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Spectroscopic and catalytic properties of chromium(II) and vanadium(II)McGillivray, G. W. January 1988 (has links)
No description available.
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Structural studies on metal halides and related species using matrix isolation and molecular beam techniquesMillington, K. R. January 1987 (has links)
No description available.
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Superradiance from photodissociatively created systemsJaroszynski, D. A. January 1987 (has links)
No description available.
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Theoretical and semiempirical study of the A0+ state of NaI / by Won Kim.Kim, Won January 1999 (has links)
Bibliography: p. 174-183. / ix, 183 p. : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Aims to contribute to the understanding of the first excited electronic state of NaI / Thesis (Ph.D.)--University of Adelaide, Dept. of Physics and Mathematical Physics, 1999
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Theoretical and semiempirical study of the A0+ state of NaI /Kim, Won. January 1999 (has links) (PDF)
Thesis (Ph.D.) -- University of Adelaide, Dept. of Physics and Mathematical Physics, 1999. / Bibliography: p. 174-183.
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Theoretical and semiempirical study of the A0+ state of NaIKim, Won. January 1999 (has links) (PDF)
Bibliography: p. 174-183. Aims to contribute to the understanding of the first excited electronic state of NaI
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Investigation of lamp phenomena and lamp materialsDemirbas, Erhan January 1997 (has links)
No description available.
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The application of quantitative time-of-flight mass spectrometry to study certain tungston (VI) oxidehalide decomposition reactionsUpton, J. R. January 1987 (has links)
No description available.
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Elucidating the Occurrence of Acoustic Resonance in Metal Halide Lamps from the Aspect of Power HarmonicsLin, Long-sheng 10 August 2007 (has links)
This thesis investigates the relevance between the acoustic resonance and power harmonics on a metal halide lamp. First, a sinusoidal current ranging from 20 kHz to 400 kHz is used to drive a 70 W metal halide lamp. Second, a hybrid-current test circuit is designed to generate a current waveform consisting of a low-frequency square-wave and a high-frequency sinusoidal wave. Both of the frequency and the amplitude can be adjusted independently. The test lamp is deliberately driven at its acoustic-resonance eigen-frequencies to observe the effect of the power spectrum on the degree of the acoustic resonance.
The experimental results indicate that the occurrence of acoustic resonance is indeed affected by the DC level and related power harmonics. The power harmonic spectrum that elucidates the initiation of acoustic resonance is deduced from the observations. It is found that the power harmonics that excites acoustic resonance can be divided into three categories. The first is independent of the average lamp power; it excites acoustic resonance only if the magnitude of its power exceeds a specific level. The thresholds of power harmonics belong to the second category are proportional to their DC powers. One can also find those remaining power harmonics belong to the third category.
The power harmonic spectrum of the acoustic resonance is demonstrated by driving the test lamp with quasi-square-wave and triangle-wave currents. This work helps advance the understanding of the phenomena and mechanism of acoustic resonance in a metal halide lamp.
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Investigation on Single-Pulse Ignition for Metal Halide LampsZeng, Jian-Jhang 07 September 2010 (has links)
Conventionally, metal halide lamps were ignited by striking the lamp electrodes several times with high voltage pulses. Such a starting scenario causes uncomfortable light strobes to users. To solve this problem, this thesis attempts to ignite small-wattage metal halide lamps with a single pulse strike. At first, the forms of the high voltage pulses required for breaking down the electrodes are investigated. After being broken down, a continuous current is critical for sustaining the lamp arc. With conventional electronic ballasts, however, the lamp current tends to resonate to zero resulting in break of the lamp arc. This problem can be solved by adding an extra switch to remove the capacitor of the output filter during the ignition stage. An electronic ballast is designed and tested on 70 W metal halide lamps with an associated switch for single pulse striking. Experiments have demonstrated that the proposed ignition criteria can start up the lamps successfully with a single-pulse high voltage.
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