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 20 of 25 for “"light sensor"”.
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An old cofactor in a new light : how nature handles and repurposes adenosylcobalamin
… by the discovery that AdoCbl can serve as a light sensor in light-dependent gene regulation. The use of AdoCbl in living systems, however, comes at a significant price because the cofactor is reactive, prone to side reactions, and very rare. Thus, the acquisition and handling of AdoCbl …
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Intrusion Detection In Wireless Sensor Networks
There are several applications that use sensor motes and researchers continue to explore additional applications. For this particular application of detecting the movement of humans through the sensor field, a set of Berkley mica2 motes on TinyOS operating system is used. Different sensors such as …
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Tikslinis fotovoltinių silicio prietaisų savybių keitimas, panaudojant gilų paviršiaus tekstūrinimą ir dvimatės medžiagos dangas /
… This allowed for a predictable variation of the light reflection from the semiconductor surface. The thesis also presented a method for forming large-area black silicon using two-step metal-assisted chemical etching. The dependencies of the light reflectance on technological parameters such as …
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Influence of protein and solvent environments on quantum chemical properties of photosynthesis enzymes and photoreceptors
… effect, the spectral characteristics of the blue-light sensor BLUF and the light harvesting complex II. The work focuses on the influence of the environment on the corresponding systems. For RuBisCO, it was found that the isotopic effect is almost unaffected by the environment. In case of the BLUF …
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Packaging and interconnection of a black-lit CCD sensor device
… large area, backlit charge-coupled device (CCD) sensor to a metallized substrate, using a materials system compatible with a high vacuum tube configuration. The CCD sensor is used in light sensor and digital camera devices. Currently, CCD devices are mechanically bonded to substrates using a …
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BiDi screen : depth and lighting aware interaction and display
… by emerging LCDs that use embedded optical sensors to detect multiple points of direct contact. The key contribution of this thesis is to exploit the spatial light modulation capability of LCDs to allow dynamic mask-based scene capture without interfering with display functionality. A …
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Proximity Sensors for a High-Bandwidth, Low-Latency Robotic Manipulation Object Avoidance Controller
… in robotic manipulation by utilizing proximity sensors in a high-bandwidth, low-latency object avoidance reflex controller on the Biomimetic Robotics Lab’s dexterous robotic manipulation platform. The research focuses on the two most viable proximity sensors for robotic manipulation: the …
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Shell Game: Randomized representative based election to defend against 51% attacks in Crowd sensing frameworks
… services made possible by an array of high-grade sensors like ambient light sensor, proximity sensor, barometer and gyroscope to name a few. This unique coupling between sensor technology and human interaction has a potential to offer a multitude of opportunities and applications in mobile crowd …
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Adaptive thermal comfort computation with Zigbee wireless sensor networks
… boards, and low cost and low power sensors have made wireless sensor networks easy accessible and usable. Zigbee (802.15.4) operated wireless sensor networks have been commonly used in home automation, building automation, personal health care and fitness, consumer electronics, …
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Using low cost components to determine chlorophyll concentration by measuring fluorescence intensity
… it as an algae and phytoplankton concentration sensor. As it forms the core of this fluorometer's functionality, chlorophyll's fluorescence characteristics and origins are discussed. Special attention is given to the variability of chlorophyll fluorescence as it has a big influence on …
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Towards low-cost context awareness on smart shelving using passive UHF RFID infrastructure
… the integration of battery-free environmental sensors is accomplished by incorporating an RFID tag equipped with resistance measurement capability and a photoresistor. By measuring the resistance of the photoresistor, the designed light sensor could provide additional information (besides the …
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Plant-Like Cryptochrome Does Not Promote Blue Light-Induced Resetting of the Circadian Clock in <i>Chlamydomonas Reinhardtii</i>
… upon environmental time cues such as the daily light/dark and temperature cycles. The unicellular green alga <em>Chlamydomonas reinhardtii</em> is a useful model organism for circadian clock research. It shows several well-characterized circadian rhythms of behavior, and the monitoring of its …
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Seeing Beyond Limits with Physics-Informed Priors
… by dimensionality and visibility: standard sensors capture only two-dimensional data, while light diffuses or scatters across surfaces and through complex media. This dissertation reformulates imaging as an interplay of optical encoding and neural decoding. It models forward physical …
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The development and optimisation of a low cost optical chemical sensing platform
With recent improvements in wireless sensor network hardware it is logical there should be a concurrent push to develop the sensors that are compatible in terms of price and performance. Wireless sensor networks are made up of a multitude of low power sensing nodes and are typically deployed in a …
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Performance evaluation of different data aggregation algorithms for different types of sensors in WSN based cluster
In wireless sensor networks, data aggregation algorithms are used to extend the network lifetime Size of data transmission from the cluster head node to base station show a critical role in CH nodes energy consumption. In this project three different data aggregation algorithms coding schemes based …
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Multi-functional, self-sensing and automated real-time non-contact liquid dispensing system
… in real time. The dual purpose fiber optics sensor/plunger is able to detect the status of liquid morphology under dispensing, in real time, by the internal light sensor and control both the amount and the manner of liquid dispensing by its plunger-like movements. This dissertation work has …
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Methods for monitoring the human circadian rhythm in free-living
… is influenced primarily through exposure to light. A direct pathway from the eyes to the suprachiasmatic nucleus, where the circadian clock resides, is used to synchronise the circadian clock to external light-dark cycles. In modern society, with the ability to work anywhere at anytime and a …
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Analog and Digital Circuits in a Complementary Organic TFT Technology on Flexible Substrate
… the same substrate of different kinds of organic sensors (i.e., light, temperature, pressure, humidity, pH, biosensors, etc.) in order to implement fully-integrated flexible organic smart sensors. Despite these interesting developments, most OTFT processes still feature only p-type transistors, …
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Tasting light through hydrogen peroxide : molecular mechanisms and neural circuits
… remains unresolved. In the process of using light in learning experiments, I noticed that worms stop feeding immediately after being exposed to short wavelength (UV) light. Curious about whether worms might actually have a subjective experience in response to light akin to primitive vision, I …
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