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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 21 to 30 of 384 (0.024 seconds)Spelling suggestions: "subject:"cosmicrays"" "subject:"cosmicas""
| 21 |
The absolute intensities of cosmic-ray muon江鳳鸞, Kong, Fung-luen, Doreen. January 1976 (has links)
published_or_final_version / Physics / Master / Master of Philosophy
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| 22 |
The radio spectra and cosmological evolution of extragalactic radio sourcesPeacock, J. A. January 1981 (has links)
No description available.
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| 23 |
COSMIC-RAY MODIFIED STELLAR WINDS (ACCELERATION, MODULATION, DIFFUSION, TRANSONIC SOLUTION).KO, CHUNG-MING. January 1986 (has links)
A two fluid hydrodynamical model describing the modification of a stellar wind flow due to its interaction with galactic cosmic-rays is investigated. The two fluids consist of the thermal stellar wind gas and the galactic cosmic-rays. A polytropic one fluid model is used to describe the stellar wind gas, and the cosmic-rays modify the wind via their pressure gradient. The cosmic-rays are considered to be a hot low density gas of negligible mass flux, but with a significant pressure and energy flux compared to the thermal gas. The equations used are essentially those employed in two fluid hydrodynamical models of cosmic-ray shock acceleration by the first order Fermi mechanism, but suitably modified to apply in a spherical geometry and including the effects of gravity on the flow. The stellar wind consists of a transonic flow with a termination shock, and subsonic flow outside the shock. The model shows the deceleration of the wind upstream of the shock by the positive galactic cosmic-ray pressure gradient. The dissertation first discusses the fluid polytropic stellar winds and how to insert shocks in the flow. The hydrodynamical equations governing cosmic-ray modified winds are then introduced followed by a discussion of the physics of the interaction between the thermal stellar wind and the cosmic-rays. A description of the singularities of the equations is also presented. The system of equations is first solved by a finite difference method in the test particle approximation in which the cosmic-rays do not modify the flow, with appropriate boundary conditions applied at infinity, at the wind termination shock, and at the star. A perturbation scheme to determine the modification of the wind by the cosmic-rays is then developed. This scheme applies when the modification of the wind by the cosmic-rays is sufficiently small. Finally a numerical iteration is employed to exactly solve the equations. This latter method has the advantage that it can be applied when there is a considerable modification of the wind by the cosmic-rays.
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| 24 |
Spectral studies of cosmic x-ray sourcesBlissett, R. J. January 1980 (has links)
No description available.
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| 25 |
A search for high transverse momentum subcores in cosmic ray air showersFoster, J. M. January 1982 (has links)
No description available.
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| 26 |
A search for ultra high energy gamma ray sources from the South PoleSmith, Nigel James Telfer January 1990 (has links)
No description available.
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| 27 |
Investigation of the muon component of EAS initiated by primary radiation from Hercules X-1Barley, Steven Keith January 1990 (has links)
No description available.
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| 28 |
A study of the muon content of EAS initiated by the UHE gamma-ray emission from Cygnus X-3Edwards, Peter J. January 1990 (has links)
No description available.
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| 29 |
A search for diffuse and point source emission of UHE gamma rays using muon content selected EASTummey, Steven Peter January 1993 (has links)
No description available.
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| 30 |
Analysis of hypervelocity impacts on the thermal blankets of the ultra heavy cosmic ray experiment from the long duration exposure facilityMullen, Steven January 1994 (has links)
No description available.
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