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 51 for “"Joint design"”.
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Rolling contact orthopaedic joint design
… the practice of rebuilding diseased biological joints using engineering materials, is often used to treat severe arthritis of the knee and hip. Prosthetic joints have been created in a "biomimetic" manner to reconstruct the shape of the biological joint. We are at a disadvantage, however, in …
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Dual position locking joint design for a medical walker
In this thesis we analyzed a joint created for a medical walker currently in the prototyping stage of development. The walker is designed to help a user stand up from a seated position. The joint holds two legs of the walker together in an 'x' shape. It must be able to lock in two positions and …
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Fundamental Limits and Joint Design of Wireless Systems with Vector Antennas
… work on multiple antennas has focused on the design of coding and modulation schemes, channel estimation algorithms and decoding architectures. Information is sent by the transmitter as electromagnetic (EM) waves which subsequently undergo multipath fading before they reach the receiver. The …
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Joint design of multi-resolution codes and intra / inter- layer network coding
In this thesis, we study the joint design of multi-resolution (MR) coding and network coding. The three step coding process consists of MR source coding, layer coding and multi-stream coding. The source coding considers the allocation of codeword length to the two layers and use base layer …
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Design outsourcing in the high-tech industry and its impact on supply chain strategies
The practice of outsourcing product design to a service provider is prevalent in fast-moving high-tech electronics. Product design affects all subsequent activities such as procurement, manufacturing, logistics and after-sales services. Thus, companies do design for supply chain (DFSC), which is …
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A Study of Durability for Elastomeric Fuel Cell Seals and an Examination of Confinement Effects in Elastomeric Joints
… of confinement have been evaluated for a bonded joint with varying thickness along the bonded direction. The Dreaming project is a glass art project in Fredrick, MD which incorporates such a varying thickness joint where thermal expansion of the adhesive has caused the glass adherend to break and …
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Ultrasonic Attenuation In As-Deposited Inconel 182 Weld Metal and Recommended Techniques for Discontinuity Evaluation.
… pressure retaining bi-metallic and tri-metallic joints involving as-deposited austenitic weld material. The weld joint design was one simulating a component on a nuclear reactor known as a safe-end-to-nozzle. Because the joint is part of a nuclear reactor, explicit design requirements are set …
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An experimental study of the one Atmosphere Diving Suit (ADS) and data analysis of military diving
… specifically that associated with joint rotation, lacks natural movement and range of motion, rendering most normal underwater tasks more challenging and taxing on the operator. Concerns about the lack of maneuverability and usability of the current ADS, primarily raised by the US …
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Structural Performance of Longitudinally Post-Tensioned Precast Deck Panel Bridges
… force, shear stud pocket placement, and proper joint design. In a recent dissertation (Swenty 2009) numerous recommendations were made for joint design, shear stud pocket design, and post-tensioning force for full-depth precast deck panel bridges. Design drawings were included for the …
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Design and construction of a double-octahedral variable geometry truss manipulator
This thesis deals with the design and construction of a variable geometry truss (VGT) of the double-octahedral (pyramid-pyramid) geometry. The truss is expected to be the focus of several experimental research projects. In this thesis, a kinematic model is formulated, and the forward and inverse …
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Retransmission strategies for moving networks over ricean fading channels
The problem of designing retransmission protocols based on Hybrid Automatic Repeat reQuest (HARQ) for moving networks over Ricean fading channels has been considered. The scenario of interest consists of one receiver traveling at a given speed while connected to a wireless network based on OFDM …
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Indeed: An active database for concurrent engineering
Concurrent engineering is a methodology for design which is increasing in popularity at large manufacturing organizations. Because of this methodology's focus on group rather than individual productivity, many computer-based tools do not provide adequate support. This thesis describes a model for …
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Design and analysis of a flexible tendon-driven joint for in-pipe inspection robots
… leak detection. This work discusses the design, prototyping, and analysis of a tendon-driven flexible robotic joint that connects the sub-modules of an in-pipe snake-like robot. A simple, robust, well-sealed, and waterproof joint design is proposed. It enables the robot to handle complex …
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Design of Automotive Joints Using Response Surface Polynomials and Neural Networks
In the early design stages of a car body, a simplified model, which represents the constituent components of the car body by their performance characteristics, is used to optimize the overall car. The determined optimum performance characteristics of the components are used as performance targets …
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Design of multidimensional radiofrequency pulses in magnetic resonance imaging
… has been developed in one-dimensional RF pulse design, multidimensional RF pulse design remains an open question. The primary challenges are: a) the nonlinearity of the governing Bloch equation, inaccurate treatment of which can cause excitation pattern distortions in the large-tip-angle regime; …
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Innovative Design Concepts for Insulated Joints
… this research is to develop new and innovative designs for insulated rail joints for improved life cycle and higher cost effectiveness. The research focuses on using electrically insulating materials that replace the epoxy used in current bonded insulated joints. Insulated joints (commonly known …
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Design and optimisation of adhesively bonded overlap joints
… and composite materials. The most common joint configuration is the lap shear joint, which has been investigated widely and several ideas have been proposed to improve its performance. For example, the introduction of fillets at the overlap ends or tapering of the substrates can reduce the …
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Throughput and complexity tradeoffs in the multi-antenna downlink
This thesis considers the joint design of the multiplexing and scheduling of independent data streams for the Gaussian multiple-input multiple-output (MIMO) broadcast channel. It is well known that the use of multiple transmit antennas can greatly increase the capacity of the broadcast channel. …
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DNA Origami Mechanisms and Machines
… scaffolded DNA origami as a viable approach to designing and fabricating nanoscale mechanisms and machines. The work presented shows a fundamental proof-of-concept for the fabrication of DNA Origami Mechanisms and Machines (DOMM). The scope of the project is to design, fabricate, and analyze DNA …
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