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.
Results
Showing 1 to 20 of 62 for “"Kramers"”.
-
Asymptotic Problems Related to Smoluchowski-Kramers Approximation
According to the Smoluchowski-Kramers approximation, the solution \qu , also referred to as ``Physical" Brownian motion, of the Langevin's equation $\mu\ddot{q}_{t}^{\mu,\varepsilon}=-\dot{q}_{t}^{\mu,\varepsilon}+b(q_{t}^{\mu,\varepsilon})+ …
-
High-pressure NMR studies of model membranes and Kramers turnover on solution
The pressure and anesthetic effects on lineshapes and various relaxation times of phospholipid model membranes DPPC in multilamellar dispersions and in unilamellar vesicles have been investigated by using $\sp{31}$P NMR, $\sp2$H NMR, as well as one and two dimensional $\sp1$H NMR techniques in both …
-
Biomolecular Folding Rates As Understood From Single-Reaction-Coordinate Langevin Dynamics And Kramers’ Theory
… was compared to the analytical predictions of Kramers' theory. Strong discrepancies were noted. The failure of the Kramers' theory was attributed to the slow dynamical response of the beads, which it does not account for. The results of this work highlight the necessity to include in the …
-
Spin-lattice relaxation of trivalent praseodymium, terbium, and erbium in anhydrous lanthanum trichloride: Temperature and magnetic field dependence
… dependence of the relaxation rates. The non-Kramers Pr:LaC13 system was bottlenecked in the direct region and hence its relaxation rate was essentially frequency independent. The Kramers system Er:LaC13 showed a direct process frequency dependence which was very close to the fourth power law …
-
Exploring linear and nonlinear electromagnetic responses in topological materials
… thesis are the conventional Weyl semimetal, the Kramers Weyl semimetal, and the moiré Chern insulator. We begin this research topic by understanding how charge-density waves impact electric field-induced transport in the topological system: the Weyl semimetal.Research over the past several years …
-
Derivação e solução de equações modelo da dinâmica de gases rarefeitos
… Térmico, Deslizamento Térmico e problema de Kramers.
-
Localization, escape rate and delocalization in kinked ratchet potentials
… points in the effective potential. Analogous Kramers rate for transition between kinks is derived through simulations under different values of parameters defining the system. Adding tilting to the system with a proper choice of tilting frequency induces stochastic resonance. Delocalization of …
-
Statistical Inference for Stochastic Differential Equations using Splitting Schemes
… used. The theory is illustrated by applying the Kramers oscillator model to model paleoclimate data. The thesis further extends to developing multivariate Pearson diffusion models, which generalize existing univariate Pearson diffusion frameworks by incorporating linear drift and a quadratic …
-
Evaluating Coaches’ Program Delivery in Golf Canada’s Learn to Play Program
… of life skills development and transfer (Bean, Kramers, Forneris, & Camiré, 2018), Article One qualitatively explored coaches’ (N = 13; Mage = 38) consistency of life skills delivery across the season. The findings revealed five profiles, with coaches categorized as being either inconsistent …
-
Quantum Matter in the Era of Generalized Symmetries
… non-invertible symmetries. We discover a new Kramers-Wannier-like duality and a rich phase diagram including a noninvertible symmetry-enriched incommensurate phase. The translation symmetry of the spin chain has a nontrivial interplay with the lattice Kramers-Wannier duality, which matches the …
-
A study of the diamonds, diamond inclusion minerals and other mantle minerals from the Swartruggens Kimberlite, South Africa
… particularly that regarding diamond formation. Kramers (1977) fIrst clearly recognised the ancient origin of diamonds from his studies of composited sulphide inclusions. However, it was not until mid-Archean ages were obtained from syngenetic garnet inclusions in diamond by Richardson et al. …
-
Thermal activation and macroscopic quantum phenomena in superconducting devices
… between our results and the predictions of Kramers' thermal activation model in certain types of potentials.
-
Electron paramagnetic resonance of myoglobin and related ferrous complexes
… The EPR signals in this work are from non-Kramers doublets which are not usually EPR active. These integer spin systems are nondegenerate in B = 0 and therefore split quadratically in B. In order to interpret the signals, a simulation program based on the spin Hamiltonian Illi = S·D·S + …
-
Qed in periodischen und absorbierenden Medien
… Streuern betrachtet, deren Polarisierbarkeit den Kramers-Kronig Relationen gehorcht. Es wurde ein Quantisierungsverfahren nach Knöll, Scheel und Welsch [1] verwendet, das als eine Ergänzung zum mikroskopischen Huttner-Barnett Schema [2] aufgefaßt werden kann und in dem auf der Basis der …
-
Band-to-band tunneling in silicon diodes and tunnel transistors
… A theoretical analysis based on the Wentzel-Kramers-Brillouin (WKB) approximation for tunneling probability combined with an uncoupled full-band Poisson equation solver and the calculated band structure changes is developed to model the experimental results. Reasonable agreement between …
-
Thermodynamic and kinetic studies of purple membrane from halobacterium halobium
… and we analyzed the data in terms of a modified Kramers' theory. In the second experiment, we determined the purple membrane's apparent density, thermal expansivity, isothermal and adiabatic compressibilities, and specific heats at constant pressure and constant volume. In the final experiment, …
-
Theory of nonequilibrium transport based on a class of chaotic fluctuations
… distributions, the enhancement or suppression of Kramers escape rate, as well as the correspondence between chaotic and stochastic resonance. Moreover, under the condition of free field, we have found interesting connection between the particle dynamics and statistical mechanics, and have …
-
Highly absorptive thin films for integrated photonic devices
… J-aggregate thin films are analyzed using Kramers-Kronig regression to determine their complex index of refraction, an important parameter involved in photonic device design. Additionally, a soft lithography method is demonstrated for patterning and deposition of LBL J-aggregate thin films. …
-
Nanofluidic devices for rapid analysis of DNA and proteins
… upon the equilibrium partitioning theory and the Kramers rate theory properly describes the field-dependent sieving behavior, presenting notable progress beyond the existing equilibrium model in conventional gels.
-
Stochastic chaos and thermodynamic phase transitions : theory and Bayesian estimation algorithms
… and Fokker-Planck equations, we investigate Kramers' escape rate problem. We show that there is a deep analogy between kinetic rate theory and stochastic chaos, for which we propose a novel definition. In Part II, we develop techniques based on Volterra series modeling and Bayesian non-linear …
Page 1 of 4