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Dissertations / Theses on the topic 'Particle measurements'

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1

Zheng, Feng. "Thermophoretic force measurements of spherical and non-spherical particles /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/9874.

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2

Rydefalk, Staffan. "Particle Measurements Using Fluctuations in the Regular Transmittance of Light Through a Particle Dispersion : Concentration and Particles size - Theory, Measurement Principles and Applications for Pulp and Paper Production." Doctoral thesis, KTH, Industriell produktion, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10639.

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The regular transmittance of light or similar radiation through a flowing suspension of particles fluctuates because of the random occurrence of particles in the beam.In the work presented here, a theory for this fluctuating behaviour with the emphasison dispersions of mm-length slender cylindrical particles having circular crosssections is given. The particles in question are wood pulp fibres, which as a first approximation are considered to have a cylinder shape. Four possible measurementprinciples are described theoretically and experimentally. The four principles are for the measurement of
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3

Mills, E. "Transputer instrumentation for particle flow measurements." Thesis, Nottingham Trent University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328227.

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4

Wardoyo, Arinto Yudi. "Biomass burning : particle emissions, characteristics, and airborne measurements." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16492/1/Arinto_Wardoyo_Thesis.pdf.

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Biomass burning started to attract attention since the last decade because of its impacts on the atmosphere and the environmental air quality, as well as significant potential effects on human health and global climate change. Knowledge of particle emission characteristics from biomass burning is crucially important for the quantitative assessment of the potential impacts. This thesis presents the results of study aimed towards comprehensive characterization of particle emissions from biomass burning. The study was conducted both under controlled laboratory conditions, to quantify the particle
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5

Wardoyo, Arinto Yudi. "Biomass burning : particle emissions, characteristics, and airborne measurements." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16492/.

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Biomass burning started to attract attention since the last decade because of its impacts on the atmosphere and the environmental air quality, as well as significant potential effects on human health and global climate change. Knowledge of particle emission characteristics from biomass burning is crucially important for the quantitative assessment of the potential impacts. This thesis presents the results of study aimed towards comprehensive characterization of particle emissions from biomass burning. The study was conducted both under controlled laboratory conditions, to quantify the particle
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6

Zhang, Zheng. "RESISTIVE PULSE SENSORS FOR POLLEN PARTICLE MEASUREMENTS." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145070142.

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7

Raghuvanshi, Anurag. "Particle filter with Hyperbolic Measurements and Geometry Constraints." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1366724596.

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8

Jessen, Wilhelm. "Particle image velocimetry measurements of film cooling flows /." Aachen : Mainz, 2008. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017075640&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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9

Thornton, Jenna Louise. "Ice particle size and roughness from novel techniques : in situ measurements and validation." Thesis, University of Hertfordshire, 2016. http://hdl.handle.net/2299/17644.

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The roughness of ice crystals, defined by small-scale surface roughness and large scale complexity, in high-altitude cloud, has been studied due to its important influence on the radiative properties of ice cloud. The Small Ice Detector 3 (SID-3) created at the University of Hertfordshire was used to measure the characteristics of individual ice crystals in situ. These are supplemented by a range of meteorological in situ measurements, including temperature, relative humidity, and wind velocity to investigate the influence of atmospheric conditions on ice crystal roughness/complexity. Since th
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10

Kemalli, Onur. "Measurements Of Velocity Profiles By Using Particle Image Velocimeter." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611068/index.pdf.

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Particle Image Velocimetry (PIV) is an optical technique used to display and evaluate the motion of fine particles in a flow. In this experimental study, velocity profiles are examined by PIV system and basic analysis methods are compared.
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11

Funes-Gallanzi, Marcelo. "Unsteady flow measurements in air using particle image velocimetry." Thesis, University of Warwick, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307299.

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12

Sanaye, Sepehr. "Computational aspects of particle image size and velocity measurements." Case Western Reserve University School of Graduate Studies / OhioLINK, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=case1058207972.

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13

Arellanes, Chuautemoc. "Measurements of reactive oxygen species in the particle phase." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1679290751&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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14

Daniel, Tamar Lynn. "High resolution scattering measurements for stationary particles." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/83787.

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Particle characterization is important to the aerospace field because particle ingestion in propulsion engines can lead to catastrophic failures. It has been shown laser based methodologies can determine size and concentration of spherical particles by using light extinction. However, when one moves to increasingly complex shapes one must take into consideration not only light extinction but multi angle light scattering. Cylindrical particles scatter light in a way that can be quantified by electromagnetic wave theory. This scattering distribution is directly related to the cylinders diameter
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15

Brigljević, Vuko. "Measurements of particle - antiparticle oscillations in the Bdo⁻B̄do system /." Zürich, 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13118.

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16

Meneguz, Elena. "Measurements of the properties of particle segregation in turbulent flows." Thesis, University of Newcastle Upon Tyne, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577190.

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This PhD thesis is devoted to the study of the motion of particles/droplets in turbulent flows with relevance to many industrial and environmental applica- tions. A mathematical model has been built to quantify the clustering or prefer- ential concentration of inertial particles into regions of strain and to gain an insight into the mechanism behind such an inertial process in incompressible turbulent flows. The model uses a powerful technique which is referred to here as the Full Lagrangian Method (FLM). This technique is based upon the calcu- lation of the fractional size of an elemental vol
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17

Baldi, Sandro. "Energy dissipation measurements in stirred vessels with particle image velocimetry." Thesis, King's College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409634.

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18

Day, Hugo Alistair. "Measurements and simulations of impedance reduction techniques in particle accelerators." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/measurements-and-simulations-of-impedance-reduction-techniques-in-particle-accelerators(35666138-5941-4c8b-95b3-7beeb3bdfb24).html.

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Wakefields and the corresponding frequency-domain phenomenon beam coupling impedance have been well studied for a number of years as a source of beam instabilities within particle accelerators. With the development of the Large Hadron Collider (LHC) and the large beam currents stored in the LHC during fills for physics production, wakefield driven instabilities and strong beam induced heating have become a limiting factors in luminosity production due to both instantaneous luminousity and the available time for collisions.In this thesis is presented an in depth study of the beam coupling imped
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19

Kail, Norbert. "Quantitative in-situ particle characterization using focused beam reflectance measurements." Düsseldorf VDI-Verl, 2009. http://d-nb.info/993097561/04.

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20

Hopper, Richard. "Accurate temperature measurements on semiconductor devices." Thesis, De Montfort University, 2010. http://hdl.handle.net/2086/3315.

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Self-heating can have a detrimental effect on the performance and reliability of high power microwave devices. In this work, the thermal performance of the gallium arsenide (GaAs) Gunn diode was studied. Infrared (IR) thermal microscopy was used to measure the peak operating temperature of the graded-gap structured device. Temperature measurements were experimentally validated using micro-thermocouple probing and compared to values obtained from a standard 1D thermal resistance model. Thermal analysis of the conventionally structured Gunn diode was also undertaken using high resolution micro-R
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21

Genc, Ayse Merve. "Power draw measurements as a method of characterization of particle aggregation." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12672.

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Power consumption is one of the critical parameters in optimization of industrial operations. In the present work, the power draw measurements were used as a method of characterizing and optimizing particle aggregation. A series of agglomerate flotation and oil agglomeration tests were carried out to find a correlation between power draw, particle aggregation and flotation performance. The experimental program included the agglomerate flotation of a complex nickel sulfide ore with fibrous gangue minerals, oil agglomeration of a fine suspension of bituminous coal used as model systems and oil
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22

DiSciacca, Jack Michael. "First Single Particle Measurements of the Proton and Antiproton Magnetic Moments." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:10951.

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We report a new comparison of the proton (p) and antiproton \((\bar{p})\) magnetic moments. In nuclear magnetons, \(\mu_p/\mu_N\) = 2.792 846 (7) [2.5 ppm], while \(\mu_{\bar{p}}/\mu_N\) = 2.792 845 (12) [4.4 ppm]. The unprecedented accuracy of the antiproton measurement is 680 times more precise than previous work. These first single-particle measurements provide a stringent test of CPT invariance. Our comparison, \(\mu_{\bar{p}}/\mu_p\) = -1.000 000 (5) [5.0 ppm], is consistent with the prediction of the CPT theorem. We also report the observation of a single proton spin flip, opening a pat
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23

Owens, Stephanie Anne. "Advances in measurements of particle cycling and fluxes in the ocean." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79284.

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Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Biology; and the Woods Hole Oceanographic Institution), 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>The sinking flux of particles is an important removal mechanism of carbon from the surface ocean as part of the biological pump and can play a role in cycling of other chemical species. This work dealt with improving methods of measuring particle export and measuring export on different scales to assess its spatial var
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24

Mason, Bernard James. "Aerosol cavity ring down spectroscopy : from ensemble to single particle measurements." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658637.

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Aerosol particles are prevalent in the atmosphere and impact the Earth's energy balance through scattering and absorption of incoming and outgoing radiation. Such particles represent one of the largest uncertainties when trying to characterise the anthropogenic causes in the Earth's changing radiation balance. This thesis describes the development of laboratory based techniques for measuring aerosol optical and microphysical properties that are atmospherically relevant. A single particle trapping technique that uses a Bessel-beam propagating counter to a' gas flow (Bessel-beam/gas-flow) is pre
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25

Doucet, Daniel Joseph. "Measurements of Air Flow Velocities in Microchannels Using Particle Image Velocimetry." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1333675768.

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26

Olson, Michael A. "Signal-to-Noise Measurements and Particle Focusing in Liquid-Core Waveguides." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4071.

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This thesis presents an analysis of the signal-to-noise ratio in liquid core anti-resonant reflecting optical waveguides (ARROWs) and the application of hydrodynamic focusing to the waveguides. These concepts are presented as a method to improve the detection capabilities of the ARROW platform. The improvements are specifically targeted at achieving single molecule detection (SMD) with the devices. To analyze the SNR of the waveguides a test platform was designed and fabricated. This test platform was then used to examine relationship between the SNR and the location of the excitation region.
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27

Wright, Matthew Darren. "Submicron particle size distribution and charge state in urban areas using mobility particle sizers : measurements and instrumentation considerations." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.544324.

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28

Yin, Chung-Yuan. "Soot particle size measurements in laminar premixed ethylene flames with laser-induced incandescence and scanning mobility particle sizer." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p1460029.

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Thesis (M.S.)--University of California, San Diego, 2009.<br>Title from first page of PDF file (viewed January 9, 2009). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 46-48).
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29

Zhu, Weijia. "A new instrumentation for particle velocity and velocity related measurements under water /." View online ; access limited to URI, 2006. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/fullcit/3239913.

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30

Eidhammer, Trude. "Determining particle index of refraction with measurements of scattering at two angles." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1296094721&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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31

Meyer, Jessica [Verfasser]. "Ice Crystal Measurements with the New Particle Spectrometer NIXE-CAPS / Jessica Meyer." Wuppertal : Universitätsbibliothek Wuppertal, 2013. http://d-nb.info/1033621218/34.

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32

Patchigolla, Kumar. "Particle process measurements : shape and size with crystal growth and nucleation kinetics." Thesis, Heriot-Watt University, 2007. http://hdl.handle.net/10399/2088.

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To deduce particle size information, the majority of particle sizing techniques assume that the particles are spheres. For industrial materials, particles are rarely spherical. Non-sphericity causes discrepancies in different measurement technologies so results vary from the real characteristics of the sample. Applications like crystallisation require .shape information in addition to the size of the particles. The majority of this thesis describes results that have demonstrated that particle shape has a strong influence on particle size distribution measured by different techniques. The effec
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33

Udrea, Doina Daciana. "High accuracy flow velocity measurements using particle image velocimetry : development and applications." Thesis, University of Warwick, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300743.

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34

Shapley, Nina C. "Laser Doppler velocimetry measurements of particle velocity fluctuations in a concentrated suspension." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/32699.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, February 2000.<br>Includes bibliographical references (p. 246-251).<br>Recent statistical constitutive models of suspensions of neutrally buoyant, non-Brownian, non-colloidal, solid spheres in Newtonian fluids suggest that the particles nijgrate in response to gradients in "suspension temperature," defined as the average kinetic energy contained in the particle velocity fluctuations. These models have not yet been compared systematically with experimental data. In addition, the "temperature" models assume iso
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35

Moon, Chi Young. "Particle Sensing in Gas Turbine Inlets Using Optical Measurements and Machine Learning." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101969.

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Propulsion systems are exposed to a variety of foreign objects that can significantly damage or impact their performance. These threats can range from severe dangers such as sandstorms and volcanic eruptions, which can induce engine failure in minutes, to condensation and moisture during ground tests that can negatively impact the engine's fuel efficiency. While numerous computational and experimental studies have investigated the effects of particle ingestion on the component level, an accurate in-situ measurement technique is needed for a systematic understanding of the effects and real-time
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36

Bilgen, Suheyla. "Dynamic pressure in particle accelerators : experimental measurements and simulation for the LHC." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP020.

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L’obtention de très faible pression (UHV) est une condition essentielle pour les accélérateurs de particules de haute énergie et de hautes performances. Par conséquent, la compréhension de l'évolution de la pression dynamique pendant le fonctionnement des accélérateurs est fondamentale afin de trouver des solutions qui permettent de minimiser les hausses de pression induites par de multiples phénomènes présents dans les lignes faisceaux. Pour le LHC, l'apparition d'instabilités peut être due à la succession de plusieurs processus. Tout d’abord, le faisceau de protons de haute intensité ionise
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37

Shimoda, Tadahiro. "Studies on the Improvement of In-Situ Plasma Particle Measurements in Space." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120666.

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38

Norris, Sarah Joan. "Sea spray : eddy covariance and near surface measurements of sea spray particles using a novel high-temporal resolution particle spectrometer." Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444043.

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39

O'Rourke, Abigail. "Measurements of top quark pair production cross-sections with the ATLAS experiment." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/measurements-of-top-quark-pair-production-crosssections-with-the-atlas-experiment(0ffdf00c-7fe4-4b70-bb9a-3106d8dc6aeb).html.

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This thesis presents measurements of inclusive and differential cross-sections for top quark pair-production in fiducial and full phase-space regions, as well as an analysis of gas compositions in the ATLAS inner detector cooling systems. The inclusive top-anti-top quark production cross-section was measured using a sample of 0.085 1/fb of proton--proton collisions recorded by the ATLAS experiment at centre-of-mass energy of 13 TeV, using dilepton top-anti-top quark events with an opposite-sign ee or ÂμÂμ pair in the final state. The numbers of events with exactly one and exactly two jets or
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40

Smith, Mark. "Measurements of indirect CP violation in charm at LHCb." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/measurements-of-indirect-cp-violation-in-charm-at-lhcb(aaeb5435-6310-46fa-81b1-6e45fa1af1c0).html.

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This thesis describes two pieces of work. The first is a study of the resolution of the LHCb vertex locator throughout Run 1. The second comprises analyses to measure the charm mixing and CP violation observables A_{Gamma} and y_{CP}.An estimate of the resolution of the LHCb vertex locator is required for use in the track fits. A method to measure the resolution with collision data has been developed and tested. The performance of the sub-detector throughout Run 1 of the LHC has been assessed. A significant degrading of the resolution has been seen. The effects of this on the track reconstruct
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41

Koch, Bernd. "Angular resolved measurements of particle and energy fluxes to surfaces in magnetized plasmas." Doctoral thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973051116.

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42

Wu, Hung-Jen. "Direct measurements of ensemble particle and surface interactions on homogeneous and patterned substrates." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3747.

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In this dissertation, we describe a novel method that we call Diffusing Colloidal Probe Microscopy (DCPM), which integrates Total Internal Reflection Microscopy (TIRM) and Video Microscopy (VM) methods to monitor three dimensional trajectories in colloidal ensembles levitated above macroscopic surfaces. TIRM and VM are well established optical microscopy techniques for measuring normal and lateral colloidal excursions near macroscopic planar surfaces. The interactions between particle-particle and particle-substrate in colloidal interfacial systems are interpreted by statistical analyses from
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43

Chopski, Steven. "PARTICLE IMAGE VELOCIMETRY MEASUREMENTS OF THE TOTAL CAVOPULMONARY CONNECTION WITH CIRCULATORY FLOW AUGMENTATION." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2096.

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This thesis project examined the interactive fluid dynamics between a blood pump and the univentricular Fontan circulation. 2-D particle image velocimetry (PIV) measurements were conducted on an idealized total cavopulmonary connection (TCPC) with an axial pump prototype in the inferior vena cava (IVC). Fluid velocity profiles were examined under various physiologic conditions for Fontan patients. The velocity profiles for all cases demonstrated the shunting of flow from the IVC toward the right pulmonary artery. A rotational component in the pump outflow was observed forcing flow to the peri
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44

Bhave, Prakash Viththal Seinfeld John H. "Air pollution at the single-particle level : integrating atmospheric measurements with mathematical models /." Diss., Pasadena, Calif. : California Institute of Technology, 2003. http://resolver.caltech.edu/CaltechETD:etd-05252003-091827.

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45

Sarra, Angela M. "Particle-wall shear stress measurements within the standpipe of a circulating fluidized bed." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2078.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains xi, 137 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 136-137).
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46

Flay, David. "Measurements of the Neutron Longitudinal Spin Asymmetry A1 and Flavor Decomposition in the Valence Quark Region." Diss., Temple University Libraries, 2014. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/286478.

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Physics<br>Ph.D.<br>The current data for the nucleon-virtual photon longitudinal spin asymmetry A1 on the proton and neutron have shown that the ratio of the polarized-to-unpolarized down-quark parton distribution functions, &Delta; d/d, tends towards -1/2 at large x, in disagreement with the perturbative QCD prediction that &Delta; d/d approaches 1 but more in line with constituent quark models. As a part of experiment E06-014 in Hall A of Jefferson Lab, double-spin asymmetries were measured in the scattering of a longitudinally polarized electron beam of energies 4.74 and 5.89 GeV from a lon
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47

Meißner, Marco [Verfasser], and Ulrich [Akademischer Betreuer] Uwer. "Measurements of particle production and particle correlations in proton-proton and proton-ion collisions with LHCb / Marco Meißner ; Betreuer: Ulrich Uwer." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180395409/34.

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48

Nes, Elena. "Derivation of photon energy spectra from transmission measurements using large fields : a dissertation /." San Antonio : UTHSC, 2006. http://proquest.umi.com/pqdweb?did=1324388751&sid=1&Fmt=2&clientId=70986&RQT=309&VName=PQD.

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49

Glen, Andrew. "A new optical particle counter for in situ measurements of stratospheric aerosol size distributions." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1400968731&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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50

Manser, John R. "Solid rocket motor plume particle size measurements using multiple optical techniques in a probe." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA296046.

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