References of "2011"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailCompetitive facility location problem with attractiveness adjustment of the follower: A bilevel programming model and its solution
Kucukaydin, Hande ULg; Aras, Necati; Altinel, I. Kuban

in European Journal of Operational Research (2011), 208(3), 206-220

We are concerned with a problem in which a firm or franchise enters a market by locating new facilities where there are existing facilities belonging to a competitor. The firm aims at finding the location ... [more ▼]

We are concerned with a problem in which a firm or franchise enters a market by locating new facilities where there are existing facilities belonging to a competitor. The firm aims at finding the location and attractiveness of each facility to be opened so as to maximize its profit. The competitor, on the other hand, can react by adjusting the attractiveness of its existing facilities with the objective of maximizing its own profit. The demand is assumed to be aggregated at certain points in the plane and the facilities of the firm can be located at predetermined candidate sites. We employ Huff's gravity-based rule in modeling the behavior of the customers where the fraction of customers at a demand point that visit a certain facility is proportional to the facility attractiveness and inversely proportional to the distance between the facility site and demand point. We formulate a bilevel mixed-integer nonlinear programming model where the firm entering the market is the leader and the competitor is the follower. In order to find the optimal solution of this model, we convert it into an equivalent one-level mixed-integer nonlinear program so that it can be solved by global optimization methods. Apart from reporting computational results obtained on a set of randomly generated instances, we also compute the benefit the leader firm derives from anticipating the competitor's reaction of adjusting the attractiveness levels of its facilities. The results on the test instances indicate that the benefit is 58.33% on the average. [less ▲]

Detailed reference viewed: 51 (7 ULg)
Full Text
Peer Reviewed
See detailCoordination of verbal dependents in Old French : Coordination as a specified juxtaposition or apposition
Mazziotta, Nicolas ULg

in Gerdes, Kim; Hajičova, Eva; Wanner, Leo (Eds.) Proceedings of Depling 2011, International Conference on Dependency Linguistics, Barcelona (2011)

Detailed reference viewed: 17 (0 ULg)
Full Text
See detailOrganic farming in Wallonia : situation and perspectives
Burny, Philippe ULg

in Petrescu-Mag, Ruxandra-Malina; Petrescu, Dacinia Crina; Burny, Philippe (Eds.) Environmental issues in the context of sustainable development (2011)

The paper describes the recent evolution of organic farming in Wallonia. The share of organic farmers in the total number of farms in Wallonia now reaches 5%, which is also the proportion of organic ... [more ▼]

The paper describes the recent evolution of organic farming in Wallonia. The share of organic farmers in the total number of farms in Wallonia now reaches 5%, which is also the proportion of organic agricultural land in the total agricultural area. The financial support of public authorities, through direct payments or services like research, extension, advertisement, is essential for the maintenance or development of the Wallonian organic sector. This support is not granted for the future, but can be expected. [less ▲]

Detailed reference viewed: 31 (6 ULg)
Full Text
Peer Reviewed
See detail1D numerical modeling of the flow over a Piano Key Weir
Erpicum, Sébastien ULg; Machiels, Olivier ULg; Archambeau, Pierre ULg et al

in Erpicum, Sébastien; Laugier, Frédéric; Boillat, Jean Louis (Eds.) et al Labyrinth and Piano Key Weirs - PKW 2011 (2011)

Because of the PK-Weir geometric specificities, its hydraulic capacity remains difficult to predict without using experimental techniques. A 1D numerical model of the flow over a PK-Weir has been ... [more ▼]

Because of the PK-Weir geometric specificities, its hydraulic capacity remains difficult to predict without using experimental techniques. A 1D numerical model of the flow over a PK-Weir has been developed at the Research unit HACH at the University of Liege. It is based on a 1D modeling of the inlet and the outlet separately, with a single upstream reservoir and interactions between both flows by exchange of mass and momentum along the lateral crest. The comparison of the numerical results with various experimental data showed the ability of the numerical model to predict with reasonable accuracy the release capacity of a PK-Weir, whatever its geometry. The tests of the solver enable to highlight the significant influence of the inlet and outlet width on the weir release capacity. They also suggest that improvements of the numerical model may lie in the evaluation of the discharge coefficient of the lateral crest. [less ▲]

Detailed reference viewed: 128 (11 ULg)
Full Text
Peer Reviewed
See detailZinc complexes with 1,2,4-triazole functionalized amino acid derivatives: Synthesis, structure and b-lactamase assay
Naik, Anil; Beck, Joséphine; Dîrtu, Marinela et al

in Inorganica Chimica Acta (2011), 368

Coordinating abilities of 4R-1,2,4-triazole derivatives (R = glycine ethyl ester (L1), glycine (L2), diethylamino malonate (L3), methionine (L4) and diethyl aminomethylphosphonate (L5)) towards ZnII ions ... [more ▼]

Coordinating abilities of 4R-1,2,4-triazole derivatives (R = glycine ethyl ester (L1), glycine (L2), diethylamino malonate (L3), methionine (L4) and diethyl aminomethylphosphonate (L5)) towards ZnII ions have been studied in solution, in solid state and versus three zinc-b-lactamases. The crystal structure of [Zn3(L4)6(H2O)6] (6) is described; it is the first crystal structure involving a 1,2,4-triazole functionalized methionine. It forms a trinuclear complex with central zinc octahedrally coordinated by only L4, whereas terminal zinc ions coordination sphere is completed by three water molecules. L4 exhibits a dual functionality of a bridging bidentate ligand as well as an anion. A dense hydrogen bonding network connects these trinuclear entity into a 3D supramolecular network. The ZnII ions in 6 are held at equidistance (3.848 Å) which coincidently matches with the corresponding Zn Zn distance in the binuclear zinc enzyme from Bacillus cereus (3.848 and 4.365 Å). Among L1–L5 screened for b-lactamase assay, L4 shows modest inhibition for BcII enzyme. [less ▲]

Detailed reference viewed: 38 (1 ULg)
Full Text
See detailMiradas que se cruzan desde España. El entusiasmo de Manuel Vázquez Montalbán y la crítica de Ignacio Vidal-Folch
Vanden Berghe, Kristine ULg

in Vanden Berghe, Kristine; Huffshmid, Anne; Lefere, Robin (Eds.) EL EZLN y sus intérpretes. Resonancias del zapatismo en la academia y en la literatura. (2011)

Detailed reference viewed: 43 (3 ULg)
Full Text
Peer Reviewed
See detailManagement of multiple valve disease.
Unger, Philippe; Rosenhek, Raphael; Dedobbeleer, Chantal et al

in Heart (British Cardiac Society) (2011), 97(4), 272-7

Multivalvular heart disease is not an uncommon situation, but the paucity of data for each specific situation does not allow the proposal of a standardised, evidence-based management strategy. This paper ... [more ▼]

Multivalvular heart disease is not an uncommon situation, but the paucity of data for each specific situation does not allow the proposal of a standardised, evidence-based management strategy. This paper aims at reviewing the available evidence on the management of multivalvular disease, taking into account the interactions between different valve lesions, the diagnostic pitfalls and the strategies that should be considered in the presence of multiple valvular disease. [less ▲]

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailOptimal linear taxation under endogenous longevity
Pestieau, Pierre ULg; Leroux, ML; Ponthiere, Gregory

in Journal of Population Economics (2011), 24

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailAntibody production by injection of living cells expressing non self antigens as cell surface type II transmembrane fusion protein.
Nizet, Yannick; Gillet, Laurent ULg; SCHROEDER, Hélène ULg et al

in Journal of immunological methods (2011)

Antigen expression and purification are laborious, time consuming and frequently difficult steps in the process of antibody production. In the present study, we developed a method avoiding these two steps ... [more ▼]

Antigen expression and purification are laborious, time consuming and frequently difficult steps in the process of antibody production. In the present study, we developed a method avoiding these two steps. This method relies on the injection of histocompatible living cells stably expressing the antigen as a cell surface type II transmembrane fusion protein. A vector, nicknamed pCD1-CD134L, was constructed to express the antigen fused at the carboxyterminal end of the human CD134 ligand (CD134L) type II transmembrane protein on the surface of eucaryotic cells. This vector was shown to induce cell surface expression of epitopes from human c-Myc (soluble protein), uterogloblin-related protein 1 (secreted protein) and CD94 (type II transmembrane protein). Using this vector, we developed a method to produce antibodies without antigen production. The flowchart of this method is as follows: (i) cloning of the antigen in the pCD1-CD134L vector; (ii) production of a histocompatible cell line stably expressing the CD134L-antigen fusion protein; (iii) testing for cell surface expression of the fusion protein by targeting the CD134L carrier; and (iv) prime-boost immunisation with living cells expressing the fusion protein. This method was successfully used for production of polyclonal antibodies raised against Ixodes ricinus calreticulin (secreted protein) in mice and for production of monoclonal antibodies raised against an epitope of Vaccinia virus A56 (type I transmembrane protein) protein in rat. The present study is the first to demonstrate the use of a type II transmembrane protein as a carrier for cell surface display of antigens. [less ▲]

Detailed reference viewed: 56 (21 ULg)
Full Text
See detailChlamydomonas can play a role in the study of a heteroplasmic human mitochondrial mutation
Larosa, Véronique ULg; Coosemans, Nadine ULg; Bonnefoy, Nathalie et al

Scientific conference (2011)

Detailed reference viewed: 21 (3 ULg)
Full Text
Peer Reviewed
See detailIL28B polymorphism and the control of hepatitis C virus infection: ready for clinical use?
Orlent, Hans; Reynaert, Hendrik; Bourgeois, Stefan et al

in Acta Gastro-Enterologica Belgica (2011), 74(2), 317-322

Polymorphisms in the region of the interleukin-28B (IL28B) gene have recently been associated with spontaneous and treatment induced clearance of hepatitis C virus infection. The specific mechanisms of ... [more ▼]

Polymorphisms in the region of the interleukin-28B (IL28B) gene have recently been associated with spontaneous and treatment induced clearance of hepatitis C virus infection. The specific mechanisms of how IL28B polymorphisms affect HCV suppression remain unknown. It is a matter of ongoing debate how to incorporate the IL28B data into the current treatment algorithms with pegylated interferon-alpha and ribavirin. The eventual role of the IL28B genotype in new therapeutic regimes with direct antiviral agents needs to be explored in the ongoing and future clinical studies with these agents. [less ▲]

Detailed reference viewed: 34 (3 ULg)
Full Text
See detailSentiment d’altérité dans la correspondance de Rousseau en 1762
Biquet, Stéphanie ULg

in Turekova, Andrea (Ed.) Conférence internationale Autre - Autrui - Altérité (2011)

Jean-Jacques Rousseau est né avec la conscience de son altérité : fils d’horloger, citoyen de Genève, il se sent dès son plus jeune âge différent du monde qui l’entoure. Par sa « réforme » au début des ... [more ▼]

Jean-Jacques Rousseau est né avec la conscience de son altérité : fils d’horloger, citoyen de Genève, il se sent dès son plus jeune âge différent du monde qui l’entoure. Par sa « réforme » au début des années 1750, il transformera officiellement cette altérité en faire-valoir. Pourtant, quand résonne le glas de la condamnation de ses œuvres (Émile et le Contrat social) en 1762, l’homme jusque-là différent, se sent étranger, incompris, seul contre tous, comme en témoigne sa correspondance. Cet article se donne pour objectif d’étudier ce sentiment d’altérité et d’étrangeté à travers la correspondance personnelle de Jean-Jacques Rousseau de 1762 à 1765 (soit de la condamnation de l’Émile et du Contrat social jusqu'au départ pour l’Angleterre chez David Hume). [less ▲]

Detailed reference viewed: 64 (2 ULg)
Full Text
See detailProspects for harmonized biodiversity assessments using national forest inventory data
McRoberts, Ronald E.; Chirici, Gherardo; Winter, Susanne et al

in Chirici, Gherardo; Winter, Susanne; McRoberts, Ronald E. (Eds.) National Forest Inventories - contributions to Forest Biodiversity Assessments (2011)

After selection of the 13 biodiversity variables (Sect. 2.3) based on their importance and feasibility for assessment by NFIs, responses were solicited from participating countries regarding the degree to ... [more ▼]

After selection of the 13 biodiversity variables (Sect. 2.3) based on their importance and feasibility for assessment by NFIs, responses were solicited from participating countries regarding the degree to which the variables are now assessed. Two conclusions were evident: (1) most countries currently assess most of the variables, but (2) consensus is lacking on assessment methods and necessary field crew expertise, suggesting that harmonization would require emphasis on field operations. For each of the seven essential features into which the 13 variables were grouped, more detailed assessments were conducted. For forest categories, the conclusion was that the only major difference in classification systems used by European NFIs was whether potential or actual vegetation was used to define classes. Thus, the prospects for harmonization of forest categories are considered excellent. For forest structure, the prospects depend on the variable. For tree species, the prospects are excellent because the variable is assessed in the same manner by all NFIs. For dbh and height, considerable variability in measurementthresholds were found, but otherwise the harmonization prospects are good. For social position, definitions of classes varied, but harmonized estimates of proportions for dominant, intermediate, and suppressed classes are considered possible. Prospects for harmonized estimates of layers are consideraly poorer because of different definitions, thresholds and the uncertainty associated with visual assessment methods. Harmonized estimation of forest age is impeded by the increasing proportion of uneven-aged stands for which age is often not assessed, different definitions, and different assessment methods. However, agreement on dominant age as a reference definition would greatly increase the prospects. Deadwood is becoming an increasingly popular indicator of sustainable forest management. Unfortunately, considerable variability was found in deadwood definitions, components (e.g., stumps, limbs), sampling methods, and measurement thresholds. Thus, harmonized deadwood estimation will require development of bridges. Harmonization of regeneration estimates faces challenges due to differences in assessment approaches such as presence/absence versus coverage and all species versus dominant species. Harmonized estimation may be restricte to change in regeneration success. Harmonized estimation for ground vegetation also faces serious challenges due to differences in the components assessed (e.g., small trees, shrubs, herbs, bryophytes, lichens), difference in height thresholds, and differences in categories for which ground vegetation is reported. Forest naturalness integrates many of the other essential feature. However, many countries do not assess naturalness, and among those that do, assessment variables, methods, and reporting classes vary considerably. For harmonized assessment using NFI variables, the hemeroby approach, which emphasizes indications of human influence, is extremely sensitive to plot size. Harmonization using the ecosystem processes approach requires a common dbh threshold and similar plot sizes. The overall conclusion is that harmonization will be considerably easier for some essential features than for others. The factors leading to difficulties often are related to different definitions, different reporting classes, different measurement thresholds, and different features of sampling protocols such as plot sizes and configurations. Nevertheless, construction of reference definitions and bridges greatly facilitate harmonization for all essential features as is illustrated in Chap. 5. [less ▲]

Detailed reference viewed: 105 (11 ULg)
Full Text
See detailLe modèle de croissance katangais face à la crise financière mondiale : enjeux en termes d'emploi
Lapeyre, Frédéric; Lebailly, Philippe ULg; Musewa M'Bayo, Laki et al

Book published by Bureau International du Travail (2011)

La crise financière mondiale qui a éclaté en 2008 et les effets désastreux qu’elle a occasionnés sur le secteur minier en RDC (qui avait été placé au centre des politiques de croissance et de lutte contre ... [more ▼]

La crise financière mondiale qui a éclaté en 2008 et les effets désastreux qu’elle a occasionnés sur le secteur minier en RDC (qui avait été placé au centre des politiques de croissance et de lutte contre la pauvreté) posent avec encore plus d’acuité la question de la diversification de la structure économique dans une province comme le Katanga. Au problème de la vulnérabilité d’un tel modèle de croissance s’ajoute le constat qui est fait dans cette étude du manque d’effet d’entrainement de l’activité des grands groupes miniers sur le reste de l’économie locale, en termes de développement des capacités productives et de création d’emplois. [less ▲]

Detailed reference viewed: 65 (20 ULg)
See detailA l’épreuve du pluralisme : conceptions du monde, conflits d’interprétations et mondes sociaux. Le commun, le différend et le compromis
Nachi, Mohamed ULg

in Nachi, Mohamed (Ed.) Actualité du compromis. La construction politique de la différence (2011)

Detailed reference viewed: 28 (0 ULg)
Full Text
Peer Reviewed
See detailSpecific and extensive endometrial deregulation is present before conception in IVF/ICSI repeated implantation failures (IF) or recurrent miscarriages.
Lédée, Nathalie; Munaut, Carine ULg; Aubert, Julie et al

in Journal of Pathology (The) (2011), 225(4), 554-64

The objective was to examine if IVF/ICSI repeated implantation failures (IF) or recurrent miscarriages (RM) could be related to preconceptional endometrial deregulations. IF was defined as the absence of ... [more ▼]

The objective was to examine if IVF/ICSI repeated implantation failures (IF) or recurrent miscarriages (RM) could be related to preconceptional endometrial deregulations. IF was defined as the absence of pregnancy despite the transfer of at least ten IVF/ICSI good quality embryos, and RM as having at least three unexplained miscarriages. Fertile controls (FC) were women who had given birth at least once. Endometrial biopsy was performed in the mild luteal phase of a non-conceptual cycle (five women were selected in each group). Affymetrix chips (GeneChip Human Genome U133 Plus2.0 Array) were used for hybridization. Data were normalized by the gcRMA method, and raw p values adjusted by the Bonferroni procedure (1%). Differential expression of selected genes was analysed using real-time PCR. Gene networks and biological functions were explored using the Ingenuity Pathways Analysis software. Endometrial gene expression profiles at the time of uterine receptivity differ dramatically in the endometrium among FC, RM, and IF patients. Compared to FC, 2126 and 2477 genes are differentially expressed in IF and RM groups, respectively, and 2363 between IF and RM. In both conditions, differential gene expression referred mainly to DNA transcription and expression. Other main cellular functions deregulated in IF conditions correspond to cell morphology, cellular development, cell cycle, and cellular assembly, while in RM conditions, deregulated cellular functions relate to cell signalling (degradation of cyclic AMP and calcium metabolism) and cellular maintenance. In both conditions, there is an over-representation of deregulations related to the haematological system. In the IF condition, cell-mediated immune response and nervous system development and function are highly deregulated, while in RM patients, main deregulations are in organ and tissue development, humoral immune response, and muscular system development and function. Extensive endometrial deregulations are present before conception in patients who experienced IF or RM with both distinct and common deregulation. [less ▲]

Detailed reference viewed: 37 (3 ULg)
Full Text
Peer Reviewed
See detailQuestionnement agroécologique: les systèmes participatifs de garantie comme critique de la certification et nouveau mode de gouvernance?
Stassart, Pierre M ULg; Brandenburg, Alfio; Isaguirre, Katya

in SFER Online http://www.sfer.asso.fr/les_colloques2/les_transversalites_de_l_agriculture_biologique/programme_actes_du_colloque (2011)

Ce papier propose un questionnement agroécologique sur la transition agroécologique comme un processus de réflexivité de second ordre. Nous construisons cette hypothèse en prenant le cas de l’émergence ... [more ▼]

Ce papier propose un questionnement agroécologique sur la transition agroécologique comme un processus de réflexivité de second ordre. Nous construisons cette hypothèse en prenant le cas de l’émergence des Systèmes Participatif de Garantie (SPG) au Brésil comme une critique de la certification déléguée à une tierce partie et une proposition alternative de gouvernance face au contrôle de conformité marchand. Nous prenons en particulier le cas d’Ecovida et de sa certification participative qui est à l’origine des SPG brésiliennes. Le statut de notre communication est prospectif : après avoir précisé ce que nous entendons par réflexivité, nous posons une série de questions qui portent à la fois sur l’apprentissage et la réflexivité de cette expérience#!Cette mise à l’épreuve nous intéresse dans la mesure où elle peut nous informer sur ce que peuvent devenir des modes de gouvernance réflexifs dans le monde de la bio. [less ▲]

Detailed reference viewed: 88 (3 ULg)
Full Text
Peer Reviewed
See detailPhysico-chemical and morphological properties of current particulated biomaterials used in alveolar bone augmentations: a review.
LAMBERT, France ULg; Layrolle, Pierre; ROMPEN, Eric ULg et al

in Journal of Osteology and Biomaterials (2011), 2

The efficacy of grafting materials for alveolar bone regeneration procedures has been repeatedly corroborated by clinical and scientific evidence. Although an ever growing number of biomaterials are ... [more ▼]

The efficacy of grafting materials for alveolar bone regeneration procedures has been repeatedly corroborated by clinical and scientific evidence. Although an ever growing number of biomaterials are available on the market, the origins, material characteristics, bioactivity and osteoconductive properties of these products are not always known by clinicians, hence often hampering an adequate product selection. The purpose of this contribution was to provide an overview of five different types of osteoconductive grafting materials frequently used in dentistry (Bio-Oss®, Cerasorb M™, Bone Ceramic®, Natix®, Genos®) and to summarize their physico-chemical and morphological characteristics at the macro- and micro-scale. Furthermore, the influence of these properties on the in vivo behaviour of these biomaterials is discussed. The results of this study are presented as data sheets, which may prove helpful for clinicians in the design of their treatment strategies. [less ▲]

Detailed reference viewed: 34 (14 ULg)