Thermal conductivity (and thermoelectric power) of neutron irradiated Bi-based high critical temperature superconductors

in Institute of Physics Conference Series (1995), 148

Ceramic superconductors with a nominal composition Bi1.5Pb0.5Sr2Ca2 Cu3O10 were irradiated by fast neutrons (E > 0.1 MeV) with fluences up to 2 * 10(18) cm(-2). The thermal conductivity kappa and the ... [more ▼]

Ceramic superconductors with a nominal composition Bi1.5Pb0.5Sr2Ca2 Cu3O10 were irradiated by fast neutrons (E > 0.1 MeV) with fluences up to 2 * 10(18) cm(-2). The thermal conductivity kappa and the thermoelectric power were simultaneously measured by means of a steady flow method. The thermal conductivity magnitude and temperature variation are comparable to data previously reported by other authors. We evaluate that the electron thermal conductivity contributes to no more than 5 % of the measured kappa which is thus dominated by the phonon component. Neutron irradiation increases the density of structural defects. This gradually reduces kappa absolute values in the normal state. The highest fluences reduce the magnitude of kappa and the height of the maximum in the superconducting state. This is accompanied by an electrical resistivity increase. Since the electrical resistivity changes much raster with irradiation fluence than the thermal conductivity does we conclude that the irradiation affects more the electron than the phonon scattering. From the thermoelectrical power data we calculate the Fermi level value which is insensitive to the irradiation. [less ▲]

Démarche expérimentale et robotique pédagogique

Conference (1995)

Integral Field Spectroscopy of Selected Extragalactic Objects with FUEGOS

in Walsh, J.; Danziger, J. (Eds.) Science with the VLT (1995)

An Automata-Theoretic Approach to Presburger Arithmetic Constraints

in Lecture Notes in Computer Science (1995), 983

This paper introduces a finite-automata based representation of Presburger arithmetic definable sets of integer vectors. The representation consists of concurrent automata operating on the binary ... [more ▼]

This paper introduces a finite-automata based representation of Presburger arithmetic definable sets of integer vectors. The representation consists of concurrent automata operating on the binary encodings of the elements of the represented sets. This representation has several advantages. First, being automata-based it is operational in nature and hence leads directly to algorithms, for instance all usual operations on sets of integer vectors translate naturally to operations on automata. Second, the use of concurrent automata makes it compact. Third, it is insensitive to the representation size of integers. Our representation can be used whenever arithmetic constraints are needed. To illustrate its possibilities we show that it can handle integer programming optimally, and that it leads to a new original algorithm for the satisfiability of arithmetic inequalities. [less ▲]

L'évolution des charpentes de toitures en Belgique et dans le nord de la France: apports récents de la dendrochronologie

in Le bois dans l'architecture (1995)

Effect of microstructural transformation on the creep resistance of Zn-Al-Cu alloys

in Proceedings of Trinocular Joint Meeting on Electron Microscopy (1995)

This paper illustrates the modification of the structure induced by creep treatments. The aim of this study is to compare the evolution of the structure after creep tests on samples treated at 100°C and ... [more ▼]

This paper illustrates the modification of the structure induced by creep treatments. The aim of this study is to compare the evolution of the structure after creep tests on samples treated at 100°C and 250°C. Creep tests have been carried out at 120°C with a tensile stress of 40 MPa and at 20°C with a tensile stress of 100 MPa. [less ▲]

Comparative effect of various potassium channel openers on the firing rate of hippocampal and dopaminergic neurons in vitro

in Pflügers Archiv : European Journal of Physiology (1995), 430

Les monuments de la Ville de Laon et la dendrochronologie

in Le bois dans l'architecture (1995)

Monoclonal antibodies to bovine insulin-like growth factor-binding protein -2 and -3: production and preliminary characterization

in Hormone binding proteins: physiology and clinical implications symposium (1995)

Integrated Use of two Antagonistic Yeasts to Post-Harvest Treatments against Diseases on Apples

Poster (1995)

Sequencing of DNA fragments from chromosome X (cosmids cos1-cos148 and plasmid p46RB), from chromosome XV (cosmid EOA417) and from chromosome VII (cosmid EGH175) of S. cerevisiae.

Poster (1995)

Influence of organic modifiers and complexing agents on the separation of non-steroidal anti-inflammatory drugs by capillary zone electrophoresis

in Journal de Pharmacie de Belgique (1995), 50

[1-11C]Bromoethane: an alternative to the use of [1-11C]iodoethane.

in Journal of Labelled Compounds & Radiopharmaceuticals (1995), 37

Genetic and biochemical characterization of cytoplasmic and mitochondrial ASN-tRNA synthetase functions in two mutans yeast strains.

Poster (1995)

Recherches paléolithiques et mésolithiques en Belgique 1994 (Province de Namur)

in Actes de la troisième Journée d'Archéologie namuroise (1995)

Automated determination of drugs in ibological fluids using solid-phase extraction coupled to HPLC

in Dissertation abstracts international (1995)

La mesure générale anti-abus de droit étendue aux impôts indirects

in Fiscalité: un bilan des mesures anti-évasion fiscale (1995)

Démarche expérimentale et robotique pédagogique. Communication présentée au colloque de l'Université du Maine, Le Mans

Conference (1995)

Advances in Arbitrary Eulerian-Lagrangian Finite Element Simulation of Large Deformation Process

in fourth International Conference on Computational Plasticity (1995)

Automated determination of acetylsalicylic, salicylic and salicyluric acids in human plasma using solid-phase extraction and HPLC

in Journal de Pharmacie de Belgique (1995), 50

Analytical and clinical evaluation of automated immunoassays for serum CK-MB and myoglobin using the OPUS MAGNUM analyser

in Clinical Chemistry (1995), 41

Contribution to the study of the flora and the ecology of cave blue-green algae.

Conference (1995)

"Relatives en rallonge" ou "relatifs de liaison" : l'exemple de Tacite

in Heberlein, Friedrich; Bammesberger, A. (Eds.) Akten des VIII. internationalen Kolloquiums zur lateinischen Linguistik, Eichstätt, 24-28/04/1995 (1995)

Contribution à l’étude des diatomées des grottes de Belgique.

Conference (1995)

Acute acetaldehyde toxicity: an in vivo microdialysis study of neurotransmitters in the nucleus accumbens

in Alcohol & Alcoholism (1995), 30

Growth-hormone binding protein (GHBP) binds prolactin in cattle plasma

Conference (1995)

Pyridothiadiazines inhibit glucose-induced insulin release by activating ATP-sensitive K+ channels

Conference (1994, December 10)

Fumure azotée et protection fongicide des céréales d'hiver en Belgique

in Quatrième conférence internationale sur les maladies des plantes (1994, December 06)

The determination and the splitting of winter cereals nitrogen fertilisation as proposed and used in Belgium include three applications (tillering, beginning of stem elongation, flag leaf). While ... [more ▼]

The determination and the splitting of winter cereals nitrogen fertilisation as proposed and used in Belgium include three applications (tillering, beginning of stem elongation, flag leaf). While permitting to improve yield and haven quality, this largely contribute to limit croptogamic diseases development and thus the number of fungicide treatments needed to achieve an economic optimum. [less ▲]

Epidémiologie des facteurs de risque cardiovasculaire : dyslipidémies et hypertension artérielle.

Conference (1994, December 03)

Développement d'un boîtier d'essai dédié à l'expérimentation d'un roulement à billes noyé dans l'oxygène liquide

in Mécanique Industrielle et Matériaux (1994, December), 47(5), 463-467

Les roulements à billes de la turbopompe alimentant un moteur fusée cryotechnique en oxygène liquide sont des organes mécaniques dont la définition est délicate. Pour le compte de l'Agence Spatiale ... [more ▼]

Les roulements à billes de la turbopompe alimentant un moteur fusée cryotechnique en oxygène liquide sont des organes mécaniques dont la définition est délicate. Pour le compte de l'Agence Spatiale Européenne (E.S.A.), sous la responsabilité de la Société Européenne de Propulsion (S.E.P.) et la maîtrise d'œuvre du Centre National d'Etudes Spatiales (C.N.ES.-France), un programme de caractérisation expérimentale du fonctionnement de ces roulements a conduit une association de plusieurs laboratoires de l'Université de Liège à réaliser un banc d'essai spécifique. Grâce à la pneumatique, le concept mécanique retenu permet de solliciter le roulement à éprouver par des charges radiales et/ou axiales variables en cours d'essai. Ce concept mécanique, la nature et la régulation des fluides nécessaires au bon fonctionnement du banc, la conduite informatique d'un essai ainsi que la mesure des paramètres physiques utiles à la quantification des performances du roulement noyé dans l'oxygène liquide font l'objet de développements ci-après. Parmi ces paramètres physiques, on dénombre la température de la bague intérieure du roulement. Cette température s'avère décisive pour détecter rapidement les signes précurseurs de la dégradation du roulement soumis à des conditions précises de charges, de débit d'oxygène liquide sous pression et de vitesse de rotation. [less ▲]

Les lésions de la moelle épinière : du modèle expérimental aux transplantations.

Conference (1994, November 23)

L'écho-Doppler en médecine néonatale

Conference (1994, November 15)

Further results on the line-profile variability of WR 134

in Astrophysics & Space Science (1994, November 01), 221

We discuss a few conclusions previously derived from the analysis of the line-profile variability of the Wolf-Rayet star WR 134, some details are made more explicit. In addition, we present a new set of ... [more ▼]

We discuss a few conclusions previously derived from the analysis of the line-profile variability of the Wolf-Rayet star WR 134, some details are made more explicit. In addition, we present a new set of data and briefly comment on recent results deduced from its analysis. [less ▲]

La Belgique francophone : laboratoire de la télévision sans frontière

in Actes du Colloque du 6ème Forum Européen de la Télévision et du Cinéma (1994, November)

Modulation and mechanism of action of BPDZ 44 on ATP-sensitive potassium channels in isolated rat insulin-secreting cells

Poster (1994, November)

Overhead transmission lines design. Some mechanical aspects.

in Proceedings of the ICPST'94 (1994, October)

3-DOF galloping model of power lines.

Pyridothiadiazines as potent activators of KATP channels and inhibitors of insulin secretion

Poster (1994, October)

Different tissue selectivity of pyrido- and benzothiadiazinedioxides, potassium channel openers related to diazoxide

Poster (1994, October)

Localisation et visibilité des franges d’interférogrammes holographiques

Conference (1994, October)

Méthodes de mesure de la phase

Conference (1994, October)

Drug sensitivity and clinical aspects of Plasmodium falciparum malaria in african children

Conference (1994, October)

Qualité technologique du froment d'hiver : impact des facteurs variétaux et culturaux sur l'aptitude au fractionnement selon le procédé Batter.

Conference (1994, October)

Working memory in Down syndrome : Training the rehearsal strategy

Poster (1994, September 23)

Verbal short-term memory skills of Down's syndrome subjects are very poor (Hulme & MacKenzie, 1992; Bower & Hayes, 1994). The poster reports on the verbal short-term memory skills in Down syndrome and on ... [more ▼]

Verbal short-term memory skills of Down's syndrome subjects are very poor (Hulme & MacKenzie, 1992; Bower & Hayes, 1994). The poster reports on the verbal short-term memory skills in Down syndrome and on the possibility of increasing durably memory span by using a rehearsal training strategy. Three tasks (letters span, digits span and words span) have been presented to two groups of 12 Down's syndrome subjetcs as a pre-test. Each group contained 4 chilren, 4 teenagers and 4 young adults. The groups had similar memory span and mental age at the beginning of the study. None of these subjects seemed to rehearse. One group has been exposed to an intensive rehearsal training during 8 weeks (half an hour / week) (methodology inspired from Hulme & MacKenzie, 1992, and Broadley & MacDonald, 1993). The other group did not receive any training. After the training, the 3 initial memory tasks have been presented to the 2 groups as a post-test. The trained subjects significatively improved their memory span (on the 3 measures and on a global measure) whereas the non-trained subjects did not improve at all. We must notice that the young adults needed a longer training (10 weeks) in order to show a signifiant improvement for the three measures. Only the trained subjects showed, at this time, clear signs of systematic rehearsal. Six weeks after the first post-test a second post-test has been conducted. The trained subjects did not seem to rehearse systematically anymore, their memory performances felt significantly lower than after the first post-test but remained significatively higher than at the beginning of the study [less ▲]

La logopédie: généraliste ou spécialiste?

Conference (1994, September 20)

Une expérience de co-formation entre un institut supérieur pédagogique et un service universitaire autour du modèle d'action défini par Eva Hüvös. Former des enseignants. Pratiques et recherches

Conference (1994, September 14)

Alignment of the Extreme-UV Imaging Telescope (EIT)

Conference (1994, September 05)

Temperature, Ozone, and Nitric Oxide Experiment (TONE) for the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) mission

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1994, September 01)

The temperature-ozone-nitric oxide experiment (TONE) on the thermosphere, ionosphere, mesosphere, energetics, and dynamics (TIMED) mission consists of two ultraviolet spectrometers and an infrared ... [more ▼]

The temperature-ozone-nitric oxide experiment (TONE) on the thermosphere, ionosphere, mesosphere, energetics, and dynamics (TIMED) mission consists of two ultraviolet spectrometers and an infrared photometer. A medium resolution spectrometer (MRS) covers the spectral region from 210 to 247 nm with 0.2 nm resolution, and a low resolution spectrometer/infrared photometer (LRS/IRP) covers the 235 to 320 nm region with 2.0 nm resolution, and measures the 1.27 micron emission from molecular oxygen excited by ozone photolysis. The Earth's limb is scanned by articulation mirrors which also serve as the field- of-view limiting elements. The TONE measures profiles of emission as a function of altitude on the Earth's limb. The primary measurements include profiles of Rayleigh scattered sunlight and 1.27 micron emission in the mesosphere and lower thermosphere, and fluorescent emission from nitric oxide in the upper mesosphere and thermosphere. The inverted radiance measurements will yield profiles of temperature, density, and ozone in the mesosphere, and temperature and nitric oxide density in the thermosphere with 2.5 km vertical resolution and 4.5 degree spatial resolution along the orbital path. The primary TONE measurements extend from 50 to 180 km and are fundamental to the science objectives of the TIMED mission. The broad capabilities of the TONE contribute significantly to the TIMED mission with a low-cost, highly reliable instrument based on a long heritage of space instruments built at the University of Colorado's Laboratory for Atmospheric and Space Physics. The TONE has heritage from spectrometers on Mariner 9, Pioneer Venus, the Solar Mesosphere Explorer, Galileo, and Cassini. [less ▲]

Comparison of 15N labelled forages and 15N incorporation into microbe for microbial estimation in nylon bag residues : influence on the effective N degradability.

in Giesecke, D. (Ed.) Proceedings of the Society of Nutrition Physiology (1994, September)

Mechanical loads on substation apparatuses

in Proceedings of the 6th ESCC (1994, September)

Short-circuit mechanical effects in substations are of particular concern. Their dynamic behaviour may sensibly influence the response of the structure to these dynamic loadings.

Usefulness of serum CK-MB determinations for assessing coronary artery reperfusion following thrombolytic therapy

Conference (1994, September)