etd AT Indian Institute of Science: Recent submissions
Now showing items 241-260 of 8144
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Understanding RNA-Metal Ion Interactions: RNA Folding Pathways and Ion Selectivity
Ribonucleic acid (RNA) plays diverse and critical roles in cellular function. For most biological functions, RNA must fold into specific three-dimensional structures, and physiologically abundant monovalent (Na+ and K+) ... -
Design of Structures and Mechanisms using Topological Derivatives and Exploration of 4D-printed Shape Morphing Structures
We employ topological derivatives to design supports for stiff structures and compliant mechanisms along with exploration of design features for 4D-printed shape-morphing structures. Topological derivative (TD) has been ... -
Understanding the physiological role of ITPK1-type inositol phosphate kinase in embryophytes
Land plants have evolved sophisticated mechanisms to adapt to phosphate (Pi) limitation, yet such regulatory networks in nonvascular bryophytes remain poorly understood. Here, we show that both male and female liverworts ... -
Frequency Comb-Based Seed Sources for High-Power Spectral Beam Combining
In recent years, the need for high-power laser systems has grown across multiple industries. Lasers with high output power and excellent beam quality are used in material processing and directed energy weapons for defense. ... -
Data-Driven Prediction of Concrete Behaviour and Performance Enhancement Through CO₂ Inclusion Techniques
Concrete remains the most widely used construction material globally, valued for its versatility, strength, and durability. However, the conventional approach to concrete mix design, governed by empirical codal provisions ... -
Nonreciprocity, condensation and chirality in active granular systems
We present a journey into the rich non-equilibrium phenomena of active granular systems, a versatile model for studying “living” materials. Our exploration begins with the discovery of non-reciprocal, medium-mediated ... -
Coupled vibro-acoustics of an unbaffled plate
In this work, that falls largely in the realm of applied mathematics, we consider a fluid-loaded finite simply-supported rectangular unbaffled plate with the following objectives: a) to derive a closed form mathematical ... -
High-precision Autonomous Flight and Soft-Landing of Multirotor UAVs with Terminal Attitude Constraints
With the rapid expansion of drone applications, UAVs are increasingly expected to operate in complex and dynamic environments such as landing on autonomous ground vehicles, moving ships, or mobile delivery platforms which ... -
Unified Effort Measure for Natural Posturing of Digital Humans
Digital Human Models (DHMs) are extensively used in industrial ergonomic simulations to predict, understand, and analyse human behavior. However, most existing DHMs are built upon principles developed for robotic manipulators, ... -
Computational studies of the effect of confinement in Zeolitic cavities on the diffusion of monatomic Sorbates and the melting characteristics of Argon Clusters
The present chapter has attempted to study the temperature dependence of the levitation effect. It has been shown that this effect is most pronounced at lower temperatures and decreases in intensity at higher temperatures. ... -
Theortical studies of polar solvation dynamics, ionic mobility, solute diffusion and activated barrier crossing dynamicsin dense liquids
There are several features of this chapter that are new. The self-motion of the probe solute has been incorporated here for the first time and studied systematically. The theoretical approach captures quite successfully ... -
Computer simulation studies of orientational relaxation in strongly correlated dipolar systems
In the preceding three chapters of this thesis, computer simulation and theoretical studies of orientational relaxation in dipolar liquids and solids have been presented. The primary objective has been to understand the ... -
Investigation of fullerenes, Carbon nanotubes, Onions and small gold particles
Abstract not available -
Theoretical studies of barrierless and very low barrier chemical reactions in solution
The above review of experimental investigations on the photophysics of stilbene and related compounds and the torsional dynamics of TPM in dyes in condensed phase clearly indicate a strong influence of viscosity and polarity ... -
Novel layered & three-dimensional oxides of perovskite & related structures: synthesis & investigation of ion-exchange & intercalation
In this chapter, we have described the synthesis of a new series of protonated layered perovskites of the formula, HCa???La?Nb???Ti?O??, from the corresponding potassium compounds by ion-exchange. The protonated compounds ... -
Investigations of the interaction of molecules with clean and modified transition metal surfaces by techniques of electron spectroscopy
We have hitherto discussed the features of adsorbed oxygen on a variety of metal surfaces as characterised by the techniques of electron spectroscopy. Specifically, the characteristics of the different oxygen species O²?, ... -
Studies on porous iron electrodes for alkaline storage batteries and supplementary investigation on porous lead electrodes of lead-acid
It has been demonstrated that an analysis of the open-circuit transients is useful for understanding several aspects of the alkaline iron electrodes. It provides diagnostic criteria for studying the effect of additives. ... -
A Study of electronic structure and semiconductor-metal transitions in perovskite oxides
In this chapter we discuss the semiconductor-metal transition in La???Sr?CoO?. We study the electrical resistivity, X-ray photoelectron spectroscopy (XPS), Ultraviolet photoelectron spectroscopy (UPS), Auger electron ... -
Computer simulation studies of ionic motion in nasicon-type superionic conductors
In summary, a new interionic potential function for Li? with the Zr?(PO?)? framework of the LiZr?(PO?)? system, consisting of three terms-Coulombic, repulsive, and charge-polarizability interaction-has been proposed. ...