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.
Results
Showing 1 to 20 of 21 for “"cost and efficiency"”.
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Municipal Wastewater Disinfection with Electromagnetic Waves using Escherichia coli Concentration as Measurement of Quantification
… is essential to protecting the environment and human welfare. Although chlorination is widely used, the environmental and health concerns associated with chlorine are growing. Treatment facilities are implementing alternative technologies, though the cost and efficiency associated with these …
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Non-rare-earth permanent magnet synchronous reluctance machine for compressor application
… is consumed in HVAC systems of residential and commercial sectors. It is crucial to use an efficient motor in an HVAC system as the majority of the power is consumed by the compressor motor. Although the permanent magnet synchronous motor has been a viable solution with high efficiency, the …
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ON THE METABOLIC AND MECHANICAL DEMANDS OF WALKING: THE EFFECTS OF SLIDING FRICTION, LIMB SWING WORK, AND BOUT DURATION.
Researchers have long investigated the metabolic and mechanical demands of locomotion. Discoveries in such field not only have advanced our understanding of the physiology of movement and energy transformations, but have also impacted anthropology, zoology, sports science, and clinical medicine. …
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An analysis of distributed solar fuel systems
… on the feasibility of large centralized systems and applications. Not much research exists on the feasibility of distributed solar fuel systems. This thesis is an attempt to understand the larger context of solar fuel systems, to examine the case for going distributed and to critically analyze a …
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Green Organic Solar Cells from a Water Soluble Polymer and Nancrystalline TiO2
The cost of the present generation of inorganic silicon solar cells is very high and further breakthroughs in cost and efficiency using traditional materials are becoming less and less likely after over 50 years of development. Next generation organic solar cells offer a solution to the limitations …
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Explicating excessive financial resource allocation by building control in achieving regulatory conformity in domestic extensions
… extensions in contrast to volume house building and commercial projects manifests a propensity to consume more economic resources than that generated from fee income. In personal Building Control practice cost and efficiency savings were achieved through linear programming, economies of scale and …
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A Pseudo-Binary Cascaded H-bridge Converter for Solid-State Transformer Applications and Modulation Techniques for the Minimization of the Common-Mode Voltage
… is to be highly efficient, compact, reliable, and cost-effective. Conventionally, power converters supply or consume power from the low-voltage utility, which impacts the size and efficiency of the system. For example, the recent proliferation of electric vehicles has demanded the rapid …
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Bi-Directional AC-DC Converters for Electric Vehicles
… efforts have been devoted to improve EVs and EV infrastructure. EV battery and thus the on-board EV battery charger are among the most important parts of an EV. There are specific requirements for EV chargers in terms of weight, safety, reliability, cost and efficiency. Meeting power …
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Numerical Simulations of Flow and Mass Transport in Micro-Fluidic Components for Modular Bio-Analytic Chip Applications
… chips to miniaturize integrate chemical and biological systems (µTAS) can be greatly productive in terms of cost and efficiency. During the design of these modular devices, misalignment of materials, geometrical or both is one of the most common problems. These misalignments can have …
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An examination of the role of the concept of the community within the current reorganisation of English local government
The thesis will examine the role and impact of the concept of the community within the structural reorganisation of English local government between 1992 and 1995. The methodological approach adopted within this thesis has been to compare the use, application and significance of the community with …
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Activity and Stability Design Principles of Transition Metal Compounds for Decarbonization
… (e.g., rechargeable batteries, fuel cells, and water splitting devices) enabled by low-cost, earth-abundant materials. One of the most promising sustainable technologies is transforming earth-abundant molecules and compounds into value-added fuels, chemicals, and materials with electricity …
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Flexible manufacturing equipment design based on a mass customization strategy
… to meet the needs of individual customers in a cost effective manner. The days of mass producing standardized products for homogeneous markets for long periods of time are quickly fading from memory. Instead, a large variety of products must be produced at the same efficiencies formerly …
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Strategies for oil and gas companies to remain competitive in the coming decades of energy challenges
… innovation challenges, increased regulation and new energy policies. These challenges pose a threat to the basic industry structure. Oil & gas companies espouse four common industry-wide strategies of Portfolio Management, Operational Efficiency, Financial Management and Sustainability-of …
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Supporting the UK distribution networks with power electronic end user voltage regulation
As time passes new technologies demanding and generating power will be increasingly connected to distribution networks. Studies found that the capacity of the network cannot support the predicted increase in demand due to current limits on the network. To increase the capacity of the network, …
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Sub-module differential power processing for photovoltaic applications
… has long been hindered by the prohibitive cost and low energy output. Advanced power electronics design plays a critical role in reducing the cost of PV energy systems and improving the power output. Conventional distributed power electronics solutions in a PV system such as DC optimizer …
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The Changing Role of Public-Private Partnerships in Urban Transportation: A Case Study of the Rise of P3s in Denver, CO
<p>This research examines the expanding role of public-private partnerships (PPPs or P3s) in Denver metro transportation projects in three areas: (1) innovative funding and financing of transit infrastructure projects, (2) the partnerships between freight and passenger rail services, and (3) …
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Representation of thermal energy in the design process
… don't just look up square footage requirements and then draw a rectangle that satisfies the givens. There must be an interpretation. The requirements will be met. but there will be many other layers added. What is needed is a positive statement of thermal conditions that will support the …
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Preferences for Alternative Educational Programming in Rural Iowa K-12 Public School Districts
… Legislature defeated a bill which would have mandated school district reorganization in Iowa's K-12 public schools with enrollments under three hundred students. These districts would have been required to reorganize with other districts creating a new district of at least six hundred students. …
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Programming Abstractions for Scalable and High-Performance Memory Disaggregation
… such as in-memory analytics, databases, and caching, are driving the memory demand in datacenters. Unfortunately, DRAM scaling is challenging as the technology reaches its physical limit. Although its demand continues to rise, memory is an underutilized resource within datacenters while …
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