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 225 for “"Active Area"”.
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Deciphering climatic controls on sedimentation in a tectonically active area, Cyprus
… of Cyprus is considered to be a tectonically active period coeval with major climatic change. Uplift, associated with the activities of the supra-subduction zone to south of island was concomitant with global cooling, the expansion of the Northern Hemisphere Ice Sheets and the Middle …
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Band anti-crossing modelling and characterization of multi quantum well gainnas for photovoltaic application
… the localisation defect, and the impact of mesa active area on the electrical and photo-electrical properties of a diode. Hence, our motivations are simulating the GaInNAs electronic band transition, analyse the localisation defect and investigate an impact of mesa active area on the diode …
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FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance
… are developed via FDTD having sub-wavelength active areas that yield enhanced optical absorption at near-infrared (NIR) wavelengths by way of plasmonics or photonic nanojets. The response time of photodiodes is primarily limited by two factors: (1) the transit time of photo-generated carriers …
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Optimisation of Hall cross devices towards magnetic particle counting
… stray field of that particle averaged over the active area of the cross. As the active area size increases relative to the particle size, due to the solenoidal nature of the particle’s stray field, this average tends towards zero. As a result, large area Hall sensors suffer from low single …
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Low platinum loading electrospun electrodes for proton exchange membrane fuel cells
… loading and particle size on the electrochemical active area and oxygen reduction performance of the sputtered platinum. Active area per weight catalyst decreased with sputtering time, and the oxygen reduction activity slightly increases with increasing sputtering time. Both of these effects are …
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Distributed photomixers
… waveguide to couple the beat signal to an active area whichis large relative to the terahertz wavelength. This large, traveling-wave mode active area distributes the heat load from absorbed optical power and ohmic heating from photocurrent and avoids the RC rolloff associated with a …
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Phase-locked loop using time-based integral control
… integrators using oscillators prove to be more area efficient and highly digital when implemented in integrated circuits. To better explore their potential area saving benefits, the time-based techniques are implemented to serve the integral control of a type-II PLL. A comprehensive analysis is …
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TaleBlazer : indoor positioning
… be played outdoors. Indoor positioning is an active area of research. This thesis will explore and evaluate a variety of more sophisticated alternatives to an existing, simple indoor positioning scheme for TaleBlazer. None of the explored indoor positioning techniques were satisfactory as a …
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Survey of Generalized Contact Structures
… in string physics, and has developed into an active area of research. Very recently, an odd dimensional analogue of a generalized complex structure, namely a generalized contact structure, has been introduced in the works of Vaizman, Poon and Wade. In this thesis, we survey the recent works on …
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High-performance reference frequency generation techniques
… the proposed clock multiplier occupies an active area of 0.16mm2 and achieves 366fsrms integrated jitter at 4.752GHz output frequency while consuming 6.5mW power from a 1.0V supply of which 1.5mW is consumed in the quadrupler. Heavily duty-cycled communication systems that implement …
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Efficient superconducting-nanowire single-photon detectors and their applications in quantum optics
… applications are cryogenic operations, small active areas, and efficiency-speed tradeoffs. This thesis presents the effort to address these challenges. A fiber-coupled SNSPD system with a large-area detector in a closed-cycle cryocooler has been built, demonstrating 24% system detection …
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Analysis of R-2R digital-to-analog converter with equal current switching
… It is shown that for such architecture, the active area of the DAC grows as the resolution increases due to higher matching requirement needed. A fully binary-weighted DAC suffers from well-known differential linearity problems and large switching glitches at the output, while a fully …
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MATHEMATICAL MODELING OF LIAL/FES¬2 HIGH TEMPERATURE BATTERY SYSTEM
… includes the effects of precipitation salt on active area in the electrode and the discharge capacity. In addition, the model also takes the change in volume of the active material into account during the electrochemical reactions by incorporating the change in porosity of the electrode and the …
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Integrated Real-Time Control And Processing Systems For Multi-Channel Near-Infrared Spectroscopy Based Brain Computer Interfaces
… with regard to cognitive task selection, active area locations and lateralized motor cortex activation separability. This dissertation will also present methods that have been implemented to allow reduced hardware requirements in future NIRS-BCI development. We will also examine the …
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Optimizing CRISPR/Cas9 Gene Targeting to Investigate Cone Photoreceptor Development in the Chick Retina
… to regenerate these cone photoreceptors is an active area of study. In order to find ways to regenerate cones, the molecular pathways and gene regulatory networks that a retinal progenitor cell takes to develop into a postmitotic cone photoreceptor needs to be well understood. In an attempt to …
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Design & implementation of a wireless sensor prototyping kit
… wireless sensor networks (WSN) has become an active area of research among computer scientists. In this work, JONA, a prototyping kit for wireless sensors, will be described. The intention of this kit is to open WSN research to interested parties outside of the electrical engineering and …
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Efficiency Improvement of Cross-Compound Parabolic Concentrator for Silicon and Dye-sensitised Solar Cells
… blade deposition of successive layers. The active area was increased from 0.5 cm2 to 1 cm2, and performance tests were conducted for each active area measurement. A similar yet annealed silver coating approach was employed directly to the receiver edges on the ITO to combine two core …
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Generative methods for image synthesis with applications to medical imaging
… methods for image synthesis have been an active area of research in recent years. In this thesis, we explore the use of a hybrid model of generative adversarial networks (GANs) and transformer networks for image synthesis. We propose a method that combines GANs with transformer networks to …
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Microstructural Control of Aluminum/aluminum Oxide Electrochemistry: Aluminum/aluminum Oxide Photonic Devices
… in a single sheet of aluminum foil with an active area of over 30 cm 2. Power consumption as low as 0.8 W with a luminance of 500 cd/m 2 has been observed in 600 Torr of Ne. These devices are promising for advanced displays and backlighting technology.
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A 4th order continuous-time [Delta] [Epsilon] ADC with VCO-based integrator and quantizer
… 87 mW from a 1.5V supply and occupying an active area of 0.45 mm2 demonstrated. A key innovation is the explicit use of the oscillator's output phase to avoid the signal distortion that had severely limited the performance of earlier VCO-based ADC's, which exclusively made use of the output …
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