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Peer Reviewed
See detailReconstitution of the Journeys to Crime and Location of Their Origin in the Context of a Crime Series. A Raster Solution for a Real Case Study
Kasprzyk, Jean-Paul ULg; Trotta, Marie ULg; Donnay, Jean-Paul ULg et al

in Leitner, Michael (Ed.) Crime Modeling and Mapping Using Geospatial Technologies (2012)

In the region of Charleroi (Belgium), a series of criminal acts were committed by the same group, using the same vehicle. The events were located in space and time. The car used during these criminal ... [more ▼]

In the region of Charleroi (Belgium), a series of criminal acts were committed by the same group, using the same vehicle. The events were located in space and time. The car used during these criminal activities was stolen (first event) and was later retrieved (last event) after a period of 4 days of offences. Police recorded a crucial clue: the total mileage covered by the vehicle between the first and the last event was estimated with an admissible approximation. Thanks to this information, we were able to choose the most probable journey-to-crime among several scenarios. These depended on the combination of cost surfaces built with distance propagation algorithms starting from each criminal event in raster mode. The distance propagations were limited to the road network and the combinations of the cost surfaces had to respect the chronology of the facts. The most plausible scenario suggested that the criminals hided the car into a withdrawal site between their activities. In order to improve the precision of the location of this withdrawal site, we used a multi-criteria analysis taking account of the journey of the vehicle and other environment variables. At the end of these treatments, the small stretch of road that we isolated actually included the withdrawal site, as confirmed by the police later [less ▲]

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See detailReconstitution of the journeys to crime and location of their origin in the context of a crime series. A solution for a real case study.
Trotta, Marie ULg; Kasprzyk, Jean-Paul ULg; Donnay, Jean-Paul ULg

Conference (2010, April 15)

Dynamic studies in crime analysis usually use distance-decay models applied on isotropic surfaces. If the distance actually traveled within the context of a crime series can be estimated, another approach ... [more ▼]

Dynamic studies in crime analysis usually use distance-decay models applied on isotropic surfaces. If the distance actually traveled within the context of a crime series can be estimated, another approach, independent of the widely discussed form of the distance decay, can be suggested. Besides, there is a need for studies on anisotropic space, especially in European cities, given their complex road network. Therefore, this study takes this aspect into account. We use data of a real case provided by the Belgian Police Department. Five criminal events have been committed in a short period of time by individuals using the same stolen car before abandoning it. The milometer allowed the Police to estimate the mileage covered by the criminals. The purpose of the analysis is to map out all the possible journeys to crime in order to find the offender's hideout. First, we generate cost surfaces propagated from the locations of the criminal events over the dense road network in a high-resolution raster file. This provides a distance value for all pixels of the potential paths to each crime. Then these distances are cumulated for all criminal events and the sum is confronted to the recorded mileage. This gives a restricted list of road sections from which all event locations can be reached under the constraint of the mileage covered. These results are then refined through a multi-criteria analysis using exogenous data, such as land covers. The small area finally identified contains indeed the hideout as confirmed by the Police Department. [less ▲]

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See detailReconstitution of yeast nucelotide excision repair with purified RAD proteins, replication protein A and transcription factor TFIIH
Guzder, Sami; Habraken, Yvette ULg; Sung, Patrick et al

in Journal of Biological Chemistry (1995), 270(22), 12973-6

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See detailReconstructed interfollicular feline epidermis as a model for Microsporum canis dermatophytosis
Tabart, Jérémy; Baldo, Aline ULg; Vermout, Sandy et al

in Journal of Medical Microbiology (2007), 56(7), 971-975

Microsporum canis is a pathogenic fungus that causes a superficial cutaneous infection called dermatophytosis. The complexity of mechanisms involved in dermatophytic infections makes relevant in vivo ... [more ▼]

Microsporum canis is a pathogenic fungus that causes a superficial cutaneous infection called dermatophytosis. The complexity of mechanisms involved in dermatophytic infections makes relevant in vivo studies particularly difficult to perform. The aim of this study was to develop a new in vitro model of M. canis dermatophytosis using feline fetal keratinocytes in reconstructed interfollicular epidermis, and to investigate its relevance in studying the host-pathogen relationship. Histological analysis of reconstructed interfollicular feline epidermis (RFE) revealed a fully differentiated epidermis. A proliferation assay showed replicating cells only in the basal layer, indicating that RFE is a well-stratified living tissue, leading to the formation of a horny layer. Histopathological analysis of RFE infected by M. canis arthroconidia revealed that the fungus invades the stratum corneum and produces SUB3, a keratinase implicated in the infectious process. In view of these results, an M. canis dermatophytosis model on RFE seems to be a useful tool to investigate mechanisms involved in natural M. canis feline infections. [less ▲]

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See detailReconstructed interfollicular feline epidermis as a model for the screening of antifungal drugs against Microsporum canis.
Tabart, Jeremy; Baldo, Aline ULg; Vermout, Sandy et al

in Veterinary Dermatology (2008), 19(3), 130-133

A fully differentiated reconstructed interfollicular feline epidermis (RFE) was recently developed in vitro. It was shown to be relevant for the study of Microsporum canis-epidermal interactions. In this ... [more ▼]

A fully differentiated reconstructed interfollicular feline epidermis (RFE) was recently developed in vitro. It was shown to be relevant for the study of Microsporum canis-epidermal interactions. In this study, RFE was evaluated as a potential model for the in vitro screening of drugs against M. canis. As a preliminary step, the minimum inhibitory concentration of miconazole nitrate against M. canis IHEM 21239 grown on Sabouraud's dextrose agar was determined to be 0.3 microg mL(-1). RFE grown at the air-liquid interface was cultured for 24 h in RFE culture medium, supplemented with either miconazole (range 0.1-1 microg mL(-1)) or its solvent (dimethylsulfoxide). Then, RFE was inoculated in triplicate with 1 x 10(5 )M. canis arthroconidia and incubated for five additional days. To evaluate fungal growth, RFE was processed for routine histopathology, three serial sections being performed across the block at 100 microm intervals. No fungal growth was detected invading or on the surface of infected RFE in the presence of miconazole concentrations equal to or higher than 0.3 microg mL (final concentration in the culture medium). This study demonstrates that RFE is an adequate model for the in vitro screening of drugs against M. canis and potentially against other skin pathogens. [less ▲]

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See detailReconstructed interfollicular feline epidermis as a model for the screening of drugs against Microsporum canis
Mignon, Bernard ULg; Tabart, J.; Baldo, Aline ULg et al

in Veterinary Dermatology (2007), 18

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See detailReconstructing and Tracking Network State from a Limited Number of Synchrophasor Measurements
Glavic, Mevludin; Van Cutsem, Thierry ULg

in IEEE Transactions on Power Systems (2013), 28

A method is proposed to reconstruct and track network state from a limited number of Phasor Measurement Unit (PMU) data. To deal with the resulting unobservability, the state with bus powers and generator ... [more ▼]

A method is proposed to reconstruct and track network state from a limited number of Phasor Measurement Unit (PMU) data. To deal with the resulting unobservability, the state with bus powers and generator voltages closest to previously estimated values is computed. Those values, treated as pseudomeasurements, are obtained from the last reconstructed state, in a recursive manner. The method involves solving an optimization problem with linear constraints. It is scalable insofar as it accommodates from a few PMUs up to configurations ensuring full network observability. Reconstruction of only a region is possible. These and other features are demonstrated on the Nordic32 test system, with synchronized phasors obtained from detailed time simulation of a situation evolving towards instability. Suitable choices of PMU location and pseudo-measurements are also discussed. [less ▲]

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See detailReconstructing atoll-like mounds from the Frasnian of Belgium
Boulvain, Frédéric ULg; Cornet, Pierre ULg; Da Silva, Anne-Christine ULg et al

in Facies (2004), 50(2), 313-326

A succession of Frasnian mounds on the southern border of the Dinant Synclinorium (Belgium) was investigated for their facies architecture, sedimentary dynamics and palaeogeographic evolution. Seven mound ... [more ▼]

A succession of Frasnian mounds on the southern border of the Dinant Synclinorium (Belgium) was investigated for their facies architecture, sedimentary dynamics and palaeogeographic evolution. Seven mound facies were defined from the Arche (A) and Lion (L) members, each characterized by a specific range of textures and association of organisms (A2/L2: red or pink limestone with stromatactis, corals and crinoids; A3/L3: grey, pink or green limestone with stromatactis, corals and stromatoporoids; A4/L4: grey limestone with corals, peloids and dasycladaceens; A5/L5: grey microbial limestone; A6/L6: grey limestone with dendroid stromatoporoids, A7/L7: grey laminated limestone with fenestrae; and A8/L8: grey bioturbated limestone). Laterally equivalent sediments include substantial reworked material from the buildups and background sedimentation. Textures and fossils suggest that A2/L2 and A3/L3 facies developed close to storm wave base, in a subphotic environment. Facies A4/L4, occurring near fair weather wave base in the euphotic zone, includes lenses of A5/L5 with stromatolitic coatings and thrombolithes. A6/L6 corresponds to a slightly restricted environment and shows a progressive transition to fenestral limestone of A7/L7. This facies was deposited in a moderately restricted intertidal area. A8/L8 developed in a quiet lagoonal subtidal environment. The mounds started with A2/L2 or A3/L3 in which microbial lenses and algal facies A4/L4 became progressively more abundant upwards. Following 20 in of laterally undifferentiated facies, more restricted facies occur in the central part of the buildups. This geometry suggests the initiation of restricted sedimentation, sheltered by bindstone or floatstone facies. The facies interpretation shows that after construction of the lower part of the mounds during a transgression and a sea-level highstand, a lowstand forced reef growth to the margin of the buildups, initiating the development of atoll-like crowns during the subsequent transgressive stage. The persistence of restricted facies results from the balance between sea-level rise and reef growth. [less ▲]

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See detailReconstructing atolls from the Frasnian of Belgium
Boulvain, Frédéric ULg; Cornet, Pierre; Da Silva, Anne-Christine ULg et al

Conference (2003, September)

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See detailReconstructing export production at the NE Atlantic Margin: potential and limits of the Ba proxy
Fagel, Nathalie ULg; Dehairs, Frank; Peinert, Ralf et al

in Marine Geology (2004), 204(1-2), 11-25

Barium (Ba), aluminium (Al), and zirconium (Zr) were measured in sediment trap material deployed at two margin settings of the NE Atlantic: the Bay of Biscaye at Goban Spur and the NW Iberian Margin. The ... [more ▼]

Barium (Ba), aluminium (Al), and zirconium (Zr) were measured in sediment trap material deployed at two margin settings of the NE Atlantic: the Bay of Biscaye at Goban Spur and the NW Iberian Margin. The Particulate Organic Carbon (POC)/Ba ratios of the trapped material in both margin environments are clearly higher compared to the open ocean. Although lateral advection of POC may partly explain these higher POC/Ba ratios for margin systems, it is clear that the yield of authigenic particulate Ba during organic matter degradation in the water column is lower in margin environments. In order to assess export production in margin settings we optimised transfer functions based on trapped Ba fluxes that were originally elaborated for open ocean settings. Calculations of export production based on trapped Ba flux and POC/Ba ratio were compared with calculations based on trapped POC flux only. Export production based on Ba flux show greater internal consistency amongst traps along the same mooring, suggesting that this approach has advantages over the one based on POC flux only. Estimated export productions are of the same order of magnitude as estimates of new production, but systematically fall short of the latter. This systematic discrepancy needs further investigation. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

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See detailReconstructing historical atmospheric mercury deposition in Western Europe using: Misten peat bog cores, Belgium
Allan, Mouhamd ULg; le roux, gael; E. Sonke, Jeroen et al

in Science of the Total Environment (2013), 442

Four sediment cores were collected in 2008 from the Misten ombrotrophic peat bog in the Northern part of the Hautes Fagnes Plateau in Belgium. Total mercury (Hg) concentrations were analyzed to ... [more ▼]

Four sediment cores were collected in 2008 from the Misten ombrotrophic peat bog in the Northern part of the Hautes Fagnes Plateau in Belgium. Total mercury (Hg) concentrations were analyzed to investigate the intra-site variability in atmospheric Hg deposition over the past 1500 years. Mercury concentrations in the four cores ranged from 16 to 1100 μg kg− 1, with the maxima between 840 and 1100 μg kg− 1. A chronological framework was established using radiometric 210Pb and 14C dating of two cores (M1 and M4). Pollen horizons from these two cores were correlated with data from two additional cores, providing a consistent dating framework between all the sites. There was good agreement between atmospheric Hg accumulation rates in the four cores over time based on precise age dating and pollen chronosequences. The average Hg accumulation rate before the influence of human activities (from 500 to 1300 AD) was 1.8 ± 1 μg m− 2 y− 1 (2SD). Maximum Hg accumulation rates ranged from 90 to 200 μg m− 2 y− 1 between 1930 and 1980 AD. During the European–North American Industrial Revolution, the mean Hg accumulation rate exceeded the pre-Industrial values by a factor of 63. Based on comparisons with historical records of anthropogenic activities in Europe and Belgium, the predominant regional anthropogenic sources of Hg during and after the Industrial Revolution were coal burning and smelter Hg emissions. Mercury accumulation rates and chronologies in the Misten cores were consistent with those reported for other European peat records. [less ▲]

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See detailReconstructing neutrino properties from collider experiments in a Higgs triplet neutrino mass model
Aristizabal Sierra, Diego ULg; Hirsch, M.; Valle, J. W. F. et al

in Physical Review. D : Particles and Fields (2003), 68

We extend the minimal supersymmetric standard model with bilinear R-parity violation to include a pair of Higgs triplet superfields. The neutral components of the Higgs triplets develop small vacuum ... [more ▼]

We extend the minimal supersymmetric standard model with bilinear R-parity violation to include a pair of Higgs triplet superfields. The neutral components of the Higgs triplets develop small vacuum expectation values (VEVs) quadratic in the bilinear R-parity breaking parameters. In this scheme the atmospheric neutrino mass scale arises from bilinear R-parity breaking while for reasonable values of parameters the solar neutrino mass scale is generated from the small Higgs triplet VEVs. We calculate neutrino masses and mixing angles in this model and show how the model can be tested at future colliders. The branching ratios of the doubly charged triplet decays are related to the solar neutrino angle via a simple formula. [less ▲]

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See detailReconstruction and analysis of QuikSCAT wind measurements with an EOF-based technique
Troupin, Charles ULg; Alvera Azcarate, Aïda ULg; Beckers, Jean-Marie ULg

Poster (2012, April 24)

QuikSCAT wind products are often used to provide numerical model atmospheric forcing. However, due to the configuration of the satellite swaths, gaps are frequently observed in the daily wind maps. We ... [more ▼]

QuikSCAT wind products are often used to provide numerical model atmospheric forcing. However, due to the configuration of the satellite swaths, gaps are frequently observed in the daily wind maps. We present a solution based on truncated EOF decomposition to fill these gaps. [less ▲]

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See detailLa reconstruction congolaise
Kabamba, Bob ULg; Zacharie, Arnaud

Book published by Luc Pire (2009)

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See detailReconstruction de données satellitaires manquantes du lac Tanganyika
Leblanc, Christophe ULg

Master's dissertation (2007)

Ce mémoire présente une technique de reconstruction des données manquantes du lac Tanganyika basée sur une version modifiée de l’algorithme de décomposition en EOFs (Empirical Orthogonal Functions) et qui ... [more ▼]

Ce mémoire présente une technique de reconstruction des données manquantes du lac Tanganyika basée sur une version modifiée de l’algorithme de décomposition en EOFs (Empirical Orthogonal Functions) et qui consiste en l’utilisation d’une généralisation du théorème SVD (Singular Value Decomposition) des matrices aux tenseurs d’ordre trois. Les performances de ces deux algorithmes sont ensuite comparées sur les données satellitaires du lac Tanganyika fournies par Yves Cornet*, le but étant de reconstruire ces données sur toute la surface du lac. *Université de Liège Département de géographie / Unité de Géomatique - Télédétection et photogrammétrie. ycornet@ulg.ac.be [less ▲]

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See detailReconstruction de la papille: Un défi
LAMBERT, France ULg

Conference (2012)

La dentisterie esthétique moderne est principalement basée sur la bonne harmonie gingivodentaire. Le challenge pour restaurer l'esthétique d’un sourire est souvent de recréer cet équilibre entre les ... [more ▼]

La dentisterie esthétique moderne est principalement basée sur la bonne harmonie gingivodentaire. Le challenge pour restaurer l'esthétique d’un sourire est souvent de recréer cet équilibre entre les tissus mous et la réhabilitation prothétique. Au cours de cette session, nous aborderons plus spécifiquement l’aspect des tissus mous, de leur architecture, de leur intégration avec les éléments prothétiques et de leurs volumes, etc.... Un des éléments clef de cette architecture des tissus mous est la présence des papilles inter-dentaires. Les objectifs de cette session se résument en trois volets : Tout d’abord, le point sera fait sur les différentes causes des pertes papillaires. Nous envisagerons aussi comment les éviter ou les limiter à travers des actes chirurgicaux moins invasifs, en respectant davantage la physiologie des tissus parodontaux. La prévention de la perte des papilles passe aussi par le choix des matériaux et par les actes prothétiques. Ces aspects seront également discutés. Ensuite, le second objectif de cet exposé visera, en cas d’absence papillaire, à analyser la situation clinique et d’en définir le pronostique de régénération. Le pronostique est évalué sur base des connaissances actuelles issues de la littérature scientifique, et par le biais d’une bonne analyse esthétique et radiographique de la situation clinique. Dès lors, en fonction d’un pronostic favorable, modéré, ou défavorable, les options de reconstruction papillaire pourront être pondérées. Enfin, la dernière partie de cette conférence sera dédiée aux techniques et méthodes de régénération papillaires. À travers de nombreux cas cliniques, les différentes techniques de régénération des papilles, qu’elles soient chirurgicales, orthodontiques ou prothétiques, seront envisagées de manière systématique en fonction de la situation clinique initiale. En effet, une bonne analyse est impérative pour le choix de la technique optimale. [less ▲]

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See detailReconstruction de paramètres environnementaux à l'aide des GNSS: une opportunité pour les entreprises
Warnant, René ULg

Conference given outside the academic context (2010)

Detailed reference viewed: 19 (2 ULg)