etd AT Indian Institute of Science: Recent submissions
Now showing items 21-40 of 6756
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Semi-analytical solution for eigenvalue problems of lattice models with boundary conditions
Closed-form relations for limiting eigenvalues of an infinite k-periodic spatial lattice in any number of dimensions d, and its semi-analytical extensions for any given size n of the lattice with free-free boundary ... -
Application of Finite Element Limit Analysis and Other Means to Deal with Problems Involving Foundations and Excavations
The finite elements limit analysis (FELA) is an important tool to solve any stability problem in geomechanics. This method provides lower and upper bounds on the true solution for a material following an associated flow ... -
Understanding the Mechanism and Stereoselectivity of Fe-catalyzed Carbene Insertion Reactions using Computational Tools
Transition-metal and enzyme-catalyzed carbene insertion reactions are key methods for constructing C–X (X=N, O, S) and C–C bonds, primarily using catalysts such as Rh, Pd, Au, Cu, and Fe. While most of these give high ... -
Probing Electronic States in Twisted Bilayer Graphene with Electric Fields: A study of Superconductivity, Non-Local Resistance, Magnetoresistance Hysteresis, and Thermoelectric Effects
Introducing a `twist' degree of freedom to modify the low energy band structures and engineer novel electronic phases from the constituent van der Waals 2D materials, was proposed theoretically more than a decade earlier ... -
Investigation of Consolidation Methods for Developing Load-bearing Structures from Lunar and Martian Regolith Simulants
Lunar and martian surfaces provide ideal candidates for establishing extra-terrestrial human settlements, given their proximity to the earth and potential for harbouring water. Significant recent research has focused on ... -
Parallel Algorithms for Efficient Utilization of Multiprocessor Architectures for Transient Stability
Computer hardware capabilities have been enormously increasing over the years. Multicore processors, graphic processing units (GPUs), and field programmable gate array (FPGA) accelerators have grown significantly recently. ... -
Evolution of oxide layers in heat-treated and deformed CMSX-4 superalloy in different atmospheres at 900oC
Superalloys are special class of high temperature alloys that are used for making components in gas-turbine engines, catalytic reactors which are exposed to highly corrosive atmospheres. These alloys have exceptional ... -
Predictive Motion Planning for Safe and Efficient Autonomous Driving
The advent of Autonomous Vehicles (AVs) has the potential to revolutionize transportation systems, promising significant improvements in safety, efficiency, and passenger comforts. Safety, the cornerstone of AVs, demands ... -
Architectures for linewidth reduction in cascaded Raman fiber lasers and applications
Fiber lasers have been increasingly used as a high-power source due to several advantages, such as superior beam quality, better thermal management, high efficiency, and compact and reliable design. In fiber lasers, ... -
Fault Creation, Detection and Classification Systems for Modern Power Grids
The power grid is changing with the exponentially growing penetration of inverter-based resources (IBRs). Keeping the power grid stable, reliable, and secure, and delivering quality power has become increasingly important ... -
Behavioral and Neural bases of Subcomponents of the Attentional Blink
Attention enables us to select relevant stimuli for enhanced sensory processing and decision-making. Yet, our ability to pay attention is severely capacity limited. This limitation is clearly revealed when we seek to perform ... -
Studies on Fluid-Structure Interactions in Hypersonic Flow
Fluid-structure interaction (FSI) represents a critical area of research in aerospace engineering, particularly in the hypersonic flows where aerodynamic and thermal loads significantly impact structural integrity and ... -
Liquefaction response of the sand reinforced with 3D printed geocells
Geocells are one of the most widely used geosynthetics, owing to their three-dimensional interconnected cellular structure that allows immediate support to heavy loads and provides high lateral confinement and wider ... -
Modulating Waveform Generation for Split-Phase Induction Motor Drives and Discrete Modelling of Switched Reluctance Motor Drives
The thesis focuses on the areas for improvement in non-permanent magnet-based electric drives, such as the asymmetrical six-phase (or split-phase) induction motor and the switched reluctance motor drives. In the first ... -
Optimizing Light Absorption and Nanomorphology in Organic Solar Cells and Near-IR Photodetectors with Ternary Blend Approaches
Solution-processed Organic Solar cells (OSCs) are a promising renewable energy solution due to their solution-processable roll-to-roll fabrication, semitransparency, lightweight, and flexibility. Significant efforts have ... -
Electrical Transport and Point Contact Spectroscopy in Core-Shell Bimetallic Nanostructures
An extensively pursued strategy for realizing new materials is the creation of interfaces between two similar or dissimilar systems, which can invoke multiple processes like electronic reconstruction, strain-induced ... -
Breaking Symmetry – Organocatalytic Enantioselective Synthesis of Natural and Unnatural Ladderanes
Architecturally unique compounds produced by nature have remained a source of inspiration for organic chemists. Ladderane phospholipids (such as [5][3]PC and [3][3]PC), isolated in the year 2002 from anaerobic ammonium oxidizing ... -
Passive control and intermittent dynamics of the precessing vortex core oscillation in swirl flows
Swirl is used in modern gas turbine combustor nozzles to achieve reliable flame stabilization and efficient fuel-air mixing. The swirl component in the nozzle jet flow induces an axial vortex. At high swirl intensities, ... -
Impact of Groundwater Level Fluctuations on In-Situ Soil Properties using Automated Wave Detection Methods
Understanding the impact of groundwater level fluctuations on soil properties is crucial in geotechnical engineering, as it influences soil strength, stiffness, and stability. Dynamic soil properties such as Poisson's ... -
The benefits and costs of flexible alternative reproductive tactics in Oecanthus henryi
Alternative reproductive tactics (ARTs) are distinct phenotypes that individuals of a species use to maximize reproductive success. This thesis investigates the persistence and adaptive value of flexible ARTs in male tree ...