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 12 of 12 for “"positioning device"”.
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Design of a 2D MRI compatible robot for performing prostate cancer treatment using therapeutic ultrasound
… In this thesis a prototype MRI compatible positioning device for the treatment of prostate cancer using therapeutic ultrasound is presented. The accuracy, MRI compatibility and functionality of the positioning device was evaluated in in vitro experiments (using gel phantoms and in vitro). …
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Development of a flexible manufacturing system (FMS)
… machines, a FANUC robot, a conveyor and a Robot Positioning Device (RPD) into a Flexible Manufacturing System (FMS). Also described are the benefits that South African manufacturers still using old CNC machines could achieve if they implemented a similar process in their organisation.
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Screw fixation of implants to the spine
… confirmed the potential for a simple screw positioning device and identified the need for an improved screw for osteoporotic bone. Determination of the compressive mechanical properties of 0.32 g.cm\(^{-3}\), 0.16 g.cm\(^{-3}\) and 0.09 g.cm\(^{-3}\) polyurethane foam enabled them to be used …
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An intelligent home using wireless location networks and real time messaging for patients with heart failure
… used in this project include Crickets, an indoor positioning device, handheld computers, and location tracking and instant messaging software. The proposed design and architecture for the intelligent home and the metrics it obtains are evaluated from both a theoretical and empirical standpoint. …
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Modeling and robust adaptive control of metal cutting via application of piezoactuator
… the cutting system as an important controllable positioning device for ultra-precision machining. With the application of piezoactuator, a much more accurate model is required for achieving the ultra-precision control. In this thesis, rather than using the commonly accepted linear Merchant model, …
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Design of a digitally actuated, micro-scale Cartesian nanopositioner
… to produce a small-scale, low-cost precision positioning device. Accurate motion manipulation on the nanometer level is one of the main challenges facing precision engineers today. With more developed nations' economies being driven in part by the growing telecommunications, photonics, and …
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Design, fabrication, and characterization of a motion stage for scalable imprinting of DNA nanowires
… system, particularly when a 3 degree of freedom positioning device is used. Herein, a 1 degree of motion stage with 3 independent, passive self-aligning mechanisms is demonstrated to achieve high performance at 3 times the scale of previous devices. The influence of kinematic coupling …
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Development of a vision-based local positioning system for weed detection
… an autonomous weed scout, a vision-based local positioning system for weed detection has been developed and tested in a laboratory setting. Four Line-detection algorithms have been tested and a robotic positioning device, or XYZtheta-table, was developed and tested. The Line-detection algorithms …
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Zur Kiefergelenkssymptomatik vor und nach bimaxillärer Osteotomie in zentrischer Kondylenposition mit Doppel-Zwischensplint - Eine prospektive klinische Untersuchung
Ziel dieser prospektiven Studie war, den Einfluß der bimaxillären Osteotomie auf die Kiefergelenkssymptomatik zu überprüfen. Zwischen Januar 1997 und März 2000 unterzogen sich 130 Patienten mit dentofazialen Anomalien einer bimaxillären Osteotomie an der Klinik und Poliklinik für Mund-, Kiefer- und …
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Zur Kiefergelenkssymptomatik vor und nach bimaxillärer Osteotomie - Eine retrospektive klinische Untersuchung
In dieser retrospektiven Studie wurde die Kiefergelenkssymptomatik nach bimaxillären skelettverlagernden Eingriffen unter besonderer Berücksichtigung der Verwendung einer intraoperativen Positionierungshilfe anhand der klinischen Funktionsanalyse, der Auswertung von prä- und postoperativen …
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Design, control and error analysis of a fast tool positioning system for ultra-precision machining of freeform surfaces
… structural design affects the achievable positioning stability. The goal of this study was to develop a tool positioning system capable of delivering fast motion with the required positioning accuracy and stiffness for ultra-precision freeform manufacturing. This goal is achieved through …