References of "Unpublished conference/Abstract"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailThe dual role of weather forecasts on changes in activity-travel behavior
Cools, Mario ULg; Creemers, Lieve; Janssens, Davy et al

Conference (2011)

In previous studies, conflicting results could be found regarding the impact of weather forecasts on travel decisions, e.g. Khattak and De Palma (1997) found no significant effect of acquiring forecasted ... [more ▼]

In previous studies, conflicting results could be found regarding the impact of weather forecasts on travel decisions, e.g. Khattak and De Palma (1997) found no significant effect of acquiring forecasted weather information on the probability of adapting mode and departure time, whereas the results reported by Hagens (2005), Niina (2009) and Kilpelainen and Summala (2007) indicated that weather forecast do play an important role. Therefore this paper investigates the changes in activity-travel behavior in response to weather forecasts. The data for this study is collected by means of a stated adaptation survey, which is both administered on the internet and via a traditional paper and pencil questionnaire. In total, 595 respondents completed the survey. To obtain an optimal correspondence between the true population and the sample weights are assigned to the observation. Results indicate that weather information plays a dual role. On the one hand people do alter their activity-travel behavior in response to weather information, albeit these changes are not as pronounced when compared to actual weather. On the other hand the extent (frequency and media type) to which people are exposed to these weather forecasts appears to play only a marginal role. This dual role weather information plays in this study appears to be supported by the conflicting international literature and therefore revealing the underlying psychological motivations to change one's activity-travel behavior is a key challenge for further research. [less ▲]

Detailed reference viewed: 20 (1 ULg)
See detailCubeSat Activities at the University of Liège
Denis, Amandine ULg; Pisane, Jonathan ULg; Verly, Jacques ULg et al

Conference (2011)

Detailed reference viewed: 24 (6 ULg)
Full Text
See detailNew insights on the role of root radial conductivity on the overall uptake dynamics
Lobet, Guillaume ULg; Javaux, M.; Couvreur, V. et al

Conference (2011)

Detailed reference viewed: 9 (1 ULg)
Full Text
See detailInorganic carbon in the Tana River Basin (Kenya): Distribution, composition and process rates
Van den Meersche, K.; Tamooh, F.; Meysman, F. et al

Conference (2011)

Detailed reference viewed: 11 (1 ULg)
See detailExtraktion in hochviskosen Systemen
Kröckel, J; Adinata, D; Pfennig, Andreas ULg

Conference (2011)

Peer Reviewed
See detailEffect of environmental factors on the interaction plant-pathogen-Bacillus amyloliquefaciens S499
Pertot, I.; Hosni, T.; Pedrotti, L. et al

Conference (2011)

Detailed reference viewed: 23 (5 ULg)
Full Text
See detailEvolution de la pauvreté au Vietnam : quelques réflexions
Mai, Lan Phuong ULg; Lebailly, Philippe ULg; Nguyen Mau, Dung

Conference (2011)

Detailed reference viewed: 29 (10 ULg)
Peer Reviewed
See detailThe Producerist Narrative in Right-wing Flanders
Jamin, Jérôme ULg

Conference (2011)

Detailed reference viewed: 18 (1 ULg)
Full Text
Peer Reviewed
See detailCation partitioning between minerals of the triphylite ± graftonite ± sarcopside association in granitic pegmatites
Roda-Robles, Encarnacion ULg; Galliski, Migule; Nizamoff, Jim et al

Conference (2011)

Detailed reference viewed: 22 (0 ULg)
Peer Reviewed
See detailOptimal multi-subject fMRI experiments
Maus, Bärbel ULg; van Breukelen, Gerard J P; Goebel, R et al

Conference (2011)

Functional magnetic resonance imaging is a neuroimaging method which is used to study the human brain and its functional areas. In multi-subject fMRI experiments, data from several subjects is collected ... [more ▼]

Functional magnetic resonance imaging is a neuroimaging method which is used to study the human brain and its functional areas. In multi-subject fMRI experiments, data from several subjects is collected while these subjects perform each the same task of interest, e.g., passive viewing of houses presented on a screen, in the scanner. In my talk optimal designs for multi-subject fMRI experiments with fixed experimental budget are considered. The optimal combination of number of subjects and fMRI scanner time/imaging time per subject will be studied. Analytical and numerical results based on a linear mixed effects model with uncorrelated and correlated errors will be presented for common parameters of fMRI experiments. It will be shown how the optimal number of subjects and optimal scanner [less ▲]

Detailed reference viewed: 10 (1 ULg)
See detailNonlinear Normal Modes: A Finite Element Approach
Renson, Ludovic ULg; Kerschen, Gaëtan ULg

Conference (2011)

Detailed reference viewed: 20 (1 ULg)
Peer Reviewed
See detailSecond harmonic generation as a tool to probe the interactions of peptides with membrane-mimicking interfacial monolayers
Benichou, Emmanuel; Duboisset, Julien; Matar, Gladys et al

Conference (2011)

Detailed reference viewed: 23 (2 ULg)
See detailCamel Trekking for non motile bacteria
Rigali, Sébastien ULg

Conference (2011)

Detailed reference viewed: 8 (4 ULg)
Peer Reviewed
See detailGalectin-9 splice variants in endothelial cells: identification of novel variants and functional characterization
Heusschen, Roy ULg; De Bree, Martijn; Griffioen, Arjan et al

Conference (2011)

Detailed reference viewed: 7 (0 ULg)
See detailHafting and its impact on projectile tecnology
Rots, Veerle ULg

Conference (2011)

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailElectro-assisted assembly of Aliphatic Thiol, Dithiol and Dithiocarboxylic Acid Monolayers on Polycrystalline Copper Substrates
Maho, Anthony ULg; Denayer, Jessica; Delhalle, Joseph et al

Conference (2011)

Detailed reference viewed: 5 (0 ULg)
Full Text
Peer Reviewed
See detailEpidemiology of the metabolic syndrome in Luxembourg findings from ORISCAV-LUX study
Alkerwi, A; Sauvageot, N; Donneau, Anne-Françoise ULg et al

Conference (2011)

Detailed reference viewed: 38 (9 ULg)
See detailL'idéalité du sens. Levinas interprète de Husserl
Boccaccini, Federico ULg

Conference (2011)

Detailed reference viewed: 22 (0 ULg)
Peer Reviewed
See detailNew method for photovoltaic solar cell physical parameters extraction
Aazou, Safae ULg; Ibral, A.; Assaid, M. et al

Conference (2011)

Photovoltaic energy is one of the most important renewable energies. This type of energy, unlike other energy sources, is clean, safe, and abundant. The photovoltaic solar energy is based on the ... [more ▼]

Photovoltaic energy is one of the most important renewable energies. This type of energy, unlike other energy sources, is clean, safe, and abundant. The photovoltaic solar energy is based on the conversion of sunlight into direct current by solar cells. In order to increase the efficiency of the photovoltaic conversion and for a better understanding of the solar cell behavior, an accurate knowledge of the cell physical parameters is required. In this work, the solar cell is considered as a generator and the one-diode equivalent circuit is retained. This electronic circuit modeling the solar cell contains a diode with its reverse saturation current and its ideality factor, parasitic series and shunt resistances and a photocurrent generator. In this paper, a new physical parameters extraction method is presented, for the first time to our knowledge, which is based on the current-voltage characteristics and on the analytical expression of the output voltage given in term of the Lambert W function. This method gives all the physical parameters without any approximation or introduction of initial values. To test the efficiency of the presented method, a comparative study with other extraction methods is done. The obtained results are in good agreement. [less ▲]

Detailed reference viewed: 489 (69 ULg)
See detailComa et état végétatif
Vanhaudenhuyse, Audrey ULg

Conference (2011)

Detailed reference viewed: 20 (2 ULg)
Full Text
Peer Reviewed
See detailAnalyse des pigments des dessins pariétaux de la grotte Chauvet à Vallon-Pont-d'Arc
Laval, Eric; Salomon, Hélène ULg; Vignaud, Colette et al

Conference (2011)

Detailed reference viewed: 78 (3 ULg)
Full Text
See detailIntroduction à la théorie de la transition
Stassart, Pierre M ULg

Conference (2011)

Introductive conference for the 20 years of l'APERe on the transition theory.

Detailed reference viewed: 416 (6 ULg)
See detailExergetische Bewertung der Routen zur stofflichen Nutzung von Biomasse
Frenzel, Philipp; Fayyaz, Sara; Hillerbrand, Rafaela et al

Conference (2011)

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
See detailThe crystal chemistry of olivine-type phosphates
Hatert, Frédéric ULg; Ottolini, Luisa; Fontan, François et al

Conference (2011)

Detailed reference viewed: 12 (2 ULg)
Full Text
See detailConvergences citoyennes éoliennes: coopérations territoriale et transition
Stassart, Pierre M ULg

Conference (2011)

This oral communication develop the hypothese of territorial governance around windfarm participation and the citizen cooperatives

Detailed reference viewed: 42 (12 ULg)
Full Text
Peer Reviewed
See detailN-type and p-type ultra shallow junctions by atomic layer epitaxy and laser anneal
Nguyen, Ngoc Duy ULg; Souriau, Laurent; Shimizu, Yasuo et al

Conference (2011)

Detailed reference viewed: 58 (3 ULg)
See detailMicrobial Diversity and Processes in Lake Kivu (East Africa)
Llirós, M.; Darchambeau, François ULg; Garcia-Armisen, T. et al

Conference (2011)

Lake Kivu is a deep meromictic and oligotrophic tropical African lake with a permanent thermal- and haline stratification with huge accumulations of dissolved CO2 and CH4 (ca. 300 km3 and 60 km3 ... [more ▼]

Lake Kivu is a deep meromictic and oligotrophic tropical African lake with a permanent thermal- and haline stratification with huge accumulations of dissolved CO2 and CH4 (ca. 300 km3 and 60 km3, respectively) in the deep anoxic monimolimnion (from 60 o 480 m depth). Although there are a wealth of information on the ecology of small eukaryotes and their trophic role on Kivu, available information on prokaryotic planktonic assemblages is scarce. Molecular analysis of archaeal and bacterial communities showed a vertical segregation imposed by the permanent redoxcline. In relation to Bacteria, Actinobacteria, Betaproteobacteria, Green Sulfur Bacteria and Bacteroidetes were the most commonly retrieved groups. For Archaea, a marked dominance of Thaumarchaeota and Crenarchaeota (75% of all archaeal OTUs) over Euryarchaeota was observed. In the anoxic hypolimnion, Euryarchaoeta (Methanosarcinales and Methanocellales) lineages together with Miscellaneous Crenarchaeotic Group phylotypes were mainly recovered. In turn, Thaumarchaeota phylotypes were recovered in oxic and suboxic waters. CARDFISH analyses over the first 100 m revealed the dominance of Bacteria (51.4% – 95.7% of DAPI-stained cells), especially Actinobacteria (epilimnion), Betaproteobacteria (oxic-anoxic interface) and Bacteroidetes (upper hypolimnion), over Archaea (1.0% – 4.5%; maximum abundances at the oxic-anoxic interface). In turn, flow cytometry evidenced the dominance of HNA cells in the euphotic layer, whereas the proportion of LNA cells increased with depth. HNA and LNA populations were still observed in the anoxic hypolimnion suggesting facultative or strict anaerobic metabolisms. The detection of distinct depth maxima of nitrate, nitrite, archaeal amoA and Marine Thaumarchaeota 16S gene copy numbers together with regularly detection of deep maxima of 3H-Thymidine uptake, and the presence of low-light adapted GSB species point towards a strong link of N, C, and S cycles in the redoxcline of Lake Kivu. [less ▲]

Detailed reference viewed: 67 (2 ULg)
See detailExergetische Bewertung neuer Syntheserouten ausgehend von biobasierten Rohstoffen
Fayyaz, Sara; Frenzel, Philipp; Hillerbrand, Rafaela et al

Conference (2011)

Full Text
See detailActivités spontanées en ENMG
WANG, François-Charles ULg

Conference (2011)

Detailed reference viewed: 10 (0 ULg)
See detailHow to measure GFR in the year 2011?
DELANAYE, Pierre ULg

Conference (2011)

Detailed reference viewed: 2 (0 ULg)
Full Text
See detailCatalytic conversion of lignin to low molecular weight compounds
Verziu, Marian; Richel, Aurore ULg; Filip, Petru et al

Conference (2011)

Nowadays lignocellulosic materials represent the higher renewable natural resource in the world. These materials consist of 34–50% cellulose, 19–34% hemicellulose and 11–30% lignin. Unlike cellulose ... [more ▼]

Nowadays lignocellulosic materials represent the higher renewable natural resource in the world. These materials consist of 34–50% cellulose, 19–34% hemicellulose and 11–30% lignin. Unlike cellulose, lignin is a three-dimensional aromatic polymer including three main phenylpropane units, namely p-coumaril, coniferyl and sinapyl alcohol which are linked by C-O-C or C-C bonds. To valorize this material it is necessary to achieve its depolymerization to monomers or dimers that typically results from the cleavage of β-O-4 linkages. Literature already reported several approaches to depolymerize lignin using both homogeneous and heterogeneous catalysts. Yuan et all have considered a homogeneous route in this scope using NaOH as catalyst. This solution is however by far non-green leading to no-recyclable wastes. Heterogeneous catalysts offer an alternative. The use of noble metals like Pt or Rh supported on carbon, at 473 K, under H2 pressure, was shown to yield over 50% in monomers and dimers . Cheaper metals as copper represent a more versatile route but the reported example uses high energetic supercritical conditions. The use of inexpensive metals such as Ni may offer another alternative. In this study we propose an inexpensive route presenting results obtained using as active species, nickel in different environments such as NiOx, (NiAl)Ox, (NiMgAl)Ox thus looking also for the effect of basicity in this reaction. These materials were prepared using specific protocols and characterized by several techniques like: XRD, DRIFT, BET, and TEM. The catalysts were tested in autoclave conditions at different temperature (423-473K) under H2 pressure. The lignin was extracted from Miscanthus plants into formic acid / acetic acid / water mixture. Since it is not soluble in water its solubilization was achieved in an [BMIM]OAc ionic liquid, selected from a screening of a series of ILs. On the other side, the analysis of the reaction products is a complicate issue in this chemistry. This was carried out with a chromatographic system equipped with a Detector Triple Quad LC/MS, and a MS Ion Source type, working simultaneously in both APCI and ESI modes. The analysis of the reaction products indicated both polar and less polar compounds with a m/z signal varying from 80 till 900. The population of the different class molecules was carefully analyzed as a function of the nature of the catalyst and the reaction conditions. The higher extent of lignin depolymerization was around 54% and was obtained using a (NiAl)Ox catalyst. Under these conditions the predominant class was that with m/z of 200-300 a.u. Finally the stability of the catalysts was checked looking for their separation and recyclability in several successive cycles. [less ▲]

Detailed reference viewed: 246 (16 ULg)
Full Text
See detailProduction and processing of canna vermicelli in Hung Yen province toward sustainable development
Le Thi Long, Vy; Do Truong, Lam; Vu Dinh, Ton et al

Conference (2011)

Located in the Red River Delta region, Hung Yen province has 923000 ha of total land area, of which agricultural land area occupied 60.67%. The agricultural land area per labor is 0.1 ha. However, it has ... [more ▼]

Located in the Red River Delta region, Hung Yen province has 923000 ha of total land area, of which agricultural land area occupied 60.67%. The agricultural land area per labor is 0.1 ha. However, it has been annually decreasing due to the development of industrial zone, construction of urban zone, expansion of road… For these reasons, the stainable development for production and processing of agricultural products plays a very important role in job creation for farmers who loosed their own agricultural land, avoidance of quantity and quality loosing of raw agricultural products and increase in economic efficiency of agricultural production and processing. The production and processing of canna are traditional jobs of rural households in Hung Yen. They not only have been creating jobs for rural households but also increasing in their income. Beside the social and economic benefit created by these activities, the processing activity has caused many negative consequences. It led to environmental pollution due to its waste, overuse of chemical substances. Desiccated of vermicelli in bad condition resulted in the unsafe food. Therefore, this study is conducted to deeply investigate both positive effects and negative consequences created by production and processing of canna vermicelli in term of economic, social and environmental aspects. This study concentrates on the farm households; discuss advantages and disadvantages of production inputs, processing techniques and output market of their products from arrowroot to vermicelli; and find out solutions for the sustainable development for production and processing of vermicelli. [less ▲]

Detailed reference viewed: 59 (6 ULg)
Full Text
Peer Reviewed
See detailIs brain activity during a Stroop inhibitory task modulated by the kind of cognitive control required?
Collette, Fabienne ULg; D'Ostilio, Kevin ULg; D'Argembeau, Arnaud ULg et al

Conference (2011)

Performance on the Stroop task is associated to a large antero-posterior cerebral network involving notably the anterior cingulate and dorsolateral prefrontal cortex. In this study, we used a mixed-BOLD ... [more ▼]

Performance on the Stroop task is associated to a large antero-posterior cerebral network involving notably the anterior cingulate and dorsolateral prefrontal cortex. In this study, we used a mixed-BOLD-fMRI design (N=25) to determine the neural substrates of inhibitory functioning in a Stroop task according to contextual information. Consequently, two task-contexts were created: (1) congruent context with a majority of facilitator items, (2) non-congruent context with mainly interfering items. Based on the dual cognitive control model, we postulated that the non-congruent blocks will involve proactive control, which is anticipatory, sustained, and involved when a large number of interfering items are successively presented. On the contrary, congruent blocks were assumed to involve reactive control, which occurs when few interfering items are presented, and just after the presentation of these items only. On this basis, we hypothesized that the kind of cognitive control modulates cerebral activity associated to inhibitory functioning. For behavioral data, we obtained faster response times for interfering items in the non-congruent vs. congruent condition, indicating proactive control specific to the congruent condition only. Functional neuro-imaging data showed an increased transient activity for interfering vs neutral items in a fronto-parietal network more important in the congruent than in the neutral condition. A similar contrast in the non-congruent condition showed no significant brain activity at the statistical threshold used. These data indicate the existence of a modulation of the cerebral areas associated to inhibitory functioning according to the kind of cognitive control necessary to perform the task. [less ▲]

Detailed reference viewed: 105 (4 ULg)
See detailDiscovery and characterization of an ozone layer in Venus’atmosphere
Montmessin, F.; Bertaux, J.-L.; Lefèvre, F. et al

Conference (2011)

Detailed reference viewed: 12 (0 ULg)
Full Text
See detailPeasant responses to agricultural land conversion and mechanism of rural social differentiation in Hung Yen province, Northern Vietnam
Nguyen Thi, Dien; Vu Dinh, Ton; Lebailly, Philippe ULg

Conference (2011)

Agricultural accumulation has been one of the main source determined the social differentiation in Vietnamese countryside. The complexities of agrarian changes under the post - socialist industrialization ... [more ▼]

Agricultural accumulation has been one of the main source determined the social differentiation in Vietnamese countryside. The complexities of agrarian changes under the post - socialist industrialization with high rate of agricultural land conversion in recent context reveal the new forms of capital accumulation and social differentiation. This research investigates how land conversion process to industrial zones and clusters affected to the way that different groups of peasant households accumulate their resources. The study was carried out in 3 districts of Hung Yen province from 2006 to 2010. The study results are as follows: first, the land conversion to industrialization has impact on not only the decline of household landholdings but also the changes value of land which are the sources of social conflicts and informal land transfer. Second, in the context of land conversion to industrialization with tiny plots of land, low return from agricultural production and more opportunities of non-farm activities, even when non-farm employment is very profitable, peasant households are not likely to give up their land but maintaining agricultural production for not only their basic and secure livelihood but also for their identity. Third, among the affected peasant groups, the households with non-farm background tend to be in better position in engaging to high - earning activities. They are likely the rich peasants in opposed to the poor group with farming background and lost more than 50% of their agricultural land. This research has showed that the industrialization policies have to deal with the proportion of agricultural land would be transferred for industrialization zones and other measures in order to limit the conflicts as well as the social differentiation in countryside. [less ▲]

Detailed reference viewed: 88 (7 ULg)
See detailThermal model reduction using the super-face concept
Masset, Luc ULg; Bruls, Olivier ULg; Kerschen, Gaëtan ULg

Conference (2011)

The objective of this presentation is to carry out thermal model reduction in the context of the finite element method. The finite element model is decomposed in several sets of adjacent faces called ... [more ▼]

The objective of this presentation is to carry out thermal model reduction in the context of the finite element method. The finite element model is decomposed in several sets of adjacent faces called super-faces. Specialized algorithms such as the METIS partitioning algorithm are used to automatically generate the super-faces. Several constraints may be imposed, e.g., the size of the super-face, its aspect ratio or its aperture angle. Once the model is decomposed, view factors between super-faces are calculated with direct numerical integration or ray-tracing methods. This method offers a very substantial reduction of the computational burden compared to the full model, which is particularly interesting for pre-design studies or specific applications such as deployable structures. [less ▲]

Detailed reference viewed: 41 (14 ULg)
Full Text
See detailEvolution of livelihood strategy and income of the households in the coastal sandy area of the Central region, Vietnam : the case of Thua Thien Hue Province during period 2003-2008
Nguyen Dang, Hao; Lebailly, Philippe ULg

Conference (2011)

Based on livelihood approach and using both livelihood strategy participatory assessment and household survey data this study mainly focus on assessment of evolution of livelihood strategy and income of ... [more ▼]

Based on livelihood approach and using both livelihood strategy participatory assessment and household survey data this study mainly focus on assessment of evolution of livelihood strategy and income of households in the Coastal Sandy Zone of Thua Thien Hue Province. Findings indicated that livelihood strategies are very dynamic and considerable difference between the wealth categories of households and among the study sites. Although agriculture –based strategy is one of the most popular among the livelihood strategies there are considerable changes. Thanks to more specialization on livestock - non-farm business – aquaculture the better-off category has increased rapidly their income during 2003-2008 period. By contrast, due to more dependence on food crop, wage work and migration, income of the poor slowly improved at the same period. These findings implicate that in the context of rural development, support policies introduced by government have positively influenced on household income, but these general policies cannot meet the development needs from various locations as well as different household categories because there is marked difference in livelihood assets, human source, landholding, financial and social capitals in particular. [less ▲]

Detailed reference viewed: 46 (6 ULg)
Full Text
Peer Reviewed
See detailSocial policy Challenges in Belgium
Jousten, Alain ULg

Conference (2011)

Detailed reference viewed: 19 (4 ULg)
Full Text
See detailFigures épistémologiques de la fragmentation
Badir, Sémir ULg

Conference (2011)

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailSuper-heated Steam Drying: an Innovation of Clean Coal Technology for Lignite-fired Power Plant
Li, Sheng; Jiang, Bing; Shi, Yongchun et al

Conference (2011)

A comprehensive overview of the status of lignite pre-drying technology is given in this study. The practical problems of high energy consumption, high investment and poor safety exist in the lignite ... [more ▼]

A comprehensive overview of the status of lignite pre-drying technology is given in this study. The practical problems of high energy consumption, high investment and poor safety exist in the lignite drying using the traditional thermal drying, for the reason that the super-heated steam drying technology for lignite is put forward. The mechanism experiment research and pilot-scale test research of the super-heated steam drying technology for lignite were carried out, and the results show that the drying efficiency of the super-heated steam is better than the hot air at given conditions, the lignite drying can be accomplished stably and continuously and the drying product can meet the requirement of the industrial application of the lignite fired power plant. A more innovative approach as a new lignite Super-heated steam low-rank Coal Upgrading (SCU) is proposed by Energy Conservation Research Center of Shandong Academy of Sciences. The technical advancement in terms of energy-saving and safety among the applied technogies are compared and analyzed, and the results show this techonogy has the advantages of low energy consumption, high safety and energy saving. To sum up, the exploitation of the super-heated steam drying technology for lignite fired power plant can promote the development of the energy and power industry, and the technology has wide application prospect. [less ▲]

Detailed reference viewed: 76 (2 ULg)
Peer Reviewed
See detailActualités en droit des contrats
Kohl, Benoît ULg

Conference (2011)

Detailed reference viewed: 8 (1 ULg)
Peer Reviewed
See detailMolecular phylogeography of the common dormouse, Muscardinus avellanarius
Mouton, Alice ULg; Grill, Andrea; Sarà, Maurizio et al

Conference (2011)

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailLes festivals et la transformation du champ théâtral en Belgique
Delhalle, Nancy ULg

Conference (2011)

Detailed reference viewed: 59 (13 ULg)
Full Text
Peer Reviewed
See detailAvoiding congestion in freight transport planning: a case study in Flanders
Caris, An; Cools, Mario ULg; Debels, Dieter

Conference (2011)

A substantial increase in transport intensity for passenger and freight traffic has been observed during the last decades and research confirms that this trend will continue in the years to come. Economic ... [more ▼]

A substantial increase in transport intensity for passenger and freight traffic has been observed during the last decades and research confirms that this trend will continue in the years to come. Economic centres have turned into heavily congested areas. The freight transport sector incurs excessive waiting times on the road as well as at intermediate stops (e.g. sea terminals, loading or unloading points). This may cause economic losses and environmental damages. Waiting times may be avoided by taking into account congestion in freight transport planning. Vehicle routing problems arise when several pickup and delivery operations need to be performed, mainly by truck, over relatively short distances [1]. Congestion leads to uncertain travel times on links and uncertain waiting times at pickup or delivery locations. Peak hours may be avoided on congested road segments by changing the order in which customers are served. On the other hand, time slots at customer sites may be renegotiated, creating more flexibility to avoid congestion on the road and at customer stops. The objective of this paper is to estimate the benefits of taking congestion into account in transport planning and to quantify the impact of delivery restrictions on transport costs. A highly congested road network raises the need for robust vehicle routing decisions. Current traffic conditions give rise to uncertain travel times. The reliability of travel time on a route is one of the dominant factors affecting route and departure time choices in passenger transport [2]. Similarly, in freight transport the reliability of travel times may be taken into account when planning vehicle routes. In this paper congestion is modelled as time-dependent travel times. These travel times take into account the dynamics of the time lost due to congestion using the Bureau of Public Roads (BPR) function, which is commonly-used for relating travel times to increases in travel volume [3]. The Time Dependent Vehicle Routing Problem (TDVRP) will be studied as a deterministic planning problem taking into account peak hour traffic congestion. Solution methods for the TDVRP have been focused on heuristic approaches [4, 5, 6, 7]. Kok [8] applies a restricted dynamic programming heuristic to solve a TDVRP. In this paper a heuristic algorithm will be presented to solve problem instances of realistic size. Next, this algorithm will be applied to perform a sensitivity analysis to identify which congestion avoiding strategies have a large influence on the objective function. Shippers may adapt the way they plan their transport as a strategy to avoid congestion. For example, time windows at customer locations may be renegotiated, departure times at the depot may be questioned or the assignment of customers to routes and the order in which customers are served may be changed. The proposed methodology will be demonstrated with a Flemish case study. [less ▲]

Detailed reference viewed: 38 (0 ULg)
Full Text
See detailExploring the nucleon structure through GPDs and TDAs in hard exclusive processes
Pire, Bernard; Semenov-Tyan-Shanskiy, Kirill ULg; Szymanowski, Lech et al

Conference (2011)

Detailed reference viewed: 18 (0 ULg)
See detailLC-MS for metabolomics
Fillet, Marianne ULg

Conference (2011)

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailConvergent evolution for sound production with a putative slow muscle in a Perciform fish Glaucosoma buergeri (Glaucosomatidae)
Fine, Michael; Mok, Hin-Kiu; Tsai, Kai-En et al

Conference (2011)

Detailed reference viewed: 8 (2 ULg)
See detailImplant dans le secteur esthétique: choix du timing et de la technique chirurgicale
LAMBERT, France ULg

Conference (2011)

Les résultats esthétiques en implantologie sont déterminés par une harmonie tissulaire et prothétique. Plusieurs techniques chirurgicales sont décrites et le choix de celle-ci est déterminant pour obtenir ... [more ▼]

Les résultats esthétiques en implantologie sont déterminés par une harmonie tissulaire et prothétique. Plusieurs techniques chirurgicales sont décrites et le choix de celle-ci est déterminant pour obtenir un résultat esthétique optimal. Cet exposé décrit des techniques chirurgicales telles que: extraction/implantation immédiate, gestion d'alvéoles ou encore régénération osseuse. L'objectif est, à partir d'une situation clinique initiale, de déterminer le choix de la technique idéale ainsi que le timing chirurgical . [less ▲]

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailEtude d'art mobilier en laboratoire par des techniques non destructives : analyse par faisceau d'ions et micro-diffraction pour caractériser les pigments préhistoriques et identifier leurs origines. Exemples de l'abri Pataud (Dordogne) et d'Arcy- sur-Cure (Yonne)
Beck, Lucile; Grégoire, Sylvain; Lebon, Matthieu et al

Conference (2011)

Les pigments préhistoriques sont formés à partir de composés naturels tels les d’oxydes de fer ou les oxydes de manganèse. Ils ont été collectés par les hommes préhistoriques dans leur environnement ... [more ▼]

Les pigments préhistoriques sont formés à partir de composés naturels tels les d’oxydes de fer ou les oxydes de manganèse. Ils ont été collectés par les hommes préhistoriques dans leur environnement proche ou parfois à de grandes distances. Connaître leur provenance géographique, ou à défaut établir des relations entre matière première retrouvée en fouille et objets archéologiques décorés, pourraient permettre de retracer la mobilité des populations et d’appréhender les choix techniques opérés ou la mise en place des décors.Ces relations et provenances peuvent être établies à partir de la composition chimique des matériaux employés. Il a été notamment démontré, que pour les obsidiennes ou les minéraux précieux tels les grenats ou les rubis, la nature et la concentration des éléments traces sont caractéristiques des milieux géologiques dans lesquels ils ont été formés. Dans le cadre de Madapca, la même démarche a été appliquée aux pigments préhistoriques. Elle s’appuie principalement sur la méthode d’analyse non destructive PIXE (Particule Induced X-ray Emission) et a été développée pour des pigments provenant des sites d’Arcy sur Cure (Châtelperronien, 32 000 BP) et de l’Abri Pataud (niveau Proto-Magdalénien, 22 000 BP). L’analyse élémentaire des éléments majeurs, mineurs et traces a permis de mettre en évidence des groupes de pigments de composition distincte au sein des niveaux archéologiques étudiés, et donc l’utilisation de sources de matière premières différentes. Dans le cas de l’Abri Pataud (Dordogne), il a été possible d’établir des correspondances entre la composition chimique des blocs de matière première composés d’oxydes de fer et celle des décors peints sur des éléments mobiliers ou sur les écailles ornées provenant de l’effondrement du plafond de l’abri. Dans le cas d’Arcy-sur-Cure (Yonne), nous avons pu montrer que la teneur en éléments traces variaient en fonction de la provenance des blocs de pigments rouges et noirs, trouvés en nombre dans la grotte du Renne. Cette étude démontre l’intérêt des techniques de spectrométrie X pour la différentiation des matériaux colorants utilisés en contexte préhistorique. [less ▲]

Detailed reference viewed: 41 (2 ULg)
See detailInfluence of solvent flow-rate and flow-direction on plant-material extraction
Bol, J B; Pfennig, Andreas ULg

Conference (2011)

Detailed reference viewed: 2 (0 ULg)
Peer Reviewed
See detailRelease and innate immune detection of host cell DNA mediate the adjuvant activity of aluminum salts
Marichal, Thomas ULg; Ohata, K; Bedoret, Denis et al

Conference (2011)

Detailed reference viewed: 12 (2 ULg)
Full Text
Peer Reviewed
See detailA coupled two-scale computational scheme for periodic quasi-brittle thin planar shell failure
Mercatoris, Benoît ULg; Massart, Thierry J.

Conference (2011)

Detailed reference viewed: 9 (0 ULg)
See detailOverview of CO2 dynamics within sea ice
Delille, Bruno ULg; Geilfus, Nicolas-Xavier ULg; Vancoppenolle, M. et al

Conference (2011)

Detailed reference viewed: 13 (5 ULg)
Peer Reviewed
See detailNegations at Medinet Habu
Gillen, Todd Jonathan ULg

Conference (2011)

Detailed reference viewed: 13 (3 ULg)