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Now showing items 11-20 of 57
Numerical modeling of piston secondary motion and skirt lubrication in internal combustion engines
(Massachusetts Institute of Technology, 2007)
Internal combustion engines dominate transportation of people and goods, contributing significantly to air pollution, and requiring large amounts of fossil fuels. With increasing public concern about the environment and ...
Investigation of nanoscale thermal radiation : theory and experiments
(Massachusetts Institute of Technology, 2007)
The ability to control the radiative properties of objects is of prime importance in diverse areas like solar and thermophotovoltaic energy conversion, narrowband thermal emitters, and camouflage in military applications. ...
A wearable blood pressure sensor using oscillometric photoplethysmography and micro accelerometers
(Massachusetts Institute of Technology, 2007)
Monitoring arterial blood pressure (ABP) with a sensor virtually imperceptible to the wearer, for continuous periods of weeks, months, or years, could prove revolutionary in the diagnosis and treatment of chronic hypertension ...
A thermo-mechanical finite deformation theory of plasticity for amorphous polymers : application to micro-hot-embossing of poly(methyl methacrylate)
(Massachusetts Institute of Technology, 2007)
Amorphous thermoplastic polymers are important engineering materials; however, their nonlinear, strongly temperature- and rate-dependent elastic-visco-plastic behavior has, until now, not been very well understood. The ...
Electrokinetic trapping of biomolecules : novel nanofluidic devices for proteomic applications
(Massachusetts Institute of Technology, 2007)
Sample preparation has long been the most important and costly process in bioanalyses. Conventional identification methods involve multiple purification steps combined with mass spectrometry or immunosensing. While ...
Nonlinear dynamics of three dimensional fluid flow separation
(Massachusetts Institute of Technology, 2007)
Flow separation (the detachment of fluid from a no-slip boundary) is a major cause of performance loss in engineering devices, including diffusers, airfoils and jet engines. The systematic study of flow separation dates ...
Design of a high-speed-force-stroke thermomechanical micro-actuator via geometric contouring and mechanical frequency multiplication
(Massachusetts Institute of Technology, 2007)
The aims of this research were to understand (1) why marked performance improvements are observed when one contours the geometry of micro-thermomechanical actuators (pTMAs), (2) how to parametrically model and optimize ...
Robust adaptive control of switched systems
(Massachusetts Institute of Technology, 2007)
In this thesis, robust adaptive controllers are developed for classes of switched nonlinear systems. Switched systems are those governed by differential equations, which undergo vector field switching due to sudden changes ...
A body area network for wearable health monitoring : conductive fabric garment utilizing DC-power-line carrier communication
(Massachusetts Institute of Technology, 2007)
Wearable computing applications are becoming increasingly present in our lives. Of the many wearable computing applications, wearable health monitoring may have the most potential to make a lasting positive impact. The ...
A continuum constitutive model for amorphous metallic materials
(Massachusetts Institute of Technology, 2007)
A finite-deformation, Coulomb-Mohr type constitutive theory for the elastic-viscoplastic response of pressure-sensitive and plastically-dilatant isotropic materials has been developed. The constitutive model has been ...