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Unified framework to design efficient membrane distillation for brine concentration
(Massachusetts Institute of Technology, 2017)
Increasing regulations requiring industrial zero-liquid discharge necessitate the development of efficient desalination technologies for treating high salinity brine. Membrane distillation (MD) is promising for such ...
Development and translation of label-free functional microscopy based on optical coherence tomography
(Massachusetts Institute of Technology, 2017)
Optical coherence tomography (OCT), an imaging modality based on low coherence interferometry, can be extended to obtain various endogenous functional contrasts. This thesis focuses on the development and translation of ...
Desalination of water by vapor transport through hydrophobic nanopores
(Massachusetts Institute of Technology, 2014)
Although Reverse osmosis (RO) is the state-of-the-art desalination technology, it still suffers from persistent drawbacks including low permeate flux, low selectivity for non-ionic species, and lack of resistance to chlorine. ...
Harmonic poly-actuator : design and control of a new piezoelectric mechanism
(Massachusetts Institute of Technology, 2015)
Piezoelectric devices, e.g. piezoelectric stack actuators, have several salient features inherent to their structure. They are efficient, have a high bandwidth, and their capacitive loading allows for static loads to be ...
Electromechanical systems to enhance the usability and diagnostic capabilities of ultrasound imaging
(Massachusetts Institute of Technology, 2014)
Ultrasound is used extensively in medicine to non-invasively examine soft tissues. Compared to computed-tomography (CT) scanning or X-ray imaging, ultrasound is lower-cost, more portable, real time, and subjects neither ...
The effect of towed array orientation on the 3D acoustic picture for sound sources and the vertical ambient noise profile
(Massachusetts Institute of Technology, 2015)
The three dimensional (3D) acoustic arrival structure of the undersea ambient noise field is important for many reasons, and can give us significant insights into the Arctic environment. For example, the anthropomorphic ...
Design and manufacturing of all-dielectric optical metamaterial with gradient index of refraction
(Massachusetts Institute of Technology, 2015)
Gradient index (GRIN) materials offer the most general manipulation over wave fields of light compared to conventional refractive optics, where the light is deflected by the curved surface. The creative way to implementing ...
Evaporation from nanoporous membranes for high heat flux thermal management
(Massachusetts Institute of Technology, 2016)
Heat dissipation is a critical limitation in a range of electronic devices including microprocessors, solar cells, laser diodes and power amplifiers. The most demanding devices require dissipation of heat fluxes in excess ...
Advances in membrane-based oil/water separation
(Massachusetts Institute of Technology, 2017)
Oil is a widespread pollutant from oil spills to industrial oily wastewater in the oil and gas, metalworking, textile and paper, food processing, cosmetics, and pharmaceutical industries. A wastewater of particular concern ...
Evaporation from nanopores : probing interfacial transport
(Massachusetts Institute of Technology, 2018)
Evaporation, a commonly found phenomenon in nature, is widely used in thermal management, water purification, and steam generation as it takes advantage of the enthalpy of vaporization. Despite being extensively studied ...