نتایج جستجو برای: cosmic expansion
تعداد نتایج: 171725 فیلتر نتایج به سال:
Since this is the first contribution to this meeting which is mainly involved in cosmology, I would like to put it into its cosmological perspective: In the standard model of cosmology we assume that the universe is homogeneous and isotropic on large enough scales. This assumption, originally probably made just by reasons of simplicity, leads to a so called Friedmann Lemâıtre universe which exp...
The catalogue of Somatic Mutations in Cancer (COSMIC) (http://www.sanger.ac.uk/cosmic/) is the largest public resource for information on somatically acquired mutations in human cancer and is available freely without restrictions. Currently (v43, August 2009), COSMIC contains details of 1.5-million experiments performed through 13,423 genes in almost 370,000 tumours, describing over 90,000 indi...
The heat expansion of a star-like cosmic object, induced by the cosmo-logical bremsheat production within a moving body, that was predicted by the Projective Unified Field Theory of the author, is approximately treated. The difference to planet-like bodies investigated previously arises from another material constitution.The exponential-like expansion law is applied to a model with numerical va...
The quadrupole power of cosmic microwave background (CMB) temperature anisotropies seen in the WMAP data is puzzlingly low. In this paper we demonstrate that Minimum Variance Optimization (MVO), a technique used by many authors (including the WMAP science team) to separate the CMB from contaminating foregrounds, has the effect of forcing the extracted CMB map to have zero statistical correlatio...
We have studied the impact of cosmic-ray acceleration in SNR on the spectra of cosmic-ray nuclei in the Galaxy using a series expansion of the propagation equation, which allows us to use analytical solutions for part of the problem and an efficient numerical treatment of the remaining equations and thus accurately describes the cosmic-ray propagation on small scales around their sources in thr...
The general world model for homogeneous and isotropic universe has been proposed. For this purpose, we introduce a global and fiducial system of reference (world reference frame) constructed on a 4 + 1 Minkowski space-time that is embedding the universe, and define the line element as the separation between two neighboring events that are distinct in space and time, as viewed in the world refer...
Based on a conjecture about the diffusion tensor of relativistic particles perpendicular to the magnetic field at a shock, and considering particle drifts, we develop a theory to account for the cosmic ray spectrum between 1 GeV and 10 GeV. The essential assumption is that the mean free path perpendicular to the magnetic field is independent of energy and has the scale of the thickness of the s...
Reexamination of general relativistic experimental results shows the universe is governed by Einstein’s static-spacetime general relativity instead of Friedmann-Lemaitre expanding-spacetime general relativity. The absence of expansion redshifts in a static-spacetime universe suggests a reevaluation of the present cosmology is needed. For many decades the Friedmann-Lemaitre spacetime expansion r...
abstractbackground: there are relatively rich uranium mines in regions of saghand and bafgh in yazd province. this survey was carried out to provide a map of ambient gamma radiation of yazd province and the probable effects of the existence of these mines on background radiation dose rates.materials and methods: the measurements of the outdoor and indoor–environmental exposures (including cosmi...
The fact that the ΛCDM model fits the observations does not necessarily imply the physical existence of ‘dark energy’. Dropping the assumption that cold dark matter (CDM) is a perfect fluid opens the possibility to fit the data without dark energy. For imperfect CDM, negative bulk pressure is favoured by thermodynamical arguments and might drive the cosmic acceleration. The coincidence between ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید