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 29 for “"Bowtie"”.
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Fabrication and applications of pillar bowtie nanoantenna arrays
… technique and applications of a pillar bowtie nanoantenna (p-BNA). We use different tools to fabricate our nanostructure, namely, electron lithographic tools, evaporator and plasma chambers. The theory of operation of the machines, especially electron beam lithography for higher …
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Efficient parallelization of Bowtie 2 with OpenCL on GPU
… and developers. Among all the sequence aligners, Bowtie 2 is one of the most commonly used, due to its high speed and accuracy. This thesis presents a parallel implementation of Bowtie 2 with OpenCL, which is a parallel programming model that is becoming widely known and receiving great interest …
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Nonlinear optical emission and near-field enhancement effects in arrays of gold bowtie nano-antennas
… enhancements from periodic arrays of gold bowtie nano-antennas (BNAs) after illumination by laser light. Specifically, we focus on laser-induced damage, nonlinear optical emission, and a proof-of-concept for utilizing arrays of gold BNAs to enhance the forces in an optical trapping system. …
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Manipulation of Light-Matter Interaction in Two-Dimensional Systems via Localized Surface Plasmons
… periodically patterned two-dimensional arrays of bowties were investigated to study the localized surface plasmon (LSP) resonances via reflection measurements and numerical simulations. Due to the grating created by arrays of bowties, a new, lattice-coupled LSP (lattice-LSP) mode emerged. …
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Unlocking single molecule detection sensitivities in surface-enhanced Raman spectroscopy
… substrates to fabricate sub-5nm gap bowtie arrays. Toward that end, centimeter-scale nanosphere assembly with large grain sizes of 150μm is demonstrated for hydrophilic silicon substrates. The resulting hexagonally symmetric gold bowtie arrays present three different bowtie motifs …
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FPGA acceleration of short read alignment with high-level synthesis
… room for improvement. This thesis improves on Bowtie 2, an aligner that is already very popular and high-performing. Through the use of OpenCL, it is possible to parallelize this application for both GPU and FPGA by using the same code. Several different levels of parallelism are implemented in …
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Investigation of optical near field using near field scanning optical microscopy
… Ridge apertures with shapes like bowtie and C can be used to focus light into sub-diffraction limit spot with enhancement. This localization of the field near the exit of a bowtie aperture is investigated with a home built aperture NSOM. The experiment results confirm the …
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Performance comparison of five RNA-seq alignment tools
… to compare the accuracy and sensitivity of the Bowtie, Bowtie2, GMAP, Tophat and GNUMAP tools, their alignment accuracy for approximately 1 million simulated reads of chromosome one was evaluated using these five alignment tools. Bowtie has the highest accuracy, which is 92.42%, while GMAP has …
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Pillar-supported plasmonic nanoantennas for optical nanotweezers and optical audio applications
… within the nanometer-sized gaps of plasmonic bowtie nanoantennas (BNAs) are orders of magnitude larger than those of conventional optical tweezers. Accordingly, plasmon-enhanced gradient forces can both significantly relax constraints for microparticle manipulation and offer a route for …
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Optical nano-antennas: Fabrication, characterization and applications
… infrastructure, and ambient conditions. Using bowtie antennas as representative of the general class of optical nano-antennas, I show how optical imaging can be used as a simple tool to characterize their resonant behavior. Further understanding of their spatial and spectral modes is gathered …
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AN INVESTIGATION OF SHORT RANGE ELECTROMAGNETIC WAVE COMMUNICATION FOR UNDERWATER ENVIRONMENTAL MONITORING UTILISING A SENSOR NETWORK PLATFORM
… found unsuitable for use underwater. A 433MHz bowtie antenna was modelled in HFSS and shown to perform well in both air and potable water without any matching circuit. The antenna was prototyped on a printed circuit board, waterproofed and tested successfully in a tank. Furthermore to eliminate …
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Plasmonic nanoantennas for multipurpose particle manipulation and enhanced optical magnetism
… and confinement properties of arrays of Au bowtie nanoantennas (BNAs) for plasmonic optical trapping. Using BNAs as a model system, the delicate interplay between optical and thermally induced forces in plasmonic nanotweezers is investigated over a broad parameter spacing including bowtie …
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Inverse Design of Random Emitters in Nanophotonics
… derived for LDOS, but simple geometries such as bowtie are 2-3 orders of magnitude away from this limit. By computational optimization of air-void cavities in metallic substrates, we show that the LDOS can reach within a factor of ≈ 10 of the upper limits, and within a factor ≈ 4 for the …
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Uncertainty Analysis of the Performance of a System of Best Management Practices for Achieving Phosphorus Load Reduction to Surface Waters
… Organization of Standardization (ISO) 31010 Bowtie Risk Analysis Tool to analyze the performance of the phosphorus management system. The effectiveness of agricultural best management practices (BMPs) and their adoption were combined into a Bayesian belief network model to predict watershed …
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The Systemic Risk of Consolidation in the Cloud Computing Industry
… actors in this industry. The next section uses a bowtie analysis to frame for discussion the key risks related to cloud computing. This framework is used to analyze how the economic risks of compromise and unavailability have changed with a shift from on premise computing to cloud computing. A …
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A Compact RF/Photonic Antenna using a Quantum Dot Mode Locked Laser as a Source
… network is designed to match the QDMLL to a bowtie slot antenna. The RF/Photonic integrated prototype is tested and analyzed over a wide frequency range. Finally a QDMLL-integrated-phased antenna array is designed to achieve beam steering. By manipulating the applied voltage bias of each …
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RNA-sequence analysis of human melanoma cells
… (NCBI 36.1 [hg19] assembly) using Tophat and Bowtie software's. Then, using Cufflinks software the alignments are assembled into gene transcripts and relative abundances are obtained. Finally, differentially expressed genes are found by comparing the affected samples with a control sample. The …
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THE USE OF CONDUCTIVE INK IN ANTENNA EDUCATION AND DESIGN
… other structures. These antennas consist of a bowtie cross-dipole over a reflective disc with conductive-ink grounded structures. In addition to the GNSS antennas, a linear elliptical dipole over a reflective disc with conductive grounded structures is presented. This elliptical antenna design …
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Flat optics based on patterned nanostructures for concentrating light
… former case, we developed pillar-supported Au bowtie nanoantennas (pBNAs), and found that light concentration in these structures leads to both a large field enhancement and thermal response. We found that intrinsic absorption in the pBNAs leads to significant heating, the result of which could …
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Optical studies of colloidal quantum dots : optical trapping with plasmonic nanoapertures and thermal recovery from photoinduced dimming
… Silica coated QDs were optically trapped using bowtie apertures in a thin silver film with low incident flux of 1.56 MW/cm 2 at 1064 nm. Additionally, QDs emitted upon trapping via two-photon excitation from the trapping laser due to strong field enhancement inside the aperture. The second goal …
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