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See detailSofosbuvir in combination with simeprevir +/- ribavirin in genotype 4 hepatitis C patients with advanced fibrosis or cirrhosis: real-life experience from Belgium
Moreno, C; Lasser, L; DELWAIDE, Jean ULg et al

in Acta Gastro-Enterologica Belgica (2016, March), 79(1), 08

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See detailDiscovery of novel accessible proteins for therapeutic targeting of hepatocellular carcinoma.
Turtoi, Andrei ULg; Otaka, Y; Rokudai, S et al

in Acta Gastro-Enterologica Belgica (2016, March), 79(1), 13

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See detailBois, brique et fer : Approche multi-disciplinaire de la charpente de l'église Notre-Dame du Sablon, Bruxelles (RBC)
CREMER, Sarah; FRAITURE, Pascale; Hoffsummer, Patrick ULg et al

in Archaeologia Mediaevalis (2016, March), 39

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See detailAzacytidine Enhances Regulatory T-Cells In Vivo and Prevents Experimental Xenogeneic Graft-Versus-Host Disease
Ehx, Grégory ULg; Fransolet, Gilles ULg; de Leval, Laurence ULg et al

in Biology of Blood and Marrow Transplantation (2016, March), 22(3), 393

Background. The demethylating agent 5-azacytidine (AZA) has proven its efficacy as treatment for myelodysplastic syndrome and acute myeloid leukemia. In addition, AZA can demethylate FOXP3 intron 1 ... [more ▼]

Background. The demethylating agent 5-azacytidine (AZA) has proven its efficacy as treatment for myelodysplastic syndrome and acute myeloid leukemia. In addition, AZA can demethylate FOXP3 intron 1 (FOXP3i1) leading to the generation of regulatory T cells (Tregs). Objective. We investigated the impact of AZA on xenogeneic graft-versus-host disease (xGVHD) in a humanized murine model of transplantation, and described the impact of the drug on human T cells in vivo. Methods. In order to induce xGVHD, human peripheral blood mononuclear cells (huPBMC) were administered intravenously in NOD-scid IL-2Rγnull (NSG) mice. Results. AZA successfully improved both survival (p<0.0001) and xGVHD scores (p<0.0001). Further, AZA significantly decreased human T-cell proliferation as well as INF-γ and TNF-α serum levels, and reduced the expression of GRANZYME B and PERFORIN 1 by cytotoxic T cells. In addition, AZA administration significantly increased the function, proliferation and frequency of Tregs through demethylation of FOXP3i1 and higher secretion of IL-2 by conventional T cells due to IL2 gene promoter site 1 demethylation. Interestingly, among AZA-treated mice surviving the acute phase of xGVHD, there was an inverse correlation between the presence of Tregs and signs of chronic GVHD. Finally, Tregs harvested from the spleen of AZA-treated mice were suppressive and stable over time since they persisted at high frequency in secondary transplant experiments. Conclusion. These findings emphasize a potential role for AZA as prevention or treatment of GVHD and other autoimmune diseases. [less ▲]

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See detailNewborn screening for sickle cell disease : 13 years at the CHR "La Citadelle", Liège
Sepulchre, Edith; Ketelslegers, Olivier; Minon, Jean-Marc et al

in Tijdschrift van de Belgische Kinderarts = Journal du Pédiatre Belge (2016, March), 18(1), 107

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See detailGenetics 2 Multiple fractures, genetics to the rescue!
HENNUY, Nadège ULg; NYAMUGABO MUNYERE NKANA, Kindja ULg; FLORKIN, Benoît ULg et al

in Belgian Journal of Paediatrics (2016, March), 18(1), 63

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See detailChattering-free Sliding Mode Control for Propellantless Rendez-vous using Differential Drag
Cho, Hancheol ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in International Conference on Astrodynamics Tools and Techniques (2016, March)

This paper develops a differential drag-based sliding mode controller for satellite rendez-vous. It is chattering-free and avoids bang-bang type control to adjust the relative motion more efficiently. In ... [more ▼]

This paper develops a differential drag-based sliding mode controller for satellite rendez-vous. It is chattering-free and avoids bang-bang type control to adjust the relative motion more efficiently. In spite of uncertain nonlinear perturbations and disturbances, it is shown that the in-plane relative motion between two satellites can be effectively controlled by regulating the drag difference. An adaptive tuning rule is also presented such that the errors are suppressed to lie within a desired error box. The proposed controller is simple and easy to implement in a small satellite, and numerical simulations are carried out to demonstrate its effectiveness in a high fidelity environment. [less ▲]

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See detailMulticenter Belgian experience of sofosbuvir medical need program in pre-and post-liver transplantation patients: safety and efficacy results.
Degré, D; Laleman, W; Verhelst, X et al

in Acta Gastro-Enterologica Belgica (2016, March), 79(1), 15

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See detailLINKING CATTLE GRAZING BEHAVIOR TO METHANE AND CARBON DIOXIDE DYNAMICS
Blaise, Yannick ULg; Lebeau, Frédéric ULg; Andriamandroso, Andriamasinoro ULg et al

in Communications in Agricultural and Applied Biological Sciences (2016, February), 81(1), 107-112

Various methods are presently used to measure methane (CH4) emissions of ruminants on pasture. Those measurements are essential to evaluate nutritional strategies to mitigate enteric CH4 emissions as well ... [more ▼]

Various methods are presently used to measure methane (CH4) emissions of ruminants on pasture. Those measurements are essential to evaluate nutritional strategies to mitigate enteric CH4 emissions as well as addressing the selection of low producing individuals. On pasture and in the barn, variations in CH4 emissions are observed depending on the time of the day. However, no studies have been made to link these diurnal fluctuations to behavioural phases, especially on pasture. The aim of this study was to understand the individual dynamics of CH4 production and their links to the grazing behaviour. For this purpose, a new tool was specifically developed. Five red-pied dry cows were equipped with infrared CH4 and carbon dioxide (CO2) sensors measuring concentrations in the exhaled air at 4 Hz. The animals were equipped with a heart rate belt (HR) and motion sensors to detect their feeding behaviours (grazing vs. rumination) for periods of 8 h/d. Wind speed (WS) was also monitor to verify interference with sampled gas concentrations. Results showed that using the CH4:CO2 ratio reduced the interference with WS that was observed on raw CH4 and CO2 concentration signals. CH4:CO2 ratio average over 5 min periods indicated that CH4 emissions were lower during grazing than rumination (P<0.01). The eructation frequency during grazing (0.48 eructation/min, P<0.01) was also lower than during rumination (0.65 eructation/min). HR was higher during grazing that rumination. Because HR is usually linked to metabolic CO2 production intensity, hence influencing the denominator of the CH4:CO2 ratio, further investigation should focus on the quantification of changes in fermentative and metabolic CO2 emissions along the day to estimate total CH4 production more accurately and the relationship between CH4 emissions patterns and post-feeding times. [less ▲]

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See detailSuivi de quelques mammifères protégés en Wallonie.
Schockert, Vincianne ULg; Lambinet, Clotilde ULg; Libois, Roland ULg

in FORÊT.NATURE (2016, February), 138

Depuis 2005, la "convention Mammifères" qui lie le SPW et l'U.Lg a pour but d'actualiser les connaissances sur les petits mammifères non volants en Wallonie: distribution et (micro-) habitats utilisés ... [more ▼]

Depuis 2005, la "convention Mammifères" qui lie le SPW et l'U.Lg a pour but d'actualiser les connaissances sur les petits mammifères non volants en Wallonie: distribution et (micro-) habitats utilisés. Ces 30 dernières années, quelques mesures ont eu un impact sur les populations: mise sous statut de protection, renforcement général de la règlementation environnementale (Natura 2000, code forestier...) et épizooties. Quelques exemples montrent la diversité et la spécificité des suivis nécessaires en vue d'évaluer leur état de conservation: cinq espèces de musaraignes protégées, la loutre, la martre, le muscardin et le blaireau. Pour ce dernier, la comparaison des niveaux de population et de dégâts de l'année 2012 démontre l'importance de disposer de données solides sur les populations pour éviter une révision inappropriée de leur statut [less ▲]

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See detailOverview of Superhydrophilic, Photocatalytic and Anticorrosive Properties of TiO2 Thin Films Doped with Multi-walled Carbon Nanotubes and Deposited on 316L Stainless Steel
Léonard, Géraldine ULg; Remy, Simon; Heinrichs, Benoît ULg

in Materials Today: Proceedings (2016, February), 3(2), 434-438

TiO2 films with MWCNTs are produced for anticorrosive applications to increase the lifetime of steel materials. TiO2 has two additional properties, photoactivity and superhydrophilicity. Two TiO2 samples ... [more ▼]

TiO2 films with MWCNTs are produced for anticorrosive applications to increase the lifetime of steel materials. TiO2 has two additional properties, photoactivity and superhydrophilicity. Two TiO2 samples, synthesized in aqueous or alcoholic media, have been doped with MWCNTs. The material which best combines anticorrosive, superhydrophilic and photocatalytic properties, is the one produced in aqueous medium (Aq-TiO2-CNT). Doping with MWCNTs increases the photodegradation of p-nitrophenol from 18% to 50%. MWCNTs allow to reduce the corrosion current and the corrosion potential. The good superhydrophilicity of TiO2 is kept on stainless steel with a contact angle after illumination around 5°. [less ▲]

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See detailComputed Tomography and Magnetic Resonance Findings in Athletes at Risk for Sudden Cardiac Death
Ghekiere, Olivier; Nchimi Longang, Alain ULg; Bijnens, Eric et al

in Journal of the Belgian Society of Radiology (2016, February), 1

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See detailTrophic diversity of seagrass detritus copepods: A consequence of species-specific specialization or a random diet?
Mascart, Thibaud; De Troch, Marleen; Remy, François ULg et al

in PeerJ PrePrints (2016, January 13), 4

One of the major ecological research questions is understanding how biodiversity influences ecosystem functioning. Unravelling interspecific feeding preferences of organisms with overlapping trophic ... [more ▼]

One of the major ecological research questions is understanding how biodiversity influences ecosystem functioning. Unravelling interspecific feeding preferences of organisms with overlapping trophic niches will give part of the answer. Subsequently, the present study displays the trophic diversity of a benthic copepod community in a North-Western Corsican Posidonia oceanica seagrass ecosystem. These seagrass meadows are often interrupted by bare sand patches serving as deposition area for loose detritus. The accumulated macrophytodetritus, mainly derived from senescent macrophytes, harbour a diverse community of Harpacticoida (Crustacea, Copepoda). The most abundant copepods (i.e. three harpacticoids and one calanoid, belonging to different eco-morphological types) and their potential food sources (i.e. macrophytodetritus, epiphytic biofilm and suspended organic matter) were analysed for stable isotope ratios (δ13C, δ15N) and total lipids content. The results revealed a harpacticoid copepod feeding preference towards the epiphytic biofilm, while calanoid copepods preferred suspended organic matter. Additionally, a species-specific composition variation revealed finer partitioning of food resources (e.g. different micro-organisms present in the biofilm like bacteria, diatoms, fungi) over time.In conclusion, results showed species-specific food preferences, resulting in trophic niche and resource partitioning. Every eco-morphological type seems to cope in different ways with temporal fluctuations of food sources to comply with their nutritional needs. This illustrates the high resilience of the copepod community present in macrophytodetritus accumulations. Moreover, our results underlined the importance of multiple biomarker species-specific analysis in trophic ecology studies, especially in complex and dynamic environments offering numerous food items to consumers. [less ▲]

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See detailProjet Neworld: Evaluation informatisée des capacités de multitâches en neuropsychiatrie
Laloyaux, Julien ULg; Van Der Linden, M; Levaux, M-N et al

in Encéphale (L') (2016)

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See detailConclusions des journées d’étude "Cher Monsieur Madrane"
Fierens, Jacques ULg

in Journal du Droit des Jeunes (2016), 354

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See detailApports de l'électrophysiologie à la médecine d'expertise
WANG, François-Charles ULg

in Consilio manuque (2016), 1

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See detailAvelumab (MSB0010718C ; anti-PD-L1) as a first-line treatment for patients with advanced NSCLC from the JAVELIN Solid Tumor phase 1b trial : safety, clinical activity, and PD-L1 expression
Verschraegen, C.; Chen, F.L.; Spigel, D.R. et al

in Journal of Clinical Oncology (2016), 34

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See detailEpisodic memory and aging: The effect of perceptual processing fluency on recognition memory processes
Bastin, Christine ULg; Willems, Sylvie ULg

in Journal of Cognitive Neuroscience (2016), S2016

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See detailEn-deçà du langage : Communauté et historicité de l’antéprédicatif selon Heidegger
Zincq, Aurélien ULg

in Bulletin d'Analyse Phénoménologique (2016), XII(2), 251-274

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See detailDiffusion MRI for following tumor modifications after neoadjuvant radiotherapy.
LALLEMAND, François ULg; Leroi, Natacha ULg; Bahri, Mohamed Ali ULg et al

in Radiotherapy & Oncology (2016), 119

Neoadjuvant radiotherapy (NeoRT) improves tumor local control and tumor resection in many cancers. The timing between the end of the NeoRT and surgery is driven by the occurrence of side effects or the ... [more ▼]

Neoadjuvant radiotherapy (NeoRT) improves tumor local control and tumor resection in many cancers. The timing between the end of the NeoRT and surgery is driven by the occurrence of side effects or the tumor downsizing. Some studies demonstrated that the timing of surgery and the RT schedule could influence tumor dissemination and subsequently patient overall survival. We demonstrated the impact of NeoRT on metastatic spreading in a Scid mice model. After an irradiation of 2x5gy, we show more metastasis in the lung when the mice are operated at day 4 compared to day 11. Here, our aim is to evaluate with functional MRI (fMRI) the impact of the radiation treatment on the tumor microenvironment and subsequently to identify non-invasive markers helping to determine the best timing to perform surgery for avoiding tumor spreading. [less ▲]

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See detailSofosbuvir + simeprevir +/-ribavirin treatment is efficient in genotype 4 chronic hepatitis C patients: results of a large international cohort.
Moreno, C; Derbala, M; Nguyen-Khac, E et al

in Hepatology (Baltimore, Md.) (2016), 64(1), 1990

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See detailEnquêter sur les non-publics de la culture: quelle posture de recherche pour quel dispositif méthodologique?
Ghebaur, Cosmina ULg

in Questions de Communication (2016)

Mes travaux portent sur les non-publics de la culture et leur fabrication institutionnelle, à savoir leur production par les institutions chargées de mettre en œuvre sur un territoire donné les politiques ... [more ▼]

Mes travaux portent sur les non-publics de la culture et leur fabrication institutionnelle, à savoir leur production par les institutions chargées de mettre en œuvre sur un territoire donné les politiques culturelles les concernant. Pour explorer cette question, je me place dans la perspective initiée en sociologie de l'art par Pascale Ancel et Alain Pessin (2004) et caractérisée par la remise en question de la frontière entre publics et non-publics. On peut, écrit Martine Azam (2004), être " à la fois " public et non-public s'agissant de deux objets culturels différents ou du même objet à des moments différents. L'objectif de cet article est d'expliciter les principaux choix méthodologiques que j'ai été amenée à faire en enquêtant, avec cette posture de recherche, sur une exposition photographique en extérieur organisée dans une ville de la banlieue parisienne. [less ▲]

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See detailSclérostine & insuffisance rénale: que nous apprennent les différents méthodes de dosage?
PAQUOT, Francois ULg; BOUQUEGNEAU, Antoine ULg; CAVALIER, Etienne ULg et al

in Néphrologie & Thérapeutique (2016), 12(5), 374

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See detailIdentification and characterization of volatile organic compounds active against barley pathogens
De Clerck, Caroline ULg; Kaddes, Amine ULg; Fiers, Marie et al

in Bulletin OILB/SROP = IOBC/WPRS Bulletin (2016), 117

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See detailFramework for building integrated policies regarding forest risk management: Insights from Wallonia (Belgium)
Riguelle, Simon ULg

in Natural Resources and Bioeconomy Studies (2016), 41

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See detailAgeism among nurses in oncology
Schroyen, Sarah ULg; Missotten, Pierre ULg; Jerusalem, Guy ULg et al

in International Psychogeriatrics (2016)

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See detailPermutations and shifts
Charlier, Emilie ULg

in Lecture Notes in Computer Science (2016), 9840

The entropy of a symbolic dynamical system is usually defined in terms of the growth rate of the number of distinct allowed factors of length $n$. Bandt, Keller and Pompe showed that, for piecewise ... [more ▼]

The entropy of a symbolic dynamical system is usually defined in terms of the growth rate of the number of distinct allowed factors of length $n$. Bandt, Keller and Pompe showed that, for piecewise monotone interval maps, the entropy is also given by the number of permutations defined by consecutive elements in the trajectory of a point. This result is the starting point of several works of Elizalde where he investigates permutations in shift systems, notably in full shifts and in beta-shifts. The goal of this talk is to survey Elizalde's results. I will end by mentioning the case of negative beta-shifts, which has been simultaneously studied by Elizalde and Moore on the one hand, and by Steiner and myself on the other hand. [less ▲]

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See detailCircadian and homeostatic sleep pressure modulate fMRI correlates of vigilant attention
Muto, Vincenzo ULg; Jaspar, Mathieu ULg; Meyer, C et al

in Journal of Sleep Research (2016), 25(s1),

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See detailCharacteristics and frequency of large submarine landslides at the western tip of the Gulf of Corinth
Beckers, Arnaud; Hubert, Aurelia ULg; Beck, Christian et al

in Geophysical Research Abstracts (2016), 18

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See detailUrban infrastructure resilience to fire disaster: An overview
Gernay, Thomas ULg; Selamet, Serdar; Tondini, Nicola et al

in Procedia Engineering (2016), 161C

Fire disasters are a serious threat to the functionality of the built environment, in particular in densely populated urban areas where city infrastructure systems are under strain. Yet, fire safety ... [more ▼]

Fire disasters are a serious threat to the functionality of the built environment, in particular in densely populated urban areas where city infrastructure systems are under strain. Yet, fire safety issues are still mostly considered at the level of individual elements or buildings, disregarding the global risk for systems’ functionality. In line with the current efforts toward ensuring more resilient cities, this paper presents an overview of urban infrastructure resilience to fire disaster. The definitions of resilience and the quantitative frameworks established for other hazards such as earthquakes are reviewed. Then, the specificities of structural fire engineering are presented and it is shown how resilience frameworks could be applied to fire hazard. Finally, the paper identifies areas where further research efforts are needed. [less ▲]

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See detailGeomorphometric mapping of spatio-temporal changes in Plio-Quaternary uplift in the NW European Alpine foreland
Demoulin, Alain ULg; Bourdon, Hadrien

in Geophysical Research Abstracts (2016), 18

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See detailDo Burundians have a more positive perception of older people than immigrants or Belgians?
Marquet, Manon ULg; Missotten, Pierre ULg; Nindaba, Desiderate et al

in International Psychogeriatrics (2016), 27(Supplement 1), 70-172

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See detailOptical characterization of Sol-Gel ZnO:Al thin films
Ivanova, T; Harizanova, A; Koutzarova, T et al

in Journal of Physics: Conference Series (2016), 700

This paper presents a sol-gel technological process for preparing thin films of ZnO and ZnO:Al. The effect of annealing treatments (500, 600, 700 and 800 oC) on their properties was studied. The ... [more ▼]

This paper presents a sol-gel technological process for preparing thin films of ZnO and ZnO:Al. The effect of annealing treatments (500, 600, 700 and 800 oC) on their properties was studied. The structural evolution with the temperature was investigated by using X-Ray diffraction (XRD). Fourier Transform Infrared (FTIR) and UV-VIS spectrophotometry were applied to characterizing the films’ vibrational and optical properties. The ZnO and ZnO:Al films possessed a polycrystalline structure. The films studied are highly transparent in the visible spectral range. The optical band gap values and the haze parameter were also determined. [less ▲]

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See detailImplementation of the green payment within the scheme of the new Common Agricultural Policy (2015-2020): first results for 2015 in Wallonia (South of Belgium)
Burny, Philippe ULg; Terrones Gavira, François ULg

in Quality-Access to Success (2016), (Supplement), 10-14

At the end of 2013, a new Common Agricultural Policy was defined at the European level, including the implementation of the so-called “green payment”, which obliges farmers to respect three new conditions ... [more ▼]

At the end of 2013, a new Common Agricultural Policy was defined at the European level, including the implementation of the so-called “green payment”, which obliges farmers to respect three new conditions in order to get financial support through direct payments. The year 2015 being the first implementation year, the consequences on Walloon agriculture are examined. It appears that 50% of Walloon farmers are not obliged to practice crop diversification, while 16% are obliged to have at least two crops on their arable land and 33% are obliged to have at least three crops on their arable land. Less than 1% does not respect the new diversification rules. Concerning the obligation to have at least 5% of ecological focus area on the arable land, it appears that 54% of Walloon farmers are in conditions not to be obliged to respect the measure. When they implement the measure, the percentage of ecological focus areas in arable land reaches 6.9% as a mean and 2.4% do not reach the requested 5%. Finally, it can be said that the green payment does not represent a big constraint for Walloon farmers, though eventual economic consequences are still to be precised, while environmental benefits are strengthened. [less ▲]

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See detailEnglish translation and cross-cultural adaptation of the SARQOL Questionnaire
Beaudart, Charlotte ULg; Edwards, M.; Dennisson, E. et al

in Journal of Frailty & Aging (2016), 5(Supplement 1), 58

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See detailAntonymie et exhaustivité
Steffens, Marie ULg

in SHS Web of Conferences (2016), 27

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See detailInvestigation of sol-gel yttrium doped ZnO thin films: structural and optical properties
Ivanova, T; Harizanova, A; Koutzarova, T et al

in Journal of Physics: Conference Series (2016)

Nanostructured metal oxide films are extensively studied due to their numerous applications such as optoelectronic devices, sensors. In this work, we report the Y–Zn–O nanostructured films prepared by sol ... [more ▼]

Nanostructured metal oxide films are extensively studied due to their numerous applications such as optoelectronic devices, sensors. In this work, we report the Y–Zn–O nanostructured films prepared by sol-gel technology from sols with different concentration of yttrium precursor, followed by post-annealing treatment. The Y doped ZnO thin films have been deposited on Si and quartz substrates by spin coating method, then treated at températures ranging from 300-800°C. XRD analysis reveals modification of the film structure and phases in the doped ZnO films. [less ▲]

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See detailEnd-to-end continuous manufacturing
Monbaliu, Jean-Christophe ULg

in ChemistryViews (2016)

We will discuss the development and implementation of continuous-flow multistep strategies for the synthesis of high-value added organic targets. Selected examples include unusual reaction conditions such ... [more ▼]

We will discuss the development and implementation of continuous-flow multistep strategies for the synthesis of high-value added organic targets. Selected examples include unusual reaction conditions such as working with solids in microreactors, high temperature reactions and the handling of highly reactive species. [less ▲]

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See detailInfluence of crossed fields in structures combining large grain, bulk (RE)BCO superconductors and soft ferromagnetic discs
Philippe, Matthieu ULg; Fagnard, Jean-François ULg; Wera, Laurent ULg et al

in Journal of Physics: Conference Series (2016), 695

Bulk (RE)BCO superconductors are able to trap record magnetic fields and can be used as powerful permanent magnets in various engineering applications such as rotating machines and magnetic bearings. When ... [more ▼]

Bulk (RE)BCO superconductors are able to trap record magnetic fields and can be used as powerful permanent magnets in various engineering applications such as rotating machines and magnetic bearings. When such superconducting (SC) “trapped field magnets” are combined to a ferromagnetic (FM) disc, the total magnetic moment is increased with respect to that of the superconductor alone. In the present work, we study experimentally the magnetic behaviour of such hybrid FM/SC structures when they are subjected to cycles of applied field that are orthogonal to their permanent magnetization, i.e. a “crossed-field” configuration. Experimental results show that the usual “crossed-field demagnetization” caused by the cycles of transverse field is strongly reduced in the presence of the ferromagnet. [less ▲]

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See detailPhage therapy against antimicrobial resistance, design of the first clinical study Phagoburn.
Jault, Patrick; Gabard, Jérôme; Leclerc, Thomas et al

in Critical Care (2016), 20(Suppl 2), 109

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See detailDo the elderly feel older after exposure to negative aging stereotypes?
Marquet, Manon ULg; Missotten, Pierre ULg; Adam, Stéphane ULg

in International Psychogeriatrics (2016), 27(Supplement 1), 70-172

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See detailAssociation between vertebral heart score measurement and overweight condition in dogs
François, Marion; Merveille, Anne-Christine ULg; Mc Entee, Kathleen ULg et al

in Veterinary Radiology & Ultrasound (2016)

Introduction Vertebral heart score (VHS) is used to assess heart size on thoracic radiographs. Association between VHS and overweight condition in dogs of different breeds is still unknown. The aim of ... [more ▼]

Introduction Vertebral heart score (VHS) is used to assess heart size on thoracic radiographs. Association between VHS and overweight condition in dogs of different breeds is still unknown. The aim of this study is to determine if VHS is influenced by overweight condition in dogs. The hypothesis is that VHS is influenced by BCS and T4 ratio. Methods Recruitment criteria for this retrospective study were the presence of a minimum of 2 thoracic radiographic views and a diagnosis of “normal echocardiographic examination” in medical records from 2013 to 2016. Body weight, BCS and breed were extracted. VHS and overweight condition were calculated. Dogs from breeds with a normal maximal VHS < 11 (group 1) and from breeds with a normal maximal VHS > 11 (group 2) were separated. Statistical analyses were performed using XLStat® software. Results Fifty-one dogs were included in the study. Body weight ranged from 3.7 to 44.8 kg and was not recorded in 2 dogs. These dogs were not excluded because of the BCS was recorded for these dogs. BCS ranged from 3 to 9. Thirteen dogs had a VHS value superior to the normal range and all of them had BCS ≥ 4. A weak positive correlation was found between BCS and T4 ratio (P ≤ 0.001, R2=0.4). There was a positive relationship between BCS and VHS (ANCOVA, P ≤ 0.003) for each group and between T4 ratio and VHS for each group (ANCOVA, P ≤ 0.001). Discussion/Conclusions This study confirms that the T4 ratio is correlated to BCS evaluated clinically. This ratio could be used to assess overweight condition on thoracic radiographs. VHS is influenced by BCS and the T4 ratio; therefore, VHS should be use with caution in overweighed dogs. [less ▲]

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See detailImpact of Age and Treatment Group in Childhood High Hyperdiploid Low Risk B-Cell Acute Lymphoblastic Leukemia (ALL): Results of the CLG-EORTC 58951 Study
Clement, Laura; Suciu, Stefan; Luquet, Isabelle et al

in Blood (2016)

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See detailIncidence of bone fractures after critical illness
ROUSSEAU, Anne-Françoise ULg; Michel, Laure ULg; Bawin, Maxime ULg et al

in Intensive Care Medicine Experimental (2016), 4(Suppl 1), 1131

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See detailCalibration of MATSim in the context of natural hazards in Liège (Belgium): Preliminary results
Saadi, Ismaïl ULg; El Saeid Mustafa, Ahmed Mohamed ULg; Teller, Jacques ULg et al

in Proceedings of the 12th Conference on Transport Engineering (2016)

In Belgium, river floods are among the most frequent natural disasters and they may cause important changes on travel demand. In this regard, we propose to set up a large scale scenario using MATSim for ... [more ▼]

In Belgium, river floods are among the most frequent natural disasters and they may cause important changes on travel demand. In this regard, we propose to set up a large scale scenario using MATSim for guarantying an accurate assessment of the river floods impact on the transportation systems. In terms of inputs, agent-based models require a base year population. In this context, a synthetic population with a respective set of attributes is generated as a key input. Afterwards, agents are assigned activity chains through an activity-based generation process. Finally, the synthetic population and the transportation network are integrated into the dynamic traffic assignment simulator, i.e. MATSim. With respect to data, households travel surveys are the main inputs for synthesizing the populations. Besides, a steady-state inundation map is integrated within MATSim for simulating river floods. To our knowledge, very few studies have focused on how river floods affect transportation systems. In this regard, this research will undoubtedly provide new insights in term of methodology and traffic pattern analysis under disruptions, especially with regard to spatial scale effects. The results indicate that at the municipality level, it is possible to capture the effects of disruptions on travel behavior. In this context, further disaggregation is needed in future studies for identifying to what extent results are sensitive to disaggregation. In addition, results also suggest that the target sub-population exposed to flood risk should be isolated from the rest of the travel demand to reach have more sensitive effects. [less ▲]

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See detailPurpura thrombocytopénique idiopathique...idiopathique, vraiment?
LONGTON, Julie ULg; DRESSE, Marie-Françoise ULg; Florkin, Benoît et al

in Tijdschrift van de Belgische Kinderarts = Journal du Pédiatre Belge (2016), 18(1), 112

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See detailRole of inflammatory- and growth factors in the pathophysiology of gestational diabetes-related complications in neonates
Guffins, Amandine; FARHAT, Nesrine ULg; GKIOUGKI, Evangelia ULg et al

in Belgian Journal of Paediatrics (2016), 18(1), 82

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See detailTechnical diversity within the tanged-tool Gravettian: new results from Belgium
Touzé, Olivier ULg; Flas, Damien; Pesesse, Damien

in Quaternary International (2016), http://dx.doi.org/10.1016/j.quaint.2015.11.034

Located at the interface between the Paris and the Rhine Basins and the more northern territories of Europe, Belgium contains several Gravettian occupations, both open-air and in caves. The available ... [more ▼]

Located at the interface between the Paris and the Rhine Basins and the more northern territories of Europe, Belgium contains several Gravettian occupations, both open-air and in caves. The available documentation is unfortunately limited by the earliness of the excavations conducted at most sites. Stratified records in karstic context, primarily excavated in the 19th century, are particularly affected by this situation. The analysis of Gravettian lithic technological behaviours can, however, rely on two open air sites excavated in the late 20th century which provide more rigorous data: Maisières-Canal and Station de l'Hermitage. These two sites have been the focus of comparisons that highlight their similarities, both in terms of the lithic industry and location. In fact, the former stands out for the presence of tanged tools, a typological marker which is usually associated with the Early Gravettian of Western Europe. In this article, we present a new study that evidences the differences in the lithic technical systems represented at these sites. After a presentation of the most recent data, we consider the causes that may be responsible for such diversity, highlighting the possible role of the chronological factor, but also of the existence of an original technical tradition in north-western Europe during the appearance and development of the Gravettian. [less ▲]

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See detailPrevalence of vasculare risk factors in different stages of prodromal Alzheimer’s disease and its influence on cognitive decline
Bos, I.; Vos, S.; Frölich, L. et al

in Alzheimer's & Dementia : The Journal of the Alzheimer's Association (2016), 12(7), 1059-1061

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See detailPrevalence of frailty among nursing home, according to different operational definitions
Buckinx, Fanny ULg; Reginster, Jean-Yves ULg; GILLAIN, Sophie ULg et al

in Journal of Frailty & Aging (2016), 5(Supplement 1), 69

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See detailAntonymic co-presence: overview of the syntactic patterns model
Steffens, Marie ULg

in Studies van de BKL - Travaux du CBL - Papers of the LSB (2016), 10

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See detailTrace metals in soft tissue of marine bivalve Noah's ark (Arca noao) from Bizerte lagoon (Northern Tunisia)
Ghribi, Feriel; Richir, Jonathan ULg; Boussafa, D et al

in Rapport de la Commission internationale pour l'exploration scientifique de la Mer Méditerranée (2016), 41

This study aimed to monitor the bioaccumulation of 5 trace elements (TEs: Zn, Fe, Cu, Cd, and Pb) in the soft tissue of the Ark shell (Arca noae), seasonally sampled in Bizerte lagoon, northern Tunisia ... [more ▼]

This study aimed to monitor the bioaccumulation of 5 trace elements (TEs: Zn, Fe, Cu, Cd, and Pb) in the soft tissue of the Ark shell (Arca noae), seasonally sampled in Bizerte lagoon, northern Tunisia, in order to assess the nutritional quality of this bivalve and to promote its consumption as marine resource in Tunisia. The levels of all trace metals analyzed in Arca noae are below maximum admissible level which makes this species a healthy and safe food for human consumption. [less ▲]

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See detailPleading for a new DCB in the historical German deep facies of Sauerland near Stockum
Streel, Maurice ULg; Korn, Dieter

in Subcommission on Devonian Stratigraphy Newsletter (2016), 31

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See detailUpdating the correlation Miospores/Conodonts in upper and uppermost Famennian
Streel, Maurice ULg

in IUGS, Subcommisson Devonian Strata Newsletter (2016), 31

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See detailBrain-derived neurotrophic factor (BDNF) in normal healthy and hemodialyzed populations
CAVALIER, Etienne ULg; Carlisi, A.S.; WATAR, Florence ULg et al

in Journal of Frailty & Aging (2016), 5(Supplement 1), 116

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See detailadministration of Third-Party Mesenchymal Stromal Cells at the Time of Kidney Transplantation: Interim Safety Analysis at One-Year Follow-Up
WEEKERS, Laurent ULg; Erpicum, Pauline ULg; DETRY, Olivier ULg et al

in Transplant International (2016), 29(Suppl 2), 13-6

Objective. Mesenchymal stromal cells (MSC) therapy has been suggested in kidney transplantation (KTx). We report on the 1-year follow-up of an open-label phase I trial using MSC at the time of KTx ... [more ▼]

Objective. Mesenchymal stromal cells (MSC) therapy has been suggested in kidney transplantation (KTx). We report on the 1-year follow-up of an open-label phase I trial using MSC at the time of KTx. Methods. On postoperative day 3 (D3), third-party MSC (~2.0x106/kg) were administered to 7 non-immunized first-transplant recipients from deceased donors, under standard immunosuppression (Basiliximab, Tacrolimus, MMF and steroids). No HLA matching was required for MSC donors. In parallel, 7 comparable KTx recipients were included as controls. Written informed consent was obtained from all participants. Results. No hemodynamic or immune-allergic side-effect was noted at the time of MSC injection. Still, 1 patient with a history of ischemic heart disease had a NSTEMI ~3h after MSC infusion. Four MSC patients presented with CMV reactivation within 165 ± 96 days post KTx, whereas 3 controls had positive polyoma-BK viremia within 92 ± 4d post KTx. Three MSC patients were affected by pneumonia within 269 ± 98d post KTx, whereas 3 controls had urinary infection within 48 ± 43d post KTx. No MSC engraftment syndrome was observed. At D14, eGFR in MSC and control groups was 47.1 ± 6.8 and 39.7 ± 5.9 ml/min, respectively (p, 0.05). At 1 year, eGFR in MSC and control groups was 43.1 ± 17.8 and 53.9 ± 13.4 ml/min, respectively (p, 0.25). At 3-month protocol biopsy, no rejection was evidenced in MSC or control patients. Later on, 1 acute rejection was diagnosed at D330 in 1 MSC patient. No biopsy-proven AR was noted in controls. Three patients developed anti-HLA antibodies against MSC (n=1) or shared kidney/MSC (n=2) mismatches. Conclusions. MSC infusion was safe in all patients except one. Incidence of opportunist and non-opportunist infections was similar in both MSC and control groups. No MSC engraftment syndrome was documented. No difference in eGFR was found at 1 year post KTx. Putative immunization against MSC was observed in 3 patients. [less ▲]

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See detailHistoire et expérience fondatrice dans Sein und Zeit
Zincq, Aurélien ULg

in Bulletin d'Analyse Phénoménologique (2016)

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See detailStudy of the Potential Zoonotic Transmission of Clostridium difficile in Belgian Cattle Farms.
Rodriguez Diaz, Cristina ULg; Hakimi, Djalal-Eddine; Daube, Georges ULg et al

in Journal of Food Protection (2016), 79(supplement A),

Introduction: Zoonoses are infectious that can be transmitted between animals and humans through direct contact, close proximity or the environment. Since domestic and food animals frequently test ... [more ▼]

Introduction: Zoonoses are infectious that can be transmitted between animals and humans through direct contact, close proximity or the environment. Since domestic and food animals frequently test positive for the bacterium, it seems plausible that C. difficile could be zoonotic. A former study showed that the prevalence in veal calf aged less than 6 months was 22% while in adult cattle population, it was 6,9 %. Purpose: This study aimed to determine the prevalence and the epidemiology of C. difficile in cattle farms and the possible spread of the bacterium among animals and farmers. Methods: A total of 176 faecal samples of cattle were collected from 5 different Belgian farms (south East Belgium), from November 2015 to February 2016. A stool sample of each farmer was also requested. Detection of C. difficile was performed by classical culture on C. difficile selective medium (cycloserine cefoxitin fructose cholate). Isolates were characterised by PCR-ribotyping and Genotype Cdiff test (Hain Lifescience), which allows the detection of all toxin genes, mutations in gyrA gene and the deletion in the regulator gene tcdC. Toxic activity was confirmed by a cytotoxic assay on MRC-5 cells. Results: C. difficile was detected in 14/178 (7.9%) animal samples. Isolates were grouped into five different types, including PCR-ribotype 015 (this ribotype is one the most encountered in hospitals in Belgium). The other types were UCL46A, UCL24*, UCL24, UCL33. All of them were identified as toxigenic by cytotoxicity assay and toxin genes profile. In contrast, none of the 5 farmers studied were positive for the bacterium. Significance: Results obtained indicate that PCR-ribotypes commonly isolated from hospitalised patients are also present in cattle, indicating an animal reservoir. However, a zoonotic transmission could be not demonstrated in this preliminary study. [less ▲]

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See detailPrevalence of concomitant bone and muscle wasting in patients from the SarcoPhAge Study
Locquet, Médéa ULg; Beaudart, Charlotte ULg; Reginster, Jean-Yves ULg et al

in Journal of Frailty & Aging (2016), 5(Supplement 1), 84

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See detailPhysical and muscle performances among elderly nursing home residents. Results fo the senior cohort
Buckinx, Fanny ULg; Reginster, Jean-Yves ULg; CROISIER, Jean-Louis ULg et al

in Journal of Frailty & Aging (2016), 5(Supplement 1), 69

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See detail'En fonction du futur': la fonction publique régionale wallonne sous contrainte d'innovation
Claisse, Frédéric ULg; Guyot, Jean-Luc

in Prospective et Stratégie (2016), 1(7), 39-58

Building on a forward-looking reflexion initiated at the Walloon Institute for Evaluation, Foresight and Statistics (IWEPS), the paper considers the issues at stake for the transformation of the regional ... [more ▼]

Building on a forward-looking reflexion initiated at the Walloon Institute for Evaluation, Foresight and Statistics (IWEPS), the paper considers the issues at stake for the transformation of the regional Walloon public administration, taken as a changing environment under strong pressures – institutional, budgetary, demographic, economic and ideological –. In another perspective, these multiple constraints can also be seen as opportunities to innovate and to think about the public administration identity, modes of organisation and ways of performing its missions : how is the profession of civil servant going to be redefined, at a time when the proportion of contract employees vs. public servants has never been so high? What management practices can the administration draw inspiration from, as New Public Management (NPM) principles are showing some signs of exhaustion? What changes can be observed in the users’ expectations towards the administration? What role will instruments of digital governance play in this new configuration? How will the public administration react to the competition of new providers of services to the public? [less ▲]

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See detailA Brief History of MPLS Usage in IPv6
Vanaubel, Yves ULg; Mérindol, Pascal; Pansiot, Jean-Jacques et al

in Lecture Notes in Computer Science (2016)

Recent researches have stated the fast deployment of IPv6. It has been demonstrated that IPv6 grows much faster, being so more and more adopted by both Internet service providers but also by servers and ... [more ▼]

Recent researches have stated the fast deployment of IPv6. It has been demonstrated that IPv6 grows much faster, being so more and more adopted by both Internet service providers but also by servers and end-hosts. In parallel, researches have been conducted to discover and assess the usage of MPLS tunnels. Indeed, recent developments in the ICMP protocol make certain categories of MPLS tunnels transparent to traceroute probing. However, these studies focus only on IPv4, where MPLS is strongly deployed. In this paper, we provide a first look at how MPLS is used under IPv6 networks using traceroute data collected by CAIDA. At first glance, we observe that the MPLS deployment and usage seem to greatly differ between IPv4 and IPv6, in particular in the way MPLS label stacks are used. While label stacks with at least two labels are marginal in IPv4 (and mostly correspond to a VPN usage), they are prevalent in IPv6. After a deeper analysis of the label stack typical content in IPv6, we show that such tunnels result from the use of 6PE. This is not really surprising since this mechanism was specifically designed to forward IPv6 traffic using MPLS tunnels through networks that are not fully IPv6 compliant. However, we show that it does not result from non dual-stack routers but rather from the absence of native IPv6 MPLS signaling protocols. Finally, we investigate a large Tier-1 network, Cogent, that stands out with an original set-up. [less ▲]

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See detailExergy analysis applied to performance of buildings in Europe
Sartor, Kevin ULg; Dewallef, Pierre ULg

in Proceedings (2016)

Energy performance of buildings generally assesses the energy consumption of buildings such as heating, domestic heat water, ventilation systems... However, this approach is based on the first law of ... [more ▼]

Energy performance of buildings generally assesses the energy consumption of buildings such as heating, domestic heat water, ventilation systems... However, this approach is based on the first law of thermodynamics and considers only the quantity of energy used without considering its “quality” and leads to a lack of information about the energy conversion processes. This is particularly true in the new low-energy buildings where sometimes high temperatures sources are used to meet low-temperature needs. The exergy analysis of a system, based on first and second thermodynamic laws, can be used to overcome this. In this work, it is proposed to compare the energy and the exergy consumption of several kinds of buildings to determine the best systems in terms of energy and exergy needs. The energy demand calculations are performed using the official software available in Belgium and some assumptions are implemented to consider the exergy approach. As exergy calculations require a reference state, some different climatic conditions are also investigated. Finally, some conclusions are discussed to rank the sources of energy and their related exergy losses. [less ▲]

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See detailPharmacokinetic (PK) effects and safety of olaparib in combination with tamoxifen, anastrozole or letrozole : Phase I study
Plummer, R.; Verheul, H.M.; Langenberg, M. et al

in Journal of Clinical Oncology (2016), 34

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See detailPulsations in hot subdwarf stars: recent advances and prospects for testing stellar physics
Charpinet, Stéphane; Van Grootel, Valérie ULg; Fontaine, G. et al

in Proceedings of the International Astronomical Union (2016), 29

The evolved, core helium burning, extreme horizontal branch stars (also known as hot B subdwarfs) host several classes of pulsators showing either p- or g-modes, or both. They offer particularly favorable ... [more ▼]

The evolved, core helium burning, extreme horizontal branch stars (also known as hot B subdwarfs) host several classes of pulsators showing either p- or g-modes, or both. They offer particularly favorable conditions for probing with asteroseismology their internal structure, thus constituting arguably the most interesting seismic window for this intermediate stage of stellar evolution. G-modes in particular have the power to probe deep inside these stars, down to the convective He-burning core boundary where uncertain physics (convection, overshooting, semi-convection) is at work. Space data recently obtained with CoRoT and Kepler are offering us the possibility to probe these regions in detail and possibly shed new light on how these processes shape the core structure. In this short paper, we present the most recent advances that have taken place in this field and we provide hints of the foreseen future achievements of hot subdwarf asteroseismology. [less ▲]

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See detailImpact of biomarkers on diagnostic confidence in clinical assessment of patients with suspected Alzheimer’s disease and high diagnostic uncertainty: An EADC study
Bosco, P.; Redolfi, A.; Bocchetta, M. et al

in Alzheimer's & Dementia : The Journal of the Alzheimer's Association (2016), 12(7), 904-905

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See detailA no-go theorem for the dark matter interpretation of the positron anomaly
Laletin, Maxim ULg

in Frascati Physics Series (2016), LXIII

The overabundance of high-energy cosmic positrons, observed by PAMELA and AMS-02, can be considered as the consequence of dark matter decays or annihilations. We show that recent FERMI/LAT measurements of ... [more ▼]

The overabundance of high-energy cosmic positrons, observed by PAMELA and AMS-02, can be considered as the consequence of dark matter decays or annihilations. We show that recent FERMI/LAT measurements of the isotropic diffuse gamma-ray background impose severe constraints on dark matter explanations and make them practically inconsistent. [less ▲]

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See detailPsychometric properties of the Questionnaire of Executive Self-Awareness (QESA) for Children
Geurten, Marie ULg; Catale, Corinne ULg; Geurten, Claire ULg et al

in Journal of the International Neuropsychological Society (2016)

Objective: People with accurate representations of their own cognitive functioning (i.e., cognitive self-awareness) tend to use appropriate strategies to regulate their behavior. Due to the lack of ... [more ▼]

Objective: People with accurate representations of their own cognitive functioning (i.e., cognitive self-awareness) tend to use appropriate strategies to regulate their behavior. Due to the lack of appropriate instruments, few studies have examined the development of this ability among children. Method: This study tested the measurement properties of the self-rating and other-rating forms of the Questionnaire of Executive Self-Awareness (QESA), designed to tap children’s knowledge of their executive functioning. Participants were 317 children aged 7 to 14 years old. Results: Confirmatory factor analyses carried out on the QESA confirmed the eight-factor structure of both versions. There were significant correlations between the QESA and the parent versions of the BRIEF, DEX-C, and CHEXI. Both forms of the QESA were able to distinguish between children who had sustained a traumatic brain injury (TBI) and control participants. A self-other discrepancy score was computed to assess children’s executive self-awareness. A statistical difference was observed between the TBI and control groups on this score, suggesting that TBI may trigger self-awareness impairments in children. Conclusion: The good psychometric properties of the two forms of the QESA were established. Furthermore, results of the analyses carried on the different discrepancy scores seem to indicate that the QESA could help clinicians to detect patients with self-awareness deficits. [less ▲]

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See detailVolumetric brain MRI measurements in a retrospective Belgian multi-centr MRI biomarker study in dementia - REMEMBER
Niemantsverdriet; Smeets, D.; Bastin, Christine ULg et al

in Acta Neurologica Belgica (2016)

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See detailThe effect of napping on the consolidation of explicit and implicit information
van Schalkwijk, F J; Heib, D P J; Hoedlmoser, K et al

in Journal of Sleep Research (2016), 25(s1),

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See detailThe impact of factors related to retirement on cognitive functioning
Grotz, Catherine ULg; Adam, Stéphane ULg; Matharan, Fanny et al

in International Psychogeriatrics (2016), 27(supplement S1), 45-69

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See detailRandomized, Double-Blinded, Controlled Clinical Trial Evaluating the Efficacy of a Diet Supplemented with Curcuminoids Extract, Hydrolysed Collagen and Green Tea Extract in Dogs with Osteoarthritis
Barthélémy, Nicolas; Comblain, Fanny ULg; Lesponne, Isabelle et al

in Veterinary and Comparative Orthopaedics and Traumatology (2016)

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See detailAn Effective Approach for the Control of Uncertain Systems
Wanichanon, Thanapat; Cho, Hancheol ULg; Udwadia, Firdaus

in ABCM International Congress of Mechanical Engineering (2015, December)

This paper develops a new methodology for robust control of uncertain nonlinear systems. Two different controllers are developed and combined to accurately satisfy control requirements in the presence of ... [more ▼]

This paper develops a new methodology for robust control of uncertain nonlinear systems. Two different controllers are developed and combined to accurately satisfy control requirements in the presence of (a) system uncertainties in our knowledge of the exact physical system, and (b) uncertainties in the given forces acting on the system. The methodology is developed in two steps. First, a controller is designed for the nominal system, which is our best assessment of the actual physical system, and no uncertainties are considered at this step. This controller is realized using a recent finding in the field of analytical dynamics. The control requirements are recast as constraints on the dynamical system, and use of the analytical dynamics result enables us to find the required generalized forces to exactly satisfy the control requirements while simultaneously minimizing a control cost. The discrepancies caused by ignoring the uncertainties are next compensated for by adding a second controller that is obtained by generalizing the concept of sliding mode control. Unlike conventional sliding mode controllers, this additive controller does not suffer from a chattering problem; it also leads to much smaller errors, and faster response. In addition, it allows many different forms of control functions to be used, depending on practical considerations of implementation. A numerical example of a three-degree-of-freedom pendulum is simulated to demonstrate the control strategy developed herein, in which there are uncertainties both in the description of the physical system’s parameters and in the description of the gravity field acting on the pendulum. The example illustrates the accuracy, efficiency, and ease of implementation of the new control methodology. [less ▲]

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See detailQualités métrologiques de la version courte du Neurophysiology of Pain Questionnaire
Demoulin, Christophe ULg; Brasseur, P.; Roussel, N. et al

in Revue du Rhumatisme (2015, December), 82S

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See detailCroyances de la population générale au sujet des manipulations vertébrales
Demoulin, Christophe ULg; Baeri, D.; TOUSSAINT, Geoffrey ULg et al

in Revue du Rhumatisme (2015, December), 82S

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See detailSpiral Arms in the Disk of HD 142527
Christiaens, Valentin ULg; Casassus, Simon; Pérez, Sebastian et al

in Astronomical Society of the Pacific Conference Series (2015, December), 499

In view of its large gap, previously reported asymmetries and near-infrared (NIR) spiral arms, the transition disk of the Herbig Fe star HD 142527 constitutes a remarkable case study. Based on our ALMA ... [more ▼]

In view of its large gap, previously reported asymmetries and near-infrared (NIR) spiral arms, the transition disk of the Herbig Fe star HD 142527 constitutes a remarkable case study. Based on our ALMA observations of the disk and previous NIR images, we try to infer the origin of the observed spirals. Different scenarios, including the effect of the binary companion, unseen planets, disk self-gravity and tidal interaction by a stellar encounter, are discussed in order to constrain the origin of the spirals. We conclude that at least a combination of two of the considered scenarios are required to account for the large annular gap, the NIR spirals and all three CO spirals. [less ▲]

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See detailEvaluation of simplified flexibility evaluation tools using a unit commitment model
Quoilin, Sylvain ULg; Nijs, Wouter; Hidalgo, Ignacio et al

in IEEE Digital Library (2015, December)

Different tools and methods have been proposed in the literature to assess the required flexibility resources and needs in a particular grid or geographical area. However, few of them are readily usable ... [more ▼]

Different tools and methods have been proposed in the literature to assess the required flexibility resources and needs in a particular grid or geographical area. However, few of them are readily usable in long term energy planning models because they require small time steps and detailed data. In this paper, two candidate methods to address the flexibility issues in such models are evaluated. A unit commitment model developed at the JRC, DispaSET 2.0, is used as a test case for the different simplified flexibility assessment tools. The modelled geographical area is Belgium, using historical data for the demand and VRE curves and their day-ahead forecast. Different VRE penetration scenarios are simulated to evaluate the flexibility of the power system. The simplified assessment tools are then run with the same inputs. Results indicate significant discrepancies between the detailed Unit Commitment model and the simplified tools. The underlying reasons are described and suggestions are formulated to improve their accuracy. [less ▲]

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See detailWho are my Visitors and Where do They Come From? An Analysis Based on Foursquare Check-ins and Place-based Semantics.
Hallot, Pierre ULg; Stewart, Kathleen; Billen, Roland ULg

in Eurographics Workshop on Urban Data Modelling and Visualisation 2015 (2015, November 23)

Activity recommendation systems aims at providing relevant information depending on targeted users' groups. For instance in a city, it makes sense to differentiate local residents from tourists. This ... [more ▼]

Activity recommendation systems aims at providing relevant information depending on targeted users' groups. For instance in a city, it makes sense to differentiate local residents from tourists. This research investigates to what extent the anonymized data collected from social networks can be used as a basis for making activity recommendations associated with local residents versus tourists when visiting a public place, such as a museum or gallery. Using rules based on the spatial, temporal and semantics of visited places, we are able to infer if a user is likely to be local or a tourist, based on anonymous sample Foursquare data and place-based semantics retrieved using Google Places API. Using semantics of visited places, it becomes possible to infer additional information about a user based on their movements over space and time. Depending on the kind and frequency of visited places, inferences about the aim of a visit to a location are possible. This analysis could provide information to users in the form of recommendations based on their movements while travelling around an area. This study has been performed using Foursquare check-ins for visitors to the Art Institute of Chicago between March 2010 and January 2011. [less ▲]

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See detailOutgassing and chemical evolution of C/2012 S1 (ISON)
Dello Russo, Neil; Vervack, Ronald J.; Kawakita, Hideyo et al

in Bulletin of the American Astronomical Society (2015, November 01), 47

Volatile production rates, relative abundances, rotational temperatures, and spatial distributions in the coma were measured in C/2012 S1 (ISON) using long-slit high-dispersion (λ/Δλ ~ 25,000) infrared ... [more ▼]

Volatile production rates, relative abundances, rotational temperatures, and spatial distributions in the coma were measured in C/2012 S1 (ISON) using long-slit high-dispersion (λ/Δλ ~ 25,000) infrared spectroscopy as part of a worldwide observing campaign. Spectra were obtained on UT 2013 October 26 and 28 with NIRSPEC at the W. M. Keck Observatory, and UT 2013 November 19 and 20 with CSHELL at the NASA IRTF. H[SUB]2[/SUB]O was detected on all dates, with production rates increasing by about a factor of 40 between October 26 (R[SUB]h[/SUB] = 1.12 AU) and November 20 (R[SUB]h[/SUB] = 0.43 AU). Short-term variability of H[SUB]2[/SUB]O was also seen as the production rate increased by nearly a factor of two during observations obtained over a period of about six hours on November 19. C[SUB]2[/SUB]H[SUB]6[/SUB], CH[SUB]3[/SUB]OH and CH[SUB]4[/SUB] abundances were slightly depleted relative to H[SUB]2[/SUB]O in ISON compared to mean values for comets measured at infrared wavelengths. On the November dates, C[SUB]2[/SUB]H[SUB]2[/SUB], HCN and OCS abundances relative to H[SUB]2[/SUB]O appear to be close to the range of mean values, whereas H[SUB]2[/SUB]CO and NH[SUB]3[/SUB] were significantly enhanced. We will compare derived chemical abundances in ISON to other comets measured with infrared spectroscopy. [less ▲]

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See detailNitrogen Isotopic Ratios in Cometary NH2: Implication for 15N-fractionation in Ammonia
Shinnaka, Yoshiharu; Kawakita, Hideyo; Jehin, Emmanuel ULg et al

in Bulletin of the American Astronomical Society (2015, November 01), 47

Isotopic ratios in cometary molecules are diagnostic for the physico-chemical conditions where molecules formed and are processed, from the interstellar medium to the solar nebula. Usually temperatures at ... [more ▼]

Isotopic ratios in cometary molecules are diagnostic for the physico-chemical conditions where molecules formed and are processed, from the interstellar medium to the solar nebula. Usually temperatures at the molecular formation control the fractionation of the heavier element in molecular species, e.g., D-fractionation in water.In cometary volatiles, the [SUP]14[/SUP]N/[SUP]15[/SUP]N ratios in CN have been well observed (Manfroid et al. 2009, A&A, 503, 613, and reference therein) and is consistent with the ratio in HCN (a most probable parent of CN) measured in few comets (Bockelée-Morvan et al. 2008, ApJ, 679, L49). Those ratios are enriched compared to the proto-solar value by a factor of ~3. In contrast to those Nitriles, there are only few reports on [SUP]14[/SUP]N/[SUP]15[/SUP]N ratios in Ammonia (as Amine) (Rousselot et al. 2014, ApJ, 780, L17; Shinnaka et al. 2014, ApJ, 782, L16). Ammonia (NH[SUB]3[/SUB]) is usually the most abundant and HCN is the second most abundant N-bearing volatiles in cometary ice. Especially, recent observations of [SUP]15[/SUP]NH[SUB]2[/SUB] revealed the [SUP]14[/SUP]N/[SUP]15[/SUP]N ratios in NH[SUB]3[/SUB] are comparable to those of CN. However, from the viewpoint of theoretical work, the enrichment of [SUP]15[/SUP]N in cometary NH[SUB]3[/SUB] cannot be reproduced by current chemical network models. Information about the diversity of the [SUP]14[/SUP]N/[SUP]15[/SUP]N ratios in NH[SUB]3[/SUB] of individual comets is needed to understand the formation mechanisms/environments of NH[SUB]3[/SUB] in the early solar system.To clarify the diversity of the [SUP]14[/SUP]N/[SUP]15[/SUP]N ratios in cometary NH[SUB]3[/SUB], we determine the [SUP]14[/SUP]N/[SUP]15[/SUP]N ratios in NH[SUB]3[/SUB] for more than ten comets individually which include not only Oort cloud comets but also short period comets by using the high-resolution optical spectra of NH[SUB]2[/SUB]. These spectra were obtained with both the UVES mounted on the VLT in Chile and the HDS on the Subaru Telescope in Hawaii.The derived [SUP]14[/SUP]N/[SUP]15[/SUP]N ratios in NH[SUB]3[/SUB] for more than ten comets show high [SUP]15[/SUP]N-enrichment compared with the elemental abundances of nitrogen in the Sun by about factor of ~3 and has no large diversity depending on these dynamical properties. We discuss about the origin of the formation conditions of cometary NH[SUB]3[/SUB] and its physico-chemical evolution in the solar nebula based on our and other results.This work was supported by JSPS, 15J10864 (Y. Shinnaka). [less ▲]

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See detailPluto's atmosphere from stellar occultations in 2012 and 2013
Dias-Oliveira, Alex; Sicardy, Bruno; Lellouch, Emmanuel et al

in Bulletin of the American Astronomical Society (2015, November 01), 47

We present results from two Pluto stellar occultations observed on 18 July 2012 and 04 May 2013, and monitored respectively from five and six sites in South America. Both campaigns involved large ... [more ▼]

We present results from two Pluto stellar occultations observed on 18 July 2012 and 04 May 2013, and monitored respectively from five and six sites in South America. Both campaigns involved large telescopes (including the 8.2-m VLT at ESO/Paranal). The high SNR ratios and multi-chord coverage provide amoung the best Pluto atmospheric profiles ever obtained from the ground.We show that a spherically symmetric, clear (no-haze) and pure N2 atmosphere with a unique temperature profile satisfactorily fits the twelve lightcurves provided by the two events. We find, however, a small but significant increase of pressure of 6% (6-sigma level) between the two dates, with values of 2.16 ± 0.2 and 2.30 ± 0.01 μbar at the reference radius 1275 km, respectively.We provide atmospheric constrains between 1190 km and 1450 km from Pluto's center, and we determine the temperature profile with accuracy of a few km in vertical scale. Our model shows a stratosphere with strong positive gradient between 1190 km (at 36 K, 11 μbar) and r =1215 km (6.0 μbar), where a temperature maximum of 110 K is reached. Above it is a mesosphere with negative thermal gradient of -0.2 K/km up to 1,390 km (0.25 μbar), at which point, the mesosphere connects itself to a more isothermal upper branch at 81 K. This profile provides (assuming no troposphere) a Pluto surface radius of 1190 ± 5 km, consistent with preliminary values obtained by New Horizons. Currently measured CO abundances are too low to explain the negative mesospheric thermal gradient. We explore the possibility of an HCN (recently detected by ALMA) cooling. This model, however, requires largely supersaturated HCN. Zonal winds and vertical compositional variations of the atmosphere are also unable to explain the observed mesospheric trend.These events are the last useful ground-based occultations recorded before the 29 June 2015 occultation observed from Australia and New Zealand, and before the NASA's New Horizons flyby of July 2015. This work can serve as a benchmark in the New Horizons context, enabling comparisons between ground-based and space results concerning Pluto's atmospheric structure and temporal evolution. [less ▲]

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See detailFive years of comet narrow band photometry and imaging with TRAPPIST
Opitom, Cyrielle ULg; Jehin, Emmanuel ULg; Manfroid, Jean ULg et al

in Bulletin of the American Astronomical Society (2015, November 01), 47

TRAPPIST is a 60-cm robotic telescope in La Silla Observatory [1] mainly dedicated to the study of exoplanets and comets. The telescope is equipped with a set of narrow band cometary filters designed by ... [more ▼]

TRAPPIST is a 60-cm robotic telescope in La Silla Observatory [1] mainly dedicated to the study of exoplanets and comets. The telescope is equipped with a set of narrow band cometary filters designed by the NASA for the Hale-Bopp observing campaign [2]. Since its installation in 2010, we gathered a high quality and homogeneous data set of more than 30 bright comets observed with narrow band filters. Some comets were only observed for a few days but others have been observed weekly during several months on both sides of perihelion. From the images, we derived OH, NH, CN, C[SUB]2[/SUB], and C[SUB]3[/SUB] production rates using a Haser [3] model in addition to the Afρ parameter as a proxy for the dust production. We computed production rates ratios and the dust color for each comet to study their composition and followed the evolution of these ratios and colors with the heliocentric distance.The TRAPPIST data set, rich of more than 10000 images obtained and reduced in an homogeneous way, allows us to address several fundamental questions such as the pristine or evolutionary origin of composition differences among comets. The evolution of comet activity with the heliocentric distance, the differences between species, and from comet to comet, will be discussed. Finally, the first results about the one year campaign on comet C/2013 US10 (Catalina) and our recent work on the re-determination of Haser scalelengths will be presented.[1] Jehin et al., The Messenger, 145, 2-6, 2011[2] Farnham et al., Icarus, 147, 180-204, 2000[3] Haser, Bulletin de l’Académie Royal des Sciences de Belgique,63, 739, 1957 [less ▲]

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