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 26 for “"overdamped"”.
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An overdamped multimodal adaptive nonlinear static procedure for seismic assessment of rc infilled frames
… proposes a multimodal adaptive procedure named overDamped Displacement Adaptive Procedure (D-DAP). This method has been developed from the combination of the approaches proposed by Pinho et al. and by Ghersi et al. The multimodal adaptive procedure to update the load vector is taken from the …
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Effect of geometry under emitter membrane on pressure compensating performance
… performance was characterized by two models, an overdamped model and a piecewise model. A comparison of the models found an overdamped model to predict parameters with a greater degree of certainty than the piecewise model. No trends in emitter behavior could be identified with 95% certainty, but …
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Dynamics of a four-well system interacting with a dissipative environment
… as a function of time are found in the limit of overdamped oscillations. Also in this limit, the time evolution of the density matrix of a four-well system is found. The diagonals elements are then rederived by considering an infinite chain of wells.
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Stochastic dynamics and fluctuation theorems in Brownian, feedback-controlled, and optical cavity systems
… Next, continuous measurement and feedback in an overdamped Brownian particle system are analyzed. Fluctuation theorems and second-law-like inequalities are derived for entropy production associated with both the system variable and the feedback parameter, and these results are interpreted in …
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Experiments with synthetic spin-orbit coupling and spin transport in Bose Einstein Condensates
… Raman coupling, dressed spins' oscillations are overdamped and accompanied by rich excitations in the BEC but less thermalization.</p>
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Bias stress detection of dislocation resonance in lead
… increased attack frequency model, which requires overdamped dislocations in the normal state. An electronic drag constant is derived of B = 2 x 10-6 cgs, which is lower than previous estimates, but in good agreement with a recent calculation by Brailsford. The measurements are also used to derive …
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The Stochastic Dynamics of Optomechanical Sensors for Atomic Force Microscopy
… fluid omega_f. It is found that the nanobeam is overdamped in water. However, the nanobeam is underdamped in air and has quality factor of Q is approximately 4. The noise spectrum is determined from deterministic numerical calculations and the Fluctuation-Dissipation Theorem. This is possible …
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Geometric Mechanics of Active Particles
… is that these appearances often manifest in overdamped systems, where viscous damping forces dominate inertia driven effects. Abstract Starting at the equations of motion for active systems, where constituent active particles provide energy input at the microscopic level, the emergence of …
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Borehole Measurements of Dynamic Basal Drainage Adjustments During Sliding Accelerations: Bench Glacier, Alaska
… borehole following perturbation. Underdamped and overdamped slug test responses show a high degree of connectivity among boreholes connected via the glacier bed. The nature and degree of connectivity is temporally variable, suggesting that the drainage network at the bed is highly dynamic on time …
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Borehole Measurements of Dynamic Basal Drainage Adjustments During Sliding Accelerations: Bench Glacier, Alaska
… borehole following perturbation. Underdamped and overdamped slug test responses show a high degree of connectivity among boreholes connected via the glacier bed. The nature and degree of connectivity is temporally variable, suggesting that the drainage network at the bed is highly dynamic on time …
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An analytical study of dynamic response and nonequivalence of an absolute active cavity radiometer operating at cryogenic temperatures
… determined from closed-loop active operation. Overdamped, underdamped and nearly critically damped model response is obtained for selected values of the electrical circuit time constant.
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Ratchet dynamics in nonlinear Klein-Gordon systems
… lattice of point-like inhomogeneities in the overdamped regime. In addition, we explained the underlying rectification mechanism within a collective coordinate framework, which shows that such a system behaves as a rocking ratchet for point particles.This was supported by numerical …
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Fission dynamics in a microscopic theory
… from saddle to scission is a non-adiabatic, overdamped one. To overcome the limitation of TDDFT that fails to produce the variances in the FF properties, a novel method in the spirit of the classical Langevin approach is promoted to include fluctuations and dissipations into the TDDFT …
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Crystalline Protein Dynamics : A Simulation Analysis of Staphylococcal Nuclease
… Modes with frequencies below 0.55THz are overdamped while the majority (98.6%) of modes perfom underdamped vibrations. MD simulations over the pressure range 1bar to 15kbar reveal a qualitative change in the internal protein motions at approximately 4kbar. This change involves the …
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Optimizing Irreversible Perturbations of the Unadjusted Langevin Algorithm
… investigates irreversible perturbations of overdamped Langevin dynamics, aiming to accelerate mixing while controlling discretization error. Irreversible perturbations introduce skew-symmetric drift terms that preserve the target distribution while inducing rotational flow, thereby enhancing …
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Critical Evaluation of DC-Grid and Strong Grid-Forming Wind Generator Systems
… system modeling. Stability analysis proves that overdamped operation is achieved through proper grid frequency feedback in the MG control. The second part presents the design of a non-permanent magnet alternative through a triple-three-phase wound rotor synchronous generator (T-WRSG) optimized …
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Constrained Motion Analysis of Spacecraft Trajectory in Restricted Three Body Problem
… the results are analyzed for the underdamped, overdamped and critically-damped systems. In addition, the delta-v is compared for the transient response with time-varying linear quadratic regulator (LQR). For fully constrained system, the control accelerations required to maintain the desired …
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Spontaneous symmetry breaking transport : from anomalous response to chiral separation
… experimentally in [3], (ii) the dynamics of an overdamped Brownian particle in a two dimensional square lattice, published in [4], and (iii) the dynamics of two interacting Brownian particles, i.e. a dimer, in a one dimensional periodic potential. Lastly, we show how lattice potentials can be …
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Continuum Models of Collective Migration in Living Tissues
… our minimal continuum model of a tissue as an overdamped active elastic medium on a frictional substrate. The model couples mechanical deformations in the tissue to myosin-based contractile activity and to cell polarization. Two new ingredients of our model are: (i) a feedback between the …
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The Correlated Dynamics of Micron-Scale Cantilevers in a Viscous Fluid
… amplitude spectrum yielded a curve similar to an overdamped system. It is observed that the amplitude and noise spectrum yield the same qualitative response for a 2-D cantilever in a shear thinning, power-law fluid. The correlated dynamics of a tethered vertically offset cantilever pair is …
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