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Now showing items 21-30 of 40
Biomass to ethanol : potential production and environmental impacts
(Massachusetts Institute of Technology, 2008)
This study models and assesses the current and future fossil fuel consumption and greenhouse gas impacts of ethanol produced from three feedstocks; corn grain, corn stover, and switchgrass. A life-cycle assessment approach ...
Design of a high-speed, meso-scale nanopositioners driven by electromagnetic actuators
(Massachusetts Institute of Technology, 2008)
The purpose of this thesis is to generate the design and fabrication knowledge that is required to engineer high-speed, six-axis, meso-scale nanopositioners that are driven by electromagnetic actuators. When compared to ...
Nonlinear springs with applications to flow regulation valves and mechanisms
(Massachusetts Institute of Technology, 2008)
This thesis focuses on the application of nonlinear springs for fluid flow control valves where geometric constraints, or fabrication technologies, limit the use of available solutions. Types of existing nonlinear springs ...
Development of a wearable blood pressure monitor using adaptive calibration of peripheral pulse transit time measurements
(Massachusetts Institute of Technology, 2008)
The ability to continuously monitor a patient's blood pressure long-term (for hours, days, or weeks) using a wearable device as unobtrusive as a wristwatch or piece of jewelry, could revolutionize the study, diagnosis, and ...
A system identification approach to non-invasive central cardiovascular monitoring
(Massachusetts Institute of Technology, 2008)
This thesis presents a new system identification approach to non-invasive central cardiovascular monitoring problem. For this objective, this thesis will develop and analyze blind system identification and input signal ...
Optical characterization of thermal transport from the nanoscale to the macroscale
(Massachusetts Institute of Technology, 2008)
The thermal properties of thin films and material interfaces play an important role in many technologies such as microelectronics and solid-state energy conversion. This thesis examines the characterization of thermal ...
Enabling effective product launch decisions
(Massachusetts Institute of Technology, 2008)
The present work looks into the question of optimizing the performance of product launch decisions-in particular, the decisions of product development duration and manufacturing ramp-up. It presents an innovative model for ...
Microstructurally-based constitutive models of cytoskeletal networks for simulation of the biomechanical response of biological cells
(Massachusetts Institute of Technology, 2008)
The elastic and viscoelastic stress-strain behavior of cytoskeletal networks, important to many cellular functions, is modeled via a microstructurally-informed continuum mechanics approach. The force-extension behavior of ...
Vortex-induced vibration of marine risers : motion and force reconstruction from field and experimental data
(Massachusetts Institute of Technology, 2008)
Vortex-induced vibration (VIV) of long flexible cylindrical structures enduring ocean currents is ubiquitous in the offshore industry. Though significant effort has gone into understanding this complicated fluid-structure ...
Dynamic inventory management with expediting
(Massachusetts Institute of Technology, 2008)
In modern global supply chains, goods travel stochastically from suppliers to their final destinations through several intermediate installations such as ports and distribution facilities. In such an environment, the supply ...