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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 18 of 18 for “"fiber probe"”.
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Label-free DNA Sequence Detection Using Oligonucleotide Functionalized Fiber Probe with a Miniature Protrusion
… is simple. With capture DNA immobilized onto the probe by layer-by-layer selfassembly, the hybridization of a complementary strand of target DNA increases the optical thickness of the probe. Three kinds of sensors were developed. The optical fiber tip sensor has been demonstrated with good …
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Investigation of local velocities and phase holdups, and flow regimes and maldistribution identification in a trickle bed reactor
… and implementing a new two-tip optical fiber probe technique. It was found the radially and axially the liquid and gas velocities and their saturation vary and they also vary with times. In various locations, due to non-uniform distribution of the flowing phases, there are windows of …
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Design, fabrication and testing of a fiber optic stress/strain sensor for soft stretchable materials using polarization imaging technique
… with free space bulk optics. In this study, a fiber optic based system is developed to investigate the potential application of this technology on the strain/stress as well as surface roughness measurements of stretchable materials. In this system, polarizers are simply attached to the fiber …
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Development of optical fiber laser array method for assessing quality of chip packages
… of all sizes. This new system uses an optical fiber array consisting of two optical fiber probes, instead of the single fiber probe used in the original inspection system. This array is used to generate ultrasonic vibrations in chip packages while laser interferometry measures the induced …
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A study of thermographic phosphor thermometry in an operating turbofan engine
… are temperature dependent An optical fiber probe was used to carry the excitation laser light to the blade surface, and to receive the resulting fluorescence. The blades rotated at speeds up to 30,000 rpm. Synchronization was achieved by a digital pattern recognition circuit, capable …
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Hydrodynamics of trickle bed reactors (TBRS) packed with industrial catalyst using advanced measurement techniques
… of Gamma-ray densitometry (GRD) and Optical fiber probe and conventional measurement techniques of high-frequency differential pressure transducer and load cell. Two different reactor sizes of bench and pilot plant scale were used. Bench-scale TBR carried out the experiments to assess phase …
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Development of an intracoronary Raman spectroscopy
… of a flexible, small diameter (< 2 mm) optical fiber probe to guide light to and from the arterial wall in situ. The fact that Raman scattering has inherently low signal intensity, combined with the need for a small diameter probe, makes it difficult to develop a probe with sufficient …
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Studies of multiphase distribution and flow in bubble/ slurry bubble columns with /without internals and advanced sustainable construction materials using sophisticated measurement techniques
… gamma-ray densitometry (GRD) and point optical fiber probe (OFP) techniques. The obtained results indicated that increasing the solids loading increased the solid holdup and decreased the liquid holdup.</p><p>However, the gamma-ray computed tomography (γ-CT) technique has been employed to …
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Impact of vertical internals on the hydrodynamics and heat transfer coefficient in a gas-solid fluidized bed
… measurement techniques such as advanced optical fiber probe for local solids and bubble hydrodynamics measurements, differential pressure transducer for pressure fluctuation measurements, advanced fast response heat transfer probe for local heat transfer coefficient measurements, probe-single …
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Chemical Sensing as a Utility using Swept-Source Raman Spectroscopy
… these challenges. First, we introduce the SSRS fiber-probe that allows to measure Raman spectra with a single-point detector and only a few milliwatts of tunable laser excitation. We validate the probe design by monitoring nitrate fertilizer in a hydroponic setup, in environmental water samples, …
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Experimental investigation of local properties in two-phase fluid-flow hydrodynamics
… to 0.65 m/s, respectively; A dual-tipped optical-fiber probe was constructed and mounted to a 3-degree-of-freedom traversing mechanism above the channel to obtain cross-sectional profiles at a distance of 23.0 cm down inside of the flow channel. A Visual Basic software program was created for the …
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Fluid Dynamics And Scale-Up Of Bubble Columns With Internals
… by means of the four-point optical fiber probe as a measuring technique. In addition, the liquid phase mixing is investigated. The effects of the presence of cooling tubes, which are commonly used in industrial applications of bubble columns, are thoroughly investigated in columns of …
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Optical low coherence reflectometery for morphological characterization of static and dynamic systems
… Reflectometer. It uses 9 micron single mode fibers as both the test probe (fixed mirror equivalent) and reference (moving mirror equivalent) legs of a fiber optic Michelson interferometer system. The optical design is based on low coherence (broad bandwidth) light that results in a nominal …
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Development and characterization of fiber-based systems for biomedical imaging
… of biomedical imaging with the use of optical fiber probes across three different disciplines. This includes the design and development of novel fiber optic based techniques and instruments in fields of optical coherence tomography (OCT), bioremediation and optical mapping of cardiac action …
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Reconstruction of the Temperature Profile Along a Blackbody Optical Fiber Thermometer
<p>A blackbody optical fiber thermometer consists of an optical fiber whose sensing tip is given a metallic coating. The sensing tip of the fiber forms an isothermal cavity, and the emission from this cavity is approximately equal to the emission from a blackbody. Standard two-color optical fiber …
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Multifunctional Polymer Fiber Probes for Biomedical Application
… of thermally drawn multifunctional polymer fiber probes for modern biomedical applications, primarily in the fields of neural interfaces and tumor treatments. Understanding the neural basis of behavior requires monitoring and manipulating combinations of physiological elements and their …
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Untersuchungen an biologischen Proben mit verschiedenen Raman- und SERS-spektroskopischen Techniken
… empfindlicher, insbesondere biologischer Proben. Das Ziel dabei ist, ein Werkzeug zur Verfügung zu stellen, mit dem es möglich ist, detaillierte Informationen über die Inhaltsstoffe einer Probe und deren räumlichen Verteilung zu sammeln. Diese Daten sind beispielsweise für die …