etd AT Indian Institute of Science: Recent submissions
Now showing items 1461-1480 of 9466
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Studies on wavefront estimation and refraction corrected image reconstruction in optical tomography
In this thesis we report the development of two experimental phase measurement techniques for application in optical tomography and the modifications of the existing inversion algorithms for reconstructing the refractive ... -
System development for a fourier transform ion cyclotron resonance mass spectrometer
Abstract not available -
Fast adaptive multipole-algorithm for scattering from inhomogeneous dielectric cylinders of arbitrary cross-section
The work reported in this thesis is concerned with the rapid solution of electromagnetic scattering problems involving inhomogeneous dielectric cylinders of arbitrary cross?section. In particular, attention is focused on ... -
Coaxial triggered vacum gap : switching and delay characteristics
Vacuum is an excellent insulator, albeit has a poorly defined intrinsic electric breakdown strength. Because of this, the ordinary vacuum gap with only two electrodes is unsuitable for switching applications. The electric ... -
Electrical breakdown and post breakdown studies in sodium vapour using coxial; cylilndrical electrode configuration
The advancing technology of power circuit breakers has led the way for the study of arcs in gas?filled as well as vacuum circuit breakers. The spectroscopic investigations of such arcs have clearly shown the presence of ... -
Pressure gradient flow electrical conduction in polar liquids
Polar liquids like nitro-, chloro- and bromobenzenes find possible applications in electrostatic generators, impulse voltmeters etc. In this work natural conduction in these liquids has been studied at electric fields of ... -
Electrical discharges in mercury vapour in a magnetic field
Langmuir probe method is applied to determine the n? and T? of a low-density, collisional plasma in mercury vapour under moderate magnetic field strengths. The charge density evaluated by Bohm's method and the orbital ... -
Studies on thermo-resistant bacilli
A beginning was made in this country in the systematic study of spore‑forming bacteria capable of growing at 55°C. Ninety‑five odd isolates were obtained from sources such as soils, water from hot springs, air, dust, and ... -
Some aspects of the origin and the structure of technical terms in science and literature
The thesis is a study of the origin and the structure of technical terms in literature, physics, chemistry, mathematics, and medicine. The study of origin includes not only the proportion of words and word-elements derived ... -
Learing automata algorithms for connectionist systems local and global convergence
Connectionist systems have been studied with much interest as models for the brain and also as systems which work in a parallel and distributed manner. These systems exhibit desirable properties such as learning capability ... -
Excitation dynamics in GaAs quantum wells
The dynamics of excitons is studied using time?resolved photoluminescence. We deduce experimentally, for the first time, the intrinsic homogeneous linewidth of free excitons in GaAs quantum wells. The scattering rate of ... -
Nonexponential decay of sound in rooms
(i) The above analysis of decay of sound in rectangular rooms under various boundary conditions shows that the overall decay is in general non?exponential because the normal modes corresponding to different angles of ... -
Studies on the role of spatial coherena in the lau phenomenon
The Laue effect is of fundamental importance in the domain of optical interference phenomena. In the Laue experiment, interference fringes are formed in the far field when an extended source illuminates two gratings placed ... -
Relative efficiencies of devanagari and tamil scripts for reading
This thesis is devoted primarily to some of the problems involved in reading with particular emphasis on Devanagari and Tamil scripts. Scripts are considered as codes and their performance examined on the basis of information ... -
Studies on drop formation at conical and capillary tips
Despite the role of drops being recognised in many metallurgical processes, surprisingly no significant progress has been made in this area. An understanding of the drop formation phenomenon is expected to give a better ... -
Electron spectroscopic studies of surface segregation and oxidation of Cu and Ni based alloys and low temperature preparation and characterization of intermetallics base on the system Fe-W-Mo
An overview of the surface studies on alloys reported in the literature and the objectives of the present investigationbave been presented in this chapter. Preparation and characterization of the various alloys studied ...