Search results for "domes"
showing 10 items of 812 documents
Dip Phenomenon in High-Curved Turbulent Flows and Application of Entropy Theory
2018
The estimation of velocity profile in turbulent open channels is a difficult task due to the significant effects of the secondary flow. The present paper investigates the mechanism of the velocity-dip phenomenon, whereby the location of the maximum velocity appears to be below the free surface. Previous studies conducted in straight channels relate the mechanism of the velocity-dip phenomenon to secondary flow induced by anisotropy of turbulence. This work focuses on high-curved channels where the secondary motion, which is also induced by the channel’s curvature, evolves along the bend. The width-to-depth ratio, B/h, is one of the most important parameters that are affecting the secondary …
Food supplementation reveals constraints and adaptability of egg quality in the magpie Pica pica
2015
Differences in the deposition of limited maternal resources to eggs can reflect the optimal allocation to manipulate offspring phenotype, or constraints caused by maternal condition. We examined multiple maternal substances transferred to eggs in the magpie Pica pica to test the hypothesis that certain substances represent constraint and some optimal allocation. We did this by supplementary feeding magpies prior to egg-laying and then comparing the effect of food on maternal substances in conjunction with laying order relative to a control group. Certain substances such as carotenoids, immunoglobulins and avidin responded positively to food supplementation, whereas others, such as testoste…
The global economic crisis as a critical Juncture? The crisis's impact on migration movements and policies in Europe and the US
2016
The current global economic crisis has resulted in the strongest recession in the Organisation for Economic Cooperation and Development (OECD) countries since the Great Depression in the early 1930s and the 1970s oil shocks. This special issue sets out to explore how the most recent economic crisis impacted immigration and immigration-related policy in the United States of America and in European countries that are part of the OECD. The crisis of the late 2000s was offset by the collapse of the subprime US housing market, destabilising the financial system and leading to a sovereign debt crisis. The shock was marked by a “sudden […] deterioration of most, or all, key macroeconomic indicator…
Contribution des pollinisateurs dans la production de colza et de tournesol en zone atelier « Plaine et Val de Sèvre »
2018
Insect pollination is essential for over 70% of crops around the world. However, the contribution of pollinators to crop production and the insects involved in crop pollination have rarely been studied. Moreover, assessments of pollinator contributions have mostly been conducted on a small scale or under simplified conditions, which do not represent the real contributions at the field scale and do not take into account possible interactions between pollinators and farming practices. The aim of this study is to quantify directly under field conditions, the contribution of pollinators in two crops frequently cultivated in Europe: oilseed rape and sunflower. Estimations are realized both at th…
Recherche de critères phénotypiques et moléculaires discriminants des différentes espèces et sous-espèces du genre Pisum
2014
The Pisum genus presents a large genetic diversity, that makers difficult its taxonomic classification. The Center for Grain Legumes Genetic Resources holds 1800 pea accessions. Some of them are lacking passport data. Previous genotyping studies have identified SNP markers specific to wild Pisum pools. The main aim of my work was to conceive simple criteria in order to classify the unknown genotypes. Towards this goal, plants have been observed at the phenotypic level and their DNA were extracted for their characterisation using discriminating SNP markers. Furthermore, candidate genes of domestication were sequenced. Our results clearly showed distinctive traits between the P. sativum and P…
Contribution à la domestication de l'arganier pour la production de l'huile
2007
A survey conducted in 5 sites in the argan tree forest showed that argan oil represents an important part of the users' incomes. Nut-breaking is the most time-consuming and tedious step for the women involved in oil production. In 3 sites, the women were capable of distinguishing between those trees that yield nuts easy to break and trees yielding nuts difficult to break. These trees were named F and D, respectively. In each site, fruits were harvested from trees identified as F or D by the users, or at random. Those fruits were characterized by a set of measurements, including the force needed to break the nuts. Our measurements pointed out that the nuts harvested from F trees require a lo…
Religion et sacrifices d'animaux
2006
En Gaule, la plupart des lieux de culte recèlent des dépôts d'ossements qui constituent une de nos principales sources sur les sacrifices animaux. La restitution de ces pratiques est une entreprise dont la réussite dépend de circonstances très particulières, voire exceptionnelles, tenant à la nature des vestiges, aux modalités de leur enfouissement et de leur séjour en terre, mais aussi aux conditions de fouille. L'enquête passe par la collecte de tous les indices disponibles, l'analyse visant à préciser l'identité de l'animal, puis le traitement qu'il a subi, de sa sélection au sein du cheptel aux diverses pratiques dont il a pu faire l'objet dans le sanctuaire. On dispose pour cela d'une …
Habitat et circulation à partir du milieu du Ier s. p.C.
2012
International audience
La langue affrontée : voix intimes des domestiques dans The Cattle Killing de John Edgar Wideman
2017
The Cattle Killing traces the path a young Black itinerant preacher – a former slave reduced to vagrancy in plague-ridden 1793 Philadelphia. During his travels, he encounters Liam and Mrs. Stubbs, a Black man and a white woman, both former servants who have come from England where Liam was indentured to painter George Stubbs while his wife was Stubbs’ maid. They came to America in hope of a better life that would save them from ambiant racism. The preacher also meets Kathryn, a black woman serving the wife of a famous Abolitionnist, a Founding Father and enlightened humanist. Kathryn works as an amanuensis for her blind mistress and writes a diary the latter dictates. Yet the servant surrep…