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 126 for “"The Collector"”.
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Curating the collector: exploring representations of early modern German women book collectors (1650-1780)
… of book collecting by German women in the early modern period in order to explore the role of gender in this activity. Portrayals of book collectors in the modern and early modern eras offer examples of how this identity is constructed, particularly in the underlying assumptions and …
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Computer simulation and optimisation of solar heating systems for Cyprus
This thesis reports the results of research into the modelling and simulation of solar water and space heating for Cyprus, and the investigation of the factors concerning the optimisation of such systems. Further a number of design criteria, which can be used by consultants and designers of solar …
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A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector
… line test investigating flow within a diffuser-collector. Facility controls allowed the quarter scale model to match both Reynolds number and Mach number. Mass averaged conditions at the diffuser inlet during testing were determined as 1.939 ? 106 for Reynolds number based upon diffuser inlet …
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Three dimensional modelling and optimisation of multistage collectors
Multistage collectors are commonly used in travelling wave tubes (TWTs), klystrons, gyrotrons and inductive output tubes (IOTs). A dc beam transfers some of its energy to the input RF wave during its travel through the interaction circuit. The purpose of a collector is to recover most of the …
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Review of solar thermoelectric energy conversion and analysis of a two cover flat-plate solar collector
The process of solar thermoelectric energy conversion was explored through a review of thermoelectric energy generation and solar collectors. Existing forms of flat plate collectors and solar concentrators were surveyed. A thermal analysis of a common two-cover flat plate solar collector was then …
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DC and AC modeling of heterostructure bipolar transistors (HBTS)
… bipolar transistor, a complete model for the dc and ac performances of the device is developed based on the Ebers-Moll methodology. The formulation is modified to include the abrupt single HBT, by introducing the effects of the conduction band discontinuity at the base-emitter junction as …
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Advanced methods for droplet capture in water recovery systems and agricultural sprays
Water scarcity is one of the important challenges of our century. In this thesis, we investigate advanced methods to mitigate it in two ways: water recovery from fog and reducing chemicals runoff in agriculture. In the first part, we review current fog collector design and identify droplet …
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Simulation, testing and design of a fully adhesive bonded flat plate solar collector for highly automated production
This thesis presents simulation results and experimental data for a collector type with an all-round supported absorber and a fully adhesive edge bond that is produced on a highly automated production line. A literature review discussing measures to reduce the convective heat loss in flat plate …
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Numerical Analysis of Airflow and Output of Solar Chimney Power Plants
… techniques and expected energy output from the system. The solar chimney consists of three primary parts: a collector made of a transparent material such as glass, a tower made of concrete located at the center of the collector, and a turbine that is typically placed at the bottom of the …
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Sealing of partially evacuated solar solar collectors
The object of this work is to look into the long term viability of a partially evacuated, high performance, hot water, solar collector proposed by Roberts (1979). The collector involves an absorber plate inside an evacuated domed glass tube, sealed by a polymer seal onto a metal endcap. The …
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The application of solar desalination for water purification in Cyprus
This thesis initially reports on the water resources of Cyprus. From this analysis the need for desalination systems to provide fresh water, is established.<br/><br/>A survey of solar desalination systems shows that there arc two broad categories of such systems; namely direct and indirect …
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Debris Characterization And Mitigation Of Droplet Laser Plasma Sources For Euv Lithography
… devices with feature sizes smaller than 32 nm. The optics to be used in the EUVL steppers is reflective optics with multilayer mirror coatings on each surface. The wavelength of choice is 13.5 nm determined by the optimum reflectivity of the mirror coatings. The light source required for this …
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Development of a volumetric solar thermal absorber
Thermal collectors are the central part of a solar energy system. Within the collector, the absorber is the most essential component and contributes about 46% to the total costs of a collector. These absorbers are typically based on the sheet-pipe design. Hence, further improvements of the absorber …
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Surface cleaning of optics by plasma (scope) with atomic hydrogen
A major obstacle in the implementation of extreme ultraviolet (EUV) light photolithography in production tools is the accumulation of fuel debris on the collector optics near the pinch region. Specifically, removal of deposited tin from the source onto the collector optics is needed to improve the …
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Removal of tin from exterme ultraviolet collector optics by an in-situ hydrogen plasma
Throughout the 1980s and 1990s, as the semiconductor industry upheld Moore’s Law and continuously shrank device feature sizes, the wavelength of the lithography source remained at or below the resolution limit of the minimum feature size. Since 2001, however, the light source has been the 193nm ArF …
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Separation of Colloidal Particles in a Packed Column using Depletion Forces
… of a binary dispersion of PS particles into the inlet of a packed bed of 0.5 mm silica collector beads. Prior to injection, a carrier fluid of either KCl and KOH electrolyte or a silica nanoparticle dispersion was flowing through the column at steady state. When the carrier fluid was a …
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Análise da atividade e gasto fisiológico dos catadores de resíduos sólidos: a percepção da terapia ocupacional
The world’s transformation in the market has been causing changes in the working class. As those changes have come, the market calls for a high capacity from the workers. Due to that, the unemployment rate has increased and induced a new type of class worker: the Recyclable Material Collectors. In …
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Availability of solar energy at Baghdad, Iraq and its application to absorption refrigeration for cold stores purposes
The purpose of this investigation is to study the availability of solar energy at Baghdad, Iraq for utilisation to produce refrigeration at 10\,1 temperatures where it will be applicable for cold stores and freezer rooms and to prepare design data for such applications. Five years meteorological …
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