etd AT Indian Institute of Science: Recent submissions
Now showing items 61-80 of 7574
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Pulsed neclear magnetic resonance investigations of certain proton conductors
In conclusion, we have assembled a pulsed field gradient spin-echo NMR spectrometer by interfacing a home-built microprocessor-based pulsed programmer and data acquisition system with imported RF units and an electromagnet. ... -
Equilibrium and nonequilibrium dynamics of dense liquids
Dense liquids do many interesting things: they freeze into crystals, and sometimes get trapped into glassy states along the way. Their behaviour becomes more unusual when they are driven far away from equilibrium, for ... -
Phasons,topological defects and dynamics in incommensurate matter
In this thesis, we derive some physical consequences of the existence of a phason mode in incommensurate materials. We consider two main examples of such materials-quasicrystals and the incommensurate twist grain boundary ... -
Studies of the vibrational and magnetic properties of layered compounds
In this final and concluding chapter, we summarize the important observations presented in the previous chapters and discuss the scope of future work in the systems under study. The main points dealt with in this thesis ... -
Structure - reactivity correlations of photochemical & thermal reactions in the solid state
The thesis entitled "Structure-Reactivity Correlations of Photochemical and Thermal Reactions in the Solid State" has been divided into two parts. Part I deals mainly with studies on the role of steering groups such as ... -
Studies in stereochemistry
The thesis entitled “Studies in Stereochemistry” is divided into three parts: Part I This part describes attempts to understand the cause of the unusual conformational preference of cyclohexane-1,4-dione. It is divided ... -
Investigations in stereochemistry and synthetic chemistry
Part I Cycloaddition of acrylates (methyl acrylate and methyl methacrylate) to an unsymmetrically substituted cyclopentadienone of type 1a yields the regioisomeric products 2 and 3; the disubstituted product 4 is obtained ... -
Studies in ring-chain tautomerism Ph.D. Thesis
The thesis entitled “Studies in Ring-Chain Tautomerism” consists of three chapters: Chapter 1 This chapter presents a brief review of Ring-Chain Tautomerism. The implications of this phenomenon in some biological reactions ... -
Critical factors of corporate philanthropy, their impact on monetary contribution and attributes of corporate-choice of NPO
Introduction: Corporate Philanthropy is an under-researched area where research gaps indicate that studies are sparse on the influence of NPOs (Non-Profit Organizations) on corporate philanthropy and the integrative effect ... -
Technologies in telecommunication sector: an assessment with particular reference to telephones, teleprinters & switching eq. in India.
Telecommunication is recognised as one of the basic needs of modern society and also as a key determinant of the pace of economic development. In India, telecommunications are still at a primitive stage and their performance ... -
Experimental study of sudden expansion in pipe flow
An Experimental Study of Sudden Expansion in Pipe Flow Flow through a sudden expansion, though the simplest and perhaps the earliest problem of fluid flow separation, still leaves much to be understood. The sudden expansion ... -
Development and application of a new method for detection of structural equivalence in graphs
This thesis mainly concerns the isomorphism problem encountered in computerized structural synthesis of kinematic chains. The contributions of the thesis to the study of structural aspects of linkages are the following. 1. ... -
Holographic interferometric study of natural convective heat transfer in vertical rectangular enclosures
Natural convective flows, induced by buoyancy forces on the fluid, in rectangular enclosures are important in many engineering applications such as thermal insulation of buildings, double-glazed windows and in flat plate ... -
Numerical studies of some non-linear problems in fluid mechanics
The problem of flow around a circular cylinder has long attracted the attention of many research workers because of its many practical applications and exciting mathematical features. This thesis contains the results of ... -
Two dimensional modelling of annular two phase flow
A two-dimensional model for analyzing annular two-phase flow through tubular geometry, based on the solution of continuity, momentum, and energy equations, is presented. The numerical approach employed is an adaptation of ... -
Geometric modeliing using slice representation
The thesis addresses mainly two issues in geometric modeling, high-level modeling techniques and reconstruction. High-level modeling techniques essentially include boolean operations on objects with same as well as different ... -
Experimental studies on travelling bubble cavitatin noise
An effectively controlled uniform travelling bubble cavitation was made possible at almost all freestream conditions by seeding the flow with artificial nuclei generated by electrolysis within the boundary layer of three ...