Browsing Aeronautics and Astronautics - Ph.D. / Sc.D. by Title
Now showing items 376-395 of 710
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A machine learning approach to modeling and predicting training effectiveness
(Massachusetts Institute of Technology, 2015)Developments in online and computer-based training (CBT) technologies have enabled improvements in efficiency, efficacy, and scalability of modern training programs. The use of computer-based methods in training programs ... -
Macro-scale investigation of high speed gas bearings for MEMS devices
(Massachusetts Institute of Technology, 2000)A macro-scale experimental test facility for investigating high-speed gas bearings for MEMS devices such as the MIT Micro-Engine is presented along with results from subsequent experiments. It is shown that the bearings ... -
Managing uncertainty in space systems conceptual design using portfolio theory
(Massachusetts Institute of Technology, 2002)One of the most significant challenges in conceptual design is managing the tradespace of potential architectures-choosing which design to pursue aggressively, which to keep on the table and which to leave behind. This ... -
Manufacturing and fracture of hierarchical composite materials enhanced with aligned carbon nanotubes
(Massachusetts Institute of Technology, 2014)Hierarchical advanced composite structures comprised of both nano- and micro-scale fibers are currently being studied as next-generation materials for multifunctional aerospace applications. Carbon nanotubes (CNTs) are an ... -
The Mars Gravity Biosatellite as an innovative partial gravity research platform
(Massachusetts Institute of Technology, 2008)The Mars Gravity Biosatellite is an unprecedented independent spaceflight platform for gravitational biology research. With a projected first launch after 2010, the low Earth orbit satellite will support a cohort of fifteen ... -
Material characterization and modeling for piezoelectric actuation and power generation under high electromechanical driving levels
(Massachusetts Institute of Technology, 2002)High electromechanical loads parallel to piezoelectric polarization might result in depolarization of the material, depending on the material property itself and the external excitations such as electrical field, electrical ... -
A mathematical study of the controlled motion of airplanes
(Massachusetts Institute of Technology, 1939) -
Measurement of the mass flow and tangential momentum accomodation coefficient in silicon micromachined channels
(Massachusetts Institute of Technology, 1997) -
The measurement sharing approach to community relative navigation
(Massachusetts Institute of Technology, 1984) -
Measuring space systems flexibility : a comprehensive six-element framework
(Massachusetts Institute of Technology, 2005)Space systems are extremely delicate and costly engineering artifacts that take a long time to design, manufacture, and launch into space and after they are launched, there is limited access to them. Millions of dollars ... -
Mechanical counter-pressure space suit design using active materials
(Massachusetts Institute of Technology, 2014)Mechanical counter-pressure (MCP) space suits have the potential to greatly improve the mobility of astronauts as they conduct planetary exploration activities; however, the underlying technologies required to provide ... -
Mechanics of fatigue damage in titanium-graphite hybrid laminates
(Massachusetts Institute of Technology, 2001)Titanium-graphite hybrid laminates are being developed for high-temperature aerospace applications. Experimental observations have indicated that cracks in the titanium facesheets initiate at free edges as well as in areas ... -
Mechanisms of damage tolerance and arrest in pressurized composite cylinders
(Massachusetts Institute of Technology, 1996) -
MEMS turbomachinery rotordynamics : modeling, design and testing
(Massachusetts Institute of Technology, 2006)One of the major challenges encountered for the successful operation of high-power-density micro-devices lies in the stable operation of the bearings supporting the high-speed rotating machinery. This thesis presents the ... -
Methods and tools for the formulation, evaluation and optimization of rover mission concepts
(Massachusetts Institute of Technology, 2007)Traditionally, Mars rover missions have been conceived with a single point design approach, exploring a limited architectural trade space. The design of future missions must resolve a conflict between increasingly ambitious ... -
A microfabricated ElectroQuasiStatic induction turbine-generator
(Massachusetts Institute of Technology, 2005)An ElectroQuasiStatic (EQS) induction machine has been fabricated and has generated net electric power. A maximum power output of 192 [mu]W at 235 krpm has been measured under driven excitation of the six phases. Self ... -
Microphysical modeling of ultrane hydrocarbon-containing aerosols in aircraft emissions
(Massachusetts Institute of Technology, 2011)Combustion engines emit precursors of ne particulate matter (PM) into the atmosphere. Numerous gaseous species, soot particles, and liquid aerosols in the aircraft exhaust are involved in PM formation, and these very ne, ... -
Minimum impulse three-body trajectories.
(Massachusetts Institute of Technology, 1973) -
Mission design for safe traverse of planetary hoppers
(Massachusetts Institute of Technology, 2013)Planetary hoppers are a new class of vehicle being developed that will provide planetary surface mobility by reusing the landing platform and its actuators to propulsively ascend, translate, and descend to new landing ... -
The mission for a manned expedition to Mars
(Massachusetts Institute of Technology, 1963)
