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See detailGlobal modelling of structures in fire
Gillie, M.; Burgess, I.; Franssen, Jean-Marc ULg et al

in Mazzolani, Federico (Ed.) Proceedings of Urban Habitat Constructions under Catastrophic Events (COST Action C26) (2008)

Detailed reference viewed: 73 (3 ULg)
See detailGlobal modelling of structures in fire
Gillie, Martin; Burgess, Ian; Franssen, Jean-Marc ULg et al

in Urban Habitat Constructions under catastrophic events - Technical sheets – Fire Resistance (2009)

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See detailGlobal morphology of substorm growth phases observed by the IMAGE-SI12 imager
Coumans, Valérie ULg; Blockx, Caroline ULg; Gérard, Jean-Claude ULg et al

in Journal of Geophysical Research (2007), 112(A11),

We present case studies and a statistical summary of optical observations of proton precipitation made during substorm growth phases. Our analysis is based on observations of the Doppler-shifted Lyman ... [more ▼]

We present case studies and a statistical summary of optical observations of proton precipitation made during substorm growth phases. Our analysis is based on observations of the Doppler-shifted Lyman-alpha auroral emission obtained with the SI12 Spectrographic Imager on board the IMAGE satellite. These images are used to determine the morphology and dynamics of the auroral oval and of the polar cap boundary on a global scale, as well as the total open magnetic flux and its time evolution. We also investigate the relationship with the solar wind and the interplanetary magnetic field ( IMF) characteristics measured by the ACE satellite and with the magnetic elevation angle measured by GOES-8. The statistical study shows that the sector of maximum proton precipitation during the growth phase is on average centered around 2200 MLT and rapidly shifts in local time by about 1.2 h toward midnight at the time of the onset. The open magnetic flux increases by 33% on average during the growth phase. The mean value of the open flux immediately before the substorm onset is about 0.66 GWb for substorms triggered by a northward turning of B-z and 0.74 GWb for nontriggered substorms. The averaged open flux at the substorm onset is smallest when the substorm is triggered by a sudden reversal of B-z, suggesting that the accumulation of energy by the magnetosphere is perturbed by changes in B-z. The open magnetic flux continues to increase during the 20 min following the onset, for a large number of events. The rate of equatorward displacement of the auroral oval boundaries during growth phase is typically similar to 3 deg/h. It is statistically correlated (r=0.40) with the magnitude of the Bz component of the IMF measured by the ACE satellite. It is also correlated, with higher coefficient (r=0.54), with functions describing the efficiency of solar wind energy transfer involving the transverse electric field carried by the solar wind. The equatorward motion may be global, restricted to local time sectors or a combination of both. At no nightside local time sector does the motion of the equatorial boundary appear more pronounced than at others, but the maximum displacement of the polar boundary is statistically located around midnight MLT. [less ▲]

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See detailGlobal morphology of substorm growth phases observed by the IMAGE-SI12 imager
Blockx, Caroline ULg; Gérard, Jean-Claude ULg; Coumans, Valérie ULg et al

Poster (2007)

Growth phases are observed to start from less than 30 minutes to over an hour before the substorm onset. The sector of maximum proton precipitation during the growth phase is generally located around 2200 ... [more ▼]

Growth phases are observed to start from less than 30 minutes to over an hour before the substorm onset. The sector of maximum proton precipitation during the growth phase is generally located around 2200 MLT. It rapidly moves in local time by about 1.2 hour toward midnight at the time of the onset. The open magnetic flux increases by as much as a 33% during the growth phase. The mean value of the open flux at the end of the growth phase, immediately preceding the substorm, onset is about 0.74. GWb for substorms triggered by external (solar wind) factors and 0.67 GWb for non-triggered substorms. The open magnetic flux generally drops following the onset of triggered substorms but continues to increase for non-triggered events. We interpret this behavior as an indication that the rate of opening of closed field lines on the dayside can exceed that of the nightside reconnection after the onset in non-triggered substorms. By contrast, flux closure is more efficient while the flux opening rate drops in the case of externally triggered onset, so that the closure rate exceeds that of field line opening on the dayside. The rate of equatorward displacement is typically ~ 3 deg/hour. It is statistically correlated with the magnitude of the southward Bz component of the IMF measured by the ACE satellite. It is also correlated with transfer functions describing the efficiency of solar wind energy transfer which involve the transverse electric field carried by the solar wind. The equatorward motion may be global, restricted to local time sectors or a combination of both. No nightside local time sector appears favored where the motion of the equatorial boundary would be more pronounced. The maximum displacement of the polar boundary is statistically located around midnight MLT. [less ▲]

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See detailGlobal multi-site (Subclavian, femoral and popliteal) and time-dependent evaluation of post-mortem redistribution of psychoactive drugs: Preliminary results
Lemaire, Eric ULg; DENOOZ, Raphael ULg; SCHMIDT, Carl et al

in Journal de Médecine Légale, Droit Médical (2014), 57(4), 51-58

Our study aimed to compare central blood concentration (subclavian site) with peripheral blood concentration (femoral and popliteal sites) of selected psychoactive substances. Time-dependent variation of ... [more ▼]

Our study aimed to compare central blood concentration (subclavian site) with peripheral blood concentration (femoral and popliteal sites) of selected psychoactive substances. Time-dependent variation of blood concentration is also assessed by means of two methods. To our knowledge, popliteal blood concentration has never been compared with other sites before.The results indicate that the popliteal sample site appears to be less subject to PMR as seen in the concentration ratios in the group with popliteal sampling. Cases sampled only once, as well as those sampled a second time, when correlated with the post-mortem interval, show that the latter did not have significant influence on concentration ratios, concentration difference ratios or concentration differences. [less ▲]

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See detailGlobal multivariate analysis of the plant life history: a reflection about the concept of evolutionary success
Cascales - Miñana, Borja ULg; Cleal, Christopher J.; Diez, José B.

Conference (2011, July)

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See detailGlobal Navigation Satellite Systems : A new tool in atmosphere sciences
Warnant, René ULg; Jodogne, Jean-Claude; Delobbe, Laurent et al

in Arijs, E.; Ducarme, B. (Eds.) Proceedings of the Earth Science Day : “Geodesy and Geophysics for the third Millenium in Belgium” (2005)

Detailed reference viewed: 37 (0 ULg)
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See detailGlobal observations of proton and electron auroras in a substorm
Mende, S. B.; Frey, H. U.; Lampton, M. et al

in Geophysical Research Letters (2001), 28

This is the first report of a substorm observed by the IMAGE FUV instruments permitting global observations of electron and proton produced auroras. On the 28th of June 2000 at 1956 UT in the pre-substorm ... [more ▼]

This is the first report of a substorm observed by the IMAGE FUV instruments permitting global observations of electron and proton produced auroras. On the 28th of June 2000 at 1956 UT in the pre-substorm phase at early evening local time the proton aurora was equatorward of the electron precipitation and near midnight they were collocated. There was bright electron and proton aurora in the post midday afternoon side. The sudden brightening of the aurora at substorm onset near midnight is seen in the electrons only although there are protons present at this location. During the expansive phase both the electrons and protons expand poleward. The electron aurora forms a bright surge at the poleward boundary while the protons just show diffuse spreading. The peak intensity of the protons did not change substantially during the entire event. The proton aurora is brighter on the dusk while the electron aurora on the dawn side. As the electron surge expands poleward it leaves the protons behind. The electrons form a discrete auroral feature near the aurora-polar cap boundary, which is devoid of substantial energetic (>1 keV) proton precipitation. The presence of precipitating protons at the point where the initial brightening is seen shows that substorms are initiated on closed field lines. [less ▲]

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See detailA global optimization method for naval structure op- timization
Bay, Maud ULg; Crama, Yves ULg; Rigo, Philippe ULg

Conference (2013, July 01)

The paper proposes a global optimization method for the preliminary structural design of large vessels in shipbuilding industry. We face a combinatorial problem of large size, with constraints modeled as ... [more ▼]

The paper proposes a global optimization method for the preliminary structural design of large vessels in shipbuilding industry. We face a combinatorial problem of large size, with constraints modeled as implicit functions with nonlinear behavior. We present a heuristic method that performs a global search over the feasible solution space, combining a large neighborhood search and a heuristic local search. Experiments on actual structural optimization problems show that the heuristic converges towards discrete feasible solutions of good quality. [less ▲]

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See detailGlobal optimization of the production and the distribution system for typical European HVAC systems
Randaxhe, François ULg; Lemort, Vincent ULg; Lebrun, Jean ULg

in Energy Procedia (2015), 78

European countries have agreed on a new 2030 Framework with a 30% improvement in energy efficiency compared to projection and a 40% cut in greenhouse gas emissions compared to 1990 levels. With an ... [more ▼]

European countries have agreed on a new 2030 Framework with a 30% improvement in energy efficiency compared to projection and a 40% cut in greenhouse gas emissions compared to 1990 levels. With an estimated 11% of all the electrical energy used in Europe consumed by HVAC systems, the improvement of their efficiency is a key element to reach these targets. When looking at the energy flow in typical European HVAC systems, one can observe important degradation in efficiency associated to heating and cooling energy transportation systems together with a non-optimal use of the production plant. These inefficiencies are direct consequences of the system design with, quite often, a lack of consideration of the system part load or its off-design operation. This research attempts to identify the sensitivity of both cooling and heating HVAC systems to these conditions and to propose an approach to optimize the design and the operation of HVAC systems integrated in buildings considering trade-off between primary systems efficiency, distribution losses and auxiliaries consumption. [less ▲]

Detailed reference viewed: 35 (10 ULg)
See detailA global overview of performance evaluation
Mouchamps, Hugues ULg

Conference (2011, March 04)

Performance evaluation presents two specific difficulties for social enterprises. At the one hand, it is complex to define what performance is, to measure the factors impacting performance through ... [more ▼]

Performance evaluation presents two specific difficulties for social enterprises. At the one hand, it is complex to define what performance is, to measure the factors impacting performance through indicators, and to sum up the scores of all the indicators. At the other hand, performance evaluation should vary with the purpose of the evaluation and the type of organization. Thus the characteristics of an ideal performance evaluation tool for social enterprises should both reflect this complexity and be contingent. [less ▲]

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See detailGlobal overview of the educational system in the French speaking Community of Belgium
Schillings, Patricia ULg; Gabelica, C.

E-print/Working paper (2007)

Detailed reference viewed: 6 (1 ULg)
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See detailGlobal parasite and Rattus rodent invasions: The consequences for rodent-borne diseases
Morand, Serge; Bordes, Frédéric; Chen, Hsuan-Wien et al

in Integrative Zoology (2015)

We summarize the current knowledge on parasitism-related invasion processes of the globally invasive Rattus lineages, originating from Asia, and how these invasions have impacted the local epidemiology of ... [more ▼]

We summarize the current knowledge on parasitism-related invasion processes of the globally invasive Rattus lineages, originating from Asia, and how these invasions have impacted the local epidemiology of rodent-borne diseases. Parasites play an important role in the invasion processes and successes of their hosts through multiple biological mechanisms such as "parasite release", "immunocompetence advantage", “biotic resistance” and "novel weapon". Parasites may also greatly increase the impact of invasions by spillover of parasites and other pathogens, introduced with invasive hosts, into new hosts potentially leading to novel emerging diseases. Another potential impact is the ability of the invader to amplify local parasites by spill-back. In both cases, local fauna and humans may be exposed to new health risks, which may decrease biodiversity and may potentially cause increases in human morbidity and mortality. Here we review the current knowledge on these processes and propose some research priorities. [less ▲]

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See detailGlobal population structure of the stable fly (Stomoxys calcitrans) inferred by mitochondrial and nuclear sequence data
Dsouli-Aymes, N.; Michaux, Johan ULg; De Stordeur, E. et al

in Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics of Infectious Diseases (2011), 11(2), 334-342

Stomoxys calcitrans (Diptera: Muscidae: Stomoxyini), a synanthropic fly with a worldwide distribution, is recognized to have an important medical and veterinary impact. We conducted a phylogeographic ... [more ▼]

Stomoxys calcitrans (Diptera: Muscidae: Stomoxyini), a synanthropic fly with a worldwide distribution, is recognized to have an important medical and veterinary impact. We conducted a phylogeographic analysis based on several populations from five major zoogeographic regions of the world in order to analyse population genetic structure of S. calcitrans and to trace its global dispersion. Results from mitochondrial (COI, Cyt-b and ND1-16S) and nuclear (ITS2) DNA show a substantial differentiation of Oriental populations (first lineage) from the Afrotropical, Palearctic, Nearctic, Neotropical and Oceanian populations (second lineage). The divergence time analyses suggest the separation between the two lineages approximately in mid-Pleistocene. Oriental populations are isolated and would not have participated in the colonization of other regions, unlike the Afrotropical one which seems to be the source of S. calcitrans dispersion towards other regions. Demographic analyses indicate that Oriental, Afrotropical and Palearctic regions have undergone a population expansion during late Pleistocene-early Holocene. The expansion time of this cosmopolitan species could have been influenced by continental human expansions and by animal domestication. © 2010 Elsevier B.V. [less ▲]

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See detailGlobal power grids for harnessing world renewable energy
Chatzivasileiadis, Spyros; Ernst, Damien ULg; Andersson, Göran

in Jones, Lawrence (Ed.) Renewable Energy Integration: Practical Management of Variability, Uncertainty and Flexibility in Power Grids (2014)

The Global Grid advocates the connection of all regional power systems into one electricity transmission system spanning the whole globe. Power systems are currently forming larger and larger ... [more ▼]

The Global Grid advocates the connection of all regional power systems into one electricity transmission system spanning the whole globe. Power systems are currently forming larger and larger interconnections. Environmental awareness and increased electricity consumption leads more investments towards renewable energy sources, abundant in remote locations (off-shore or in deserts). The Global Grid will facilitate the transmission of this “green” electricity to load centers, serving as backbone. This chapter elaborates on the concept presenting four stages that could gradually lead to the development of a globally interconnected power network. Quantitative analyses are carried out for all stages, demonstrating that a Global Grid is both technically feasible and economically competitive. Real price data from Europe and the USA are used to identify the potential of intercontinental electricity trade, showing that substantial profits can be generated through such interconnections. [less ▲]

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See detailGlobal prevalence and skeletal implications of vitamin D inadequacy
Reginster, Jean-Yves ULg; Richy, Florent; Rabenda, Véronique ULg et al

in Annals of the Rheumatic Diseases (2005, June), 64(Suppl.III), 362

Detailed reference viewed: 18 (4 ULg)
See detailA Global Procedure for the Measurement of Selected POPs in Food
PIRARD, Catherine ULg; Focant, Jean-François ULg

Scientific conference (2007, June)

Detailed reference viewed: 5 (0 ULg)
See detailA Global Procedure for the Measurement of Selected POPs in Food
Focant, Jean-François ULg; PIRARD, Catherine ULg

Scientific conference (2007, June)

Detailed reference viewed: 8 (0 ULg)