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Now showing items 671-680 of 707
Improving heat capture for power generation in coal gasification plants
(Massachusetts Institute of Technology, 2011)
Improving the steam cycle design to maximize power generation is demonstrated using pinch analysis targeting techniques. Previous work models the steam pressure level in composite curves based on its saturation temperature ...
Nanocomposites as thermoelectric materials
(Massachusetts Institute of Technology, 2010)
Thermoelectric materials have attractive applications in electric power generation and solid-state cooling. The performance of a thermoelectric device depends on the dimensionless figure of merit (ZT) of the material, ...
Development of a nanostructure thermal property measurement platform compatible with a transmission electron microscope
(Massachusetts Institute of Technology, 2010)
Measurements of the electrical and thermal transport properties of one-dimensional nanostructures (e.g., nanotubes and nanowires) typically are obtained without detailed knowledge of the specimen's atomicscale structure ...
Mechanics of large-strain deformation of particle-modified polymers
(Massachusetts Institute of Technology, 2006)
Over the past several decades, engineering polymers have become increasingly prevalent in the manufacture of virtually all types of products. Polymers are substantially less dense than metals, easy to machine, and readily ...
Contraction and partial contraction : a study of synchronization in nonlinear networks
(Massachusetts Institute of Technology, 2005)
This thesis focuses on the study of collective dynamic behaviors, especially the spontaneous synchronization behavior, of nonlinear networked systems. We derives a body of new results, based on contraction and partial ...
Powered ankle-foot prosthesis for the improvement of amputee walking economy
(Massachusetts Institute of Technology, 2007)
The human ankle provides a significant amount of net positive work during the stance period of walking, especially at moderate to fast walking speeds. On the contrary, conventional ankle-foot prostheses are completely ...
Development of novel dynamic indentation techniques for soft tissue applications
(Massachusetts Institute of Technology, 2007)
Realistic material models to simulate the behavior of brain tissue at large deformations and high strain rates are necessary when designing equipment to protect against ballistic impacts. Acquiring experimental data for ...
Passive wake detection using seal whisker-inspired sensing
(Massachusetts Institute of Technology, 2015)
This thesis is motivated by a series of biological experiments that display the harbor seal's extraordinary ability to track the wake of an object several seconds after it has swum by. They do so despite having auditory ...
A liquid-in-glass thermometer with sub-microKelvin resolution, and its application for calorimetry
(Massachusetts Institute of Technology, 2006)
Labeling methods with optical readout are widely used to implement high throughput screens for drug discovery. However, labeling requires assay customization and does not allow examination of the reactants in their native ...
Multiscale micromechanical modeling of the thermal/mechanical properties of polymer/clay nanocomposites
(Massachusetts Institute of Technology, 2006)
Polymer/clay nanocomposites have been observed to exhibit enhanced thermal/mechanical properties at low weight fractions (We) of clay. Continuum-based composite modeling reveals that the enhanced properties are strongly ...