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Peer Reviewed
See detailDaily-life difficulties in person recognition reported by young and elderly subjects
Schweich, M.; Van der Linden, Martial ULg; Brédart, Serge ULg et al

in Applied Cognitive Psychology (1992), 6

Detailed reference viewed: 16 (2 ULg)
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See detailDairy milk production in the North of Vietnam : a case study in Moc Chau
Bui, Thi Nga ULg; Tran Huu, Cuong; Lebailly, Philippe ULg

in International Journal of Advances in Management, Technology & Engineering Sciences (2012), II(3), 44-49

Dairy milk production in Moc Chau contributes to improve the welfare of farm households. It generates daily income for farmers, provides a highly nutritious food for people, create employment ... [more ▼]

Dairy milk production in Moc Chau contributes to improve the welfare of farm households. It generates daily income for farmers, provides a highly nutritious food for people, create employment opportunities for the society. Although it brings a rather high income for farmers, their lives are very hard, and their living standard is quite low.This studyaims to apply a monitoring system in farms to assist farmers improving their performance. Six field trips were carried out to help dairy farmersto monitor their farmsand collect economic and technical data in 2010-2012 in Moc Chau.The main findings are: stocking rate, milk yield and income were rather high but varied largely from this farm to others.Cost control in farm was not good thus dairy margin was not high. Purchased feed cost was too high.Homegrown feed accounted for a small part of cost but produced large amount of milk while purchased feed dominated a very large proportion of cost but produced less milk quantity.Most of the farmers followed the objective of increasing milk production but did not pay attention to the quality of herd and milk; did not make an optimal decision.Experience, land area, and herd size were the major factors that increased economic performance in farms. [less ▲]

Detailed reference viewed: 31 (7 ULg)
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See detailDairy milk production in the North of Vietnam : a case study in Mocchau
Bui, Thi Nga ULg; Tran Huu, Cong; Lebailly, Philippe ULg

in Hanoi University of Agriculture; Francophone Joint University Council (CIUF) (Eds.) Proceedings of Scientific Research Results - Institutional University Cooperation Program 2008-2012 (2013)

Detailed reference viewed: 24 (6 ULg)
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See detailDairy milk production in the North Vietnam : a case study in Moc Chau
Bui, Thi Nga ULg; Tran Huu, Cuong; Lebailly, Philippe ULg

Conference (2012)

Dairy milk production in Moc Chau contributes to improve the welfare of farm households. It generates daily income for farmers, provides a highly nutritious food for people, create employment ... [more ▼]

Dairy milk production in Moc Chau contributes to improve the welfare of farm households. It generates daily income for farmers, provides a highly nutritious food for people, create employment opportunities for the society. Although it brings a rather high income for farmers, their lives are very hard, and their living standard is quite low. This study aims to apply a monitoring system in farms to assist farmers improving their performance. Six field trips were carried out to help dairy farmers to monitor their farms and collect economic and technical data in 2010-2012 in Moc Chau. The main findings are: stocking rate, milk yield and income were rather high but varied largely from this farm to others. Cost control in farm was not good thus dairy margin was not high. Purchased feed cost was too high. Homegrown feed accounted for a small part of cost but produced large amount of milk while purchased feed dominated a very large proportion of cost but produced less milk quantity. Most of the farmers followed the objective of increasing milk production but did not pay attention to the quality of herd and milk; did not make an optimal decision. Experience, land area, and herd size were the major factors that increased economic performance in farms. [less ▲]

Detailed reference viewed: 87 (18 ULg)
See detail*daiva- + *martya-
Swennen, Philippe ULg

Scientific conference (2013, January 11)

Detailed reference viewed: 15 (0 ULg)
See detailDe Dakconstructie van de Karmelietenkerk, eerste dendrochronologische analyse
Hoffsummer, Patrick ULg; Houbrechts, David

in Stadsarcheologie (1993), 17(2), 29-34

Detailed reference viewed: 7 (0 ULg)
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See detailDalhem - Herve: notice explicative de la carte géologique de la Wallonie
Barchy, Laurent ULg; Marion, Jean-Marc ULg

Book published by Ministère de la Région wallonne, DGRNE (2000)

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using scientific data produced since the previous edition of Forir published in 1896 at the scale of 1/40 ... [more ▼]

New geological map of Wallonia published at the scale of 1/25.000, based on a new field work and using scientific data produced since the previous edition of Forir published in 1896 at the scale of 1/40.000 by the "Commission Géologique de Belgique". [less ▲]

Detailed reference viewed: 84 (14 ULg)
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See detailDaljit Nagra: Sourires de tigre et dents brunes
Munos, Delphine ULg

Article for general public (2012)

Detailed reference viewed: 17 (3 ULg)
See detailDalle porte della città... : l' esperienza con i rom di via Sesia
Mescoli, Elsa ULg; Biondi, Claudia; Trezzi, Marco

Report (2008)

Detailed reference viewed: 16 (0 ULg)
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See detailDalle sabbie all’apparato. Riflessioni su due recenti contributi alla Storia della Tradizione di Livio e Sallustio
Scappaticcio, Maria Chiara ULg

in Athenaeum : Studii Periodici di Letteratura e Storia (2013), (II),

Detailed reference viewed: 9 (2 ULg)
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See detailDam Break Flow Modelling and Geographical Distribution of the Roughness Coefficient
Paulus, Raphaël ULg; Ernst, Julien ULg; Dewals, Benjamin ULg et al

in Proc. 33rd IAHR Congress: Water Engineering for a Sustainable Environment (pp. 2429-2436) (2009)

Dam break flow modelling is a major field of research. In order to enable risk analysis in the downstream valleys of dams, 2D numerical simulations are of prime interest. These are based on the ... [more ▼]

Dam break flow modelling is a major field of research. In order to enable risk analysis in the downstream valleys of dams, 2D numerical simulations are of prime interest. These are based on the conservative set of shallow water equations. Beyond their numerical implementation, the challenge of the computation relies on the ability to handle very huge sets of high-precision data, in order to get the highest possible accuracy, whereas the computational time must remain realistic for simulations carried out on real valleys topography. In this paper, a simulation on about 2 500 000 cells is presented. Particularly, the results are compared and discussed regarding especially the exploitation of landuse data for the roughness. Beyond the examples of validation, the relevance of the developed methodology appears to be essential in the framework of risk analysis. [less ▲]

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See detailDam break flow modelling with uncertainty analysis
Dewals, Benjamin ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

Conference (2011, November)

The failure of a large dam may result in catastrophic floods in the downstream valley. However, past experience has revealed that loss of life and damage can be drastically reduced if crisis management is ... [more ▼]

The failure of a large dam may result in catastrophic floods in the downstream valley. However, past experience has revealed that loss of life and damage can be drastically reduced if crisis management is planned in advanced, including early-warning systems, organized communication and structural measures. This requires a fairly good knowledge of the inundation characteristics likely to be induced in case of a failure. Predictions of flood waves induced by dam failure are affected by a considerable level of uncertainty. Due to the extreme nature of such events, numerical models can hardly be calibrated and validated. Flow resistance parameterizations are designed for ranges of flow properties which significantly differ from those occurring during dam break flows. Large amounts of debris may also be transported by the flow and the details of the failure scenario remain usually unknown, such as sequence of dislodgement of dam wall fragments or breach formation time (e.g., Dewals et al. 2011). Nonetheless, most dam break flow studies so far have been conducted without systematic uncertainty nor sensitivity analyses. This is partly due to the high computational cost of the multidimensional flow models used to simulate dam break flows on natural topography. We present here the simulation of a real dam break flow with a systematic analysis of the uncertainty resulting from the roughness coefficient, the failure hydrograph and topographic data. The flow simulations have been conducted with the model WOLF 2D developed at the University of Liege. It solves the fully dynamic shallow-water equations based on a finite volume scheme and a self-developed flux-vector splitting (Erpicum et al. 2010a; Erpicum et al. 2010b). Monte-Carlo simulations have been used to perform the uncertainty analysis. The two-dimensional flow model is computationally too costly to perform a high number of repeated runs, as needed for Monte Carlo simulations. Therefore, a “reduced complexity model” has been set up, in the form of multidimensional Hermite polynomials. The method developed by Isukapalli et al. (Isukapalli et al. 2004) indicates the number of simulations of the complete model needed to calibrate the polynomials, as well as the parameter values to be used in these calibration runs. The methodology has been tested for a real dam break which occurred in Spain in 1982 (Alcrudo and Mulet 2007) and for which a number of observations are available (mainly maximum water depths at different locations in a town). The presentation will show the applicability and efficiency of the methodology, which is readily available for real-world analyses. Such uncertainty analysis for dam break flows disclose crucial information for practical risk management. In particular, they reveal that the uncertainty ranges on maximum water depth and time of arrival of the front are not symmetric (overestimation vs. underestimation) and very unevenly distributed in space. [less ▲]

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See detailDam break flow modelling with uncertainty analysis
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Pirotton, Michel ULg et al

in Gourbesville, Philippe; Cunge, Jean; Caignaert, Guy (Eds.) Advances in Hydroinformatics (2013)

Handling uncertainties in dam break flow modelling is of primary interest. Therefore, a procedure is presented here to conduct systematic analysis of the uncertainties resulting from the roughness ... [more ▼]

Handling uncertainties in dam break flow modelling is of primary interest. Therefore, a procedure is presented here to conduct systematic analysis of the uncertainties resulting from the roughness coefficient, the breaching hydrograph and topographic data. The flow simulations have been conducted with the model WOLF 2D developed at the University of Liege. This two-dimensional flow model is computationally too costly to perform a high number of repeated runs, as needed for Monte Carlo simulations. Therefore, a “reduced complexity model” has been set up, in the form of multidimensional Hermite polynomials. This method, developed by Isukapalli et al. (2004) and first applied to dam break flow by Niemeyer (2007), involves a reduced number of runs of the complete model to calibrate the polynomials. This paper shows the applicability and efficiency of the methodology, but it also discusses previously unreported shortcomings of the approach, together with hints to overcome them. Results of such uncertainty analysis for dam break flow modelling disclose crucial information for practical risk management. In particular, they reveal that the uncertainty ranges on maximum water depth and time of arrival of the front are not symmetric (overestimation vs. underestimation) and very unevenly distributed in space. [less ▲]

Detailed reference viewed: 41 (7 ULg)
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See detailDam rehabilitation study with process oriented numerical flow models
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Detrembleur, Sylvain ULg et al

in Proceedings of the 5th International Conference on Dam Engineering (2007)

In the global framework of climate change, hydraulic structures rehabilitation is an up-to-date subject requiring appropriate design and impact studies. In this scope, upgrading the release facilities of ... [more ▼]

In the global framework of climate change, hydraulic structures rehabilitation is an up-to-date subject requiring appropriate design and impact studies. In this scope, upgrading the release facilities of dams is an important point when both up and downstream consequences, often irreversible, of badly controlled rising of water in the reservoir, become awarded. Suitable numerical models, coupled with contemporary computational possibilities, allow engineers to forecast the complex situations induced on real structures by extreme events with increasing representativeness and accuracy. In this field, WOLF software, a process oriented free surface flows computation package completely set up by the HACH, has proved its efficiency and reliability for years by numerous theoretical, experimental as well as on real structures applications. In this paper, the rehabilitation study of the Nisramont dam (Belgium) is presented. Due to its temporary primary tasks, the stilling basin downstream of the crest spillway has been designed for a short time use. It’s the same with the 3 bottom outlets, which were never equipped with valves and are thus unusable for the reservoir management. In order to secure the structure and to make it comply with its definitive working objectives, while taking into account climate change observations, the HACH has been entrusted with evaluating up to date critical flood discharges and with designing a system in accord with these new values for the rehabilitation of the bottom outlets and the evacuation of the floods. Several construction options have been compared and optimized by means of the hydrodynamic software WOLF. [less ▲]

Detailed reference viewed: 70 (3 ULg)
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See detailDam treatment with insulin-like growth factor-I monoclonal antibodies induce an alteration of fetal development
Renaville, Robert ULg; Devolder, Anne; Sneyers, Myriam et al

in Archives Internationales de Physiologie, de Biochimie et de Biophysique (1992), 100

Detailed reference viewed: 5 (0 ULg)
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See detailDam-break flow computation based on an efficient flux-vector splitting
Erpicum, Sébastien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Journal of Computational & Applied Mathematics (2010), 234

Dam-break flow computation is a task of prime interest in the scope of risk analysis processes related to dams and reservoirs. In this paper, a 2D finite volume multiblock flow solver, able to deal with ... [more ▼]

Dam-break flow computation is a task of prime interest in the scope of risk analysis processes related to dams and reservoirs. In this paper, a 2D finite volume multiblock flow solver, able to deal with natural topography variation, is presented in details. The model is based on an efficient Flux Vector Splitting method developed by the authors. A number of validation examples are comprehensively described. [less ▲]

Detailed reference viewed: 158 (57 ULg)
Peer Reviewed
See detailDam-break flow computation using high resolution DEM
Dewals, Benjamin ULg

Conference (2008, May 26)

Detailed reference viewed: 17 (2 ULg)
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See detailDam-break flow computation using high resolution DEM
Erpicum, Sébastien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

in Hogge, Michel; Van Keer, R.; Noels, L. (Eds.) et al Proceedings of the 4th International Conference on Advanced Computational Methods in Engineering (2008)

Dam-break flow computation is a task of prime interest in the scope of risk analysis processes related to dams and reservoirs. High resolution Digital Elevation Models (DEMs) available today provide ... [more ▼]

Dam-break flow computation is a task of prime interest in the scope of risk analysis processes related to dams and reservoirs. High resolution Digital Elevation Models (DEMs) available today provide extremely dense and accurate topography information in the valley downstream of these structures, even in urban area. In this paper, a 2D finite volume flow solver, able to deal with these DEMs, is presented in details. Validation examples are comprehensively described. [less ▲]

Detailed reference viewed: 66 (7 ULg)
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See detailDam-break flow numerical modeling considering structural impacts on buildings
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proc. 33rd IAHR Congress: Water Engineering for a Sustainable Environment (2009)

Detailed reference viewed: 13 (2 ULg)