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  • About
  • 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.
81

SIMULATION OF SPECTRAL RADIANCE OF A DYNAMIC INFRARED SOURCE

Strojnik, Marija January 1980 (has links)
An infrared source with spatially and temporally variable radiance is designed. It can be used to simulate any other infrared source simultaneously in two wavelength bands. The theoretical analysis of the real and simulator source is performed to define the design parameters. A series of the concepts are evaluated for their potential as infrared sources. A three-dimensional heat transfer computer program is used to predict the thermal behavior of the prototype glassy carbon waffle target. Tests are performed on this target which show that its thermal and radiation properties are in agreement with its predicted behavior. Glassy carbon waffle source is a good infrared radiator which can be used repeatedly at high temperatures. Measurements are described which show that the uniformity in the surface temperature can be maintained even when a scanning laser beam is used to deposit the energy on the target surface. The target surface is described analytically as a low pass filter. Its time constant is shown to depend on the target material and the temperature distribution in the target.
82

TESTING THE PREDICTIVE UTILITY OF SCENIC BEAUTY DESCRIPTION MODELS

Arthur, Louise Marie, 1949- January 1975 (has links)
No description available.
83

A novel laboratory apparatus for simulating isotropic oceanic turbulence at low reynolds number

Brathwaite, Aisha 05 1900 (has links)
No description available.
84

The thermal effect and fault tolerance on nanoscale devices : the quantum dot cellular automata (QCA)

Anduwan, Gabriel A. Y. January 2007 (has links)
The defects and fault tolerance study is essential in the QCA devices in order to know its characteristics. Knowing the characteristics, one can understand the flow of information in a QCA system with and without manufacturing and operational defects. The manufacturing defects could be at device level or cell level. At the device level, the cell could be rotated, displaced vertically or horizontally, the cell could be missing or the size of the cell could be different. At the cell level, there could be a missing dot, dot could be displaced from its position or the size of the dots could be different. The operational defects are due to its surrounding, such as temperature or stray charge. Each of these defects and fault tolerances can be studies in detail in order to find the optimum working conditions where the information can be safely transmitted to the appropriate locations in the device.The theoretical studies have shown that at absolute temperature and without any defect, the QCA devices are operational. But it is almost impossible to manufacture a perfect or defect free device, and also it is impractical to think about operating a system at absolute zero temperature environment.Therefore, it is important to investigate the fault tolerant properties with defects and higher temperatures to see how far the QCA device can operate safely. Many studies have been done to investigate the fault tolerant properties in QCA devices. However, these studies have not completely exhausted the study of defects and temperature effects. In this study, the dot displacement and missing dots with temperature effects are investigated for the basic QCA devices and a Full Adder. In order to study fault tolerant properties, the existing theoretical model and computer simulation programs have been expanded and used. The defect characteristics have been simulated using normal distribution. / Department of Physics and Astronomy
85

Modelling and simulation of Brunswick mining grinding circuit

Del Villar, René January 1985 (has links)
No description available.
86

On the incorporation of nonnumeric information into the estimation of economic relationships in the presence of multicollinearity

Parandvash, G. Hossein 24 July 1987 (has links)
Graduation date: 1988
87

A systems approach utilizing simulation modeling for the management of the lawn armyworm, Spodoptera mauritia acronyctoides (Guenée) (Lepidoptera : Noctuidae), with its nuclear polyhedrosis virus

Chon, Tae Soo January 1982 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 1982. / Bibliography: leaves 242-245. / Microfiche. / xiii, 245 leaves, bound ill. 29 cm
88

Fry's dynamic disk roadway lighting simulator

Anantha, Balakrishnan N January 1982 (has links)
Typescript (photocopy).
89

A reliability/availability simulation model for evaluating network systems.

Jenkins, Raymond John January 1992 (has links)
A project report submitted to the Faculty of Engineering, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science in Engineering. / The simulator uses the Monte Carlo technique to quickly and accurately estimate the reliability and availability of complex network systems, Non-exponential failure and repair distributions are included in the model, as is standby redundancy and K out of N active redundancy. The program is easy to use and will work on a large variety of computers and FORTRAN compilers. Some knowledge of FORTRAN is required to program the simulator for each reliability network, The simulator is limited to the analysis of network systems, i.e, those systems whose logic can be fully represented by a reliability block diagram. The applicability of the model was demonstrated by the analysis of numerous systems in the aerospace and industrial environments. Validation of the model was accomplished by comparing these results with analytically determined values, or those from AMIR and SPAR where an analytic solution was impossible. / Andrew Chakane 2018
90

Modelling and simulation of Brunswick mining grinding circuit

Del Villar, René January 1985 (has links)
No description available.

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