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See detailThe influence of a grain boundary on the thermal transport properties of bulk, melt-processed Y-Ba-Cu-O
Marchal, C.; Fagnard, Jean-François ULg; Shi, Y. H. et al

in Superconductor Science and Technology (2013), 26

We report the dependence of thermal conductivity, thermoelectric power and electrical resistivity on temperature for a bulk, large grain melt-processed Y-Ba-Cu-O (YBCO) high temperature superconductor ... [more ▼]

We report the dependence of thermal conductivity, thermoelectric power and electrical resistivity on temperature for a bulk, large grain melt-processed Y-Ba-Cu-O (YBCO) high temperature superconductor (HTS) containing two grains separated by a well-defined grain boundary. Transport measurements at temperatures between 10 and 300 K were carried out both within one single grain (intra-granular properties) and across the grain boundary (inter-granular properties). The influence of an applied external magnetic field of up to 8 T on the measured sample properties was also investigated. The presence of the grain boundary is found to affect strongly the electrical resistivity of the melt-processed bulk sample, but has almost no effect on its thermoelectric power and thermal conductivity, within experimental error. The results of this study provide direct evidence that the heat flow in multi-granular melt-processed YBCO bulk samples should be virtually unaffected by the presence of grain boundaries in the material. © 2013 IOP Publishing Ltd. [less ▲]

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See detailInfluence of a liquid nutritional supplement on water intake in experimental Beagle dogs
Rotat, Christelle; Lhoest, Estelle; Rauw, Anaelle ULg et al

in Open Journal of Veterinary Medicine (2016), 6

The objectives were to evaluate the effects of a liquid nutritional supplement formulated for dogs on water intakes and urine output. A liquid nutritional supplement was tested by way of a cross-over ... [more ▼]

The objectives were to evaluate the effects of a liquid nutritional supplement formulated for dogs on water intakes and urine output. A liquid nutritional supplement was tested by way of a cross-over design in 8 experimental healthy Beagle dogs (4 males and 4 females, aged 9.3 years). The supplement (87 percent water, 2.7 percent protein, 2.6 percent fat, 0.4 percent crude fiber) was added to water and tested at 2 incorporation rates (50 or 70 ml/day/dog—D50 or D70) versus the control placebo (CO-water only). The dogs were kept in a controlled environment; water intakes and urine output were measured. Individual water intakes were characterised by large variations. Mean water intake increased significantly by 28 percent in dogs receiving the liquid nutritional supplement, in both genders, irrespectively of the dosage. Urine output was also increased, by 55 percent. Faeces scores remained unchanged. It was concluded that the liquid supplement increased water intake and urine output in a safe way, without increasing dramatically the daily dietary sodium chloride intake. The recommended dosage of the manufacturer—50 ml/day for dogs weighing 10 - 20 kg BW is efficient. Increasing the dosage had no advantage, nor adverse effects. Increased water intake and urine output is of interest for dogs suffering from urolithiasis. [less ▲]

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See detailInfluence of a long-term storage in anaerobic conditions on Norway spruce (Picea abies, L. Karst.) physical and mechanical wood properties
Riguelle, Simon ULg; Lesire, Cécile ULg; Hebert, Jacques ULg et al

in Wood Material Science & Engineering (2016)

Timber storage is a key aspect of storm damage management. After huge storms, sprinkling storage is usually the most used conservation process but anaerobic storage in sealed silos appears as good ... [more ▼]

Timber storage is a key aspect of storm damage management. After huge storms, sprinkling storage is usually the most used conservation process but anaerobic storage in sealed silos appears as good alternative to preserve wood quality over long periods. This paper investigates the impact of long-term (57 months) storage of Norway spruce logs in anaerobic atmosphere on wood properties. Tests were performed on clear wood specimens and on lumbers to determine the modulus of elasticity (E), the static bending strength (σf) and the dynamic bending strength (K). Storage effects on impregnability and colour variation were also studied. Results show no effect of storage on E, σf and K. The naturally poor impregnability of Norway spruce is not improved by the anaerobic conditions, compared to traditional wet storage. Triangle tests reveal no discernible colour variation between logs that underwent anaerobic storage and the control sample. As a conclusion, despite a mould (Gliocladium solani) frequently observed on logs surface after the storage, the process offers ideal conservation conditions. While overall cost remains the main drawback for using anaerobic storage at large scale, the process can be recommended for high value logs, especially since it has few environmental impacts. [less ▲]

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See detailInfluence of a low magnetic field on the thermal diffusivity of Bi2Sr2CaCu2O8
Dorbolo, Stéphane ULg; Ausloos, Marcel ULg

in Physical Review B (2002), 65(21),

The thermal diffusivity of a Bi-2212 polycrystalline sample has been measured under a 1 T magnetic field applied perpendicularly to the heat flux. The magnetic contribution to the heat carrier mean free ... [more ▼]

The thermal diffusivity of a Bi-2212 polycrystalline sample has been measured under a 1 T magnetic field applied perpendicularly to the heat flux. The magnetic contribution to the heat carrier mean free path has been extracted and is found to behave as a simple power law. This behavior can be attributed to a percolation process of electrons in the vortex lattice created by the magnetic field. [less ▲]

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See detailInfluence Of A New Axial Impeller On K(L)A And Xylanase Production By Penicillium Canescens 10-10c
Bakri, Yasser; Jacques, Philippe; Shi, Kui et al

in Applied Biochemistry and Biotechnology (2002), 98

The effects of a new axial impeller (HTPG4) on oxygen volumetric transfer coefficient, KLa, and xylanase production by Penicillium canescens 10-10c were studied and compared for dual-impeller systems, one ... [more ▼]

The effects of a new axial impeller (HTPG4) on oxygen volumetric transfer coefficient, KLa, and xylanase production by Penicillium canescens 10-10c were studied and compared for dual-impeller systems, one with one DT4 impeller below and one HTPG4 above (DT4-HTPG4) and one with two DT4 (DT4-DT4) impellers, in a 5-L bioreactor. The volumetric coefficient of oxygen transfer was measured in culture medium using a gassing-out method at different gassing rates and agitation speeds. We observed that the DT4-HTPG4 combination provided better KLa performance than the DT4-DT4 combination. The two combinations were also tested for their influence on xylanase production by a filamentous microorganism; P. canescens 10-10c. These experiments demonstrated that the DT4-HTPG4 combination impeller enhanced enzyme production up to 23% compared with the DT4-DT4 combination at an aeration rate of 1 vvm and an agitation speed of 600 rpm. The main cause for this difference is thought to be a higher shear stress generated by the DT4-DT4 combination, which damages the mycelium of P. canescens and decreases xylanase production. [less ▲]

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See detailInfluence of a New Axial Impeller on KLa and Xylanase Production by Penicillium canescens 10-10c
Bakri, Y.; Jacques, Philippe ULg; Shi, L.K. et al

in Applied Biochemistry and Biotechnology (2002), (98-100), 679-686

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See detailInfluence of a nonlinear reference temperature profile on oscillatory Benard-Marangoni convection.
Dondlinger, M.; Colinet, P.; Dauby, Pierre ULg

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2003), 68(6 Pt 2), 066310

We analyze oscillatory instabilities in a fluid layer of infinite horizontal extent, heated from above or cooled from below, taking into account the nonlinearity of the reference temperature profile ... [more ▼]

We analyze oscillatory instabilities in a fluid layer of infinite horizontal extent, heated from above or cooled from below, taking into account the nonlinearity of the reference temperature profile during the transient state of heat conduction. The linear stability analysis shows that a nonlinear reference temperature profile can have a strong effect on the system, either stabilizing or destabilizing, depending on the relative importance of buoyancy and surface tension forces. For the nonlinear analysis we use a Galerkin-Eckhaus method leading to a finite set of amplitude equations. In the two-dimensional (2D) case, we show the solution of these amplitude equations are standing waves. [less ▲]

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See detailInfluence of a reduced gravity on the volume fraction of a monolayer of spherical grains
Dorbolo, Stéphane ULg; scheller, tom; Ludewig, François ULg et al

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2011), 84

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See detailInfluence of a short education/training program on trunk muscle recruitment during spine protective exercises
Demoulin, Christophe ULg; Delfosse, Catherine; SOMVILLE, Pierre-René ULg et al

in Abstract book of 6th Interdisciplinary World Congress on Low Back & Pelvic Pain (2007, November)

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See detailInfluence of a short time specific strength training on iso-inertial performances
Jidovtseff, Boris ULg; Croisier, Jean-Louis ULg; Scimar, N. et al

in Abstract Book of the 4th International Conference on Strength Training (Serres, Greece) (2004, November)

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See detailInfluence of a static wing wake on the stall flutter behavior of a flexible wing
Li, Jing; Dimitriadis, Grigorios ULg

in Proceedings of the 13th International Conference on Wind Engineering, ICWE13 (2011, July 13)

The subject of this paper is the experimental study of the aeroelastic behavior of a wing undergoing stall flutter in the vicinity of second, static wing. While stall flutter has been the subject of ... [more ▼]

The subject of this paper is the experimental study of the aeroelastic behavior of a wing undergoing stall flutter in the vicinity of second, static wing. While stall flutter has been the subject of several investigations, such work has almost always concentrated on isolated wings. Stall flutter is a phenomenon that is mostly encountered in rotating blades, such as wind turbine or helicopter blades. In such cases, the phenomenon is influenced by the wake of the preceding blade. This paper presents a series of experiments carried out at the Goldstein Laboratory of the University of Manchester, concerning the phenomenon of stall flutter influenced by the proximity of a static wing. The work is an extension of the single wing stall flutter experiments presented by Dimitriadis and Li (2009). [less ▲]

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See detailInfluence of a water purification unit on the contamination level of salmonella in outcoming water and sludge
Jacob, Benoit; Korsak Koulagenko, Nicolas ULg; Grooven, Bénédicte et al

in Annales de Médecine Vétérinaire (2002), 146(5), 303-310

Foodborne pathogens occasionally harboured in the gastro-intestinal tract of some domestic animals may be retrieved in slaughterhouses waste water and in sludge of water purification units. Salmonella ... [more ▼]

Foodborne pathogens occasionally harboured in the gastro-intestinal tract of some domestic animals may be retrieved in slaughterhouses waste water and in sludge of water purification units. Salmonella, athogen common to man and Animals, is often used as a biological risk indicator. The aim of the present study was to assess effectiveness of a recent water purification unit by rapid and semi-quantitative detection of this micro-organism. The water purification unit collects waste water of seven food-processing industries, including a pig slaughterhouse. This latest was the main source of Salmonella contamination with a level of more 103 colony forming unit (CFU) per ml, that was very close to the average level of contamination of total incoming waste water. The unit, whose principle of action is based on biological purification, has permitted a 4 log10 reduction of Salmonella contamination, with a final contamination level of less than 1 CFU/ml. It was observed only a little decrease of contamination levels during the biological treatment steps, in contrast with the one observed during the clarification step. This was due to adsorption of bacteria by material in suspension. Fresh sludge were harboured an average of 102 CFU of Salmonella per gram. In the beginning of December 1999, two sludge piles were let on the ground along a field and sampled microbiologically every month. Seven month later, no Salmonella were recovered from the piles. 309 [less ▲]

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See detailThe influence of acid rains on the geochemistry of aluminium
Wollast, Roland; Chou, L.; Debbaut, Vincent ULg et al

in Scope Belgium : proceedings : acid deposition and sulphur cycle (1984, June)

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See detailInfluence of acute sleep loss on the neural correlates of alerting, orientating and executive attention components
Muto, Vincenzo ULg; Shaffii, Anahita ULg; Matarazzo, Luca et al

in Journal of Sleep Research (2012), 21(6), 648-58

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See detailInfluence of Adhesive Rough Surface Contact on Micro-Switches
Wu, Ling ULg; Rochus, Véronique ULg; Noels, Ludovic ULg et al

Scientific conference (2009)

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See detailInfluence of Adhesive Rough Surface Contact on Micro-Switches
Wu, Ling ULg; Rochus, Véronique ULg; Noels, Ludovic ULg et al

in Journal of Applied Physics (2009), 106(11), 113502

Stiction is a major failure mode in micro electro-mechanical systems (MEMS). Undesirable stiction, which results from contact between surfaces, threatens the reliability of MEMS severely as it breaks the ... [more ▼]

Stiction is a major failure mode in micro electro-mechanical systems (MEMS). Undesirable stiction, which results from contact between surfaces, threatens the reliability of MEMS severely as it breaks the actuation function of MEMS switches for example. Although it may be possible to avoid stiction by increasing restoring forces using high spring constants, it follows that the actuation voltage has also to be increased significantly, which reduces the efficiency. In our research, an electrostatic-structural analysis is performed to estimate the proper design range of the equivalent spring constant which is the main factor of restoring force in MEMS switches. The upper limit of equivalent spring constant is evaluated based on the initial gap width, the dielectric thickness, and the expected actuation voltage. The lower limit is assessed on the value of adhesive forces between the two contacting rough surfaces. The MEMS devices studied here are assumed to work in a dry environment. In these operating conditions only the Van der Waals forces have to be considered for adhesion. A statistical model is used to simulate the rough surface, and the Maugis’s model is combined with Kim’s expansion to calculate adhesive forces. In the resulting model, the critical value of the spring stiffness depends on the material and surface properties, such as the elastic modulus, surface energy and surface roughness. The aim of this research is to propose simple rules for design purposes. [less ▲]

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See detailInfluence of affective meaning on memory for contextual information
D'Argembeau, Arnaud ULg; Van der Linden, Martial ULg

in Emotion (Washington, D.C.) (2004), 4(2), 173-188

In 4 experiments, the authors investigated the influence of the affective meaning of words on memory for 2 kinds of contextual features that differ in the amount of effortful processes they require to be ... [more ▼]

In 4 experiments, the authors investigated the influence of the affective meaning of words on memory for 2 kinds of contextual features that differ in the amount of effortful processes they require to be encoded in memory (i.e., color and spatial location). The main results showed that memory for color, in which words were typed, was better for emotional than for neutral words, but only when color information was learned incidentally. In contrast, spatial location of the words was better remembered for emotional than for neutral words whatever the encoding conditions (intentional vs. incidental). It is suggested that the influence of affective meaning on context memory may involve an automatic attraction of attention to contextual features associated with emotional words. [less ▲]

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See detailThe influence of affective valence on DRM false memories in younger and older adults
Dehon, Hedwige ULg; Laroi, Frank; Van der Linden, Martial

Poster (2011)

Detailed reference viewed: 23 (0 ULg)