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Now showing items 11-20 of 4905
Design of an STM and EPL control system and linear actuator preload diaphragm
(Massachusetts Institute of Technology, 2007)
Increasing demand for nano-scale machining processes in the semiconductor industry necessitates new mechanisms for nano-machining. A system capable of nano-scale machining of conductive material via Electronic Pen Lithography ...
Design and process/measurement for immersed element control in a reconfigurable vertically falling soap film
(Massachusetts Institute of Technology, 2007)
Reinforcement learning has proven successful at harnessing the passive dynamics of underactuated systems to achieve least energy solutions. However, coupled fluid-structural models are too computationally intensive for ...
The behavior of rotator cuff tendon cells in three-dimensional culture
(Massachusetts Institute of Technology, 2007)
The rotator cuff is composed of the supraspinatus, infraspinatus, subcapularis, and teres minor tendons. Rotator cuff injuries are common athletic and occupational injuries that surgery cannot fully repair. Therefore tendon ...
Cell-seeded type II collagen scaffolds for articular cartilage tissue engineering
(Massachusetts Institute of Technology, 2007)
Defects in articular cartilage exhibit little spontaneous healing response, in part due to the limited number of chondrocytes available to infiltrate the defect and the absence of a provisional fibrin scaffold to accommodate ...
Propeller performance analysis using lifting line theory
(Massachusetts Institute of Technology, 2009)
Propellers are typically optimized to provide the maximum thrust for the minimum torque at a specific number of revolutions per minute (RPM) at a particular ship speed. This process allows ships to efficiently travel at ...
Development of experimental methods to measure osmosis-driven water flux and molecular transport across nanoporous graphene membranes
(Massachusetts Institute of Technology, 2015)
Graphene, an atomically thin planar lattice of sp2 bonded carbon atoms with high strength and impermeability, has drawn attention as a promising next generation high flux separation membrane. Molecular dynamics simulations ...
Valuing project financing using Monte Carlo simulation, with application to the expansion of a chemical company
(Massachusetts Institute of Technology, 2005)
The purpose of this thesis is to analyze the specific project value of a chemical company that undertook a major expansion in the late 1990s. The actual details of the investment were unique and conditional on the level ...
Redesign of the double hand rim modification of the "Whirlwind" Wheelchair for manufacture in developing nations
(Massachusetts Institute of Technology, 2004)
In this thesis, I investigate possible improvements to the design of a wheelchair for manufacture in a developing nation, specifically one designed for use by persons with hemiplegia. Ralf Hotchkiss's "Whirlwind" Wheelchair ...
Experimental simulation of wind driven cross-ventilation in a naturally ventilated building
(Massachusetts Institute of Technology, 2004)
A device was designed and constructed to simulate cross-ventilation through a building due to natural wind. The wind driver device was designed for use with a one tenth scale model of an open floor plan office building in ...
A low-cost defocus blur module for video rate quantified 3D imaging
(Massachusetts Institute of Technology, 2004)
Existing three-dimensional surface imaging systems are expensive, difficult to use, time consuming, and do not always provide the best accuracy or resolution. By using an offset aperture on a rotating disc, the 3D Monocular ...