References of "2012"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailA leader-follower game in competitive facility location
Kucukaydin, Hande ULg; Aras, Necati; Altinel, I. Kuban

in Computers & Operations Research (2012), 39(2), 437-448

We address the problem of locating new facilities of a firm or franchise that enters a market where a competitor operates existing facilities. The goal of the new entrant firm is to decide the location ... [more ▼]

We address the problem of locating new facilities of a firm or franchise that enters a market where a competitor operates existing facilities. The goal of the new entrant firm is to decide the location and attractiveness of its new facilities that maximize its profit. The competitor can react by opening new facilities, closing existing ones, and adjusting the attractiveness levels of its existing facilities, with the aim of maximizing its own profit. The demand is assumed to be aggregated at certain points in the plane and the new facilities of both the firm and the competitor can be located at predetermined candidate sites. We employ the gravity-based rule in modeling the behavior of the customers where the probability that a customer visits 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. We propose heuristics that combine tabu search with exact solution methods. [less ▲]

Detailed reference viewed: 20 (2 ULg)
Full Text
Peer Reviewed
See detailA method for evaluating transport energy consumption in suburban areas
Marique, Anne-Françoise ULg; Reiter, Sigrid ULg

in Environmental Impact Assessment Review (2012), 33

Urban sprawl is a major issue for sustainable development. It represents a significant contribution to energy consumption of a territory especially due to transportation requirements. However, transport ... [more ▼]

Urban sprawl is a major issue for sustainable development. It represents a significant contribution to energy consumption of a territory especially due to transportation requirements. However, transport energy consumption is rarely taken into account when the sustainability of suburban structures is studied. In this context, the paper presents a method to estimate transport energy consumption in residential suburban areas. The study aimed, on this basis, at highlighting the most efficient strategies needed to promote awareness and to give practical hints on how to reduce transport energy consumption linked to urban sprawl in existing and future suburban neighborhoods. The method uses data collected by using empirical surveys and GIS. An application of this method is presented concerning the comparison of four suburban districts located in Belgium to demonstrate the advantages of the approach. The influence of several parameters, such as distance to work places and services, use of public transport and performance of the vehicles, are then discussed to allow a range of different development situations to be explored. The results of the case studies highlight that travelled distances, and thus a good mix between activities at the living area scale, are of primordial importance for the energy performance, whereas means of transport used is only of little impact. Improving the performance of the vehicles and favoring home-work give also significant energy savings. The method can be used when planning new areas or retrofitting existing ones, as well as promoting more sustainable life styles regarding transport habits. [less ▲]

Detailed reference viewed: 331 (58 ULg)
Full Text
Peer Reviewed
See detailEstimation of human orientation based on silhouettes and machine learning principles
Pierard, Sébastien ULg; Van Droogenbroeck, Marc ULg

in International conference on pattern recognition applications and methods (ICPRAM) (2012, February)

Estimating the orientation of the observed person is a crucial task for home entertainment, man-machine interaction, intelligent vehicles, etc. This is possible but complex with a single camera because it ... [more ▼]

Estimating the orientation of the observed person is a crucial task for home entertainment, man-machine interaction, intelligent vehicles, etc. This is possible but complex with a single camera because it only provides one side view. To decrease the sensitivity to color and texture, we use the silhouette to infer the orientation. Under these conditions, we show that the only intrinsic limitation is to confuse the orientation q with the supplementary angle (that is 180°-theta), and that the shape descriptor must distinguish between mirrored images. In this paper, the orientation estimation is expressed and solved in the terms of a regression problem and supervised learning. In our experiments, we have tested and compared 18 shape descriptors; the best one achieves a mean error of 5:24°. However, because of the intrinsic limitation mentioned above, the range of orientations is limited to 180°. Our method is easy to implement and outperforms existing techniques. [less ▲]

Detailed reference viewed: 169 (19 ULg)
See detailContract 21539/08/NL/SFe - Advancement of mechanical verification methods for non-linear spacecraft: Modal analysis using nonlinear normal modes.
Renson, Ludovic ULg; Noël, Jean-Philippe ULg; Kerschen, Gaëtan ULg

Report (2012)

The objective of this technical note is to explore the applicability of nonlinear modal analysis to spacecraft structures. To this end, algorithms for the continuation of periodic solutions are applied to ... [more ▼]

The objective of this technical note is to explore the applicability of nonlinear modal analysis to spacecraft structures. To this end, algorithms for the continuation of periodic solutions are applied to the finite element model of the SmallSat spacecraft. Nonlinear normal modes and their corresponding frequencies of oscillation are computed, and the results are discussed. [less ▲]

Detailed reference viewed: 35 (3 ULg)
Full Text
Peer Reviewed
See detailGenetic and functional evidence for a role of CYLD in Crohn’s Disease: results from a European consortium
Cleynen, I; Vazeille, E; Artieda, M et al

in Journal of Crohn’s and Colitis [=JCC] (2012)

Detailed reference viewed: 18 (5 ULg)
Full Text
Peer Reviewed
See detailA Single Ancient Origin for Prototypical Serine/Arginine-Rich Splicing Factors1[W][OA]
Califice, Sophie; Baurain, Denis ULg; Hanikenne, Marc ULg et al

in Plant Physiology (2012), 158(2), 546-560

Eukaryotic pre-mRNA splicing is a process involving a very complex RNA-protein edifice. Serine/arginine-rich (SR) proteins play essential roles in pre-mRNA constitutive and alternative splicing, and have ... [more ▼]

Eukaryotic pre-mRNA splicing is a process involving a very complex RNA-protein edifice. Serine/arginine-rich (SR) proteins play essential roles in pre-mRNA constitutive and alternative splicing, and have been suggested to be crucial in plant-specific forms of developmental regulation and environmental adaptation. Despite their functional importance, little is known about their origin and evolutionary history. SR splicing factors have a modular organization featuring at least one RRM domain and a C-terminal region enriched in Ser/Arg dipeptides. To investigate the evolution of SR proteins, we infer phylogenies for >12,000 RRM domains representing >200 broadly sampled organisms. Our analyses reveal that the RRM domain is not restricted to eukaryotes and that all prototypical SR proteins share a single ancient origin, including the plant-specific SR45 protein. Based on these findings, we propose a scenario for their diversification into four natural families, each corresponding to a main SR architecture, and a dozen subfamilies, of which we profile both sequence conservation and composition. Finally, using operational criteria for computational discovery and classification, we catalogue SR proteins in 20 model organisms, with a focus on green algae and land plants. Altogether, our study confirms the homogeneity and antiquity of SR splicing factors, while establishing robust phylogenetic relationships between animal and plant proteins, which should enable functional analyses of lesser characterized SR family members, especially in green plants. [less ▲]

Detailed reference viewed: 101 (40 ULg)
Full Text
See detailDéveloppement d'un prototype exploitant les brevets ViBe et le chiffrement d'images
Schadeck, Damien ULg; Van Droogenbroeck, Marc ULg

Report (2012)

This report develops many software enhancements proposed to speed up ViBe, a patented technology designed to detect backgrounds and motion in video sequences. It also elaborates on a technology for the ... [more ▼]

This report develops many software enhancements proposed to speed up ViBe, a patented technology designed to detect backgrounds and motion in video sequences. It also elaborates on a technology for the partial encryption of images. [less ▲]

Detailed reference viewed: 55 (12 ULg)
Full Text
See detailLe ciel pour tous
Nazé, Yaël ULg

Article for general public (2012)

Detailed reference viewed: 28 (5 ULg)
Full Text
See detailWhat have the last outbreaks of atypical myopathy in Europe told us: new epidemiological evidence.
Votion, Dominique ULg

in Verwilghen, Denis; Van Galen, Gaby; Busoni, Valeria (Eds.) Belgian International Congress: Hippos 2012 (2012, February)

Atypical myopathy outbreaks are of an acute and unexpected nature and the information given in this review aims at helping equine practitioners in the recognition and handling of a suspected case in the ... [more ▼]

Atypical myopathy outbreaks are of an acute and unexpected nature and the information given in this review aims at helping equine practitioners in the recognition and handling of a suspected case in the event of AM outbreaks. So, this review (1) describes the diagnostic tools for AM, (2) reports prognostic criteria, and (3) lists preventive measures based on recent epidemiological surveys. [less ▲]

Detailed reference viewed: 67 (7 ULg)
Full Text
Peer Reviewed
See detailBénéfices démontrés et potentiels de l'administration intraveineuse périopératoire de lidocaïne
Giudice, Véronica; LAUWICK, Séverine ULg; KABA, Abdourahmane ULg et al

in Revue Médicale de Liège (2012), 67(2), 81-84

Detailed reference viewed: 41 (6 ULg)
See detailContract 21539/08/NL/SFe - Advancement of mechanical verification methods for non-linear spacecraft: Nonlinear identification using a subspace-based method in the frequency domain
Noël, Jean-Philippe ULg; Renson, Ludovic ULg; Kerschen, Gaëtan ULg

Report (2012)

The objective of this technical note is to explore the applicability of a newly introduced nonlinear system identification technique to spacecraft structures. To this end, numerical experiments are ... [more ▼]

The objective of this technical note is to explore the applicability of a newly introduced nonlinear system identification technique to spacecraft structures. To this end, numerical experiments are conducted using a finite element model of the SmallSat spacecraft. A detailed introduction to the method, referred to as the frequency-domain nonlinear subspace identification (FNSI) method, is provided and its major assets are commented. Random-type and sine-sweep excitations are considered and identification results are extensively discussed. [less ▲]

Detailed reference viewed: 37 (2 ULg)
Full Text
See detailLivre Blanc Céréales - Gembloux
Destain, Jean-Pierre ULg; Bodson, Bernard ULg

Book published by Gembloux Agro-Bio Tech - Edition février 2012 (2012)

Detailed reference viewed: 25 (5 ULg)
Full Text
See detailStructuration de la diversité génétique du genre Milicia: taxonomie, phylogéographie, dynamique des populations
Daïnou, Kasso ULg

Doctoral thesis (2012)

Characterizing population genetic structure using phylogeographic approach contributes to understanding of evolutionary processes that affect plant populations. The present study investigated how past ... [more ▼]

Characterizing population genetic structure using phylogeographic approach contributes to understanding of evolutionary processes that affect plant populations. The present study investigated how past environmental variations can shape the spatial genetic diversity of an African timber tree species, Milicia excelsa (Welw) C.C. Berg. Given that plant responses to disturbances are closely linked to life history traits, this research also aimed to describe relationships between the reproductive traits of M. excelsa and its population genetic structure. Phylogeographic analyses were performed throughout the range of M. excelsa using nuclear and chloroplastic markers. Ecological characterization was conducted for a single population located in south-East Cameroon. Since M. excelsa is similar to the other species of its genus, M. regia (A. Chev) C.C. Berg, we first performed a morphogenetic comparison of these two taxa. The results confirmed an important morphological similarity between the two species with very rare discriminating criteria. In fact Bayesian assignment methods and reproductive isolation patterns suggest the occurrence of interspecific hybridization, which appeared to be unidirectional: hybrids displayed the M. regia morphotype. Because M. regia is known to be more adapted to humid tropical forests, one may expect it to occur in the Congo basin zone. However, its range is restricted to the western part of West Africa while M. excelsa occurs from Guinea-Conakry to Zimbabwe. Interestingly, in the case of M. excelsa, Central and West African specimens had no shared haplotype. This result was unexpected because long gene dispersal distances were found in Cameroonian populations, as expected from the behaviours of the main dispersal animals we identified, the bat Eidolon helvum and the parrots Psittacus erithacus and Agapornis swindernianus. In general, despite the likelihood for long distance seed dispersal, distinct genetic clusters were identified over West and Central Africa and their location may support the forest refugia hypothesis. In addition a phylogeographical signal was detected in chloroplast DNA indicating a prolonged separation between West and Central Africa populations with an accumulation of new mutations. At a smaller spatial scale, patterns of genetic structure also seemed to be weakly influenced by divergent reproduction times among sympatric individuals. The level of genetic diversity in the study populations falls within the range of values calculated for other tropical tree species. If phylogeography helps to infer population history, it also requires ecological or biological information to confirm some uncertainties. Such detailed data were often lacking to completely interpret numerous of our results. The present study raised new questions and led to new perspectives for further investigation both in phylogeography and botany. [less ▲]

Detailed reference viewed: 154 (36 ULg)
Full Text
Peer Reviewed
See detailA dynamic analysis of higher-comoment risk premiums in Hedge Fund returns
Lambert, Marie ULg

in Journal of Derivatives and Hedge Funds (2012), 18(1), 73-84

Hedge funds display a strong non-linear payoff structure because of the use of highly dynamic trading strategies. This article examines the relevance of using higherorder comoment equity risk premiums ... [more ▼]

Hedge funds display a strong non-linear payoff structure because of the use of highly dynamic trading strategies. This article examines the relevance of using higherorder comoment equity risk premiums implied in the United States and the emerging markets for capturing these return non-linearities. We provide evidence that the higherorder comoment equity risk premiums help in explaining the returns of the different hedge fund strategies from the Hedge Fund Research classification. We perform a dynamic analysis where moment risk exposures are examined separately in up and down markets. We show that hedge fund styles tend to vary their exposures to moment risks according to the market regimes. [less ▲]

Detailed reference viewed: 40 (7 ULg)
Full Text
See detailPropositions pour une politique de soutien des indépendants en difficulté
Van Caillie, Didier ULg; Lambrecht, Johan

Book published by Fondation Roi Baudouin - 1ère édition (2012)

This study discusses seven proposals allowing to increase the efficiency of administrative and legal measures taken by Belgian Public Authorities to prevent and to tackle with the difficulties encountered ... [more ▼]

This study discusses seven proposals allowing to increase the efficiency of administrative and legal measures taken by Belgian Public Authorities to prevent and to tackle with the difficulties encountered by entrepreneurs confrontated to the first steps of a business decline. [less ▲]

Detailed reference viewed: 46 (4 ULg)
Full Text
See detailWhat have the last outbreaks of atypical myopathy in Europe told us: new treatment plans
Van Galen, Gaby ULg; Votion, Dominique ULg

in Verwilghen, Denis; Van Galen, Gaby; Busoni, Valeria (Eds.) Belgian International Congress: Hippos 2012 (2012, February)

Management and treatment of atypical myopathy cases

Detailed reference viewed: 122 (20 ULg)
Full Text
Peer Reviewed
See detailHet janushoofd van Julia (1885)
Steyaert, Kris ULg

in Nederlandse Letterkunde (2012), 17(1), 10-31

In 1884 Willem Kloos and Albert Verwey started work on Julia, a collection of forty poems written in the manner of the successful author Fiore della Neve (M.G.L. van Loghem). In their pamphlet The ... [more ▼]

In 1884 Willem Kloos and Albert Verwey started work on Julia, a collection of forty poems written in the manner of the successful author Fiore della Neve (M.G.L. van Loghem). In their pamphlet The Incompetence of the Dutch Literary Critics (1886), in which Julia’s true authorship was revealed, Kloos and Verwey made plain that the poems had been conceived as deliberate nonsense, something the Dutch literary establishment had failed to recognize. Nevertheless, a close reading of the collection brings to light a number of textual similarities with Kloos’s and Verwey’s serious poetry written in the period 1883-1885. This article reveals Julia as a fascinating hybrid in which an older aesthetic coexists with a new poetical language associated with the Eighties Movement. [less ▲]

Detailed reference viewed: 32 (3 ULg)
Full Text
See detailInvestigations sur les protéines placentaires extraites des cotylédons fœtaux du Cervus elaphus
Fondja, E.; Okuyama, M.; Petrova, A. et al

Poster (2012, February)

Detailed reference viewed: 18 (2 ULg)