Browsing Graduate Theses by Title
Now showing items 19137-19156 of 34665
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Lower Roxbury redevelopment
(Massachusetts Institute of Technology, 1956) -
Lowering the cost of solar-powered drip irrigation systems for smallholder farmers through systems-level modeling, optimization, and field testing
(Massachusetts Institute of Technology, 2019)The objective of this research is to lower the cost of solar-powered drip irrigation systems and thus make them more accessible to smallholder farmers, who operate farms that are less than 2 ha and normally located in rural ... -
LP-based subgradient algorithm for joint pricing and inventory control problems
(Massachusetts Institute of Technology, 2008)It is important for companies to manage their revenues and -reduce their costs efficiently. These goals can be achieved through effective pricing and inventory control strategies. This thesis studies a joint multi-period ... -
LP/SDP hierarchy lower bounds for decoding random LDPC codes
(Massachusetts Institute of Technology, 2015)Random (dv, dc)-regular LDPC codes (where each variable is involved in d, parity checks and each parity check involves d, variables) are well-known to achieve the Shannon capacity of the binary symmetric channel (for ... -
The LQG/LTR method and discrete-time control systems
(Massachusetts Institute of Technology, 1984) -
LTE radio analytics made easy and accessible
(Massachusetts Institute of Technology, 2015)Despite the rapid growth of next-generation cellular networks, researchers and end users today have limited visibility into the performance and problems of these networks. As LTE deployments move towards femto and pico ... -
Lubricant oil consumption effects on diesel exhaust ash emissions using a sulfur dioxide trace technique and thermogravimetry
(Massachusetts Institute of Technology, 2005)A detailed experimental study was conducted targeting lubricant consumption effects on ,diesel exhaust ash levels using a model year 2002 5.9L diesel engine, high and low Sulfur commercial lubricants, and clean diesel ... -
Lubrication in the ball and socket joint of a swash plate mechanism
(Massachusetts Institute of Technology, 2020)The tribology of the ball and socket on the connecting rod in a swash plate engine is studied in the hydrodynamic regime. The engine operates at 1390rpm with an axial load on the rod as high as 1 x 10⁴N. The instantaneous ... -
Lucent SCN : leveraging the fully integrated supply chain
(Massachusetts Institute of Technology, 2004)(cont.) in the success of Lucent's turnaround and, from the patterns that emerge, a basis for a new holistic framework for designing and leveraging an integrated supply chain is offered. This framework suggests that attaining ... -
Ludus ex machina : toward computational play
(Massachusetts Institute of Technology, 2018)The day is not far off when autonomous, artificially intelligent computational subjects will be employed in creative industries such as architecture and design. Artificial intelligence is rapidly becoming ubiquitous, and ... -
LUI : a scalable, multimodal gesture- and voice-interface for large displays
(Massachusetts Institute of Technology, 2019)With the rise of augmented and virtual reality, new interactive technologies are incorporating immersive user interfaces that leverage gesture and voice recognition in addition to existing controller inputs. However, the ... -
Lumental : web-based tunable lighting control
(Massachusetts Institute of Technology, 2012)Dynamically adjusting the light spectrum of spectrum-tunable light fixtures promises significant energy savings over binary or incremental dimming control. To enable this level of controllability, lighting must evolve from ... -
LuminAR : a compact and kinetic projected augmented reality interface
(Massachusetts Institute of Technology, 2011)For quite some time, researchers and designers in the field of human computer interaction have strived to better integrate information interfaces into our physical environment. They envisioned a future where computing and ... -
Luminescent, quantum dot-based anti-reflective coatings for crystalline silicon photovoltaics
(Massachusetts Institute of Technology, 2010)This thesis demonstrates and evaluates the potential application of luminescent quantum dot/polymer solutions on crystalline silicon photovoltaics. After spin coating the QD/polymer onto silicon photodiodes, an increase ... -
Lunar descent using sequential engine shutdown
(Massachusetts Institute of Technology, 2006)The notion of sequential engine shutdown is introduced and its application to lunar descent is motivated. The concept calls for the utilization of multiple fixed thrust engines in place of a single continuously throttleable ... -
Lunar gravitational field estimation and the effects of mismodeling upon lunar satellite orbit prediction
(Massachusetts Institute of Technology, 1993) -
Lunar lander propellant production for a multiple site exploration mission
(Massachusetts Institute of Technology, 2004)A model has been developed to analyze the benefit of utilizing a processing plant architecture so that a lunar oxygen production demonstration mission can also provide a significant exploration and scientific return. This ... -
Lunar landing : dynamic operator interaction with multi-modal automation systems
(Massachusetts Institute of Technology, 2011)The ability of operators to "gracefully transition" (maintaining control and awareness of the system without excessive workload or decrements in flight performance) between levels of automation (LOA) in several case studies ... -
Lunar orbiter state estimation using neural network-based crater detection
(Massachusetts Institute of Technology, 2020)Terrain relative navigation can improve the precision of a spacecraft's state estimate by providing supplementary measurements to correct for drift in the inertial navigation system. This thesis presents a crater detector, ... -
LunarWSN: A Wireless Sensor Network for In-Situ Lunar Water Ice Detection
(Massachusetts Institute of Technology, 2021-09)The future lunar sustainable habitation will be resource-intensive. Taking advantage of local resources on the lunar surface is the most effective way to reduce the cost and risk for future lunar missions. Water is one of ...
