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 453 for “"PAD"”.
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Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing
… stiffness and damping coefficients for tilting-pad journal bearings (TPJBs) to measurements. Most have found that direct damping is consistently overpredicted. The thrust of this research is to explain the difference between measured and predicted stiffness and damping coefficients for TPJBs, …
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Vidová struktura slovesných derivátů kořene -pad-
… the system of verbal derivatives of the -pad- radix in 53 entries that comprise their dictionary definition, an analysis of characteristic valence structures and, above all, a large number of examples. More than thousand various records extracted from the Czech National Corpus and the …
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Punching shear in pad foundations on rock
… failure modes affecting reinforced concrete pad foundations on soils. The controlling parameter in the design of these foundations is found to be punching shear. The physical properties of sound rock under load suggest that a pad foundation on rock will exhibit a different behaviour than that …
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Modelling of pad support for foot osteoarthritis
… by the patient, a research of developing the pad support had been done. Development of pad support for osteoarthritis patient which is focused on big toe osteoarthritis become a subject of study and ABAQUS 6.13 software is selected as preferred software to design the geometry of pad support …
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A pseudo one-time-pad based security system
… there exists one scheme, the One-Time-Pad, that is theoretically unbreakable given that it satisfies certain requirements. The One-Time-Pad, however, is challenged by serious constraints due to inherent deployment problems. The purpose of this thesis is to outline a pseudo …
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Using a ferro-fluid pad to climb walls
The goal of this thesis is to build a wall climbing system that utilizes the viscosity property of ferrofluids. Ferrofluid viscosity is varies based on the magnetic field applied to it and this property enables ferrofluids to be used as an adhesive. This would allow a human, with a specially …
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Scratching by pad asperities in chemical mechanical polishing
… metal CMP. Metal CMP is the process of using a pad combined with an abrasive slurry to remove excess material, such as Cu, and planarize a surface. The continuing trend to increase the number of components per chip leads to the necessity of Cu features being increasingly small. This increases …
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Model-based nonlinear control of active tilting-pad bearings
… candidate for active operation is the tilting-pad bearing. The proposed active tilting-pad bearing has linear actuators that radially translate each pad. The use of feedback control in determining the actuator forces allows for the automatic, continuous adjustment of the pad position during the …
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Evaluation of a cool pad for thermoregulation in sows
… were conducted to evaluate the use of a cool pad as a thermoregulatory device for alleviating heat stress in farrowing and open sows. Different physiological and behavioral variables were analyzed during exposure of the animals to acute or long term heat stress in these studies. The …
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Physical Performance of Geomembranes Used in Heap Leach Pad Applications
… used as part of the liner system in heap leach pads. There is a need to quantify tensile strains in the geomembrane that could affect short-term puncture and long-term performance of the GMB. In this thesis, short-term tensile strains arising from indentations caused from the material placed …
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Background Stabilization And Motion Detection In Launch Pad Video Monitoring
Automatic detection of moving objects in video sequences is a widely researched topic with application in surveillance operations. Methods based on background cancellation by frame differencing are extremely common. However this process becomes much more complicated when the background is not …
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Funktionale und molekulare Charakterisierung des Pad-Proteins von Legionella pneumophila
In der vorliegenden Arbeit wurde das Pad-Protein von Legionella pneumophila mit zell- bzw. molekularbiologischen sowie immunochemischen Methoden charakterisiert. Mittels Einbau des mutierten Pad-Locus, kodiert auf dem Plasmid pCS-25, in das Genom der L. pneumophila Stämme WH88 (Serogruppen 6) bzw. …
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Automated visual inspection for the quality control of pad printing
Pad printing is used to decorate consumer goods largely because of its unique ability to apply graphics to doubly curved surfaces. The Intelpadrint project was conceived to develop a better understanding of the process and new printing pads, inks and printers. The thesis deals primarily with the …
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Multifaceted approach for the analysis of rail pad assembly response
… operating costs. Improvements to the rail pad assembly, the component responsible for attenuating loads and protecting the concrete crosstie rail seat, will enhance the safety and efficiency of the track infrastructure. Lateral, longitudinal, and shear forces exerted on the components of …
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Unconventional Swept Rotor Design using Open Vehicle Sketch Pad (OpenVSP)
Rotors are a crucial component of VTOL(vertical take-off and landing) devices like unmanned aerial vehicles (UAVs) or helicopters, etc., By generating a rotational force, they create the necessary thrust to lift and maneuver the vehicle in the air. In recent years, there has been a growing emphasis …
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Micro-scale scratching by soft pad asperities in chemical-mechanical polishing
… planarization. In the CMP process, polishing pads, typically made of polyurethanes, play a key role. Due to the random, rough surface of the pad, only the tall asperities contact the wafer and transmit the necessary down force and motion to the abrasive particles for material removal. As the …
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Effect of chemical mechanical planarization processing conditions on polyurethane pad properties
… of one of the consumables - the CMP soft pad. During the CMP process, the pad is subjected to high temperatures and chemicals from the slurry. Thus, the properties of the pad can be irreversibly changed, affecting the planarity of the resultant wafer. In this study, the CMP processing …
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Analysis of tilting-pad oil seals for high pressure centrifugal compressors
… uses a combination of ring seals and tilting pad bearing elements. The stable tilting pad is used to center the heavily grooved seal element. The eight stiffness and damping coefficients which represent the hydrodynamic forces between the journal and the seal assembly are computed by an …
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Microwave sensing of bulk electrical properties of tank track pad rubber
A complex permittivity measurement system composed of a network analyzer and a open-ended coaxial waveguide has been used to evaluate the permittivity of rubber samples. The conductivity of rubber provides an indication of the dispersion of carbon black throughout the rubber matrix. The technique …
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Design, Fabrication, and Testing of a Proprioceptive Electroadhesion Pad for Space Applications
… was performed on various electroadhesion pad designs in order to compare field intensities. In order to obtain optimum surface adhesion, the use of Macro Fiber Composite (MFC) actuators were embedded on the electroadhesion pad. Fabrication methods involving the use of chemical etching …
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