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See detailContribution d'un modèle à la détermination des zones de prévention autour d'un captage de sources à l’émergence dans les calcaires carbonifères du Condroz (Belgique)
Derouane, Johan; Dassargues, Alain ULg; Monjoie, Albéric ULg

in Actes du Colloque International Eau Souterraine en Région Agricole ESRA'96 (1996)

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See detailEssais de traçage et modélisation pour l'étude des zones de prévention d'un captage dans les craies du Crétacé (Belgique)
Dassargues, Alain ULg

in Actes du Colloque International Eau Souterraine en Région Agricole ESRA'96 (1996)

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See detailConceptual and computational challenges when coupling a groundwater model with ocean and river models
Dassargues, Alain ULg; Brouyère, Serge ULg; Carabin, Guy et al

in Computational Methods in Water Resources XI, Vol. 1: Computational Methods in Subsurface Flow and Transport Problems (1996)

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See detailFrom calibration on tracer test data to computation of protection zones: upscaling difficulties in a deterministic modelling framework
Dassargues, Alain ULg; Brouyère, Serge ULg; Derouane, Johan

in Kovar, K.; Van Der Heijde, P. (Eds.) ModelCARE 96: Calibration and Reliability in Groundwater Modelling (1996)

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See detailPerforation Strength of Geosynthetics and Sphericity of Coarse Grains: a new approach
Courard, Luc ULg; Antoine, R.

in Geotextiles & Geomembranes (1996), 14

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See detailInfluence of thermal acclimation on the survival of Sitophilus granarius (L) and Oryzaephilus surinamensis (L) at low temperatures
Mignon, Jacques ULg; Haubruge, Eric ULg; Gaspar, Charles ULg

in Netherlands Journal of Zoology (1996), 46(3-4), 317-325

Low temperatures have been used for many years to control populations of stored-product insects. The aim of aeration was primarily to cool down the grain and then to prevent its deterioration by reducing ... [more ▼]

Low temperatures have been used for many years to control populations of stored-product insects. The aim of aeration was primarily to cool down the grain and then to prevent its deterioration by reducing the number of insects. In Belgium, the mild winters enable insects to survive to the next season. In autumn, the progressive lowering of temperature has an acclimation effect on stored-product insects. The present study was undertaken to determine the survival at low temperatures of non cold-acclimated and laboratory- and field-cold-acclimated insects. We have chosen to work with the granary weevil Sitophilus granarius (L.) and the saw-toothed grain beetle Oryzaephilus surinamensis (L.). They are the most frequent stored-grain pests in Belgium. To compare the cold-hardiness of different laboratory cold-acclimated insects, S. granarius and O. surinamensis were placed at nine different cold-acclimation temperature regimes. Insects were kept at 5 degrees C for 2, 4 and 6 weeks or at -5 degrees C for 4, 7 and 14 days. To assess the field-cold-acclimation in autumn and in winter, insects were monthly taken from a bin and transferred to 5 degrees C for 6 weeks. S. granarius adults were more cold-hardy than O. surinamensis, but O. surinamensis adults compensated their cold-sensibility by a great ability to acclimate. S. granarius is able to survive the winter in Belgium because of its cold-hardiness while O. surinamensis survives because of its ability to acclimate to low temperatures. [less ▲]

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See detailEfficiency measurement, multiple-output technologie and distance functions: With application to European Railways
Coelli, Tim; Perelman, Sergio ULg

Report (1996)

The single-output production function has long been regarded as one of the principle limitations of the econometric approach to technical efficiency measurement. If one wished to investigate efficiency in ... [more ▼]

The single-output production function has long been regarded as one of the principle limitations of the econometric approach to technical efficiency measurement. If one wished to investigate efficiency in a multiple-output industry using econometric methods one would usually either: (a) aggregate outputs into a single index of output (e.g., total revenue or a multilateral Tornqvist output index); or (b) attempt to model the technology using a dual cost function. The first of these methods require that output prices be observable (and reflect revenue maximising behaviour), while the latter approach requires an assumption of cost-minimising behaviour. There are a number of instances, however, when neither of these requirements are met (the public sector contains many examples). In this study we outline the recently developed distance function solution to the multi-output problem. The method is illustrated using data on European railways. Output-orientated, input-orientated and constant returns to scale distance functions are estimated using corrected ordinary least squares. The distance function estimates are also compared with production function estimates involving aggregate output measures. These comparisons indicate that, for the case of European railways, a production function involving a multilateral Tornqvist output index exhibits substantially less aggregation bias relative to a production function that uses total revenue as a measure of aggregate output. [less ▲]

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See detailA simple technique to relieve Tribolium castaneum (Coleoptera: Tenebrionidae) of Acarophenax tribolii (Acarina: Pyemotidae).
Arnaud, Ludovic; Mignon, Jacques ULg; Gilson, Jean-Claude et al

in Tribolium Information Bulletin (1996), 36

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See detailChemical composition of solar-type stars
Neuforge, Corinne; Magain, Pierre ULg

in Pallavicini, R.; Dupree, A. K. (Eds.) Cool Stars, Stellar Systems, and the Sun, Proceedings of the 9th Cambridge workshop (1996)

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See detailPOLIS : a Project Information System for Urban Environmental Design
Teller, Jacques ULg

in Schiavoni, U. (Ed.) Proc. of COST UCE Action C4 conf. on Information Systems and Processes for Urban Civil Engineering Applications (1996)

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See detailLaparoscopic myomectomy today. Fibroids: management and treatment: the state of the art.
Donnez, Jacques; Mathieu, Pierre Emmanuel; Bassil, Salim et al

in Human Reproduction (1996), 11(9), 1837-40

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See detailLe campus universitaire comme espace public : des représentations aux pratiques
Frankignoulle, Pierre ULg; Bodson, Edith

in Etudes de Communication (1996), 18

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See detailFive years of experience for the promotion of a better nutritional environment in schools : The programme "Je mange bien à l'école" (I eat well at school) an innovatie project developed in the French-speaking Community of Belgium
Vandoorne, Chantal ULg

in Bouwman, L. I.; Boonekamp, G. M. M.; Koelen, M. A. (Eds.) Proceedings of the International conference on Health Promotion and Nutrition (1996)

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See detailAnthemis nobilis L. (roman chamomille): in vitro culture, micropropagation, and the production of essential oil.
Fauconnier, Marie-Laure ULg; Jaziri, Mondher; Homes, Jacques et al

in Bajaj, Y. P. S. (Ed.) Medicinal and aromatic plants IX (1996)

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See detailLa reconnaissance des répudiations. Note sous Cass., 11 décembre 1995
Carlier, Jean-Yves ULg

in Revue Trimestrielle de Droit Familial [=RTDF] (1996)

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See detailAttempt of Definition on Dipping Phenomenon
Moonen, martial; Saint-Remy, Annie ULg; Rorive, Georges ULg

in Journal of Hypertension (Supplement) (1996), 14(1),

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See detailFractures osseuses et ostéodensitométrie chez l'hémodialysé
Fontaine, Marie-Anne; Zandona, R; Geavlete, E et al

Conference (1995, December 04)

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See detailEIT: Extreme-Ultraviolet Imaging Telescope for the SOHO Mission
Delaboudinière, J.-P.; Artzner, G. E.; Brunaud, J. et al

in Solar Physics (1995), 162

The Extreme-ultraviolet Imaging Telescope (EIT) will provide wide-field images of the corona and transition region on the solar disc and up to 1.5 Ro above the solar limb. Its normal incidence multilayer ... [more ▼]

The Extreme-ultraviolet Imaging Telescope (EIT) will provide wide-field images of the corona and transition region on the solar disc and up to 1.5 Ro above the solar limb. Its normal incidence multilayer-coated optics will select spectral emission lines from Fe IX (171 Å), Fe XII (195 Å), Fe XV (284 Å), and He II (304 Å) to provide sensitive temperature diagnostics in the range from 6 × 10[SUP]4[/SUP] K to 3 × 10[SUP]6[/SUP] K. The telescope has a 45 x 45 arcmin field of view and 2.6 arcsec pixels which will provide approximately 5-arcsec spatial resolution. The EIT will probe the coronal plasma on a global scale, as well as the underlying cooler and turbulent atmosphere, providing the basis for comparative analyses with observations from both the ground and other SOHO instruments. This paper presents details of the EIT instrumentation, its performance and operating modes. [less ▲]

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See detailThe Beta-Lactamase Secreted by the Antarctic Psychrophile Psychrobacter Immobilis A8
Feller, Georges ULg; Sonnet, P.; Gerday, Charles ULg

in Applied & Environmental Microbiology (1995), 61(12), 4474-6

A class C beta-lactamase has been purified from the culture supernatant of the antarctic psychrophile Psychrobacter immobilis A8. This psychrophilic beta-lactamase displays a low level of thermal ... [more ▼]

A class C beta-lactamase has been purified from the culture supernatant of the antarctic psychrophile Psychrobacter immobilis A8. This psychrophilic beta-lactamase displays a low level of thermal stability and a low optimal temperature of activity. In contrast to other cold-adapted enzymes, its level of specific activity is not higher than that of mesophilic class C beta-lactamases. [less ▲]

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