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 19 of 19 for “"potential instability"”.
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The use of conditional and potential instability axes for severe weather forceasting
… forecast parameters. The maximum theta-e (potential instability) in the lowest 300 mb and the deep-layer lapse rate (conditional instability) fields are two commonly used forecast parameters for severe weather forecasting, and the ridges of these fields, or more specifically, the ridge …
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Investigation of the comma-head stability structure of wintertime mid-latitude cyclones using high-resolution observations
… campaign was to investigate the distribution of instability that leads to precipitation substructures found in the comma-head (wrap-around) region of wintertime cyclones. The wrap-around region is comprised of two sectors: northern and southern. The southern sector is characterized by dry air …
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Analysis of vertical velocities and elevated instability in the comma-head of continental winter cyclones
… 1 2 m s-1. The development and distribution of potential instability in the elevated convective region of one of these cyclones is examined using a Weather Research and Forecasting (WRF) model simulation. The strong 8-9 December 2009 cyclone is simulated with a large outer domain and …
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Synoptic and Mesoscale Dynamics of Snowbands in Winter Cyclones
… to radar observations; (2) Conditional symmetric instability did not contribute to the formation of the narrow bands, rather, the release of potential instability at the interface of the dry slot and the trowal led to the development of upright convection and initiated the narrow bands. As the …
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Single-player to Two-player Knowledge Transfer in Atari 2600 Games
… complexity of two-player environments and the potential instability in the training process. It is proposed that a reinforcement learning algorithm can train more efficiently and achieve improved performance in a two-player game by leveraging the knowledge from the single-player version of the …
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Analysis of periodic behavior of GPS time series at Pacoima Dam, California
… was installed at Pacoima Dam in order to monitor potential instability. The GPS system consists of 2 receivers, DAMI and DAM2, which are part of GPS network in Southern California. The displacement derived from the GPS receivers indicated that the dam's arch moves periodically with an annual …
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Design and analysis for a two level factorial experiment in the presence of dispersion effects
… variance structure. However, there is a potential instability of the variance estimates in the first stage that can lower the efficiency of the two-stage procedure. This problem can be addressed and the efficiency of the procedure enhanced if certain mild assumptions concerning the …
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Advanced dynamic response improvement methods for dc-dc power electronic converters
… including less dynamic response improvements, potential instability issues, electromagnetic interference problems, power stage complexity, controller complexity, significant additional cost, and large volume. In this dissertation, new approaches which are relatively simple and affordable have …
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Stability of Depletion Chamber Edges in Oil Sands Recovery Processes
… physical mechanisms of heat transfer, flow, and potential instability remain unresolved given the interplay of phase behavior, oil mobilization, heat transfer (conductive and convective), multiphase counter-current flow, and potential instabilities in steam-only, solvent-steam, and NCG-steam …
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Structure of an east coast cyclone derived from airborne radar and model diagnostics
… was nearly aligned with one of the WRF modeled potentially unstable layers. Elevated convection observed near cloud top exhibited updrafts of 2 to 3.5 m s-1 and was often located within layers of WRF modeled potential instability. Beneath the elevated convection were many enhanced reflectivity …
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Approximating the Heston-Hull-White Model
… the stochastic approximation displayed signs of potential instability. When ⌘ is small, the deterministic approximation is therefore recommended for use in applications such as calibration. With its shortcomings, the stochastic approximation could not be recommended. However, it did show …
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Stability of distribution networks connected with distributed generation
… generators onto distribution networks increases instability on the network, the quality of supply of that network would be degraded, therefore the connection of distributed generators must be limited or methods of improving the stability must be implemented. It is important to establish the …
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Transients in Electricity Networks with Distributed Generation
… of distributed generators (DGs) may also create potential instability due to the special characteristics of DG units and their low inertia. With the increase of DG penetration level, the overall dynamics of the power system may become significantly impaired. Thus, the increasing penetration of …
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Surface Patterning and Rotordynamic Response of Annular Pressure Seals Used in Turbomachinery
Rotordynamic instability problems in turbomachinery have become more important in recent years due to rotordynamic components with higher speeds and higher power densities. These features typically lead to increased instability risk in rotor dynamic components as fluids-structure interactions take …
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An essay on liability insurance and accident compensation and five papers on liability insurance
… layers of uncertainty for insurers and greater potential instability for liability insurance systems. Part 5 examines a connected issue: the relationship between liability insurance and liability rules, especially those of tort law. Here we consider the extent to which the existence or …
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Exploring methods to extract vertical motions in winter storms
… are then related to RUC profiles of equivalent potential temperature with respect to ice over the instrument site. These profiles were created from hourly forecasts from the model run prior to the arrival of the feature of interest. The time periods of deeper convection with vertical motions …
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Linkage mapping and genetic analysis of Trypanosoma brucei
… occur, however these findings do highlight the potential instability of the molecular karyotype of T.brucei in prolonged in vitro culture.
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Influence of external environment on fluid/ion transport in confined nanoscale systems
… model (DAAM). The concentration and electric potential are integrated in the radial direction. Furthermore, the convective fluid flow contribution plays an insignificant role in the mechanism, and hence, is neglected in my DAAM model. To understand the charge dynamics, I proposed a novel …
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THE INFLUENCE OF THE BACK FUNCTIONAL LINE ON LOWER EXTREMITY FRONTAL PLANE KINEMATICS AND KINEMATIC PREDICTORS OF LOADING DURING RUNNING
… gait cycle regardless of arm swing variation. Instability, either from asymmetrical movement patterns or poor single leg stability may contribute to the activation of the BFL muscle synergy. GM increased during the unilateral arm swing constraint during both phase and for both BFL synergies, …