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Now showing items 21-30 of 56
A mechanistic investigation of nonlinear interfacial instabilities leading to slug formation in multiphase flows
(Massachusetts Institute of Technology, 2015)
Many industrial applications involve the transport of multiphase flows through pipes. For instance, the design and operation of oil pipelines and production facilities relies heavily on understanding the hydrodynamics of ...
Design and control methods for high-accuracy variable reluctance actuators
(Massachusetts Institute of Technology, 2015)
This thesis presents the design and control techniques of a variable reluctance actuator for driving a reticle motion stage in photolithography scanners. The primary thesis contributions include the design and experimental ...
Single-molecule studies of protein degradation and kinesin-8 motility
(Massachusetts Institute of Technology, 2015)
Molecular machines drive living organisms out of equilibrium and perform critical functions in almost every aspect of cellular processes. They are mechanical enzymes transducing free energy stored in chemical forms to ...
Design and prototype of dual loop lubricant system to improve engine fuel economy, emissions, and oil drain interval
(Massachusetts Institute of Technology, 2015)
Regulations aimed at improving fuel economy and reducing harmful emissions from internal combustion engines place constraints on lubricant formulations necessary for controlling wear and reducing friction. Viscosity reduction ...
Ion transport across individual sub-continuum graphene nanopores : phenomenology, theory, and implications for industrial separations
(Massachusetts Institute of Technology, 2015)
Atomically thin materials, and in particular graphene, provide a new class of solid-state nanopores - apertures that allow for the exchange of matter across thin membranes - with the smallest possible volumes of any ion ...
Experimental investigations of oxygen-separating ion transport membranes for clean fuel synthesis
(Massachusetts Institute of Technology, 2015)
Ion transport membranes (ITMs) are dense ceramic membranes which have the potential for 100% selective separation of oxygen from air. ITMs operate at extreme temperatures (>800°C), necessary for the mobility of lattice ...
Nanoporous monolayer graphene membranes for water purification : from concept to realization
(Massachusetts Institute of Technology, 2015)
Graphene, a single sheet of carbon atoms, may provide the foundation for a new class of highly permeable membranes for water purification and desalination. Though atomically thin, graphene exhibits both exceptional mechanical ...
MIT Skywalker : a novel robot for gait rehabilitation of stroke and cerebral palsy patients
(Massachusetts Institute of Technology, 2015)
Every two minutes, 3 people in the United States will have a stroke and every hour an American baby is born with cerebral palsy. The only method available to recover from motor impairments associated with these brain ...
Turbulent flame microstructure, dynamics, and thermoacoustic instability in swirl-stabilized premixed combustion : measurements, statistics, and analysis
(Massachusetts Institute of Technology, 2015)
One of the most difficult challenges facing the development of modern gas turbines-for power generation, and propulsion-is the mitigation of dynamic instabilities in the presence of efficiency and emissions constraints. ...
The impact of pathological ventilation on aerosol deposition : imaging, insight and intervention
(Massachusetts Institute of Technology, 2015)
Aerosol therapies are often used to treat lung diseases in which ventilation is distributed heterogeneously throughout the lung. As therapeutic aerosols are transported by the inhaled air, it is likely that deposition is ...