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See detailContributions to transnational flood risk management in the Meuse basin
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in European Symposium on Flood Frequency Estimation and Implications for Risk Management (2014, March)

Experience in transboundary river basins emphasizes the need for more cooperative transnational water management. In this respect, the Interreg IVB project AMICE aims at developing a shared adaptation ... [more ▼]

Experience in transboundary river basins emphasizes the need for more cooperative transnational water management. In this respect, the Interreg IVB project AMICE aims at developing a shared adaptation strategy of the basin of the river Meuse to the hydrological impacts of climate change. The basin covers parts of France, Belgium, Germany and the Netherlands. The project combines scientific research with innovative natural and structural water retention measures, as well as enhanced transnational crisis management. In this framework, common climate and hydrological scenarios were derived for the time horizons 2021-2050 and 2071-2100. A “coordinated” procedure was set up to conduct the first hydraulic modelling of the entire river Meuse, from its spring to its mouth. For the considered climate scenarios, the increases in future flood levels were found about twice higher in the central part of the Meuse basin compared to the upper and lower parts. This distinctive spatial pattern results from the morphology of the valley. The characteristics of the hydraulic models used for this “coordinated” analysis differed significantly from one region to the other (e.g., 1D vs. 2D, steady vs. unsteady). Therefore, a more refined analysis was undertaken on a 100 km long stretch of the Meuse, crossing the border between Belgium and the Netherlands, using very similar (“harmonized”) models for the whole computation (2D unsteady models). As a result, the influence of using different interconnected models could be appreciated. The results of hydraulic modelling were used to conduct damage assessment based on a common methodology throughout the Meuse basin and combined with landuse change scenarios in the floodplains (change in vulnerability of the floodplains). In turn, several adaptation measures were tested, including upstream water retention, dredging as well as upgrade of flood defences and mobile weirs. Hydrological and hydraulic modelling was also performed for a sub-basin of the river Meuse, partly controlled by two large reservoirs. A detailed model of the operation rules of these reservoirs was implemented. This enabled to investigate the impact of the considered climate change scenarios on the performance of these multi-purpose reservoirs as well as to investigate possible enhancements in the operation rules, which may serve as adaptation measures to compensate for the detrimental effects of climate change. [less ▲]

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See detailIl contributo della ricerca: i primi dati e le prospettive per la pratica
De Palo, Francesca; Sala, Alessia; Miscioscia, Marina ULg

Conference (2011, February 25)

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See detailContributor to Small Animal Ophthalmology, 4th Edition - A Problem-Oriented Approach (DVD)
Monclin, Sébastien ULg

in R.L. Peiffer; S.M. Petersen-Jones (Eds.) Small Animal Ophthalmology, 4th Edition - A Problem-Oriented Approach (2009)

Detailed reference viewed: 13 (1 ULg)
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See detailContributor to the Wonca Dictionary of General/Family Practice
Jamoulle, Marc ULg

in Bentzen, Niels (Ed.) Wonca Dictionary of General/Family Practice (2003)

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See detailContro la pastasciutta : Marinetti’s Futurist Lunch
Delville, Michel ULg

in Intervalles (2007), 2

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See detailControl and simulation of doubly fed induction generator for variable speed wind turbine systems based on an integrated finite element approach
Chen, Qiongzhong ULg; Defourny, Michel; Bruls, Olivier ULg

in Proceedings of the European Wind Energy Conference and Exhibition 2011 (EWEA 2011) (2011, March)

Regarding renewable energy and environment- friendly issues, wind energy nowadays has become the fastest-growing energy source in the world, and thus attracts a lot of research interest in the wind ... [more ▼]

Regarding renewable energy and environment- friendly issues, wind energy nowadays has become the fastest-growing energy source in the world, and thus attracts a lot of research interest in the wind turbine generation system. A doubly fed induction generator (DFIG) is used for variable speed operation in a wind turbine system to extract more power. Following a systematic approach, this paper investigates on the modelling and simulation of wind turbine generating systems using the flexible multibody simulation software SAMCEF/MECANO [1]. The objective of this work is to analyze the control-generator-structure interactions in a wind turbine system. Firstly, an extension of the finite element method is integrated into the flexible multibody dynamics solver, and thus extends the solver to represent mechatronic systems in a strongly-coupled way. Secondly, DFIG and the control systems are modularly modeled for the wind turbine package. Control of DFIG for grid synchronization and power optimization are elaborated in detail, and the methods are validated through a 2MW DFIG wind turbine prototype model. At the end, a systematic system model of wind turbine structure connected with the DFIG generating system is presented, which provides the dynamic analysis for the whole system in an overall range. [less ▲]

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See detailControl and Voting Power in Complex Shareholding Networks
Crama, Yves ULg; Leruth, Luc ULg; Su Wang

Conference (2011, June)

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See detailControl and voting power in corporate networks: Concepts and computational aspects
Crama, Yves ULg; Leruth, Luc ULg

in European Journal of Operational Research (2007), 178(3), 879-893

This paper proposes to rely on power indices to measure the amount of control held by individual shareholders in corporate networks. The value of the indices is determined by a complex voting game viewed ... [more ▼]

This paper proposes to rely on power indices to measure the amount of control held by individual shareholders in corporate networks. The value of the indices is determined by a complex voting game viewed as the composition of interlocked weighted majority games; the compound game reflects the structure of shareholdings. The paper describes an integrated algorithmic approach which allows to deal efficiently with the complexity of computing power indices in shareholding networks, irrespective of their size or structure. In particular, the approach explicitly accounts for the presence of float and of cyclic shareholding relationships. It has been successfully applied to the analysis of real-world financial networks. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

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See detailControl and Voting Power in Shareholding Networks
Crama, Yves ULg

Conference (2010, March 18)

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See detailControl Charts monitoring product’s loss to society
Celano, Giovanni; Faraz, Alireza ULg; Saniga, Erwin

in Quality and Reliability Engineering International (2013)

Taguchi introduced a new philosophy in quality control that accounts for the economic loss associated to process variation measured by deviations from the target value of a product quality characteristic ... [more ▼]

Taguchi introduced a new philosophy in quality control that accounts for the economic loss associated to process variation measured by deviations from the target value of a product quality characteristic. The Taguchi loss function has been considered in the design of control charts only for the computation of costs associated with nonconformities. This paper considers sample statistics based on the Taguchi loss function as a means to implement Shewhart control charts monitoring both the deviation from the target and dispersion of normally distributed quality characteristics. The aim of this proposed control chart is to perform on-line quality control of a process by monitoring its quality loss cost performance over time. To compute the quality loss performance, we consider a nominal-the-best quality characteristic. The statistical performance of the proposed control charts has been evaluated and compared with that of widely used control charts. Implementing target costing philosophy by means of one of the proposed charts is also discussed. An example illustrates the Taguchi control chart in a practical implementation. [less ▲]

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See detailControl Engineering Challenges in Systems and Synthetic Biology
Bullinger, Eric ULg

Scientific conference (2010, March 19)

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See detailControl Engineering in Systems Biology
Bullinger, Eric ULg

Scientific conference (2004, July 08)

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See detailControl in a dissipative environment: the example of a Cope rearrangement
Chenel, Aurélie; Dive, Georges ULg; Meier, Christopher et al

in Journal of Physical Chemistry A (2012), 116

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See detailControl in Biological Systems - from Intercellular Signalling to the Organism
Bullinger, Eric ULg

Scientific conference (2011, September 16)

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See detailControl in Biological Systems - from Intercellular Signalling to the Organism
Bullinger, Eric ULg

Scientific conference (2010, April 28)

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See detailControl of Allergen-Induced Inflammation and Hyperresponsiveness by the Metalloproteinase ADAMTS-12
Paulissen, Geneviève ULg; El Hour, Mehdi; Rocks, Natacha ULg et al

in Journal of Immunology (2012), 189

A disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) constitute a family of endopeptidases related to matrix metalloproteinases. These proteinases have been largely implicated in tissue ... [more ▼]

A disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) constitute a family of endopeptidases related to matrix metalloproteinases. These proteinases have been largely implicated in tissue remodeling associated with pathological processes. Among them, ADAMTS12 was identified as an asthma-associated gene in a human genome screening program. However, its functional implication in asthma is not yet documented. The present study aims at investigating potential ADAMTS-12 functions in experimental models of allergic airways disease. Two different in vivo protocols of allergen-induced airways disease were applied to the recently generated Adamts12-deficient mice and corresponding wild-type mice. In this study, we provide evidence for a protective effect of ADAMTS-12 against bronchial inflammation and hyperresponsiveness. In the absence of Adamts12, challenge with different allergens (OVA and house dust mite) led to exacerbated eosinophilic inflammation in the bronchoalveolar lavage fluid and in lung tissue, along with airway dysfunction assessed by increased airway responsiveness following methacholine exposure. Furthermore, mast cell counts and ST2 receptor and IL-33 levels were higher in the lungs of allergen-challenged Adamts12-deficient mice. The present study provides, to our knowledge, the first experimental evidence for a contribution of ADAMTS-12 as a key mediator in airways disease, interfering with immunological processes leading to inflammation and airway hyperresponsiveness. [less ▲]

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See detailControl of apple blue mold by the antagonistic yeast pichia anomala strain K: screening of UV protectants for preharvest application
Lahlali, Rachid; Brostaux, Yves; Jijakli, Haissam ULg

in Plant Disease (2011), 95(3), 311-316

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See detailControl of attosecond electronic dynamics in molecules
Mignolet, Benoît ULg

Doctoral thesis (2014)

In the last decade, the development of ultrashort, attosecond and few-femtosecond laser pulses opened new avenues towards probing and controlling molecular electron dynamics, and thereby molecular ... [more ▼]

In the last decade, the development of ultrashort, attosecond and few-femtosecond laser pulses opened new avenues towards probing and controlling molecular electron dynamics, and thereby molecular reactivity. The aim of the thesis is to show by dynamical simulations that the purely electronic dynamics in molecules can be controlled and probed by ultrashort pulses. When an ultrashort pulse is used to excite a molecule, an electronic reorganization occurs before the onset of nuclear motion. In the first dozen of femtoseconds following the excitation, there is a timescale where the dynamics is purely electronic and where the nuclei can be considered as fixed. It is in this time windows that we showed that we can control the spatial localization of the electronic density by tuning the parameters of the pulse. It is important to control this density because at the end of the pulse, the electronic density is out equilibrium and it creates a force on the nuclei that is different from that which we would get from the Born Oppenheimer separation. So by controlling the electronic density, we could trigger a specific outcome of a chemical reaction or rearrangement, which would offer a new way to control chemical reactivity. This control is different from conventional photochemistry where the electrons are equilibrated with the instantaneous position of the nuclei. The research has been focused on the development of theories and methodologies for the description of the non-equilibrium electronic dynamics and its probing and on the applications to small and large molecules for the comparison with experimental results. The description of the dynamics induced by short and intense electric field requires the use a non perturbative method that takes into account the time profile of the strong electric field. We used a time-dependent multiconfigurational method where the time-dependent electronic wavefunction is expressed on a basis of the time-independent field free electronic states of the molecule. This method is particularly well fitted for the description of the electronic dynamics of large systems since it only requires the electronic structure of the field free excited states, which can be computed using quantum chemistry methods adapted to the size of the molecule. We integrate the time-dependent Schrödinger equation at a frozen nuclear geometry with an electronic Hamiltonian that is time-dependent and includes the effect of the electric field of the pulse. The field free electronic states of the molecule are coupled due to the dipole interaction induced by the strong field, which creates a non stationary coherent superposition of states with the electronic density localized in different regions of the molecule as a function of time. The control of the spatial localization of the electronic density can be obtained for aligned molecules by tailoring the parameters of the pulse, mainly the carrier frequency and the polarization. We demonstrated control in the LiH molecule and in a larger molecule, ABCU (C10H19N), a cage molecule composed of 86 electrons. The ultrafast electronic dynamics can be probed by a second pulse that photoionizes it. We showed that the molecular frame photoelectron angular distributions (MFPAD) can be used to probe the interferences between the states and that a given coherent superposition of states yields a unique MFPAD, which makes the ionization an ideal probe of the electronic dynamics. The computation of the MFPAD requires the evaluation of the dipole-coupling matrix element between a neutral state and an ionized state. We chose to express the ionized state as the antisymmetrized product of a cationic state and an orthogonal plane wave that describes the wavefunction of the ionized electron. The dipole-coupling matrix element is a n electron integral that can be reduced to a one electron integral composed of the dipole coupling between an orthogonalized plane wave and a Dyson orbital. The Dyson orbital is the overlap between the neutral and cationic state and represents the orbital from which the electron has been ionized. We first modeled a sequential pump-probe experiment on ABCU (C10H19N) and LiH at a fixed nuclear geometry. The pump pulse induces a motion of the electronic density in the neutral electronic states of the molecule that is subsequently probed by a sudden ionization. Our computations show that the MFPAD vary significantly as a function of the pump probe delay, and reflect the electronic dynamics. We also used the sudden ionization approximation to probe the dynamics in the cationic states of tetrapeptides. In that case, the pump-probe scheme is slightly different. The neutral molecule is first suddenly photoionized to the cation states, which creates a coherent superposition of states with amplitudes depending on the photoionization coupling elements. The motion of the electronic density along the molecular backbone of the tetrapeptide cation is then probed by a second sudden ionization. We also developed a coupled equations scheme based on the partitioning technique with the aim to describe the ionization dynamics and the electronic dynamics on the same level. The complete space is partitioned into a subspace composed of the neutral bound states and a subspace composed of the ionized states. We then integrate the time-dependent Schrödinger equation where the bound and ionized subspaces are coupled by the electric field. Using such formalism, we can describe pump probe experiments involving multiphoton excitation (and ionization) by an IR pulse and ionization by a train of attosecond pulses, as it is often encountered in attosecond experiment. We showed in a realistic IR pump – attosecond pulse train (APT) probe experiment on LiH that the non stationary electron dynamics can be triggered by an ultrashort IR pulse and probed by angularly resolved ultrafast ionization induced by a train of attopulses. We proposed a new probing scheme where the APT acts as a frequency filter that only probes the superposition of states with a beating frequency matching the time interval between two XUV attopulses of the train. The coupled equation scheme can be applied to larger systems since it only requires the electronic structure of the excited states of the molecule. We used coupled equations to investigate the charge migration in the cationic states of PENNA (C10H15N), a relatively large molecule composed on a phenyl chromophore on one side of the molecule and an amine chromophore on the other side. The IR pulse launches the dynamics in the cationic states that is then probed by a femtosecond XUV pulse. In the thesis, we also investigated the ionization of Super Atom Molecular Orbitals (SAMO), which are diffuse hydrogenoid like orbitals that can be found in fullerenes like C60 or in nanostructure. This work was carried out in collaboration E. Campbell group’s (University of Edinburgh) where angularly resolved photoelectron spectra were measured for gas phase C60 with c.a. 100fs pulse. The angularly resolved photoelectron spectrum only exhibits peaks corresponding the SAMO states. In order to support this attribution we computed the electronic structure and the photoionization lifetime of the 500 lowest excited states of C60 for a sudden photoionization. The SAMO states have a lifetime of the order of a femtosecond while the other states have photoionization lifetimes 3 to 4 orders of magnitudes larger. This difference in photoionization time scales explains why the SAMO states are the only states that photoionize during the c.a. 100fs pulse. The SAMO states act as doorway states for the photoionization. [less ▲]

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See detailControl of B16 mealnoma cells differentiation and proliferation by CuSO4 and vitamin C
De Pauw-Gillet, Marie-Claire ULg; Siwek, Brigitte; Pozzi, G. et al

in Anticancer Research (1990), 10(2A), 391-405

The paper demonstrates that the toxicity of CuSO4 in B16 melanoma cells is increased in serum-free medium and in the presence of Vitamin C. Vitamin C toxicity for B16 cells was increased in the presence ... [more ▼]

The paper demonstrates that the toxicity of CuSO4 in B16 melanoma cells is increased in serum-free medium and in the presence of Vitamin C. Vitamin C toxicity for B16 cells was increased in the presence of CUS04. [less ▲]

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