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 “"microcircuit"”.
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CREEP CORROSION OVER PLASTIC ENCAPSULATED MICROCIRCUIT PACKAGES WITH NOBLE METAL PRE-PLATED LEADFRAMES
Field failures were observed to be caused by the bridging of corrosion products across lead fingers. This phenomenon was identified as creep corrosion and was the motivation for this work. This dissertation advances the state of knowledge on the creep corrosion process and the strategies for …
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Understanding the nervous system as an information processing machine: dense, nonspecific, canonical microcircuit architecture of inhibition in neocortex . . .
This thesis is the combination of two separate lines of work linked by one common goal: understanding the nervous system as an information-processing machine. David Marr (1982) put forth the idea that in order to fully understand an information-processing machine one must understand it at three …
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Measurements of Cooling Effectiveness Along the Tip of a Turbine Blade
… examines a novel cooling technique called a microcircuit, which combines internal convection and pressure side injection on a turbine blade tip. Holes on the tip called dirt purge holes expel dirt from the blade, so other holes are not clogged. Wind tunnel tests are used to observe how …
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Heat Transfer Coefficient and Adiabatic Effectiveness Measurements for an Internal Turbine Vane Cooling Feature
… cooling scheme for turbine airfoils, called microcircuit cooling, in which small cooling channels are located extremely close to the surface of a turbine airfoil. Coolant bled from the compressor passes through the microcircuits and exits through film cooling slots. On further cooling benefit …
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Film Cooling Predictions Along the Tip and Platform of a Turbine Blade
… flow losses, which are inherent to engines, and microcircuit channels. Parasitic losses included dirt purge holes, located along the blade tip, and platform leakage flow, which result from gaps between various turbine components. Microcircuits are a novel cooling technique involving small air …
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Mapping the Neural Circuits That Modulates the Molecular Switch Between Alternative Interval Timing Behaviours in Drosophila Melanogaster
… In Drosophila melanogaster, two well-defined microcircuits (Longer-Mating-Duration (LMD) and Shorter-Mating-Duration (SMD)), are used to understand the underlying mechanisms of how neuropeptide interactions modulate temporal information in mating behaviours. In our study, we investigated the …
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Comparison of the Thermal Performance of Several Tip Cooling Designs for a Turbine Blade
… method is a novel cooling technique called a microcircuit, which combines internal convection and injection from the pressure side near a turbine blade tip. Wind tunnel tests are used to observe how effectively these designs cool the tip through adiabatic effectiveness measurements and …
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Adiabatic Effectiveness Measurements of Leakage Flows along the Hub Region of Gas Turbine Engines
… study examines a novel cooling feature, called a microcircuit, which combines internal convective cooling with external film cooling. For the experimental investigation, scaled up blades were tested in a low speed wind tunnel. Adiabatic effectiveness measurements were made with infrared …
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Distributed parameter RC network analysis
… determine the parameters R and C of a uniform RC microcircuit from transient measurements are included"--Abstract, page ii.
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Exploring a behavioral role for presynaptic inhibition at spinal sensory-motor synapses
… refinement by spinal inhibitory microcircuits. One microcircuit that has been implicated in the regulation of sensory input establishes inhibitory synapses directly on the central terminals of sensory neurons. To date, however, the difficulty in gaining selective access to …
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Striatal Microcircuits Underlying Control of Actions
… of experiments (Chapter 3) examined a striatal microcircuit underlying pursuing behavior. The SPNs and FSIs in the striatum compose a striatal microcircuit that provides a feedforward inhibition circuit in which glutamatergic inputs excite the FSIs that then inhibit the SPNs. By using 3D motion …
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The effect of Alzheimer's disease on cortical microcircuits
… disease mechanisms at the level of cortical microcircuits and their cells or receptors. The cortical generators underlying the neurophysiological deficit are assessed in chapters 4, 5 and 6. Chapter 4 tests the hypothesis that Alzheimer’s disease affects the gain and connectivity of pyramidal …
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Effects of Sand Ingestion on the Film-Cooling of Turbine Blades
… new trailing edge cooling methodology know as a microcircuit. It was shown that increasing the airflow or pressure ratio, or decreasing the sand amount would result in decreased blockage. It was also shown that over a certain metal and coolant temperature, the blockage is significantly worsened. …
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Selective Neuronal Vulnerability in Neocortices from Patients with C9ORF72-related Neurodegeneration
… relative sparing of layer 6, I hypothesised that microcircuit connectivity might determine vulnerability. I investigated this hypothesis using Visium (Chapter 4). Three lines of evidence support the L6 sparing previously inferred from snRNA-seq. First, inferred vulnerable populations are located …
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Experiments on the Thermal, Electrical, and Plasmonic Properties of Nanostructured Materials
… rectification has the potential to enhance microcircuit performance, improve thermoelectric efficiency, and enable the creation of thermal logic circuits. Passive thermal rectification has been proposed to occur in geometrically asymmetric nanostructures when heat conduction is dominated by …
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Songbird Brain Organization and its Molecular Convergence with Humans for Vocal Imitation Learning
… results offer strong evidence of an analogous microcircuit between two spatially distinct regions in songbirds and two layers of a cortical column in humans for vocal imitation. We molecularly profiled the song system of the budgerigar parakeet to test for further convergence in the parrot …
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Internal Heat Transfer and External Effectiveness Measurements for a Novel Turbine Blade Cooling Design
… cooling schemes for turbine airfoils, called microcircuits. Microcircuits are placed inside the turbine blade wall, and the features turbulate the air and increase heat transfer surface area, thereby augmenting convective cooling. The coolant flow then exits internal cooling passages to the …
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Neocortical Layer 4 to Layer 2/3 Sensory Information Processing Investigated with Digital-Light-Projection Neuronal Photostimulation
… mammalian brain forms neuronal networks and microcircuits with cell-type- and anatomical-specific synaptic connections. Despite great advances in elucidating the cellular physiology of the nervous system, little is known about the computational processes occurring at the level of neuronal …