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 91 for “"thermal fluctuations"”.
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Enhanced droplet spreading due to thermal fluctuations
… devices. Unlike for thicker films, the thermal motion of the constitutive molecules can affect dynamics and may need to be included when modeling nanometer mechanical systems. Yet, explicitly modeling all of the molecules of a thin liquid film interface is often intractable. Thus there …
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Inelastic light scattering from thermal fluctuations in gases.
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1970. Ph.D.
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Spectrum of light scattered from thermal fluctuations in gases
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1967. Ph.D.
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Temperature prediction using thermal fluctuations from wireless sensor networks in adaptive filter model
… methodologies to learn the relationship between thermal fluctuations at distinct locations within a lab environment.
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Light mixing spectroscopy and the spectrum of light scattered by thermal fluctuations in liquids.
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1967. Ph.D.
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A Study of Inhomogeneities and Anisotrophies In Superconductors via Ginzburg-Landau Type models
… and how their movement is affected by thermal fluctuations is critical to understanding how to maintain resistanceless current flow. We study a variety of Ginzburg-Landau type models for superconductivity that can account for inhomogeneous and isotropy materials, grain boundaries, and …
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Statistical Mechanics of Two-Dimensional Materials; From Biological Membranes to Graphene
… deformations. Further, they undergo noticeable thermal fluctuations at room temperature. In the following, we highlight both the characteristics and implications of thermal fluctuations in 2D materials and discuss the following problems in biological physics and material science: (i) The minimum …
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Heterogeneous Ultrafast Energy Transfer in Photosynthetic Proteins
… distances, which vary within proteins due to thermal fluctuations of the structure. As a result, models predict that the energy transfer rates vary dramatically between proteins, producing some instances of inefficient energy transfer. Reconciling the high efficiency with the presence of …
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Correlation Force Spectroscopy for Single Molecule Measurements
… closely-spaced micro-cantilevers that undergo thermal fluctuations. Measurement of the correlation in thermal fluctuations of the two cantilevers can be used to determine the mechanical properties of the soft matter, e.g. a polymeric molecule, that connects the gap between the two cantilevers. …
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Quantum Transport of Electronic Excitations through Macromolecules
… yet, including the role played by molecular thermal fluctuations and the possible correlations between the degree of quantum coherence and the efficiency of the transport process. In order to gain some insight, we developed a rigorous and systematic framework describing quantum transport, …
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Statistical Mechanics of the Amorphous Solid State of Randomly Cross-Linked Macromolecules
… solid state is presented that accounts for both thermal fluctuations and quenched disorder. It is found that the shear modulus grows continuously from zero at the transition, and does so with the classical exponent, i.e., with the third power of the excess crosslink density. It is also found …
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Coarse-grained models of biomolecule dynamics and allostery
… it has become increasingly accepted that thermal fluctuations take active part in functional tasks of biological molecules. We employ a set of coarse-grained models to investigate the mechanism of transmission of allosteric signal via spatial fluctuations. Our models are coarser than those …
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Physical interpretation of coarse-grained bead-spring models of complex fluids
… these materials requires accounting for both thermal fluctuations and non-equilibrium processes. This has proven to be challenging with traditional approaches of energy minimization and perturbation in field theories. At the same time, simulations of highly coarse-grained particle-based …
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Inter-annual variability of acoustic ray travel times in the northeast Pacific
… in order to investigate inter-annual basin-scale thermal variability. These thermal fluctuations may help detect any greenhouse warming and greater understanding of them will increase knowledge of ocean-atmosphere interactions which affect weather and climate. A discussion of the program for …
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Computational study of actin morphology and rheology
… the stiffnesses of actin filaments and ACPs, and thermal fluctuations were evaluated at various prestrain levels. These studies demonstrated for the first time that under typical biological conditions, extensional stiffnesses of both actin filaments and ACPs were surprisingly significant, but …
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Near-Field Hydrodynamics of Optically Trapped Colloids in Simple and Complex Fluids
The thermal fluctuations of colloidal particles change drastically near a symmetry-breaking interface due to long-range hydrodynamic interactions. In this thesis, I investigate this phenomenon through both experiments and simulations. Using Optical Tweezers (OTs), I measured the correlated thermal …
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Imaging the dynamics of soft materials at microscale and nanoscale
… are soft. They can usually be deformed easily by thermal stresses or thermal fluctuations at about room temperature, which makes their dynamic behaviors of great interest and importance. In this thesis, imaging tools such as bright-field and dark-field optical microscopes and liquid-phase …
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Measuring acoustic fields in an optical trap
… Eccentricity of measured distributions of thermal fluctuations of trapped dielectric spheres is attributed to a large, directional 60 Hz noise source. Analyses of trap stiffness insensitive to this noise are discussed and their results plotted. Knowledge of the trap and the dynamics of …
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Statistical Mechanics of thermalized ribbons and sheets
<p>In this dissertation, we study the thermal behavior of two-dimensional sheets and ribbons. We study the effects of thermal fluctuations on the crumpling transition of elastic sheets. Existing two-dimensional sheets have a crumpling temperature which is very high and the crumpling transition has …
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Casimir-Polder interaction in second quantization
… a nearby surface, arising from the (quantum and thermal) fluctuations of the electromagnetic field, is a cornerstone of cavity quantum electrodynamics (cQED), and theoretically well established. Recently, Bose-Einstein condensates (BECs) of ultracold atoms have been used to test the predictions …
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