References of "Scientific journals"      in Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages & linguistics   Literature   Performing arts   Philosophy & ethics   Religion & theology   Multidisciplinary, general & others Business & economic sciences   Accounting & auditing   Production, distribution & supply chain management   Finance   General management & organizational theory   Human resources management   Management information systems   Marketing   Strategy & innovation   Quantitative methods in economics & management   General economics & history of economic thought   International economics   Macroeconomics & monetary economics   Microeconomics   Economic systems & public economics   Social economics   Special economic topics (health, labor, transportation…)   Multidisciplinary, general & others Engineering, computing & technology   Aerospace & aeronautics engineering   Architecture   Chemical engineering   Civil engineering   Computer science   Electrical & electronics engineering   Energy   Geological, petroleum & mining engineering   Materials science & engineering   Mechanical engineering   Multidisciplinary, general & others Human health sciences   Alternative medicine   Anesthesia & intensive care   Cardiovascular & respiratory systems   Dentistry & oral medicine   Dermatology   Endocrinology, metabolism & nutrition   Forensic medicine   Gastroenterology & hepatology   General & internal medicine   Geriatrics   Hematology   Immunology & infectious disease   Laboratory medicine & medical technology   Neurology   Oncology   Ophthalmology   Orthopedics, rehabilitation & sports medicine   Otolaryngology   Pediatrics   Pharmacy, pharmacology & toxicology   Psychiatry   Public health, health care sciences & services   Radiology, nuclear medicine & imaging   Reproductive medicine (gynecology, andrology, obstetrics)   Rheumatology   Surgery   Urology & nephrology   Multidisciplinary, general & others Law, criminology & political science   Civil law   Criminal law & procedure   Criminology   Economic & commercial law   European & international law   Judicial law   Metalaw, Roman law, history of law & comparative law   Political science, public administration & international relations   Public law   Social law   Tax law   Multidisciplinary, general & others Life sciences   Agriculture & agronomy   Anatomy (cytology, histology, embryology...) & physiology   Animal production & animal husbandry   Aquatic sciences & oceanology   Biochemistry, biophysics & molecular biology   Biotechnology   Entomology & pest control   Environmental sciences & ecology   Food science   Genetics & genetic processes   Microbiology   Phytobiology (plant sciences, forestry, mycology...)   Veterinary medicine & animal health   Zoology   Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences   Chemistry   Earth sciences & physical geography   Mathematics   Physics   Space science, astronomy & astrophysics   Multidisciplinary, general & others Social & behavioral sciences, psychology   Animal psychology, ethology & psychobiology   Anthropology   Communication & mass media   Education & instruction   Human geography & demography   Library & information sciences   Neurosciences & behavior   Regional & inter-regional studies   Social work & social policy   Sociology & social sciences   Social, industrial & organizational psychology   Theoretical & cognitive psychology   Treatment & clinical psychology   Multidisciplinary, general & others     Showing results 1101 to 1200 of 49752     7 8 9 10 11 12 13 14 15 16 17     Un nouvel instrument d’évaluation des altérations du comportement auditif chez l’enfant avec autisme : l’échelle EACAA - E (Echelle Altérations Comportement Auditif Autisme - Enfant)Filipova, Marina; Boulard, Aurore ; Blanc, Romuald et alin Revue Francophone de Clinique Comportementale et Cognitive (2014), XIX(3), 57-69Detailed reference viewed: 96 (7 ULg) Evaluation of the oxidative stability of blends of ‘Arbequina’ olive oils with other monovarietal olive oilsMansouri, F.; Ben Moumen, A.; Houmy, N. et alin Olivae (Official Journal of the International Olive Council) (2014), 120Like elsewhere in the Mediterranean, the olive oil sector is one of the strategic branches of the Moroccan economy owing to its social and economic significance. This research entailed evaluation of the ... [more ▼]Like elsewhere in the Mediterranean, the olive oil sector is one of the strategic branches of the Moroccan economy owing to its social and economic significance. This research entailed evaluation of the oxidative stability of olive oils made up of a blend of ‘Arbequina’ olive oil with ‘Arbosana’ and ‘Koroneiki’ monovarietal oils known for their high content of natural antioxidants (phenols and tocopherols) and their superior oxidative stability compared with ‘Arbequina’ oil. The monovarietal oils produced from the ‘Arbequina’, ‘Arbosana’ and ‘Koroneiki’ varieties, which have recently been introduced under intensive cultivation in the eastern region of Morocco, underwent physico–chemical characterisation to determine quality criteria, natural antioxidant content, fatty acid composition and triacylglycerol profile. The Rancimat test* was performed to assess the oxidative stability of these monovarietal oils and their three-variety blends. The oxidation tests were performed on five freshly prepared blends (A) of the three varieties – ‘Arbequina’/’Arbosana’/‘Koroneiki’ – according to the following volume ratios: A1: 60/30/10; A2: 60/20/20; A3: 60:10:30; A4: 50:25:25 and A5: 40:30:30. The test results show that blends A4 and A5 displayed the best oxidative stability, recording respective values of 72.67 h and 75.42 h. These results are comparable to those obtained for ‘Arbosana’ monovarietal oil (75.42 h), which is considered to be relatively stable. Hence, blending is an excellent tool for enhancing oils produced from varieties which, despite their excellent initial quality and their organoleptic attributes, are handicapped by their poor stability, as is the case of ‘Arbequina’ oil. [less ▲]Detailed reference viewed: 10 (0 ULg) Adolescent Risk Behaviours and Protective Factors Against Peer InfluenceCattelino, Elena; Glowacz, Fabienne ; Born, Michel et alin Journal of Adolescence (2014), 37(8), 1353-1362This study examined the relationships between protective factors and involvement in risk behaviour of Italian adolescents with friends involved in risk. Protective factors were drawn from models of peers ... [more ▼]This study examined the relationships between protective factors and involvement in risk behaviour of Italian adolescents with friends involved in risk. Protective factors were drawn from models of peers and from individual skills (perceived regulatory self-efficacy, intolerant attitudes about deviance) and orientation (to health, school, religion). The data are from two waves, 1 year apart, of a questionnaire survey of adolescents in northwestern Italy. Participants were 908 adolescents (42% boys) ages 14–16 years. Results of a hierarchical regression revealed that religiosity is a protective factor and that friends’ models for conventional behaviours and positive attitude about health can mitigate the influence of deviant friends on adolescent risk behaviour 1 year later, even after controlling for prior levels of risk behaviour. Possible implications of this study suggest the importance of implementing preventive interventions by involving the peer group, especially at about 16 years, and working with heterogeneous (deviant and nondeviant) groups. [less ▲]Detailed reference viewed: 29 (2 ULg) Input of supercritical carbon dioxide to polymer synthesis: an overviewBoyère, Cédric; Jérôme, Christine ; Debuigne, Antoine in European Polymer Journal (2014), 61The ongoing search for environmentally friendlier alternative to the organic solvents used in chemical processes has led to the development of technologies based on supercritical carbon dioxide (scCO2 ... [more ▼]The ongoing search for environmentally friendlier alternative to the organic solvents used in chemical processes has led to the development of technologies based on supercritical carbon dioxide (scCO2), which is non-flammable, non-toxic and relatively inert fluid. Polymer chemistry does not escape this trend and last achievements in the field of polymer synthesis in scCO2 are reviewed here. Without claiming to be exhaustive, we go through and discuss the benefits of the main polymerization processes in scCO2 including homogeneous, precipitation, dispersion, suspension and emulsion systems. A particular attention is drawn to water/carbon dioxide emulsion polymerization and to the suited surface active agents. This review also underlines that heterogeneous polymerization based on CO2 is more than a strategy for reducing the ecological footprint of the polymer production but it allows structuring the polymer materials into particles or highly interconnected macroporous networks. [less ▲]Detailed reference viewed: 46 (7 ULg) Analyse tridimensionnelle de la voie aérienne supérieure des patients atteints d'un syndrome d'apnées et d'hypopnées obstructives du sommeil par la technique du Cone Beam.BRUWIER, Annick ; POIRRIER, Anne-Lise ; LIMME, Michel et alin Revue Médicale de Liège (2014)Detailed reference viewed: 17 (1 ULg) Gérer les différences : une préoccupation communeBlondin, Christiane ; Cornet, Jacques; Delvaux, Bernardin Education et formation (2014), e-302Detailed reference viewed: 12 (1 ULg) Manifesto de Curitiba: pela Prevenção Quaternária e por uma Medicina sem conflitos de interesseSilva, André Luiz da; Mangin, Derelie; Pizzanelli, Miguel et alin Revista Brasileira de Medicina de Família e Comunidade (2014), 9(33), 371-374Detailed reference viewed: 27 (3 ULg) Vers un dialogue entre la recherche quantitative et les pratiques de classes : une illustration avec Pirls 2011Schillings, Patricia ; Dupont, Virginie ; Hindryckx, Geneviève in Education & Formation (2014), e-302Detailed reference viewed: 13 (2 ULg) Ce que gérer la faune implique : une approche par la théorie de l'acteur-réseau - Le cas de la conservation de l'ours brun dans les Pyrénées FrançaisesDenayer, Dorothée ; Collard, Damienin Gérer et Comprendre (2014)Detailed reference viewed: 49 (22 ULg) Metacognitive components in learning to learn approachesFrenkel, Stéphanie in International Journal of Psychology : A Biopsychosocial Approach (2014), 14Background. Numerous students are having school difficulties linked to the way they learn. Some people speak of a “metacognitive deficit”. We refer to a “sleeping potential” instead. Be it psychologists ... [more ▼]Background. Numerous students are having school difficulties linked to the way they learn. Some people speak of a “metacognitive deficit”. We refer to a “sleeping potential” instead. Be it psychologists, teachers or parents, all wish to develop their skills in order to help these students. This is the case in primary and secondary school. The EDUCA + project is intended to provide possible solutions. Purpose. The aim of this paper is to present a metacognitive and cognitive theory of learning to learn, which will (a) explain why numerous students are having school difficulties, and (b) predict the success of the EDUCA + project. [less ▲]Detailed reference viewed: 69 (18 ULg) Genetic parameters for direct and maternal calving ease in Walloon dairy cattle based on linear and threshold modelsVanderick, Sylvie ; Troch, Thibault ; Gillon, Alain et alin Journal of Animal Breeding & Genetics (2014), 131(6), 513-521Calving ease scores from Holstein dairy cattle in the Walloon Region of Belgium were analysed using univariate linear and threshold animal models. Variance components and derived genetic parameters were ... [more ▼]Calving ease scores from Holstein dairy cattle in the Walloon Region of Belgium were analysed using univariate linear and threshold animal models. Variance components and derived genetic parameters were estimated from a dataset including 33,155 calving records. Included in the models were season, herd and sex of calf age of dam classes group of calvings interaction as fixed effects, herd year of calving, maternal permanent environment and animal direct and maternal additive genetic as random effects. Models were fitted with the genetic correlation between direct and maternal additive genetic effects either estimated or constrained to zero. Direct heritability for calving ease was about 8% with linear models and about 12% with threshold models. Maternal heritabilities were about 2% and 4%, respectively. Genetic correlation between direct and maternal additive effects was found to be not significantly different from zero. Models were compared in terms of goodness of fit and predictive ability. Criteria of comparison such as mean squared error, correlation between observed and predicted calving ease scores as well as between estimated breeding values were estimated from 85,118 calving records. The results provided few differences between linear and threshold models even though correlations between estimated breeding values from subsets of data for sires with progeny from linear model were 17% and 23 % greater for direct and maternal genetic effects, respectively, than from threshold model. For the purpose of genetic evaluation for calving ease in Walloon Holstein dairy cattle, the linear animal model without covariance between direct and maternal additive effects was found to be the best choice. [less ▲]Detailed reference viewed: 32 (10 ULg) Les arabismes dans le TLF : tentative de classement historiqueBaiwir, Esther in Revue de Linguistique Romane (2014), 78Parmi les nombreux mots traditionnellement étiquetés comme «arabismes» figurent des cas relevant de classes diverses. Nous jetons ici un regard diachronique et global sur cette classe de lexèmes ... [more ▼]Parmi les nombreux mots traditionnellement étiquetés comme «arabismes» figurent des cas relevant de classes diverses. Nous jetons ici un regard diachronique et global sur cette classe de lexèmes particuliers, parmi lesquels nous distinguons les emprunts dits directs, émanant de contacts récurrents et prolongés entre populations arabophones et populations francophones, et les emprunts dits indirects, qu'en toute rigueur nous devrions exclure de notre étude en vertu de la défiance légitime envers l'etimologia remota. Nous tentons cependant de montrer que cette méfiance mérite d'être nuancée à l'aune des conclusions que cette pratique lexicographique permet de tirer sur les mouvements socio-historiques qu'elle illustre. En effet, de l'examen des itinéraires et des époques d'emprunt se dégage l'histoire des relations entre monde arabophone et monde roman. [less ▲]Detailed reference viewed: 28 (4 ULg) A New Shift-Share MethodArtige, Lionel ; Van Neuss, Leif in Growth and Change (2014), 45(4), 667-683Shift-share analysis is a decomposition technique widely used in regional studies to quantify an industry-mix eﬀect and a competitive eﬀect on the growth of regional employment (or any other relevant ... [more ▼]Shift-share analysis is a decomposition technique widely used in regional studies to quantify an industry-mix eﬀect and a competitive eﬀect on the growth of regional employment (or any other relevant variable) relative to the national average. This technique has always been subject to criticism for its lack of theoretical basis. This paper presents a critical assessment of the methods suggested by Dunn (1960) and by Esteban-Marquillas (1972) and proposes a new shift-share method, which separates out the two eﬀects unambiguously. By way of illustration, we provide an application to manufacturing employment in the Belgian provinces between 1995 and 2007. [less ▲]Detailed reference viewed: 67 (15 ULg) Transient small-scale structure in the main auroral emission at JupiterPalmaerts, Benjamin ; Radioti, Aikaterini ; Grodent, Denis et alin Journal of Geophysical Research. Space Physics (2014), 119Detailed reference viewed: 23 (10 ULg) Bronchial thermoplasty: a new therapeutic option for the treatment of severe, uncontrolled asthma in adults.Dombret, Marie-Christine; Alagha, Khuder; Philippe Boulet, Louis et alin European respiratory review : an official journal of the European Respiratory Society (2014), 23(134), 510-8Bronchial thermoplasty is a young yet promising treatment for severe asthma whose benefit for long-term asthma control outweighs the short-term risk of deterioration and hospitalisation in the days ... [more ▼]Bronchial thermoplasty is a young yet promising treatment for severe asthma whose benefit for long-term asthma control outweighs the short-term risk of deterioration and hospitalisation in the days following the treatment. It is an innovative treatment whose clinical efficacy and safety are beginning to be better understood. Since this is a device-based therapy, the overall evaluation of risk-benefit is unlike that of pharmaceutical products; safety aspects, regulatory requirements, study design and effect size assessment may be unfamiliar. The mechanisms of action and optimal patient selection need to be addressed in further rigorous clinical and scientific studies. Bronchial thermoplasty fits in perfectly with the movement to expand personalised medicine in the field of chronic airway disorders. This is a device-based complimentary asthma treatment that must be supported and developed in order to meet the unmet needs of modern severe asthma management. The mechanisms of action and the type of patients that benefit from bronchial thermoplasty are the most important challenges for bronchial thermoplasty in the future. [less ▲]Detailed reference viewed: 13 (3 ULg) PONTE ET QUALITÉ D’OEUFS DE CAILLES ÉLEVÉES EN CONDITIONS SEMI INTENSIVES DANS L’EST ALGÉRIENMoula, Nassim ; Philippe, François-Xavier ; Ait Kaki, Asma et alin Archivos de Zootecnia (2014), 63(244), 693-696This work investigates laying performances and egg quality of 200 quails during 266 laying days. The first collected 240 eggs, for the periods: 12, 16, 20, 24, 28, 32, 36, 40, 44 weeks were used in this ... [more ▼]This work investigates laying performances and egg quality of 200 quails during 266 laying days. The first collected 240 eggs, for the periods: 12, 16, 20, 24, 28, 32, 36, 40, 44 weeks were used in this study. The average laying rate calculated over a period of 37 weeks is 74.44 %. All studied eggs quality parameters were significantly (p<0.001) influenced by the age of the quail. The average weight of the whole egg (13.66 g), yolk (3.99 g) and shell (2.28 g) reach their maximum value at the 40th week. The maximum albumen average weight (7.45 g) was observed at 32nd week. Albumen (12.02) and yolk (48.72) indices recorded their highest values at the 12th and the 16th weeks, respectively. The eggs freshness, expressed here by Haugh units decreased with age. They range from 89.56 at the 12th week to 83.71 at the 44th week of age. Yolk color registered values with irregular fluctuations (7.12 to 9.33) in a colorimetric scale of 15 ladders. Highly significant and positive correlations (p<0.001) and were recorded between the whole egg weight and the weight of albumen, yolk and shell. To conclude, the quail age affects significantly the various egg quality parameters. [less ▲]Detailed reference viewed: 40 (7 ULg) Maîtriser des savoirs : un gage de moindre iniquité dans l'apprentissage des compétences en classe d'histoire au secondaire ?Jadoulle, Jean-Louis in Education & Formation (2014), e-302Detailed reference viewed: 10 (1 ULg) Comment je traite … Recommandations pour interrompre un traitement médicamenteuxSCHEEN, André in Revue Médicale de Liège (2014), 69(12), 644-649L’interruption d’un traitement pharmacologique est une situation clinique fréquente qui peut paraître plus simple à gérer que l’instauration d’un nouveau traitement, mais qui impose néanmoins de remplir ... [more ▼]L’interruption d’un traitement pharmacologique est une situation clinique fréquente qui peut paraître plus simple à gérer que l’instauration d’un nouveau traitement, mais qui impose néanmoins de remplir certaines conditions et de respecter certaines précautions : 1) pouvoir expliciter les raisons qui justifient l’arrêt du traitement; 2) vérifier qu’il n’y a pas de danger à interrompre le traitement (même si cette interruption est transitoire); 3) savoir comment gérer au mieux l’arrêt de la thérapeutique, en particulier choisir entre une interruption immédiate et une décroissance posologique progressive; et, enfin, 4) assurer un suivi approprié du patient dûment informé chez lequel le traitement vient d’être stoppé. [less ▲]Detailed reference viewed: 18 (2 ULg) Using approximate dynamic programming for estimating the revenues of a hydrogen-based high-capacity storage deviceFrançois-Lavet, Vincent ; Fonteneau, Raphaël ; Ernst, Damien in IEEE Symposium Series on Computational Intelligence (2014)This paper proposes a methodology to estimate the maximum revenue that can be generated by a company that operates a high-capacity storage device to buy or sell electricity on the day-ahead electricity ... [more ▼]This paper proposes a methodology to estimate the maximum revenue that can be generated by a company that operates a high-capacity storage device to buy or sell electricity on the day-ahead electricity market. The methodology exploits the Dynamic Programming (DP) principle and is specified for hydrogen-based storage devices that use electrolysis to produce hydrogen and fuel cells to generate electricity from hydrogen. Experimental results are generated using historical data of energy prices on the Belgian market. They show how the storage capacity and other parameters of the storage device influence the optimal revenue. The main conclusion drawn from the experiments is that it may be advisable to invest in large storage tanks to exploit the inter-seasonal price fluctuations of electricity. [less ▲]Detailed reference viewed: 36 (18 ULg) Speciation in Malagasy lemurs: a review of the cryptic diversity in genus LepilemurWilmet, Leslie ; Schwitzer, Christoph; Devillers, Pierre et alin Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2014), 18(4), 577-588Madagascar is one of the highest biodiversity hotspots on the planet; however, it is also one of the most heavily impacted countries in the world in terms of forest degradation and general habitat ... [more ▼]Madagascar is one of the highest biodiversity hotspots on the planet; however, it is also one of the most heavily impacted countries in the world in terms of forest degradation and general habitat destruction. Genus Lepilemur, in family Lepilemuridae, is a genus of small, nocturnal, exclusively arboreal Malagasy folivores. All species in the genus have small ranges of distribution. Fully forest-dependent, they have a high risk of extinction. Various models and theories of speciation mechanisms have been developed for the fauna and flora of Madagascar. For instance, in the northwestern part of the island, some authors used Lepilemur spp. to test two existing models of distribution: the “Martin model” and “Wilmé model”. Regarding the impact of forest destruction and habitat degradation in Madagascar, conservation strategies for Lepilemur need to be put in place. This paper gives an overview of the current knowledge of the genus Lepilemur and examines speciation for Malagasy lemurs. The understanding of species distribution within biodiversity hotspots is important to identify target for conservation. Therefore, we summarize and compare three biogeography models related to lemurs distribution in order to understand the reasons behind the high diversity (26 species in total) among the genus Lepilemur. Particular attention is also given to the concept of species regarding biodiversity issues and the taxonomic explosion in genus Lepilemur. [less ▲]Detailed reference viewed: 42 (6 ULg) Composantes métacognitives ; Définitions et outils d’évaluationFrenkel, Stéphanie in Enfance : Psychologie, Pédagogie, Neuropsychiatrie, Sociologie (2014), 4Many tools have been developed since the 1970s in order to assess metacognition and its first implementations. Over time, questionnaires, tests, interviews, observations, computer programmes, and other ... [more ▼]Many tools have been developed since the 1970s in order to assess metacognition and its first implementations. Over time, questionnaires, tests, interviews, observations, computer programmes, and other methods have become more and more based on self-regulated learning theories. At the same time, for the last fifteen years or so, the number of students with learning difficulties linked to the way they learn seems to be increasing slowly but steadily. Therefore, it seems essential to enable these learners develop a more efficient learning behaviour. Similarly, we see that professional field workers are increasingly asking for efficient and adapted tools in this field. The purpose of this paper is twofold: it provides a review of the above-mentioned assessment tools, and it discusses them in order to contribute to the creation of new tools with a wider scope. Following an analysis of the abundant literature on the subject, two classifications were developed. Thirty-five tools were kept and categorised: first, according to a developmental perspective (preschool, primary school, secondary school and/or adult), second, according to the metacognitive component they assess (metacognitive knowledge, strategies and/or experiences). However, no existing tool covers the whole period of compulsory education. Moreover, in order to assess the learners’ metacognitive abilities fully, it is necessary to combine online and offline assessments in concrete situations. There are still some needs to be met in this regard. [less ▲]Detailed reference viewed: 107 (24 ULg) Methodology to characterize a residential building stock using a bottom-up approach: a case study applied to BelgiumGendebien, Samuel ; Georges, Emeline ; Bertagnolio, Stéphane et alin International Journal of Sustainable Energy Planning and Management (2014)Detailed reference viewed: 35 (13 ULg) Impact of gender difference in hospital outcomes following percutaneous coronary intervention. Results of the Belgian Working Group on Interventional Cardiology (BWGIC) registryLEMPEREUR, Mathieu ; Magne, Julien; Cornelis, Kristoff et alin EuroIntervention : Journal of EuroPCR in Collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology (2014)Aims: To determine whether there are gender-based differences in in-hospital outcomes among patients undergoing percutaneous coronary intervention (PCI). Methods and results: We studied a large cohort ... [more ▼]Aims: To determine whether there are gender-based differences in in-hospital outcomes among patients undergoing percutaneous coronary intervention (PCI). Methods and results: We studied a large cohort using clinical data from a registry of 130,985 PCI procedures in Belgium, from January 2006 to February 2011. Compared to males, females were significantly older (70.3 vs. 64.8 years), and were more frequently diabetic or hypertensive. Men smoked more and more frequently had previous myocardial infarction (MI), previous PCI or previous coronary artery bypass graft (CABG) surgery. Coronary artery disease (CAD) was less severe in women, and PCI to the left anterior descending artery was more common in female patients. Unadjusted in-hospital mortality rates were higher in females versus males (2.5% for women and 1.6% for men, p<0.0001). After multivariable analysis, female gender remained an independent predictor of mortality (odds ratio 1.35, 95% CI: 1.22-1.49, p<0.0001). Conclusions: Gender-based differences in hospital mortality rates after PCI were observed in this large registry. Female sex remained an independent predictor of mortality after multivariable adjustment. [less ▲]Detailed reference viewed: 36 (4 ULg) François DÉROCHE e Valentina SAGARIA ROSSI, I manoscritti in caratteri arabi. Al-maḫṭūṭāt bi-l-ḥarf al-ʿarabī, Roma: Viella, 2012, xviii + 350 p., ISBN 978-8-883-34687-3 (Scritture e Libri del medioevo, 9)Franssen, Elise in Quaderni di Studi Arabi (2014), n.s. 9Detailed reference viewed: 53 (2 ULg) Evaluation of the durability of hydrophobic treatments on concrete architectural heritageLucquiaud, Vincent ; Courard, Luc ; Gérard, Olivier et alin Restoration of Buildings and Monuments = Bauinstandsetzen und Baudenkmalpflege (2014), 20(6), 395404The protection of historical concrete structures is a challenge for the coming years. Hydrophobic treatment may reduce the deterioration process while providing protection against water penetration ... [more ▼]The protection of historical concrete structures is a challenge for the coming years. Hydrophobic treatment may reduce the deterioration process while providing protection against water penetration. Existing commercial products —mainly silane or siloxane in either water or solvent based formulations– were submitted to different ageing processes including UV radiation, dry-wet cycles, thermal shocks, freeze-thaw cycles, carbonation and their effectiveness has been evaluated on the basis of contact angle, vapour and chloride permeability and, capillarity water absorption. The results obtained clearly show that hydrophobic treatments display a good behaviour under the main ageing conditions. [less ▲]Detailed reference viewed: 44 (15 ULg) Division ethnoraciale et pénalisationVanneste, Charlotte in Revue de l'Institut de Sociologie de l'Université Libre de Bruxelles (2014), volume 2013Detailed reference viewed: 20 (2 ULg) Vitrification, an efficient cryopreservation procedure but still rising some debatesVanderzwalmen, Pierre; Ectors, Fabien ; Stecher, Astrid et alin Current Trends in Clinical Embryology (2014), 1(1), 34-45Detailed reference viewed: 21 (15 ULg) Poly( N-vinylcaprolactam): A thermoresponsive macromolecule with promising future in biomedical fieldLiu, Ji; Debuigne, Antoine ; Detrembleur, Christophe et alin Advanced Healthcare Materials (2014), 3(12), 1941-1968Poly( N -vinylcaprolactam) (PNVCL) is a thermoresponsive and biocompatible polymer that raises an increasing interest in the biomedical area, especially in drug delivery systems (DDS) that include ... [more ▼]Poly( N -vinylcaprolactam) (PNVCL) is a thermoresponsive and biocompatible polymer that raises an increasing interest in the biomedical area, especially in drug delivery systems (DDS) that include micelles, hydrogels, and hybrid particles. The thermoresponsiveness of PNVCL, used alone or in combination with other stimuli- responsive polymers or particles (pH, magnetic fi eld, or chemicals), is often key in the loading and/or release process in these DDS. The renewed focus on this polymer, which is known for decades, is to a large extent due to recent progress in synthetic strategies. Especially, the advent of efficient controlled radical polymerization (CRP) methods for NVCL monomer gives now access to unprecedented well-defi ned NVCL-based copolymers with unique properties. This Review article addresses up-to-date synthetic aspects, biological features, and biomedical applications of the latest NVCL-containing systems. [less ▲]Detailed reference viewed: 57 (8 ULg) De Christophe Colomb à Barack Obama - une chronologie des musiques afro-américainesSacré, Robert in ABS Magazine (2014), (44), 15Compte rendu d'un ouvrage de Jean Paul Levet , tome 1 ( sous titré Une chronologie des musiques afro-américaines)Detailed reference viewed: 19 (1 ULg) Toward a tool aimed to quantify soil compaction risks at a regional scale: application to Wallonia (Belgium)D'Or, Dimitri; Destain, Marie-France in Soil & Tillage Research (2014), 144The spatial analysis of the soil compaction risk has been developed at the regional level and applied to Wallonia (Belgium). The methodology is based on the estimation of the probability of exceeding the ... [more ▼]The spatial analysis of the soil compaction risk has been developed at the regional level and applied to Wallonia (Belgium). The methodology is based on the estimation of the probability of exceeding the preconsolidation stress due to the application of loads on the soil. Preconsolidation stresses (Pc) are computed from the pedotransfer functions of Horn and Fleige (2003) at pF 1.8 and 2.5 and classified into 6 categories ranging from very low Pc (< 30 kPa) to extremely high Pc (> 150 kPa). The computation requires the knowledge of pedological (texture, organic content), mechanical (bulk density, cohesion, internal friction angle), and hydraulic variables (water content available, non-available water content, air capacity, saturated hydraulic conductivity). These variables are obtained from databases like HYPRES or AARDEWERK or from pedotransfer functions. The computation of Pc takes into account the spatial structure of the data: in some cases, data are abundant (e.g. texture data) and spatial variability is taken into account through geostatistical methods. In other cases, the data is sparse but uncertainty information can be extracted from the knowledge of the statistical distribution. Maps of the most probable Pc class are produced. Uncertainty is computed as the classification error probability. Implementation of these methods in Wallonia showed that Pc values higher than 120 kPa are reached either on 64 % of the territory at pF 2.5 or on 55 % at pF 1.8. A higher uncertainty was found at pF 2.5 than at pF 1.8. Uncertainty was also found higher for clay and clayed loess than for other textural classes present in Wallonia. The risk of compaction is defined as the probability that Pc is exceeded by the stress created by a load applied to the soil at a depth of 40 cm, the loads being similar to those induced by agricultural or forestry tires. It appeared that subsoil compaction risks exist mainly in loamy forest soils with small coarse fragments supporting loads similar to that existing on logging machines. In the zones where the uncertainty is low, the developed tool could be used as a basis for providing policy measures in order to promote soil-friendly farming and forest practices. [less ▲]Detailed reference viewed: 48 (20 ULg) La camorra e la periferia nel boscoDe Biase, Marco in Lavoro Culturale (2014)Detailed reference viewed: 15 (2 ULg) Par-delà l'approche par compétences : quelle place réserver aux savoirs, à leur enseignement et à leur évaluation ?Chenu, Florent ; Crahay, Marcel ; Lafontaine, Dominique in Education & Formation (2014), e-302Detailed reference viewed: 52 (5 ULg) Natural killer and dendritic cells collaborate in the immune response induced by the vaccine against uterine cervical cancer.Langers, Inge ; Renoux, Virginie; Reschner, Anca et alin European journal of immunology (2014), 44Virus-like particles (VLPs) of human papillomavirus (HPV) are used as a vaccine against HPV-induced cancer, and recently we have shown that these VLPs are able to activate natural killer (NK) cells. Since ... [more ▼]Virus-like particles (VLPs) of human papillomavirus (HPV) are used as a vaccine against HPV-induced cancer, and recently we have shown that these VLPs are able to activate natural killer (NK) cells. Since NK cells collaborate with dendritic cells (DCs) to induce an immune response against viral infections and tumors, we studied the impact of this crosstalk in the context of HPV vaccination. NK cells in the presence of HPV-VLPs enhanced DC maturation as shown by an upregulation of CD86 and HLA-DR and an increased production of IL-12p70, but not of the immunosuppressive cytokine IL-10. This activation was bi-directional. Indeed, in the presence of HPV-VLPs, DCs further activated NK cells by inducing the upregulation of cell surface activation markers (CD69 and HLA-DR). The function of NK cells was also improved as shown by an increase in IFN-gamma secretion and cytotoxic activity against an HPV+ cell line. This crosstalk between NK cells and DCs needed CD40 interaction and IL-12p70 secretion, whereas NKG2D was not implicated. Our results provide insight into how VLPs interact with innate immune cells and how NK cells and DCs play a role in the immune response induced by this vaccine agent. This article is protected by copyright. All rights reserved. [less ▲]Detailed reference viewed: 64 (6 ULg) Spectral Analysis and Abundances of the Post-HB Star HD 76431Khalack, V.; Yameogo, B.; LeBlanc, F. et alin Monthly Notices of the Royal Astronomical Society (2014), 445HD76431 is a slow rotating post-HB star that shows an underabundance of helium by 0.5 dex relative to the solar value. These observational facts suggest that atomic diffusion could be active in its ... [more ▼]HD76431 is a slow rotating post-HB star that shows an underabundance of helium by 0.5 dex relative to the solar value. These observational facts suggest that atomic diffusion could be active in its atmosphere. We have used the MMT and Bok spectra to estimate the atmospheric parameters of the target star using the model atmospheres and synthetic spectra calculated with TLUSTY and SYNSPEC. The derived values of the effective temperature, surface gravity, helium abundance are consistent with those obtained by Ramspeck et al. (2001b). It appears that NLTE effect are not important for HD76431. We have used Stokes I spectra from ESPaDOnS at CFHT to perform an abundance analysis and a search for observational evidence of vertical stratification of the abundance of certain elements. The results of our abundance analysis are in good agreement with previously published data with respect to average abundances. Our numerical simulations show that carbon and nitrogen reveal signatures of vertical abundance stratification in the atmosphere of HD76431. It appears that the carbon abundance increases toward the deeper atmospheric layers. Nitrogen also shows a similar behaviour, but in deeper atmospheric layers we obtain a significant dispersion for the estimates of its abundance. To our knowledge, this is the first demonstration of vertical abundance stratification of metals in a post-HB star and up to now it is the hottest star to show such stratification features. We also report the detection of two SiIII and one TiIII emission lines in the spectra of HD76431 that were not detected in previous studies. [less ▲]Detailed reference viewed: 15 (1 ULg) De la satisfaction à la performance : Dépasser les indicateurs de satisfaction pour évaluer et réguler efficacementJacquet, Maud ; Maillart, Christelle ; Georges, François et alin Education & Formation (2014), e-302Dans le cadre de la formation en logopédie à l'ULg, un examen certificatif de langue française a été mis en place afin de répondre aux exigences de la profession. Pour y préparer les étudiants, l’unité de ... [more ▼]Dans le cadre de la formation en logopédie à l'ULg, un examen certificatif de langue française a été mis en place afin de répondre aux exigences de la profession. Pour y préparer les étudiants, l’unité de logopédie clinique, l’Institut Supérieur des Langues Vivantes (ISLV) et le Laboratoire de Soutien aux synergies Enseignement-Technologie (LabSET) de l’Université de Liège (ULg) ont conçu un dispositif hybride d’apprentissage et de remédiation en langue française. Depuis 2011, ce dispositif offre aux étudiants un environnement de travail en ligne visant à soutenir leur apprentissage autonome du français. Malgré une importante satisfaction vis-à-vis du dispositif, les performances demeurent insuffisantes. Cependant, un groupe d’étudiants se distinguent. Une analyse qualitative basée sur des interviews met en évidence chez ces étudiants 1) une bonne connaissance des stratégies cognitives efficaces en termes d’apprentissage, 2) une certaine capacité à planifier et ajuster leur travail et 3) des indicateurs d’une motivation autodéterminée et intrinsèque. Soutenus par le dispositif et ses caractéristiques, il est probable que ces facteurs soient à l’origine de leur succès. Pour des étudiants peut-être encore trop scolaires, principalement soucieux de leurs résultats à l'examen et peu enclins à identifier leurs besoins, la liberté offerte par le dispositif fait naitre un sentiment de satisfaction mais ne suffit pas à un apprentissage de qualité. [less ▲]Detailed reference viewed: 57 (5 ULg) Identification and characterization of drought stress responsive genes in faba bean (Vicia faba L.) by suppression subtractive hybridizationAbid, Ghassen; Muhovski, Yordan; Mingeot, Dominique et alin Plant Cell, Tissue & Organ Culture (2014)Detailed reference viewed: 12 (1 ULg) LaTeX, un peu, beaucoup (6. Tableaux)Dupont, Pascal in Losanges (2014), 27Detailed reference viewed: 10 (1 ULg) The apoptosis of osteoblasts and osteocytes in femoral head osteonecrosis: its specificity and its distributionMutijima E; De Maertelaer V; Deprez M et alin Clinical Rheumatology (2014), 33(12), 1791-5Detailed reference viewed: 7 (0 ULg) Aboveground biomass mapping of African forest mosaics using canopy texture analysis: toward a regional approach.Bastin, Jean-François ; Barbier, Nicolas; Couteron, Pierre et alin Ecological Applications (2014), 24(8), 1984-2001In the context of the reduction of greenhouse gas emissions caused by deforestation and forest degradation (the REDD+ program), optical very high resolution (VHR) satellite images provide an opportunity ... [more ▼]In the context of the reduction of greenhouse gas emissions caused by deforestation and forest degradation (the REDD+ program), optical very high resolution (VHR) satellite images provide an opportunity to characterize forest canopy structure and to quantify aboveground biomass (AGB) at less expense than methods based on airborne remote sensing data. Among the methods for processing these VHR images, Fourier textural ordination (FOTO) presents a good potential to detect forest canopy structural heterogeneity and therefore to predict AGB variations. Notably, the method does not saturate at intermediate AGB values as do pixelwise processing of available space borne optical and radar signals. However, a regional scale application requires to overcome two difficulties: (i) instrumental effects due to variations in sun-scene-sensor geometry or sensor-specific responses that preclude the use of wide arrays of images acquired under heterogeneous conditions and (ii) forest structural diversity including monodominant or open canopy forests, which are of particular importance in Central Africa. In this study, we demonstrate the feasibility of a rigorous regional study of canopy texture by harmonizing FOTO indices of images acquired from two different sensors (Geoeye-1 and QuickBird-2) and different sun-scene-sensor geometries and by calibrating a piecewise biomass inversion model using 26 inventory plots (1 ha) sampled across very heterogeneous forest types. A good agreement was found between observed and predicted AGB (RSE=15%; R²=0.85; p-value<0.001) across a wide range of AGB levels from 26 Mg/ha to 460 Mg/ha, and was confirmed by cross validation. A high-resolution biomass map (100 m pixels) was produced for a 400 km² area, and predictions obtained from both imagery sources were consistent with each other (r=0.86; slope=1.03; intercept=12.01 Mg/ha). These results highlight the horizontal structure of forest canopy as a powerful descriptor of the entire forest stand structure and heterogeneity. In particular, we show that quantitative metrics resulting from such textural analysis offer new opportunities to characterize the spatial and temporal variation of the structure of dense forests and may complement the toolbox used by tropical forest ecologists, managers or REDD+ national monitoring, reporting and verification bodies. [less ▲]Detailed reference viewed: 85 (36 ULg) La conversion des enfants juifs cachés dans la région liégeoise. Histoire et mémoire (1942-2010)Genin, Vincent in Revue d'Histoire Ecclésiastique (2014), 109(3-4), 815-856There is literature aplenty concerning the rescue of Jewish children in Belgium during the Second World War. However, it appears that some questions have remained unanswered to his day about the ... [more ▼]There is literature aplenty concerning the rescue of Jewish children in Belgium during the Second World War. However, it appears that some questions have remained unanswered to his day about the consequences and the memory processes of these rescues by the Catholic clergy of Liege. After a brief overview of said rescue activities (1942-1944), this contribution will broach, supported by hitherto unexplored archives, three issues: 1. what are the consecutives stages of the memory process from 1944 to 2010? 2. How was this recognition expressed and what were its manifestations or why did it fail to occur? 3. Who are the protagonists –Christians, Jews, Israelis- of this process and what are their interests? [less ▲]Detailed reference viewed: 52 (15 ULg) Three sub-Jupiter-mass planets: WASP-69b & WASP-84b transit active K dwarfs and WASP-70Ab transits the evolved primary of a G4+K3 binaryAnderson, D. R.; Collier Cameron, A.; Delrez, Laetitia et alin Monthly Notices of the Royal Astronomical Society (2014), 445(2), We report the discovery of the transiting exoplanets WASP-69b, WASP-70Ab and WASP-84b, each of which orbits a bright star (V ˜ 10). WASP-69b is a bloated Saturn-mass planet (0.26 MJup, 1.06 RJup) in a 3 ... [more ▼]We report the discovery of the transiting exoplanets WASP-69b, WASP-70Ab and WASP-84b, each of which orbits a bright star (V ˜ 10). WASP-69b is a bloated Saturn-mass planet (0.26 MJup, 1.06 RJup) in a 3.868-d period around an active, ˜1-Gyr, mid-K dwarf. ROSAT detected X-rays 60±27 arcsec from WASP-69. If the star is the source then the planet could be undergoing mass-loss at a rate of ˜1012 g s-1. This is one to two orders of magnitude higher than the evaporation rate estimated for HD 209458b and HD 189733b, both of which have exhibited anomalously large Lyman alpha absorption during transit. WASP-70Ab is a sub-Jupiter-mass planet (0.59 MJup, 1.16 RJup) in a 3.713-d orbit around the primary of a spatially resolved, 9-10-Gyr, G4+K3 binary, with a separation of 3.3 arcsec (>=800 au). WASP-84b is a sub-Jupiter-mass planet (0.69 MJup, 0.94 RJup) in an 8.523-d orbit around an active, ˜1-Gyr, early-K dwarf. Of the transiting planets discovered from the ground to date, WASP-84b has the third-longest period. For the active stars WASP-69 and WASP-84, we pre-whitened the radial velocities using a low-order harmonic series. We found that this reduced the residual scatter more than did the oft-used method of pre-whitening with a fit between residual radial velocity and bisector span. The system parameters were essentially unaffected by pre-whitening. [less ▲]Detailed reference viewed: 19 (1 ULg) Segmentation semi-automatique pour le traitement de données 3D denses : application au patrimoine architecturalPoux, Florent; Hallot, Pierre ; Jonlet, Benoît et alin XYZ : la Revue de l'Association Française de Topographie (2014), 141(36), 69-75Detailed reference viewed: 36 (8 ULg) Dietary early-life exposure to contaminated eels does not impair spatial cognitive performances in adult offspring mice as assessed in the Y-maze and the Morris water mazeDridi, Imen; Leroy, Delphine; Guignard, Cedric et alin Nutrition Research (2014), 34(12), 1075-1084Many environmental contaminants are introduced via the diet and may act as neurotoxins and endocrine disrupters, especially influencing growing organisms in early life. The purpose of this study was to ... [more ▼]Many environmental contaminants are introduced via the diet and may act as neurotoxins and endocrine disrupters, especially influencing growing organisms in early life. The purpose of this study was to examine whether dietary exposure of dams to fish naturally contaminated with xenobiotics, especially with polychlorinated biphenyls (PCBs) and heavy metals (e.g. mercury and lead), resulted in cognitive function deficits in adult offspring mice. Daily, four groups of dams (n = 10/group) ingested standard diet plus paste with/without eels, during gestation and lactation, from gestational day (GD) six until post natal day (PND) 21 (weaning). Dams orally ingested a standardized amount of eel (0.8 mgkg-1 d-1) containing the six non-dioxin-like (NDL) PCBs (σ6 NDL-PCBs: 28, 52, 101, 138, 153, and 180) at 0, 85, 216, and 400 ngkg-1 d-1. Results showed that early-life exposure to contaminated eels did not (compared to non-exposed controls) impair immediate working memory in the Y-maze in the offspring assessed at PND 38. Furthermore, it did not significantly impact spatial learning and retention memory as measured in the Morris water maze in adult offspring mice (PND 120-123). Our results suggest that perinatal exposure to contaminated eels does not affect spatial cognitive performances, as assessed by the Y-maze and Morris water maze at adult age. Adverse effects of xenobiotics reported earlier might be camouflaged by beneficial eel constituents, such as n-3 fatty acids. However, additional studies are needed to differentiate between potential positive and negative effects following consumption of food items both rich in nutrients and contaminants. © 2014 Elsevier Inc. [less ▲]Detailed reference viewed: 19 (6 ULg) About the Uniform Hölder Continuity of Generalized Riemann FunctionBastin, Françoise ; Nicolay, Samuel ; Simons, Laurent in Mediterranean Journal of Mathematics (2014)In this paper, we study the uniform H\"{o}lder continuity of the generalized Riemann function~$R_{\alpha,\beta}$ (with $\alpha>1$ and $\beta>0$) defined by $R_{\alpha,\beta}(x)=\sum_{n=1}^{+\infty}\frac ... [more ▼]In this paper, we study the uniform H\"{o}lder continuity of the generalized Riemann function~R_{\alpha,\beta} (with \alpha>1 and \beta>0) defined by \[ R_{\alpha,\beta}(x)=\sum_{n=1}^{+\infty}\frac{\sin(\pi n^\beta x)}{n^\alpha},\quad x\in\mathbb{R},$ using its continuous wavelet transform. In particular, we show that the exponent we find is optimal. We also analyse the behaviour of~$R_{\alpha,\beta}$ as $\beta$ tends to infinity. [less ▲]Detailed reference viewed: 30 (7 ULg) Indicateurs de résultats : entre pilotage et indifférence, quelle appropriation des indicateurs de résultats par des acteurs du système éducatif ?Soetewey, Sabine; Crepin, Françoise in Education & Formation (2014), e-302Detailed reference viewed: 18 (1 ULg) Mafia Practices and Italian Entrepreneurial Activities in the Belgian Food Sector. Research ObjectivesDe Biase, Marco in The European Review of Organised Crime (2014), 1(2), 81-96This research aims to study the social and economic processes which encourage the spread of mafia practices among some Italian entrepreneurs in the Belgian food sector. My working hypothesis is that mafia ... [more ▼]This research aims to study the social and economic processes which encourage the spread of mafia practices among some Italian entrepreneurs in the Belgian food sector. My working hypothesis is that mafia practices are violent and predatory strategies to monopolize the economic market, which rely on the use of heterogeneous and cross-class social networks. In this view, these activities of old and new Italian entrepreneurs in Belgium are not the result of the exportation of mafia methods through migratory or cultural ties, but rather the outcome of a complex economic system of production in which certain Italian entrepreneurs have established profitable enterprises in the legal market using violent modalities of accumulation and specific strategies of relation. This research is developed through an ethnographic approach grounded on biographical collection and on participant observation, which is carried out through direct involvement in commercial activities in the sectors of interest. [less ▲]Detailed reference viewed: 5 (2 ULg) The construction of workers’ rights consciousness through legal intermediations: the case of employment discrimination in BelgiumLejeune, Aude ; Orianne, Jean-François in International Journal of Discrimination and the Law (2014), 14(4), 221-243Through their different encounters with union, court, and government equality agency lawyers, workers report diverse understandings of their personal experience of injustice in the workplace. This paper ... [more ▼]Through their different encounters with union, court, and government equality agency lawyers, workers report diverse understandings of their personal experience of injustice in the workplace. This paper examines workers’ experiences of discrimination and the role legal professionals play in litigating these issues in Belgium. Bringing together legal and rights consciousness studies and the sociology of intermediation and tracking different stages in the construction of discrimination cases, from the moment when a future litigant describes an event as an injustice to the moment when the judge recognises a discriminatory behaviour (or conversely, dismisses a case), we suggest several possible empirical explanations of the way in which interactions with legal intermediaries affect workers’ rights consciousness. Because we refer to socio-legal studies from common law countries, this paper also calls into question how best to import these studies to assist in analysing legal mobilisations and legal consciousness in continental Europe. [less ▲]Detailed reference viewed: 32 (13 ULg) A global analysis of Spitzer and new HARPS data confirms the loneliness and metal-richness of GJ 436 bLanotte, Audrey ; Gillon, Michaël ; Demory, B.-O. et alin Astronomy and Astrophysics (2014), 572Context. GJ 436b is one of the few transiting warm Neptunes for which a detailed characterisation of the atmosphere is possible, whereas its non-negligible orbital eccentricity calls for further ... [more ▼]Context. GJ 436b is one of the few transiting warm Neptunes for which a detailed characterisation of the atmosphere is possible, whereas its non-negligible orbital eccentricity calls for further investigation. Independent analyses of several individual datasets obtained with Spitzer have led to contradicting results attributed to the different techniques used to treat the instrumental effects. Aims. We aim at investigating these previous controversial results and developing our knowledge of the system based on the full Spitzer photometry dataset combined with new Doppler measurements obtained with the HARPS spectrograph. We also want to search for additional planets. Methods. We optimise aperture photometry techniques and the photometric deconvolution algorithm DECPHOT to improve the data reduction of the Spitzer photometry spanning wavelengths from 3-24 {\mu}m. Adding the high precision HARPS radial velocity data, we undertake a Bayesian global analysis of the system considering both instrumental and stellar effects on the flux variation. Results. We present a refined radius estimate of RP=4.10 +/- 0.16 R_Earth, mass MP=25.4 +/- 2.1 M_Earth and eccentricity e= 0.162 +/- 0.004 for GJ 436b. Our measured transit depths remain constant in time and wavelength, in disagreement with the results of previous studies. In addition, we find that the post-occultation flare-like structure at 3.6 {\mu}m that led to divergent results on the occultation depth measurement is spurious. We obtain occultation depths at 3.6, 5.8, and 8.0 {\mu}m that are shallower than in previous works, in particular at 3.6 {\mu}m. However, these depths still appear consistent with a metal-rich atmosphere depleted in methane and enhanced in CO/CO2, although perhaps less than previously thought. We find no evidence for a potential planetary companion, stellar activity, nor for a stellar spin-orbit misalignment. [ABRIDGED] [less ▲]Detailed reference viewed: 32 (4 ULg) Characteristics and ceramic properties of clayey materials from Amezmiz region (Western High Atlas, Morocco)Daoudi, Lahcen; El Boudour El Idrissi, Hicham ; Saadi, Latifa et alin Applied Clay Science (2014)Five clayey materials from two quarries located in the Amezmiz region (Morocco) were sampled and investigated for their physical, chemical, mineralogical and thermal characteristics to evaluate their ... [more ▼]Five clayey materials from two quarries located in the Amezmiz region (Morocco) were sampled and investigated for their physical, chemical, mineralogical and thermal characteristics to evaluate their potential suitability as raw materials in various ceramic applications. Physical properties were identified by particle size distribution, consistency limits and total organic content. Chemical, mineralogical, and thermal properties were investigated by XRF, XRD, and TG/DTA techniques, respectively. A common raw material in pottery manufacturing of Morocco was used as reference sample (REF). Results show that the main oxides in the samples were SiO2, Al2O3, and Fe2O3, whereas the other oxides were present only in small quantities. Quartz, illite and vermiculite were present as dominant mineral phases with minor kaolinite, calcite and smectite. The results showed that three of the studied clayey materials have adequate characteristics for the production of structural ceramics. However, for the two other clays it is necessary to add more plastic clays to enhance the workability. [less ▲]Detailed reference viewed: 44 (16 ULg) Confiance politique et institutions internationales. Les perceptions de l'efficacité, de la légitimité et de la démocratie par des jeunesGrandjean, Geoffrey in Revue de la Faculté de Droit de l'Université de Liège (2014), 3Detailed reference viewed: 15 (2 ULg) Clustering and segregation in driven granular fluidsOpsomer, Eric ; Vandewalle, Nicolas ; Noirhomme, Martial et alin European Physical Journal E -- Soft Matter (2014)In microgravity, the successive inelastic collisions in a granular gas can lead to a dynamical clustering of the particles. This transition depends on the filling fraction of the system, the restitution ... [more ▼]In microgravity, the successive inelastic collisions in a granular gas can lead to a dynamical clustering of the particles. This transition depends on the filling fraction of the system, the restitution of the used materials and on the size of the particles. We report simulations of driven bi-disperse gas made of small and large spheres. The size as well as the mass difference imply a strong modification in the kinematic chain of collisions and therefore alter significantly the formation of a cluster. Moreover, the different dynamical behaviors can also lead to a demixing of the system, adding a few small particles in a gas of large ones can lead to a partial clustering of the taller type. We realized a detailed phase diagram recovering the encountered regimes and developed a theoretical model predicting the possibility of dynamical clustering in binary systems. [less ▲]Detailed reference viewed: 9 (0 ULg) Physical and bacterial controls on inorganic nutrients and dissolved organic carbon during a sea ice growth and decay experimentZhou, Jiayun ; Delille, Bruno ; Kaartokallio, Hermanni et alin Marine Chemistry (2014), 166We investigated how physical incorporation, brine dynamics and bacterial activity regulate the distribution of inorganic nutrients and dissolved organic carbon (DOC) in artificial sea ice during a 19-day ... [more ▼]We investigated how physical incorporation, brine dynamics and bacterial activity regulate the distribution of inorganic nutrients and dissolved organic carbon (DOC) in artificial sea ice during a 19-day experiment that included periods of both ice growth and decay. The experiment was performed using two series of mesocosms: the first consisted of seawater and the second consisted of seawater enriched with humic-rich river water. We grew ice by freezing the water at an air temperature of -14 °C for 14 days after which ice decay was induced by increasing the air temperature to -1 °C. Using the ice temperatures and bulk ice salinities, we derived the brine volume fractions, brine salinities and Rayleigh numbers. The temporal evolution of these physical parameters indicate that there was a succession of 3 stages in the brine dynamics: forced-convection, followed by bottom convection during ice growth, and then brine stratification during ice decay. The major findings are: (1) the incorporation of dissolved compounds (nitrate, nitrite, ammonium, phosphate, silicate, and DOC) into the sea ice was not conservative (relative to salinity) during ice growth. Brine convection clearly influenced the incorporation of the dissolved compounds, since the non-conservative behavior of the dissolved compounds was particularly pronounced in the absence of brine convection. (2) Bacterial activity further regulated nutrient availability in the ice: ammonium and nitrite accumulated as a result of remineralization processes, although bacterial production was too low to induce major changes in DOC concentrations. (3) Different forms of DOC have different properties and hence incorporation efficiencies. In particular, the terrestrially-derived DOC from the river water was less efficiently incorporated into sea ice than the DOC in the seawater. Therefore the main factors regulating the distribution of the dissolved compounds within sea ice are clearly a complex interaction of brine dynamics, biological activity and in the case of dissolved organic matter, the physico-chemical properties of the dissolved constituents themselves. [less ▲]Detailed reference viewed: 44 (3 ULg) Double thermoresponsive di- and triblock copolymers based on N-vinylcaprolactam and N-vinylpyrrolidone: synthesis and comparative study of solution behaviourKermagoret, Anthony ; Mathieu, Kevin ; Thomassin, Jean-Michel et alin Polymer Chemistry (2014), 5(22), 6534-6544Poly(N-vinylcaprolactam) (PNVCL) and poly(N-vinylpyrrolidone) (PNVP) are water soluble polymers of interest especially in the biomedical field. Moreover, PNVCL is characterized by a lower critical ... [more ▼]Poly(N-vinylcaprolactam) (PNVCL) and poly(N-vinylpyrrolidone) (PNVP) are water soluble polymers of interest especially in the biomedical field. Moreover, PNVCL is characterized by a lower critical solution temperature close to 36 °C in water, which makes it useful for the design of thermoresponsive systems. In this context, we used the cobalt-mediated radical polymerization (CMRP) and reaction coupling (CMRC) for synthesizing a series of well-defined NVCL and NVP-based copolymers, including statistical copolymers as well as double thermoresponsive diblocks and triblocks. Dynamic light scattering and turbidimetry analyses highlighted the crucial impact of the copolymer composition and architecture on the cloud point temperature (TCP) of each segment and also their influence on the multistep assembly behaviour of block copolymers. Addition of NaCl enabled us to adjust the inter-TCP range of the di- and triblock in which selective precipitation of one block and self-assembly of the copolymer were favoured. Overall, data presented here provide a basis for the synthesis of a broad range of NVCL/NVP based copolymer architectures with a tunable thermal response in water. [less ▲]Detailed reference viewed: 27 (7 ULg) Long-term evolution and seasonal modulation of methanol above Jungfraujoch (46.5°N, 8.0°E): Optimisation of the retrieval strategy, comparison with model and independant observationsBader, Whitney ; Stavrakou, T; Muller, J-F et alin Atmospheric Measurement Techniques (2014), 7Methanol (CH3OH) is the second most abundant organic compound in the Earth's atmosphere after methane. In this work, we present the first long-term time series of methanol total, lower tropospheric and ... [more ▼]Methanol (CH3OH) is the second most abundant organic compound in the Earth's atmosphere after methane. In this work, we present the first long-term time series of methanol total, lower tropospheric and upper tropospheric-lower stratospheric partial columns derived from the analysis of high resolution Fourier transform infrared solar spectra recorded at the Jungfraujoch station (46.5° N, 3580 m a.s.l.). The retrieval of methanol is very challenging due to strong absorptions of ozone in the region of the selected υ8 band of CH3OH. Two wide spectral intervals have been defined and adjusted in order to maximize the information content. Methanol does not exhibit a significant trend over the 1995–2012 time period, but a strong seasonal modulation characterized by maximum values and variability in June–July, minimum columns in winter and a peak-to-peak amplitude of 130%. In situ measurements performed at the Jungfraujoch and ACE-FTS occultations give similar results for the methanol seasonal variation. The total and lower tropospheric columns are also compared with IMAGESv2 model simulations. There is no systematic bias between the observations and IMAGESv2 but the model underestimates the peak-to-peak amplitude of the seasonal modulations. [less ▲]Detailed reference viewed: 68 (32 ULg) An Investigation of the Late Excitatory Potentials in the Hand following Transcranial Magnetic Stimulation in Early Alzheimer's Disease.Balla, christina; PEPIN, Jean-Louis ; MAERTENS DE NOORDHOUT, Alain in Dementia & Geriatric Cognitive Disorders (2014), 4BACKGROUND: Recent neuroimaging studies in humans support the clinical observations that the motor cortex is affected early in the course of Alzheimer's disease (AD). PATIENTS AND METHODS: We measured the ... [more ▼]BACKGROUND: Recent neuroimaging studies in humans support the clinical observations that the motor cortex is affected early in the course of Alzheimer's disease (AD). PATIENTS AND METHODS: We measured the silent period (SP) induced by transcranial magnetic stimulation in AD patients in the very early stage of the disease, and we explored whether and in which way the pharmacologic manipulation of the cholinergic system could modify it. RESULTS: An increase in the duration of the SP was observed in AD patients in the early stage in comparison to controls. After 2 months of treatment with donepezil, the duration did not differ significantly from that of normal subjects. The results of our study show a fragmentation and an enlargement of the SP in the presence of multiple late excitatory potentials (LEPs) in early untreated AD patients. These LEPs were also modulated by donepezil. CONCLUSIONS: The results suggest an early functional impairment of cholinergic neurotransmission in AD. The disturbance in acetylcholine output in early AD leads to a decrease in excitability of the motor system. [less ▲]Detailed reference viewed: 26 (2 ULg) Allelopathic and autotoxicity effects of barley (Hordeum vulgare L. ssp. vulgare) root exudatesBouhaouel, Imen; Gfeller, Aurélie; Fauconnier, Marie-Laure et alin BioControl (2014), Online FirstThe allelopathic activity of barley (Hordeum vulgare L. ssp. vulgare) root exudates was studied by comparing their effects on seedling establishment in barley itself and in two weed species, Bromus ... [more ▼]The allelopathic activity of barley (Hordeum vulgare L. ssp. vulgare) root exudates was studied by comparing their effects on seedling establishment in barley itself and in two weed species, Bromus diandrus Roth. and Lolium rigidum Gaudin, using an original laboratory protocol, named ‘seed-after-seed’. In this protocol, the donor and the receiver species of watersoluble allelochemicals are grown one after the other in the same dishes, in conditions reducing resource competition between both species. Growth of all receptive species (weeds and barley) was inhibited in a dose-dependent manner, when using increasing barley seed densities (0, 8, 19 and 25 seeds per Petri dish). In our conditions, the barley varieties and landraces exhibited different allelopathic activities against weeds or barley. The allelopathic potential of the barley root exudates was also dependent on the receiver species. Indeed, the released allelochemicals proved to be more toxic against the weed plants than on barley itself. Furthermore, the toxicity of the allelochemicals increased after their release by roots, between day 0 and day 6. These allelochemicals might contribute to the plant community dynamics and their usefulness as bio-herbicides deserves further consideration. [less ▲]Detailed reference viewed: 23 (1 ULg) Soil charcoal to assess the impacts of past human disturbances on tropical forestsVleminckx, Jason; Morin-Rivat, Julie ; Biwolé, Achille et alin PLoS ONE (2014)The canopy of many central African forests is dominated by light-demanding tree species that do not regenerate well under themselves. The prevalence of these species might result from ancient slash-and ... [more ▼]The canopy of many central African forests is dominated by light-demanding tree species that do not regenerate well under themselves. The prevalence of these species might result from ancient slash-and-burn agricultural activities that created large openings, while a decline of these activities since the colonial period could explain their deficit of regeneration. To verify this hypothesis, we compared soil charcoal abundance, used as a proxy for past slash-and-burn agriculture, and tree species composition assessed on 208 rainforest 0.2 ha plots located in three areas from Southern Cameroon. Species were classified in regeneration guilds (pioneer, non-pioneer light-demanding, shade-bearer) and characterized by their woodspecific gravity, assumed to reflect light requirement. We tested the correlation between soil charcoal abundance and: (i) the relative abundance of each guild, (ii) each species and family abundance and (iii) mean wood-specific gravity. Charcoal was found in 83% of the plots, indicating frequent past forest fires. Radiocarbon dating revealed two periods of fires: ‘‘recent’’ charcoal were on average 300 years old (up to 860 BP, n = 16) and occurred in the uppermost 20 cm soil layer, while ‘‘ancient’’ charcoal were on average 1900 years old (range: 1500 to 2800 BP, n = 43, excluding one sample dated 9400 BP), and found in all soil layers. While we expected a positive correlation between the relative abundance of light demanding species and charcoal abundance in the upper soil layer, overall there was no evidence that the current heterogeneity in tree species composition can be explained by charcoal abundance in any soil layer. The absence of signal supporting our hypothesis might result from (i) a relatively uniform impact of past slash-and-burn activities, (ii) pedoturbation processes bringing ancient charcoal to the upper soil layer, blurring the signal of centuries-old Human disturbances, or (iii) the prevalence of other environmental factors on species composition. [less ▲]Detailed reference viewed: 23 (8 ULg) Vitamin D status in critically ill patients: back to basics!ROUSSEAU, Anne-Françoise ; CAVALIER, Etienne in Critical Care (2014), 18(6), 611Detailed reference viewed: 12 (1 ULg) Ultrasonographic assessment of uterine involution and ovarian activity in West African Sahelian goats.Zongo, Moussa; Traore, Boureima; Ababneh, Mohammed Mahmoud et alin Journal of Veterinary Medicine and Animal Health (2014), 7(2), 71-76Detailed reference viewed: 28 (5 ULg) Umbilical cord fibroblastsZEDDOU M; RELIC, Biserka ; Malaise, Michel in Rheumatology (2014)Detailed reference viewed: 6 (1 ULg) Survey of Artificial Insemination Practices in AlgeriaSouames, Samir; Hanzen, Christian ; Detilleux, Johann et alin Research Journal for Veterinary Practitioner (2014), 3(1), 1-9Detailed reference viewed: 116 (13 ULg) Recent Northern Hemisphere stratospheric HCl increase due to atmospheric circulation changesMahieu, Emmanuel ; Chipperfield, M. P.; Notholt, J. et alin Nature (2014), 515(7525), 104--107The abundance of chlorine in the Earth’s atmosphere increased considerably during the 1970s to 1990s, following large emissions of anthropogenic long-lived chlorine-containing source gases, notably the ... [more ▼]The abundance of chlorine in the Earth’s atmosphere increased considerably during the 1970s to 1990s, following large emissions of anthropogenic long-lived chlorine-containing source gases, notably the chlorofluorocarbons. The chemical inertness of chlorofluorocarbons allows their transport and mixing throughout the troposphere on a global scale[1], before they reach the stratosphere where they release chlorine atoms that cause ozone depletion[2]. The large ozone loss over Antarctica[3] was the key observation that stimulated the definition and signing in 1987 of the Montreal Protocol, an international treaty establishing a schedule to reduce the production of the major chlorine- and bromine-containing halocarbons. Owing to its implementation, the near-surface total chlorine concentration showed a maximum in 1993, followed by a decrease of half a per cent to one per cent per year[4], in line with expectations. Remote-sensing data have revealed a peak in stratospheric chlorine after 1996[5], then a decrease of close to one per cent per year[6,7], in agreement with the surface observations of the chlorine source gases and model calculations[7]. Here we present ground-based and satellite data that show a recent and significant increase, at the 2σ level, in hydrogen chloride (HCl), the main stratospheric chlorine reservoir, starting around 2007 in the lower stratosphere of the Northern Hemisphere, in contrast with the ongoing monotonic decrease of near-surface source gases. Using model simulations, we attribute this trend anomaly to a slowdown in the Northern Hemisphere atmospheric circulation, occurring over several consecutive years, transporting more aged air to the lower stratosphere, and characterized by a larger relative conversion of source gases to HCl. This short-term dynamical variability will also affect other stratospheric tracers and needs to be accounted for when studying the evolution of the stratospheric ozone layer. [less ▲]Detailed reference viewed: 31 (11 ULg) The Robust Economic Statistical Design of the Hotelling’s T^2 ChartFaraz, Alireza ; Chalaki, Kamyar; Saniga, Erwin et alin Communications in Statistics : Theory & Methods (2014)Economic statistical designs aim at minimizing the cost of process monitoring when a specific scenario or a set of estimated process and cost parameters is given. However, in practical situations the ... [more ▼]Economic statistical designs aim at minimizing the cost of process monitoring when a specific scenario or a set of estimated process and cost parameters is given. However, in practical situations the process may be affected by more than one scenario which may lead to severe cost penalties for upsetting the true scenario. This paper presents the robust economic statistical design (RESD) of the T^2 chart to reduce the monetary losses when there are multiple distinct scenarios. The genetic algorithm optimization method is employed here to minimize the total expected monitoring cost across all distinct scenarios. Through two numerical examples the proposed method is illustrated. Simulation studies indicate that the robust economic statistical designs should be encouraged in practice. [less ▲]Detailed reference viewed: 37 (1 ULg) Southern Massive Stars at High Angular Resolution: Observational Campaign and Companion DetectionSana, H.; Le Bouquin, J.-B.; Lacour, S. et alin Astrophysical Journal Supplement Series (2014), 215Multiplicity is one of the most fundamental observable properties of massive O-type stars and offers a promising way to discriminate between massive star formation theories. Nevertheless, companions at ... [more ▼]Multiplicity is one of the most fundamental observable properties of massive O-type stars and offers a promising way to discriminate between massive star formation theories. Nevertheless, companions at separations between 1 and 100 milliarcsec (mas) remain mostly unknown due to intrinsic observational limitations. At a typical distance of 2 kpc, this corresponds to projected ph [less ▲]Detailed reference viewed: 10 (3 ULg) Prognosis of HPV-positive head and neck cancers : implication of smoking and immunosuppressionDuray, Anaëlle; LACREMANS, Daniel ; Demoulin, Stéphanie et alin Advances in Cellular and Molecular Otolaryngology (2014), 2Detailed reference viewed: 9 (2 ULg) Origin and immunoescape of uterine cervical cancerVan hede, Dorien ; Langers, Inge ; DELVENNE, Philippe et alin Presse Médicale (2014)Human papillomavirus associated uterine cervical cancer is an important public health problem since it is classified as the fourth most common cancer in women worldwide with more than 500 000 recorded ... [more ▼]Human papillomavirus associated uterine cervical cancer is an important public health problem since it is classified as the fourth most common cancer in women worldwide with more than 500 000 recorded cases. This review is focused on where and why HPV infection induces cervical cancers and how this virus avoids the host immune response. Immunological therapeutic approaches are also addressed. [less ▲]Detailed reference viewed: 28 (2 ULg) Searching for faint companions with VLTI/PIONIER. II. 92 main sequence stars from the Exozodi surveyMarion, Lindsay ; Absil, Olivier ; Ertel, S. et alin Astronomy and Astrophysics (2014), 570Context. The Exozodi survey aims to determine the occurrence rate of bright exozodiacal discs around nearby main sequence stars using infrared interferometry. Although the Exozodi survey targets have been ... [more ▼]Context. The Exozodi survey aims to determine the occurrence rate of bright exozodiacal discs around nearby main sequence stars using infrared interferometry. Although the Exozodi survey targets have been carefully selected to avoid the presence of binary stars, the results of this survey can still be biased by the presence of unidentified stellar companions.