Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
See detailHow bright is the Io UV footprint?
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg et al

Conference (2010)

The electro-magnetic interaction between Io and the Jovian magnetosphere generates a perturbation in the magnetospheric plasma which propagates along the magnetic field lines and creates auroral footprint ... [more ▼]

The electro-magnetic interaction between Io and the Jovian magnetosphere generates a perturbation in the magnetospheric plasma which propagates along the magnetic field lines and creates auroral footprint emissions in both hemispheres. Recent results showed that this footprint is formed of several spots and an extended tail. Each feature is suggested to correspond to a different step in the propagation of the perturbation and in the electron energization processes. The present study focuses on the variations of the spots' brightness at different timescales from minutes to years through the rotation period of Jupiter. It relies on FUV images acquired with the STIS and ACS instruments onboard the Hubble Space Telescope. Since the footprint is composed of several localized features, a good understanding of the emission region geometry is critical to derive the actual vertical brightness and thus the precipitated energy flux. We developed a 3D emission model in order to assess as precisely as possible the respective contribution of each individual feature and to correctly estimate the precipitating energy flux. As far as the brightness variations on timescales of minutes are concerned, we will present results from the high time resolution campaign executed during summer 2009. On timescale of several hours, we will show that the variation of the emitted power as a function of the location of Io in the plasma torus suggests that the Jovian surface magnetic field strength is an important controlling parameter. Finally, the measured precipitated power and particle fluxes will be discussed in comparison with recent simulations considering both Alfvén waves filamentation and electron acceleration when the Alfvén waves become inertial. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
See detailHow can cobalt complexes help synthetic polymer chemists?
Debuigne, Antoine ULg; Jérôme, Robert ULg; Jérôme, Christine ULg et al

Conference (2009, March 19)

Nowadays, progresses in medicine, biotechnology, microelectronic and many other fields are more and more sustained by the development of novel polymer materials with constantly improved properties and ... [more ▼]

Nowadays, progresses in medicine, biotechnology, microelectronic and many other fields are more and more sustained by the development of novel polymer materials with constantly improved properties and well-defined molecular parameters. In this context, we designed a controlled radical polymerization (CRP) technique based on cobalt complexes which is able to efficiently control the radical polymerization of challenging monomers such as vinyl acetate (VAc), N-vinyl pyrrolidone (NVP) and acrylonitrile (AN). This so-called Cobalt-Mediated Radical Polymerization (CMRP) also gave access to unique diblock copolymers by sequential polymerization of the above mentioned monomers. However, addition of isoprene to polymer chains preformed by CMRP did not lead to the expected poly(isoprene) containing copolymers. Instead, the quantitative coupling reaction of the polymer chains was observed, as assessed by the perfect doubling of the molar mass of the initial macromolecules. This result is very exciting because this so-called Isoprene-Assisted Radical Coupling (I-ARC) reaction is not limited to polymers with low molar masses and homopolymers, contrary to the existing radical chains coupling methods. Indeed, when applied to diblock copolymers, IARC constitutes a straightforward approach for the synthesis of telechelic symmetrical ABA triblock copolymers and is thus a very promising tool for macromolecular engineering. [less ▲]

Detailed reference viewed: 40 (5 ULg)
Peer Reviewed
See detailHow can intermodal transport support the logistical strategies of enterprises: a study on the opportunities and bottlenecks
Marchal, Jean ULg; Macharis, C.; Lundoluka, F. et al

in How can intermodal transport support the logistical strategies of enterprises: a study on the opportunities and bottlenecks (2004)

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailHow can intermodal transport support the logistical strategies of enterprises: a study on the opportunities and bottlenecks
Marchal, Jean ULg; Macharis, Cathy; Vereecken, Laetitia

(2004)

Intermodal freight transport is the movement of goods in one and the same load unit or vehicle by successive modes of transport without handling of the goods themselves when changing modes (European ... [more ▼]

Intermodal freight transport is the movement of goods in one and the same load unit or vehicle by successive modes of transport without handling of the goods themselves when changing modes (European Conference of Ministers of Transport et al. 1997). Altough it has still a small market share compared to road transport, it becomes more and more apparant that intermodal transport transport will play an important role in the future. Intermodal transport is more environmental friendly than road transport (Kreutzberger et al., 2003) and has a positive effect on the congestion problems (Van Schijndel and Dinwoodie, 2000). A third and important positive feature of intermodal transport is that it can easily fit in the supply chain management efforts by the companies. In this paper the missing links and opportunities for the intermodal transportsector are analysed. Also solutions for overcoming these bottlenecks are proposed. [less ▲]

Detailed reference viewed: 45 (1 ULg)
Full Text
See detailHow can large scale integrated surface - subsurface hydrological model be used to evaluate long term climate change impact on groundwater reserves
Goderniaux, Pascal ULg; Brouyère, Serge ULg; Fowler, Hayley J. et al

in Proceeding of the 7th international conference on calibration and reliability in groundwater modeling (2009, September)

Detailed reference viewed: 87 (36 ULg)
Full Text
Peer Reviewed
See detailHow can long-term experimental plots can help us to understand the sustainability of different phosphorus inputs ?
Renneson, Malorie ULg; Dufey, Joseph; Roisin, Christian et al

Poster (2013, September)

Detailed reference viewed: 23 (5 ULg)
Full Text
See detailHow can organic farming contribute to sustainable production and consumption patterns
Stassart, Pierre M ULg; Mormont, Marc ULg; Jamar, Daniel et al

Report (2007)

A sustainable agricultural production chain (“from stable to table”) is not produced ex nihilo, especially when its future hinges on demand from a supermarket distribution circuit. Many of the standards ... [more ▼]

A sustainable agricultural production chain (“from stable to table”) is not produced ex nihilo, especially when its future hinges on demand from a supermarket distribution circuit. Many of the standards of conventional production chains effectively serve as references for intermediaries and consumers alike. The tensions between sustainability standards and market standards are thus the crucial areas in which negotiations about the chain’s future take place. These inextricably intertwined technical, social, and economic tensions are the subject of this research. These tensions create a situation of uncertainty, that is to say, of choices between pathways. They are both a springboard for action and the cause of inaction, depending on how they are interpreted. This exploration is what justified an intervention-research approach that combines restating questions and changing relations to explore the possible pathways to take [less ▲]

Detailed reference viewed: 30 (1 ULg)
Full Text
See detailHow can organic farming contribute to the sustainable production and consumption patterns ?
Mormont, Marc ULg

Report (2006)

A sustainable agricultural production chain (“from stable to table”) is not produced ex nihilo, especially when its future hinges on demand from a supermarket distribution circuit. Many of the standards ... [more ▼]

A sustainable agricultural production chain (“from stable to table”) is not produced ex nihilo, especially when its future hinges on demand from a supermarket distribution circuit. Many of the standards of conventional production chains effectively serve as references for intermediaries and consumers alike. The tensions between sustainability standards and market standards are thus the crucial areas in which negotiations about the chain’s future take place. These inextricably intertwined technical, social, and economic tensions are the subject of this research. These tensions create a situation of uncertainty, that is to say, of choices between pathways. They are both a springboard for action and the cause of inaction, depending on how they are interpreted. This exploration is what justified an intervention-research approach that combines restating questions and changing relations to explore the possible pathways to take. [less ▲]

Detailed reference viewed: 36 (1 ULg)
Full Text
Peer Reviewed
See detailHow can QbD be used and implemented to optimize method development and validation?
Lebrun, Pierre ULg; Boulanger, Bruno ULg; Hubert, Philippe ULg

Conference (2010, November 04)

Through an example, the way to apply Design of Experiments and the Bayesian modeling to develop robust optimal ligand-binding assays (LBA) will be presented. The objectives of a LBA will be re-examined ... [more ▼]

Through an example, the way to apply Design of Experiments and the Bayesian modeling to develop robust optimal ligand-binding assays (LBA) will be presented. The objectives of a LBA will be re-examined and response of interest derived (precision profile). The concept of Design Space specific for LBA will be introduced in relation with validation, routine and transfer [less ▲]

Detailed reference viewed: 56 (12 ULg)
Peer Reviewed
See detailHow can we predict difficulty in PISA reading items ? The process of describing item difficulty
Lumley, T.; Mendelovits, J.; Searle, D. et al

Conference (2009, September)

Detailed reference viewed: 3 (2 ULg)
Peer Reviewed
See detailHow can we predict difficulty in PISA reading items ? The process of describing item difficulty
Alderson, C.; De Jong, J.; Kirsch, I. et al

Conference (2009, November)

Detailed reference viewed: 3 (0 ULg)
Full Text
Peer Reviewed
See detailHow CAPE tools can contribute to process sustainability
Kalitventzeff, Boris ULg; Heyen, Georges ULg; Closon, Hervé et al

in Journal of Cleaner Production (2004), 12(2), 117-124

The concern of the EFCE for sustainability. Four recent case studies to illustrate how CAPE tools contribute to process sustainability: (1) ultimate plant operation at Wacker-Chemie (DE), (2) development ... [more ▼]

The concern of the EFCE for sustainability. Four recent case studies to illustrate how CAPE tools contribute to process sustainability: (1) ultimate plant operation at Wacker-Chemie (DE), (2) development of a new sulphuric acid plant with Air Liquide (FR), (3) plant retrofit for CO2 abatement at Kemira (BE), (4) insertion of a new plant in an existing Solvay industrial site (Asia). (C) 2003 Published by Elsevier Ltd. [less ▲]

Detailed reference viewed: 128 (10 ULg)
Full Text
Peer Reviewed
See detailHow Climate Change Could Affect The Hydrology In Walloon Region ?
Bauwens, Alexandra ULg; Sohier, Catherine ULg; Degre, Aurore ULg

Poster (2010, April 22)

Research on climate change and its impacts on hydrology are increasingly important nowadays. AMICE project focuses on the adaptation of the Meuse to the impacts of climate change. On this study, we focus ... [more ▼]

Research on climate change and its impacts on hydrology are increasingly important nowadays. AMICE project focuses on the adaptation of the Meuse to the impacts of climate change. On this study, we focus on the Walloon tributaries of the Meuse river, and more specifically on the Vesdre and the Lesse sub-catchments. Climate change scenarios are outputs of the CCI-HYDR Perturbation Tool for time slice 2020-2050 and 2070-2100. This tool allows us to build climate change time series and to use it as input of our hydrological models. The most pessimistic and the most optimistic scenarios are selected. The hydrological model used is called EPICGrid and it is a physically based distributed model at catchment scale. EPICGrid used the perturbed meteorological data to provide hydrograms for the different scenarios and time slice for the Vesdre and the Lesse sub-catchments. It appears that for the Vesdre daily discharge with a return period of 100 years (Qd100) could varies between -3% and +27% when the mean annual 7-day Minimum flow with a return period of 50 years (MAM750) varies between -37% and +16% for 2070-2100. For the Lesse, Qd100 varies between -30% and +50% when MAM750 varies between -21% and +28% for 2070-2100. The broad range of discharge variations reflects the broad range of meteorological variation. These results will be used further in the AMICE project to build an adaptation strategy. [less ▲]

Detailed reference viewed: 58 (16 ULg)
Full Text
See detailHow clinical nutrition helps pets suffering from acute and chronic diseases- practical examples and prospects
Diez, Marianne ULg; Ricci, Rebecca

in TSAVA (Ed.) 17th FECAVA Eurocongress 6th TSAVA Congress Modern Veterinary Practices Congress Book (2011, September)

Detailed reference viewed: 16 (4 ULg)
Full Text
Peer Reviewed
See detailHow closely are Pericopsis elata (Fabaceae) patches linked to past human disturbances in South-Eastern Cameroon
Bourland, Nils ULg; Cerisier, François; Daïnou, Kasso ULg et al

Conference (2013, June 26)

Studies conducted in the Congo Basin forests concluded that soil parameters and large disturbances induced by human activities since 3000–2000 BP could be the main driver for the persistence of long lived ... [more ▼]

Studies conducted in the Congo Basin forests concluded that soil parameters and large disturbances induced by human activities since 3000–2000 BP could be the main driver for the persistence of long lived light-demanding tall tree species. Today most of the timber species belong to this group, among them Pericopsis elata (Fabaceae). Like many other light-demanding trees, this species suffers from important regeneration problems. While the conditions for its establishment must have been met in the past, they obviously have become unfavourable. Because of ongoing logging activities and a natural decline of its populations, this species is recorded in both the IUCN Red List and the CITES Appendix II listings. Our goal was to investigate the roles of both pedological and anthropogenic factors in the persistence of forest patches characterized by this clustered species. Soil surveys, botanical inventories and anthracological excavations were conducted in three different forest sites located in south-eastern Cameroon. P. elata patches (3.3-14.7 ha) were studied and compared to their close surroundings. No statistical differences were observed between the results of botanical inventories conducted inside and outside the patches (Morisita-Horn indices from 0.69-0.77). Soils only differed in Fe content, but otherwise no significant differences could be observed. Charcoal is widespread and abundant in study sites, mostly inside the patches. Charcoal radiocarbon dating (2,150-195 BP) was consistent with decoration techniques of archaeological materials that we discovered. The average age of P. elata individuals coincides with fire events that occurred in a region where fires rarely occur naturally. We present evidence of past anthropogenic disturbances (human settlement, slash-and-burn cultivation) in the Congolese mixed moist semi-evergreen forest in south-eastern Cameroon. We discuss the potential influence of our findings on the management of light-demanding tall trees populations in a context of logging activities. [less ▲]

Detailed reference viewed: 86 (20 ULg)
Full Text
Peer Reviewed
See detailHow compatible is perfect competition with transmission loss allocation methods?
Jing, Dai; Phulpin, Yannick; Rious, Vincent et al

in Proceedings of the 5th International Conference on the European Electricity Market (EEM-08) (2008)

This paper addresses the problem of transmission loss allocation in a power system where the generators, the demands and the system operator are independent. We suppose that the transmission losses are ... [more ▼]

This paper addresses the problem of transmission loss allocation in a power system where the generators, the demands and the system operator are independent. We suppose that the transmission losses are exclusively charged to the generators, which are willing to adopt a perfectly competitive behavior. In this context, their offers must reflect their production costs and their transmission loss costs, the latter being unknown beforehand and having to be predicted. We assume in this paper that the generators predict their loss costs from the past observations by using a weighted average of their past allocated costs. Under those assumptions, we simulate the market dynamics for different types of transmission loss allocation methods. The results show that the transmission loss allocation scheme can lead to a poorly efficient market in terms of social welfare. [less ▲]

Detailed reference viewed: 48 (6 ULg)