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 735 for “"High-sensitivity"”.
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Portable high sensitivity ionization meter
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1941.
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Polarization diverse tracking antenna with high sensitivity
… airborne telemetry platforms is presented. The High Sensitivity Diverse Tracking Antenna (HSDTA) is capable of receiving both left and right hand circular polarizations and has RF auto-tracking capability. Novel placement of RF terminations throughout the design allows for HSDTA to be installed …
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High Sensitivity NMR in a Microfluidic Context
Contains fulltext : 222403.pdf (Publisher’s version ) (Open Access)
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High sensitivity pathogen detection assays from crude samples
… complex food matrices such as ground beef where high amounts of protein, fats, and other inhibitors affect the sensitivity of the assay. Our biphasic approach allowed us to detection E. coli with an LOD of 33 cfu/g within 2.5 hours of sample collection without complicated instruments except for a …
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Supercontinuum radiation for ultra-high sensitivity liquid-phase sensing
… is simple to implement, robust and achieves a sensitivity of 9.1 × 10−7 cm−1 Hz−1/2 at a wavelength of 550nm for dye species dissolved in water. SC-CEAS is not calibration-free and for this purpose a second technique, a time-resolved variant called broadband cavity ring-down spectroscopy …
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High sensitivity DNA detection using gold nanoparticles and conducting polymers
… for infectious diseases. In order to enhance the sensitivity of electrochemical detection of DNA, novel conducting polymer- metal nanoparticle composites have been created. An electrode modified with nanostructured gold (AuNP-elec) has been used to increase the surface of the electrode and …
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Contributions to a Context-Aware High Sensitivity GNSS Software Receiver
… provide location and navigation solutions with high reliability and accuracy with low-cost portable user devices. However, receiver performance can be significantly affected by operational environments. High attenuation and severe multipath fading degrade the signal tracking performance and …
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High-Sensitivity Nitrogen-Vacancy Center Magnetometry: from DC to GHz
… the prospect of comparable magnetic field sensitivity, the performance of NV bulk magnetometers sensing low-frequency fields continues to lag behind that of their atomic vapor cell and superconducting counterparts by about three orders of magnitude. Detecting GHz-frequency fields compares …
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Extension of Moire interferometry into the ultra-high sensitivity domain
… be very small even when strains are large, ultra-high sensitivity is required. The specific objective was displacement sensitivity of 50 nm per fringe contour, which corresponds to that of moire with 20,000 lines per mm, in combination with spatial resolution of the optical microscope (2-5 μm). …
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Cavity coupled photonic crystal enhanced fluorescence for high sensitivity biomarker detection
With the rise in fluorescence-based testing of biomarkers in samples, the use of dielectric optical resonators has increased dramatically. These photonic crystals make fluorophores emit more light through a process called enhanced fluorescence which in turn allows for more signal to be collected …
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The Relationship Between High Sensitivity C-Reactive Protein, Metabolic Syndrome and Exercise
… between inflammatory markers, such as high sensitivity C-reactive protein (hs-CRP), and physical activity. Elevated hs-CRP appears to be an independent predictor of both CVD and diabetes. Recent evidence also suggests that hs-CRP is positively associated with all metabolic syndrome …
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Improving High Sensitivity GNSS Receiver Performance in Multipath Environments for Vehicular Applications
… are affected by the surrounding objects, such as high buildings, trees, etc., which will introduce multipath errors. Multipath arises from the reception of reflected or diffracted signals in addition to the line-of-sight (LOS) signal, and is one of the most detrimental error sources in GNSS …
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High-sensitivity Full-field Quantitative Phase Imaging Based on Wavelength Shifting Interferometry
… For this type of QPI techniques, the cost is high and the integration of different imaging modes requires nontrivial hardware modifications. Another limiting factor is insufficient sensitivity. In QPI, sensitivity characterizes the system repeatability and determines the quantification …
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Spectral domain interferometry: A high-sensitivity, high-speed approach to quantitative phase imaging
… of low coherence from broadband light source, high sensitivity from spectral domain interferometry and the high speed from the spectral modulation technique to achieve quantitative phase measurement with free of speckle, high temporal sensitivity (~0.1nm) and fast imaging rate. The principles …
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Design of a MEMS-based optical accelerometer with large measurable range and high sensitivity
… suffer from a number of drawbacks, such as low sensitivity due to low signal-to-noise ratio (SNR), small dynamic range, high temperature sensitivity, etc. In this thesis, a MEMS-based optical accelerometer is designed and analyzed. The device can be fabricated on a silicon-on-insulator (SOI) …
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Psychological Stress and High Sensitivity C-Reactive Protein Levels in Overweight and Obese Men
<p><strong>Background and Purpose</strong>. High sensitivity C-reactive protein (hs-CRP), a measure of inflammatory response, is now considered an independent marker for coronary heart disease. Psychological stress also affects the immune system and influences the inflammatory response. Ladwig, et …
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High-Speed and High-Sensitivity Metal-Semiconductor-Metal Photodetectors for Optoelectronic Integrated Circuit Applications
A variety of techniques to enhance the sensitivity and bandwidth of front-illuminated MSMPDs is presented, proposed, and demonstrated. A reduction in the absorption layer thickness of a conventional InGaAs-based MSMPD enabled bandwidths in excess of 19 GHz, at a wavelength of 1.55 $\mu$m, to be …
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Development of ultracompact, high-sensitivity, space-based instrumentation for far-infrared and submillimeter astronomy
… and the required spectral resolution and sensitivity. [mu]-Spec is a direct-detection spectrometer operating in the 450-1000-[mu]m regime, which employs superconducting microstrip transmission lines to achieve a resolution (R >/= 1200) and be integrated on a ~10-cm² silicon chip. The …
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