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 37 for “"Fast dynamics"”.
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Measurements of fast dynamics of hole spins in silicon
… spin-orbit interactions (SOI), has enabled fast electrical control, however, requires a richer understanding of the physics of interacting spins in the presence of SOI both for control as well as readout of the spin states. In this thesis, I explore the spin dynamics of holes in silicon …
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Decoupled Stability Analysis of Power Systems With Slow and Fast Dynamics
… coordinate transformation, the slow and fast dynamics are partially decoupled, allowing for independent stability studies in the slow and fast subspaces. The decoupled subsystems can be physically interpreted as smaller size power systems. On a higher hierarchy, a weighted sum of the …
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Model simplification and robust control in deterministic and stochastic systems using singular perturbation methods
… changes, unknown parameters, and unmodeled fast dynamics. A number of different stochastic and deterministic models that incorporate these uncertainties have been proposed in the literature, and these have led to different robust control and filtering problem formulations, methodologies, and …
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Development of in vivo ppGpp reporters in escherichia coli
… of synthetic circuits with relatively fast dynamics. In this study, a series of in vivo ppGpp reporters were developed in E. coli by placing a fluorescent protein under the control of promoters from genes known to be controlled by ppGpp levels. Reporter performance was tested by …
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The Dynamics of Molecular Glasses Studied by Light Scattering
The present work is devoted to studying the dynamics in molecular glass formers applying the light-scattering (LS) technique, in particular tandem Fabry-Perot interferometry which allows to cover the frequency range from 0.3 GHz to 1000 GHz. Chapters 4 to 7 each present, in a self-contained way, …
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Spin-orbit torque switching of compensated ferrimagnetic cobalt-terbium alloys
… antiferromagnetically coupled systems exhibit faster dynamics and are more stable against external magnetic field perturbations, which could potentially enable spintronic devices with higher speed and density. Despite the potential advantages of information storage in antiferromagnetically …
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Adaptive Control of Nonaffine Systems with Applications to Flight Control
… adaptive controller is defined as a solution of fast dynamics, which verifies the assumptions of Tikhonov's theorem from singular perturbations theory. Simulations illustrate the theoretical findings.
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Fret-Based Investigations of The Structure-Function Relationships In The Nmda Receptor
… are unable to fully resolve the movements and dynamics necessary for appropriate function. The work in this dissertation uses single molecule Förster Resonance Energy Transfer (smFRET) as a means to address that gap. We have examined the question of partial agonism of the NMDA receptor, noting …
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Control of flexible joint robotic manipulator using tuning functions design
… Also without loss of generality, the fast dynamics, that is the dynamics of the driver side of the system are neglected for the sake of simplicity; In the first case, the design procedure adopted is called observer backstepping. Since the states of the system are unavailable for …
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Nonlinear Model Predictive ControlFast Algorithms and Implementation
… MPC cannot be directly applied to system with a fast dynamics. To overcome this problem, two possible approaches are proposed here: a set-membership (SM) based technique and a approximation of the optimization solver. The proposed SM based technique, substantially, allows to avoid solving the …
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Approximate Dynamic Programming with Applications
… is usually restricted to systems with slow dynamics. One reason for this is that the delay between measurement and actuation introduced by computing the control signal on-line can severely degrade systems with fast dynamics. A method to improve robustness against such delays and other …
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Modeling and simulation of commercial aircraft electrical systems
… is proposed to study the general power flow and dynamics of commercial aircraft electrical systems. This was done by creating a toolset composed of the crucial elements to model an aircraft electrical system that consists of power sources, power conversion, power distribution, and electrical …
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Dynamics of biological macromolecules investigated by fluorescence depolarization
"The fast dynamics of biomolecular systems are believed to be important to their physiological function. Fluorescence depolarization is a powerful technique for the investigation of these dynamics. A general overview of the use of time-resolved fluorescence to investigate nanosecond dynamics is …
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Dynamics of biological macromolecules investigated by fluorescence depolarization
"The fast dynamics of biomolecular systems are believed to be important to their physiological function. Fluorescence depolarization is a powerful technique for the investigation of these dynamics. A general overview of the use of time-resolved fluorescence to investigate nanosecond dynamics is …
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Opto-fluidic neural probes for optogenetic brain interrogation
… this goal, novel tools to capture neurochemical dynamics with high spatiotemporal precision, and vast multiplexing ability are needed. On the other side, tools for neuromodulation at high speeds and high spatial precision are needed to interrogate brain networks at any arbitrary stimulation …
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MiniFAST: A Fast and Sensitive Microscope for in vivo Neural Imaging
… indicators (GECIs) which have bright and slow dynamics (> 1 s) easily captured by most image sensors at frame rates of 30 Hz or less. However, there are many neuroscience applications which would benefit from using other emerging neural indicators, such as fluorescent genetically-encoded …
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Transmission Line Dynamics Modeling For Power Electronics-Enabled Control in the Electric Power Systems
… on multiple time scales, with slower mechanical dynamics from synchronous machines, faster electromechanical controls and protection, and very fast electrical dynamics from transmission networks. This time scale separation results in system modeling techniques which neglect certain component …
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Quantifying the Sensitivity of Land-Surface Models to Hydrodynamic Stress Limitations on Transpiration
… based on models’ ability to predict the fast temporal dynamics of transpiration in different ecosystems and atmospheric forcing. Distinct error patterns occur when soil moisture is non-limiting, when the soil is near the wilting point, when VPD is not limiting, and when VPD is high. …
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Multiport Energy Router based Integration of Renewable Energy Sources for Offshore Grid
… systems. The proposed MPC controller can handle fast dynamics, incorporate various constraints, and have straightforward digital implementation.
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Assessing the Effectiveness of Lockdowns and Mask Mandates on Reducing COVID-19 Infections in Essential Worker Populations
… been proposed to understand and forecast the dynamics of spread of infectious diseases. Only a few, however, account for the role of "essential" workers, who must keep interacting face-to-face with others during a pandemic. In this work, we consider how these "essential" workers are …
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