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 57 for “"large arrays"”.
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New Approach to finding Active Element Patterns for Large Arrays
… approach to active-element pattern analysis, for large phased array antennas, was created using Floquet's theorem. The classic approach to finding active-element patterns uses a full array simulation that can become slow and produce patterns that are specific to certain elements in the array, …
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Optimal configuration of large arrays of floating bodies for ocean wave energy extraction
Ocean wave energy is a large, and mostly untapped potential source of renewable energy worldwide. The scope of engineering solutions for harvesting wave energy is vast, ranging from wave-induced oscillating bodies, to overtopping devices and oscillating water columns. One particularly interesting …
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Effect of disorder on the vortex dynamics in superconducting Josephson junction arrays and clusters
… disorder on the transport properties of large Josephson junction arrays and clusters. In large arrays, intrinsic random disorder results in the washing out of features in the magnetoresistance. It also gives rise to multiple onsets in the resistive transition as a function of temperature. …
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Image Processing on Mpp-Like Arrays (Massively Parallel Processor)
The desirability and suitability of using very large arrays of processors such as the Massively Parallel Processor (MPP) for processing remotely sensed images is investigated. The dissertation can be broken into two areas.
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Asynchronous differential power processing for true maximum power point tracking of photovoltaic sub-modules
… (PV) sub-module level, but in the context of large arrays. Central communication carries large overheads, and neighbor-to-neighbor communication can have long propagation times in large arrays, so a communication-less solution was explored. An MPPT algorithm that could be run asynchronously …
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Data relocation and prefetching for programs with large data sets
… contain nested loop structures that process large arrays of data. The execution of these loop structures often produces memory preference patterns that poorly utilize data caches. Limited associativity and cache capacity result in cache conflict misses. Also, non-unit stride access patterns …
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An exploratory study of the use of cognitive strategies by faculty members and their students in associate degree nursing education
… manage their complex environments with the large arrays of information. Cognitive theories, which are concerned with the thinking, perception, and other intellectual functioning of an individual, served as the theoretical background for the study.
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Characterization of a molded plastic array of ten microplasma jet devices
… characteristics and potential applications of arrays of microplasma jets. In this thesis, the basic plasma physics in addition to the necessary fabrication and experimental techniques are discussed. Finally, the operating characteristics of a particular type of microplasma jet array are …
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Fabrication of nonlithographic semiconductor quantum wire infrared photodetector
… technique that is capable of producing large arrays of semiconductor quantum wires of a variety of materials and on different substrates. The operational principles, design procedure as well as the implementation of the quantum wire photodetectors using electrochemical anodization will …
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Ionically-Coupled Non-Linear Variable Resistors for Neuromorphic Applications
… memristor-like non-linear resistors for use in large arrays to form cellular neural networks is developed and investigated. The device is based on the action of ion intercalation of lithium ions into PEDOT:PSS active layers causing resistance to increase, similar to a memristor. A simple model …
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Synthesis and alignment of gold nanorods for optical applications
… is to help elucidate simplistic ways to create large arrays of patterned gold nanorods through shear and directed assembly.
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Innovative Tiling Methodologies for the Synthesis of Phased Array Antennas for Advanced Radar and Communications Systems
… to deal with the synthesis of low/medium-size arrays. Based on the same optimal theorems and still exploiting the algorithmic procedures at the basis of the enumerative approach, an innovative schemata-bas ed optimization method is introduced for designing large arrays, as well. A set of …
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Coherently-coupled vertical-cavity laser arrays
… vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease. Previous work on coherently-coupled VCSEL arrays has left …
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Argos: Practical Base Stations for Large-scale Beamforming
… beamforming (MUBF). However, realizing such a large-scale design is nontrivial, and has yet to be achieved in the real world. We present the design, realization, and evaluation of Argos, the first reported large-scale base station that is capable of serving many (e.g., 10s of) terminals …
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Analysis of Fabry-Pérot laser resonators stabilized by microlenses and applications in speckle-free imaging
In this work, laser arrays comprising thousands of beams are experimentally demonstrated by stabilizing macroscopic Fabry-Pérot resonators with microlens arrays. The cavity parameters are tunable to either force fundamental-mode lasing across the array or to promote oscillation of various …
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Study of CMOS process variation by multiplexing analog characteristics
… to detailed analog device characteristics in large arrays of test devices. Front end of line (FEOL) test structures include transistors of different sizes, number of polysilicon fingers, polysilicon fingers proximity, and orientation, for both NMOS and PMOS MOSFETs. Back end of line (BEOL) …
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Performance analysis of subaperture processing using a large aperture planar towed array
… propagation with high transmission loss. Large aperture planar arrays have the potential to improve detection performance due to their high resolution and high gain, but are suceptible to two main performance degradation mechanisms: limited spatial coherence of signals and nonstationarity …
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Sensorless temperature estimation and control of Peltier devices
… This method will enable the production of large arrays of TED-driven SMA tendon actuators, particularly for large DOF robotic systems.
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Theory and application of planar ion traps
… microfabrication, and can be scaled up to large arrays with multiple trapping zones. We implement these designs on printed circuit boards with macroscopic ions, allowing us to study the traps while avoiding the experimental challenges of atomic ion traps. We discuss the dynamics of ions in …
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In-System Testing of Configurable Logic Blocks in Xilinx 7-Series FPGAs
… congestion problems in modern FPGAs that have a large number of logic blocks. This thesis presents an improved BIST architecture for all Xilinx 7-Series FPGAs that is scalable to large arrays. The two primary sources of overhead associated with FPGA BIST, the test time and the memory required for …
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