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 32 for “"anomalous diffusion"”.
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Anomalous diffusion in anisotropic media
… was investigated by pulsed field gradient diffusion NMR and complementary deuterium line shape analysis. Restricted diffusion was studied in two lyotropic lamellar systems, the first consisting of crosslinked flat lamellae in anisotropic hydrogels and the second consisting of spherically …
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Deterministic transport: from normal to anomalous diffusion
… physics. In the present work the deterministic diffusion generated by simple dynamical systems is considered. The deterministic nature of these systems is more clearly expressed through the dependencies of the transport quantities as functions of systems parameters. For fully hyperbolic …
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Heavy Tails and Anomalous Diffusion in Human Online Dynamics
… in newer logs as well as the switch from superdiffusion to normal diffusion in the diffusive processes of the random walks. In the language of foraging, the newer logs indicate that online searches overwhelmingly yield local searches, whereas for the older logs the foraging processes are a …
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Anomalous diffusion of mRNA in the cytoplasm of HeLa cells
Information about the diffusive motion of RNA would provide insights into intracellular structures and functions, as well as gene expression and genetic regulation. We study the motion of individual messenger RNA molecules in the cytoplasm of HeLa cells. RNAs are imaged in live cells via total …
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Non-Markovian stochastic processes and their applications: from anomalous diffusion to time series analysis
… equation, which can be used in order to model anomalous diffusion and transport in statistical physics. In the first part, we brought the reader through the fundamental notions of probability and stochastic processes, stochastic integration and stochastic differential equations as well. In …
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Measurement of rapid protein diffusion in the cytoplasm by photoconverted intensity profile expansion
… role in biological function. To measure protein diffusion in cells, researchers have developed multiple fluorescence microscopy methods, and have tested them rigorously. However, using these methods for precise measurement of diffusion coefficients requires expertise that can be a barrier to …
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PIC simulation of a ceramic-lined Hall-effect thruster
… walls, an improved sheath model, and a new anomalous diffusion algorithm. Converged results with low anomalous diffusion diffusion were obtained, along with intermediary results with higher diffusion.
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Spatial Stochastic Modeling of the ErbB Receptor Family
… and detailed measures of dimer lifetimes and diffusion. A major observation from the experiments is the anomalous diffusion of the receptors. One suggested contributor to this anomalous diffusion is confinement zones on the membrane. In this work, we develop, validate, and implement a spatial …
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A Simulation Approach to Thermodynamics in Interfacial Phenomena
… predictive models capable of describing reaction-diffusion phenomena in chemically-amplified resists and analyze their performance as a function of film thickness. In this dissertation, using mesoscopic models it is found that a central aspect governing reactions is the anomalous diffusion of the …
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ΗΛΙΑΚΕΣ ΚΥΨΕΛΙΔΕΣ ΠΥΡΙΤΙΟΥ ΚΑΤΑΣΚΕΥΑΣΜΕΝΕΣ ΜΕ ΤΗ ΜΕΘΟΔΟ ΤΗΣ ΙΟΝΤΙΚΗΣ ΕΜΦΥΤΕΥΣΗΣ
… CHANNELING AND RANDOM CONDITIONS. PHENOMENA OF ANOMALOUS DIFFUSION WERE OBSERVED DURING ANNEALING A DEPENDING ON THE ANNEALING PROCESSING. FINALLY THE I-V, FF, AND CELL PARAMETERS WERE MEASURED FOR EACH ANNEALING METHOD WITH OR WITHOUT ANTIREFLECTIVE COATING, AND THE RESULTS WERE COMPARED.
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Anomalous statistical properties and fluctuations on multiple timescales
… The first issue concerns the causes of anomalous diffusion. A previously proposed framework decomposes the Hurst exponent into the Joseph, Noah, and Moses effects. They represent violations of the three premises of the central limit theorem. Here the framework is applied to an …
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Effect of Nonequilibrium Defects Due to Phase Transformation on Diffusion in Beta Zirconium
… of the hcp(--->)bcc phase transformation on the anomalous diffusion characteristics of bcc zirconium has been investigated in this study. ('113)Sn and ('59)Fe tracers were used to typify the diffusing nature of self- and fast-diffusing atoms. A differential measurement of diffusion in two samples …
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Fast Solution Methods For Fractional Diffusion Equations and Their Applications
<p>Fractional diffusion equations model phenomena exhibiting anomalous diffusion that can not be modeled accurately by the second order diffusion equations. Because of the non-local property of fractional differential operators, the numerical methods have full coefficient matrices which require …
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Fully kinetic numerical modeling of a plasma thruster
… at a rate which preserved quasineutrality. Anomalous diffusion was included through an equivalent scattering frequency. Free space permittivity was increased to allow a coarser grid and longer time-step. A method for changing the ion to electron mass ratio and retrieving physical results was …
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Active Transport in Chaotic Rayleigh-Bénard Convection
… solve the Boussinesq and the reaction-advection-diffusion equations in a spatially-extended cylindrical domain with experimentally relevant boundary conditions. The transport is quantified using statistics of spreading and in terms of active transport characteristics like front speed and geometry …
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Diffusion of proteins inside crowded structures generated using microemulsions
… a counterpart of DFPase with a similar size, the diffusion inside a microemulsion can be studied with the fluorescence correlation spectroscopy (FCS) method. Here, fluorescent impurities in the used components are a problem. By the choice of a suitable concentration of GFP+ and regarding the …
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Characterizing Erythrocyte Motions in Flowing Blood
… present at normal levels, but follow convective diffusion in dilute suspensions. A critical need is to understand and characterize dispersion and diffusion as they apply to red cells in suspension flow. The dispersive motions of <br />0.5-micrometer beads and fluorescently labeled human RBC …
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Photon Path Lengths Distributions for Cloudy Skies : Their first and second-order moments inferred from high resolution oxygen A-Band spectroscopy
… to experimentally prove a new theory of photon diffusion of cloudy sky for the first time. The presented observations provide (further) evidence for the anomalous diffusion transport of solar photons being transmitted by complicated cloud covers. It is also shown, that Levy walks are well suited …
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