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 21000 for “"efficiency"”.
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Impeding efficiency
Impeding Efficiency is based on my interest in the manner in which we experience space and in particular, the moment we become conscious of our surrounding built environment. The point of change between spaces, the threshold. Contemporary society lives in fast-forward; everything we do has been …
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Energy Efficiency Radiator
Komið hafa fram óskir frá viðskiptavinum Marorku um upplýsingaskjá sem gæti varpað upp upplýsingum úr Marorka Online kerfinu á stóran skjá. Æskilegt væri að á upplýsingaskjánum væri hægt að sjá helstu lykiltölur fyrir hvert skip og samtölur fyrir flotann. Felst því verkefnið í því að hanna og smíða …
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Solar Cell Temperature Dependent Efficiency and Very High Temperature Efficiency Limits
… The results of this analysis show that the efficiency of a direct bandgap material with an optimal bandgap could reach 19 % at 400 °C and 2000x suns, if the SHR recombination is reduced to an acceptable level. An analytical solar cell model was also used in a quasi-3D numerical model to …
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Analysis of Spectrum Efficiency and Energy Efficiency of Heterogeneous Cellular Networks
… HetNets are capable of increasing the spectrum efficiency (SE) through higher reuse of the available spectrum, the operation of the BSs comes at a huge increase in the overall network power expenditure, leading to the deterioration of the energy efficiency (EE) performance. For sustainable …
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Efficiency droop mitigation and quantum efficiency enhancement for nitride Light-Emitting Diodes
… state-of-the art InGaN-based LEDs, including ‘efficiency droop’ issues that cause output power quenching at high current injection levels (> 100 A/cm2). In this dissertation, approaches were investigated to address the major issues related to state-of-the-art nitride LEDs, in particular related …
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Equitable economic energy efficiency : creating good jobs in low-income efficiency programming
Energy efficiency is an important consideration in energy policy-making. So, a federal program aimed at funding "energy efficiency retrofits" for low-income households could be an important step in increasing the overall efficiency of energy use in America. If each eligible household reduces the …
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Network Growth and Efficiency
… system is how network growth affects efficiency. Knowledge of efficient edges can guide how countries interact within a given network by maintaining only the most efficient relations. Two growth models were compared to determine their effects on efficiency. The hub model is the more …
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Material efficiency in construction
… to reach the recommended limit. Process efficiency improvements cannot deliver this magnitude of reduction; however if steel is used more efficiently so that less new material is required to deliver the same service - a concept termed 'material efficiency' - then this could allow demand …
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Shariah: An efficiency analysis
The oil shock of 1973 brought newfound wealth to a group of ultraconservative Muslims. This wealth coincided with the growing demand for shariah compliant products. The prohibition against interest is not new but has been around for millennia. This dissertation attempted to ascertain if Shariah …
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High efficiency thermophotovoltaic microgenerators
We proposed, designed, and demonstrated a first-of-a-kind millimeter-scale thermophotovoltaic (TPV) system using a metallic microburner, photonic crystal (PhC) emitter, and low bandgap TPV cells. Many technologies (fuel cells, Stirling, thermoelectric, etc.) that potentially enable a portable …
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Efficiency-Driven Enterprise Design
This dissertation explores the use of the efficiency performance measurement paradigm (EM), in terms of its concepts and applications, as an ex-ante mechanism to evaluate enterprise performance and inform enterprise design. The design of an enterprise is driven by decisions that include, but not …
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Optimising energy efficiency and spectral efficiency in multi-tier heterogeneous networks : performance and tradeoffs
… of future generation networks. The spectral efficiency (SE) can be improved by better utilisation of the network resources at the cost of reduction in the energy efficiency (EE) due to the enormous increase in the network power expenditure arising from the densification of the network. One of …
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Development of an automated efficiency and loss measurement system for high-efficiency power converters
… thesis addresses the development of an automated efficiency and loss measurement system for high-efficiency power converters. The design, construction, calibration, and evaluation of such a measurement setup is described, including development of software to control the system. Application of the …
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Professional Education and Reference Efficiency
Made available in DSpace on 2014-12-08T22:49:24Z (GMT). No. of bitstreams: 1 6808037.pdf: 7733527 bytes, checksum: c15087040ec438ff1c70d215afaf9fb8 (MD5) Previous issue date: 1967
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