References of "Scientific journals"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailDevelopment of a LC-MS/MS analytical method for the simultaneous measurement of aldehydes coming from polyunsaturated fatty acids degradation in animal feed
Douny, Caroline ULg; Bayram, Pinar; Brose, François ULg et al

in Drug Testing and Analysis (2016), 8(5-6), 458-464

Knowing that polyunsaturated fatty acids can lead to the formation of potentially toxic aldehydes as secondary oxidation products, an analytical method using liquid chromatography coupled to tandem mass ... [more ▼]

Knowing that polyunsaturated fatty acids can lead to the formation of potentially toxic aldehydes as secondary oxidation products, an analytical method using liquid chromatography coupled to tandem mass spectrometry detection (LC-MS/MS) has been developed to evaluate the concentration of eight aldehydes in animal feed: malondialdehyde (MDA), 4-hydroxy-2-nonenal (4-HNE), 4-hydroxy-2-hexenal (4-HHE), crotonaldehyde (CRT), benzaldehyde (BNZ), hexanal (HXL), 2,4-nonadienal and 2,4-decadienal. The developed method has been validated according to the criteria and procedure described in international standards. The evaluated parameters were: specificity/selectivity, recovery, precision, accuracy, uncertainty, limits of detection and quantification, using the concept of accuracy profiles. These parameters have been determined during experiments realized on 3 different days with grounded Kellogg’s® Corn Flakes® cereals as model matrix for animal feed and spiked at different levels of concentration. Malondialdehyde, 4-HHE, 4-HNE, crotonaldehyde, benzaldehyde and hexanal can be analysed in the same run in animal feed with a very good accuracy, with recovery rates ranging from 86 to 109% for a working range going from 0.16 to 12.50 mg/kg. Concerning 2,4-nonadienal and 2,4-decadienal, their analysis can be realized as well but in a limited range of concentration and with a limited accuracy. Indeed, recovery rates ranged between 54 and 114% and coefficient of variation for the intermediate precision between 11 and 25% for these two compounds. [less ▲]

Detailed reference viewed: 17 (2 ULg)
Full Text
Peer Reviewed
See detailAbout the multifractal nature of Cantor's bijection: Bounds for the Hölder exponent at almost every irrational point
Nicolay, Samuel ULg; Simons, Laurent

in Fractals (2016), 24(2), 1650014-1-1650014-9

In this note, we investigate the regularity of Cantor’s one-to-one mapping between the irrational numbers of the unit interval and the irrational numbers of the unit square. In particular, we explore the ... [more ▼]

In this note, we investigate the regularity of Cantor’s one-to-one mapping between the irrational numbers of the unit interval and the irrational numbers of the unit square. In particular, we explore the fractal nature of this map by showing that its Hölder regularity lies between 0.35 and 0.72 almost everywhere (with respect to the Lebesgue measure). [less ▲]

Detailed reference viewed: 24 (9 ULg)
Full Text
Peer Reviewed
See detailLa démarche communautaire, quel que soit le secteur, fait-elle toujours santé ?
Absil, Gaëtan ULg

in Politiques Sociales (2016), 1 & 2(76e année), 128-145

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailAuditory evoked potential audiograms in post-settlement stage individuals of coral reef fishes
Colleye, Orphal ULg; Kever, Loïc ULg; Lecchini, David et al

in Journal of Experimental Marine Biology & Ecology (2016), 483

Detailed reference viewed: 18 (4 ULg)
Full Text
Peer Reviewed
See detailThe scent of love: how important are semiochemicals in the sexual behavior of lady beetles?
Fassotte, Bérénice ULg; Francis, Frédéric ULg; Verheggen, François ULg

in Journal of Pest Science (2016), 89(2), 347-358

Chemical signals are involved in the courtship behavior of many invertebrate and vertebrate species. Lady beetles are no exception to this rule; a significant number of published reports highlight the ... [more ▼]

Chemical signals are involved in the courtship behavior of many invertebrate and vertebrate species. Lady beetles are no exception to this rule; a significant number of published reports highlight the role of cuticular chemicals involved in the reproduction of lady beetles, including gender recognition. Recent data have also demonstrated the presence of a volatile female sex pheromone that facilitates male attraction in some species. Here, we present a synthetic overview of the current knowledge about the sexual behavior of lady beetles and associated chemicals for which the function and identification have been provided. Because lady beetles are often reared as biological control agents, the chemical cues involved in their sexual behavior could be used as components in integrated management approaches against soft-bodied hemipterans. In conclusion, this review provides new perspectives and potential developments for sustainable insect management mainly based on the semiochemicals involved in the sexual behavior of lady beetles. A better understanding of these chemical signals would help maximize their presence in areas where their predatory behavior is requested, as a result of the application of formulations inducing behavioral manipulation. [less ▲]

Detailed reference viewed: 75 (20 ULg)
Full Text
See detailLa recherche en Belgique. Transitions. Unité de recherches sur le Moyen Âge tardif & la première Modernité (Université de Liège)
Delfosse, Annick ULg; Henrard, Nadine ULg; Morato, Nicola ULg

in Lettre du Réseau (Réseau des Médiévistes belges de Langue française) (2016), 10

Detailed reference viewed: 40 (2 ULg)
Full Text
Peer Reviewed
See detailL'incidence de l'annulation d'un contrat de vente sur le prêt finançant cette vente
Englebert, Marine ULg

in Revue Générale de Droit Civil Belge = Tijdschrift voor Belgisch Burgerlijk (2016), (6), 347-353

Detailed reference viewed: 18 (1 ULg)
Full Text
Peer Reviewed
See detailPrognostic assessment in COPD without lung function: the B-AE-D indices.
Boeck, Lucas; Soriano, Joan B.; Brusse-Keizer, Marjolein et al

in The European respiratory journal (2016), 47(6), 1635-44

Several composite markers have been proposed for risk assessment in chronic obstructive pulmonary disease (COPD). However, choice of parameters and score complexity restrict clinical applicability. Our ... [more ▼]

Several composite markers have been proposed for risk assessment in chronic obstructive pulmonary disease (COPD). However, choice of parameters and score complexity restrict clinical applicability. Our aim was to provide and validate a simplified COPD risk index independent of lung function.The PROMISE study (n=530) was used to develop a novel prognostic index. Index performance was assessed regarding 2-year COPD-related mortality and all-cause mortality. External validity was tested in stable and exacerbated COPD patients in the ProCOLD, COCOMICS and COMIC cohorts (total n=2988).Using a mixed clinical and statistical approach, body mass index (B), severe acute exacerbations of COPD frequency (AE), modified Medical Research Council dyspnoea severity (D) and copeptin (C) were identified as the most suitable simplified marker combination. 0, 1 or 2 points were assigned to each parameter and totalled to B-AE-D or B-AE-D-C. It was observed that B-AE-D and B-AE-D-C were at least as good as BODE (body mass index, airflow obstruction, dyspnoea, exercise capacity), ADO (age, dyspnoea, airflow obstruction) and DOSE (dyspnoea, obstruction, smoking, exacerbation) indices for predicting 2-year all-cause mortality (c-statistic: 0.74, 0.77, 0.69, 0.72 and 0.63, respectively; Hosmer-Lemeshow test all p>0.05). Both indices were COPD specific (c-statistic for predicting COPD-related 2-year mortality: 0.87 and 0.89, respectively). External validation of B-AE-D was performed in COCOMICS and COMIC (c-statistic for 1-year all-cause mortality: 0.68 and 0.74; c-statistic for 2-year all-cause mortality: 0.65 and 0.67; Hosmer-Lemeshow test all p>0.05).The B-AE-D index, plus copeptin if available, allows a simple and accurate assessment of COPD-related risk. [less ▲]

Detailed reference viewed: 15 (1 ULg)
Full Text
Peer Reviewed
See detailA review on the use of sensors to monitor cattle jaw movements and behavior when grazing
Andriamandroso, Andriamasinoro ULg; Bindelle, Jérôme ULg; Mercatoris, Benoît ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016), 20

Precision Livestock Farming (PLF) is spreading rapidly in intensive cattle farms. It is based on the monitoring of individuals using different kinds of sensors. Applied to grazing animals, PLF is mainly ... [more ▼]

Precision Livestock Farming (PLF) is spreading rapidly in intensive cattle farms. It is based on the monitoring of individuals using different kinds of sensors. Applied to grazing animals, PLF is mainly based on the recording of three parameters: the location, the posture and the movements of the animal. Until now, several techniques have been used to discriminate grazing and ruminating behaviors with accuracies over 90% on average, when compared to observations, providing valuable tools to improve the management of pasture and grazing animals. However, bites and jaw movements are still overlooked, even though they are of utmost importance to assess the animal grazing strategies for various pasture types and develop future techniques allowing better estimation of their intake. The goal of this review is to explore the possibility of monitoring the individual jaw movements and the differentiation of bites in grazing animals. For this purpose, (1) the mechanisms of forage intake in cattle are explained briefly in order to understand the movements performed by the cow, especially during grazing, (2) the various sensors that have been proposed to monitor jaw movements of ruminants such as mechanical sensors (pressure sensors), acoustic sensors (microphone) and electromyography sensors are compared and (3) finally the relationship between jaw movements, biting behavior and forage intake is discussed. The review clearly demonstrated the abilities of mechanical, acoustic and electromyography sensors to classify the difference types of jaw movements. However, it also indicated a wide range of accuracies and different observation windows required to reach these accuracies when compared to the observed movement. This classification purpose could lead to a better detection of more specific behavior, e.g. bite detection, and their exact location on pasture. [less ▲]

Detailed reference viewed: 201 (21 ULg)
Full Text
Peer Reviewed
See detailA review of glucosamine for knee osteoarthritis: why patented crystalline glucosamine sulfate should be differentiated from other glucosamines to maximize clinical outcomes
Kucharz, E.J.; Kovalenko, V.; Szanto, S. et al

in Current Medical Research & Opinion (2016), 32(6), 997-1004

The European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis (ESCEO) treatment algorithm for knee osteoarthritis (OA) recommends symptomatic slow-acting drugs for ... [more ▼]

The European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis (ESCEO) treatment algorithm for knee osteoarthritis (OA) recommends symptomatic slow-acting drugs for osteoarthritis (SYSADOAs) first line for the medium to long term management of OA, due to their ability to control pain, improve function, and delay joint structural changes. Among SYSADOAs, glucosamine is probably the most widely used intervention. In the present review of glucosamine for knee OA, we have investigated whether the evidence is greater for the patented crystalline glucosamine sulfate (pCGS) preparation (Rottapharm/Meda) than for other glucosamine formulations. Glucosamine is actually widely available in many forms, as the prescription-grade pCGS preparation, generic and over-the-counter formulations of glucosamine sulfate (GS) and food supplements containing glucosamine hydrochloride (GH), which vary substantially in molecular form, pharmaceutical formulation and dose regimens. Only pCGS is given as a highly bioavailable once daily dose (1500mg) with a proven pharmacological effect. pCGS consistently reaches the plasma levels of around 10 lM required to inhibit interleukin-1 induced expression of genes involved in the pathophysiology of joint inflammation and tissue destruction, compared with sub-therapeutic levels achieved with GH. It is evident, from careful consideration of the evidence base, that only the pCGS formulation of glucosamine reliably provides an effect size on pain that is higher than that of paracetamol and equivalent to that provided by non-steroidal antiinflammatory drugs. In comparison, the effect size on pain of non-crystalline GS preparations and GH from randomized controlled trials is repeatedly demonstrated to be zero. In addition, there is evidence that chronic administration of pCGS has disease-modifying effects, with a reduction in the need for total joint replacement surgery lasting for at least 5 years after treatment cessation. Consequently, the pCGS preparation (Rottapharm/Meda) is the logical choice, with demonstrated medium-term control of pain and lasting impact on disease progression. [less ▲]

Detailed reference viewed: 31 (10 ULg)
Full Text
Peer Reviewed
See detailLoss of treatment benefit when heroin-assisted treatment is stopped after 12 month
Demaret, Isabelle ULg; Quertemont, Etienne ULg; Litran, Géraldine et al

in Journal of Substance Abuse Treatment (2016), 69

Purpose: In 2013, during a recent heroin-assisted treatment trial, participants in heroinassisted treatment (HAT) decreased significantly more their street heroin use than participants in oral methadone ... [more ▼]

Purpose: In 2013, during a recent heroin-assisted treatment trial, participants in heroinassisted treatment (HAT) decreased significantly more their street heroin use than participants in oral methadone treatment. After the trial, HAT was discontinued. To examine whether the treatment benefits were sustained three months after the trial, the use of street heroin by the participants was analysed in a follow-up study. Results: At the follow-up assessment, street heroin use increased in the experimental group. The two groups no longer showed a significant difference (p=0.55) in the level of street heroin use. Conclusion: A predetermined and forced end of HAT was followed by a significant increase in the level of street level use. [less ▲]

Detailed reference viewed: 7 (1 ULg)
Full Text
Peer Reviewed
See detailCover Letter of The journal of Biological Chemistry
Sautrey, Guillaume; El Khoury, M; Dos Giros, A et al

in The journal of Biological Chemistry (2016), 291(26),

Detailed reference viewed: 17 (0 ULg)
Full Text
Peer Reviewed
See detailAssessment of muscle mass, muscle strength and physical performance in clinical practice: An international survey
Bruyère, Olivier ULg; Beaudart, Charlotte ULg; Reginster, Jean-Yves ULg et al

in European Geriatric Medicine (2016), 7(3), 243-6

Introduction: Several tools are available for the assessment of muscle mass, muscle strength and physical performance in clinical research. However, few data are available on the usage of these tools in ... [more ▼]

Introduction: Several tools are available for the assessment of muscle mass, muscle strength and physical performance in clinical research. However, few data are available on the usage of these tools in clinical practice. Methods: This study aimed to assess their usage by means of a large online international survey. Since sarcopenia is a specific condition where the assessment of muscle mass, muscle strength and physical performance is important, the survey also assessed the tools used for the diagnosis of this geriatric syndrome. Results: The survey was completed by 255 clinicians from 55 countries across 5 continents. Among these clinicians with geriatrics, rheumatology and endocrinology as major fields of interest, 53.3% assess muscle mass in daily practice, 54.5% muscle strength and 71.4% physical performance. However, the tools used are very different and no single tool is used by all clinicians. The tools and the cut-off values used by clinicians to diagnose sarcopenia are also heterogeneous. Conclusion: Because some tools used for the assessment of muscle mass, muscle strength or physical performance in daily practice are less validated than others, a greater awareness from the clinicians of the importance of using appropriate tools is needed [less ▲]

Detailed reference viewed: 61 (10 ULg)
Full Text
Peer Reviewed
See detailBHS guidelines for the treatment of large granular lymphocyte and cronic prolymphocytic leukaemias
Springael, C.; Delrieu, V.; Wu, K.L. et al

in Belgian Journal of Hematology (2016), 7

Large granular lymphocyte and prolymphocytic leukaemias are rare chronic lymphoproliferative disorders. Large granular lymphocyte leukaemias consist of indolent disorders such as T-cell large granular ... [more ▼]

Large granular lymphocyte and prolymphocytic leukaemias are rare chronic lymphoproliferative disorders. Large granular lymphocyte leukaemias consist of indolent disorders such as T-cell large granular lymphocyte and chronic lymphoproliferative disorder of natural killer cells and the very rare but aggressive natural killer cell leukaemia. Treatment of the indolent large granular lymphocyte leukaemias is necessary in case of symptomatic cytopaenias or non-haematological autoimmune disorders. First line therapy of these two disorders is based on three immunosuppressive drugs: methotrexate, cyclophosphamide and cyclosporine A. Aggressive natural killer cell leukaemia needs an L-asparaginase containing regimen as induction followed by allogeneic stem cell transplantation to prolong remission. T-cell prolymphocytic leukaemia always follows an aggressive course even after an indolent onset. The optimal treatment strategy should exist of remission induction with alemtuzumab intravenously followed by autologous or allogeneic stem cell transplantation. Treatment indications for B-cell prolymphocytic leukaemia follow the criteria described by the chronic lymphocytic leukaemia guidelines. After induction with fludarabine, cyclophosphamide, rituximab or bendamustine in patients without a p53 mutation and/or a 17p deletion and alemtuzumab in case of a p53 mutation and/or a 17p deletion, stem cell transplantation must be considered. [less ▲]

Detailed reference viewed: 22 (1 ULg)
Full Text
Peer Reviewed
See detailPLANET TOPERS: Planets, Tracing the Transfer, Origin, Preservation, and Evolution of their ReservoirS
Dehant, Véronique ULg; Kabamba Baludikay, Blaise ULg; Beghin, Jérémie ULg et al

in Origins of Life & Evolution of the Biosphere (2016), DOI 10.1007/s11084-016-9488

Detailed reference viewed: 45 (14 ULg)
Full Text
Peer Reviewed
See detailCompte rendu de Voltaire, Œuvres complètes, vol. 51A : Recueil des facéties parisiennes, éd. dirigée par Nicholas Cronk
Daubercies, Laurence ULg

in COnTEXTES : Revue de Sociologie de la Littérature (2016)

Detailed reference viewed: 8 (0 ULg)
Full Text
See detailSur l'emploi de la lettre x en mathématiques
Bair, Jacques ULg

in Losanges (2016), 33

La notation x est souvent perçue comme étant emblématique en mathématiques. Nous montrons dans cet article comment elle est apparue historiquement et recensons des situations d'enseignement au cours ... [more ▼]

La notation x est souvent perçue comme étant emblématique en mathématiques. Nous montrons dans cet article comment elle est apparue historiquement et recensons des situations d'enseignement au cours desquelles un étudiant peut la rencontrer. Ensuite, nous évoquons un travail didactique du réputé mathématicien K. Menger (1902-1985) sur cette question, puis nous donnons en annexe une brève biographie de cet auteur autrichien. [less ▲]

Detailed reference viewed: 12 (0 ULg)
Full Text
See detailLe règlement 650/2012 relatif aux successions internationales Aperçu et principes généraux
Wautelet, Patrick ULg; Mary, Julie

in Journal des Tribunaux (2016), 135(6651),

Ce texte dresse un panorama général du Règlement successions en s'appuyant sur quatre questions 1°) Quand et à quelles questions le règlement s'applique-t-il?; 2°) Quelles règles de compétence le ... [more ▼]

Ce texte dresse un panorama général du Règlement successions en s'appuyant sur quatre questions 1°) Quand et à quelles questions le règlement s'applique-t-il?; 2°) Quelles règles de compétence le Règlement retient-il?; 3°) Comment le droit applicable est-il déterminé; 4°) quelle est la portée du certificat successoral européen [less ▲]

Detailed reference viewed: 29 (1 ULg)
Full Text
Peer Reviewed
See detailLa loutre, bio-indicatrice de la richesse des milieux aquatiques: étude dans le bassin de l'Arnon (Cher)
Libois, Roland ULg; Renaud, Christophe; Hansen, Eric et al

in Faune sauvage (2016), 311

Depuis le début de la reconquête des milieux aquatiques par la loutre d'Europe, les scientifiques s'intéressent de près à son comportement alimentaire, soucieux de mieux comprendre les relations entre ce ... [more ▼]

Depuis le début de la reconquête des milieux aquatiques par la loutre d'Europe, les scientifiques s'intéressent de près à son comportement alimentaire, soucieux de mieux comprendre les relations entre ce prédateur et ses proies dans les écosystèmes aquatiques. Son régime alimentaire a ainsi fait l'objet de nombreuses recherches dans plusieurs régions de l'ouest de la France et du massif Central, mais n'avait pas encore été étudié en région Centre-Val de Loire. Un nouveau programme de recherches a été lancé en 2011 par le Museum d'Orléans en collaboration avec l'ONCFS, dans le cadre du Plan Loire Grandeur Nature sur les trois types d'habitats aquatiques distincts, dont le bassin de l'Arnon dans le Cher. Cet hydrosystème, largement occupé par la loutre, se montre particulièrement riche en faune aquatique et très propice à l'espèce. [less ▲]

Detailed reference viewed: 22 (3 ULg)
Full Text
Peer Reviewed
See detailLaboratory identification of anaerobic bacteria isolated on Clostridium difficile selective medium
Rodriguez Diaz, Cristina ULg; Warszawski, Nathalie; Korsak Koulagenko, Nicolas ULg et al

in Acta Microbiologica et Immunologica Hungarica (2016)

Despite increasing interest in the bacterium, the methodology for Clostridium difficile recovery has not yet been standardised. Cycloserine cefoxitin fructose taurocholate (CCFT) has historically been the ... [more ▼]

Despite increasing interest in the bacterium, the methodology for Clostridium difficile recovery has not yet been standardised. Cycloserine cefoxitin fructose taurocholate (CCFT) has historically been the most used medium for C. difficile isolation from human, animal, environmental and food samples, and presumptive identification is usually based on colony morphologies. However, CCFT is not totally selective. This study describes the recovery of 24 bacteria species belonging to 10 different genera other than C. difficile, present in the environment and foods of a retirement establishment that were not inhibited in the C. difficile selective medium. These findings provide insight for further environmental and food studies as well as for isolation of C. difficile on supplemented CCFT. [less ▲]

Detailed reference viewed: 104 (19 ULg)
Full Text
Peer Reviewed
See detailUn neurinome intra-canalaire lombaire
Manto, Florence; HOUET, Elise ULg; LACREMANS, Pierre ULg et al

in Revue Médicale de Liège (2016), 71(6), 269-271

Detailed reference viewed: 52 (8 ULg)
Full Text
Peer Reviewed
See detailTHE IMPACT OF EMULSIFICATION AND WHIPPING ON FAT CRYSTALLIZATION BEHAVIOR: A COMPARATIVE STUDY BETWEEN ANHYDROUS MILK FAT AND A LAURIC FAT
Petrut, Raul Flaviu ULg; Blecker, Christophe ULg; Van Hoed, Vera et al

in International Journal of Research in Engineering and Technology (2016), 05(06), 247-260

In the present study, one commercial lauricfat (LF) and one anhydrous milk fat (AMF) were compared for their behavior in three different states: bulk, O/W emulsion and whipped cream. The objective of this ... [more ▼]

In the present study, one commercial lauricfat (LF) and one anhydrous milk fat (AMF) were compared for their behavior in three different states: bulk, O/W emulsion and whipped cream. The objective of this work was to identify the crystallization and polymorphic behavior of the aforementioned fats, while pointing out the differences between the two fats, and for each of them, between the fat’s bulk, O/W emulsion and whipped cream state. For this purpose a combination of differential scanning calorimetry (DSC) stop&return, pulsed nuclear magnetic resonance (p-NMR) and powder X-Ray diffraction (XRD) was employed. In the bulk phase, during crystallization under quiescent conditions, the two fats show a distinct thermal and polymorphic behavior. In this regards, the AMF would require a lower supercooling degree or a longer crystallization time compared to LF which showed little/no evolution during the isothermal crystallization. The XRD measurement revealed a mix of α and β’ form for LF, all forms in a double chain lamellar structure (2L). Under the same conditions the bulk AMF was characterized by a 2Lα + 2Lβ’ and in addition compared to the lauric fat, a 3Lα form. The pointed differences exist between the two fats, mainly due to their chemical compositions. The emulsification/whipping did not affect the behavior of neither AMF nor LF. The lack of differences between bulk, O/W emulsion and whipped cream of the same fat upon DSC stop&return disclose the presence of heterogeneous nucleation in all three states. Regardless the complexity of fat chemical composition, throughout obtaining O/W food emulsion and/or structured creams the fat can be processed without altering its original properties. [less ▲]

Detailed reference viewed: 26 (2 ULg)
Full Text
Peer Reviewed
See detailLes verbalisations écrites et orales des enseignants autour des journaux des apprentissages
Scheepers, Caroline ULg

in Lettre de l'AIRDF (2016), 59

En 2004, Bertrand Daunay et Jacques Treignier (2004) indiquaient que les pratiques langagières enseignantes constituaient une problématique émergente en formation initiale et continue des enseignants. Ils ... [more ▼]

En 2004, Bertrand Daunay et Jacques Treignier (2004) indiquaient que les pratiques langagières enseignantes constituaient une problématique émergente en formation initiale et continue des enseignants. Ils mentionnaient alors quelques travaux en littéracies universitaires, champ qui s’est considérablement étoffé, mais soulignaient que l’oral était peu étudié. Depuis lors, plusieurs publications sont apparues concernant les écrits professionnels des enseignants : Daunay (2011), Cadet & Rinck (2014), Bride & Chenot (2015), Ronveaux (2015), en plus des travaux pionniers entrepris par et autour de Dominique Bucheton au sujet des conduites orales en classe (voir notamment Bucheton & al., 2004 ; Bucheton & Dezutter, 2008 ; Bucheton & Soulé, 2009). À la suite de Dominique Bucheton et al. (2004), je soutiens que le langage constitue la dimension centrale de l’activité enseignante, qu’il soit écrit ou oral. Dans une perspective vygotskienne (1997 [1931], 2014 [1934]), je considère en effet que les verbalisations enseignantes constituent des médiations décisives dans le processus d’apprentissage des élèves. Ces traces sémiotiques diverses constituent véritablement des outils au sens vygotskien (1934-1997, 1931-2014), donc des dimensions susceptibles de soutenir chez les élèves des fonctions psychiques supérieures (mémoriser, problématiser…). Les verbalisations enseignantes constituent des médiations décisives, donc des intermédiaires, des interfaces, entre l’élève et le savoir. À ce titre, ces pratiques langagières fondatrices de l’agir enseignant méritent d’être mieux cernées. La présente contribution se propose d’étudier les verbalisations écrites et orales déployées par les enseignants autour des journaux des apprentissages, journaux réflexifs par lesquels élèves du primaire et du secondaire sont invités à secondariser (Bautier & Goigoux, 2004) les apprentissages réalisés en classe : autrement dit, ils adoptent à leur égard une posture exotopique, une posture de surplomb. Cette analyse de l’activité interactive et dynamique « enseignant/élève » repose sur une conception qui articule contenus d’enseignement et pratiques langagières scolaires, tandis qu’elle vise à décrire « le détail ordinaire du quotidien » des praticiens (Bucheton, 2008). [less ▲]

Detailed reference viewed: 18 (2 ULg)
Full Text
Peer Reviewed
See detailPlanning urban megaprojects in the Gulf: The international consultancy firms in urban planning between global and contingent
Aoun, Oula ULg; Teller, Jacques ULg

in Frontiers of Architectural Research (2016), 5(2), 254264

Driven by globalization and market openings, many architecture and engineering firms have become global. By focusing on the urban megaprojects in the Gulf, a particular cultural and political context ... [more ▼]

Driven by globalization and market openings, many architecture and engineering firms have become global. By focusing on the urban megaprojects in the Gulf, a particular cultural and political context, this paper argues that such firms have a major role in the rapid urban transformation of Gulf countries and act as transfer agents of an international knowledge in the urban planning domain. However, the transfer is adapted by several context-related char- acteristics, such as local governance, urban knowledge, and regulatory framework. This paper explores the procedural adaptation of these firms to the Gulf Cooperation Council (GCC) in terms of internal structure, methodology, adopted tools, and interaction with the context. The level of learning that results from this transfer is also investigated. [less ▲]

Detailed reference viewed: 111 (15 ULg)
Full Text
Peer Reviewed
See detailOn the fleas and louse (Insecta: Siphonaptera and Anoplura) of the garden dormouse, Eliomys quercinus (L. 1766) in Belgium
Libois, Roland ULg

in Annales de la Société entomologique de France (N.S.) (2016)

More than 3500 fleas, collected in southern Belgium, from 54 garden dormice (Eliomys quercinus) and from 58 nests of the rodent, were examined. Ceratophyllus s. sciurorum seems to be the only regular and ... [more ▼]

More than 3500 fleas, collected in southern Belgium, from 54 garden dormice (Eliomys quercinus) and from 58 nests of the rodent, were examined. Ceratophyllus s. sciurorum seems to be the only regular and abundant flea on the garden dormouse and in its nest whereas Myoxopsylla laverani is quite uncommon (5/31 infested animal and 11/52 infested nests). In comparison, 96 garden dormice were checked in France. M. laverani is present on nearly every infested animal (61/66). Other fleas were also found, some mammal-fleas (Megabothris turbidus, Hystrichopsylla talpae, several Ctenophthalmus spp.) and great numbers of bird-fleas (Ceratophyllus gallinae and Dasypsyllus gallinulae) because the dormouse-nests where the fleas were taken were built on old tit-nests (Parus spp). Finally, Schizophthirus pleurophaeus, a louse, was collected for the first time in Belgium. [less ▲]

Detailed reference viewed: 26 (5 ULg)
Full Text
Peer Reviewed
See detailBenchmarking for Bayesian Reinforcement Learning
Castronovo, Michaël ULg; Ernst, Damien ULg; Couëtoux, Adrien ULg et al

in PLoS ONE (2016)

In the Bayesian Reinforcement Learning (BRL) setting, agents try to maximise the col- lected rewards while interacting with their environment while using some prior knowledge that is accessed beforehand ... [more ▼]

In the Bayesian Reinforcement Learning (BRL) setting, agents try to maximise the col- lected rewards while interacting with their environment while using some prior knowledge that is accessed beforehand. Many BRL algorithms have already been proposed, but even though a few toy examples exist in the literature, there are still no extensive or rigorous benchmarks to compare them. The paper addresses this problem, and provides a new BRL comparison methodology along with the corresponding open source library. In this methodology, a comparison criterion that measures the performance of algorithms on large sets of Markov Decision Processes (MDPs) drawn from some probability distributions is defined. In order to enable the comparison of non-anytime algorithms, our methodology also includes a detailed analysis of the computation time requirement of each algorithm. Our library is released with all source code and documentation: it includes three test prob- lems, each of which has two different prior distributions, and seven state-of-the-art RL algorithms. Finally, our library is illustrated by comparing all the available algorithms and the results are discussed. [less ▲]

Detailed reference viewed: 469 (41 ULg)
Full Text
See detailEncore du nouveau à propos du Reliquaire de Charles le Téméraire
Dumont, Jonathan ULg

in Trésor de Liège : Bulletin Trimestriel (2016), 47(juin 2016), 3-7

Detailed reference viewed: 16 (1 ULg)
Full Text
Peer Reviewed
See detailSustaining Inter-Organizational Relationships across Institutional Logics and Power Asymmetries: the Case of Fair Trade
Nicholls, Alex; Huybrechts, Benjamin ULg

in Journal of Business Ethics (2016), 135(4), 699-714

In Fair Trade (FT), as well as in other ‘mixed-form’ fields (Becchetti & Huybrechts 2008; Marwell & McInerney 2005), non-profit organizations and social enterprises have been partnering with large ... [more ▼]

In Fair Trade (FT), as well as in other ‘mixed-form’ fields (Becchetti & Huybrechts 2008; Marwell & McInerney 2005), non-profit organizations and social enterprises have been partnering with large corporations over long time periods despite the presence of conditions that might be expected to destabilize such relationships. These conditions include striking differences in size, economic power, and organizational goals or ‘logics’. Given these asymmetries, the collaborations are typically seen as problematic and temporary because the stronger party (the corporation) will impose its (market) logics upon the weaker one (the social enterprise), leading to either instrumentalizing and corrupting the latter or to the breakdown of the collaboration. Whilst some of the literature on FT and other market-oriented social movements has tended to depict corporate participation as a threat to the original goals of the social movement and to the integrity of partnering social enterprises (e.g. Fridell et al. 2008; Reed 2009), there is evidence of a set of social enterprise-corporate relationships that persist over time and cannot be simply summarized as dominated by the sole corporate, market logic. These examples illustrate the emergence of new working relationships across the conventional divides between distinct sectors – the public, private, and civil society – that offer new approaches to managing power asymmetries and apparently conflicting logics – typically, in FT and more generally in social entrepreneurship, market and social justice/welfare logics (Battilana & Lee 2014; Defourny & Nyssens 2006; Huybrechts & Nicholls 2012; Smith et al. forthcoming). This leads to the following research question: Under what conditions can inter-organizational relationships emerge and be sustained despite power asymmetries and the presence of distinct, potentially conflicting, institutional logics? The analysis in this paper aims to extend theory by providing an alternative to more deterministic analyses of inter-organizational relationships that suggest that the more powerful actor will always impose its logics upon the less powerful organization thus undermining the persistence of the relationship over time. In the process, this research adds a new construct to existing theory around the resolution of conflict in institutional logics by suggesting that dynamic persistence is also evident in contrast to examples of conflict resolution through dominance, compromise, hybridization, synthesis, or relationship breakdown. Based on the analysis of the relationships between commercial buyers and FTOs, initially embodying market and social justice logics respectively, this paper proposes a set of key conditions under which dynamic persistence can be observed even in the presence of power asymmetries. [less ▲]

Detailed reference viewed: 236 (5 ULg)
Full Text
Peer Reviewed
See detailToxoplasma gondii, cytomegalovirus, and Treponema pallidum infections in pregancy: what's new?
HUYNEN, Pascale ULg; LAZZAROTTO, Tiziana; PEYRON, François

in Wiener Klinisches Magazin (2016), 1(3), 1-8

Detailed reference viewed: 11 (1 ULg)
Full Text
See detailTronc commun: reculer pour mieux sauter ?
Lafontaine, Dominique ULg

in TRACeS de ChanGements (2016), 226

Detailed reference viewed: 13 (2 ULg)
Full Text
Peer Reviewed
See detailPolar interface phonons in ionic toroidal systems
Nguyen, Ngoc Duy ULg; Evrard, Roger ULg; Stroscio, Michael

in Journal of Physics : Condensed Matter (2016), 28(34), 345301

We use the dielectric continuum model to obtain the polar (Fuchs–Kliewer like) interface vibration modes of toroids made of ionic materials either embedded in a different material or in vacuum, with ... [more ▼]

We use the dielectric continuum model to obtain the polar (Fuchs–Kliewer like) interface vibration modes of toroids made of ionic materials either embedded in a different material or in vacuum, with applications to nanotoroids specially in mind. We report the frequencies of these modes and describe the electric potential they produce. We establish the quantum-mechanical Hamiltonian appropriate for their interaction with electric charges. This Hamiltonian can be used to describe the effect of this interaction on different types of charged particles either inside or outside the torus. [less ▲]

Detailed reference viewed: 34 (4 ULg)
Full Text
Peer Reviewed
See detailDefects do Catalysis: CO Monolayer Oxidation and Oxygen Reduction Reaction on Hollow PtNi/C Nanoparticles
Dubau, Laetitia; Nelayah, Jaysen; Moldovan, Simona et al

in ACS Catalysis (2016)

Detailed reference viewed: 20 (0 ULg)
Full Text
Peer Reviewed
See detailOsteoarthritis biomarkers derived from cartilage extracellular matrix: Current status and future perspectives.
Henrotin, Yves ULg; Sanchez, Christelle ULg; Bay-Jensen, A. C. et al

in Annals of physical and rehabilitation medicine (2016), 59(3), 145-148

Specific soluble biomarkers can be powerful tools for the diagnosis, prognosis and personalized management of osteoarthritis (OA). Biomarkers are potential indicators of the effect of a drug on cartilage ... [more ▼]

Specific soluble biomarkers can be powerful tools for the diagnosis, prognosis and personalized management of osteoarthritis (OA). Biomarkers are potential indicators of the effect of a drug on cartilage metabolism and provide crucial information about the mechanisms of drug action. In this review, we address key questions concerning the use of biomarkers in OA management: Why do we need soluble biomarkers? What are the most widely investigated biomarkers derived from cartilage extracellular matrix? What are the most common pitfalls in interpreting soluble biomarker measurements? What are the perspectives and future research directions in this field? We review current evidence to propose that cartilage-derived soluble biomarkers are complementary "drug development tools" that can be applied during drug development from preclinical research to clinical evaluation. In the future, such biomarkers could be surrogate markers of clinical and/or imaging outcomes. Successful standardization and implementation of automated biomarker assays will facilitate their use in companion diagnostics in the context of personalized medicine for enhanced management of OA. [less ▲]

Detailed reference viewed: 23 (4 ULg)
Full Text
Peer Reviewed
See detailThe chlorophyll a fluorescence induction curve in the green microalga Haematococcus pluvialis: Further insight into the nature of the P-S-M fluctuation and its relationship with the "low-wave" phenomenon at steady-state
Fratamico, Anthony ULg; Tocquin, Pierre ULg; Franck, Fabrice ULg

in Photosynthesis Research (2016), 128(3), 271-285

Chlorophyll fluorescence is an information-rich signal which provides an access to the management of light absorbed by PSII. A good example of this is the succession of fast fluorescence fluctuations ... [more ▼]

Chlorophyll fluorescence is an information-rich signal which provides an access to the management of light absorbed by PSII. A good example of this is the succession of fast fluorescence fluctuations during light-induced photosynthetic induction after dark-adaptation. During this period, the fluorescence trace exhibits several inflexion points: O-J-I-P-S-M-T. Thereas the OJIP part of this kinetics has been the subject of many studies, the processes that underly the PSMT transient are less understood. Here, we report an analysis of the PSMT phase in the green microalga Haematococcus pluvialis in terms of electron acceptors and light use by photochemistry, fluorescence and non-photochemical quenching (NPQ). We identify additional sub-phases between P and S delimited by an inflexion point, that we name Q, found in the second time-scale. The P-Q phase expresses a transient photochemical quenching specifically due to alternative electron transport to oxygen. During the transition from Q to S, the NPQ increases and then relaxes during the S-M phase in about 1 min. It is suggested that this transient NPQ observed during induction is a high energy state quenching (qE) dependent the alternative electron transport to molecular oxygen. We further show that this NPQ is of the same nature than the NPQ, known as the low-wave phenomenon, which is transiently observed after a saturating light pulse given at steady-state. In both cases, the NPQ is oxygen-dependent. This NPQ is observed at external pH 6.0, but not at pH 7.5, which seems correlated with faster saturation of the PQ pool at pH 6.0. [less ▲]

Detailed reference viewed: 49 (19 ULg)
Full Text
Peer Reviewed
See detailCerebral metabolism before and after external trigeminal nerve stimulation in episodic migraine
MAGIS, Delphine ULg; D'Ostilio, Kevin ULg; Thibaut, Aurore ULg et al

in Cephalalgia : An International Journal of Headache (2016)

Detailed reference viewed: 36 (2 ULg)
Full Text
Peer Reviewed
See detailMémoires des époux Klarsfeld : « Et si on écrivait l’Histoire ? »
Nossent, Jérôme ULg

in Cahiers Mémoire et Politique (2016), 3

Abstract of Klarsfeld Beate et Klarsfeld Serge, Mémoires, Paris, Fayard Flammarion, 2015, 687 p.

Detailed reference viewed: 17 (4 ULg)
Full Text
Peer Reviewed
See detailAir-ice carbon pathways inferred from a sea ice tank experiment
Kotovitch, Marie ULg; Moreau, Sébastien; Zhou, Jiayun et al

in Elementa: Science of the Anthropocene (2016)

Air-ice CO2 fluxes were measured continuously using automated chambers from the initial freezing of a sea ice cover until its decay. Cooling seawater prior to sea ice formation acted as a sink for ... [more ▼]

Air-ice CO2 fluxes were measured continuously using automated chambers from the initial freezing of a sea ice cover until its decay. Cooling seawater prior to sea ice formation acted as a sink for atmospheric CO2, but as soon as the first ice crystals started to form, sea ice turned to a source of CO2, which lasted throughout the whole ice growth phase. Once ice decay was initiated by warming the atmosphere, the sea ice shifted back again to a sink of CO2. Direct measurements of outward ice-atmosphere CO2 fluxes were consistent with the depletion of dissolved inorganic carbon in the upper half of sea ice. Combining measured air-ice CO2 fluxes with the partial pressure of CO2 in sea ice, we determined strongly different gas transfer coefficients of CO2 at the air-ice interface between the growth and the decay phases (from 2.5 to 0.4 mol m−2 d−1 atm−1). A 1D sea ice carbon cycle model including gas physics and carbon biogeochemistry was used in various configurations in order to interpret the observations. All model simulations correctly predicted the sign of the air-ice flux. By contrast, the amplitude of the flux was much more variable between the different simulations. In none of the simulations was the dissolved gas pathway strong enough to explain the large fluxes during ice growth. This pathway weakness is due to an intrinsic limitation of ice-air fluxes of dissolved CO2 by the slow transport of dissolved inorganic carbon in the ice. The best means we found to explain the high air-ice carbon fluxes during ice growth is an intense yet uncertain gas bubble efflux, requiring sufficient bubble nucleation and upwards rise. We therefore call for further investigation of gas bubble nucleation and transport in sea ice. [less ▲]

Detailed reference viewed: 55 (9 ULg)
Full Text
Peer Reviewed
See detailSingle point incremental forming simulation with adaptive remeshing technique using solid-shell elements
Sena, José; Lequesne, Cedric; Duchene, Laurent ULg et al

in Engineering Computations International Journal for Computer- Aided Engineering and Software (2016), 33(5), 1388-1421

Numerical simulation of the single point incremental forming (SPIF) processes can be very demanding and time consuming due to the constantly changing contact conditions between the tool and the sheet ... [more ▼]

Numerical simulation of the single point incremental forming (SPIF) processes can be very demanding and time consuming due to the constantly changing contact conditions between the tool and the sheet surface, as well as the nonlinear material behaviour combined with non-monotonic strain paths. The purpose of this paper is to propose an adaptive remeshing technique implemented in the in-house implicit finite element code LAGAMINE, to reduce the simulation time. This remeshing technique automatically refines only a portion of the sheet mesh in vicinity of the tool, therefore following the tool motion. As a result, refined meshes are avoided and consequently the total CPU time can be drastically reduced. [less ▲]

Detailed reference viewed: 18 (1 ULg)
Full Text
Peer Reviewed
See detailOn the subject of Homosexuality: What Freud Said
Naziri, Despina ULg; Flanders, Sara; Ladame, Francois et al

in International Journal of Psychoanalysis (2016), 97

Detailed reference viewed: 41 (3 ULg)
Full Text
See detailRwanda. À travers nous l'humanité de Marie-France Collard : Du théâtre au documentaire
Jousten, Lison ULg

in En jeu. Histoire et mémoires vivantes (2016), 7

Rwanda. Through us, humanity (2005), a movie by Marie-France Collard, follows on from the play Rwanda 94, a project in which she tool part as a author and videographer. Showcased in 2000, the play arises ... [more ▼]

Rwanda. Through us, humanity (2005), a movie by Marie-France Collard, follows on from the play Rwanda 94, a project in which she tool part as a author and videographer. Showcased in 2000, the play arises questions about memory, representation, and commitment. The documentary was carried out during artist collective Groupov's tour in Kigaly on the occasion of the commemoration of the genocide's tenth anniversary. It brings those topics up again, gets back to the reception of the play by the Rwandan audience and, in a broader way, to a country in mourning. [less ▲]

Detailed reference viewed: 53 (19 ULg)
Full Text
Peer Reviewed
See detailWASP-121 b: a hot Jupiter close to tidal disruption transiting an active F star
Delrez, Laetitia ULg; Santerne, A.; Almenara, J.-M. et al

in Monthly Notices of the Royal Astronomical Society (2016), 458(4), 4025-4043

We present the discovery by the WASP-South survey of WASP-121 b, a new remarkable short-period transiting hot Jupiter. The planet has a mass of 1.183_{-0.062}^{+0.064} MJup, a radius of 1.865 ± 0.044 RJup ... [more ▼]

We present the discovery by the WASP-South survey of WASP-121 b, a new remarkable short-period transiting hot Jupiter. The planet has a mass of 1.183_{-0.062}^{+0.064} MJup, a radius of 1.865 ± 0.044 RJup, and transits every 1.274 9255_{-0.000 0025}^{+0.000 0020} days an active F6-type main-sequence star (V = 10.4, 1.353_{-0.079}^{+0.080} M⊙, 1.458 ± 0.030 R⊙, Teff = 6460 ± 140 K). A notable property of WASP-121 b is that its orbital semimajor axis is only ˜1.15 times larger than its Roche limit, which suggests that the planet is close to tidal disruption. Furthermore, its large size and extreme irradiation (˜7.1 109 erg s-1 cm-2) make it an excellent target for atmospheric studies via secondary eclipse observations. Using the TRAnsiting Planets and PlanetesImals Small Telescope, we indeed detect its emission in the z'-band at better than ˜4σ, the measured occultation depth being 603 ± 130 ppm. Finally, from a measurement of the Rossiter-McLaughlin effect with the CORALIE spectrograph, we infer a sky-projected spin-orbit angle of 257.8°_{-5.5°}^{+5.3°}. This result may suggest a significant misalignment between the spin axis of the host star and the orbital plane of the planet. If confirmed, this high misalignment would favour a migration of the planet involving strong dynamical events with a third body. [less ▲]

Detailed reference viewed: 27 (2 ULg)
Full Text
Peer Reviewed
See detailLe souci du monde — Le souci de soi. Approches croisées entre arts et médias : compte-rendu
Jousten, Lison ULg

in French Journal for Media Research (2016)

Detailed reference viewed: 36 (10 ULg)
Full Text
Peer Reviewed
See detailDe la note de lecture à la formulation d'une problématique
Scheepers, Caroline ULg

in Linx (2016), 72

L’initiation à l’écriture scientifique telle qu’elle se décline dans les mémoires de Master peut se focaliser sur plusieurs de ses dimensions, mais la capacité à élaborer une problématique est peut-être ... [more ▼]

L’initiation à l’écriture scientifique telle qu’elle se décline dans les mémoires de Master peut se focaliser sur plusieurs de ses dimensions, mais la capacité à élaborer une problématique est peut-être l’une des exigences les plus complexes qui se pose au chercheur néophyte. Cette contribution envisage des travaux dans lesquels les étudiants doivent tout à la fois rendre compte d’un ouvrage lu, formuler et étayer un avis critique à son encontre avant de concevoir la problématique qui sera traitée dans leur mémoire. Une analyse sociolinguistique des données révèle trois logiques scripturales contrastées : émergent en effet des discours restitutifs (il s’agit de donner à voir), critiques (il s’agit de faire croire) ou problématisants (il s’agit de faire savoir). La question de la place dévolue à la linguistique, tant en termes de formation que de recherche, sous-tend toute la réflexion. [less ▲]

Detailed reference viewed: 20 (2 ULg)
Full Text
Peer Reviewed
See detailAn Exact Method for Designing Shewhart X ̅ and S2 Control Charts to Guarantee the In-Control Performance
Faraz, Alireza ULg; Heuchenne, Cédric ULg

in Journal of Quality Technology (2016)

The in-control performance of the Shewhart X ̅ and S2 control charts with estimated in-control parameters has been evaluated by a number of authors. Results indicate an unrealistically large amount of ... [more ▼]

The in-control performance of the Shewhart X ̅ and S2 control charts with estimated in-control parameters has been evaluated by a number of authors. Results indicate an unrealistically large amount of Phase I data is needed to have the desired in-control average run length (ARL) value in Phase II. To overcome this problem, it has been recommended that the control limits be adjusted based on a bootstrap method to guarantee that the in-control ARL is at least a specified value with a certain specified probability. In our paper we present simple formulas for the required control limits so that practitioners do not have to use the bootstrap method. An assumption of normality is required. The advantage of our proposed method is in its simplicity; there is no bootstrapping and the control chart constants do not depend on the Phase I sample data. [less ▲]

Detailed reference viewed: 117 (2 ULg)
Full Text
Peer Reviewed
See detailLe contexte social de l’isolement des personnes âgées de 65 ans et plus en Belgique
Maggi, Patrick ULg

in Chronique de la ligue des droits de l'Homme (2016), 174

Detailed reference viewed: 49 (4 ULg)
Full Text
See detailLa Présidence de la Fédération Internationale des Professeurs de Français
Defays, Jean-Marc ULg

in Vivre le Français : Revue de l'Association Belge des Professeurs de Français (2016), 249

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailDoes sector-specific experience matter? The case of European higher education ministers
Jacqmin, Julien ULg; Lefebvre, Mathieu ULg

in Research Policy (2016), 45(5), 987998

This paper looks at the relationship between higher education ministers and the performance of the sector that they govern. Using an original panel dataset with the characteristics of European higher ... [more ▼]

This paper looks at the relationship between higher education ministers and the performance of the sector that they govern. Using an original panel dataset with the characteristics of European higher education ministers, we find that having a past experience in the sector leads to a higher level of performance, as measured by ranking data. Making a parallel with the literature about the impact of education on the educated, we discuss potential explanations behind the impact of this on-the-job learning experience. As we find that this characteristic has no impact on the spendings of the sector, we argue that this academic experience makes them more prone to introduce adequate reforms that makes the sector more attractive for top-researchers. Furthermore, we find that this result is driven by ministers with both sector-specific and electoral experience, the latter measured by a successful election at the regional or national level. This tends to show that political credibility should not be overshadowed by the importance of the sector-specific experience of ministers. [less ▲]

Detailed reference viewed: 25 (4 ULg)
Full Text
Peer Reviewed
See detailGlucosinolate profiles by HPLC-DAD, phenolic compositions and antioxidant activity of Eruca vesicaria longirostris: Impact of plant part and origin
Bouacida, Saoussen; Koubaier, Hayet Ben Haj; Snoussi, Ahmed et al

in Mediterranean Journal of Chemistry (2016), 5(5), 528-539

The glucosinolate profiles, phenol and flavonoid contents and the antioxidant activity of Eruca vesicaria longirostris were studied for different organs and origins. Eleven desulpho-glucosinolates (DS ... [more ▼]

The glucosinolate profiles, phenol and flavonoid contents and the antioxidant activity of Eruca vesicaria longirostris were studied for different organs and origins. Eleven desulpho-glucosinolates (DS-GLSs) were isolated and quantified by lipid chromatography- DAD. Similarity between profiles was obtained. Total DS-GLS content, expressed as sinigrin equivalents (SE) revealed a certain variabilily ranging between (76.07-45.61), (27.01-13.53), (4.52 -18.01), (9.39-3.37) and (1.16-13.99) μmol /g DW for seeds, flowers, leaves, roots and stems, respectively. [less ▲]

Detailed reference viewed: 82 (7 ULg)
Full Text
Peer Reviewed
See detailExplaining the diversity of motivations behind community renewable energy
Bauwens, Thomas ULg

in Energy Policy (2016), 93

Community-based renewable energy initiatives may be important actors in the transition toward low-carbon energy systems. In turn, stimulating investments in renewable energy production at the community ... [more ▼]

Community-based renewable energy initiatives may be important actors in the transition toward low-carbon energy systems. In turn, stimulating investments in renewable energy production at the community level requires a better understanding of investors’ motives. This paper aims to study the heterogeneity of motivations that drive individuals to participate in community renewable energy projects and the underlying explanatory factors behind this, as well as the implications for their level of engagement in initiatives. Based on quantitative data from an original survey conducted with two renewable energy cooperatives in Flanders, the statistical analysis shows that cooperative members should not be considered as one homogeneous group. Several categories of members with different motives and levels of engagement can be distinguished. This heterogeneity is explained by contrasts in terms of institutional settings, spatial patterns and attitudes to the diffusion of institutional innovations. Regarding policy implications, the findings suggest that this heterogeneity should be taken into account in designing more effective supporting policies to stimulate investments at the community level. The activation of social norms is also shown to be a promising mechanism for triggering investment decisions, although the implications of its interplay with economic incentives should be further explored. [less ▲]

Detailed reference viewed: 184 (8 ULg)
Full Text
Peer Reviewed
See detailImpact of cord blood banking technologies on clinical outcome: a Eurocord/Cord Blood Committee (CTIWP), European Society for Blood and Marrow Transplantation and NetCord retrospective analysis
Saccardi, Riccardo; Tucunduva, Luciana; Ruggeri, Annalisa et al

in Transfusion (2016), 56(8), 2021-2029

BACKGROUND Techniques for banking cord blood units (CBUs) as source for hematopoietic stem cell transplantation have been developed over the past 20 years, aimed to improve laboratory efficiency without ... [more ▼]

BACKGROUND Techniques for banking cord blood units (CBUs) as source for hematopoietic stem cell transplantation have been developed over the past 20 years, aimed to improve laboratory efficiency without altering the biologic properties of the graft. A large-scale, registry-based assessment of the impact of the banking variables on the clinical outcome is currently missing. STUDY DESIGN AND METHODS A total of 677 single cord blood transplants (CBTs) carried out for acute leukemia in complete remission in centers affiliated with the European Society for Blood and Marrow Transplantation were selected. An extensive set of data concerning CBU banking were collected and correlations with clinical outcome were assessed. Clinical endpoints were transplant-related mortality, engraftment, and graft-versus-host disease (GVHD). RESULTS The median time between collection and CBT was 4.1 years (range, 0.2-16.3 years). Volume reduction (VR) of CBUs before freezing was performed in 59.2% of available reports; in half of these the frozen volume was less than 30 mL. Cumulative incidences of neutrophil engraftment on Day 60, 100-day acute GVHD (II-IV), and 4-year chronic GVHD were 87, 29, and 21 ± 2%. The cumulative incidence of nonrelapse mortality (NRM) at 100 days and 4-year NRM were, respectively, 16 ± 2 and 30 ± 2%. Neither the variables related to banking procedures nor the interval between collection and CBT influenced the clinical outcome. CONCLUSION These findings indicate a satisfactory validation of the techniques associated with CBU VR across the banks. Cell viability assessment varied among the banks, suggesting that efforts to improve the standardization of CBU quality controls are needed. [less ▲]

Detailed reference viewed: 70 (16 ULg)
Full Text
Peer Reviewed
See detailL’obligation d’aménagement raisonnable pour motif religieux en droit du travail et les ressources du droit du bien-être
Linguelet, Renaud ULg

in Journal des Tribunaux du Travail (2016)

L’obligation d’aménagement raisonnable pour cause de liberté de conscience et de religion peut se définir comme une obligation de nature juridique, applicable dans une situation discriminatoire ou mettant ... [more ▼]

L’obligation d’aménagement raisonnable pour cause de liberté de conscience et de religion peut se définir comme une obligation de nature juridique, applicable dans une situation discriminatoire ou mettant en cause la liberté religieuse d’un individu, qui a pour objectif d’aménager une norme ou une pratique de portée générale. Elle s’exerce dans les limites du raisonnable. Afin de saisir pleinement la portée du concept d’aménagement raisonnable pour motif religieux et ses conséquences en droit du travail, un détour par l’Amérique du Nord s’impose. Par la suite, cet article se focalise sur la possibilité de consacrer l’obligation d’aménagement raisonnable en droit belge. Pour ce faire, les enseignements à tirer du droit européen et communautaire sont mis en lumière, avant de terminer ce tour d’horizon par une analyse des ressources qu’offrent l’article 20, 5°, de la loi du 3 juillet 1978 relative aux contrats de travail ainsi que la législation relative aux risques psychosociaux telle qu’elle a été amendée lors de la réforme de 2014. [less ▲]

Detailed reference viewed: 79 (8 ULg)
Full Text
Peer Reviewed
See detailStatics and dynamics of magnetocapillary bonds
Lagubeau, Guillaume; Grosjean, Galien ULg; Darras, Alexis ULg et al

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2016), 93

When ferromagnetic particles are suspended at an interface under magnetic fields, dipole-dipole interactions compete with capillary attraction. This combination of forces has recently given promising ... [more ▼]

When ferromagnetic particles are suspended at an interface under magnetic fields, dipole-dipole interactions compete with capillary attraction. This combination of forces has recently given promising results towards controllable self-assemblies as well as low-Reynolds-number swimming systems. The elementary unit of these assemblies is a pair of particles. Although equilibrium properties of this interaction are well described, the dynamics remain unclear. In this paper, the properties of magnetocapillary bonds are determined by probing them with magnetic perturbations. Two deformation modes are evidenced and discussed. These modes exhibit resonances whose frequencies can be detuned to generate nonreciprocal motion. A model is proposed that can become the basis for elaborate collective behaviors. [less ▲]

Detailed reference viewed: 30 (12 ULg)
Full Text
Peer Reviewed
See detailCharacterisation of Phosphate Accumulating Organisms and Techniques for Polyphosphate Detection: A Review
Tarayre, Cédric ULg; Nguyen, Huu-Thanh; Brognaux, Alison ULg et al

in Sensors (2016), 16(797), 1-14

Phosphate minerals have long been used for the production of phosphorus-based chemicals used in many economic sectors. However, these resources are not renewable and the natural phosphate stocks are ... [more ▼]

Phosphate minerals have long been used for the production of phosphorus-based chemicals used in many economic sectors. However, these resources are not renewable and the natural phosphate stocks are decreasing. In this context, the research of new phosphate sources has become necessary. Many types of wastes contain non-negligible phosphate concentrations, such as wastewater. In wastewater treatment plants, phosphorus is eliminated by physicochemical and/or biological techniques. In this latter case, a specific microbiota, phosphate accumulating organisms (PAOs), accumulates phosphate as polyphosphate. This molecule can be considered as an alternative phosphate source, and is directly extracted from wastewater generated by human activities. This review focuses on the techniques which can be applied to enrich and try to isolate these PAOs, and to detect the presence of polyphosphate in microbial cells. [less ▲]

Detailed reference viewed: 41 (4 ULg)
Full Text
Peer Reviewed
See detailManagement of relapsed multiple myeloma: Recommendations of the international myeloma working group
Laubach, J.; Garderet, L.; Mahindra, A. et al

in Leukemia : Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K (2016), 30(5), 1005-1017

The prognosis for patients multiple myeloma (MM) has improved substantially over the past decade with the development of new, more effective chemotherapeutic agents and regimens that possess a high level ... [more ▼]

The prognosis for patients multiple myeloma (MM) has improved substantially over the past decade with the development of new, more effective chemotherapeutic agents and regimens that possess a high level of anti-tumor activity. In spite of this important progress, however, nearly all MM patients ultimately relapse, even those who experience a complete response to initial therapy. Management of relapsed MM thus represents a vital aspect of the overall care for patients with MM and a critical area of ongoing scientific and clinical research. This comprehensive manuscript from the International Myeloma Working Group provides detailed recommendations on management of relapsed disease, with sections dedicated to diagnostic evaluation, determinants of therapy, and general approach to patients with specific disease characteristics. In addition, the manuscript provides a summary of evidence from clinical trials that have significantly impacted the field, including those evaluating conventional dose therapies, as well as both autologous and allogeneic stem cell transplantation. Specific recommendations are offered for management of first and second relapse, relapsed and refractory disease, and both autologous and allogeneic transplant. Finally, perspective is provided regarding new agents and promising directions in management of relapsed MM. [less ▲]

Detailed reference viewed: 86 (2 ULg)
Full Text
Peer Reviewed
See detailAssessing steady-state, multivariate experimental data using Gaussian Processes: the GPExp open-source library
Quoilin, Sylvain ULg; Schrouff, Jessica ULg

in Energies (2016), 9(6),

Experimental data are subject to different sources of disturbance and errors, whose importance should be assessed. The level of noise, the presence of outliers or a measure of the “explainability” of the ... [more ▼]

Experimental data are subject to different sources of disturbance and errors, whose importance should be assessed. The level of noise, the presence of outliers or a measure of the “explainability” of the key variables with respect to the externally-imposed operating condition are important indicators, but are not straightforward to obtain, especially if the data are sparse and multivariate. This paper proposes a methodology and a suite of tools implementing Gaussian processes for quality assessment of steady-state experimental data. The aim of the proposed tool is to: (1) provide a smooth (de-noised) multivariate operating map of the measured variable with respect to the inputs; (2) determine which inputs are relevant to predict a selected output; (3) provide a sensitivity analysis of the measured variables with respect to the inputs; (4) provide a measure of the accuracy (confidence intervals) for the prediction of the data; (5) detect the observations that are likely to be outliers. We show that Gaussian processes regression provides insightful numerical indicators for these purposes and that the obtained performance is higher or comparable to alternative modeling techniques. Finally, the datasets and tools developed in this work are provided within the GPExp open-source package. [less ▲]

Detailed reference viewed: 29 (5 ULg)
Full Text
Peer Reviewed
See detailThe association of timing of retirement with cognitive performance in old age: The role of leisure activities after retirement
Ihle, Andreas; Grotz, Catherine ULg; Adam, Stéphane ULg et al

in International Psychogeriatrics (2016)

Background: The role of timing of retirement on cognitive functioning in old age is inconclusive so far. Therefore, the present study set out to investigate the association of timing of retirement with ... [more ▼]

Background: The role of timing of retirement on cognitive functioning in old age is inconclusive so far. Therefore, the present study set out to investigate the association of timing of retirement with cognitive performance and its interplay with key correlates of cognitive reserve in a large sample of older adults. Methods: Two thousand two hundred and sixty three older adults served as sample for the present study. Different psychometric tests (TMT A, TMT B, Mill Hill) were administered. In addition, individuals were interviewed on their retirement, occupation, educational attainment, and regarding 18 leisure activities that have been carried out after retirement. Results: Earlier retirement (compared to retirement at legal age) was significantly associated with better performance in the TMT A, the TMT B, and the Mill Hill vocabulary test. Moderation analyses showed that in individuals with a moderate number of leisure activities in old age, earlier retirement was related to better cognitive performance, but not in those with a relatively large number of leisure activities. Hierarchical regression analyses revealed that entering leisure activities as additional predictor significantly increased explained variance in the cognitive measures over and above all other investigated markers of cognitive reserve (i.e., occupation and education). Conclusions: Present data further corroborate the view that leisure activities even in old age may lead to further enrichment effects and thereby may be related to better cognitive functioning. The role of engaging in activities in the context of major life events such as retirement is discussed. [less ▲]

Detailed reference viewed: 51 (5 ULg)
Full Text
Peer Reviewed
See detailUse of Estetrol with other Steroids for Attenuation of Neonatal Hypoxic-Ischemic brain injury:to combine or not to combine?
Tskitishvili, Ekaterine ULg; Pequeux, Christel ULg; Munaut, Carine ULg et al

in Oncotarget (2016)

Estetrol (E4), estradiol (E2) and progesterone (P4) have important antioxidative and neuroprotective effects in neuronal system. We aimed to study the consequence of combined steroid therapy in neonatal ... [more ▼]

Estetrol (E4), estradiol (E2) and progesterone (P4) have important antioxidative and neuroprotective effects in neuronal system. We aimed to study the consequence of combined steroid therapy in neonatal hypoxic-ischemic encephalopathy (HIE). In vitro the effect of E4 combined with other steroids on oxidative stress and the cell viability in primary hippocampal cultures was evaluated by lactate dehydrogenase and cell survival assays. In vivo neuroprotective and therapeutic efficacy of E4 combined with other steroids was studied in HIE model of immature rats. The rat pups rectal temperature, body and brain weights were evaluated. The hippocampus and the cortex were investigated by histo/immunohistochemistry: intact cell number counting, expressions of markers for early gray matter lose, neuro- and angiogenesis were studied. Glial fibrillary acidic protein was evaluated by ELISA in blood samples. In vitro E4 and combinations of high doses of E4 with P4 and/or E2 significantly diminished the LDH activity and upregulated the cell survival. In vivo pretreatment or treatment by different combinations of E4 with other steroids had unalike effects on body and brain weight, neuro- and angiogenesis, and GFAP expression in blood. The combined use of E4 with other steroids has no benefit over the single use of E4. [less ▲]

Detailed reference viewed: 34 (11 ULg)
Full Text
Peer Reviewed
See detailMassive transfusion in critical haemorrhage following trauma: Aren’t we missing something?
TONGLET, Martin ULg

in Journal of Emergency Medicine, Trauma and Acute Care (2016), 5

Detailed reference viewed: 18 (5 ULg)
Full Text
Peer Reviewed
See detailKidney-Failure Risk Projection for the Living Kidney-Donor candidate.
DELANAYE, Pierre ULg; Glassock, Richard

in New England Journal of Medicine (2016), 374(21), 2093-2094

Detailed reference viewed: 22 (3 ULg)
Full Text
Peer Reviewed
See detailLocalized Eruptive Blue Nevi after Herpes Zoster
COLSON, Fany ULg; ARRESE ESTRADA, Jorge ULg; NIKKELS, Arjen ULg

in Case Reports in Dermatology (2016)

A 52-year-old White man presented with a dozen small, well-restricted, punctiform, asymptomatic, blue-gray macules on the left shoulder. A few months earlier, he had been treated with oral acyclovir for ... [more ▼]

A 52-year-old White man presented with a dozen small, well-restricted, punctiform, asymptomatic, blue-gray macules on the left shoulder. A few months earlier, he had been treated with oral acyclovir for herpes zoster (HZ) affecting the left C7–C8 dermatomes. All the blue macules appeared over a short period of time and then remained stable. The patient had not experienced any previous trauma or had tattooing in this anatomical region. The clinical diagnosis suggested blue nevi. Dermatoscopy revealed small, well-limited, dark-blue, compact, homogeneous areas evoking dermal blue nevi. An excisional biopsy was performed and the histological examination confirmed a blue nevus. As far as we are aware of, this is the first report of eruptive blue nevi following HZ, and it should be included in the differential diagnosis of zosteriform dermatoses responding to an isotopic pathway. In addition, a brief review concerning eruptive nevi is presented. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailRaised serum levels of IGFBP-1 and IGFBP-2 in idiopathic pulmonary fibrosis.
GUIOT, Julien ULg; Bondue, B.; HENKET, Monique ULg et al

in BMC pulmonary medicine (2016), 16(1), 86

BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic lung disorder of unknown origin, which ultimately leads to death. Several growth factors such as IGFs (insulin-like-growth factor) and IGFBPs ... [more ▼]

BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic lung disorder of unknown origin, which ultimately leads to death. Several growth factors such as IGFs (insulin-like-growth factor) and IGFBPs (insulin like growth factor binding proteins) seem to take part to the pathogenesis. We evaluated IGFs and IGFBPs in serum from patients with IPF and healthy subjects including 24 untreated IPF and 26 IPF receiving anti-fibrotic therapy and to compare them with healthy subjects. METHODS: Serum of 50 idiopathic pulmonary fibrosis and 55 healthy subjects (HS) were analysed by ELISA for IGFs and IGFBPs, TGF-beta and KL-6, the latter being tested as positive control in IPF. RESULTS: Serum levels of IGFBP-1 and IGFBP-2 and KL-6 were significantly higher in the IPF group than in the healthy subjects (p < 0.05, p < 0.001 and p < 0.0001 respectively) while the picture was inversed regarding IGFs. By contrast there was no significant difference between the groups with respect to TGF-beta. IGFBP-2 was significantly reduced in the patients with specific anti-fibrotic therapy pirfenidone and nintedanib compared to untreated patients (p < 0.05) but still significantly elevated in comparison to HS (p < 0.001). CONCLUSION: Serum IGFBP-1 and -2 are increased in idiopathic pulmonary fibrosis and IGFBP-2 may be reduced by anti-fibrosing therapy. IGFBPs may be promising biomarkers in IPF. [less ▲]

Detailed reference viewed: 45 (3 ULg)
Full Text
Peer Reviewed
See detailCP-conserving multi-Higgs model with irremovable complex coefficients
Ivanov, Igor ULg; Silva, Joao

in Physical Review. D : Particles and Fields (2016), 93(9), 095014

Models beyond the Standard Model (bSM) often involve elaborate Higgs sectors, which can be a source of CP violation. It brings up the question of recognizing in an efficient way whether a model is CP ... [more ▼]

Models beyond the Standard Model (bSM) often involve elaborate Higgs sectors, which can be a source of CP violation. It brings up the question of recognizing in an efficient way whether a model is CP violating. There is a diffuse belief corroborated by all specific multi-Higgs models considered so far that the issue of explicit CP invariance can be linked to the existence of a basis in which all coefficients are real. Here, we prove that this belief is not justified. We present a CP-conserving three-Higgs-doublet model for which no real basis exists. The generalized CP symmetry of this model is of order 4, which leads to the peculiar property of the extra neutral Higgs bosons of being neither CP-even nor CP-odd but “half-odd” under this symmetry transformation. [less ▲]

Detailed reference viewed: 6 (1 ULg)
Full Text
Peer Reviewed
See detailHow Bees Deter Elephants: Beehive Trials with Forest Elephants (Loxodonta africana cyclotis) in Gabon
Ngama, Steeve ULg; Korte, Lisa; Bindelle, Jérôme ULg et al

in PLoS ONE (2016), 11(5), 12

In Gabon, like elsewhere in Africa, crops are often sources of conflict between humans and wildlife. Wildlife damage to crops can drastically reduce income, amplifying poverty and creating a negative ... [more ▼]

In Gabon, like elsewhere in Africa, crops are often sources of conflict between humans and wildlife. Wildlife damage to crops can drastically reduce income, amplifying poverty and creating a negative perception of wild animal conservation among rural people. In this context, crop-raiding animals like elephants quickly become “problem animals”. To deter elephants from raiding crops beehives have been successfully employed in East Africa; however, this method has not yet been tested in Central Africa. We experimentally examined whether the presence of Apis mellifera adansonii, the African honey bee species present in Central Africa, deters forest elephants (Loxodonta Africana cyclotis) from feeding on fruit trees. We show for the first time that the effectiveness of beehives as deterrents of elephants is related to bee activity. Empty hives and those housing colonies of low bee activity do not deter elephants all the time; but beehives with high bee activity do. Although elephant disturbance of hives does not impede honey production, there is a tradeoff between deterrence and the quantity of honey produced. To best achieve the dual goals of deterring elephants and producing honey colonies must maintain an optimum activity level of 40 to 60 bee movements per minute. Thus, beehives colonized by Apis mellifera adansonii bees can be effective elephant deterrents, but people must actively manage hives to maintain bee colonies at the optimum activity level. [less ▲]

Detailed reference viewed: 138 (14 ULg)
Full Text
Peer Reviewed
See detailDo evoked potentials contribute to the functional follow-up and clinical prognosis of multiple sclerosis?
GIFFROY, Xavier ULg; MAES, Nathalie ULg; Albert, Adelin ULg et al

in Acta Neurologica Belgica (2016)

The clinical variability and complexity of multiple sclerosis (MS) challenges the individual clinical course prognostication. This study aimed to find out whether multimodal evoked potentials (EP ... [more ▼]

The clinical variability and complexity of multiple sclerosis (MS) challenges the individual clinical course prognostication. This study aimed to find out whether multimodal evoked potentials (EP) correlate with the motor components of multiple sclerosis functional composite (MSFCm) and predict clinically relevant motor functional deterioration. One hundred MS patients were assessed at baseline (T0) and about 7.5 years later (T1), with visual, somatosensory and motor EP and rated on the Expanded Disability Status Scale (EDSS) and the MSFCm, including the 9 Hole Peg Test and the Timed 25 Foot Walk (T25FW). The Spearman correlation coefficient (rS) was used to evaluate the cross-sectional and longitudinal relationship between EP Z scores and clinical findings. The predictive value of baseline electrophysiological data for clinical worsening (EDSS, 9-HPT, T25FW, MSFCm) during follow-up was assessed by logistic regression analysis. Unlike longitudinal correlations, cross-sectional correlations between EP Z scores and clinical outcomes were all significant and ranged between 0.22 and 0.67 (p\0.05). The global EP Z score was systematically predictive of EDSS and MSFCm worsening over time (all p\0.05). EP latency was a better predictor than amplitude, although weaker than latency and amplitude aggregation in the global EP Z score. The study demonstrates that EP numerical scores can be used for motor function monitoring and outcome prediction in patients with MS. [less ▲]

Detailed reference viewed: 38 (5 ULg)
Full Text
Peer Reviewed
See detailQuantum calculation of the Vavilov-Cherenkov radiation by twisted electrons
Ivanov, Igor ULg; Serbo, Valery; Zaytsev, Vladimir

in Physical Review A (2016), 93

We present a detailed quantum electrodynamical description of Vavilov-Cherenkov radiation emitted by a relativistic twisted electron in the transparent medium. Simple expressions for the spectral and ... [more ▼]

We present a detailed quantum electrodynamical description of Vavilov-Cherenkov radiation emitted by a relativistic twisted electron in the transparent medium. Simple expressions for the spectral and spectral-angular distributions as well as for the polarization properties of the emitted radiation are obtained. Unlike the plane-wave case, the twisted electron produces radiation within the annular angular region, with enhancement towards its boundaries. Additionally, the emitted photons can have linear polarization not only in the scattering plane but also in the orthogonal direction. We find that the Vavilov-Cherenkov radiation emitted by an electron in a superposition of two vortex states exhibits a strong azimuthal asymmetry. Thus, the Vavilov-Cherenkov radiation offers itself as a convenient diagnostic tool of such electrons and complements the traditional microscopic imaging. [less ▲]

Detailed reference viewed: 13 (2 ULg)
Full Text
Peer Reviewed
See detailExtracellular vesicles in blood, milk and body fluids of the female and male urogenital tract and with special regard to reproduction
Foster, Brandon; Balassa, Timea; Benen, Thomas et al

in Critical Reviews in Clinical Laboratory Sciences (2016)

Detailed reference viewed: 70 (6 ULg)
Full Text
Peer Reviewed
See detailOrbital, spin state and thermophysical characterization of near-Earth asteroid (3200) Phaethon
Hanus, Josef; Delbo, Marco; Vokrouhlický, D. et al

in Astronomy and Astrophysics (2016)

The near-Earth asteroid (3200) Phaethon is an intriguing object: its perihelion is only at 0.14 au and is associated with the Geminid meteor stream. We aim to use all available disk-integrated optical ... [more ▼]

The near-Earth asteroid (3200) Phaethon is an intriguing object: its perihelion is only at 0.14 au and is associated with the Geminid meteor stream. We aim to use all available disk-integrated optical data to derive reliable convex shape model of Phaethon. By interpreting the available space- and ground-based thermal infrared data and Spitzer spectra using a thermophysical model, we also aim to further constrain its size, thermal inertia, and visible geometric albedo. We apply the convex inversion method to the new optical data obtained by six instruments together with the already existing observations. The convex shape model is then used as an input for the thermophysical modeling. We also study the long-term stability of Phaethon’s orbit and spin axis by a numerical orbital and rotation-state integrator We present a new convex shape model and rotational state of Phaethon – sidereal rotation period of 3.603958(2) h and ecliptic coordinates of the preferred pole orientation of (319◦ , −39◦) with a 5◦ uncertainty. Moreover, we derive its size (D=5.1±0.2 km), thermal inertia (Γ=600±200 J m-2s -1/2K -1), geometric visible albedo (pV=0.122±0.008), and estimate the macroscopic surface roughness. We also find that the Sun illumination at the perihelion passage during past thousands of years is not connected to a specific area on the surface implying non-preferential heating. [less ▲]

Detailed reference viewed: 11 (3 ULg)
Full Text
Peer Reviewed
See detailA New Approach for the Characterization of Organic Residues from Stone Tools Using GC×GC-TOFMS
Perrault, Katelynn ULg; Stefanuto, Pierre-Hugues ULg; Dubois, Lena ULg et al

in Separations (2016), 3(2), 16

Headspace solid-phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) have traditionally been used, in combination with other analyses, for the chemical characterization of ... [more ▼]

Headspace solid-phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) have traditionally been used, in combination with other analyses, for the chemical characterization of organic residues recovered from archaeological specimens. Recently in many life science fields, comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC×GC-TOFMS) has provided numerous benefits over GC-MS. This study represents the first use of HS-SPME-GC×GC-TOFMS to characterize specimens from an experimental modern reference collection. Solvent extractions and direct analyses were performed on materials such as ivory, bone, antlers, animal tissue, human tissue, sediment, and resin. Thicker film column sets were preferred due to reduced column overloading. The samples analyzed by HS-SPME directly on a specimen appeared to give unique signatures and generally produced a higher response than for the solvent-extracted residues. A non-destructive screening approach of specimens may, therefore, be possible. Resin and beeswax mixtures prepared by heating for different lengths of time appeared to provide distinctly different volatile signatures, suggesting that GC×GC-TOFMS may be capable of differentiating alterations to resin in future studies. Further development of GC×GC-TOFMS methods for archaeological applications will provide a valuable tool to uncover significant information on prehistoric technological changes and cultural behavior. [less ▲]

Detailed reference viewed: 40 (10 ULg)
Full Text
Peer Reviewed
See detailEmbargo on Lion Hunting Trophies from West Africa: An Effective Measure or a Threat to Lion Conservation ?
Bouché, Philippe; Crosmary, William; Kafando, Pierre et al

in PLoS ONE (2016), 11(5), 0155763

The W-Arly-Pendjari (WAP) ecosystem, shared among Benin, Burkina Faso and Niger, represents the last lion stronghold of West Africa. To assess the impact of trophy hunting on lion populations in hunting ... [more ▼]

The W-Arly-Pendjari (WAP) ecosystem, shared among Benin, Burkina Faso and Niger, represents the last lion stronghold of West Africa. To assess the impact of trophy hunting on lion populations in hunting areas of the WAP, we analyzed trends in harvest rates from 1999 to 2014. We also investigated whether the hunting areas with higher initial hunting intensity experienced steeper declines in lion harvest between 1999 and 2014, and whether lion densities in hunting areas were lower than in national parks. Lion harvest rate remained overall constant in the WAP. At initial hunting intensities below 1.5 lions/1000km2, most hunting areas experienced an increase in lion harvest rate, although that increase was of lower magnitude for hunting areas with higher initial hunting intensity. The proportion of hunting areas that experienced a decline in lion harvest rate increased at initial hunting intensities above 1.5 lions/1000km2. In 2014, the lion population of the WAP was estimated with a spoor count at 418 (230–648) adults and sub-adult individuals, comparable to the 311 (123–498) individuals estimated in the previous 2012 spoor survey. We found no significant lion spoor density differences between national parks and hunting areas. Hunting areas with higher mean harvest rates did not have lower lion densities. The ratio of large adult males, females and sub-adults was similar between the national parks and the hunting areas. These results suggested that the lion population was not significantly affected by hunting in the WAP. We concluded that a quota of 1 lion/1000km2 would be sustainable for the WAP. Based on our results, an import embargo on lion trophies from the WAP would not be justified. It could ruin the incentive of local actors to conserve lions in hunting areas, and lead to a drastic reduction of lion range in West Africa. [less ▲]

Detailed reference viewed: 74 (7 ULg)
Full Text
Peer Reviewed
See detailFare filosofia in Italia nel XXI secolo
Boccaccini, Federico ULg

in Che fare. Cultura e innovazione (2016)

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailEfficacy of the RemoweLL cardiotomy reservoir for fat and leucocyte removal from shed mediastinal blood: a randomized controlled trial.
LAGNY, Marc-Gilbert ULg; GOTHOT, André ULg; HANS, Grégory ULg et al

in Perfusion (2016)

Efficacy of the RemoweLL cardiotomy reservoir for Fat and Leucocyte removal from shed mediastinal blood: a randomized controlled trial. ABSTRACT (176 words) Introduction Re-transfusion of lipid particles ... [more ▼]

Efficacy of the RemoweLL cardiotomy reservoir for Fat and Leucocyte removal from shed mediastinal blood: a randomized controlled trial. ABSTRACT (176 words) Introduction Re-transfusion of lipid particles and activated leucocytes with shed mediastinal blood (SMB) can aggravate cardiopulmonary bypass-associated inflammation and increase the embolic load. This study evaluated the fat and leucocyte removal capacity of the RemoweLL cardiotomy reservoir. Methods Forty-five patients undergoing elective on-pump cardiac surgery were randomly allocated to filtration of SMB using the RemoweLL or the Admiral cardiotomy reservoir. The primary outcome was the drop in leucocytes and lipid particles obtained with the two filters. The effect of the filters on other blood cells and inflammatory mediators such as myeloperoxidase (MPO) was also assessed. Results The RemoweLL cardiotomy filter removed 16.5 % of the leucocytes (P < 0.001) while no significant removal of leucocytes was observed with the Admiral (P = 0.48). The percentage reductions in lipid particles were similar in the two groups (26% vs 23 %, P = 0.2). Both filters similarly affected the level of MPO (P = 0.71). Discussion The RemoweLL filter more effectively removed leucocytes from SMB than the Admiral. It offered no advantage in term of lipid particle clearance. [less ▲]

Detailed reference viewed: 29 (11 ULg)
Full Text
Peer Reviewed
See detailFeasibility evaluation of prone breast irradiation with the Sagittilt© system including residual-intrafractional error assessment
Lakosi, Ferenc; GULYBAN, Akos ULg; BEN MUSTAPHA, Selma ULg et al

in Cancer Radiotherapie (2016), 3429

Purpose:Feasibility evaluation of the Sagittilt© prone breast board system (Orfit Industries, Wijnegem, Belgium) for radiotherapy focusing on patient and staff satisfaction, treatment time, treatment ... [more ▼]

Purpose:Feasibility evaluation of the Sagittilt© prone breast board system (Orfit Industries, Wijnegem, Belgium) for radiotherapy focusing on patient and staff satisfaction, treatment time, treatment reproducibility with the assessment of residual-intrafractional errors. Material and methods: Thirty-six patients underwent whole-breast irradiation in prone position. Seventeen received a sequential boost (breast: 42.56 Gy in 16 fractions, boost: 10 Gy in five fractions), while 19 patients received a concomitant boost protocol (breast/boost: 45.57/55.86 Gy in 21 fractions). Treatment verification included a daily online cone-beam CT (CBCT). In order to assess the residual and residual-intrafractional errors post-treatment CBCTs were performed systematically at the first five treatment sessions. Treatment time, patient comfort, staff satisfaction were also evaluated. Results: The pretreatment CBCT resulted in a population systematic error of 4.5/3.9/3.3 mm in lateral/longitudinal/vertical directions, while the random error was 5.4/3.8/2.8 mm. Without correction these would correspond to a clinical to planning target volume margin of 15.0/12.3/10.3 mm. The population systematic and random residual-intrafractional errors were 1.5/0.9/1.7 mm and 1.7/1.9/1.6 mm. Patient and staffs’ satisfaction were considered good and average. The mean treatment session time was 21 minutes (range: 13–40 min). Conclusion: The Sagittilt© system seems to be feasible for breast irradiation and well-tolerated by patients, acceptable to radiographers and reasonable in terms of treatment times. Set-up accuracy was comparable with other prone systems; residual errors need further investigations. [less ▲]

Detailed reference viewed: 14 (2 ULg)
Full Text
Peer Reviewed
See detailSpiral waves triggered by shadows in transition disks
Montesinos, Matias; Pérez, Sebastian; Casassus, Simon et al

in Astrophysical Journal Letters (2016)

Circumstellar asymmetries such as central warps have recently been shown to cast shadows on outer disks. We investigate the hydrodynamical consequences of such variable illumination on the outer regions ... [more ▼]

Circumstellar asymmetries such as central warps have recently been shown to cast shadows on outer disks. We investigate the hydrodynamical consequences of such variable illumination on the outer regions of a transition disk, and the development of spiral arms. Using 2D simulations, we follow the evolution of a gaseous disk passively heated by the central star, under the periodic forcing of shadows with an opening angle of $\sim$28$^\circ$. With a lower pressure under the shadows, each crossing results in a variable azimuthal acceleration, which in time develops into spiral density waves. Their pitch angles evolve from $\Pi \sim 15^\circ-22^\circ$ at the onset, to $\sim$11$^\circ$-14$^\circ$, over $\sim$65~AU to 150~AU. Self-gravity enhances the density contrast of the spiral waves, as also reported previously for spirals launched by planets. Our control simulations with unshadowed irradiation do not develop structures, except for a different form of spiral waves seen at later times only in the gravitationally unstable control case. Scattered light predictions in the $H$-band show that such illumination spirals should be observable. We suggest that spiral arms in the case-study transition disk HD~142527 could be explained as a result of shadowing from the tilted inner disk. [less ▲]

Detailed reference viewed: 20 (3 ULg)
Full Text
Peer Reviewed
See detailQuelles sont les causes de la déforestation dans le bassin du Congo ? Synthèse bibliographique et études de cas
Gillet, Pauline ULg; Vermeulen, Cédric ULg; Feintrenie, Laurène et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016), 20(2), 183-194

Les forêts du Bassin du Congo font partie des zones forestières les mieux préservées de la planète. Néanmoins, les facteurs qui entrainent la déforestation ailleurs dans le monde se manifestent également ... [more ▼]

Les forêts du Bassin du Congo font partie des zones forestières les mieux préservées de la planète. Néanmoins, les facteurs qui entrainent la déforestation ailleurs dans le monde se manifestent également dans cette sous-région du globe. Cet article propose une revue de la littérature des causes directes et des facteurs sous-jacents de la destruction du couvert forestier des régions tropicales, afin de mettre en exergue les moteurs de la déforestation dans le bassin du Congo, et plus particulièrement au Cameroun et au Gabon. Littérature. Les causes directes de déforestation, définies comme ayant un lien cause-conséquence immédiat avec la destruction du couvert forestier, sont renforcées par des facteurs sous-jacents tels que les facteurs économiques, les avancées technologiques, les mesures politiques ainsi que les pressions démographiques. Toutes ces causes interagissent de façons distinctes dans les différentes régions tropicales de par le monde et expliquent les divergences et similitudes entre les dynamiques de déforestation régionales. En plus de l’expansion de l’infrastructure, du développement du secteur minier et de l’extraction du bois, l’agriculture représente la cause directe de déforestation la plus importante dans le bassin du Congo. Au Cameroun, la déforestation actuelle est principalement liée à l’agriculture. Le plan d’émergence de ce pays prévoit le développement des infrastructures, la modernisation de l’appareil de production national ainsi que l’exploitation minière. Au Gabon, le taux de déforestation plus faible s’explique par la dynamique agricole et l’ouverture des routes. Le plan d’émergence ambitieux y prévoit la modernisation de l’infrastructure ainsi que le développement de l’agriculture agro-industrielle. Conclusions. Une mutation des socio-écosystèmes liée à la déforestation est attendue en différents points du bassin du Congo. Les recherches futures devraient maintenant aborder la description de socio-écosystèmes types représentant les différents stades de la transition forestière ainsi que l’identification des facteurs du changement à différentes échelles. [less ▲]

Detailed reference viewed: 336 (12 ULg)
Full Text
Peer Reviewed
See detailWhat Are the Impacts of Deforestation on the Harvest of Non-Timber Forest Products in Central Africa?
Gillet, Pauline ULg; Vermeulen, Cédric ULg; Doucet, Jean-Louis ULg et al

in Forests (2016), 7(5),

The objective of the study is to evaluate the impact of forest transition on non-timber forest product (NTFP) harvesting in Central Africa. We analyze the evolution of several parameters, including ... [more ▼]

The objective of the study is to evaluate the impact of forest transition on non-timber forest product (NTFP) harvesting in Central Africa. We analyze the evolution of several parameters, including distance from NTFP harvest site to road, proportion of dietary intake and villagers’ incomes. The research is based on field surveys, participatory mapping and the geolocation of activities in three study sites representing different stages along the Mather’s forest transition curve: (i) intact forest; (ii) partially degraded forest; and (iii) small areas of degraded forest with plantations of useful trees. The results show that the maximum distance from harvest site to road is higher in Site 2 compared to Site 1 as a consequence of a lower availability of NTFPs; and that this distance is significantly lower in Site 3 due to a drastically smaller village territory. The diversity of bushmeat decreases as game evolves from large to small species, commensurate with the progression of forest transition. As a consequence, there is also a reduction in the proportion of these products represented both in household dietary intake and cash income. This analysis establishes a strong link between the Mather’s forest transition curve and a decline in the importance of NTFPs in village production and livelihoods. [less ▲]

Detailed reference viewed: 151 (10 ULg)
Full Text
Peer Reviewed
See detailThe determinants of tropical forest deciduousness: disentangling the effects of rainfall and geology in central Africa
Ouedraogo, Dakis-Yaoba ULg; Fayolle, Adeline ULg; Gourlet-Fleury, Sylvie et al

in Journal of Ecology (2016)

1. Understanding the environmental determinants of forests deciduousness i.e. proportion of deciduous trees in a forest stand, is of great importance when predicting the impact of ongoing global climate ... [more ▼]

1. Understanding the environmental determinants of forests deciduousness i.e. proportion of deciduous trees in a forest stand, is of great importance when predicting the impact of ongoing global climate change on forests. In this study, we examine (i) how forest deciduousness varies in relation to rainfall and geology, and (ii) whether the influence of geology on deciduousness could be related to differences in soil fertility and water content between geological substrates. 2. The study was conducted in mixed moist semi-deciduous forests in the northern part of the Congo basin. We modelled the response of forest deciduousness to the severity of the dry season across four contrasting geological substrates (sandstone, alluvium, metamorphic and basic rocks). For this, we combined information on forest composition at genus level based on commercial forest inventories (62 624 0.5 ha plots scattered over 6 million of ha), leaf habit, and rainfall and geological maps. We further examined whether substrates differ in soil fertility and water-holding capacity using soil data from 37 pits in an area that was, at the time, relatively unexplored. 3. Forest deciduousness increased with the severity of the dry season, and this increase strongly varied with the geological substrate. Geology was found to be three times more important than the rainfall regime in explaining the total variation in deciduousness. The four substrates differed in soil properties, with higher fertility and water-holding capacity on metamorphic and basic rocks than on sandstone and alluvium. The increase in forest deciduousness was stronger on the substrates that formed resource-rich clay soils (metamorphic and basic rocks) than on substrates that formed resource-poor sandy soils (sandstone and alluvium). 4. Synthesis. We found evidence that tropical forest deciduousness is the result of both the competitive advantage of deciduous species in climates with high rainfall seasonality, and the persistence of evergreen species on resource-poor soils. Our findings offer a clear illustration of wellknown theoretical leaf carbon economy models, explaining the patterns in the dominance of evergreen versus deciduous species. And, this large-scale assessment of the interaction between climate and geology in determining forest deciduousness may help to improve future predictions of vegetation distribution under climate change scenarios. In central Africa, forest is likely to respond differently to variation in rainfall and/or evapotranspiration depending on the geological substrate. [less ▲]

Detailed reference viewed: 77 (8 ULg)
Full Text
Peer Reviewed
See detailEnhancing Spatio-Temporal Identity: States of Existence and Presence
Hallot, Pierre ULg; Billen, Roland ULg

in International Journal of Geo-Information (2016), 5(62),

This work presents a new approach that aims to characterize the spatio-temporal relationships that exist between geographical objects that are absent or non-existent at the moment of analysis. First, we ... [more ▼]

This work presents a new approach that aims to characterize the spatio-temporal relationships that exist between geographical objects that are absent or non-existent at the moment of analysis. First, we would like to propose a formal analysis of the spatio-temporal states of presence and existence of a geographical object. We will then use a combination of these states in order to define a set of life and motion configurations. The model developed then serves as a formal basis for the realization of a series of spatio-temporal queries based on an analysis of patterns in the succession of spatio-temporal states. The entire approach is then demonstrated by using the example of the organization of a scientific conference by defining the spatio-temporal relationships between the conference participants. The research methodology is finally compared with a real dataset taken from a geolocalized social network to show the efficiency of this type of management. [less ▲]

Detailed reference viewed: 57 (12 ULg)
Full Text
Peer Reviewed
See detailModelling the mortality of Hylotrupes bajulus (L.) larvae exposed to anoxic treatment for disinfestation of wooden art objects
de Streel, Géraud; Henin, Jean-Marc; Bogaert, Patrick et al

in Wood Science & Technology (2016)

Experiments were conducted to quantify the effect of several variables on the mortality of insects exposed to an anoxic treatment in order to generate a model linking mortality to these variables. This ... [more ▼]

Experiments were conducted to quantify the effect of several variables on the mortality of insects exposed to an anoxic treatment in order to generate a model linking mortality to these variables. This study aims to explore the possible interest of using such a model to determine the characteristics of treatment (especially duration) needed to guarantee insect mortality with a given level of probability. Trials were performed on Hylotrupes bajulus larvae, which is a widespread species known for its high tolerance to anoxic conditions. The studied variables are the initial mass of the larvae, the treatment temperature (21, 30 and 40 C), the treatment duration (four durations for each temperature tested) and whether the larva is held in wood or in a petri dish (directly exposed to anoxic atmosphere) during the experiment. It was found that, while the last variable is not correlated with mortality, treatment duration and temperature are significantly and positively correlated with it. Larvae with higher body mass were also shown to have a better resistance to the treatment. Based on these results, a model including insect initial mass, treatment temperature and duration, together with the interaction between these two variables, was determined. This relatively simple model appeared to be a useful tool in overcoming the difficulty in defining the modalities for anoxic treatment in order to reach a given level of mortality. [less ▲]

Detailed reference viewed: 34 (3 ULg)
Full Text
Peer Reviewed
See detailA new classification of earthquake-induced landslide event sizes based on seismotectonic, topographic, climatic and geologic factors
Havenith, Hans-Balder ULg; Torgoev, Almazbek ULg; Braun, Anika et al

in Geoenvironmental Disasters (2016), 3(6), 2-24

Background This paper reviews the classical and some particular factors contributing to earthquake-triggered landslide activity. This analysis should help predict more accurately landslide event sizes ... [more ▼]

Background This paper reviews the classical and some particular factors contributing to earthquake-triggered landslide activity. This analysis should help predict more accurately landslide event sizes, both in terms of potential numbers and affected area. It also highlights that some occurrences, especially those very far from the hypocentre/activated fault, cannot be predicted by state-of-the-art methods. Particular attention will be paid to the effects of deep focal earthquakes in Central Asia and to other extremely distant landslide activations in other regions of the world (e.g. Saguenay earthquake 1988, Canada). Results The classification of seismically induced landslides and the related ‘event sizes’ is based on five main factors: ‘Intensity’, ‘Fault factor’, ‘Topographic energy’, ‘Climatic background conditions’, ‘Lithological factor’. Most of these data were extracted from papers, but topographic inputs were checked by analyzing the affected region in Google Earth. The combination and relative weight of the factors was tested through comparison with well documented events and complemented by our studies of earthquake-triggered landslides in Central Asia. The highest relative weight (6) was attributed to the ‘Fault factor’; the other factors all received a smaller relative weight (2–4). The high weight of the ‘Fault factor’ (based on the location in/outside the mountain range, the fault type and length) is strongly constrained by the importance of the Wenchuan earthquake that, for example, triggered far more landslides in 2008 than the Nepal earthquake in 2015: the main difference is that the fault activated by the Wenchuan earthquake created an extensive surface rupture within the Longmenshan Range marked by a very high topographic energy while the one activated by the Nepal earthquake ruptured the surface in the frontal part of the Himalayas where the slopes are less steep and high. Finally, the calibrated factor combination was applied to almost 100 other earthquake events for which some landslide information was available. This comparison revealed the ability of the classification to provide a reasonable estimate of the number of triggered landslides and of the size of the affected area. According to this prediction, the most severe earthquake-triggered landslide event of the last one hundred years would actually be the Wenchuan earthquake in 2008 followed by the 1950 Assam earthquake in India – considering that the dominating role of the Wenchuan earthquake data (including the availability of a complete landslide inventory) for the weighting of the factors strongly influences and may even bias this result. The strongest landslide impacts on human life in recent history were caused by the Haiyuan-Gansu earthquake in 1920 – ranked as third most severe event according to our classification: its size is due to a combination of high shaking intensity, an important ‘Fault factor’ and the extreme susceptibility of the regional loess cover to slope failure, while the surface morphology of the affected area is much smoother than the one affected by the Wenchuan 2008 or the Nepal 2015 earthquakes. Conclusions The main goal of the classification of earthquake-triggered landslide events is to help improve total seismic hazard assessment over short and longer terms. Considering the general performance of the classification-prediction, it can be seen that the prediction either fits or overestimates the known/observed number of triggered landslides for a series of earthquakes, while it often underestimates the size of the affected area. For several events (especially the older ones), the overestimation of the number of landslides can be partly explained by the incompleteness of the published catalogues. The underestimation of the extension of the area, however, is real – as some particularities cannot be taken into account by such a general approach: notably, we used the same seismic intensity attenuation for all events, while attenuation laws are dependent on regional tectonic and geological conditions. In this regard, it is likely that the far-distant triggering of landslides, e.g., by the 1988 Saguenay earthquake (and the related extreme extension of affected area) is due to a very low attenuation of seismic energy within the North American plate. Far-distant triggering of landslides in Central Asia can be explained by the susceptibility of slopes covered by thick soft soils to failure under the effect of low-frequency shaking induced by distant earthquakes, especially by the deep focal earthquakes in the Pamir – Hindukush seismic region. Such deep focal and high magnitude (> > 7) earthquakes are also found in Europe, first of all in the Vrancea region (Romania). For this area as well as for the South Tien Shan we computed possible landslide event sizes related to some future earthquake scenarios. [less ▲]

Detailed reference viewed: 33 (1 ULg)
Full Text
Peer Reviewed
See detailScattering theory of walking droplets in the presence of obstacles
Dubertrand, Rémy ULg; Hubert, Maxime ULg; Schlagheck, Peter ULg et al

in New Journal of Physics (2016), 18

We aim to describe a droplet bouncing on a vibrating bath using a simple and highly versatile model inspired from quantum mechanics. Close to the Faraday instability, a long-lived surface wave is created ... [more ▼]

We aim to describe a droplet bouncing on a vibrating bath using a simple and highly versatile model inspired from quantum mechanics. Close to the Faraday instability, a long-lived surface wave is created at each bounce, which serves as a pilot wave for the droplet. This leads to so called walking droplets or walkers. Since the seminal experiment by {\it Couder et al} [Phys. Rev. Lett. {\bf 97}, 154101 (2006)] there have been many attempts to accurately reproduce the experimental results. We propose to describe the trajectories of a walker using a Green function approach. The Green function is related to the Helmholtz equation with Neumann boundary conditions on the obstacle(s) and outgoing boundary conditions at infinity. For a single-slit geometry our model is exactly solvable and reproduces some general features observed experimentally. It stands for a promising candidate to account for the presence of arbitrary boundaries in the walker's dynamics. [less ▲]

Detailed reference viewed: 36 (8 ULg)
Full Text
Peer Reviewed
See detailUpdated $1/N_c$ expansion analysis of $[56,2^+]$ and $[70,\ell^+]$ baryon multiplets
Matagne, Nicolas ULg; Stancu, Floarea ULg

in Physical Review. D : Particles and Fields (2016), 93

The mass spectra of the $[{\bf 56, 2^+}]$ and $[{\bf 70, \ell+}]$ multiplets, both belonging to the $N$ = 2 band, is reviewed in the $1/N_c$ expansion method. Previous studies, separately made for each ... [more ▼]

The mass spectra of the $[{\bf 56, 2^+}]$ and $[{\bf 70, \ell+}]$ multiplets, both belonging to the $N$ = 2 band, is reviewed in the $1/N_c$ expansion method. Previous studies, separately made for each multiplet, are presently updated to the 2014 Particle Data Group. The mass formula including corrections up to $\mathcal{O}(1/N_c)$ and first order in SU(3) flavor symmetry breaking, has the same independent operator basis in both cases. A special emphasis is made on the role of the SU(3) symmetry breaking operators $B_i$ $(i = 1,2,3)$. This can allow for multiplet assignment of $\Lambda$ and $\Sigma$ hyperons, which generally is quite difficult to make. Tentative assignments of hyperons with two- and one-star resonances are made to the $[{\bf 70, \ell+}]$ multiplet. Another important aim is to find out whether or not a common value of the coefficient $c_1$ of the dominant operator in the mass formula, can well fit the present data in both multiplets. A negative answer, which is here the case, implies distinct Regge trajectories for symmetric and mixed symmetric states. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailMechanisms involved in pearlfish resistance to holothuroid toxins
Brasseur, Lola; Parmentier, Eric ULg; Caulier, Guillaume et al

in Marine Biology (2016), 163(129), 1-14

Detailed reference viewed: 26 (9 ULg)
Full Text
Peer Reviewed
See detailSteel hollow columns with an internal profile filled with self-compacting concrete under fire conditions
Chu, Thi Binh; Gernay, Thomas ULg; Dotreppe, Jean-Claude ULg et al

in Proceeding of the Romanian Academy. Series A, Mathematics, Physics, Technical Sciences, Information Science (2016), 17(2), 152-159

A detailed experimental and numerical investigation has been performed on the behavior under fire conditions of concrete filled steel hollow section (CFSHS) columns. In this study the internal ... [more ▼]

A detailed experimental and numerical investigation has been performed on the behavior under fire conditions of concrete filled steel hollow section (CFSHS) columns. In this study the internal reinforcement consists of another profile (tube or H section) being embedded with the concrete, and filling is realized by self-compacting concrete (SCC). Ten columns filled with self-compacting concrete embedding another steel profile have been tested in the Fire Testing Laboratory of the University of Liege, Belgium. Numerical simulations on the thermal and structural behavior of these elements have been made using the non linear finite element software SAFIR developed at the University of Liege. There is a rather good agreement between numerical and experimental results, which can be slightly improved by using the ETC (Explicit Transient Creep) model incorporated in SAFIR. This shows that numerical analyses can predict well the behavior of CFSHS columns under fire conditions. The properties at high temperatures of self-compacting concrete are considered the same as those of ordinary concrete. [less ▲]

Detailed reference viewed: 155 (44 ULg)
Full Text
Peer Reviewed
See detailTemperate Earth-sized planets transiting a nearby ultracool dwarf star
Gillon, Michaël ULg; Jehin, Emmanuel ULg; Lederer, Susan M. et al

in Nature (2016), 533

Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ‘ultracool dwarfs’. This heterogeneous group includes stars of extremely low mass as well as brown dwarfs ... [more ▼]

Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ‘ultracool dwarfs’. This heterogeneous group includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain hydrogen fusion), and represents about 15 per cent of the population of astronomical objects near the Sun. Core-accretion theory predicts that, given the small masses of these ultracool dwarfs, and the small sizes of their protoplanetary disks, there should be a large but hitherto undetected population of terrestrial planets orbiting them—ranging from metal-rich Mercury-sized planets to more hospitable volatile-rich Earth-sized planets. Here we report observations of three short-period Earth-sized planets transiting an ultracool dwarf star only 12 parsecs away. The inner two planets receive four times and two times the irradiation of Earth, respectively, placing them close to the inner edge of the habitable zone of the star. Our data suggest that 11 orbits remain possible for the third planet, the most likely resulting in irradiation significantly less than that received by Earth. The infrared brightness of the host star, combined with its Jupiter-like size, offers the possibility of thoroughly characterizing the components of this nearby planetary system. [less ▲]

Detailed reference viewed: 60 (10 ULg)
Full Text
Peer Reviewed
See detailThe X-ray light curve of the massive colliding wind Wolf-Rayet + O binary WR 21a
Gosset, Eric ULg; Nazé, Yaël ULg

in Astronomy and Astrophysics (2016), 590

Our dedicated XMM-Newton monitoring, as well as archival Chandra and Swift datasets, were used to examine the behaviour of the WN5h+O3V binary WR 21a at high energies. For most of the orbit, the X-ray ... [more ▼]

Our dedicated XMM-Newton monitoring, as well as archival Chandra and Swift datasets, were used to examine the behaviour of the WN5h+O3V binary WR 21a at high energies. For most of the orbit, the X-ray emission exhibits few variations. However, an increase in strength of the emission is seen before periastron, following a 1 /D relative trend, where D is the separation between both components. This increase is rapidly followed by a decline due to strong absorption as the Wolf-Rayet (WR) comes in front. The fitted local absorption value appears to be coherent with a mass-loss rate of about 1 × 10[SUP]-5[/SUP] M[SUB]⊙[/SUB] yr[SUP]-1[/SUP] for the WR component. However, absorption is not the only parameter affecting the X-ray emission at periastron as even the hard X-ray emission decreases, suggesting a possible collapse of the colliding wind region near to or onto the photosphere of the companion just before or at periastron. An eclipse may appear as another potential scenario, but it would be in apparent contradiction with several lines of evidence, notably the width of the dip in the X-ray light curve and the absence of variations in the UV light curve. Afterwards, the emission slowly recovers, with a strong hysteresis effect. The observed behaviour is compatible with predictions from general wind-wind collision models although the absorption increase is too shallow. Based on observations collected at ESO as well as with Swift, Chandra, and the ESA science mission XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). [less ▲]

Detailed reference viewed: 26 (3 ULg)
Full Text
Peer Reviewed
See detailPulsating hot O subdwarfs in ω Centauri: mapping a unique instability strip on the extreme horizontal branch
Randall, S. K.; Calamida, A.; Fontaine, G. et al

in Astronomy and Astrophysics (2016), 589

We present the results of an extensive survey for rapid pulsators among Extreme Horizontal Branch (EHB) stars in ω Cen. The observations performed consist of nearly 100 h of time-series photometry for ... [more ▼]

We present the results of an extensive survey for rapid pulsators among Extreme Horizontal Branch (EHB) stars in ω Cen. The observations performed consist of nearly 100 h of time-series photometry for several off-centre fields of the cluster, as well as low-resolution spectroscopy for a partially overlapping sample. We obtained photometry for some 300 EHB stars, for around half of which we are able to recover light curves of sufficient quality to either detect or place meaningful non-detection limits for rapid pulsations. Based on the spectroscopy, we derive reliable values of log g, T[SUB]eff[/SUB] and log N(He) /N(H) for 38 targets, as well as good estimates of the effective temperature for another nine targets, whose spectra are slightly polluted by a close neighbour in the image. The survey uncovered a total of five rapid variables with multi-periodic oscillations between 85 and 125 s. Spectroscopically, they form a homogeneous group of hydrogen-rich subdwarf O stars clustered between 48 000 and 54 000 K. For each of the variables we are able to measure between two and three significant pulsations believed to constitute independent harmonic oscillations. However, the interpretation of the Fourier spectra is not straightforward due to significant fine structure attributed to strong amplitude variations. In addition to the rapid variables, we found an EHB star with an apparently periodic luminosity variation of ~2700 s, which we tentatively suggest may be caused by ellipsoidal variations in a close binary. Using the overlapping photometry and spectroscopy sample we are able to map an empirical ω Cen instability strip in log g - T[SUB]eff[/SUB] space. This can be directly compared to the pulsation driving predicted from the Montréal "second-generation" models regularly used to interpret the pulsations in hot B subdwarfs. Extending the parameter range of these models to higher temperatures, we find that the region where p-mode excitation occurs is in fact bifurcated, and the well-known instability strip between 29 000-36 000 K where the rapid subdwarf B pulsators are found is complemented by a second one above 50 000 K in the models. While significant challenges remain at the quantitative level, we believe that the same κ-mechanism that drives the pulsations in hot B subdwarfs is also responsible for the excitation of the rapid oscillations observed in the ω Cen variables. Intriguingly, the ω Cen variables appear to form a unique class. No direct counterparts have so far been found either in the Galactic field, nor in other globular clusters, despite dedicated searches. Conversely, our survey revealed no ω Cen representatives of the rapidly pulsating hot B subdwarfs found among the field population, though their presence cannot be excluded from the limited sample. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere, Chile (proposal IDs 083.D-0833, 386.D-0669, 087.D-0216 and 091.D-0791).The reduced spectra are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/589/A1">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/589/A1</A> [less ▲]

Detailed reference viewed: 14 (2 ULg)
Full Text
Peer Reviewed
See detailThe Gaia-ESO Survey: Sodium and aluminium abundances in giants and dwarfs. Implications for stellar and Galactic chemical evolution
Smiljanic, R.; Romano, D.; Bragaglia, A. et al

in Astronomy and Astrophysics (2016), 589

Context. Stellar evolution models predict that internal mixing should cause some sodium overabundance at the surface of red giants more massive than ~1.5-2.0 M[SUB]⊙[/SUB]. The surface aluminium abundance ... [more ▼]

Context. Stellar evolution models predict that internal mixing should cause some sodium overabundance at the surface of red giants more massive than ~1.5-2.0 M[SUB]⊙[/SUB]. The surface aluminium abundance should not be affected. Nevertheless, observational results disagree about the presence and/or the degree of Na and Al overabundances. In addition, Galactic chemical evolution models adopting different stellar yields lead to very different predictions for the behavior of [Na/Fe] and [Al/Fe] versus [Fe/H]. Overall, the observed trends of these abundances with metallicity are not well reproduced. <BR /> Aims: We readdress both issues, using new Na and Al abundances determined within the Gaia-ESO Survey. Our aim is to obtain better observational constraints on the behavior of these elements using two samples: i) more than 600 dwarfs of the solar neighborhood and of open clusters and ii) low- and intermediate-mass clump giants in six open clusters. <BR /> Methods: Abundances were determined using high-resolution UVES spectra. The individual Na abundances were corrected for nonlocal thermodynamic equilibrium effects. For the Al abundances, the order of magnitude of the corrections was estimated for a few representative cases. For giants, the abundance trends with stellar mass are compared to stellar evolution models. For dwarfs, the abundance trends with metallicity and age are compared to detailed chemical evolution models. <BR /> Results: Abundances of Na in stars with mass below ~2.0 M[SUB]⊙[/SUB], and of Al in stars below ~3.0 M[SUB]⊙[/SUB], seem to be unaffected by internal mixing processes. For more massive stars, the Na overabundance increases with stellar mass. This trend agrees well with predictions of stellar evolutionary models. For Al, our only cluster with giants more massive than 3.0 M[SUB]⊙[/SUB], NGC 6705, is Al enriched. However, this might be related to the environment where the cluster was formed. Chemical evolution models that well fit the observed [Na/Fe] vs. [Fe/H] trend in solar neighborhood dwarfs cannot simultaneously explain the run of [Al/Fe] with [Fe/H], and vice versa. The comparison with stellar ages is hampered by severe uncertainties. Indeed, reliable age estimates are available for only a half of the stars of the sample. We conclude that Al is underproduced by the models, except for stellar ages younger than about 7 Gyr. In addition, some significant source of late Na production seems to be missing in the models. Either current Na and Al yields are affected by large uncertainties, and/or some important Galactic source(s) of these elements has as yet not been taken into account. Based on observations made with the ESO/VLT, at Paranal Observatory, under program 188.B-3002 (The Gaia-ESO Public Spectroscopic Survey), and on data obtained from the ESO Archive originally observed under programs 60.A-9143, 076.B-0263 and 082.D-0726.Table 1 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/589/A115">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/589/A115</A> [less ▲]

Detailed reference viewed: 9 (3 ULg)
Full Text
Peer Reviewed
See detailAsthma inflammatory phenotypes show differential microRNA expression in sputum.
Maes, Tania; Cobos, Francisco Avila; SCHLEICH, FLorence ULg et al

in The Journal of allergy and clinical immunology (2016), 137(5), 1433-46

BACKGROUND: Asthma is classified according to severity and inflammatory phenotype and is likely to be distinguished by specific microRNA (miRNA) expression profiles. OBJECTIVE: We sought to associate ... [more ▼]

BACKGROUND: Asthma is classified according to severity and inflammatory phenotype and is likely to be distinguished by specific microRNA (miRNA) expression profiles. OBJECTIVE: We sought to associate miRNA expression in sputum supernatants with the inflammatory cell profile and disease severity in asthmatic patients. METHODS: We investigated miRNA expression in sputum supernatants of 10 healthy subjects, 17 patients with mild-to-moderate asthma, and 9 patients with severe asthma using high-throughput, stem-loop, reverse transcriptase quantitative real-time PCR miRNA expression profiling (screening cohort, n = 36). Differentially expressed miRNAs were validated in an independent cohort (n = 60; 10 healthy subjects and 50 asthmatic patients). Cellular miRNA origin was examined by using in situ hybridization and reverse transcriptase quantitative real-time PCR. The functional role of miRNAs was assessed by using in silico analysis and in vitro transfecting miRNA mimics in human bronchial epithelial cells. RESULTS: In 2 independent cohorts expression of miR-629-3p, miR-223-3p, and miR-142-3p was significantly upregulated in sputum of patients with severe asthma compared with that in healthy control subjects and was highest in patients with neutrophilic asthma. Expression of the 3 miRNAs was associated with sputum neutrophilia, and miR-223-3p and miR-142-3p expression was associated also with airway obstruction (FEV1/forced vital capacity). Expression of miR-629-3p was localized in the bronchial epithelium, whereas miR-223-3p and miR-142-3p were expressed in neutrophils, monocytes, and macrophages. Transfecting human bronchial epithelial cells with miR-629-3p mimic induced epithelial IL-8 mRNA and protein expression. IL-1beta and IL-8 protein levels were significantly increased in sputum of patients with severe asthma and were positively associated with sputum neutrophilia. CONCLUSIONS: Expression of miR-223-3p, miR-142-3p, and miR-629-3p is increased in sputum of patients with severe asthma and is linked to neutrophilic airway inflammation, suggesting that these miRNAs contribute to this asthma inflammatory phenotype. [less ▲]

Detailed reference viewed: 25 (3 ULg)
Full Text
Peer Reviewed
See detailLe communauté du renseignement belge : essai de définition
Leroy, Patrick ULg

in Revue militaire Belge (2016), 12

De Belgische inlichtingengemeenschap beschikt niet over een contextuele definitie. Een maximale innoverende benadering van deze netwerkgemeenschap zal een toegevoegde waarde betekenen in dit tijdskader ... [more ▼]

De Belgische inlichtingengemeenschap beschikt niet over een contextuele definitie. Een maximale innoverende benadering van deze netwerkgemeenschap zal een toegevoegde waarde betekenen in dit tijdskader waarin het denken over veiligheid de overhand heeft. De inbreng van de inlichtingen op het ope- rationele niveau enerzijds en als een vorm van “moderne ken- nisindustrie” anderzijds zal ook een troef zijn in het bereiken van een veeleer heilbrengende identiteit. [less ▲]

Detailed reference viewed: 53 (2 ULg)
Full Text
Peer Reviewed
See detailVolumetric Absorptive Microsampling for Hepcidin Peptide Extraction from Whole Blood
Houbart, Virginie ULg; COBRAIVILLE, Gaël ULg; Nys, Gwenaël ULg et al

in LCGC North America (2016), 34(5),

Whole blood analysis is an emerging trend in the field of bioanalysis. We developed a fast and simple protocol to extract and analyze a peptide, hepcidin, from whole blood. Sampling and extraction were ... [more ▼]

Whole blood analysis is an emerging trend in the field of bioanalysis. We developed a fast and simple protocol to extract and analyze a peptide, hepcidin, from whole blood. Sampling and extraction were carried out using volumetric absorptive microsampling (VAMS), a novel blood collection method that allows the sampling of a known blood volume independently from hematocrit. The composition of the extraction medium was optimized using an experimental design to get the most intense signal of hepcidin, considering different organic solvents and acidic additives. [less ▲]

Detailed reference viewed: 57 (21 ULg)
Full Text
See detailJIMMY JOHNSON - Bluesman majeur en mode mineur
Sacré, Robert ULg

in ABS Magazine (2016), (50), 36-48

Dossier : interview et biographie ; avec photos

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailAddressing the risk of maladaptation to climate change
Magnan, Alexandre; Schipper, E.L.F.; Burkett, Maxine et al

in WIREs Clim Change (2016)

This paper reviews the current theoretical scholarship on maladaptation and provides some speci!c case studies—in the Maldives, Ethiopia, South Africa, and Bangladesh—to advance the !eld by offering an ... [more ▼]

This paper reviews the current theoretical scholarship on maladaptation and provides some speci!c case studies—in the Maldives, Ethiopia, South Africa, and Bangladesh—to advance the !eld by offering an improved conceptual understanding and more practice-oriented insights. It notably highlights four main dimensions to assess the risk of maladaptation, that is, process, multiple drivers, temporal scales, and spatial scales. It also describes three examples of frameworks— the Pathways, the Precautionary, and the Assessment frameworks—that can help capture the risk of maladaptation on the ground. Both these conceptual and practical developments support the need for putting the risk of maladaptation at the top of the planning agenda. The paper argues that starting with the intention to avoid mistakes and not lock-in detrimental effects of adaptation-labeled initiatives is a !rst, key step to the wider process of adapting to climate variability and change. It thus advocates for the anticipation of the risk of maladaptation to become a priority for decision makers and stakeholders at large, from the international to the local levels. Such an ex ante approach, however, supposes to get a clearer understanding of what maladaptation is. Ultimately, the paper af!rms that a challenge for future research consists in developing context-speci!c guidelines that will allow funding bodies to make the best decisions to support adaptation (i.e., by better capturing the risk of maladaptation) and practitioners to design adaptation initiatives with a low risk of maladaptation. [less ▲]

Detailed reference viewed: 29 (5 ULg)
Full Text
Peer Reviewed
See detailPhotoconductivity and photoconversion at a photorefractive thin crystal plate
Frejlich, Jaime; de Oliveira, Ivan; de Araujo, William R. et al

in Optical Materials (2016), 55

Detailed reference viewed: 20 (7 ULg)
Full Text
Peer Reviewed
See detailInsights into a million-year-scale Rhenohercynian carbonate platform evolution through a multi-disciplinary approach: example of a GIvetian carbonate record from Belgium
Pas, Damien ULg; Da Silva, Anne-Christine ULg; Devleeschouwer, Xavier et al

in Geological Magazine (2016)

In this paper we formulate answers to three important questions related to Givetian carbonate records and their use for reconstructing million-year past palaeoenvironmental changes. First, we provide ... [more ▼]

In this paper we formulate answers to three important questions related to Givetian carbonate records and their use for reconstructing million-year past palaeoenvironmental changes. First, we provide detailed illustrations of the fascinating diversity that shaped a significant shallow reefal platform during the early- to late-Givetian in the Rhenohercynian Ocean; secondly we improve the sedimentological model of the extensive Givetian carbonate platform in the Dinant Basin and thirdly we evaluate the application of magnetic susceptibility (MS) as a tool for long-term trend correlations and palaeoenvironmental reconstructions. These goals are reached by making sedimentological, geophysical and geochemical study of the La Thure section. Through the early-late Givetian interval we discerned eighteen microfacies ranging from a homoclinal ramp to a discontinuously rimmed shelf and then a drowning shelf. The comparison of these sedimentological results with those published in the south of the Dinant Syncline allowed us to provide an up to date model of the vertical and lateral environmental development for one of the largest Givetian carbonate platforms in Europe. This comparison also increased the knowledge on the facies belts distribution into the Dinant Basin and allowed us to highlight the Taghanic Event. Palaeo-redox proxies reveal a substantial change in the oxygenation level, from oxygen-depleted to more oxic condition, between middle and late Givetian. We demonstrated the relationship between variation in MS values and proxies for siliciclastic input (such as Si, Al). The La Thure is considered as a key section for the understanding of internal shelf settings bordering Laurussia’s south-eastern margin. [less ▲]

Detailed reference viewed: 71 (4 ULg)
Full Text
Peer Reviewed
See detailBlood eosinophil count to predict bronchial eosinophilic inflammation in COPD.
SCHLEICH, FLorence ULg; CORHAY, Jean-Louis ULg; LOUIS, Renaud ULg

in The European respiratory journal (2016), 47(5), 1562-4

No abstract available.

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailImpact of aphid alarm pheromone release on virus transmission efficiency: when pest control strategy could induce higher virus dispersion
Lin, Fang-Jing; Bosquée, Emilie ULg; Liu, Ying-Jie et al

in Journal of Virological Methods (2016)

Aphids cause serious damages to crops not only by tacking sap but also by transmitting numerous viruses. To develop biological control, the aphid alarm pheromone, namely E-β-farnesene (EβF), has been ... [more ▼]

Aphids cause serious damages to crops not only by tacking sap but also by transmitting numerous viruses. To develop biological control, the aphid alarm pheromone, namely E-β-farnesene (EβF), has been demonstrated to be efficient to repel aphids and as attract beneficials, making it a potential tool to control aphid pests. Considering aphids also as virus vectors, changes of their behaviour could also interfere with the virus acquisition and transmission process. Here, a combination of two aphid species and two potato virus models were selected to test the influence of EβF release on aphid and virus dispersion under laboratory conditions. EβF release was found to significantly decrease the population of M. persicae and M. euphorbiae around the infochemical releaser but simultaneously also increasing the dispersal of Potato Virus Y (PVY). At the opposite, no significant difference for Potato Leaf Roll Virus (PLRV) transmission efficiency was observed with similar aphid alarm pheromone releases for none of the aphid species. These results provide some support to carefully consider infochemical releasers not only for push – pull strategy and pest control but also to include viral disease in a the plant protection to aphids as they are also efficient virus vectors. Impact of aphid kinds and transmission mechanisms will be discussed according to the large variation found between persistent and non persistent potato viruses and interactions with aphids and related infochemicals. [less ▲]

Detailed reference viewed: 19 (5 ULg)
Full Text
Peer Reviewed
See detailScientist and non-scientists share a diversity of dimensions in their relations to urban nature
Prévot, Anne-Caroline; Servais, Véronique ULg; Piron, Armony

in Urban Ecosystems (2016)

In the current biodiversity crisis, conservation scientists are urgently asked to involve themselves in education and communication initiatives toward non-scientists, who are considered as lacking ... [more ▼]

In the current biodiversity crisis, conservation scientists are urgently asked to involve themselves in education and communication initiatives toward non-scientists, who are considered as lacking knowledge to correctly value biodiversity. This is particularly argued in urban areas. In this paper, we showed however with an anthropological survey that urban citizens do express a variety of relations toward surrounding urban nature. Then, in an independent survey, we showed that these ways of being connected with nature were shared by students in conservation sciences. Conservation scientists and non-scientific city dwellers have therefore much more in common than is taken for granted in their relations and perceptions of urban nature, notably concerning emotional, sensorial and memorial relationships. Acknowledging these common features in the scientific community could improve the communication between science and the general public about urban nature, help bridge the gap between science and the society and eventually participate to build a new social contract on nature. [less ▲]

Detailed reference viewed: 10 (1 ULg)