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 “"Turret"”.
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Experimental Investigation of an Actively Controlled Three-Dimensional Turret Wake
<p>Hemispherical turrets are bluff bodies commonly used to house optical systems on airborne platforms. These bluff bodies develop complex, three-dimensional flow fields that introduce high mean and fluctuating loads to the turret as well as the airframe support structure which reduce the …
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Control of Turbulent Flow Over an Articulating Turret for Reduction of Adverse Aero-Optic Effects
… on the hemisphere of a three dimensional turret. The hemisphere of the turret was capable of dynamically articulating in two degrees of freedom: pitch and azimuthal rotation. The experiments were performed in the Syracuse University wind tunnel at a Mach number of 0.1, giving a Reynolds …
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Tracking algorithms under boundary layer effects for free-space optical communications
… more difficult with the introduction of a turret on the aircraft for increased field-of-regard. In the case of a hemispherical turret, the disrupted airflow at the boundary layer can greatly distort the optical beam. A model of the communication link is created to compare the performance of …
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Structural and functional role of the extracellular loops and C-terminal domain of the voltage-gated sodium ion channel
… Nav channels include an extracellular turret region, whose role in channel function is poorly understood. The C-terminal domain (CTD) of Nav, connected to the DIV-S6, interacts with various other proteins including calmodulin (CaM) and fibroblast growth factor (FGF13) and mediates …
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Optimizing The Performance Of A Chip Shooter Machine
… placement sequence and feeder assignment for a turret style Chip Shooter machine often used in PCB assembly systems. This solution approach can be integrated into a process planning system to reduce assembly time and improve productivity. The Chip Shooter machine consists of three primary …
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Pursuit and Evasion of Drone Swarms and Turrets
… Problem with Time Windows (MTTSPTW). A defending turret must visit each attacking drone in the swarm once, as quickly as possible to counter the threat they pose. This constitutes a Shortest Hamiltonian Path (SHP) through the swarm subject to the time-window constraints of visiting each drone …
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Fault diagnosis based on causal reasoning
… reasoning and its application to a Mark 45 turret gun's lower hoist are described. HOIST is a system that performs fault diagnosis without the use of a domain expert or "shallow rules". Rather its "knowledge" is coded directly from a structural specification of the Mark 45 lower hoist. The …
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The design of a deep water catenary riser
… based upon a direct connection between an FPSO turret and riser whereas the second is a hybrid design in which the riser is supported by a sub-surface buoy which is hydraulically connected to an FPSO using flexible flowlines. This hybrid connection has the advantage of decoupling FPSO and riser …
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Fire and periodical cicadas: impacts on soil nutrients and understory plant germination
… <p>Through the soil analysis of cicada turrets, burned soil, and unburned soil, we hope to understand the composition of each soil type. Additionally, a 2 x 2 factorial study was performed with those same samples, providing insight into the impact on seed germination these disturbances …
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Hagia Sophia as a Facture: Originality through Appropriations
… are of Byzantine origin. By employing the south turret as the site of the minaret, the appropriation became a twofold strategy of preservation and innovation that ensured sacredness and continuity. An intertwined narrative was factured by complementing the material appropriation with deliberately …
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Reduction of Printed Circuit Card Placement Time Through the Implementation of Panelization
… pick-and-place (PAPM) machine, and the rotary turret head machine (RTHM). Two solution procedures are developed which are based upon a genetic algorithm (GA) approach. One procedure simultaneously produces solutions for the best panel design and component placement sequence. The other procedure …
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Microphysical Mechanisms in Stratiform Precipitation as Observed in OLYMPEX
… particles, and rimed particles in the central turret of an observed cell. The existence of rimed particles, led to the increase in reflectivity and decrease in differential reflectivity in this case.
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Advancing Tendon-Driven Robotic Systems: From Climbing Robots to String Actuators
… twisting modes. The design features a rotating turret that houses a winch and a worm gear transmission driven by a through-hole drive shaft. Models are developed for the combined displacement and velocity control of this system. Experiments validate the open loop model as well as the closed loop …
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Self-propelled rotary tool for turning difficult-to-cut materials
… affordability for the user. It was tested on a turret-type CNC lathe by machining AISI 4140 Steel that was heat treated to 54-56HRC and Grade 5 Titanium (Ti-6Al-4V). Carbide inserts with ISO designation RCMT 09 T3 00 (9.5mm diameter) were used during machining. Both the SPRT rotational speed and …
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Drag coefficient and damping of moorings and their effect on FPSO's response
… methods due to limited CD data for chains. A turret moored FPSO with 20 moorings operating in 400m water-depth is selected. Effects of environmental loads, including floater motions, current and waves, on the mooring line damping are investigated. Effect of random WF motions on mooring line …
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Diffraction phase microscopy for applications in materials science
… the given application by rotating the condenser turret in transmission, or adjusting the slider for the aperture diaphragm in reflection, which contain different size pinholes, allowing for a tradeoff between accuracy and speed. The setup also includes an automatic pinhole alignment system, …
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Study of correlation analysis for protein-protein interactions
… the connections between variability of turret region and the specificity of different toxins to their different target channels. We also found the negative linear relationship of residue pairs’ (from interface of the interacting protein pairs) correlation scores with their distances in …
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Interactions of insecticidal spider peptide neurotoxins with insect voltage- and neurotransmitter-gated ion channels
… block and are thus proposed to interact with the turret and/or loop region of the external vestibule of the insect BKCa channel. ƙ-HXTX-Hv1c has also been characterised to block the insect BKCa channel, while failing to modulate insect NaV and CaV channels. The unique insect-selective action of …