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 2973 for “"ULTRA"”.
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Ultra-Smooth
The title of this thesis, ultra-smooth, is an invented term -- a neologism defined by the work produced through this study. Through physical prototypes of formwork shaped by gravity for concrete floors and through the observation of gravity’s effect on the generation of such forms through …
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Ultra-wideband digital baseband
The FCC approved the use of Ultra-wideband signals for communication purposes in February 2002 in the band from 3.1GHz to 10.6GHz, effectively opening 7.5GHz of free unlicensed bandwidth. There are two main constraints for the use of this band: a maximum EIRP spectral density of -41.3dBm/MHz and a …
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Design of Ultra-wideband Reflectors
… bandwidth. This thesis investigates how ultra-wideband reflectors can be designed using novel approaches going beyond the conventional approaches listed above. Specifically, we investigate two new methods to design reflectarrays. In the first method, the reflector is designed as a …
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Development of ultra-broadband modulators
… data onto an optical carrier. Modulation with ultra-broadband capability enables the generation of arbitrary waveforms using the electro-optic effect. By separating an incoming pulsed optical source into a frequency comb through the use of arrayed waveguide gratings, and employing both phase …
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Ultra-Narrow Laser Linewidth Measurement
… self-heterodyne interferometer (LC-RDSHI) for ultra-narrow linewidth measurement, including the theoretical analysis, experimental implementation, further modification on the system and more applications. Recently, less than 1kHz linewidth fiber lasers have been commercialized. But even the …
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Ultra Low-Voltage and Ultra Low-Power Integrated Circuits targeting IoT and Next-Generation Biosensing
L'abstract è presente nell'allegato / the abstract is in the attachment
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Investigation on Ultra-miniature and Ultra-low-power Non-invasive CMOS pH Sensor for Intracellular Monitoring
The intrinsic multilayer process and the dense transistor capacity of complementary metal oxide semiconductor (CMOS) technology has offered a great compact solution for miniaturized noninvasive pH sensors. Existing solutions to intracellular sensing are mainly through invasive approaches, which …
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Wärmeübertrag in der Ultra-Hochvakuum-Rasterwärmespektroskopie
… Arbeit habe ich ein RThM auf der Basis eines Ultra-Hochvakuum-Rastertunnelmikroskops (UHV-RTM) aufgebaut und einen geeigneten und einfach herstellbaren Temperatursensor entwickelt. Ziel der Arbeit war die Untersuchung des Mechanismus des Wärmeübertrags zwischen Probe und Sensor bei sehr …
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Ultra-Wideband Transceiver Design And Optimization
The technology landscape has quickly changed over the last few years. Developments in personal area networks, IC technology, DSP processing and bio-medical devices have enabled the integration of short range communication into low cost personal health care solutions. Newer technologies and …
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Sub-optimal Ultra-wide Band Receivers
Ultra-wide Band (UWB) has sparked a lot of interest lately from the industry and academia. The growing capacity of the wireless industry is requires a new communication system that satisfies the high data rate which does not interfere with existing RF systems. UWB promises to be this new …
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ULTRA - A Logic Transaction Programming Language
Rule-based language for the specification of complex database updates and transactions. Formal treatment of the syntax and the declarative semantics
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Ultra-Fast, Autonomous, Reconfigurable Communication System
<p>The recent years have witnessed an increase in natural disasters in which the destruction of essential communication infrastructure has significantly affected the number of casualties. In 2005, Hurricane Katrina in the United States resulted in over 1,900 deaths, three million land-line phones …
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Ultra-processed foods and cardiometabolic health
… was to investigate the associations between ultra-processed food consumption (UPF) and cardiometabolic health at the individual and the population-level while adhering to methodological principles such as incorporating and presenting a multiverse of statistical results and interpreting …
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Surface studies in ultra high vacuum
An ultra high vacuum system capable of attaining pressures of 10-12 mm Hg was used for thermal desorption experiments. The metal chosen for these experiments was tantalum because of its suitability for thermal desorption experiments and because relatively little work has been done using this metal. …
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Ultra-Wideband Microwave Imaging Radar System
A novel way to reduce the CPU run time and memory requirement of the nonlinear inverse scattering algorithms is also proposed in this study. We propose a code-division multiplexing scheme for the nonlinear inverse scattering algorithms to reduce the computational complexity by a factor proportional …
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Ultra-Cold Atoms on Optical Lattices
In the second half of the dissertation, we investigate the problem of vortex trapping in cyclically coupled Bose-Josephson junctions. Starting with N independent BECs we couple the condensates through Josephson links and allow the system to reach a stable circulation by adding a dissipative term in …
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Ultrafast Ultra-confined Plasmon Phonon Interactions
… and interrogating nanometrically confined ultrafast plasmon-phonon interactions. Nanometric plasmonic confinement is achieved by coupling the charge oscillations of a single gold nanoparticle to a gold substrate. This confines the plasmonic field to the single nanometre gap separating the two …
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An ultra high resolution FMCW radar
There is a great need for real-time non-intrusive measurements in industry. A short-range radar system can be used to make these measurements. A standard requirement for these type of applications is high resolution. This is a standard problem in radar. Using classical signal processing techniques, …
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