Validation of a Finite Element code to simulate the coupled problem of salt transport in groundwater

in Computer Techniques in Environmental Studies V, Proceedings of ENVIROSOFT'94 (1994)

Induced land subsidence near major river mouths; from Quaternary geology to coupled numerical models

in 7th International Association of Engineering Geology Congress (1994)

Using tracer tests and numerical simulations to assess protection zones in heterogeneous aquifer

in Proc. Int. Symp. on Impact of Industrial Activities on the Groundwater (1994)

A fuzzy approach to the definition of standardized visibility in fog.

in Applied Mathematics and Computation (1994), 61(2-3), 287-299

The problem of defining the physical concept of standardized visibility is addressed by means of a fuzzy logic approach. Assuming that several hypotheses hold, it is possible to evaluate a standardized ... [more ▼]

The problem of defining the physical concept of standardized visibility is addressed by means of a fuzzy logic approach. Assuming that several hypotheses hold, it is possible to evaluate a standardized visibility Vk (or meteorological visual range) as the ratio of a psychometric coefficient k and the extinction coefficient σ of the aerosol. The main disadvantage of this relationship due to Koschmieder stems from the fact that the meteorological visual range can be very different from visibility estimated by a human observer with normal sight. This is particularly true during fog extinction coefficient supplied by a transmissometer and the corresponding visibility evaluated by an expert. Calculations are performed according to two different approaches. First, a so-called fuzzy hyperbolic model based on a distance defined by Bardossy et al is presented, yielding a crisp (nonfuzzy) value of the coefficient k. Next, we use the multiplication of two fuzzy numbers, taken as triangular, to build an average fuzzy number k that accounts for the different values found in the literature. The defuzzification of k confirms the result obtained by the first approach. [less ▲]

La tour de la Brasserie Piedboeuf

in Paquet, Pierre; Cannella, Anne-Françoise; Warzée, Gaëtanne (Eds.) Le Patrimoine industriel en Wallonie (1994)

Les bureaux de la S.A. des ateliers de construction de la Meuse

in Paquet, Pierre; Cannella, Anne-Françoise; Warzée, Gaëtanne (Eds.) Le Patrimoine industriel en Wallonie (1994)

La Linière Saint-Léonard

in Paquet, Pierre; Cannella, Anne-Françoise; Warzée, Gaëtanne (Eds.) Le Patrimoine industriel en Wallonie (1994)

La Cour de justice des Communautés européennes au secours des Marocains handicapés - L'arrêt Yousfi, note sous C.J.C.E., 20 avril 1994

in Journal du Droit des Jeunes (1994), (137), 36-39

Selective gravitational microlensing and line profile variations in the BAL quasar H 1413+117

in Astronomy and Astrophysics (1993), 280

In order to interpret the spectral differences observed between the four images of the gravitationally lensed broad absorption line (BAL) quasar H 1413+117, we have investigated the effect on the line ... [more ▼]

In order to interpret the spectral differences observed between the four images of the gravitationally lensed broad absorption line (BAL) quasar H 1413+117, we have investigated the effect on the line profiles of the selective magnification of individual BAL clouds by gravitational microlenses. Since microlenses magnify both the selected cloud and the whole BAL region, this effect is only differential, and general constraints on its capability to produce spectral variations have been derived. Considering simple but realistic models for the microlenses, we find that the selective magnification of a relatively large optically thick BAL cloud can be at the origin of the spectral differences reported between the components of H 1413+117. However, a very precise configuration is needed: the magnified cloud must be at the border of the BAL region which must itself partially lie in a region of strong de-magnification. The fine tuning of the parameters mecessary to reproduce the observations either seriously questions this kind of interpretation or puts strong constraints on the lensing models. Another interpretation of the observed line profile differences in terms of effects due to microlensing is also briefly discussed. [less ▲]

Mediterranean small mammals and insular syndrome: biometrical study of the long tailes field mouse (Apodemus sylavticus) (Rodentia Muridae) of Corsica

in Bonner Zoologische Beiträge (1993), 44(3-4), 147-163

The presence in Corsica of a field mouse is well known. Several authors have noted some of its morphological peculiarities but it was only recently (1980) that the presence of A. sylvaticus was ... [more ▼]

The presence in Corsica of a field mouse is well known. Several authors have noted some of its morphological peculiarities but it was only recently (1980) that the presence of A. sylvaticus was establblished with certainty. However, this evidence is based on a check of a limited number of individuals originating from a single locality. In order to generalize these observations, we performed o biochemical test on six Corsican mice caught in three distinct localites and a morpho biometrical study of 491 skulls. The results show that A. sylvaticus is spread all over the island and that A. flavicollis is probably absent. No sexual dimorphism was found but strong spatial variations in the cranial measurements were ividenced. There are far less important between the various Corsican sub samples than between the insular and the continenecal mice. The evolutionary and adaptive significance of the increase in size of insular mice is discussed in relation to the theory of island biogeography and to the present knowledge on the history of the mammalian settlement of the island. [less ▲]