Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 47 for “"radius of gyration"”.
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Spatio-temporal microseismic analysis of the Woodford Shale, Canadian County, Oklahoma
… gas and oil shales, where the creation of additional permeability through these fracture treatments is essential to production. However, many applications and analyses of these data are either qualitative in nature or include a large element of interpretational bias. This study looks at …
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Direct visualization of cold denaturation of cytochrome-C Using Small Angle X-Ray Scattering
We present the first comprehensive study of the cold denaturation of proteins using Small Angle X‐Ray Scattering. The radius of gyration of equine Cytochrome‐C is determined for varying salt and denaturant conditions at temperatures ranging from ‐25 to 60 degrees Celsius. Radius of gyration …
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Vereinfachte Bemessung von Verbundstützen im Hochbau : Entwicklung, historische Bemessung und Herleitung eines Näherungsverfahrens
… procedure for dimensioning and design of composite columns based on the simplified design method of Eurocode 4. The ultimate load of a composite column is determined as the product of the total area with an effective stress. Buckling safety is provided by using the slenderness ratio L/R …
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Molecular-dynamics simulations of polymers in a solvent
… properties were calculated for polymer chains of 8, 16, 24, 32, and 40 monomers in length. The effects of solvent density on the diffusion coefficient, the average radius of gyration, and the average magnitude of the end-to-end distance vector of the polymer are studied. The same properties of …
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Conformation of Transmembrane Segments of a Protein by a Coarse Grain Model
… process is governed by the cooperative response of different transmembrane segments of the protein. It is believed that the two subunits of the C-terminal dimer provide independent proton channel pathways through the membrane where the conformations of both monomers and dimer are key for …
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Single molecule tracking studies of lower critical solution temperature transition behavior in poly(N-isopropylacrylamide)
… time series analysis and statistical analysis of lateral diffusion, multistate kinetics, and a newly developed, radius of gyration evolution analysis – were compared using a set of sample fluorophore trajectories obtained from diffuse probe in surface-tethered pNIPAAm. The five SMT …
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Lateral buckling of steel I-section bridge girders braced by U-frames
Tbe study consists of an experimental and analytical investigation into the lateral buckling behaviour of steel I-section girders braced by continuous or discrete U-frames. Scaled down laboratory tests on twin I-section girders have been carried out under full instrumentation and are reported. …
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Understanding human mobility patterns through mobile phone records : a cross-cultural study
… contain very detailed calling information of the spatiotemporal localization of hundreds of thousands of users, which can be used as proxies for human trips. The traveling behaviors of 24 autonomous regions in San Francisco (5 regions), Dominican Republic (3 regions) and a European country …
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A computational and synthetic study of poly(benzyl phenyl ether) dendrimers
… dendrimer was synthesised. The preparation of novel organochromium dendrimers has been investigated. Several chromium arene complexes were prepared by different routes, and the halogenation methodology was thoroughly explored with various reagents. The target compound, a chromium complexed …
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Conformational analysis and dielectric relaxation of polycarbosilanes and related materials
The conformational characteristics of poly(dimethylsilmethylene), poly(dimethylsilethene), poly(dimethylsilethane) and a related material, poly(2,2,5,5-tetramethyl-1-oxa-2,5-disilapentane), have been investigated using the method of molecular mechanics. In this method, a quantitative analysis of …
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The Synthesis and Study of Dendrimers and Star Polymers Without Cores
… intramolecularly cross-linked. The combined use of MALDI-TOF MS and SEC analysis of the resulting structures indicated that in each case, as the degree of dendrimer cross-linking increased, its radius of gyration (Rg) decreased linearly. Upon cross-linking of the dendrimer having 64 alkene …
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Depletion Attractions Between Hard Spheres: Comparisons of Theory and Experiment
… the phase behavior and osmotic compressibility of model athermal silica - polystyrene suspensions has been determined over nearly two orders of magnitude in polymer/colloid size asymmetry. Fluid-gel, fluid-crystal, and fluid-fluid transitions are observed as Rg, the polymer radius of gyration, …
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Structural Analysis of Cylindrical Particles by Small Angle X-ray Scattering
The objective of this work is to analyze nano-scaled cylindrical particles by small angle X-ray scattering (SAXS). Three systems with cylinder-shaped particles: (1) Laponite particles in aqueous solutions, (2) Poly(carbon suboxide) particles in binary water/DMF solutions, and (3) Suprastructural …
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Nonlinear Dimensionality Reduction for the Thermodynamics of Small Clusters of Particles
… to study clusters comprising a small number N of interacting particles, which are of interest in science, engineering, and nanotechnology. Specifically, the thermodynamics of such clusters is studied using techniques from spectral graph theory (SGT) and machine learning (ML). SGT is used to …
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Monte Carlo computer simulation of sub-critical Lennard-Jones particles
Cluster characteristics of the 3D Lennard-Jones, LJ, fluid are determined by Metropolis Monte Carlo computer simulations. The percolation probability and cluster distribution is calculated for several state points in the gas-liquid equilibrium region of the LJ fluid. The cluster number distribution …
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Understanding Chromatin Organization and Dynamics with Coarse-Grained Modeling
The genome is the blueprint of human life, and it is crucial to understand its organization. The genome organization is hierarchical with different principles dominating at different scales. At the near-atomistic level, nucleosomes are organized as ordered chromatin fibers or disordered chromatin …
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DYNAMICS AND COMPACTION OF CONGESTED AND/OR CONFINED DNA
In the first part of this thesis, the dynamics of both linear and circular DNA is discussed. The mean square displacement (MSD), reorientation correlation, and the radius of gyration of entangled lambda-phage DNA and the MSD of cosmid DNA were obtained with fluorescence microscopy. From an analysis …
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Nanostructure formation in thin polymer films
In the first part of this thesis an improved process is presented to prepare laterally structured substrates via hierarchical self organization. A miscut silicon surface annealed at 1400 K under ultra high vacuum conditions is used. The resulting facets are stable against oxidation and form a …
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Development of interactive computer programs for mechanical engineering design: fatigue analysis, section properties, and beam analysis
… section properties, such as area, area moment of inertia, and radius of gyration about different axis, of any shape plane cross section. The Beam Analysis program, using transfer matrix method, computes and also plots the curves of deflection, slope, moment, and shear along the beam. Static and …
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Driven Magnetic Flux Lines in Type-II Superconductors: Nonequilibrium Steady States and Relaxation Properties
We investigate the nonequilibrium steady state of driven magnetic flux lines in type-II superconductors subject to strong point or columnar pinning centers and the aging dynamics of nonequilibrium relaxation process in the presence of weak point pinning centers. We employ a three-dimensional …
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