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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 55 for “"Micro-electro-mechanical systems (MEMS)"”.
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Predicting the Effects of Dimensional and Material Property Variations in Micro Compliant Mechanisms
<p>Surface micromachining of micro-electro-mechanical systems (MEMS), like all other fabrication processes, has inherent variation that leads to uncertain material and dimensional parameters. To obtain accurate and reliable predictions of mechanism behavior, the effects of these variations need to …
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Emergency delivery of Vasopressin from an implantable MEMS rapid drug delivery device
… implantable rapid drug delivery device based on micro-electro-mechanical systems (MEMS) technology was designed, fabricated and validated for the in vivo rapid delivery of vasopressin in a rabbit model. In vitro characterization of device performance found the device capable of reliably and …
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Sensor Package Analysis and Simulation for Direct Sensor-to-Satellite Links
… the design and the performance of low-power microsensors that communicate directly to a satellite or a constellation of satellites. Information is spread using pseudo noise (PN) or Barker codes. The sensors use a single circular microstrip patch element with a wide beamwidth or a miniature …
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Cross-Linked PDMS Expansion Due to Submersion in Liquid and Supercritical CO2
<p>Characterization of micro/nano-copper particles impregnated Polydimethylsiloxane (PDMS) submersed in supercritical carbon dioxide (scCO2) was studied. The purpose of this investigation was to advance micro-corrosion sensor technology utilizing PDMS and micro-metal particle composite as the …
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Capacitive displacement sensing for the Nanogate
The Nanogate is a micro electro mechanical systems (MEMS) device that uses a cantilever structure to control the separation between two extremely flat surfaces. It has been proposed that the Nanogate be used as part of a nanoscale instrument for studying the behavior of fluids at the molecular …
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The Relevance of Potential Indicators of External Load for Movement Evaluation in Elite Football Training
… load monitoring strategy. Global Positioning Systems (GPS) incorporated into Micro-Electro-Mechanical Systems (MEMS) devices appear to be the technology that has been most widely adopted to determine activity (Akenhead & Nassis, 2016). The commonly used GPS technologies are regularly …
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Design and fabrication of a microneedle for the implantation of floating microstimulators
… components associated with the nervous system. Microelectrodes have been used in stimulating and detecting electrical activity in neurons. When stimulating or recording neural tissue activity using microelectrodes, there are usually many problems and difficulties in obtaining the correct …
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A Sensor for DNA Hybridization Using Fluorescence and Electrical Impedance Detection
… one method in which biorecognition events at the electrode surfaces can be obtained directly, without labeling, providing for rapid and simple analysis. This method has been used to optimize effects of the biosensor environment on the analytical signal, such as buffer volume, salt signal change …
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Advanced control of MEMS probing devices
… certain performance issues that arise in micro-electro-mechanical systems (MEMS). In particular, it focuses on applications such as nano-positioning, where control design becomes necessary to meet high resolution, bandwidth, and reliability (robustness) demands especially when there is …
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Design of surface micro-machined inertial MEMS sensor with meta-heuristic topology optimization
Micro-Electro-Mechanical Systems (MEMS) are getting popular for a variety of applications due to their small size, low cost, and good performance. MEMS devices are designed by combining simple shapes based on the experience of previous cases. Using mathematical design methods such as Topology …
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The feasibility of micromachined dynamic resonant beam coriolis true mass flow meter
The technological advances of micro-electro-mechanical systems (MEMS) in the past two decades have been remarkable for innovations in microfluidic systems as well as automotive applications such as pressure sensors and accelerometers. MEMS flow sensing has emerged as a field of interest in …
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Design and analysis of MEMS-based metamaterials
… provide material properties that are useful for electromagnetic applications but are not found in nature. Slight changes to a repeated unit cell can be used to tune the effective bulk material properties of a metamaterial, replacing the need to discover suitable materials for an application with …
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Development of kinematic coupling preload guidelines through design and testing of an adjustable micromanufacturing fixture
In the growing field of non-lithographic micromanufacturing, the ability to properly align a workpiece to a machine limits the attainable tolerances in micro-electro-mechanical-systems (MEMS) prototyping. This limit has created the need for a standard adjustable base for implementation into …
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A New Multifunctional MEMS-Based Piezoresistive Pressure Sensor for Monitoring Static, Acoustic, and Turbulent Events in Underwater Applications
… instrumentation. Of particular importance are micro-electro-mechanical-systems (MEMS) that combine reduced size and cost when compared to other relevant techniques. This work showcases the performance of Nanosonic Inc.'s MEMs-based piezoresistive pressure sensors; specifically, their …
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Microfluidic Columns with Nanotechnology-Enabled Stationary Phases for Gas Chromatography
Advances in micro-electro-mechanical-systems (MEMS) along with nanotechnology based methods have enabled the miniaturization of analytical chemistry instrumentation. The broader aim is to provide a portable, low-cost, and low-power platform for the real-time detection and identification of organic …
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Fluctuation-mediated interactions of atoms and surfaces on a mesoscopic scale
Thermal and quantum fluctuations of the electromagnetic near field of atoms and macroscopic bodies play a key role in quantum electrodynamics (QED), as in the Lamb shift. They lead, e.g., to atomic level shifts, dispersion interactions (Van der Waals-Casimir-Polder interactions), and state …
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Modeling and characterization of elastic wave propagation in micro-scale photonic crystals
Micro-scale phononic crystals are micro-electro-mechanical-systems (MEMS) made of one material periodically embedded in another material, leading to periodic changes in elastic properties of the composite structure. Such devices exhibit elastic bandgaps, which are very useful in many commercial …
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Distributed Algorithms for Tasking Large Sensor Networks
… developments in low-power circuit design and micro-electro mechanical systems (MEMS) have heralded the advent of compact and inexpensive wireless micro-sensor devices. A large network of such sensor nodes capable of communicating with each other provides significant new capabilities for …
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Semi-Packed Micro Gas Chromatography Columns
… (GC) is an important step in analytical systems for environmental monitoring, medical diagnosis, and forensic science. Due to its high resolving power, analysis speed, and small sample size, GC, has become the premier technique for separation and analysis of volatile and semi-volatile …
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