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Articles 121 - 126 of 126
Full-Text Articles in Physics
Aerosol Composition As A Function Of Particles Size, Y. I. A. Koleleni, R. Van Grieken
Aerosol Composition As A Function Of Particles Size, Y. I. A. Koleleni, R. Van Grieken
Tanzania Journal of Science
Analysis of air particulate matter for various particle diameters 0.25-0.5 mm: 0.5-1 mm; 1-2 mm; 2-4 mm; and 4-8 were performed to investigate the contribution of both fine and coarse particles in environmental content. The abundance in the highest percentage concentration relative to particle diameters has shown interesting diagonal pattern with most of the elements ranging within 0-2%; 0.20%; 20-40%; 40-70%: and 70-100% respectively for different particle sizes. For the lowest percentage concentration range it is within 0-20%. In general the sum of elemental concentration provides a significant important result as far as pollution studies are concerned.
Meteostat Wefax Image Data Acquisition From The Weather Satellite Receiver, A. J. Mwambela, A. Purvis
Meteostat Wefax Image Data Acquisition From The Weather Satellite Receiver, A. J. Mwambela, A. Purvis
Tanzania Journal of Science
This paper describe the development and implementation of satellite image data acquisition interface board using a programmable peripheral interface device, the intel 8255 PPI, to be used between a secondary data weather satellite receiver and an IBM PC. Brief details of both hardware and software design implementation, to transfer and store data are given.
On The Field-Induced Infra-Red Absorption Of Gaas, Frederick Ngawo Onyango
On The Field-Induced Infra-Red Absorption Of Gaas, Frederick Ngawo Onyango
Tanzania Journal of Science
A theoretical survey of electric field–induced effects on one-and two-phonon absorption of GaAs is presented. The eigen-values and hence eigen-vectors are calculated for an external field applied along [001] and dependence of electro–absorption on the direction of radiation polarization established.
Theoretical Evaluation Of Selective Radiation–Absorbing Surface, K.R. O’Shea
Theoretical Evaluation Of Selective Radiation–Absorbing Surface, K.R. O’Shea
Tanzania Journal of Science
An algol computer program is described, by means of which the spectral reflectivity for any angle of incidence may be calculated for a surface consisting of up to two thin absorbing films on a bulk substrate. The values of optical constant, n and k, for the materials used and also the thickness of the films, are the only data required. Calculated reflectivities have been shown to be consistent with experimental results.
Studies In Artificial Rain: Their Progress And Prospects, P. B. Vitta
Studies In Artificial Rain: Their Progress And Prospects, P. B. Vitta
Tanzania Journal of Science
The progress made by studies of the phenomenon of rain is reviewed. Several techniques for modifying clouds so as to accelerate rain-drop precipitation are described.
An Attempt To Control Boundary Layer Turbulence With Nonisotropic Compliant Walls, R. Grosskreutz
An Attempt To Control Boundary Layer Turbulence With Nonisotropic Compliant Walls, R. Grosskreutz
Tanzania Journal of Science
A review of turbulence production in boundary layers leads to a new approach to boundary layer control by means of nonisotropic compliant walls. Suitably constructed coatings were tested and demonstrate that the concept is basically valid.