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 212 for “"Device Design"”.
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Magnetostatic Modeling for Microfluidic Device Design
<p>Magnetostatic Modeling for Microfluidic Device Design</p> <p>Kirsten Marie Jackson</p> <p>For several years, biologists have used superparamagnetic beads to facilitate biological separations. More recently, researchers have adopted this approach in microfluidic devices [1-3]. This recent …
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Measurement and device design of left-handed metamaterials
… shown to be consistent with theory. A four-port device utilizing the dispersive nature of an LHM prism is designed and measured. The measurements show that the refraction angle of an incident signal is frequency dependent. Two ports are constructed to receive the positively refracted and …
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Improvements to solar thermoelectric generators through device design
A solar thermoelectric generator (STEG) is a device which converts sunlight into electricity through the thermoelectric effect. A STEG is nominally formed when a thermoelectric generator (TEG), a type of solid state heat engine, is placed between a solar absorber and a heat sink. When the solar …
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Ventricular assist device design and analysis : a computational approach
Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1996.
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An ultrasound probe sheathing device : design, development, and evaluation
… the sterile barrier. This paper presents the design, development, and evaluation of a probe holder and cartridge-style, single-use applicator that returns high quality ultrasound images and sheaths ultrasound transducers 35% faster than the current technique with a decreased risk of breaking …
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Wide Area Power System Monitoring Device Design and Data Analysis
… (FDR) is a cost effective data acquisition device used to measure power system frequency at the distribution level. FDRs are time synchronized via the global positioning system (GPS) timing and data recorded by FDRs are time stamped to allow for comparative analysis between FDRs. The data is …
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Ultra Low Power SubThreshold Device Design Using New Ion Implantation Profile
… of the important aspects of integrated circuit design is doping profile of a transistor along its length, width and depth. Devices for super-threshold circuit usually employ halo and retrograde doping profiles in the channel to eliminate many unwanted effects like DIBL, short channel effect, …
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Device design factors for enhancing the functionality of chronic intracortical microelectrodes
<p>Intracortical microelectrodes are devices used in brain-computer interfaces (BCI) to help regain lost motor, sensory, and cognitive functions of individuals with neurological disorders. However, the long-term performance of microelectrode arrays is hampered by a series of inflammatory tissue …
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Materials and device design for MEMS piezoelectric mechanical vibration energy harvesters
… efficient electronics, and fabrication of devices, modeling is an indispensable element in predicting and designing PVEHs. Here, an improved electromechanically-coupled model is developed including the ability to analyze proof mass effects and different electrode configurations. Although …
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Device design and process technology for sub-100 nm SOI MOSFET's
… used. However, PDSOI MOSFET's are difficult to design due to floating-body effects. FD-SOI MOSFET's are easier to design and are more scalable than PD-SOI MOSFET's. However, in the sub- 100 nm gate length regime, fully-depleted SOI MOSFET's are difficult to manufacture because a bottom gate is …
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Tube-forming device design for the creation of cell-integrated alginate tubes
… any two fluids used in this reverse dip-coating device that the tube wall thickness will be approximately equal to 2/3 the gap width as gap width becomes negligible. Robustness testing of the tube-forming device prompted two base unit designs and a protocol in order to achieve coefficient of …
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Conditioning planaria : device design based on an autonomous, large-scale parallel approach
… an attempt to instrument at an organism level, a design for an environment that automatically conditions multiple planaria in parallel was produced. This design consisted of a testing chamber that could stimulate the planaria using electrical shock and light. A computer program was also written to …
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Singlet exciton fission-enhanced silicon photovoltaics: Interfacial engineering, device design and spectroscopic technique development
… to up to 42 %. The greatest challenge with these devices has been to demonstrate an increase in the silicon photocurrent, a necessary condition to show that the technology is viable. Scientifically, there are three main components to this problem. The first is to successfully couple the triplet …
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The Storytelling + Design Framework: Design Guidance for the Concept Phase of Medical Device Design
… Safety and Health’s (NIOSH) “Prevention through Design” (PtD) initiative encourages the exploration of different methods to foster dialogue between engineers and healthcare workers. Although engineers are encouraged to follow a user-centered design (UCD) process to identify user needs (ANSI/AAMI, …
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Investigation of Cellular Responses Activated by Mechanical Compression in Equine Chondrocytes: Device Design, Construction and Testing
… a simple oscillatory displacement controlled device was designed to provide uniaxial unconfined strain to cell constructs. Static compression and dynamic compression with various waveforms are utilized with a stroke range of 0.25 mm to 4 mm and a frequency range of 0.1 Hz to 3 Hz. …
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Image-Based Morphological Modeling of Soft and Bony Tissue with Applications in Prognostics and Medical Device Design
Improvements in non-invasive imaging and three-dimensional visualization techniques permit highly detailed morphological analyses of internal organs. Morphometric quantification of bony and soft tissue anatomy from computed tomography (CT) and magnetic resonance 1 images is used to quantify shape …
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Integrable and Integrated Optoelectronic Devices Grown by Metalorganic Chemical Vapor Deposition
… several integrable and integrated optoelectronic devices grown by metalorganic chemical vapor deposition (MOCVD) crystal growth. The emphasis is on device design and fabrication using crystal growth techniques to minimize post-growth processing and add design flexibility.
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Semiconductor Laser Arrays Grown by Metalorganic Chemical Vapor Deposition
… laser structures and are presented along with device design criteria.
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Use of IGT/COMFET in zero current quasi resonant converters
The problems associated with IGT/COMFET devices in PWM converters, such as turn off current tailing and latching are largely avoided in a resonant converter. Dynamic saturation loss is identified as the predominant power loss in IGT/COMFET devices for very high frequency resonant operation. Device …
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Shape grammar for medical injectors
… thesis explores the applicability of algorithmic design for biomedical device design through the use of the shape grammar formalism. This method is expressed as an algorithm that describes the computational mechanism for composing shapes utilizing symbols, geometry, and algebraic operations. The …
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