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See detailHow Not to Die in Venice : The Art of Arakawa and Madeline Gins
Delville, Michel ULg

in dworkin, Craig (Ed.) Architectures of Poetry (2004)

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See detailHow novice and expert drivers adjust their driving behavior when they feel drowsy?
Berastegui, Pierre ULg; Piette, Christine; François, Clémentine ULg et al

Poster (2015, July 29)

This paper aims to explore adaptive behaviors developed by drivers to prevent drowsiness. Specifically, we postulate that driving expertise is associated with better drowsiness awareness, allowing experts ... [more ▼]

This paper aims to explore adaptive behaviors developed by drivers to prevent drowsiness. Specifically, we postulate that driving expertise is associated with better drowsiness awareness, allowing experts to adequately adjust their driving behaviors when they feel drowsy. The present study was carried on a high-fidelity driving simulator coupled with an innovative system allowing objective sleepiness assessment based on EEG and Eye-tracking data. The Karolinska Sleepiness Scale was used to evaluate subjective drowsiness. The ratio between objective and subjective assessments gave an indicator of drowsiness awareness. Standard Deviation of Lateral Position (SDLP) was used as a measure of performance while driving speed and ocular fixations were recorded in order to highlight adaptive behaviors. 16 subjects were recruited from general population and categorized in two groups of expertise based on the Belgian Institute for Road Safety’s criteria. Our results show that expert drivers show better drowsiness awareness than novices and mobilize speed increasing and vigilance reallocation strategies to maintain satisfactory level of drowsiness. [less ▲]

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See detailHow nurses support students' reflective learning in clinical placements?
Dury, Cécile ULg

Conference (2013, September 06)

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See detailHow Old Is Old Enough to Vote. Youth Participation in Society
Hudon, Raymond; Fournier, Bernard ULg

in Perspectives électorales/Electoral Insight (2003), 5(2), 38-43

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See detailHow phosphorus limitation can control climate-active gas sources and sinks
Gypens, Nathalie; Borges, Alberto ULg; Ghyoot, Caroline

in Journal of Marine Systems (2017), 170

Since the 1950's, anthropogenic activities have increased nutrient river loads to European coastal areas. Subsequent implementation of nutrient reduction policies have led to considerably reduction of ... [more ▼]

Since the 1950's, anthropogenic activities have increased nutrient river loads to European coastal areas. Subsequent implementation of nutrient reduction policies have led to considerably reduction of phosphorus (P) loads from the mid-1980's, while nitrogen (N) loads were maintained, inducing a P limitation of phytoplankton growth in many eutrophied coastal areas such as the Southern Bight f the North Sea (SBNS). When dissolved inorganic phosphorus (DIP) is limiting, most phytoplankton organisms are able to indirectly acquire P from dissolved organic P (DOP). We investigate the impact of DOP use on phytoplankton production and atmospheric fluxes of CO2 and dimethylsulfide (DMS) in the SBNS from 1951 to 2007 using an extended version of the RMIRO-BIOGAS model. This model includes a description of the ability of phytoplankton organisms to use DOP as a source of P. Results show that primary production can increase up to 30% due to DOP uptake under limiting DIP conditions. Consequently, simulated DMS emissions also increase proportionally while CO2 emissions to the atmosphere decrease, relative to the reference simulation without DOP uptake [less ▲]

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See detailHow phosphorus limitation can control climatic gas emission
Gypens; Borges, Alberto ULg; Speeckaert, Gaëlle ULg et al

Conference (2015, April 12)

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See detailHow powerful is demography? The Serendipity Theorem revisited
Pestieau, Pierre ULg; de la Croix, David; Ponthiere, Gregory

in Journal of Population Economics (2012), 25

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See detailHow precisely will the total cross section be measured at the LHC?
Cudell, Jean-René ULg; Selyugin, O. V.

in Physical Review Letters (2009), 102

It is very likely that hadronic scattering will enter a new regime at the LHC, as the black-disk limit is reached. This will lead to a severe change in the t dependence of the real part and of the slope ... [more ▼]

It is very likely that hadronic scattering will enter a new regime at the LHC, as the black-disk limit is reached. This will lead to a severe change in the t dependence of the real part and of the slope of the elastic scattering amplitude, and in turn this may bias the measurement of the total cross section. We examine this issue, and suggest new strategies to test the reliability of the total cross section measurements. [less ▲]

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See detailHow pristine is the Congo Basin forest ? Some answers from Erythrophleum spp. (Caesalpiniaceae) and Pericopsis elata (Fabaceae) natural stands in southeastern Cameroon
Bourland, Nils ULg; Livingstone Smith, Alexandre; Guion, Hélène ULg et al

Poster (2012, March 01)

Erythrophleum spp. and Pericopsis elata are two important African timber taxa suffering from regeneration problems. Those light demanding trees could have established in openings made by past human ... [more ▼]

Erythrophleum spp. and Pericopsis elata are two important African timber taxa suffering from regeneration problems. Those light demanding trees could have established in openings made by past human activities (mainly slash-and-burn cultivation). Our study aimed at verifying this assumption in a 340,000 ha forest concession in southeastern Cameroon. Anthracological excavations were made alongside transects opened in patches where those taxa occur as well as the surrounding environment. Numerous charcoal elements and some pottery fragments were found in excavated soils in all studied sites. Charcoals and pieces of pottery were found within the first 100 and 50 cm of soil, respectively. According to radiocarbon dating conducted on charcoals and burnt seeds, fires occurred between 2,150 to 195 years BP. This finding was consistent with the analysis of archaeological materials decoration techniques. Our results revealed intense past anthropological activities in this area, seriously questioning the assumption of a pristine Congo Basin [less ▲]

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See detailHow relative humidity affects random packing experiments
Vandewalle, Nicolas ULg; Lumay, Geoffroy ULg; Ludewig, François ULg et al

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2012), 85

The influence of relative humidity (RH) on the extremely slow compaction dynamics of a granular assembly has been experimentally investigated. Millimeter-sized glass beads are considered. Compaction ... [more ▼]

The influence of relative humidity (RH) on the extremely slow compaction dynamics of a granular assembly has been experimentally investigated. Millimeter-sized glass beads are considered. Compaction curves are fitted by stretched exponentials with characteristic time τ and exponent δ, which are seen to be deeply affected by the moisture content. A kinetic model, taking into account both triboelectric and capillary effects, is in excellent agreement with our results. It confirms the existence of an optimal condition at a relative humidity ≈45% for minimizing cohesive interactions between glass beads. The exponent δ is seen to depend strongly on the diffusive character of grains and voids inside the packing: diffusion for cohesiveless particles and subdiffusion when cohesion plays a role. As a consequence, the RH represents a relevant parameter that should be reported for every experimental work on a slowly driven dense random packing. [less ▲]

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See detailHow relevant is the wall shear stress to describe the cleanability of a solid surface ?
Detry, Jean; Jensen, B.; Deroanne, Claude et al

Poster (2007, November)

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See detailHow relevant is the wall shear stress to describe the cleanability of a solid surface ?
Detry, Jean; Jensen, B.; Deroanne, Claude et al

in Abstracts du "EHEDG - EFFoST joint conference" (2007, November)

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See detailHow reliable are the models to study recent climate change ? A study of heat/cold waves and radiative fluxes trends over 1900-2010 using the model MAR in Belgium
Wyard, Coraline ULg; Fettweis, Xavier ULg; Scholzen, Chloé ULg

Poster (2016, August 29)

This research aims to assess the ability of the regional climate model MAR ("Modèle Atmosphérique Régional") to reconstruct the observed twentieth century climatology of extreme events and solar radiation ... [more ▼]

This research aims to assess the ability of the regional climate model MAR ("Modèle Atmosphérique Régional") to reconstruct the observed twentieth century climatology of extreme events and solar radiation in Belgium, as a necessary condition for reliable future projections. Simulations were performed by forcing MAR with several reanalyses: the ERA40/ERA-Interim, the ERA-20C and the NCEP/NCAR-v1. The results suggests that increasing air temperature would have generated decreasing relative humidity which would have lead to a decrease in cloudiness and an increase in solar downward radiation. This research illustrates the dependency between RCMs and their forcings. The forcing reanalyses can generate divergent trends while contrary to Global Climate Models (GCM), the reanalyses assimilate observations and are supposed to represent the same climate. [less ▲]

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See detailHow robust are district health systems? Coping with crisis and disasters in Rutshuru, Democratic Republic of Congo.
Porignon, Denis ULg; Soron'Gane, E. M.; Lokombe, T. E. et al

in Tropical medicine & international health : TM & IH (1998), 3(7), 559-65

BACKGROUND: Since the eighties, the North Kivu Province socio-economic environment has been deteriorating. This province also faced an influx of Rwandan refugees in July 1994. The objective of the paper ... [more ▼]

BACKGROUND: Since the eighties, the North Kivu Province socio-economic environment has been deteriorating. This province also faced an influx of Rwandan refugees in July 1994. The objective of the paper is to show how a rural health district has been able to adjust and maintain its medical activities under unfavourable conditions. METHOD: Performances of the local health system were assessed through the analysis of routine medical data collected in the Rutshuru Health District (RHD) between 1985 and 1995. Specific data collected during the Rwandan refugee crisis measured the workload of RHD due to the refugees. RESULTS: For 11 years, health infrastructures have remained accessible and functional in RHD. The curative utilization and preventive coverage rates increased. Obstetrical activities were intensified from a quantitative as well as from a qualitative point of view. Between July and October 1994, the RHD treated 65000 cases of various pathological conditions in Rwandan refugees settled outside the camps. This corresponds to 9.3% of consultations for Rwandan refugees settled on RHD's territory and represents a 400% increase in the curative workload for the RHD health services. Human and financial resources remained at a very low level, especially when compared with those available in the camps through relief agencies. CONCLUSION: The RHD was severely affected by various stresses but its services managed to provide significant and efficient response to these crises. Health district systems may constitute an effective tool to provide health care under adverse conditions. [less ▲]

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See detailHow Service Managers Can Shape Frontline Employees' Organizational Values to Reduce Person-Role Conflicts
Selzer, Veronika Luisa; Schumann, Jan Hendrik; Büttgen, Marion et al

Conference (2016, May)

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See detailHow shattered flakes were used : Micro-wear analysis of quartz flake fragments
Knutsson, Helena; Knutsson, Kjel; Taipale, Noora ULg et al

in Journal of Archaeological Science: Reports (2015), 2

Prehistoric quartz assemblages have always posed a special problem for archaeologists. Due to its brittle nature, quartz is hard to understand within lithic classification systems that are based on ... [more ▼]

Prehistoric quartz assemblages have always posed a special problem for archaeologists. Due to its brittle nature, quartz is hard to understand within lithic classification systems that are based on formally varied flint assemblages. In this paper we explore ways to deal with this problem by applying two analytical methods, fracture analysis and use-wear analysis. A sample of 544 unmodified quartz flakes and flake fragments from Mesolithic and Neolithic sites in Sweden and Finland was analysed. It can be concluded that both whole and fragmented flakes were used as tools. Larger flakes and flake fragments were preferred as tool blanks and the type of use was correlated to variation in edge qualities rather than the formal characteristics of flakes. The results of this investigation suggest that making behavioural inferences from quartz assemblages with low formal variability requires the assemblages to be approached with a focus on functional types. [less ▲]

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See detailHow should functional imaging of patients with disorders of consciousness contribute to their clinical rehabilitation needs?
Laureys, Steven ULg; Giacino, J. T.; Schiff, N. D. et al

in Current Opinion in Neurology (2006), 19(6), 520-527

Purpose of review We discuss the problems of evidence-based neurorehabilitation in disorders of consciousness, and recent functional neuroimaging data obtained in the vegetative state and minimally ... [more ▼]

Purpose of review We discuss the problems of evidence-based neurorehabilitation in disorders of consciousness, and recent functional neuroimaging data obtained in the vegetative state and minimally conscious state. Recent findings Published data are insufficient to make recommendations for or against any of the neurorehabilitative treatments in vegetative state and minimally conscious state patients. Electrophysiological and functional imaging studies have been shown to be useful in measuring residual brain function in noncommunicative brain-damaged patients. Despite the fact that such studies could in principle allow an objective quantification of the putative cerebral effect of rehabilitative treatment in the vegetative state and minimally conscious state, they have so far not been used in this context. Summary Without controlled studies and careful patient selection criteria it will not be possible to evaluate the potential of therapeutic interventions in disorders of consciousness. There also is a need to elucidate the neurophysiological effects of such treatments. Integration of multimodal neuroimaging techniques should eventually improve our ability to disentangle differences in outcome on the basis of underlying mechanisms and better guide our therapeutic options in the challenging patient populations encountered following severe acute brain damage. [less ▲]

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See detailHow should proxies of Cognitive Reserve be evaluated in a population of healthy older adults?
Grotz, Catherine ULg; Seron, Xavier; Van Wissen, Marie et al

in International Psychogeriatrics (2017), 29(1), 123-136

Background: While some tools have been developed to estimate an individual’s cognitive reserve (CR), no study has assessed the adequacy of the method used for assessing these CR proxy indicators ... [more ▼]

Background: While some tools have been developed to estimate an individual’s cognitive reserve (CR), no study has assessed the adequacy of the method used for assessing these CR proxy indicators. Therefore, we aimed to determine the most appropriate method to estimate CR by comparing two approaches: 1) the common assessment of CR proxies in the literature (e.g., years of education) and 2) the calculation of a comprehensive index based on most significant parameters used in the estimation of CR. Methods: Data on CR proxies: (i.e., education, occupation and leisure activities) were obtained in a sample of 204 older adults. Regression analyses were used to develop the two indices of CR (i.e., ICR-standard and ICR-detailed) and to determine which index best represented the level of one’s CR. Results: The ICR-standard was calculated using a combination of the three most common measures of reserve in the literature: number of schooling years, complexity of the primary occupation and amount of current participation in stimulating activities. The ICR-detailed was calculated using the most significant parameters (established in initial analyses) of CR: highest level of education combined with the number of training courses, last occupation and amount of current participation in social and intellectual activities. The comparison of both indices showed that higher levels of ICR-standard and ICR-detailed were associated with a greater minimization of the effects of age on cognition. However, the ICR-detailed was more strongly associated to this minimization than the ICR-standard, suggesting that the ICR-detailed best reflect one’s CR. Conclusion: This study is the first to show that it is of great importance to question methods measuring CR proxies in order to develop a clinical tool allowing a comprehensive and accurate estimation of CR. [less ▲]

Detailed reference viewed: 102 (10 ULg)