etd AT Indian Institute of Science: Recent submissions
Now showing items 2781-2800 of 6965
-
Integration of AlGaN with (111) Si Substrate by MOCVD
AlGaN is an important semiconductor material for electronic and optoelectronic applications. The change in composition of AlGaN (AlN to GaN) provides a range of bandgaps extending from 6.01 eV, far ultraviolet, to 3.4 ... -
III- Nitride Thin Films and Nanostructures on Si(111) by Plasma Assisted Molecular Beam Epitaxy
This thesis focuses on studying heterostructures of GaN, Silicon and AlN. GaN nanostructures are grown on bare Si (111) with and without a GaN buffer layer and GaN film was grown on an AlN layer. Apart from the material ... -
Novel Phenomena Associated With Giant Tetragonality in the Ferroelectric BiFeO3-PbTiO3 System
The multiferroic perovskite solid solution xBiFeO3-(1-x)PbTiO3 (BF-PT) exhibits very unique features such as giant tetragonality (c/a ~ 1.19), coexistence of ferroelectric and magnetic order (in certain composition range) ... -
Organic-Inorganic Hybrid Photovoltaics : Interface Engineering, Fabrication and Characterization
In the past few decades the field of organic electronics particularly organics photovoltaic (OPVs) find wide interest among researchers. It finds many advantages such as light weight, low temperature fabrication requirements, ... -
Computation of Sparse Representations of High Dimensional Time Series Data and Experimental Applications
Obtaining a sparse representation of high dimensional data is often the first step towards its further analysis. Conventional Vector Autoregressive (VAR) modelling methods applied to such data results in noisy, non-sparse ... -
Design, Fabrication and Development of Polymer Microcantilever for Flow Rate Measurement and Thermal Actuation
Design, fabrication and development of polymer microcantilever for flow rate measurement and thermal actuation Research Supervisors: Prof. K. Rajanna and Dr. G. R. Jayanth Microcantilevers are sensitive micromechanical ... -
High-rate MSR Codes, Interior-point Regenerating Codes, and Codes with Hierarchical Locality
Given the breath-taking pace at which the amount of data being generated on a daily basis is growing, and the keen desire to extract information from this data, there is strong interest within the storage industry, at ... -
A Probing System for Dynamic Mode Atomic Force Microscopy Based on Specialized Probes
The dynamic mode atomic force microscope (AFM) is a versatile tool that uses a resonantly excited micro-cantilever probe to obtain a sample’s topography and to characterize its material properties. While a number of useful ... -
Design and Development of a Novel Solar Thermal Receiver
One of the most widely used solar collectors for process heating and large scale electricity generation is the parabolic trough collector (PTC), in which a tube placed at the focus of the parabola receives concentrated ... -
Vertical Structure of Convective Clouds Using the TRMM PR Data
Very small fractional area (0.1%) occupied by the cumulonimbus (Cb) clouds belies their importance in Earths hydrological cycle and climate. For example, Riehl and Malkus (1958) estimated that the vertical transport of ... -
Structural Characterization of Biological Macromolecules by Random Conical Tilt Pair Experiments
Structural biology deals with determining the structure of biological macromolecules especially proteins, DNA, RNA. The conformational changes in the structure of a macromolecule helps to decipher its function. This ... -
Combustion Synthesized Cobalt Catalysts for Liquid Fuel Generation Via Fischer Tropsch Reaction
This thesis is concerned with studies on the conversion of syngas to liquid hydrocarbons. A major part of the effort is aimed at synthesising the catalyst and use of it in a speci cally designed high pressure-high ... -
Understanding the Role of Lsm Domain in Translation Repression Activity of RGG-motif Containing Protein Scd6
Control of gene expression in eukaryotes is regulated at various steps such as transcription, translation and protein degradation. Translation repression of mRNA regulates protein levels and maintains cell homeostasis. ... -
Multiscale Simulations in Multiphase Flows
Matter at small scales is not a continuum. Whenever we are dealing with phenomena which have disparate time and length scales, we have to rely on multiscale modelling approach in order to capture the complete physics. A ... -
Elucidating Deregulated Novel Pathways in Glioma through Genetic and Epigenetic Approaches
Malignancy of glial cells is termed as glioma. Gliomas comprise of thirty percent of all tumors of the central nervous system (CNS) and eighty percent of malignant brain tumors (Goodenberger and Jenkins, 2012). Astrocytoma, ... -
Structural and Biochemical Studies on Mycobacterial Uracil- DNA N-glycosylase and Mut T1
Maintenance of the genomic integrity of the cell is crucial for the survival and successful propagation of an organism. However, this integrity is under continuous threat from DNA-damaging agents. In addition, errors in ... -
Molecular Insights into the Structure and Function of Pepper Vein Banding Virus Encoded Proteins and Endocytic Uptake Pathway of Virus-like Particles into Mammalian Cells
Viruses are major pathogenic agents that cause a variety of diseases in all living systems. Since their first isolation in 1892 by Dimitrii Ivanovsky, methods of their diagnosis and control, their life cycles, host - virus ... -
An Improved Lower Bound for Multi-r-ic Depth Four Circuits as a Function of the Number of Input Variables
In this work we study the multi-r-ic formula model introduced by [KS15c] and improve upon the lower bound for multi-r-ic depth four circuits given in [KST16b], when viewed as a function of the number of input variables ... -
Graph Spectral Methods for Analysis of Protein Structures
Network representation of protein structures is an information-rich mode of examining protein structure, dynamics and its interactions with biomolecules. Graph spectral methods are extremely useful and powerful in analysing ...