.9% of ConstantMP breeders do not want to start an alternative valorisation of MP and diversify their activities. In conclusion, a relationship exists between, amongst others, the legal status, workforce available, characteristics of the agricultural area, the dairy production and the strategy chosen by the Walloon dairy breeders. [less ▲]

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See detailTEACHING VETERINARY RADIOLOGY: DOES COMPARISON HELP?
Etienne, Anne-Laure ULg; Delguste, Catherine ULg; Busoni, Valeria ULg

Poster (2016, September 01)

Introduction/Purpose Comparison learning is an approach for learning complex visual tasks. As described in human medicine, by comparing radiographs with pathology and without pathology, veterinary ... [more ▼]

Introduction/Purpose Comparison learning is an approach for learning complex visual tasks. As described in human medicine, by comparing radiographs with pathology and without pathology, veterinary students could learn to discriminate relevant disease-related information to recognize the disease. We hypothesized that exposure to a training by side-by-side comparison of normal to abnormal radiographs would lead to higher visual diagnostic accuracy and possibly to a higher ability to describe the features of a known disease on canine thoracic radiographs. Material and methods Twenty veterinary students were randomly assigned to either a group that compared radiographs showing thoracic disease with normal images (group 1) or to a group that only studied abnormal radiographs (group 2). All students had their theoretical radiology teaching and 13 of them had also received the practical teaching of the study curriculum, evenly distributed between the 2 groups. Twenty-nine radiographs of small animal thorax were used. The procedure consisted in three experimenter-supervised phases: 1. training, 2. visual recognition test, 3. feature description test. In the training phase, each screen showed two radiographs with the name of the disease present in each. In the group 1 (pathology/normal condition), a radiograph of a patient and a normal image were shown next to each other. In the group 2 (pathology/pathology condition), two radiographs of patients with the same disease were shown next to each other. The 9 screens were presented twice, with the diseases in a different order for the first and second runs. A Mann-Whitney test was used to compare the success rates of groups of students. Results On visual recognition test, there was no statistical difference in visual diagnostic accuracy between groups. When students gave the wrong answer, they often diagnosed the item as another disease of similar distribution (diffuse or focal). Students who received the practical teaching and students of group 1 had a higher accuracy for normal thoracic radiographs. On feature description test, no significant effect of comparison learning was found, but focal diseases were better described than diffuse diseases with a significant difference between these. Discussion/Conclusions Results show that comparison with normal images did not help in recognizing or describing thoracic pathologies but helps to recognize normal images. [less ▲]

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See detailIntegrating Science and Technology into Sports: A Case Study of Sports Innovations in Belgium
Van Oudheusden, Michiel ULg; Van Hoyweghen, Ine

Conference (2016, September 01)

This paper explores the dynamic interplay between sports and innovation policies, research and development processes, and science-driven sports practices in Wallonia and Flanders (Belgium). Here, as in ... [more ▼]

This paper explores the dynamic interplay between sports and innovation policies, research and development processes, and science-driven sports practices in Wallonia and Flanders (Belgium). Here, as in other countries and regions, the aim of integrating science and technology into sports is now a leading sports policy principle and innovation strategy. Building on science and technology studies (STS) tools and methods (vision assessment, multi-site ethnography, foresight), the paper draws out the ethical, legal, and social issues (ELSI) induced by the use of new sciences and technologies in sports. These ELSI include the client-centered nature of sports science, which raises concerns about occupational control and athlete welfare, the uptake of genetic data in sports talent detection programs, and the challenges of coordinating "data-driven" and "intuitive" sports training approaches. It is argued that as sports are scientized and technologized, such ELSI demand to be addressed by sports innovators, governing bodies, and publics. By drawing critical attention to how sports are increasingly shaped by devices, data flows, and scientists, the paper states the case for bringing sports into STS and STS into sports. [less ▲]

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See detailComputed tomographic findings of a far lateral lumbar disc extrusion in a dog
Rizza, Maïlis ULg; Bouvy, Bernard ULg; Shimizu, Naomi ULg et al

Poster (2016, September 01)

Introduction In human medicine, far lateral lumbar disc extrusion (FLLDE) represents 7 to 12% of all disc herniations and MRI is the method of choice for diagnosis. MRI findings of a FLLDE has been ... [more ▼]

Introduction In human medicine, far lateral lumbar disc extrusion (FLLDE) represents 7 to 12% of all disc herniations and MRI is the method of choice for diagnosis. MRI findings of a FLLDE has been reported in one dog and the aim of this case report is to describe computed tomographic (CT) findings of a FLLDE in a dog. Methods A six-year-old neutered female Beagle with a good general health status was presented with a month history of left hind limb pain with shivering of this limb. Clinical examination revealed a left hind proprioceptive deficit but no pain was elicited at palpation. Results A CT scan pre- and post- contrast studies of the lumbosacral spine and a myelographic-CT were performed. A 1.3x0.6x0.3 cm homogeneous hyperattenuating (+/- 350 HU) ovoid structure was observed at the left lateral aspect of L6-L7 intervertebral disc space. The L6-L7 intervertebral disc nucleus pulposus was calcified but the annulus fibrosus had a normal non-calcified attenuation and seemed intact apart from a very thin hyperattenuating line next to the ovoid structure. This change was well circumscribed by an even hyperattenuating rim (1000HU) mimicking a thin dense cortex and was in close proximity with the annulus fibrosus and the left transverse process of L7. Perineural fat was not observed and contrast enhancement was visualized at the level of the left sixth lumbar nerve root with impingement and thickening of this root. No compression of the spinal cord was observed at this level on the myeloCT. These findings were suggestive of a dystrophic mineralization or an osteochondromatosis. FLLDE was considered less likely because of the almost normal appearance of the annulus fibrosus. At surgery some mixed gelified calcified material consistent with disc material was removed at the level of the left L6-L7 nerve root tract and disc fenestration was performed. The histological analysis confirmed the presence of degenerated herniated vertebral disk. Discussion/Conclusions In human medicine, MRI and CT scan are the main diagnostic modalities employed for diagnosis of FLLDE. In veterinary medicine, CT is often used to assess spinal diseases because of its availability. To the authors’ knowledge, CT findings of a FLLDE have not been described previously in dogs. Moreover, the thin dense cortex appearance surrounding the disc material was surprising. In conclusion, FLLDE should be included in the differential diagnosis of a calcified ovoid structure lateral to the spine even if the annulus fibrosus appears normal and if this structure is in close relation with the vertebral transverse process. [less ▲]

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See detailComparaison de deux méthodes statistiques explorant la relation entre régimes alimentaires et risques cardiovasculaires.
Sauvageot, Nicolas ULg; Leite, Sonia; Donneau, Anne-Françoise ULg et al

Poster (2016, September)

Introduction L’analyse en composantes principales (ACP) et la régression à rangs réduits (RRR) sont deux méthodes de réduction de dimension permettant de construire des variables reflétant des régimes ... [more ▼]

Introduction L’analyse en composantes principales (ACP) et la régression à rangs réduits (RRR) sont deux méthodes de réduction de dimension permettant de construire des variables reflétant des régimes alimentaires. Les régimes alimentaires obtenus par ACP sont associés aux habitudes alimentaires de la population étudiée tandis que ceux obtenus par RRR sont associés à des indicateurs d’intérêt. L’objectif de cette étude est de comparer les deux approches quant aux régimes alimentaires obtenus et à leurs associations avec les facteurs de risques cardiovasculaires (FRCV). Méthodologie Les données proviennent de l’étude interrégionale et transversale nutrition, environnement et santé cardiovasculaire (NESCAV) ayant pour but de décrire la santé cardiovasculaire de la grande région (Luxembourg, Lorraine et Wallonie). Les apports alimentaires ont été mesurés à l’aide d’un questionnaire de fréquence alimentaire et 2298 individus ont été retenus pour cette analyse. Les indicateurs d’intérêt retenus pour l’approche RRR sont les FRCV usuels (obésité, hypertension, diabète, dyslipidémie). Résultats Nous avons trouvé que les régimes alimentaires consommés par la population et ceux associés au FRCV étaient similaires. Les régimes riches en fruits, fruits secs et oléagineux, légumes, huile d’olive, graisse riche en oméga 6, thé, et ceux pauvres en aliments frits, viandes, charcuteries, soda, plats préparés, bières étaient associés à une diminution des FRCV. Les autres régimes caractérisés par des apports élevés en aliments frits, viandes, abats, bières, vins, apéritifs et liqueurs et de faibles apports en céréales, sucres et soda étaient associés à une augmentation des FRCV. Conclusions L’utilisation des deux méthodes est utile pour obtenir des informations permettant d’élaborer de nouvelles recommandations alimentaires. Les régimes alimentaires identifiés dans cette étude sont à la fois associés aux habitudes alimentaires de la population et aux FRCV. [less ▲]

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See detailFlocculation properties of the bacterial exopolysaccharide FucoPol
Araújo, Diana; Reis, Patricia; Marques, Anna et al

Conference (2016, September)

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See detailMeeting in Brackets - Devising Belgian Mental Health Policies through Inter-organisational Meetings
Thunus, Sophie ULg

Conference (2016, September)

Object: this paper analyses inter-organisational meetings held in response to a reform of the Belgian mental health care system. It proposes to shift the researcher’s attention from the instrumental ... [more ▼]

Object: this paper analyses inter-organisational meetings held in response to a reform of the Belgian mental health care system. It proposes to shift the researcher’s attention from the instrumental function attributed to meetings to the role they actually play in this reform. Aims: based on the observation that meetings frequently failed to reach their instrumental outcome, this paper first asks which other roles meetings might play and how. Second, it suggests that the concept of bracketing might be helpful in perceiving, describing and analysing the roles played by meetings. Methods: this paper relies on empirical material collected through semi-structured interviews, direct observation and documentary analyse. Excerpts from interviews and field notes of observation are used as a basis for analysing 4 specific meetings. These meetings have been selected according to their relevance to the research question of the role played by meetings and a set of criteria relating to the meeting type, participants, topic and context. Results: this paper demonstrates that, next to their instrumental function, meetings play at least three complementary roles, which are defined as expressive, representative and performative. It argues that these three roles of meetings are better understood by using the concept of bracketing in three ways: as a methodological, descriptive and analytical tool. [less ▲]

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See detailNitric Oxide nightglow as a tracer of inter-hemispheric circulation: Detailed comparison with the LMD-GCM
Stiepen, Arnaud ULg; IUVS team; Gonzales-Galindo et al

Conference (2016, September)

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See detailIsolation of bacteriophages against Klebsiella pneumoniae and in vivo activity
Thiry, Damien ULg; Passet, Virginie; Dufour, Nicolas et al

Poster (2016, September)

Klebsiella pneumoniae is a bacterial pathogen able to induce severe healthcare-associated or community-acquired infections in humans and animals. The constant emergence of antibiotic resistant strains ... [more ▼]

Klebsiella pneumoniae is a bacterial pathogen able to induce severe healthcare-associated or community-acquired infections in humans and animals. The constant emergence of antibiotic resistant strains reinforces the need to find alternatives to antibiotic treatments. The use of bacteriophages is a promising approach. The aim of this study was to isolate bacteriophages directed against K. pneumoniae strains and to test their efficacy in a murine model. Bacteriophages against five different K. pneumoniae (2 of capsular type K1 and K2 and 1 undetermined) were isolated and purified from waste water collected in Paris area. The morphology of plaques (zones of bacterial killing) was recorded and several of them were purified three times by successive replating. Phage titers were determined by serial dilutions on their respective hosts as well as on 18 other Klebsiella strains to identify their host range. Kinetics of bacterial lysis were monitored during 15h at 3 multiplicities of infection, in triplicates. For in vivo experiment, a total of 10 mice were inoculated with 200 µl of K. pneumoniae (4.6E+07 CFU) by oral gavage and the level of K. pneumoniae in fecal samples was monitored for 10 days. Five mice did not receive any treatment and 5 other mice received a cocktail of three bacteriophages (8E+07 PFU) at day 4 post-inoculation. A total of 54 bacteriophages were isolated and purified with titers ranging from 2E+5 to 3.6E+10 PFU/ml. The host range study showed that bacteriophages against K. pneumoniae have a specificity related to the capsular type of their bacterial host. Lysis kinetics of bacteria suggested that different phages were isolated. Despite difficulties with the murine intestinal model, evidence was obtained that bacteriophages are able to reduce intestinal carriage. Our results show that bacteriophages isolated against K. pneumoniae are specific for a given capsular type, although further studies are necessary to provide more details on this capsular specificity and its molecular determinants. To fully address the in vivo potential of phages, a reliable mouse model of intestinal carriage of K. pneumoniae strains needs to be established. [less ▲]

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See detailDiagnostic Value of PV/PA ratio in dogs with PH of pre-capillary origin
Roels, Elodie ULg; Merveille, Anne-Christine ULg; Malaize, Pierre-Louis et al

Conference (2016, September)

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See detailWhat do these cattle do in a biomedical research center?
Thoreau, François ULg

Conference (2016, September)

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See detailFiber technology, rope-making, textiles and the Lochstäbe from the Aurignacian of the Swabian Jura
Conard, Nicholas; Rots, Veerle ULg

Conference (2016, September)

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See detailBinary Phase Behavior of Saturated Triacylglycerols containing Stearic and Palmitic Acid
Bhaggan, Krishnadath ULg; Smith, K.W.; Blecker, Christophe ULg et al

Conference (2016, September)

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See detailMethodology to model the energy vulnerability of households in Europe based on the current mapping of fuel poverty and transport poverty and its likely evolution until 2040
Pierson, Charlotte; Reiter, Sigrid ULg

Conference (2016, September)

Fuel poverty refers to a situation in which an individual or household is not able to meet their basic energy needs. Fuel poverty is currently growing in the European Union. Research in this field is ... [more ▼]

Fuel poverty refers to a situation in which an individual or household is not able to meet their basic energy needs. Fuel poverty is currently growing in the European Union. Research in this field is often limited to the assessment of the current risk of fuel poverty based on energy consumptions due to housing. Urban sprawl generates a significant increase in energy consumption related to daily mobility, which generates energy poverty related to transportation needs. This article presents a methodology for modeling the current and future energy poverty of households in Europe on the basis of energy consumptions due to housing, to daily mobility and their combination. Indicators for fuel poverty and transport poverty will be based on Hills’ method, which is widely recognized internationally for fuel poverty assessment and which takes into account two thresholds: energy expenses of households and their available residual income. This article will outline the spatial modeling process of energy costs due to dwellings and mobility thanks to the coupling of a GIS tool, cadastral datasets, existing methods for the assessment of buildings and transport energy consumptions and updated databases (EPB certificates, detailed mobility surveys, data from smart meters, mobile phones and GPS). Different scenarios will be selected to predict the evolution of fuel and transport poverty until 2040 on the basis of national and European prospective studies or, alternatively, based on the historical evaluation of some key parameters and their extrapolation. The evolution of built-up areas will be model thanks to the multinomial logistic regression model (MLR) that enables to visualize the consequence of different urban densities expansion. The different parameters that will influence the evolution of fuel and transport poverty until 2040 will be highlighted (climate change, urban expansion, fuel prices, energy performance of buildings and vehicles, etc.). [less ▲]

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See detailThe BCCM/ULC collection to conserve and study the biodiversity of Polar cyanobacteria
Wilmotte, Annick ULg; Renard, Marine ULg; Lara, Yannick ULg et al

Poster (2016, September)

The BCCM/ULC public collection of Cyanobacteria has been funded since 2011 by the Belgian Science Policy Office. BCCM/ULC is currently holding 226 cyanobacterial strains, with 119 being of Antarctic ... [more ▼]

The BCCM/ULC public collection of Cyanobacteria has been funded since 2011 by the Belgian Science Policy Office. BCCM/ULC is currently holding 226 cyanobacterial strains, with 119 being of Antarctic origin (including 3 from the sub-Antarctic). The cyanobacteria constitute the bacterial phylum with the largest morphological diversity and their taxonomy is still a work in progress. In Polar Regions, Cyanobacteria represent key primary producers and are important drivers of the food webs in a wide range of aquatic to terrestrial habitats. For example, they build extensive benthic microbial mats in lakes and soil crusts in terrestrial biotopes. They have adapted to their environment, and may present interesting features to survive freeze/thaw cycles, seasonally contrasted light intensities, high UV radiations, dessication and other stresses. In this poster, we present the results of the 16S rRNA phylogenetic analysis for 76 Antarctic strains. This allows us to illustrate the diversity present in the collection, to detect lineages for which no genome has yet been sequenced, and to pinpoint taxonomic problems that should be addressed in a more comprehensive study. [less ▲]

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See detailComparative analysis of the respiratory microbiota of healthy dogs and dogs with canine idiopathic pulmonary fibrosis
Roels, Elodie ULg; Taminiau, Bernard ULg; Darnis, Elodie ULg et al

in Journal of Veterinary Internal Medicine (2016, September)

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See detailNonlinear vibration analysis of the SmallSat spacecraft: From identification to design
Detroux, Thibaut ULg; Noël, Jean-Philippe ULg; Masset, Luc ULg et al

Conference (2016, September)

The objective of the present contribution is to introduce nonlinear experimental and numerical tools and methods applicable to real-life structures. The study is illustrated using the SmallSat spacecraft ... [more ▼]

The objective of the present contribution is to introduce nonlinear experimental and numerical tools and methods applicable to real-life structures. The study is illustrated using the SmallSat spacecraft developed by Airbus Defence and Space, which possesses several localized nonlinearities. The computation of nonlinear normal modes and bifurcations reveals that the satellite possesses complex dynamics including modal interactions, quasiperiodic oscillations and isolated resonances. [less ▲]

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See detailSatellite Formation Control Using Continuous Adaptive Sliding Mode Controller
Cho, Hancheol ULg; Kerschen, Gaëtan ULg

in AIAA/AAS Astrodynamics Specialist Conference (2016, September)

The focus of this study is on the development of a robust controller with a simple gain adaptation for satellite formation control. The complete nonlinear dynamics of the motion of the follower satellite ... [more ▼]

The focus of this study is on the development of a robust controller with a simple gain adaptation for satellite formation control. The complete nonlinear dynamics of the motion of the follower satellite relative to the leader satellite is considered and the rigorous proof for the stability of the controlled formation system is given in the presence of unknown external disturbances and unknown mass of the follower satellite. Although the controller design is based on the concept of sliding mode control, the proposed control strategy is free from chattering and guarantees a finite-time convergence of the controlled system to the target area. Furthermore, a simple adaptive law to automatically update the control gain is suggested that does not require a priori knowledge of the uncertainties of the system. In addition, to guarantee the robustness from the beginning and to improve the transient performance, a new sliding surface is also constructed. Numerical simulations are carried out to demonstrate the effectiveness of the proposed adaptive controller to maintain a desired formation configuration by compensating for the initial offset errors and external disturbance effects including gravitational perturbations and atmospheric drag. [less ▲]

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See detailFunctional properties of extracellular polysaccharides produced by Enterobacter A47 grown on agro-food industry by-products
Antunes, Silvia; Freitas, Filomena; Alves, Vitor et al

Poster (2016, September)

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See detailSingle-Molecule Force Spectroscopy on Synthetic Helical Nanoarchitectures
Devaux, Floriane ULg; Li, Xuesong; Huc, Ivan et al

Poster (2016, September)

Inspired by the many folded conformations of the molecular machineries in nature, chemists have been developing the syntheses of artificial folded molecular architectures, namely foldamers. The ... [more ▼]

Inspired by the many folded conformations of the molecular machineries in nature, chemists have been developing the syntheses of artificial folded molecular architectures, namely foldamers. The investigation of these molecules using AFM-based Single Molecule Force Spectrosocopy (SMFS) allows the elucidation of both mechanochemical properties and conformational dynamics on the unimolecular scale in solution. The stepwise synthesis of aromatic oligoamide-based foldamers was designed to produce well-defined helically-folded molecular architectures. A PEO tether was coupled to one end of the foldamer. SMFS pulling experiments on this system yielded specific and reproducible force-extension patterns characteristic of single foldamers. Those patterns were further analyzed to determine unfolding forces and dynamics as well as to propose mechanistics hypotheses of the unfolding process. Several helical foldamers presenting variable lengths were considered. The force values measured for those foldamers are higher than those previously measured in natural biopolymers showing a high stability under a load and a propensity for the development of emergent properties. In addition, the increased stability of these aromatic oligoamide foldamers was confirmed by the observation of almost instantaneous reversibility of the unfolding under load. [less ▲]

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See detailPresentation of germplasm Health Unit-Gembloux
Massart, Sébastien ULg

Conference (2016, September)

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See detailAge-related differences in the dynamics of cortical excitability and cognitive inhibition during prolongedwakefulness
Gaggioni, Giulia ULg; Chelllappa, S.; Ly, J. et al

Conference (2016, September)

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See detailStructural design considering damage within an XFEM-level set framework
Noël, Lise ULg; Duysinx, Pierre ULg; Maute, Kurt

Conference (2016, September)

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See detailNew elicitors to protect winter wheat against Zymoseptoria tritici?
Le Mire, Géraldine ULg; Jijakli, Haissam ULg; Siah, Ali et al

Conference (2016, September)

Today, focus is made on the crucial protection of wheat, as one of the most cultivated crop plants in the world. This crop is constantly challenged by a persistent and harmful fungus known as Zymoseptoria ... [more ▼]

Today, focus is made on the crucial protection of wheat, as one of the most cultivated crop plants in the world. This crop is constantly challenged by a persistent and harmful fungus known as Zymoseptoria tritici, responsible of the Septoria Tritici Blotch (STB) disease. Control of this disease mainly depends on chemical products. However there is an urgentneed to identify and develop alternative methods as biocontrol tools to adopt an efficient IPM program for wheat. Elicitors are increasingly considered as promising biocontrol tools in the preventive treatment of plants against various diseases. These plant-immunity triggering compounds, also called “stimulators of plant natural defenses”, induce a general and systemic resistance of the plant to a large spectrum of biotic stresses. This study focuses on the screening of nine molecules of various origins and structures for their potential eliciting activity, to protect winter wheat against Zymoseptoria tritici. The protective efficacy of these molecules was evaluated under greenhouse conditions by comparing the infection severity of the treated plants with a water control. In addition, the biocide activity of the 9 candidates was tested in vitro directly towards the pathogen, by evaluating their impact on spore germination and fungal growth. Finally, the qPFD tool developed by INRA was used to study the expression of 23 defense genes in the wheat plant following the various treatments. These combined experiments finally allowed the selection of two molecules as potent elicitors: EGL1 and EGL4. They were efficient to reduce foliar disease symptoms from 60 to 80% on wheat under greenhouse conditions. The efficacy of these 2 promising molecules was thus evaluated in 2 field trials in 2016. The corresponding results will be presented and discussed, with the perspective to investigate the efficacy of these 2 potent elicitors to protect wheat cultivars showing different levels of sensitivity towards the pathogen. [less ▲]

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See detailAdaptation interculturelles du questionnaire "Patient-Rated Tennis Elbow Evaluation" pour les patients francophones
Kaux, Jean-François ULg; DELVAUX, François ULg; SCHAUS, Jean ULg et al

in 9ème Congrès commun SFMES - SFTS (2016, September)

Contexte: L’épicondylite latérale est une blessure commune chez les joueurs de tennis et les travailleurs physiques pour qui il existe un questionnaire en anglais qui en évalue la sévérité. Le ... [more ▼]

Contexte: L’épicondylite latérale est une blessure commune chez les joueurs de tennis et les travailleurs physiques pour qui il existe un questionnaire en anglais qui en évalue la sévérité. Le questionnaire « Patient-Rated Tennis Elbow Evaluation » (PRTEE) mesure la douleur et l’incapacité fonctionnelle du coude chez les patients souffrant d’une épicondylite latérale. Le questionnaire a déjà été traduit en suédois, en turc, en québécois, en italien, en néerlandais et en grec. Objectifs : Le but de cette étude est de traduire et de réaliser une adaptation interculturelle du questionnaire PRTEE en français et d’en évaluer sa fiabilité et sa validité. Matériel et Méthodes : Le PRTEE a été adapté interculturellement en français selon les lignes directrices internationales. Les participants (n=115) ont rempli le PRTEE-F, deux fois avec un intervalle de 30 minutes, le questionnaire Disabilities of Arm, Soulier and Hand (DASH), et le Short Form Health Survey (SF-36) pour évaluer la fiabilité et la validité du PRTEE-F. La cohérence interne (avec l’alpha de Cronbach), la fidélité test-retest (avec la corrélation intra-classe (ICC)) et la validité de construit (avec le coefficient de corrélation de Spearman). Résultats : Le PRTEE-F montre une fidélité test-retest bonne pour le score total (ICC 0,83) et pour les différents items (ICC 0,71-0,9). La traduction française possède une cohérence interne élevée (0,98). La corrélation entre le PRTEE-F et le DASH est forte pour le score total (rs=0,92, p<0.001), pour le sous-total symptomatique (rs=0,86, p<0.001) et fonctionnel (rs=0,93, p<0.001). Le PRTEE-F possède une corrélation forte avec une partie des sous-échelles convergentes du SF-36 (PF, RP et BP). Il y a une corrélation faible ou modérée avec les sous-échelles divergentes du SF-36 (REm, MH, SF et VT). Il n’y a pas d’effet plancher et plafond. Conclusion : La version française du questionnaire PRTEE a été adaptée interculturellement avec succès, et cette étude a montré que le PRTEE-F est fiable et valide pour évaluer les patients francophones souffrant d’une épicondylite latérale. [less ▲]

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See detailMonitoring topography of laboratory fluvial dike models subjected to breaching based on a laser profilometry technique
Rifai, Ismail ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in International Symposium on River Sedimentation: Stuttgart 19th-22d september 2016 (2016, September)

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See detailDomestic tools, hafting, and the evolution of technology: The Upper Palaeolithic of Hohle Fels as a case study
Taipale, Noora ULg; Conard, Nicholas J.; Rots, Veerle ULg

Poster (2016, September)

Innovations relevant to human evolution often involve subsistence technology, which can affect the success of individual groups, and Homo sapiens in general. However, Palaeolithic technologies include ... [more ▼]

Innovations relevant to human evolution often involve subsistence technology, which can affect the success of individual groups, and Homo sapiens in general. However, Palaeolithic technologies include more than just hunting tools, and a proper understanding of hunter-gatherer ways of living requires knowledge of the organisation of diverse tasks and activities, including the manufacture and maintenance of tools and other equipment. One central aspect of technological evolution is the development of tool hafting [1, 2], which is not only restricted to hunting and gathering implements, but also affects so-called domestic tool categories. We present the results of an on-going project that focuses on hafting and use of stone tools in the Upper Palaeolithic through detailed functional analysis of selected assemblages from European key sites (Hohle Fels, Abri Pataud, Maisières-Canal), which have yielded rich lithic and organic assemblages from secure chronological contexts. Here the focus is on classic Upper Palaeolithic tool categories, such as endscrapers and burins, from the Gravettian and Magdalenian levels of the cave site Hohle Fels (Germany) [3, 4]. We suggest that domestic tools can offer a valuable source material, since for most of them, hafting is not a necessity as it is for spear and arrow tips. An increase in hafting implies an increase in time investment, which has implications for task organisation and specialisation. The Hohle Fels assemblage offers an interesting case study for temporal changes (or continuity) in the frequency and techniques of tool hafting. The projectile technology shows a clear shift from the Gravettian to the Magadalenian, marked by the introduction of a microlithic technology (backed bladelets). For other tool categories, the changes seem more subtle. Our goal is to characterise the tools used in manufacture and maintenance tasks, and to evaluate whether the Gravettian to Magdalenian transition witnesses changes in tool design and use that go beyond hunting equipment. The observed differences between tool classes and time periods are explained with a reference to details of tool use, such as the rate of edge wear development and stone tool exhaustion, as well as shifts in treatment of organic raw materials. The results suggest that domestic tools can aid in understanding long-term technological evolution, and create a baseline against which we can (re)assess the role of shifts observed in technologies that are more susceptible to morphological change, such as projectiles. References: [1] Rots, V., 2013. Insights into early Middle Palaeolithic tool use and hafting in Western Europe: The functional analysis of level IIa of the early Middle Palaeolithic site of Biache-Saint-Vaast (France). J. Archaeol. Sci. 40, 497–506. [2] Barham, L., 2013. From Hand to Handle: The First Industrial Revolution. Oxford University Press, Oxford. [3] Conard, N. J., Bolus, M., 2003. Radiocarbon dating the appearance of modern humans and timing of cultural innovations in Europe: New results and new challenges. J. Hum. Evol. 44, 331–371. [4] Taller, A., Bolus, M., Conard, N. J., 2014. The Magdalenian of Hohle Fels Cave and the Resettlement of the Swabian Jura after the LGM. In: Otte, M., Le Brun-Ricalens, F. (Eds.), Modes de contacts et de déplacements au Paléolithique eurasiatique: Actes du Colloque international de la commission 8 (Paléolithique supérieur) de l'UISPP, Université de Liège, 28–31 mai 2012. Centre National de Recherche Archéologique, Luxembourg. [less ▲]

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See detailGait pattern of healthy old people for dual task walking condition
GILLAIN, Sophie ULg; Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg et al

in Gerontechnology (2016, September)

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See detailLes aménagements immobiliers. Problèmes d'identification et d'interprétation
Mas, Juliette ULg

Conference (2016, September)

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See detailUse of NIR hyperspectral imaging to detect and quantify nodules on root system of associated crops
Eylenbosch, Damien ULg; Pierreux, Jérome ULg; Fernández Pierna, Juan Antonio et al

Poster (2016, September)

Winter wheat and peas cultivated in association and harvested when grains are dry show promising results in temperate areas. This association reach a good land equivalent ratio, reduce the nitrogen ... [more ▼]

Winter wheat and peas cultivated in association and harvested when grains are dry show promising results in temperate areas. This association reach a good land equivalent ratio, reduce the nitrogen fertilizer needs and obtain high quality harvest. These results are probably explained by the transfer of nitrogen from peas nodules to wheat roots. To test this hypothesis, quantification of nodules is required. Visual counting of nodules is time consuming and discrimination between the two kinds of roots is almost impossible. A new method is therefore needed. Near infrared hyperspectral imaging (NIR-HIS) was tested as a rapid method to quantify the amount of nodules and roots of each species in soil samples. [less ▲]

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See detailImpact d’une réathlétisation précoce sur les performances des sportifs opérés d’une rupture du ligament croisé antéro-externe du genou
Duval, Thomas; Kaux, Jean-François ULg; LEHANCE, Cédric ULg et al

in 9ème Congrès commun SFMES - SFTS (2016, September)

Introduction : La reconstruction du ligament croisé antéro-externe du genou est une chirurgie lourde qui est suivie d’une longue période de rééducation. Le retour au sport après cette opération reste ... [more ▼]

Introduction : La reconstruction du ligament croisé antéro-externe du genou est une chirurgie lourde qui est suivie d’une longue période de rééducation. Le retour au sport après cette opération reste toutefois un défi. Plus d’un tiers des athlètes est incapable de reprendre son activité au même niveau. La peur de subir un nouvel accident reste un obstacle majeur à cette reprise sportive et la persistance de déficits fonctionnels est la première cause de récidives de déchirure ligamentaire. Matériels et méthodes : Notre échantillon comprend dix sujets, cinq dans le groupe bénéficiant d’une réathlétisation précoce et cinq dans le groupe témoin. Le premier groupe réalise une séance de réathlétisation précoce hebdomadaire (à raison d’une fois par semaine et ce, durant six mois) associée à la rééducation en kinésithérapie durant une durée de six mois. Le deuxième groupe bénéficie uniquement de séances de kinésithérapie classique respectant un protocole bien défini du CHU de Liège. Nous avons choisi de réaliser, en pré-opératoire, dans les deux groupes, un test isocinétique. En post-opératoire (après six mois), les sujets des deux groupes ont réalisé dans l’ordre suivant : un test isocinétique, un questionnaire de KOOS et enfin des tests fonctionnels (Hop test). Les séances de réathlétisation et de kinésithérapie sont suivies selon un protocole spécifique respectant l’individualisation propre à chaque patient. Résultats : L’analyse des tests isocinétiques et du questionnaire de KOOS, nous a permis de constater des différences entre les deux groupes au niveau des valeurs chiffrées mais qui ne sont cependant pas significatives (P level= 0,07). Par contre, l’analyse des résultats obtenus dans les tests fonctionnels (tests de sauts en longueur évaluant la performance en distance) a montré des différences significatives (P level= 0,04 pour le single hop et le triple hop test, P level= 0,02 pour le cross over hop test) entre les deux groupes et celles-ci sont au bénéfice du groupe ayant bénéficié d’une réathlétisation précoce. Conclusion : Dans cette étude, nous constatons une amélioration globale des performances en faveur du groupe ayant bénéficié d’une réathlétisation précoce. Cependant lors de l’analyse statistique et ce surtout concernant dans le test isocinétique, peu d’éléments évoluent de manière significative voir aucun pour le questionnaire de KOOS. Le faible échantillonnage de cette étude préliminaire intervient certainement dans ce constat. [less ▲]

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See detailEpidemiology and Molecular Variability of little cherry virus in Belgium
Tahzima, Rachid; Peusens, Gertie; Belïen, Tim et al

Conference (2016, September)

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See detailStudy of Meta-Analysis Strategies for Network Inference using Information-Theoretic Approaches
Pham, Cam Ngoc ULg; Haibe-Kains; Bellot, Pau et al

in IEEE Dexa workshops 2016 (2016, September)

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See detailClinically relevant optical properties of three types of intraocular lenses
Gatinel, Damien; Loicq, Jerôme ULg

Conference (2016, September)

Purpose: To experimentally compare the optical performance of three types of hydrophobic intraocular lenses (IOLs): extended depth of focus (TECNIS Symfony), bifocal (TECNIS ZMB00), and trifocal ... [more ▼]

Purpose: To experimentally compare the optical performance of three types of hydrophobic intraocular lenses (IOLs): extended depth of focus (TECNIS Symfony), bifocal (TECNIS ZMB00), and trifocal (FineVision GFree). Setting: Rothschild Foundation Paris, France - Liege Space Center Liège, Belgique Methods: Surface topography was analyzed by optical microscopy. Modulation transfer function (MTF) and spherical aberrations were determined on optical bench for variable pupil apertures and with two cornea models (0 µm and +0.28 µm). United States Air Force target imaging was analyzed for different focal points (near, intermediate, and far). Point spread function (PSF) and halos were quantified and compared. Results: All lenses presented step-like optic topography. For a pupil size of = 3 mm, distinctive MTF peaks were observed for all lenses: two peaks for the extended depth of focus and bifocal lenses with +1.75 and +4.00 diopters (D) addition, respectively, and three peaks for the trifocal lens with +1.75 and +3.50 addition for intermediate and near vision, respectively. The extended depth of focus and bifocal lens had slightly higher MTF at best focus with the +0.28 µm cornea model than with the 0 µm model, whereas the trifocal lens was likely to be more independent of the corneal spherical aberrations. Conclusions: Each lens appears to rely on light diffraction for optical performance, presenting halos with comparable intensities. For small pupil apertures, the MTF peaks for the far and intermediate focal distances of the trifocal and extended depth of focus lenses overlap, but the trifocal lens presented an additional MTF peak for the near focal points. [less ▲]

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See detailUse of NIR hyperspectral imaging to detect and quantify nodules on root system of associated crops
Eylenbosch, Damien ULg; Pierreux, Jérome ULg; Fernández Pierna, Juan Antonio et al

in ESA 14 -Growing landscape - Cultivating innovative agricultural systems (2016, September)

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See detailEngineering education at the heart of the Raw Materials Value Chain
Pirard, Eric ULg; Sonnemann, Guido

in Mazijn, Bernard (Ed.) Proceedings 8th Conference on Engineering Education for Sustainable Development (2016, September)

EIT Raw Materials has the mission to reinforce Europe’s innovation capacity by preparing the entrepreneurs and innovators of tomorrow. By fully integrating the three sides of the knowledge triangle ... [more ▼]

EIT Raw Materials has the mission to reinforce Europe’s innovation capacity by preparing the entrepreneurs and innovators of tomorrow. By fully integrating the three sides of the knowledge triangle (education, research and industry), the EIT Raw Materials aims at boosting the innovation process: from idea to product; from lab to market and from student to entrepreneur. A key mission of the EIT Raw Materials is to educate young professionals and specifically engineers and scientists by breaking the barriers of classical disciplines. The so-called T-shaped professional will have a strong entrepreneurial mindset and combine an in depth knowledge of his own discipline with a sound understanding of the challenges appearing along the whole raw materials value chain, such as exploration, extraction and processing of primary resources, recycling of secondary resources and substitution of critical and toxic materials. It is essential that these T-shaped professionals understand their role within the value chain as actors of a more circular economy. Every educational activity organized under the umbrella of the EIT Raw Materials (RM) Academy will therefore make sure to involve all stakeholders of the raw materials value chain and to contribute to raising awareness with respect to the societal function of raw materials and the related supply and availability challenges. To achieve these missions and create a long lasting impact, the RM Academy aims to innovate in terms of teaching, which includes: • The promotion of problem-based learning, self organisation and learning by doing. • The offer of an open learning environment and a series of online courses. • Enabling a high degree of mobility of students and professionals. • Facilitating access to experimental platforms and pilot plants for hands-on training • Adopting a strong multidisciplinary approach (e.g. joint courses across sectors) • Thinking beyond boundaries and systematically exploring and generating new ideas • Transforming innovations into feasible business solutions • Joint curriculum development Critical reflection, peer review processes as well as assessments and collegial discussions under the roof of the EIT Raw Material Academy will be used for continuing quality development of the programs. [less ▲]

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See detailChanges in crop yields, soil organic carbon and soil nitrogen content under climate change and variable management practices"
Dumont, Benjamin ULg; Basso, Bruno; Shcherbak, Iurii et al

Conference (2016, September)

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See detailTraduction inter-culturelle et validation du Kujala Anterior Knee Pain Scale (AKPS) en français
Kaux, Jean-François ULg; Bornheim, Stephen ULg; Remy, Gaël et al

in 9ème Congrès commun SFMES - SFTS (2016, September)

Introduction : Le syndrome fémoro-patellaire est l'un des problèmes de genou les plus répandus qui se caractérise par une douleur antérieure du genou dans des activités mettant en charge l'articulation ... [more ▼]

Introduction : Le syndrome fémoro-patellaire est l'un des problèmes de genou les plus répandus qui se caractérise par une douleur antérieure du genou dans des activités mettant en charge l'articulation fémoro-patellaire. Le Kuala Anterior Knee Pain Scale (Kujala AKPS) est un questionnaire utilisé pour évaluer les symptômes subjectifs, tels que les limitations fonctionnelles et la douleur antérieure du genou. Le questionnaire a déjà été traduit et validé en portugais brésilien, en persan, en chinois, en turque, et en néerlandais. Le but de cette étude est de traduire ce questionnaire en français afin d'en évaluer sa fiabilité et sa validité. Matériel et méthode : La traduction et l’adaptation interculturelle du questionnaire a été adaptée selon les recommandations internationales qui se présentent en 6 étapes : traduction initiale, synthèse des traductions, traduction de retour vers la langue d’origine, comité d'experts, test de la version pré-finale et approbation du comité experts. Une fois la version française obtenue, les participants (n=101) ont remplis 2 fois le Kujula AKPS avec un intervalle de 7 jours, et le Short Form Health Survey (SF-36) afin d'en évaluer les propriétés psychométriques (la cohérence interne, la fidélité test-retest et la validité de construit). Résultats : Le Kujula AKPS montre une fidélité test-retest élevée pour le score total (ICC 0,97). La traduction française possède une cohérence interne élevée (0,87). Le Kujula AKPS possède une corrélation forte avec une partie des sous-échelles convergentes du SF-36 (PF, RP et BP). Il y a une corrélation faible ou modérée avec les sous-échelles divergentes du SF-36 (MH, SF et VT). Il n’y a pas d’effet plancher et plafond. Conclusion : La version française du questionnaire Kujula AKPS étant compréhensible, semble avoir une bonne adaptation interculturelle. Cette étude a démontré que le Kujula AKPS-F est fiable et valide pour les patients francophones souffrant d'un syndrome rotulien. [less ▲]

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See detailLocking implants : polyaxial systems
Balligand, Marc ULg

in Proceedings of the 18th congress 2016 (2016, September)

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See detailEvaluation of chemical composition of 6 available by-products in the North of Morocco
El Otmani, Samira ULg; Ayadi, Mohamed; Hornick, Jean-Luc ULg et al

in Book of Abstracts of the 12th International Conference on Goats (2016, September)

In the northern region of Morocco, goat breeding is the dominant activity of farmers. This livestock plays a major economic role in the contribution of more than 70% of household income. His diet is based ... [more ▼]

In the northern region of Morocco, goat breeding is the dominant activity of farmers. This livestock plays a major economic role in the contribution of more than 70% of household income. His diet is based essentially on forest rangelands characterized by a variable feed offer. Therefore, it is necessary to diversify and improve its feed calendar to reduce overgrazing and increase livestock productivity. This work aims to characterize the chemical composition of agricultural by-products to be introduced in the diet of goat herd. The studied by-products was residues of watermelon, melon, zucchini, tomato, sunflower and peanut. These samples were collected in the different places in the region of the north of Morocco. In the laboratory, they were dried in oven at 60°C and subsequently ground and sieved to 1 mm diameter. The studied composition parameters were dry matter, ash, total nitrogen and fat. The chemical composition of these samples was determined by the methods of AOAC (1997). The means and the standard error of means were calculated using SAS software. From results, dry matter of by-products varies from 16.4% in watermelon residues and 96.7% in sunflower residues. The sunflower residues has a low mineral content of 3% while the melon residue contains 26.5% of mineral matter. The nitrogenous matter ranges from 2.6% in sunflower residue to 19.5% in watermelon residues. The highest fat content was recorded in melon residues (5.1%). Sunflower residue is lower in fat (1.4%). In conclusion, sunflower and peanut residues drier than the other by-products and contain less mineral matter, fat and nitrogenous matter. These by-products represent a free feed that can take their place in feed calendar in the northern region of Morocco for the goat population. However, to introduce them in the diet, it is necessary to evaluate their nutritional values. [less ▲]

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See detailRadioscopy laboratory diagnostic of epizootic diseases in Belgium and European countries
Cargnel, Mickaël ULg; Roelandt, Sophie; Van der Stede, Yves et al

Poster (2016, September)

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See detailRefractive and diffractive contribution of linear chromatic aberration (LCA) on depth-of-focus with trifocal intraocular lenses (IOLs)
Loicq, Jerôme ULg; Gatinel, Damien

Poster (2016, September)

Purpose: To investigate the refractive and diffractive contribution of LCA on depth of focus extension of trifocal IOLs in polychromatic light conditions Setting: University of Liège, Belgium; Fondation ... [more ▼]

Purpose: To investigate the refractive and diffractive contribution of LCA on depth of focus extension of trifocal IOLs in polychromatic light conditions Setting: University of Liège, Belgium; Fondation Ophtalmologique A. de Rothschild, Paris Methods: The LCAs associated with the three focal points of hydrophobic and hydrophilic diffractive FineVision trifocal IOLs (PhysIOL SA, Liège, Belgium), were simulated in an Arizona eye model and experimentally measured on an optical bench at 480, 546 and 650 nm. The effect of Abbe number and aperture on different IOL materials was also evaluated. Based on wavelength–dependent MTF through-focus curves and PSF properties, polychromatic behavior of the trifocal IOLs was assessed under mesopic and photopic conditions. Results: LCA amplitude and sign were different for each of the trifocal IOL focal points. The diffractive LCA for near and intermediate was independent of IOL material (GFree versus hydrophilic acrylic, 26%), while far vision LCA appeared to be controlled by the material Abbe number. Under polychromatic conditions, the LCA contributed to depth of focus extension with different types of lens material, providing maximal visual acuity under white light conditions at all distances. Conclusions: Diffractive trifocal IOLs show chromatic aberrations with an increase in depth of focus under polychromatic light. This effect likely contributes to the extended range of vision. [less ▲]

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See detailProcess oriented characterisation of oolitic iron concentrate during dephosphorisation by roasting and leaching
Ionkov, Krassimir; Gomes, Otavio; Neumann, Reiner et al

in Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016) (2016, September)

Phosphorus in iron ores is considered as a deleterious component to iron making reflecting in cold shortness of the produced steel. The present study investigates the phosphorus migration pattern ... [more ▼]

Phosphorus in iron ores is considered as a deleterious component to iron making reflecting in cold shortness of the produced steel. The present study investigates the phosphorus migration pattern resulting from thermal treatment of an oolitic-type iron concentrate with and without additives. To this end focused mineralogical and microscopic observations were performed. The results have shown that roasting with alkaline additive drives phosphorus outside the hematite hosting mineral, however it remains evenly distributed inside the volume of the oolites. It penetrates inside the newly formed cementing phases of Al-Na-Si-Fe-type and also fills the interstices between the crystals. Other than phosphorus, aluminum, calcium and iron tend also to migrate towards the amorphous-type cementing phase. Finally, the possibilities for P removal by means of magnetic separation and acid leaching of the roasted concentrate were evaluated. The obtained final product presents a standard iron concentrate suitable for steelmaking with its phosphorous being dropped from 0.71% to 0.05% and iron grade of a nearly 66% being reached. [less ▲]

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See detailWhen to use locking implants?
Balligand, Marc ULg

in Proceedings of the 18th ESVOT congress (2016, September)

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See detailPlant esterified oxylipins: structure – function relationship
Genva, Manon ULg; Andersson, Mats X.; Nasir, Mehmet Nail ULg et al

Poster (2016, September)

In the present work, high quantities of arabidopsides were extracted and purified from Arabidopsis thaliana L.

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See detailCreating undocumented EU migrants through welfare: The case of Belgium
Lafleur, Jean-Michel ULg; Mescoli, Elsa ULg

Conference (2016, September)

In the dual context of increased Central and Eastern European migration and of the global financial and economic crisis, several Northern European Member States have implemented (or debated) reforms of ... [more ▼]

In the dual context of increased Central and Eastern European migration and of the global financial and economic crisis, several Northern European Member States have implemented (or debated) reforms of their welfare regimes to restrict access to migrants coming from other EU Member States. As the debates on the so-called “welfare tourism” are intensifying in different parts of the EU, we can observe a growing trend among Member States to use welfare policies as instruments to limit the mobility of certain EU migrants. This stance is best illustrated with Prime Minister Cameron’s demand for four-year ban on EU migrants claiming in-work benefits. In Belgium, too, EU citizens have been particularly affected by this adverse context as the Migration Office (Office des Etrangers) has intensified controls against EU residents receiving welfare benefits. With this policy, authorities have been using a restrictive interpretation of the European Directive 2004/38 that allows Member States to remove residence permits from EU citizens who represent an “unreasonable burden on state finances”. As a consequence, the number of EU citizens expelled from Belgium on a yearly basis has jumped from 343 to 2,042 between 2010 and 2014. In this paper, we propose to focus on those EU citizens who see their freedom of circulation in the EU restricted after claiming social protection in their country of residence. Relying on fieldwork conducted with Italian and Romanian migrants who experienced the removal of their residence permit, we discuss the different resilience strategies of those EU citizens faced with the legal obligation to leave: such strategies include returning to the homeland, refusing to leave, mobilizing the support of migrant organizations, introducing individual appeals, and seeking to regularize their administrative status. In particular, we shall focus on the experience of EU migrants who have decided to stay in Belgium and experience the status of an undocumented EU migrant. This peculiarity of this status is visible in three respects: 1) expulsion is not enforced by local authorities, 2) migrants continue to be able to circulate between their homeland and the country where they no longer have a residence permit, and 3) they have a possibility to regularize their status if they can demonstrate to municipal authorities that they no longer represent “a burden” on Belgium’s public finances. Overall, confronting our data to the rich literature on undocumented third country nationals, we discuss the limits of EU citizenship as experienced by those who are denied the right to free movement. This paper relies primarily on multi-sited ethnographic fieldwork (in progress) conducted with Italian and Romanian migrants in Brussels and with individuals of the same nationality who decided to leave Belgium and return to their home country after the removal of their residence permit. Additional fieldwork includes semi-directed interviews with civil society organizations, trade unions, and consular authorities. The data collection process started in May 2014 and is expected to be finished in May 2016. [less ▲]

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See detailIdentification of bovine and porcine colistin-resistant mcr1-positive Escherichia coli.
Mainil, Jacques ULg; Muylaert, Adeline ULg; Saulmont, Marc et al

Conference (2016, September)

OBJECTIVE Polymyxins, especially colistin, have been used for years in veterinary medicine and were rediscovered a few years ago as last resort antibiotics in human medicine against multi-resistant Gram ... [more ▼]

OBJECTIVE Polymyxins, especially colistin, have been used for years in veterinary medicine and were rediscovered a few years ago as last resort antibiotics in human medicine against multi-resistant Gram negative bacterial pathogens. For years, only chromosome-mediated resistance to colistin was identified as a consequence of mutation(s) in lipid A-encoding genes. Recently, however, a plasmid-located gene (mcr1) was identified in Gram-negative enterobacteria and has since been found by PCR in several, but not all, bovine, human, porcine and poultry colistin-resistant Escherichia coli (Liu YY et al. Lancet Infect Dis, 2016, 16(2), 161-168; Nordmann P and Poirel L. Clin Microbiol Infect, 2016, 22, 398-400 ; Schwarz S and Johnson AP. J Antimicrob Chemother, 2016, in press, doi: 10.1093/jac/dkw274). The purpose of this study was to compare phenotypic and genetic for the detection of resistance to colistin and of the mcr1 gene in a collection of Escherichia coli isolated from different animal species and from humans. METHODS More than 3000 E. coli isolates from cattle, pigs, dogs, cats, horses, rabbits, chickens ducks and humans were tested for resistance to colistin by growing them on agar plates with 1g/ml of colistin. The Minimal Inhibitory Concentrations (MIC) of and the presence of the mcr1 gene in all growing isolates were determined using the E test® and colony hybridization assay with a mcr1 specific gene probe, respectively. The probe-positive isolates were further tested with the mcr1 gene specific PCR. RESULTS A total of 410 E. coli isolated grew on 1g/ml colistin-containing agar plates. The majority of isolates grew well, but several grew sparsely with only few isolated colonies. As determined by the E test®, MIC of 273 isolates (67%) was 1g/ml of colistin and higher; conversely, MIC of 137 isolates (33%) was lower than 1g/ml of colistin. Of those 410 E. coli isolates, 34 from pigs and bovines (9% of isolates growing on colistin-containing agar plates; 25% of isolates with MIC higher than 1g/ml) hybridized with the mcr1 gene-derived probe: 5 from pigs and 11 from bovines gave black spots (including five from the same calf), while 18 from pigs and one from bovine gave grey spots. All but one pig isolate had a MIC between 1.5 and 16 g/ml of colistin. Fifteen “black spot” probe-positive isolates tested positive with the mcr1 gene specific PCR as did 3 porcine “grey spot” probe-positive isolates, while the remaining 16 isolates repeatedly tested negative even after lowering the annealing temperature. CONCLUSION This study confirms that (i) the results of phenotypic assays for the detection of colistin resistance can not be always trusted; (ii) the mcr1 gene is not the only one mechanism of resistance to colistin; (iii) mcr1 variants may exist that can not be detected by the classical PCR. Phenotypic assays like growth on colistin-containing agar plates can still represent a first base screening assay, although the MIC determination using the E test® confirms a >1g/ml MIC for only 2 out of 3 growing isolates. Presence of mcr1 gene and putative variants (like the most recently described mcr2 gene; Xavier BB et al., Eurosurveillance, 21, 7 July 2016) in all probe-positive isolates will be confirmed after Whole Genome Sequencing that will also allow comparing the mcr1-positive plasmids and isolates from pigs and cattle to similar human E. coli isolates. Further studies should also be performed to identify the colistin resistance mechanism in mec-negative isolates. [less ▲]

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See detailThe added value of new GNSS to monitor the ionosphere
Warnant, René ULg; Deprez, Cécile ULg; Van de Vyvere, Laura

Conference (2016, September)

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See detailEnzymatic interesterification for the formulation of high quality zero trans fats from rapeseed oil
Gibon, V.; Closset, S.; Maes, J. et al

Conference (2016, September)

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See detailProduction of word stress by French speaking CLIL and non-CLIL learners of Dutch
Hiligsmann, Philippe; Rasier, Laurent ULg; Degrave, Pauline

Conference (2016, September)

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See detailIdentification of virulotypes and serotypes of enteropathogenic (EPEC) and Shigatoxigenic (STEC) Escherichia coli from healthy cattle at slaughterhouses in Wallonia.
Takaki, Shino; Duprez, Jean-Noël ULg; Fakih, Ibrahim et al

Poster (2016, September)

Escherichia coli producing the attachment-effacement (AE) lesion (EPEC) and/or Shiga toxins (STEC) cause enteritis and (bloody) diarrhoea in young calves and in humans, and are also present in the ... [more ▼]

Escherichia coli producing the attachment-effacement (AE) lesion (EPEC) and/or Shiga toxins (STEC) cause enteritis and (bloody) diarrhoea in young calves and in humans, and are also present in the intestines of healthy cattle. Besides the O157:H7 serotype, which is the main serotype causing STEC outbreaks in the world EPEC and STEC can belong to dozens of O serogroups. Of them, 9 have been frequently identified worldwide: O5, O26, O103, O104, O111, O118, O121, O145 and O165. The aim of this study is to identify the virulotypes and the O serotypes of EPEC and STEC isolated from healthy cattle at slaughterhouses in Wallonia. A total of 245 faeces (216 <1year-old bulls, 25 cows and 4 heifers) were sampled between April and June 2014 in 2 slaughterhouses in Wallonia and grown overnight at 37°C in Lauryl sulfate Enterobacteriaceae selective broth. The enrichment broths were assayed with an stx1, stx2 (Shiga toxin) and eae (AE lesion) triplex PCR and positive broths were inoculated onto 4 agar media: McConkey’s, Chromagar ES, Chromagar ES with tellurite and Chromagar STEC. Up to ten colonies per plate were picked up, sub-cultured and tested by the colony hybridization assay with gene probes targeting the stx1, stx2 and eae genes. The triplex PCR was again performed on all probe-positive isolates. The PCR-positive E. coli were subsequently assayed with two pentaplex PCR targeting the specific genes coding for the ten O serogroups listed above. Of the 2563 sub-cultured isolates, 744 isolates (29%) from 62 animals (25%) tested positive with the colony hybridization assay. Of them, 687 isolates (92%) from 59 animals were positive with the triplex PCR and the results of both tests were in agreement for 617 isolates (83%). One to 29 isolates per animal were probe- and PCR-positive. The positive isolates grew on Chromagar STEC (379; 55%), on Chromagar ES with tellurite (189; 28%), on Chromagar ES (62; 9%) or on McConkey’s agar (57; 8%). The most frequent virulotypes were eae+ (EPEC: 372 isolates; 54%), eae+stx1+ (AE_STEC: 119 isolates; 17%) and stx2+ (STEC: 118 isolates; 17%). In some animals different virulotypes were identified. The serogrouping with the two pentaplex PCR is in progress. AE-STEC, EPEC and STEC are excreted by 25% of the healthy cattle at slaughterhouses in Wallonia and different virulotypes can be excreted by the same animal. Conversely the methodology followed gives no precise idea of the actual level of excretion since the hybridization and PCR were performed after enrichment in selective broth. Therefore multiple isolates belonging to the same virulotype might represent the same clone. Identification of the serogroups and comparison by Pulsed Field Gel Electrophoresis should help to clarify that point. Quantitative (q)PCR is today the best method to quantify bacterial excretion, but is more expensive. The results of the hybridization and PCR correspond to between 80 and 90%. Though the colony hybridization is still useful for large-scale surveillance it needs radioactive probes for highest sensitivity and is more time-consuming than PCR. Therefore the PCR should be the first routine choice if it can be automatized at large scale. Further steps are the confirmation of the PCR results of the 70 isolates with different hybridization and PCR results and the identification of the serogroups with the two pentaplex PCR and later with PCR for the other serogroups, to compare them with isolates from young diarrhoeic calves and from humans. [less ▲]

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See detailApproche stratégique de formation du personnel local au sein des ONG internationales dans un contexte incertain : cas du Burundi
Hakizumukama, Alexis ULg

in Actes des Rencontres Internationales sur la Diversité (2016, September)

The human resources management issues is a major challenge for the current and future international organizations, especially those of the non merchant sector, as the environmental context in which they ... [more ▼]

The human resources management issues is a major challenge for the current and future international organizations, especially those of the non merchant sector, as the environmental context in which they operate is changing more and more quickly. Thus, beyond the mobilization and the gradual professionalization of volunteers to adapt their contribution to the missions of NGOs, these organizations are also experiencing a real need for personnel able to adapt without too much difficulty, the complexity of the local context whose evolution often proves unpredictable. But this labor, multiple and high skills, is often scarce on the local labor market. This finding essentially explains the presence of expatriates who work daily alongside local employees who may be employees and volunteers, and whose management requires a sufficiently coherent strategy with organizational goals and interests of these stakeholders. HRM strategy implementation within the subsidiaries shall submit their leaders to multiple challenges brought by a set of actors focused on different and even divergent interests. The model and HRM practices in any organization, reflect the dominant HRM strategy. During our research, we pay special attention to the evolution of HRM models (Pichault and Nizet, 2013) and strategy implemented in the training of local personnel by subsidiaries studied by relying on the theory of social regulation (Reynaud, 1997, 1999). The conclusions of our work indicate that the development of HRM strategy following a joint regulatory process appears best suited to international NGOs working in uncertain environment. [less ▲]

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See detailProperties of single fasteners - Ring shank nails
Mergny, Elke ULg; Sandhaas, Carmen

Conference (2016, September)

In Eurocode 5, nailed joints are designed using the Johansen model extended with the rope effect. The necessary input parameters are embedment strength fh, yield moment My and withdrawal capacity Fax. We ... [more ▼]

In Eurocode 5, nailed joints are designed using the Johansen model extended with the rope effect. The necessary input parameters are embedment strength fh, yield moment My and withdrawal capacity Fax. We can obtain these parameters by using empirical equations based on regression analysis. These equations are given by EC5, for smoothed nails. However, especially for ring shank nails, no consistent rules are given in the current version of Eurocode 5 and the values must be taken from technical documents of the single nails. The aim of this STSM was firstly to develop a database. It was based on 96 reports, mostly about ring shank nails tests, carried out for certification purposes, from 33 producers. Based on this extensive database, regression analyses have been carried out, especially the wire tension strength 𝑓𝑢, the yield moment 𝑀𝑦 and nail tension capacity 𝐹𝑡, all are direct nail proprieties. Potential benefits are more robust design models covering a large range of nails, reduced testing and simplified design equations. [less ▲]

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See detailSensitivity of the regional climate model ALARO-0 to land surface changes
Berckmans, Julie; Henrot, Alexandra-Jane ULg; Jacquemin, Ingrid ULg et al

Poster (2016, September)

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See detailAn innovative non-animal chitosan hydrogel is able to restore the rheology of osteoarthritis synovial fluid ex vivo
Henrotin, Yves ULg; Rocasalbas, Guillem; Chausson, Mickaël et al

Poster (2016, September)

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See detailSystematic Downstream Development, Optimization and Equipment Design for Biobased Products and Processes
Bednarz, Andreas; Rüngeler, Bettina; Scherübel, Peter et al

in Chemie Ingenieur Technik (2016, September), 88(9), 1375-1376

Biobased synthesis poses specific challenges due to the properties of raw materials, intermediates, and products. They are induced by the higher oxygen content as compared to fossil feedstock. Thus low ... [more ▼]

Biobased synthesis poses specific challenges due to the properties of raw materials, intermediates, and products. They are induced by the higher oxygen content as compared to fossil feedstock. Thus low vapor pressure, higher viscosity, low concentration in aqueous solution will require new, preferably liquid-based downstream processes, for which many different options can be proposed. A systematic method to evaluate such a multitude of options based on cascaded option trees is presented, which combines representation and evaluation of options on a suitably chosen level of detail. Criteria, which have to be fulfilled by the options, are flexibly evaluated ranging from input of experts to detailed simulation. Clear visualization also allows transparent communication of results to members of interdisciplinary teams and project partners. The method is demonstrated for extractive separation steps including real-world problems encountered. This includes high viscosities, presence of solids or microorganisms leading to crud formation, and optimization of process conditions solving the conflicting challenges balancing e.g. between low toxicity to microorganisms and process efficiency. [less ▲]

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See detailInvestigation of the coagulation system in canine idiopathic pulmonary fibrosis
Roels, Elodie ULg; Bauer, N.; Lecut, Ch. et al

Poster (2016, September)

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See detailSIMULATION AND ANALYSIS OF RECEPTOR DYNAMICS IN A BMP REGULATORY NETWORK
Germain, Morgan ULg; Bolander, Johanna; Ji, Wei et al

Poster (2016, September)

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See detailAssessment of the fluid-structure interaction capabilities for aeronautical applications of the open-source solver SU2.
Sanchez, Ruben; Kline, Heather; Thomas, David ULg et al

in Proceedings of the VII European Congress on Computational Methods in Applied Science and Engineering (2016, September)

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See detailThere is more to life than subsistence: use-wear and residue analyses on pre-Still Bay stone tools at Sibudu
Rots, Veerle ULg; Lentfer, Carol ULg; Schmid, Viola et al

Conference (2016, September)

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See detailVITRICELL: new efficient method for cryopreserving cells by vitrification
Connan, Delphine ULg; Ectors, Fabien ULg; Antoine, Nadine ULg et al

Conference (2016, September)

Using stem and related cells for clinical purposes requires efficient and bio-safe handling. Cryopreservation is a mandatory key step of storage and transportation, during which cells undergo extreme ... [more ▼]

Using stem and related cells for clinical purposes requires efficient and bio-safe handling. Cryopreservation is a mandatory key step of storage and transportation, during which cells undergo extreme physical and chemical conditions prone to alter their viability as well as their biological properties. Conventional slow-freezing often results in poor survival rates mainly due to excessive cell dehydration and water crystallization. We have addressed this problem by developing a new cryopreservation method based on aseptic and automatable vitrification in sealed french straws. Furthermore, only bio-safe and chemically defined cryopreservation media are used. We have demonstrated that, despite additional constraints, our aseptic vitrification process is more efficient (recovery rates, morphology, pluripotency…) than conventional slow freezing for cryopreserving human pluripotent stem cells (hPSCs). These results have been confirmed on various sensitive stem cell-like lines and embryos from human and non-human species. VITRICELL will soon provide researchers and clinicians with its vitrification kits, allowing to upgrade the current yields and safety after cryopreservation of their high-value cells. [less ▲]

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See detailValeurs de référence de débit de filtration glomérulaire en population noire-africaine
Yayo, E; Monnet, D; Attoungbré, M.-L. et al

in Néphrologie & Thérapeutique (2016, September), 12(5), 273

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See detailTeaching of Life Cycle Assessment methodology to sensitize future engineers to sustainable development
Belboom, Sandra ULg; Léonard, Angélique ULg

in Proceedings of the 8th Conference on ‘Engineering Education for Sustainable Development’ (2016, September)

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See detailSetting up ex-vivo biomechanics studies
Balligand, Marc ULg

in Proceedings of the 18th ESVOT congress (2016, September)

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See detailTargeted mutagenesis of orphan GPCRs of the SREB family
Laschet, Céline ULg; Dupuis, Nadine ULg; Soni, Arvind ULg et al

Poster (2016, September)

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See detailUniversité d'été du Cifen 2015 : insertion professionnelle et parcours enseignants. Mise en perspective et présentation du programme de la journée
Simons, Germain ULg

in Didactiques en Pratique (2016, September), 2

Cette communication ouvrait l'Université d'été 2015 du Cifen. La thématique du colloque : "insertion professionnelle et parcours enseignants" y fut brièvement présentée, de même que les questions qui ... [more ▼]

Cette communication ouvrait l'Université d'été 2015 du Cifen. La thématique du colloque : "insertion professionnelle et parcours enseignants" y fut brièvement présentée, de même que les questions qui allaient baliser cette journée d'études. Ensuite le programme de la journée fut rappelé aux participants. [less ▲]

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See detailComparing conventional excellence: moral and technical features of "good research"
Charlier, Nathan ULg

Conference (2016, September)

During a stay at Lancaster University, I was struck to discover how the institutional branding relied on the rhetoric of excellence. Several flags scattered over the campus are displaying statements such ... [more ▼]

During a stay at Lancaster University, I was struck to discover how the institutional branding relied on the rhetoric of excellence. Several flags scattered over the campus are displaying statements such as: "our physicists helped discover the Higgs boson particle", "Lancaster University is ranked among the top 10 universities in the UK", "our volcanologists made the first observation of a rare type of lava", etc. These quotes convey technologies such as rankings, but also moral and epistemological aspects regarding the role and status of scientific knowledge. This fostered my reflection regarding the fieldwork I made in different research institutions located in Belgium: while academic excellence is not at the core of their branding per se, it is indeed a key issue for many actors concerned with research governance. My paper proposes to map the different ways to frame the notion of excellence in four institutions: two large biotech research centres and two universities in Flanders and Wallonia. It relies on 25 semi-structured interviews with tenured academics involved in their institution's research management. The paper will compare how "good research" is valued in different settings: what counts when one evaluates the "excellence" of a scientific production/career? To which technologies, indicators and to which "moral principles" are interviewees referring to when they discuss excellence? How do they engage in criticizing certain framings and praise others? Eligible for the rhetoric or comparative panel, my contribution will present four distinct institutional conventions that govern research practices and sorts the good scientist from the bad. [less ▲]

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See detailUtilisation of CO2 from an Industrial source for Methanol production
Font-Palma, Carolina; Douven, Sigrid ULg; Léonard, Grégoire ULg

Conference (2016, September)

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See detailChemical profiling of major components in natural waxes to elucidate their roles in liquid oil structuring
Diem Doan, Chi; Ming To, Chak; Lynen, Frederik et al

Poster (2016, September)

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See detailA new method for identifying experimental and Palaeolithic hafting adhesives using GC×GC-HRTOFMS
Cnuts, Dries ULg; Perrault, Katelynn ULg; Dubois, Lena ULg et al

Poster (2016, September)

Hafting adhesives can be seen as an indication of the cognitive and technical capabilities of the manufacturers and therefore play a key role in the debate on human evolution [1], [2]. These adhesives are ... [more ▼]

Hafting adhesives can be seen as an indication of the cognitive and technical capabilities of the manufacturers and therefore play a key role in the debate on human evolution [1], [2]. These adhesives are mainly from plant origin (resins, gums or tar) and are often mixed with beeswax and other additives in order to make them less brittle. Archaeological evidence indicates that these adhesives were already in use in the Paleolithic from at least 120.000 years ago [3]. Discoveries for this period are however very rare and only become abundant from the Neolithic onwards [4]. Their longer exposure to biochemical alteration processes limits the chance of survival in the archaeological record. If they are present on Paleolithic stone tools, they appear often in such small quantities that they are challenging to identify by traditional gas chromatography – mass spectrometry (GC-MS) or even to remove them effectively from the stone tool. The destructive nature of traditional GC-MS analysis can damage these rare samples for other analyses. Our study aims to overcome this problem by using headspace solid phase microextraction (HS-SPME) for sample extraction and analysis by comprehensive two-dimensional gas chromatography –high-resolution time-of-flight mass spectrometry (GC×GC-HRTOFMS), which has the benefit of analyzing the volatile organic compound (VOC)s from the substance and it does not destroy the complete matrix of the adhesive. We present the results of a pilot study intended to examine the potential of this technique for analyzing Palaeolithic adhesives. The study involved (1) an examination of experimental compound adhesives (containing pine and spruce resin, acacia gum and birch tar; beeswax and additives like charcoal, flax or ochre), (2) a blind test on experimental samples to test the reliability of the method and to determine the minimal quantity necessary for analysis, and (3) the analysis of different Palaeolithic adhesives and of experimental samples of at least 15 years old. The analysis was done on extracted and non-extracted adhesives. A unique chromatographic fingerprint was obtained for all experimental adhesive samples. The VOC profile of these adhesives proved to be extremely complex and therefore benefitted significantly from multidimensional separation techniques. GC×GC-HRTOFMS provided an optimal chromatographic separation of adhesive components. HRTOFMS data was used in order to obtain high-resolution mass spectral data to contribute to compound identification. Our study demonstrates that GC×GC-HRTOFMS is a well suited method for identifying small quantities of compound adhesives with significant potential for Palaeolithic contexts. The additional sensitivity afforded by this technique in comparison to traditional GC-MS is a substantial benefit for these quantities. Furthermore, by only analyzing the VOCs of the adhesives, these rare archeological samples are not destroyed and can still be used for other types of analysis. [1] L. Wadley, ‘Compound-Adhesive Manufacture as a Behavioral Proxy for Complex Cognition in the Middle Stone Age’, Curr. Anthropol., vol. 51, no. s1, pp. S111–S119, Jun. 2010. [2] L. Barham, From Hand to Handle: The First Industrial Revolution. Oxford: Oxford University Press, 2013. [3] P. P. A. Mazza, F. Martini, B. Sala, M. Magi, M. P. Colombini, G. Giachi, F. Landucci, C. Lemorini, F. Modugno, and E. Ribechini, ‘A new Palaeolithic discovery: tar-hafted stone tools in a European Mid-Pleistocene bone-bearing bed’, J. Archaeol. Sci., vol. 33, no. 9, pp. 1310–1318, Sep. 2006. [4] M. Regert, ‘Investigating the history of prehistoric glues by gas chromatography-mass spectrometry.’, J. Sep. Sci., vol. 27, no. 3, pp. 244–54, Feb. 2004. [less ▲]

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See detailHome blood pressure in kidney transplant recipients (Ktr) - Validity of different schedules of self-monitoring
SAINT-REMY, Annie ULg; WEEKERS, Laurent ULg; BONVOISIN, Catherine ULg et al

in Journal of Hypertension (2016, September), 34(e supplement 2), 119

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See detailDetection of blood derived products in feed using targeted triple-quadrupole MS
Lecrenier, Marie-Caroline ULg; Dieu, Marc; Veys, Pascal et al

Conference (2016, September)

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See detailGay adoptive families: between stressors and losses. 2 contrasted cases
Messina, Roberta ULg; D'Amore, Salvatore ULg

Conference (2016, September)

Gay adoptive families are more and more present in the European context (currently the full joint adoption by same sex couples is granted in 9 European countries and 4 countries permit the step-child ... [more ▼]

Gay adoptive families are more and more present in the European context (currently the full joint adoption by same sex couples is granted in 9 European countries and 4 countries permit the step-child adoption). Despite the numerous studies on lesbian and gay parent- headed families, the current literature that has focused specifically on gay adoptive parent families remains rather limited. This research has the aim of increase the scientific knowledge on this new family form with the purpose to shed light on typical stressors experienced by parents and by children. The specificity of these families consists, among others, to be at the crossroads of two levels of complexity: being adoptive families and being LG families. Like all LG families, gay adoptive families have to face different stressors such as the lack of support by families of origin and social context, the need to hide their parenting project, the fear to not be considered parents "like the others" and the worry that their children are discriminated because of parents’ homosexuality. In addition to these stressors linked to the family structure, there is the challenge to adopt a child already marked by difficult life experiences and abandonment. The specificity of these families is the product of the difficulties encountered from the couples to became parents and of the experience of loss experienced by the child. The result of this whole meeting, is often found in parents’ strategies to face stressors and in the weight that the loss takes on for the child and in the relational dynamics of the family. Through two contrasting cases we will reflect on the possible adaptive strategies of parents and on the importance of integrating the child history in a new family story in which past, present and future come together and don’t know fractures. [less ▲]

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