198,149 research outputs found
Objets antiques découverts par M. Mouret dans la nécropole d'Ensérune et dessinés par Mlle J. Evrard
No full textReinach Salomon, Pottier Edmond. Objets antiques découverts par M. Mouret dans la nécropole d'Ensérune et dessinés par Mlle J. Evrard. In: Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres, 62ᵉ année, N. 1, 1918. pp. 95-99
La morale économique des grandes religions. Essais de sociologie religieuse comparée : Introduction (Traduction de M. Rubel et L. Evrard, avant-propos et notes de M. Rubel)
No full textWeber Max. La morale économique des grandes religions. Essais de sociologie religieuse comparée : Introduction (Traduction de M. Rubel et L. Evrard, avant-propos et notes de M. Rubel). In: Archives de sociologie des religions, n°9, 1960. pp. 3-30
Models of hierarchical: galaxy formation
No full textA semi-analytic galaxy formation model, N-body GALFORM, is developed which uses outputs from an N-body simulation to follow the merger histories of dark matter halos and treats baryonic processes using the semi-analytic model of Cole et al. We find that, apart from limited mass resolution, the only significant differences between this model and the Monte-Carlo based model of Cole et al. are due to known inaccuracies in the distribution of halo progenitor masses in the Monte-Carlo method. N-body GALFORM is used to compare Smooth Particle Hydrodynamics (SPH) and semi-analytic calculations of radiative cooling in the absence of star formation. We consider two cases: firstly, a simulation of a representative volume of the Universe with relatively poor mass resolution, and, secondly, a high resolution simulation of the formation of a single galaxy. We find good agreement between the models in terms of the mass of gas which cools in each halo, the masses of individual galaxies, and the spatial distribution of the galaxies. The semi-analytic model is then compared with a realistic, high-resolution galaxy simulation which includes prescriptions for star formation and feedback. A semi-analytic model without feedback is found to best reproduce the masses of the simulated galaxy and its progenitors. This model is used to populate a large volume with semi-analytic galaxies. The resulting luminosity function has an order of magnitude too many galaxies at high and low luminosities. We conclude that, while SPH and semi-analytic cooling calculations are largely consistent and therefore likely to be reasonably reliable, current numerical models of galaxy formation still contain major uncertainties due to the treatment of feedback, which will lead them to predict very different galaxy populations. Further work is required to find simulation algorithms which can simultaneously produce realistic individual galaxies and a population with reasonable statistical properties
Electromagnetic interactions in the neutron-proton system
No full textUn potentiel effectif décrivant les interactions électromagnétiques dans le système neutron-proton est construit en vue d'une étude systématique de l'importance des corrections électromagnétiques dans les analyses de haute précision des mesures expérimentales concernant ce système aux basses énergies. On propose des représentations analytiques simples des intégrales définissant ce potentiel, qui permettent une grande souplesse d'emploi tout en réduisant considérablement les temps de calcul. Certains aspects des évaluations numériques des grandeurs observables rendus plus délicats par l'introduction de ce potentiel, à côté des forces nucléaires, dans l'équation de Schrödinger, sont également examinés tant pour les propriétés de diffusion que pour la description du deuton.Naisse Jacques P., Evrard M. Electromagnetic interactions in the neutron-proton system. In: Bulletin de la Classe des sciences, tome 64, 1978. pp. 669-688
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Probing the gravitational potential of a nearby lensing cluster Abell 2104
No full textThe cluster Abell 2104 is one of the lowest redshift clusters (z = 0.153) known to have a gravitational lensing arc. We present detailed analysis of the cluster properties such as the gravitational potential using the X-ray data from ROSAT (HRI) and ASCA, as well as optical imaging and spectroscopic data from the CFHT. The cluster is highly luminous in the X-ray with a bolometric luminosity of Lx↑ 3 × 1045 ergs s−1 and a high gas temperature of ↑ 10.4 keV. The X-ray emission extending out to at least a radius of 1.46 Mpc, displays significant substructure. The total mass deduced from the X-ray data under the assumption of hydrostatic equilibrium and isothermal gas, is found to beMtot(r < 1.46Mpc) ↑ (8.0±0.8)×1014M. The gas fraction within a radius of 1.46 Mpc is ↑ 5−10%. The cluster galaxy velocity distribution has a dispersion of 1200 ± 200 km s−1 with no obvious evidence for substructure. The total mass within 1.46 Mpc, deduced from Jean’s equation using the observed galaxy number density distribution and velocity dispersion, is found to be ↑ 6.8 × 1014M to ↑ 2.6 × 1015M marginally consistent with the X-ray deduced total mass
Scaling Relation in Two Situations of Extreme Mergers
No full textClusters of galaxies are known to be dynamically active systems, yet X-ray studies of the low-redshift population exhibit tight scaling laws. In this work, we extend previous studies of this apparent paradox using numerical simulations of two extreme merger cases, one is a high Mach number (above 2.5) satellite merger similar to the "bullet cluster" and the other is a merger of nearly equal-mass progenitors. Creating X-ray images densely sampled in time, we construct T X , M gas , and Y X measures within R 500 and compare to the calibrations of Kravtsov et al. We find that these extreme merger cases respect the scaling relations, for both intrinsic measures and for measures derived from appropriately masked, synthetic Chandra X-ray images. The masking procedure plays a critical role in the X-ray temperature calculation, while it is irrelevant in the X-ray gas mass derivation. Miscentering up to 100 kpc does not influence the result. The observationally determined radius R 500 might conduce to systematic shifts in M gas and Y X , which increases the total mass scatter.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90822/1/0004-637X_729_1_45.pd
Lettres a Louis XVIII, Roi de France et de Navarre, sur le salut de la monarchie francoise [electronic resource].
No full textThe first of a series of six letters signed at end: D.L., i.e. Evrard de L'Isle, each published separately.Price from imprint: Prix, six sous. (entered at Stationers Hall.NCElectronic reproduction.English Short Title Catalog,Reproduction of original from British Library
Facing the growing problem of the electric power consumption in Egyptian residential building using building performance simulation program
No full textEgypt has been experiencing recurrent power cuts especially at the summer, with the problem being made worse by the extra demands placed on the electrical grid by the advent of the holy month of Ramadan. Electricity shortages are now a problem in Cairo, Alexandria, Sohag, Qena, Luxor, Aswan, and Nubia, as well as in the Nile Delta governorates of Beheira and Qalioubiya. The aim of this study is to develop a model for the Egyptian residential building using Building Performance Simulation Program and make sensitivity analysis on some variables effecting the electric power consumption in order to help faceting the growing problem in Egypt. The model was created using the IES-VE 2012 (Integrated Environmental Solution ). The simulation model was verified against the survey data for the Egyptian apartment and same model simulated using energy Plus simulation tool. The results of the program describing different situations for energy using profile for the air conditions, lighting and equipments in respect to building layout and construction climate and pattern of use. This model can be used in the future to help in reducing the electric power consumption in the residential building
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
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