Browsing Physics (PHY) by Title
Now showing items 397-416 of 417
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Ultra Cold Fermions : Dimensional Crossovers, Synthetic Gauge Fields and Synthetic Dimensions
(2018-02-06)Ultracold atomic systems have provided an ideal platform to study the physics of strongly interacting many body systems in an unprecedentedly controlled and clean environment. And, since fermions are the building blocks ... -
Ultrafast Photoexcited Carrier Dynamics in Low Dimensional Systems Probed by Time Resolved Terahertz Spectroscopy
The key aspect of this thesis is to understand the photoinduced carrier dynamics in low dimensional systems by employing time resolved optical pump-terahertz probe (OPTP) spectroscopy. Ultrafast pulsed laser (Ti: Sapphire ... -
Ultrafast Response And Time Resolved Spectroscopy Of Carbon Nanotubes, Semiconductors And Rare-Earth Titanates Using Femtosecond Laser Pulses
(2013-10-21)In this thesis, experimental studies are reported of ultrafast dynamics and third order optical nonlinear coefficients of carbon nanotubes, and time resolved coherent phonon dynamics of semiconductors and rare earth ... -
Ultrafast Study of Layered 3D Topological Insulators, Graphene-Gold Hybrid Plasmonic Nanostructure and Ultrathin Gold Nanowires
In a typical time-resolved pump-probe spectroscopy, ultrafast laser pulses (pulse width ~ 100 fs) are utilized to induce a perturbation in the material of study within a time much shorter than the characterisitic lifetime ... -
Understanding DNA-Based Nanostructures using Molecular Simulation
(2018-05-14)Deoxyribonucleic acid (DNA) is arguably the most studied and most important biological molecule. Recently, it has also been established as a potential candidate for nanoconstruction. Self-assembly of DNA molecules has ... -
Understanding Nucleic Acid Charge Transport Properties using Multiscale Modelling Techniques
Understanding charge transport in molecular systems is of fundamental interest in rapidly growing field of molecular electronics as well as to understand biological signal transfer processes which are accompanied by the ... -
Understanding the Behavior of the Sun's Large Scale Magnetic Field and Its Relation with the Meridional Flow
(2018-07-05)Our Sun is a variable star. The magnetic fields in the Sun play an important role for the existence of a wide variety of phenomena on the Sun. Among those, sunspots are the slowly evolving features of the Sun but solar ... -
Understanding The Solar Magnetic Fields :Their Generation, Evolution And Variability
(2010-03-24)The Sun, by the virtue of its proximity to Earth, serves as an excellent astrophysical laboratory for testing our theoretical ideas. The Sun displays a plethora of visually awe-inspiring phenomena including flares, ... -
Unraveling certain high energy astrophysical features based on advective accretion disks
The presence of an accretion disk around a neutron star (NS) or a black hole (BH) is mainly responsible for the observed X-rays from the night sky. NS or BH is a part of the binary systems, and matter flows from a companion ... -
Vertical Structure Of Disk Galaxies And Their Dark Matter Halos
(2015-01-02)The topic of this thesis is the study of the vertical structure of the disk galaxies and their dark matter halos through theoretical modeling and numerical calculations. The basic theoretical model of the galactic disk ... -
Warped Galaxies : Recovery Of Pattern Speed, Velocity Field And The Warp Equation
(2015-08-04)Pattern speed is an important parameter of the density wave theory for spiral galaxies. In this thesis we have determined the pattern speed for warped galaxies (flat galaxies being a special case of this generalization) ... -
X-Ray Crystallograhic Studies On 2',5', Cyclic And Modified Nucleotides
(2007-09-05)This thesis presents the crystal structures of 2', 5', cyclic and modified nucleosides / nucleotides. Chapter I gives a brief account of the structural studies on 2', 5' and modified nucleotides. It also presents a short, ... -
X-ray Crystallographic Characterization Of Designed Peptides Containing Heterochiral And Homochiral Diproline Segments And Database Analysis
(2010-12-30)Understanding the relation between amino acid sequences and protein structures is one of the most important problems in modern molecular biology. However, due to the complexities in the protein structure, this task is ... -
X-ray Crystallographic Studies Of Designed Peptides, Self Assembling Pseudopeptides And Molecular Modeling
(2009-03-04)Structural studies of peptides has relevance for various applications, like, in de novo design of proteins, in designing better catalysts for organic synthesis, in structure based drug design, in the design and construction ... -
X-Ray Crystallographic Studies Of Designed Peptides : Characterization Of Novel Secondary Structures Of Peptides Containing Conformationally Constrained α-, β- And γ-Amino Acids And Polymorphic Peptide Helices
(2010-10-21)Structural studies of peptides are of great importance in developing novel and effective biomaterials ranging from drugs and vaccines to nano materials with industrial applications. In addition, they provide model systems ... -
X-Ray Crystallographic Studies Of Designed Peptides : Characterization Of Self-Assembled Peptide Nanotubes With Encapsulated Water Wires And β-Hairpins As Model Systems For β-Sheet Folding
(2011-08-08)The study of synthetic peptides aid in improving our current understanding of the fundamental principles for the de novo design of functional proteins. The investigation of designed peptides has been instrumental in providing ... -
X-Ray Crystallographic Studies Of Designed Peptides And Protected Omega Amino Acids : Structure, Conformation, Aggregation And Aromatic Interactions
(2009-05-18)Peptides have assumed considerable importance in pharmaceutical industry and vaccine research. Understanding the structural features of these peptide molecules can be effective not only in mimicking natural proteins but ...