Browsing MIT Theses by Title
Now showing items 38621-38640 of 57335
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Optoelectronic implementations of Pulse-Coupled Neural Networks : challenges and limitations
(Massachusetts Institute of Technology, 2007)This thesis examines Pulse Coupled Neural Networks (PCNNs) and their applications, and the feasibility of a compact, rugged, cost-efficient optoelectronic implementation. Simulation results are presented. Proposed optical ... -
Optoelectronic integration using the magnetically assisted statistical assembly technique : initial magnetic characterization and process development
(Massachusetts Institute of Technology, 2002)The commercial integration of optoelectronic devices heavily relies on hybrid techniques such as wire bonding and flip-chip bonding. These methods are limited in the scale and flexibility in integration. Research focused ... -
Optoelectronics of graphene-based Van der Waals heterostructures
(Massachusetts Institute of Technology, 2016)Research on van der Waals (vdW) materials (homo- or hetero-) is a rapidly emerging field in condensed matter physics. They are layered structures with strong chemical bonding within layers and relatively weak van der Waals ... -
An optofluidic platform for longitudinal circulating tumor cell studies in mouse models of cancer
(Massachusetts Institute of Technology, 2020)Metastasis is a complex, multi-step process that is responsible for over 90% of cancer-related deaths. Circulating tumor cells (CTCs) that are shed from primary tumors represent the disseminating "seeds" that give rise to ... -
Optogenetic disruption of memory-drive, oculomotor behavior in the non-human primate
(Massachusetts Institute of Technology, 2014)Pharmacological inactivation studies have shown that the frontal eye field (FEF) is critical for executing saccades to remembered locations. FEF neurons increase their firing rate during the three epochs of the memory-guided ... -
Optomechanical and wavelength alignments of CubeSat laser communication Systems
(Massachusetts Institute of Technology, 2017)While the introduction of CubeSats has enabled the scientific, commercial, and governmental communities to launch space missions more quickly at lower costs, the communication subsystems of the platform are limited by a ... -
Optomechanical design for CubeSat Laser Infrared CrosslinKs
(Massachusetts Institute of Technology, 2019)The CubeSat Laser Infrared CrosslinK (CLICK) mission is a technology demonstrator for a 1.5U intersatellite link laser communications terminal deployed on a pair of 3U CubeSats in Low Earth Orbit (LEO). The narrow transmission ... -
Optomechanical design, analysis, and testing of the nanosatellite optical downlink experiment
(Massachusetts Institute of Technology, 2018)As space payloads are miniaturized, many companies and government agencies are fielding small satellites that can compete with traditional "monolithic" satellites. More than 250 CubeSats were launched into orbit in 2017 ... -
Opus : exploring publication data through visualizations
(Massachusetts Institute of Technology, 2018)Scientific managers need to understand the impact of the research they support since they are required to evaluate researchers and their work for funding and promotional purposes. Yet, most of the online tools available ... -
Or else : cataclysm and containment
(Massachusetts Institute of Technology, 2008)An analysis of the figure-ground relationships of central Minneapolis, Calgary, or Montreal must inevitably include the emergence of and pervasiveness of interior pedestrian walkways - no longer can the street/building ... -
(OR)² : operations research applied to operating room supply chain
(Massachusetts Institute of Technology, 2014)Massachusetts General Hospital (MGH) is ranked as the top hospital in New England and second nation-wide. It is also the largest hospital in New England; it uses an average of 58 operating rooms, where approximately 150 ... -
Oral drug delivery as an alternative to needle-based injection for large molecules : an assessment of the field & evaluation of high-priority technologies
(Massachusetts Institute of Technology, 2018)Oral delivery of large molecules is widely considered the "holy grail" of drug delivery, but attempts to achieve this within the past century have been met with a lack of success, confounded by low bioavailability. Novel ... -
Orbifold genera, product formulas and power operations
(Massachusetts Institute of Technology, 2004)There is a formula by the string theorists Dijkgraaf, Moore, Verlinde and Verlinde, expressing the orbifold elliptic genus of the symmetric powers of an almost complex manifold M in terms of the elliptic genus of M itself. ... -
Orbifold points on Teichmüller curves and Jacobians with complex multiplication
(Massachusetts Institute of Technology, 2011)For each integer D >/= 5 with D =/- 0 or 1 mod 4, the Weierstrass curve WD is an algebraic curve and a finite volume hyperbolic orbifold which admits an algebraic and isometric immersion into the moduli space of genus two ... -
Orbispaces
(Massachusetts Institute of Technology, 2005)In this thesis, I introduce a new definition for orbispaces based a notion of stratified fibration and prove it's equivalence with other existing definitions. I study the notion of orbispace structures on a given stratified ... -
Orbit determination and prediction processes for low altitude satellites
(Massachusetts Institute of Technology, 1980) -
Orbit determination for medium altitude eccentric orbits using GPS measurements
(Massachusetts Institute of Technology, 1999)Recent satellite constellation developers have increasingly considered non-traditional medium altitude circular and elliptical orbits. These projects will track their satellites using the GPS system, which has been used ... -
Orbit determination using modern filters/smoothers and continuous thrust modeling
(Massachusetts Institute of Technology, 2008)The development of electric propulsion technology for spacecraft has led to reduced costs and longer lifespans for certain types of satellites. Because these satellites frequently undergo continuous thrust, predicting their ... -
The orbit of the moon.
(Massachusetts Institute of Technology, 1971) -
Orbital debris : drafting, negotiating, implementing a convention
(Massachusetts Institute of Technology, 2007)It is time to recognize that while space may be infinite, Earth orbital space is a finite natural resource that must be managed properly. The problem we face with space pollution is complex and serious. The space treaties ...
