Influence des parametres de croissance de la vegetation sur le bilan energetique d'une serre.

in Bulletin des Recherches Agronomiques de Gembloux (1987), 22(3),

Faut-il subventionner les technologies nouvelles?

Report (1987)

La spectrometrie de masse appliquee a la determination de sequence de tres faibles quantites de peptides.

in Bulletin des Recherches Agronomiques de Gembloux (1987), 22(2),

Measurement of soil surfaces profiles with an optical displacement transducer.

in Proceedings, 9th International Conference of the International Society for Terrain Vehicle Systems, held in Barcelona, Spain, 31 August-4September 1987. Volume 1. (1987), 1

Microrelief of seedbeds after two different soil tillages were measured with an optical displacement transducer. Measurements were made after sowing and on two successive dates. A complete statistical ... [more ▼]

Microrelief of seedbeds after two different soil tillages were measured with an optical displacement transducer. Measurements were made after sowing and on two successive dates. A complete statistical analysis was obtained by means of power spectra and autocorrelation functions. The authors suggest using the absolute value of the slope of the tangent at the origin of the autocorrelation function with the aim of analysing the behaviour of small particles in the scope of soil degradation [less ▲]

Pour une meilleure valorisation du sang d'abattoirs en Wallonie

in Wallonie (1987), 14(80), 119-124

Physiological factors associated with the onset of sweating

in Japanese Journal of Physiology (The) (1987), 37(4), 699-714

The influence of esophageal (Tes) and skin temperature (Tsk) variations, body heat storage, and individual parameters on the initiation of sweating was investigated in 9 unacclimated subjects during ... [more ▼]

The influence of esophageal (Tes) and skin temperature (Tsk) variations, body heat storage, and individual parameters on the initiation of sweating was investigated in 9 unacclimated subjects during thermal transients induced by exercise (25, 50, or 75 W) and by a step change in ambient temperature from 28 degrees C to 23, 28, 36.5, 45, or 50 degrees C. Seventy-four onsets of sweating were observed during the exposures, the sweating delay averaging 3 min at 45 and 50 degrees C, 6 min at 36.5 degrees C, and 9.5 min at 28 degrees C. In warm conditions (36.5 to 50 degrees C), the onset of sweating could mainly be related both to the level of Tsk and its rate component, whereas in cooler conditions (28 and 23 degrees C), the onset of sweating could only be related to a positive rate of Tes variation, the Tsk level being low and steady. On the whole set of data, the Tes changes at the onset were inversely related to the Tsk changes. The cumulated heat storage at the onset of sweating was 37 kJ/m2 (S.D. 25). It varied not only among subjects (range: 11-66 kJ/m2) but also within subjects even when differences in thermal state prior to exercise were accounted for. Among the individual parameters investigated, the magnitude of the decrease in Tes observed in response to the start of exercise was found to have a significant effect on the sweating delay. The Tes decrease was inversely related to the subject's skinfold thickness, and in a given subject, inversely related to the preexercise Tsk. It is concluded that the results are in agreement with a summation model of internal and mean skin temperatures on the sweating drive but that they do not verify the hypothesis of a critical level of heat storage at the onset of sweating. [less ▲]

Une forme nouvelle de commerce : le commerce de seconde main. Premières observations au départ du cas de Liège

in Bulletin de la Société Géographique de Liège (1987), (22-23), 99-110

This paper constitutes, to our knowledge, the first geographical research on second hand trade. This study attempts to determine and explain the structural, sectoral and spatial characteristics of a new ... [more ▼]

This paper constitutes, to our knowledge, the first geographical research on second hand trade. This study attempts to determine and explain the structural, sectoral and spatial characteristics of a new form of trade which will, in all probability, develop in the near future. This work is based on a precise, on-site survey of sales points, logging their principal characteristics, as well as the privileged testimony of 18 specially chosen shopkeepers. Although limited to Liège, this analysis is more a consideration of second-hand trade and its methodological requirements than a case study. [less ▲]

Le commerce de détail à Visé aujourd'hui

in Notices visétoises (1987), (21), 117-149

Analysis of the structure and the location of retail trade based on a field survey

Geometry of the mass-outflows around broad absorption line QSOs and formation of the complex Ly-alpha + N V line profile

in Astronomy and Astrophysics (1987), 177

The possibility that the observed broad absorption line (BAL) profiles are formed in spherically symmetric atmospheres is investigated, and it is found that BAL and non-BAL QSOs form two distinct classes ... [more ▼]

The possibility that the observed broad absorption line (BAL) profiles are formed in spherically symmetric atmospheres is investigated, and it is found that BAL and non-BAL QSOs form two distinct classes of quasars. It is shown that the small residual intensity and large equivalent width noted for some absorption troughs may be reproduced by the resonance scattering of line photons across spherically symmetric BAL regions. N V emission strength is found to be higher in the spectrum of BAL QSOs than in that of non-BAL QSOs. Good agreement between theory and the observed attenuation of the Ly-alpha emission line, the observed enhancement of the N V emission strength, and the possible presence of a shoulderlike feature in the red wing of the N V emission profile is obtained. [less ▲]

ANOMALOUS ELECTRON HEAT-TRANSPORT DRIVEN BY LOW-FREQUENCY ELECTROMAGNETIC TURBULENCE

in Physical Review Letters (1987), 59(13), 1448-1451