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 90 for “"dynamic effects"”.
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A Simplified Icing Model for Simulation and Analysis of Dynamic Effects
Ice accretions on aerodynamic surfaces are a major concern during flight. In this research effort, glaze ice is being modeled and its effects on aircraft dynamics analyzed. This type of ice builds up as a clear layer on aerodynamic surfaces and other components such as antennas and intakes. Glaze …
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Observation and Nature of Non-statistical Dynamic Effects in Ordinary Organic Reactions
… these reactions, consideration of nonstatistical dynamic effects or the detailed motion and momenta of the atoms is necessary to account for the experimental observations. Dynamic effects have been found to be important in a growing number of reactions and the nature of these effects can be …
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Hydro-dynamic Effects with Particular Consideration of Water Quality and their Measurement Methods
Die Entwicklung der Strömungsmechanik im 20. Jahrhundert wurde auch durch intensive Forschungen geprägt, um die zahlreichen in der Praxis auftretenden hydrodynamischen Effekte zu ergründen, die physikalischen Abläufe und Zusammenhänge zu verstehen und diese mathematisch zu beschreiben. Dies wurde …
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Optimized Sythesis of a Force Generating Planar Four-Bar Mechanism Including Dynamic Effects
… four-bar linkages by coupling optimization, dynamics and kinematics. This synthesis technique gives the designer the ability to design linkages having a desired resistance profiles under an assumed motion profile. The design approach presented in this thesis calculates the resistance forces …
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Dynamic Effects of Stress and Hostility: Group Differences in Cardiovascular Regulation and Learning
… high-hostile participants was attempted. Second, dynamic variations in functional cerebral asymmetry in response to pain (cold pressor stressor) and affective verbal learning (positive and negative valenced word lists) were measured. High- and low-hostile participants (n = 64) were identified …
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Two-phase flow processes with dynamic effects in porous media - parameter estimation and simulation
This study contributes to the understanding of dynamic effects in the capillary pressure-saturation relationship on the local scale and macroscale as well as giving an assessment as to when these effects might need to be taken into account for the evaluation of two-phase flow processes. In a …
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Doing Time: Understanding the Dynamic Effects of Paternal Incarceration on Children's Development of Aggressive and Delinquent Behaviors
… of incarcerated fathers. Although studies of the effects of parental incarceration on child outcomes have become increasingly more rigorous, there remain several limitations in the literature. Specifically, prior research has tended to address the relationship from a static framework, by …
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Turning quicksand into bedrock : understanding the dynamic effects of disease-focused global health aid on health systems
… extremely difficult. Using the tools of system dynamics, this thesis consolidates the collective wisdom of previously published investigations and anecdotal observations to reveal the field's prevailing "mental model" of the dynamic in question. The result is a set of diagrams that describe the …
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An Investigation of the Dynamic Effects of Flap Deflection on the Aerodynamic Characteristics of an Airplane Wing Using Computational Fluid Dynamics
… of STAR-CD, a commercial computational fluid dynamics (CFD) software, to an investigation of the dynamic effects of flap deflection on the lift, drag and moment coefficients, as well as on the location of the center of pressure. For this study, a plain flap was modeled with a moving mesh and …
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Development and analysis of a vertical dynamic railcar model
… natural frequency of a vehicle. At high speeds, dynamic effects can cause high wheel loads and harsh ride for sensitive cargos. Computer simulation of these and other vertical dynamic effects cans assist in design selections of vehicle components and diagnosis of troublesome vehicle responses. …
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A unified method to predict pilot-induced oscillations
A pilot-induced oscillation (PIO) is a dynamic coupling between pilot and aircraft that produces undesired oscillations as a result of attempted pilot control of the vehicle. Present day methods that are intended to predict which aircraft are susceptible to PIO deal primarily with the linear …
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A Method for the Combination of Stochastic Time Varying Load Effects
… are modeled by deterministic shapes for static effects and by continuous random processes for dynamic effects.
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Vibration of Buildings Under Random Wind Loads
… leads to slender and flexible buildings, the dynamic effects of the wind are of increasing importance. The purpose of this study was to develop a method for analyzing the three-dimensional dynamic response of buildings subjected to random wind loads.
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Collective structure and dynamics of colloids far-from equilibrium
… when interactions between elements lead to dynamic effects resulting in unexpected emergent behavior. Going beyond the traditional scheme of relying on equilibrium statistics and free energy minimization to explain the system behavior, this thesis focuses on the rich structure and dynamics …
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Marginal income tax rates and the U.K. economy: three essays
… about fiscal policy and then analyze the dynamic behavior of output, the interest rate, the exchange rate, and the trade balance in response to an increase in AMTR by studying the impulse response functions (IRFs) derived from the VAR and structural VAR (SVAR) approaches. The first essay …
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Labor Market Dynamics in West Virginia and the Appalachian Region
… of three manuscripts analyzing labor market dynamics in West Virginia and the Appalachian Region. The first manuscript examines the dynamic effects of national, regional, and local labor market shocks on labor force participation rates in Appalachia. A dynamic factor model with time-varying …
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Vibration analysis and control of dynamics effects of moving vehicles over bridges
… evaluation of the optimal models to asses the dynamic effects of moving vehicle on a bridge is performed. These models, with increasing grades of complexity, represent the best approximation of the problem under certain assumptions. Case studies are also performed with these models. In addition …
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Drawing driver's attention to potentially dangerous objects
… to increase the effect of enhancement, and dynamic effects like changing the enhancement window size, window location, contrast, and brightness are added to increase the detectibility of the object by the driver. Experiments showed that our method increased the perceptibility of potentially …
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The tasks with effects model for safe concurrency
… concurrent programming model called tasks with effects (TWE) that is intended to fulfill these goals. The core unit of work in this model is a dynamically-created task. The model's key feature is that each task has programmer-specified effects, and a run-time scheduler is used to ensure that two …
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Topics In Statistical Inference For Treatment Effects
… different approaches for estimating treatment effects, either in observational study or randomized trial. The first paper presents an approach to sensitivity analysis for the instrumental variable(IV) method, which examines the sensitivity of inferences to violations of IV validity. Our …
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