etd AT Indian Institute of Science: Recent submissions
Now showing items 381-400 of 9468
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Dynamo action due to turbulence in a linear shear flow
Astrophysical systems such as the Sun, disc galaxies, galaxy clusters, and accretion discs possess ordered magnetic fields alongside random components. These magnetic fields survive for timescales much longer than diffusion ... -
GMRES acceleration of kinetic flux vector split (KFVS) Eulercodes
The present work is concerned with the acceleration of Euler codes using the Generalized Minimal Residual (GMRES) algorithm. The codes taken up for acceleration are 2D cellcentred, timemarching, finitevolume explicit Euler ... -
General procedure for evaluation of crack closure integral in problems of fracture mechanics
Fracturebased design procedures ensuring safety in the presence of cracks, which cannot be detected with hundred percent reliability by NonDestructive Testing (NDT) methods, have become essential for aerospace and many ... -
Study of some three dimensional effects in bolted joints
Joints are essential to connect parts of structural components and to interconnect subassemblies of largescale structural systems. Various types of structural joints are used in technological practice; among these, bolted ... -
Numerical simulation of a plane "Canonical" mixing layer using a vortex sheet model
A novel method for computing mixinglayer flow in the limit of infinite Reynolds number using a twodimensional vortexsheet technique is presented here. The method computes the evolution of the sheet by dividing it into ... -
Boundary restaint effects and correction ruler for two-dimensional separated flow past bodies.
It is now recognized that considerable uncertainties and inadequacies exist in methods for effecting blockage or boundaryrestraint corrections in wind and water tunnels. These factors have led to the search for alternative ... -
Energy balance growth
The problem of predicting residual strength of sheet metal construction is of considerable importance in damage-tolerant or fail-safe design of aircraft. The phenomenon of stable crack growth prior to fracture instability ... -
Study of mean velocity profiles in three-dimensional incompressible turbulent boundary layers
This thesis is concerned with the description of mean velocity profiles in three-dimensional incompressible turbulent boundary layers. The principal features of the study are an examination of the Preston tube technique ... -
Understanding the role of the RECQL5 helicase in regulating homologous recombination during DNA replication and genome maintenance
Faithful genome duplication is essential for maintaining genomic integrity and cell viability. During each cell cycle, the DNA replication machinery must accurately duplicate the genome. However, replication forks frequently ... -
A Scalable, Physics-Based Compact Model for Nano-Scale STI-Bounded SCRs in ESD Protection Applications
Electrostatic Discharge (ESD) reliability has emerged as a critical challenge in modern Integrated Circuits (ICs), especially as technology scaling pushes devices into nanoscale regimes with heightened sensitivity to ... -
Microwave synthesis and consolidation of advanced ceramics and ceramic composites
Advanced ceramics constitute an important class of materials. There exists today a wide spectrum of electrical, optical, magnetic and structural applications for advanced ceramics. Structural ceramics are employed in ... -
Morphological and biochemical studies on some yeasts and fungi
The morphological and biochemical studies of the penicillin producing fungi are described; single spore isolations have been made, methods of assay of the antibiotic are described. An attempt is made to correlate the ... -
Polarization rotation properties of twisted uniaxial anisotropic medium
In certain microwave applications, it is required to rotate the plane of polarization of a linearly polarized wave or beam by some desired angle relative to a fixed antenna or waveguide feed. Hence we study Polarization ... -
New approaches to improved detection and tracking performance in radars
The purpose of a Track While Scan (TWS) radar system is to detect, locate and track the various targets under its surveillance in the presence of interfering echoes. In the conventional approaches, the two basic functions ... -
Spectroscopic studies on polymerized and doped fullerenes and pressure induced phase transition in BaTiO3
In conclusion, we have observed pressure induced polymerization in the case of C but not in C . This calls for detailed theoretical analysis, incorporating the changes in electronic structure with the application of ... -
Bulk and thin growth of pure and substitued indium antimonide for infrared detector applications
InSb single crystals were grown by the vertical and horizontal Bridgman techniques. About 81 experimental runs were carried out altogether (for 8 mm, 10 mm and 20 mm diameter InSb crystals). Among them, as many as 47 runs ... -
Investigations of electroporation physics using optically transparent polymer devices and molecular dynamics simulation
New technologies have emerged in the medical field over the last decade to treat problems such as cancer and tumors. Electroporation is one such technique that has been extensively used in electrochemotherapy, drug delivery, ... -
Topics in amine chemistry
The thesis entitled “Topics in Amine Chemistry” is in three parts-A, B and C-as well as an Appendix. Part A describes, in two chapters, the development of an alternative to Gabriel’s amine synthesis based on the chemistry ... -
Utility of microbes in organic synthesis : (i) Selective transformations of acyclic terpenes and (ii) Purification and characteriation of a novel secondary alchohol dehydrogenase
Exploration of microbes in carrying out transformations of natural products has been an important and fascinating method in synthetic organic chemistry. Microbes offer the opportunity to effect selective transformations-a ...