Velukutty, K K; Dr.Wazir, Hasan Abdi(Cochin University of Science and Technology, February 15, 1982)
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Abstract:
An attempt is made by the researcher to establish a theory of discrete functions in the complex plane. Classical analysis q-basic theory, monodiffric theory, preholomorphic theory and q-analytic theory have been utilised to develop concepts like differentiation, integration and special functions.
Description:
Department of Mathematics and Statistics, Cochin University of Science & Technology
Paul, C M; Dr.Girijavallabhan, C P(Cochin University of Science And Technology, April , 1982)
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Abstract:
The major objective of the thesis is essentially to evolve and apply certain computational procedures to evaluate the structure and properties of some simple polyatomic molecules
making use of spectroscopic data available from the literature. It must be said that though there is dwindling interest in recent times in such analyses, there exists tremendous scope
and utility for attempting such calculations as the precision and reliability of'experimental techniques in spectroscopy have increased vastly due to enormous sophistication of the instruments used for these measurements. In the present thesis an attempt is made to extract maximum amount of information regarding the geometrical structure and interatmic forces of simple molecules from the experimental data on microwave and infrared spectra of
these molecules
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Department of physics, Cochin University of Science And Technology
Kuriakose, V C; Dr.Babu, Joseph K(Cochin University of Science And Technology, September , 1982)
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Abstract:
The thesis deals with certain quantum field systems exhibiting spontaneous symmetry breaking and their response to temperature. These models find application in diverse branches such as particle physics, solid state physics and non~linear optics. The nature of phase transition that these systems may undergo is also investigated. The thesis contains seven chapters. The first
chapter is introductory and gives a brief account of the various phenomena associated with spontaneous symmetry breaking. The chapter closes with anote on the effect of temperature on quantum field systems. In chapter 2, the spontaneous symmetry breaking phenomena are reviewed in more detail. Chapter 3, deals with the formulation of ordinary and generalised sine-Gordon field theories on a lattice and the study of the nature of phase transition occurring in these systems. In chapter 4, the effect of temperature on these models is studied, using the effective potential method. Chapter 5 is a continuation of this study for another model, viz, the
m6 model. The nature of phase transition is also studied. Chapters 5 and 6 constitute a report of the investigations on the behaviour of coupling constants under thermal excitation D1 $4 theory, scalar electrodynamics, abelian and non-abelian gauge theories
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Department of physics, Cochin University of Science And Technology
Joseph, K S; Dr.George, Joy(Cochin University of Science and Technology, 1983)
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Abstract:
In this thesis the preparation and properties of thin films of certain semiconducting sulphides (sulphides of tin, copper and indium) are reported. As single source evaporation does not yield satisfactory films of these compounds for a variety of reasons, reactive evaporation of the metal in a sulphur atmosphere has been used for film preparation. It was found that for each metal sulphide a stoichimetric interval of fluxes and substrate temperature exists for the formation of the compound in accordance with the analysis of Guenther. The first chapter of the thesis gives a resume of the basic principles of semiconductor physics relevant to the work reported here. In the second chapter is discussed in detail the reactive evaporation techniques like ordinary reactive evaporation, activated reactive evaporation and reactive ion plating. Third chapter deals with the experimental techniques used in this study for film preparation and characterization. In the next seven chapters is discussed the preparation and properties of the compound films studied. The last chapter gives a general theory of the formation of compound films in various deposition techniques in terms of the kinetic energy of the film forming particles. It must be mentioned here that this is of fundamental importance to thin film deposition and is virtually untouched in the literature
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Department of Physics, Cochin University of Science and Technology
Mercy, Jacob K; Dr.Wazir, Hasan Abdi(Cochin University of Science and Technology, 1983)
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Abstract:
There is a recent trend to describe physical
phenomena without the use of infinitesimals or infinites.
This has been accomplished replacing differential calculus
by the finite difference theory. Discrete function theory
was first introduced in l94l. This theory is concerned with
a study of functions defined on a discrete set of points in
the complex plane. The theory was extensively developed for
functions defined on a Gaussian lattice. In 1972 a very
suitable lattice H: {Ci qmxO,I qnyo), X0) 0, X3) 0,
O < q < l, m, n 5 Z} was found and discrete analytic function
theory was developed. Very recently some work has been done
in discrete monodiffric function theory for functions
defined on H.
The theory of pseudoanalytic functions is a
generalisation of the theory of analytic functions. When the
generator becomes the identity, ie., (l, i) the theory of
pseudoanalytic functions reduces to the theory of analytic
functions. Theugh the theory of pseudoanalytic functions
plays an important role in analysis, no discrete theory is
available in literature. This thesis is an attempt in that
direction. A discrete pseudoanalytic theory is derived for
functions defined on H.
Description:
Department Of Mathematics and Statistics, Cochin University of Science and Technology
Valsala Kumari, C K; Dr. Joy, George(Cochin University of Science and Technology, 1984)
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Abstract:
During the past few decades, a wide spread interest in the structural, optical, electrical and other physical properties of the transition metal dichalcogenide
layer compounds has evolved. The members of this family of compounds can be regarded as stronglybonded two dimensional chalcogen-metal-chalcogen layers
which are loosely coupled to one another by the weak van der Waal's forces. Because of this type of bonding, the crystals are easily cleavable along the basal plane and show highly anisotropic properties. This thesis contains the growth and the study of the physical properties of certain tin dichalcogenide
crystals (SnS2 and Snsea). Tin disulphide and tin diselenide crystallize in the hexagonal CdI2 type crystalstructure. This structure consists of layers of tin
atoms sandwiched between two layers of chalcogen atoms. Aitin atom is surrounded by six chalcogen atoms octahedrally. In the layers the atoms are held together by covalent bonding and in between the layers there is
van der Waal's bonding.
Description:
Department of Physics, Cochin University of Science and Technology