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See detailInter- and intraday variability of Flemish travel behavior
Cools, Mario ULg

Doctoral thesis (2009)

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See detailInter- and Intraspecific Genetic Biodiversity in South East Asian Rodents: New Insights for Their Conservation
Pagès, Marie ULg; Latinne, Alice ULg; Michaux, Johan ULg

in Zachos, F. E.; Habel, J. C. (Eds.) Biodiversity Hotspots (2011)

South East Asia displays a high level of mammal endemism and the <br />highest number of threatened and data deficient mammal species. However, the <br />South East Asian biodiversity is still highly ... [more ▼]

South East Asia displays a high level of mammal endemism and the <br />highest number of threatened and data deficient mammal species. However, the <br />South East Asian biodiversity is still highly unexplored. Because of the runaway <br />global changes, a better biological knowledge of this region is urgently required to <br />improve the conservation and the management of its biodiversity. <br />The first aim of this chapter is to present recent published data on a biodiversity <br />inventory of the Rattini murine rodents from this region based on molecular markers <br />(Page`s et al., 2009). In this first study, we applied the method proposed by Pons et al. <br />(2006) that determines with no a priori the locations of ancestral nodes that define <br />putative species in order to investigate the current taxonomy of the Rattini tribe. <br />Our second aim concerns the intraspecific genetic structure of a rare and <br />threatened South East Asian mammal species: the murine rodent Leopoldamys <br />neilli, endemic to karst habitats . In this latter study, our results evidenced a high <br />geographic structure of the genetic diversity of this species. The observed highly <br />divergent genetic lineages would have to be considered as distinct evolutionary <br />units or at least as Management units. These results are essential for the best <br />conservation issues of species endemic to karsts and to South East Asia, in general. <br />In this chapter, we therefore highlight that South East Asia would not be only a <br />hotspot of interspecific but also of intraspecific biodiversity. [less ▲]

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See detailInter- and Intravarietal variability of the trypsin inhibitors content of peas and his influence on apparent digestibility of crude proteins by growing pigs.
Leterme, Pascal; Beckers, Yves ULg; Thewis, André ULg

in Huisman, J.; van der Poel, T. F.; Liener, I. E. (Eds.) Recent advances of research in antinutritional factors in legume seeds: animal nutrition, feed technology, analytical methods (1989)

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See detailInter- and intravarietal variability of the trypsin inhibitors content of peas and its influence on apparent digestibility of crude protein by growing pigs
Leterme, Pascal; Beckers, Yves ULg; Thewis, André ULg

in Huismans, J; Van der Poel, TFJ; Liener, IE (Eds.) Recent Advances of Research in Antinutritional Factors in Legume Seeds (1988)

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See detailInter-annual variability of the carbon dioxide oceanic sink south of Tasmania
Borges, Alberto ULg; Tilbrook, B.; Metzl, N. et al

Poster (2007, April)

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See detailInter-annual variability of the carbon dioxide oceanic sink south of Tasmania
Borges, Alberto ULg; Tilbrook, B.; Metzl, N. et al

Conference (2007, April)

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See detailInter-annual variability of the carbon dioxide oceanic sink south of Tasmania
Borges, Alberto ULg; Tilbrook, B.; Metzl, N. et al

in Biogeosciences (2008), 5(1), 141-155

We compiled a large data-set from 22 cruises spanning from 1991 to 2003, of the partial pressure of CO2 (pCO(2)) in surface waters over the continental shelf (CS) and adjacent open ocean (43 degrees to 46 ... [more ▼]

We compiled a large data-set from 22 cruises spanning from 1991 to 2003, of the partial pressure of CO2 (pCO(2)) in surface waters over the continental shelf (CS) and adjacent open ocean (43 degrees to 46 degrees S; 145 degrees to 150 degrees E), south of Tasmania. Climatological seasonal cycles of pCO(2) in the CS, the subtropical zone (STZ) and the subAntarctic zone (SAZ) are described and used to determine monthly pCO(2) anomalies. These are used in combination with monthly anomalies of sea surface temperature (SST) to investigate inter-annual variations of SST and pCO(2). Monthly anomalies of SST (as intense as 2 degrees C) are apparent in the CS, STZ and SAZ, and are indicative of strong inter-annual variability that seems to be related to large-scale coupled atmosphere-ocean oscillations. Anomalies of pCO(2) normalized to a constant temperature are negatively related to SST anomalies. A reduced winter-time vertical input of dissolved inorganic carbon (DIC) during phases of positive SST anomalies, related to a poleward shift of westerly winds, and a concomitant local decrease in wind stress is the likely cause of the negative relationship between pCO(2) and SST anomalies. The observed pattern is an increase of the sink for atmospheric CO2 associated with positive SST anomalies, although strongly modulated by inter-annual variability of wind speed. Assuming that phases of positive SST anomalies are indicative of the future evolution of regional ocean biogeochemistry under global warming, we show using a purely observational based approach that some provinces of the Southern Ocean could provide a potential negative feedback on increasing atmospheric CO2. [less ▲]

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See detailInter-annual variability of the carbon dioxide oceanic sink south of Tasmania
Borges, Alberto ULg; Tilbrook, B.; Metzl, N. et al

Poster (2008)

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See detailINTER-BAND COHERENCE OF SPLIT WIDE BAND SAR IMAGES; A POTENTIALLY NEW INFORMATION CHANNEL
De Rauw, Dominique ULg; Orban, Anne ULg; Barbier, Christian ULg

in EARSel Newsletter (2009), 79

Recently-launched SAR sensors like TerraSAR-X or CosmoSkyMed are equipped with wide bandwidth radar signal emitters. Working at large bandwidth allows reaching metric range resolution, which combined with ... [more ▼]

Recently-launched SAR sensors like TerraSAR-X or CosmoSkyMed are equipped with wide bandwidth radar signal emitters. Working at large bandwidth allows reaching metric range resolution, which combined with spotlight mode, leads to Very High Resolution (VHR) SAR imagery. One can also take advantage of this wide band to split it into sub-bands and generate several lower resolution images from the same master one, each centered on a slightly different cen- tral frequency. These sub-images can then be used in a classical interferometric process to estimate inter- band coherence of a given scene. This inter-band coherence reveals scatterers keeping a stable phase behaviour along with frequency shift. In this paper, a simple model derived from Zebker model for randomly distributed surface scatterers is proposed and examples are pre- sented showing that scatterers can have a behaviour that deviates from the model, leading to a new information channel. [less ▲]

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See detailInter-individual variability of teachers' feedback: Study in simulated teaching conditions
Cloes, Marc ULg; Denève, Alain; Piéron, Maurice ULg

in European Physical Education Review (1995), 1(1), 83-93

Dans l'enseignement des activités physiques, les réactions de l'enseignant à la prestation des élèves (feedback) constituent l'une des variables déterminantes dans la réussite pédagogique. Les réactions à ... [more ▼]

Dans l'enseignement des activités physiques, les réactions de l'enseignant à la prestation des élèves (feedback) constituent l'une des variables déterminantes dans la réussite pédagogique. Les réactions à la prestation se caractérisent par une grande variabilité interindividuelle. Leur émission fait suite à un processus comportant deux phases: le diagnostic et la prescription. Afin de mettre en évidence le rôle exercé par les facteurs liés aux caractéristiques de l'enseignant sur celles de leurs interventions, nous avons comparé les réactions à la prestation émises par 12 éducateurs physiques lors d'une séance d'enseignement simulé. Grâce à cette technique vidéo, les sujets réagissent à partir de performances motrices identiques. Les feedback ont été comparés entre quatre groupes de sujets caractérisés par des niveaux d'expérience sportive et pédagogique similaires. Une analyse factorielle par correspondance a permis d'identifier des classes de sujets émettant des feedback de même type. Les résultats tendent à souligner que (1) le niveau d'expertise dans la pratique de l'activité enseignée exerce une influence sur la première de ces phases; (2) le degré d'expertise pédagogique contribue à améliorer l'émission du message. [less ▲]

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See detailInter-method variability in bone alkaline phosphatase measurement : clinical impact on the management of dialysis patients
CAVALIER, Etienne ULg; Souberbielle, Jean-Claude; GADISSEUR, Romy ULg et al

in Clinical Biochemistry (2014), 47(13-14), 1227-30

BACKGROUND: Bone-specific alkaline phosphatase (BAP) is now recommended to assess bone turnover in hemodialysis (HD) patients. However, little is known about potential variability between methods ... [more ▼]

BACKGROUND: Bone-specific alkaline phosphatase (BAP) is now recommended to assess bone turnover in hemodialysis (HD) patients. However, little is known about potential variability between methods available to measure BAP. METHODS: We measured BAP in 76 HD patients with six different assays (Beckman-Coulter Ostase IRMA, Beckman-Coulter Ostase Access, IDS iSYS Ostase, IDS Ostase enzyme immunoassay, DiaSorin Liaison Ostase and Quidel MicroVue BAP). RESULTS: We observed a high correlation between all the assays ranging from 0.9948 (IDS iSYS vs. IDS EIA) to 0.9215 (DiaSorin Liaison vs. Quidel MicroVue). However, using the regression equations, the equivalent concentration of a Beckman-Coulter Access value of 10μg/L can range from 7.7 to 14.4μg/L and of 20μg/L can range from 16.9 to 27.9μg/L with other assays. According to Beckman-Coulter Access, 13%, 50% and 37% of the patients presented BAP values ≤10, between 10 and 20 and ≥20μg/L, respectively. Discrepancies are observed when other assays are used (concordance from 10 to 100%). CONCLUSIONS: Analytical problems leading to inter-method variation should be overcome to improve the usefulness of this marker in clinical practice. According to correlation results, recalibration of BAP assays is necessary but should not be a major issue. [less ▲]

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See detailInter-modal freight terminal location in Europe : a strategic model
Jourquin, Bart; Limbourg, Sabine ULg

in Proceedings of the BIVEC-GIBET, Transport Research Day 2007 (2007)

The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the possible solutions, but its efficiency ... [more ▼]

The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the possible solutions, but its efficiency strongly depends on the places where the container terminals are located. The number of possible locations on large scale networks becomes rapidly too large to be taken as input by exact location methods. That’s why the first goal of this paper is to outline a method that helps to identify the best potential locations out of the thousands of potential nodes. The basic idea is to use the flows of commodities and their geographic spreading as input to determine a set of good potential locations for transfer inter-modal terminals. This set can, in a second step, be used as input for already well known optimal location models in order to identify the optimal locations for container terminals in Europe. The methodology is illustrated over the whole trans-European networks. The paper concludes with a discussion of the results: the model predicts a reduction of the total transportation costs on the network and a modal shift from road to rail. It also evaluates the new modal shift and other indicators [less ▲]

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See detailInter-modal freight terminal location in Europe: a strategic model
Limbourg, Sabine ULg

Conference (2006)

The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the (partial) possible solutions, but its ... [more ▼]

The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the (partial) possible solutions, but its efficiency strongly depends on the places where the container terminals are located. The number of possible locations on large scale networks such as the European one becomes rapidly too large to be taken as input by exact location methods. That’s why the first goal of this paper is to outline a method that helps to identify the best potential locations out of the thousands of potential nodes. The basic idea is to use the flows of commodities and their geographic spreading as input to determine a set of good potential locations for transfer inter-modal terminals. This set can, in a second step, be used as input for already well known optimal location models in order to identify the optimal locations for container terminals in Europe. The complete methodology is illustrated by means on a case study that concerns multi-modal transport over the whole trans-European networks. [less ▲]

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See detailInter-modal freight terminals location: Discover the best potential locations on large networks
Limbourg, Sabine ULg; Jourquin, Bart

Conference (2005)

The optimal location of a facility is a rather complex task that was already studied many times. Several optimal location problems and solution exists, but only a few can be applied to the location of ... [more ▼]

The optimal location of a facility is a rather complex task that was already studied many times. Several optimal location problems and solution exists, but only a few can be applied to the location of multimodal freight terminals. Among the possible approaches, if theoretical solutions can be found in the literature, the computational complexity of the proposed methods make them impossible to be applied to real world large geographical networks. Indeed, many of them are based on linear programming, for which the number of constraints drastically increases with the number of terminals to take into account. This paper identifies the possible existing theoretical exact solutions and the framework of a new approach, in which the initial set of potential terminals is computed by means of the results obtained by the assignment of the flows of commodities on the trans-European network [less ▲]

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See detailInter-Modal Terminals for Freight
Limbourg, Sabine ULg; Jourquin, Bart

Conference (2005)

The optimal location of terminals and logistic centres is an up-to-date research topic. The first goal of this paper is to outline a method that helps to isolate the best potential locations. The basic ... [more ▼]

The optimal location of terminals and logistic centres is an up-to-date research topic. The first goal of this paper is to outline a method that helps to isolate the best potential locations. The basic idea is to use the flows of commodities and their geographic spreading as input to determine a set of good potential locations for inter-modal terminals on the trans-European networks. This set can then be used in conjunction with already known optimal location models. Some approaches to solve the optimal location problems will be briefly presented. After that, the method used to obtain a detailed O-D matrix for European international freight traffic will be outlined, in addition to a short explanation on the way the demand can be assigned on a multi-modal freight transportation network. The assigned flow will be used as input to compute a set of potential locations. [less ▲]

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See detailInter-observer variation in the histopathological diagnosis of clinically suspicious pigmented skin lesions.
Brochez, Lieve; Verhaeghe, Evelien; Grosshans, Edouard et al

in Journal of Pathology (The) (2002), 196(4), 459-66

When a biopsy is taken of a suspicious pigmented skin lesion, histological examination is expected to establish the definitive diagnosis. This study evaluated the inter-observer variation of 20 ... [more ▼]

When a biopsy is taken of a suspicious pigmented skin lesion, histological examination is expected to establish the definitive diagnosis. This study evaluated the inter-observer variation of 20 pathologists in the histological diagnosis of a randomly selected set of suspicious pigmented skin lesions (PSLs), by comparing their diagnoses to a reference diagnosis. Overall sensitivity for melanoma was 87%, ranging from 55% to 100% between the observers. Sensitivity was significantly lower for thin (Breslow thickness <1 mm) than for thick melanomas (83% versus 97%, p=0.005). Overall melanoma specificity was 94%, ranging from 83% to 100% between observers. Dysplastic naevus was the most important source of false-positive diagnoses, mainly in situ melanomas. Positive and negative predictive values in the given test set were 75% and 97%, respectively. In the case of melanoma, there was quite some variation in measured Breslow thickness. This would have led to a different therapeutic approach in 12% of the readings. Some of the variation seemed to be due to a different interpretation of the presence of a co-existent naevus. In 9% (3/35) of the readings, participants did not agree on the presence of ulceration. These results reflect a tendency to overdiagnose mainly thin melanomas in general histopathological practice. They also demonstrate variation in the assessment of major prognostic factors of melanoma. [less ▲]

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