Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Light control."”.
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Photonic Metasurfaces for Spatiotemporal and Ultrafast Light Control
… of nano-antennas - has enabled a new paradigm of light control through wave-front engineering. Space-gradient metasurfaces induce spatially varying phase and/or polarization to propagating light. As a consequence, photons propagating through space-gradient metasurfaces can be engineered to undergo …
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A differential balancer set for search light control on a battleship
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Naval Architecture and Marine Engineering, 1907.
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An energy saving smart pedestrian lighting system with IoT
… in many countries is consumed towards lighting up the streets. Most of the basic street lighting systems are switched ON/OFF at regular intervals of time. In this thesis, a system is proposed to develop an energy saving pedestrian light control system to reduce energy consumption. This …
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Dynamic Environmental Control of a Vertical Farm for Lettuce Production
Dynamic environmental control systems in vertical farms have been posed as avenues towards improving agricultural productivity and crop quality while addressing sustainability concerns around energy consumed by lighting systems as well as overall resource use. Previous efforts in dynamic controls …
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Advanced fibre-based endoscopy for biophotonics applications
Despite the tremendous advances witnessed in light microscopy over the past two decades, non-invasive optical imaging is still limited to penetration depths smaller than 1 mm into tissue. Multiple scattering caused by the refractive index inhomogeneities of biological matter rapidly distort any …
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Light Effects on Soy Oil and Soymilk Influence Oxidation, Product Quality, and Packaging Decisions
… of this research was to evaluate the effects of light on soymilk, including the oil component. Soybean oil with added chlorophyll a (0, 1, and 2μg/ml), a photosensitizer, was exposed to light (no light [control], broad-spectrum light) and narrow-band wavelengths (430nm, 450nm, and 660nm] for 4h. …
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Polymer based microscale and nanoscale technologies for optical and biomedical application
… of insects. I integrated lens, conic spacer and light guide to concentrate and redirect sunlight into small area where PV cell can be installed. My design can have total concentration up to ~40 for acceptance angle of 15à °.</p> <p>Second, I designed and fabricated automated light control switch …
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Sub-femtosecond optical timing distribution for next-generation light sources
… is critical for realizing a new regime of light control in next-generation X-ray free-electron lasers. These facilities aim to generate sub-femtosecond (fs) X-ray pulses with unprecedented brightness to realize the long-standing scientific dream to capture chemical and physical reactions …
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Crowdsourcing traffic data for travel time estimation
… helps real-time traffic management and traffic light control. Accurate estimation of travel time requires collecting a lot of real-time data from road networks. This data can be collected using a wide variety of sources like inductive loop detectors, video cameras, radio frequency identification …
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Leaf Volatile Emissions Structure Tree Community Assembly and Mediate Climate Feedbacks in Tropical Forests
… utilizes custom leaf cuvettes, precision light control, and an optimized commercial photoionization detector to achieve real-time detection of leaf emissions with detection limits better than 0.5 nmol m⁻² leaf s⁻¹. The third study utilizes PORCO to test hypotheses about the structuring of …
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Safe and Efficient Intelligent Intersection Control of Autonomous Vehicles
… within the intersection area, the vehicles are controlled by DICA. When there are emergency vehicles entering communication range, we prioritize emergency vehicles through the optimal ordering of vehicles. Since the number of possible vehicle-passing sequences increases rapidly with the number …
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Reglerentwurf zur dezentralen Online-Steuerung von Lichtsignalanlagen in Straßennetzwerken
Die Dissertationsschrift widmet sich einer systemtheoretischen Untersuchung zur verkehrsabhängigen Steuerung von Lichtsignalanlagen in Straßennetzwerken. Aus einem mathematischen Modell für den Verkehrsablauf auf Knotenzufahrten wird ein Verfahren abgeleitet, mit dem sich Umschaltzeitpunkte und …
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Light-induced modulation of DNA recognition by the Rad4/XPC damage sensor protein.
… chemical strategies have been developed to use light to trigger changes in oligonucleotide structures (and thus their activities). This study utilizes photoconvertible nucleic acid to trigger the biological assembly/disassembly of DNA damage repair proteins on DNA. Specifically, this work …