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 10 of 10 for “"Indoor lighting"”.
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Single-stage boost integrated asymmetrical half-bridge AC-DC power converter with dual modulation for indoor led lighting
Light emitting diodes (LEDs) for indoor lighting is a promising technology which can lead to major energy saving and cost reductions. The major concerns of improving power factor and regulating the output current ripple with regards to LED drivers has been addressed in this thesis by using dual …
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Polymers via chemical vapor deposition and their application to organic photovoltaics
… power common electronic displays in ambient indoor lighting and can be tortuously flexed and folded without loss of function. Further, optically inverting the device structure (by positioning the oCVD PEDOT electrode on top of the device and illuminating from above) improves performance with …
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Folding fan fac̦ade : designing an actuated adaptive fac̦ade system for fine-grain daylight control
… control, which can result in suboptimal indoor lighting levels when the blinds or shades are down. While static window treatments are practical low-cost options, they cannot offer the level of adjustment that dynamic shadings can provide. Majority of the time, occupants of a room have the …
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Integrating Natural Light for Wellbeing, Performance, and Quality Care Delivery in Healthcare Environments
… This research aims to bridge this gap by highlighting the influence of the lighting conditions on personnel well-being, and their subjective performance within healthcare environments. Conducted over a six-month period within a healthcare facility in Abuja, Nigeria, this study employs a mixed …
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Investigation of physical and electro-optic diffractive structures for energy-efficient smart window applications
The cost of energy used for lighting, heating, and cooling in commercial and residential buildings is increasing annually while wasteful losses and gains through inefficient windows can be avoidable with advanced technology. Energy-efficient smart windows in commercial and residential buildings can …
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Multi-Channel Constant Current (MC3) LED Driver for Indoor LED Luminaries
Recently, as a promising lighting source, light-emitting diodes (LEDs) have become more and more attractive and have great opportunity to replace traditional lighting sources - incandescent, fluorescent and HID because of the advantages such as high luminous efficacy, long lifetime, quick on/off …
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Two-Stage Multi-Channel LED Driver with CLL Resonant Converter
LED is widely used in many applications, such as indoor lighting, backlighting and street lighting, etc. For these application, multiple LED strings structure is adopted for reasons of cost-effectiveness, reliability and safety concerns. Several methods and topologies have been proposed to drive …
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Aportaciones al modelado de lámparas fluorescentes para aplicaciones en alta frecuencia con regulación de flujo luminoso
… the strong market penetration of LED based lighting systems, fluorescent fixtures still capitalize most of the existing indoor lighting installations nowadays. The current trend shows an increasing need of more efficient, flexible and controllable ballasts. In the near future, high …
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Lighting Control Systems for Energy Saving and User Acceptance: State-of-the-art and future directions
Lighting accounts for one-fifth of global electricity use. In Sweden, energy demand for lighting corresponds to 20% of the total electricity use in office buildings. Lighting retrofit measures are considered to be among the most cost-efficient way to reduce energy use in buildings. In particular, …
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Optimizing the sustainability of single-family housing units
The sustainability of housing units can be improved by optimizing their social, environmental, and economic performances. The integration of green building equipment and systems such as geothermal heat pumps and water-efficient faucets often improves the social and environmental performances of …