Étude paléogénétique du cerf élaphe (Cervus elaphus) au cours de la transition Tardiglaciaire - Holocène ancien du Jura (15 000 – 6 000 BP) : relations entre changements morphologiques, environnementaux et génétiques

Master of advanced studies dissertation (2003)

The Late-Glacial - Holocene transition, around 13,000 to 8,000 years ago, is the world theatre of an ample climatic upsetting associated to a deep change of the landscapes. Around the rock-shelter of ... [more ▼]

The Late-Glacial - Holocene transition, around 13,000 to 8,000 years ago, is the world theatre of an ample climatic upsetting associated to a deep change of the landscapes. Around the rock-shelter of Rochedane, an archaeological site from the French Jura, the climate shifts from peri-glacial to temperate, open environment becomes progressively closed and the faunal assemblages are consequently strongly modified. In order to understand the evolutionary mechanisms implied and their different aspects, a multidisciplinary survey has been led on bones from Red Deer, Cervus elaphus, found in the shelter associated with remains of lithic industry and prehistoric art let by the hunters-gatherers during this unstable time. Isotopic geochemistry has already showed that during this period, the habitat and the diet of deers changed. Moreover, morphological studies is demonstrating that, in the same way, the size of deers seems to decrease. To complete both studies, a palaeogenetic approach was then developed to test two different alternative: do the deers found come from a single population that adapts to new ecological conditions or instead do they correspond to a succession of different populations depending on environmental conditions? The results obtained up to now do not allow to conclude between both hypotheses. However, it was demonstrated that it was possible to access authentic mitochondrial DNA sequences (control region, cytochrome b) from these prehistoric bones and to discriminate the deers of Rochedane to the individual level. Thus, this approach is promising in order to decipher in the future the possible ties between environmental, morphological and genetic changes. [less ▲]

Etude palynostratigraphique du Dévonien inférieur dans l'Ouest de l'Europe

in Memoirs of the Geological Survey of Belgium (1989), 27

Etude par la méthode des éléments finis d'un écoulement de stokes dans un canal à paroi crénelée

in Collection des Publications de la Faculté des Sciences Appliquées de l'Université de Liège (1974), 48

Following a brief review of HELMHOLTZ's principle and of the analogy relating KIRCHHOFF's plate bending theory and a STOKES flow, such a flow is analyzed in a channel presenting periodically crenelated ... [more ▼]

Following a brief review of HELMHOLTZ's principle and of the analogy relating KIRCHHOFF's plate bending theory and a STOKES flow, such a flow is analyzed in a channel presenting periodically crenelated cavities. The results show clearly that for sufficiently deep cavities vortices are generated even at very low REYNOLDS numbers. [less ▲]

Etude par mécanique moléculaire de l'influence des substituants sur la géométrie et la stabilité du cyclohexane

Master of advanced studies dissertation (1994)

L'étude par mécanique moléculaire de l'influence des substituants sur la géométrie et la stabilité du cyclohexane est présentée ici.

Etude par modélisation du pompage dans l’aquifère alluvial de la Meuse pour le refroidissement d’un futur bâtiment de bureaux (SPF Finances, Liège)

Report (2008)

Etude par radio-pistage des stratégies d’utilisation de l’espace par la truite commune (Salmo trutta L.) dans un petit cours d’eau des Ardennes belges.

Conference (1998, June)

Etude par spectrométrie de masse de l'Apparition des ions négatifs par Attachement Electronique Dissociatif dans des molécules polyatomiques.

in Bulletin de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. Sciences (1970), LVI(8), 788-817

The appearance of negative ions by dissociative electron attachment has been studied by electron impact on CH4, C2H2, C2H4 and C2H3X (X=F, Cl) using a sector field mass spectrometer. An interpretation has ... [more ▼]

The appearance of negative ions by dissociative electron attachment has been studied by electron impact on CH4, C2H2, C2H4 and C2H3X (X=F, Cl) using a sector field mass spectrometer. An interpretation has been attempted for the measured appearance potentials. The electronaffinity of C2 and C2H is found to be (3.3+/-0.3) eV and (2.3+/-0.2) eV respectively. Some evidence is brought for the existence of excited electronic states in polyatomic negative ions. [less ▲]

Etude par Spectrométrie de Masse des Mécanismes d'Apparition des Ions Négatifs dans le Méthane.

in Extrait du Bulletin de la Société Royale des Sciences de Liège (1966), 35(11-12), 764-777

The negative fragment ions appearing in methane have been investigated using a sector field mass spectrometer. By recording the ionzation efficiency curves of each ion it has been possible to determine ... [more ▼]

The negative fragment ions appearing in methane have been investigated using a sector field mass spectrometer. By recording the ionzation efficiency curves of each ion it has been possible to determine the appearance potentials for several processes. Interpretations of the mechanisms for these critical potentials have been attempted. [less ▲]

Etude par spectrométrie Mössbauer de la distribution du fer dans les fractions minéralogiques séparées de roches lunaires rapportées par Apollo 12

in Bulletin de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. Sciences (1971), 5e série, v. 4(LVII), 1204-1211

Etude paysagère de la commune de Clavier

Book - Société Nationale Terrienne (1979)