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 21 for “"sags"”.
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Biochemical and Immunological Mechanisms Underlying Differential Interaction of Superantigens with Host Immunogenetic Factors in Streptococcal Sepsis
… triggered by streptococcal superantigens (Strep SAgs). SAgs interact simultaneously with HLA class II molecules on antigen presenting cells (APC) and with the T cell receptor beta chain variable elements (TCR V) and cause excessive stimulation of both cell types and massive release of …
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Acoustic communication in the North Atlantic right whale (Eubalaena glacialis)
… been documented. Different group compositions in SAGs indicate that both potentially reproductive and non-reproductive groups have been combined under one labeL. Sound production in SAGs suggests that females form and maintain the groups by producing Scream calls. Males produce Upcalls to …
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The role of superantigens during Staphylococcus aureus nasal colonization and infection
Superantigens (SAgs) are potent toxins produced by bacteria such as Staphylococcus aureus that function to overactivate T cells resulting in massive cytokine production and immune activation. Despite decades of research on the structure and function of these proteins, as well as their role in …
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Engineering the T Cell Receptor to Protect Host Cells in Superantigen-Induced Septic Shock
Superantigens (SAgs) are potent pathogenic agents. Produced by bacteria and viruses, these proteins target a subset of white blood cells, namely T cells, which are responsible for the cell-mediated responses of the immune system. SAgs stimulate T cell populations by crosslinking a T cell receptor …
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On-line Dynamic Security Assessment in Power Systems.
… a group of generators can cause critical voltage sags at certain buses in the system. In this thesis assessment of such voltage sags is proposed using two types of sensitivities, which are derived from the algebraic network equations. These sensitivities are derived after an in-depth study of the …
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Analyzing voltage sag direction using protective relays and deep-learning methods
… methods of identifying the direction of voltage sags in the distribution circuits. Voltage sags arise from the presence of short-circuit faults involving single, double, and three phase-to-ground conditions. The direction of the fault is based on the direction of power flow before the occurrence …
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Dynamic modeling and vibration control of high-voltage overhead transmission lines
… cables, coupled with the large spans and large sags involved, make the dynamic response of the system highly nonlinear. In this study, we numerically investigate the damped free-vibration response of systems of cables of particularly large spans (120, 200 and 400m).
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Modeling of industrial power distribution circuits for voltage sag and fault analysis
… sensitive electrical loads during voltage sags. The study begins by discussing the modeling procedure for induction motors based on manufacturer datasheets. It then investigates and develops a 24-pulse variable frequency drive (VFD) model in EMTP. The functionality of the VFD model is …
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Modeling and Analysis of a Dynamic Voltage Regulator
… of renewable energy sources, random voltage sags, swells and disruptions are already a major issue in power systems. Recent advances in power electronic devices have provided a platform for new solutions to the voltage support problem in power systems. One promising solution is the Dynamic …
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Virtual Synchronous Machine based Fuzzy V-F Control for VSC of Battery Storage System for Seamless Performance of Microgrid
… transients as well as voltage swell and sags during the fault. The performance of fuzzy logic control is validated for seamless transition of microgrid from both the modes of operation through simulation in MATLAB/Simulink environment.
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Islanding Detection and Cybersecurity in Inverter-Based Microgrids Under a High-Noise Environment
… transients, harmonics, grounding issues, voltage sags, voltage swells, electromagnetic interference, and power quality issues that affect islanding detection. Transient events, like lightning-induced traveling waves can also introduce noise levels exceeding the voltage amplitude, disturbing …
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Low Voltage Ride-Through for Indirect Matrix Converter Based Open-End Winding Drives
… faults could create over-voltages or voltage sags (sags are more frequent than over-voltages) and many commercial drives address the voltage sag problem with a ride-through solution for up to 30 cycles of interruption. Ride-through solutions include usage of storage devices, modification of …
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Técnicas de análisis exploratorio de datos y estrategias de visualización multidimensional del suministro eléctrico basadas en estadísticos de orden superior: indicadores globales para instrumentación moderna
… de eventos sintéticos y de eventos reales como sags, y del 29.79% para transitorios impulsivos reales. En comparación con métodos tradicionales, las herramientas desarrolladas ofrecieron mejoras significativas en la detección de eventos como notches (73%), transitorios impulsivos (54%) y spikes …
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Risk Management of Cascading Failure in Composite Reliability of a Deregulated Power System with Microgrids
… induced by overgrown vegetation, voltage sags, line and transformer overloading, transient instabilities, voltage collapse, to cite a few. How to control the economic losses of blackouts is gaining a lot of attention among power researchers. In this research work, we develop new Monte …
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Engineering soluble, high affinity T cell receptor domains for detection of staphylococcal and streptococcal exotoxins
… cytokine release from both cell types. Although SAgs bind with low affinity to the variable region of the beta chain (Vβ) of the TCR, they are very potent toxins. These toxins have been incriminated in food poisoning, sepsis, toxic shock syndrome (TSS), infective endocarditis, and skin conditions …
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Applied geology in the Beulah-Hazen area, Mercer County, west-central North Dakota
… Renner trench were recognized by drilling and sags in the topography. At least three fills reveal multi-stage origins for diversion trenches. The second fill is believed to have been laid down in an ice-dammed lake. The third fill was deposited as a wall-to-wall fill between Beulah and Hazen, …
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Systems Biology Approach to Identifying Host Interactive Pathways Modulating the Severity of Streptococcal Sepsis
… molecules present streptococcal superantigens (SAgs) to T cells, and variations in HLA class II molecules can strongly influence SAg responses. However, the bacteria produce a very large number of additional virulence factors that participate in the pathogenesis of this complex disease, and it …
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
… adaptive algorithm and is shown to detect sags faster than previous sag detection techniques. A simple mitigation strategy is employed to illustrate the effectiveness of diverting the excess energy once the sag is detected. The proposed strategy is simple and easy to incorporate as part of …
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
… adaptive algorithm and is shown to detect sags faster than previous sag detection techniques. A simple mitigation strategy is employed to illustrate the effectiveness of diverting the excess energy once the sag is detected. The proposed strategy is simple and easy to incorporate as part of …
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Reactive power compensation of fixed speed wind turbines using a hybrid wind turbine technology
… wind farm, there is a reduction in grid voltage sags while the FSWT-based wind farm experiences an improvement in its output power and reactive power profile while it rides through a fault condition.
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