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Dissertations / Theses on the topic 'Particles'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Mönckedieck, Mathias [Verfasser]. "Particle-particle interactions between tailored mannitol carrier particles and drug particles for inhalation / Mathias Mönckedieck." Kiel : Universitätsbibliothek Kiel, 2016. http://d-nb.info/1118500180/34.

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2

Ko, Lawrence Ching Leung. "Particle stimulated nucleation : deformation around particles." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/particle-stimulated-nucleation-deformation-around-particles(723ed7d0-21ea-43d5-bba7-22dab5226668).html.

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Second phase particles play an important role in the recrystallization of aluminium alloys. They give rise to high level of local lattice misorientation around the particle, in particle deformation zone (PDZ) during processing. These can act as potent nucleation sites for new recrystallized grains in a process known as particle stimulated nucleation (PSN). This mechanism is essential to produce material with a more random texture and small grain size, which helps e.g. ductility and formability. A new HRDIC technique is used here in combination with EBSD to investigate the evolution of deformat
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3

Petrosky, Brian Joseph. "Particle Image Velocimetry Applications of Fluorescent Dye-Doped Particles." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/52983.

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Laser flare can often be a major issue in particle image velocimetry (PIV) involving solid boundaries in a flow or a gas-liquid interface. The use of fluorescent light from dye-doped particles has been demonstrated in water applications, but reproducing the technique in an airflow is more difficult due to particle size constraints and safety concerns. The following thesis is formatted in a hybrid manuscript style, including a full paper presenting the applications of fluorescent Kiton Red 620 (KR620)-doped polystyrene latex microspheres in PIV. These particles used are small and monodispers
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4

Boskovic, Lucija. "Influence of Submicron Particle Shape on Behaviour during Filtration and Separation Processes." Thesis, Griffith University, 2008. http://hdl.handle.net/10072/366111.

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Filtration is the most efficient method of aerosol monitoring and control. A number of theories (Bradley, 1932); (Hamaker, 1937); (Johnson et al., 1971); (Wang and Kasper, 1991); (Dahneke, 1995); (Wall et al., 1990) have been developed to describe the particle interaction with surface of a filter and to estimate the probability of the particle adhesion onto a surface. A range of the particle, filter and process parameters could contribute to the strength of the adhesion. Some of them are: hardness and cross-sectional shape of the fiber, smoothness of either the fiber or particle, air humidity,
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5

Deng, Mao [Verfasser]. "Micro-Structure of Functional Particles and Particle Systems / Mao Deng." Kiel : Universitätsbibliothek Kiel, 2015. http://d-nb.info/1073868400/34.

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6

Zawadowicz, Maria Anna. "Understanding the chemistry of atmospheric particles using single particle mass spectrometry." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113793.

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Thesis: Ph. D. in Atmospheric Chemistry, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 197-219).<br>This thesis explores ways in which single particle mass spectrometry can be extended, whether through hardware improvements, or through the use of advanced data processing techniques to provide new kinds of aerosol chemistry measurements. Most of this work has been carried out using the Particle Analysis by Laser Mass Spectrometry (PALMS) instrument, an
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7

Dikken, Marcel den. "Particles : on the syntax of verb-particle, triadic, and causative constructions /." New York : Oxford university press, 1995. http://catalogue.bnf.fr/ark:/12148/cb412247666.

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8

Swartzel, Jeffrey M. "Rolling of an Elliptic-Shaped Particle in Two Dimensions: A Mathematical Model." Akron, OH : University of Akron, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1240522472.

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Thesis (M.S.)--University of Akron, Dept. of Mathematics, 2009.<br>"May, 2009." Title from electronic thesis title page (viewed 7/28/2009) Advisor, Dmitry Golovaty; Faculty Readers, Gerald Young, Patrick Wilber; Department Chair, Joseph Wilder; Dean of the College, Chand Midha; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
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9

Elhimer, Medhi. "The dynamics of neutrally buoyant particles in isotropic turbulence : an experimental study." Thesis, Toulouse, INPT, 2012. http://www.theses.fr/2012INPT0049/document.

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Le but de cette étude expérimentale est de caractériser la dynamique de particules solides, à flottabilité nulle, incluse dans un écoulement turbulent isotrope en décroissance libre. Les particules utilisées sont de forme sphérique et ont un diamètre de 4 à 5 fois plus grand que l'échelle spatial de Kolmogorov de l'écoulement. De part leur taille, les particules ont également un nombre de Stokes proche de l'unité. On s'attend alors à ce que ces particules aient une dynamique différente de celle du fluide environnant. Dans cette étude, ont se propose de quantifier les différences de vitesses en
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10

Dupont, Frédéric. "Mesure de durées de vie des hadrons beaux neutres et chargés avec le canal B-J/(psi)X, et J/(psi)-(mu)+(mu)- dans l'expérience DELPHI (LEP)." Université Joseph Fourier (Grenoble ; 1971-2015), 1994. http://www.theses.fr/1994GRE10057.

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Afin de mesurer les durees de vie separees des hadrons beaux neutres et charges, les donnees enregistrees en 1991 et 1992 par le detecteur delphi du lep ont ete analysees. Les hadrons b sont identifies par leur desintegration en j psi, suivi de la desintegration de celui-ci en une paire de muons. Les performances du detecteur permettent de reconstruire avec precision les longueurs de vol des b dans le plan r phi, de meme que leur impulsion par une technique de regroupement de particules en jet, dont le j psi constitue le noyau. Le temps propre est ainsi determine evenement par evenement. L'est
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11

Mack, Stuart Anderson. "Experimental and computational study of the behaviour of free-cells in discharging silos." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/experimental-and-computational-study-of-the-behaviour-of-freecells-in-discharging-silos(1f0b6130-7c2c-4a96-ad56-54ff71af2e98).html.

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This study aims to deduce an appropriate shape and density for an electronic free-cell that could be placed into a silo so that position and other desired physical parameters could be recorded. To determine how density and shape affects the trajectory and displacement of free cells, the trajectory and displacement of cylindrical, cuboid and triangular prism free-cells of equivalent volume was investigated in a discharging quasi 3D silo slice. The free-cells were placed at twelve different starting positions spread evenly over one half of the 3D slice. Tests were conducted using a monosized bat
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12

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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13

Wang, Fujing. "Pressure gradient and particle adhesion in the pneumatic transport of fine particles." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ28680.pdf.

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14

Sigurbjornsson, Omar Freyr. "Vibrational dynamics of icy aerosol particles : phase transitions and intrinsic particle properties." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2795.

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Phase transitions and other intrinsic properties (shape, size, architecture) of molecularly structured aerosol particles are important for understanding their role in planetary atmospheres and for technical applications. By combining bath gas cooling with time resolved mid-infrared spectroscopy and modeling, information is obtained on dynamic processes and intrinsic properties of fluoroform and ethane aerosol particles. The distinct infrared spectral features of fluoroform aerosol particles make it a particularly suitable model system. Homogeneous crystallization rates of the sub-micron sized
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15

Reed, Karl Matthew. "Wettability of solid particles in relation to particle-stabilised foams and emulsions." Thesis, University of Hull, 2011. http://hydra.hull.ac.uk/resources/hull:5598.

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Colloidal particles and surfactants are commonly used, either individually or combined, as stabilisers of emulsions and foams. While the properties of surfactants and particles under a range of conditions and concentrations are relatively well known, there are some areas that require further investigation. The wettability of colloidal particles is one of the main factors that determine how they behave in a given system but determining the wettability is difficult due to the small size of the particles. The Film Calliper Method (FCM) has been proposed as a simple technique for the direct measur
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16

Sarakini, Timon. "Image-based characterization of small papermakting particles - method development and particle classification." Thesis, KTH, Tillämpad fysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-181778.

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17

Andrea, Bergqvist. "Coating fine particles." Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-235233.

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Controlled release of an active is used in many applications. An example is drug delivery were it is desirable to release the active substance close to the target. In paints can anti-mold substances be encapsulated and released slowly during a long time which can extend the lifetime of the paint. This work investigated a coating process of loaded particles with as low leakage of the active substance as possible. It was also studied if the coating process was scalable. The particles in use were porous silica that was coated with sodium dodecyl sulphate (SDS), polyethyleneimine (PEI) and tetraet
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18

Hunt, Andrew. "Airborne magnetic particles." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333692.

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19

Abendroth, Scherf Nathalie Katharina. "Swedish Modal Particles." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20659.

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Diese Arbeit geht der Frage nach, ob MPn im Schwedischen syntaktisch Satzadverbien sind. Es wird gezeigt, dass sie sich syntaktisch von Satzadverbien unterscheiden und sich ferner in zwei getrennte Typen von MPn unterteilen lassen. Hierzu wird eine syntaktische Analyse vorgestellt, die diese Unterscheidung in dem phrasalen Status der MPn widerspiegelt. Die syntaktische Analyse wird durch sechs Experimente empirisch bestätigen. Ferner wird gezeigt, dass, um die Linearisierung von Elementen im Mittelfeld, am Beispiel von MPn, DPn und Objektpronomen im Mittelfeld, erklären zu können, nicht
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20

Vogt, Carsten. "Ultrafine particles in concrete : Influence of ultrafine particles on concrete properties and application to concrete mix design." Doctoral thesis, KTH, Betongbyggnad, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12161.

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21

Monegier, du Sorbier Quitterie. "Synthèse par polymérisation en émulsion d’objets hybrides dans le système silice/latex : Application à la granulation par voie colloïdale de l’alumine." Thesis, Limoges, 2016. http://www.theses.fr/2016LIMO0023/document.

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La synthèse d’objets hybrides silice/latex constitue le coeur de ce travail de doctorat ; il s’agit de recouvrir partiellement des particules de polystyrène par de la silice nanométrique. Pour cela la polymérisation en émulsion de la phase organique in-situ en présence de nanoparticules de silice a été sélectionnée, en présence d’auxiliaires organiques pour rendre les surfaces amphiphiles. Les premières formulations mises en oeuvre avec des tensioactifs n’ont pas conduit à la décoration des latex parce que la présence de ces molécules aux interfaces favorise plutôt la dispersion des latex, emp
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22

Lindemann, Dirk, Kristin Stirnnagel, Daniel Lüftenegger, et al. "Analysis of Prototype Foamy Virus particle-host cell interaction with autofluorescent retroviral particles." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-176566.

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Background The foamy virus (FV) replication cycle displays several unique features, which set them apart from orthoretroviruses. First, like other B/D type orthoretroviruses, FV capsids preassemble at the centrosome, but more similar to hepadnaviruses, FV budding is strictly dependent on cognate viral glycoprotein coexpression. Second, the unusually broad host range of FV is thought to be due to use of a very common entry receptor present on host cell plasma membranes, because all cell lines tested in vitro so far are permissive. Results In order to take advantage of modern fluorescent micros
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23

Gray, Sandria Lutrica. "Turbulence Modulation of Polydisperse Particles in a Square Particle-Laden Jet: Numerical Investigation." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/33445.

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The purpose of this study is to numerically investigate the turbulence modulation of polydisperse particles in a square particle-laden jet. Turbulence modulation describes the effects of fluctuating velocity and intensity when the particles and continuous fluid interact in a turbulent flow field. The rate at which turbulence modulation is altered is dependent upon parameters such as particle size, mass loading, Stokes number, coupling, volume fraction and mechanisms of turbulence modulation. This study modifies the analytical model developed by Yarin and Hetsroni (1993) to account for the t
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24

Lindemann, Dirk, Kristin Stirnnagel, Daniel Lüftenegger, et al. "Analysis of Prototype Foamy Virus particle-host cell interaction with autofluorescent retroviral particles." BMC, 2010. https://tud.qucosa.de/id/qucosa%3A28868.

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Background The foamy virus (FV) replication cycle displays several unique features, which set them apart from orthoretroviruses. First, like other B/D type orthoretroviruses, FV capsids preassemble at the centrosome, but more similar to hepadnaviruses, FV budding is strictly dependent on cognate viral glycoprotein coexpression. Second, the unusually broad host range of FV is thought to be due to use of a very common entry receptor present on host cell plasma membranes, because all cell lines tested in vitro so far are permissive. Results In order to take advantage of modern fluorescent micros
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25

Pushpawela, Buddhi G. "The formation and characteristics of new particles in the atmosphere." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/122854/2/__qut.edu.au_Documents_StaffHome_StaffGroupH%24_halla_Desktop_Buddhi_Pushpawela_Thesis.pdf.

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Airborne particles play a major role in climate change and human health. Drawing on the results of extensive measurements carried out in the relatively clean environment of Brisbane and the heavily polluted megacity of Beijing, this thesis has significantly furthered our knowledge of the physical mechanisms of new particle formation in the lower atmosphere. Several characteristics of new particle formation events, such as their temporal distribution, the effect of wind speed and the role of atmospheric ions on the particle formation rate, were investigated for the very first time.
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26

Gulcu, Besim. "Incipient Motion Of Coarse Solitary Particles." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610420/index.pdf.

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In this study the incipient motion of coarse solitary particles having different specific weights and shapes was investigated. A tilting flume of rectangular cross-section having a net working length of 12 m was used through the experiments. The slope of the channel and the discharge in the channel are the two basic variable parameters that determine the initiation of motion. Particles made of cement and mixture of cement and iron dust in certain ratios were used in the experiments with an obstructing element of various heights right behind the particles. Dimensionless hydraulic parameters det
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27

He, Congrong. "Airborne Particles in Indoor Residential Environment: Source Contribution, Characteristics, Concentration, and Time Variability." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16017/1/Congrong_He_Thesis.pdf.

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The understanding of human exposure to indoor particles of all sizes is important to enable exposure control and reduction, but especially for smaller particles since the smaller particles have a higher probability of penetration into the deeper parts of the respiratory tract and also contain higher levels of trace elements and toxins. Due to the limited understanding of the relationship between particle size and the health effects they cause, as well as instrument limitations, the available information on submicrometer (d < 1.0 µm) particles indoors, both in terms of mass and number concentr
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28

He, Congrong. "Airborne Particles in Indoor Residential Environment: Source Contribution, Characteristics, Concentration, and Time Variability." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16017/.

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The understanding of human exposure to indoor particles of all sizes is important to enable exposure control and reduction, but especially for smaller particles since the smaller particles have a higher probability of penetration into the deeper parts of the respiratory tract and also contain higher levels of trace elements and toxins. Due to the limited understanding of the relationship between particle size and the health effects they cause, as well as instrument limitations, the available information on submicrometer (d < 1.0 µm) particles indoors, both in terms of mass and number concentr
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29

Hunt, Eden Meyer. "The formation of nanosized metallic particles in oxide substrates via ion implantation-induced reduction." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19415.

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30

Valdés, Julio R. "Fines migration and formation damage - microscale studies." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/19303.

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31

Waldman, Zachary J. "Majorana Neutrinos in the Jacob-Wick phase convention." Diss., Online access via UMI:, 2008.

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32

Garcia-Lopez, Alicia. "Hybrid model for characterization of submicron particles using multiwavelength spectroscopy." Scholar Commons, 2005. http://scholarcommons.usf.edu/etd/2889.

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The area of particle characterization is expansive; it contains many technologies and methods of analysis. Light spectroscopy techniques yield information on the joint property distribution of particles, comprising the chemical composition, size, shape, and orientation of the particles. The objective of this dissertation is to develop a hybrid scattering-absorption model incorporating Mie and Rayleigh-Debye-Gans theory to characterize submicron particles in suspension with multiwavelength spectroscopy.Rayleigh-Debye-Gans theory (RDG) was chosen as a model to relate the particles joint property
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33

Zheng, Xiao-Qin Materials Science &amp Engineering Faculty of Science UNSW. "Packing of particles during softening and melting process." Awarded by:University of New South Wales. School of Materials Science & Engineering, 2007. http://handle.unsw.edu.au/1959.4/31517.

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Softening deformation of iron ore in the form of sinter, pellet, and lump ore in the cohesive zone of an ironmaking blast furnace is an important phenomenon that has a significant effect on gas permeability and consequently blast furnace production efficiency. The macroscopic softening deformation behavior of the bed and the microscopic deformation behavior of the individual particles in the packed bed are investigated in this study using wax balls to simulate the fused layer behavior of the cohesive zone. The effects of softening temperature, load pressure, and bed composition (mono - single
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34

Mihaylova, Dessislava Dimitrova. "Submicron Particles and Inflammation." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18590.

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Iron nanoparticles occur naturally in the environment, but their exposure increases dramatically due to the field of nanotechnology and –medicine. It is poorly understood how the intracellular cooperative mechanisms of submicron particles and microorganisms function on mammalian immune system. In this study, superparamagnetic iron oxide (SPIO) submicron particles will be used to benefit the research within environmental diseases, addressing the biocompatibility of these particles. The size-dependent effects in the immune system of two carboxyl coated SPIO particles with stated sizes 100 nm and
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35

Pniower, Justin C. "Particles, objects and physics." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425707.

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36

Li, Fan. "Interactions between fine particles." Thesis, University of Leicester, 2009. http://hdl.handle.net/2381/4494.

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Computer simulation using the Discrete Element Method (DEM) has emerged as a powerful tool in studying the behaviour of particulate systems during powder flow and compaction. Contact law between particles is the most important input to the Discrete Element simulation. However, most of the present simulations employ over-simplistic contact laws which cannot capture the real behaviour of particulate systems. For example, plastic yielding, material brittleness, sophisticated particle geometry, surface roughness, and particle adhesion are all vitally important factors affecting the behaviour of pa
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Zand, Daniëlle D. van't. "Particles in complex fluids." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4610.

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This thesis describes experimental studies of colloidal particles dispersed in solvents which themselves have phase transitions. One common definition of soft matter is: a material characterized by a mesoscopic length scale. This length scale is, for example, the colloid size or the ordered domain size. Here we combine a complex host with one characteristic length scale with dispersed particles that have a different size. It might be anticipated that new behaviour will occur. Two limits of particle characteristics are probed: the case of dilute sterically-stabilized particles and the case of a
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Sehra, A. S. "Particles under extreme conditions." Thesis, Swansea University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638791.

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In part I we study quantum modified photon trajectories in a Schwarzschild blackhole spacetime. The photon vacuum polarization effect in curved spacetime leads to birefringence, i.e. the photon velocity becomes <i>c</i>±<i>δc </i>depending on its polarization. This velocity shift then results in modified photon trajectories. We find that photon trajectories are shifted by equal and opposite amounts for the two photon polarizations, as expected by the sum rule. Therefore, the critical circular orbit at <i>u</i> =1/3<i>M</i> in Schwarzschild spacetime, is split depending on polarization as <i>u<
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Yang, Jiankai. "Measuring adhesion between particles." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/21276/.

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40

Paras, Jonathan (Jonathan Steven). "Sintering of small particles." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119066.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 34-36).<br>An atomistic approach to modeling the sintering of nanocrystalline alloys has been developed. It has been shown that there exist alloys that exhibit both nanostructured stability and undergo an accelerated sintering process [1], [2]. However, the widespread adoption of such alloys has been limited by a lack of understanding of the processing kinetics that lead to the accelerated sintering ph
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41

Imoto, Yu, and Takashi Odagaki. "Diffusion on diffusing particles." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193282.

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We investigate random walk of a particle constrained on cells, where cells behave as a lattice gas on a two dimensional square lattice. By Monte Carlo simulation, we obtain the mean first passage time of the particle as a function of the density and temperature of the lattice gas. We find that the transportation of the particle becomes anomalously slow in a certain range of parameters because of the cross over in dynamics between the low and high density regimes; for low densities the dynamics of cells plays the essential role, and for high densities, the dynamics of the particle plays the dom
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42

Kirillova, Alina. "Stimuli-Responsive Janus Particles." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-201847.

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Janus particles, named after the two faced Roman god Janus, possess unique asymmetry and combine two distinct functions at their opposite sides, allowing them to target complex self-assembled architectures and materials inaccessible for homogeneous building blocks. In this study, three areas regarding the topic of Janus particles were explored: the synthesis of Janus particles, their (self-) assembly, and applications. In the first part of the work, we have drawn our attention to the optimization of the synthetic procedures concerning the preparation of Janus particles and to the extending of
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43

Imoto, Yu, and Takashi Odagaki. "Diffusion on diffusing particles." Diffusion fundamentals 6 (2007) 11, S. 1-7, 2007. https://ul.qucosa.de/id/qucosa%3A14185.

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We investigate random walk of a particle constrained on cells, where cells behave as a lattice gas on a two dimensional square lattice. By Monte Carlo simulation, we obtain the mean first passage time of the particle as a function of the density and temperature of the lattice gas. We find that the transportation of the particle becomes anomalously slow in a certain range of parameters because of the cross over in dynamics between the low and high density regimes; for low densities the dynamics of cells plays the essential role, and for high densities, the dynamics of the particle plays the dom
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44

Lin, Qianqi. "Electroanalysis of solid particles." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:1b2868bf-4fa6-47e8-8a6e-8a7172af812d.

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This thesis reports theoretical and experimental work with the primary aim of developing new electrochemical methods to detect and characterise solid particles at the micron scale, specifically alumina (aluminium oxide) particles and graphene nanoplatelets, as representative of insulating and conductive particles, respectively. The fundamentals of thermodynamics, kinetics and mass transport in electrochemistry are introduced in Chapter 1, with the elaboration of electrodes, voltammetry and chronoamperometry used for electroanalysis. A comparison of non-electrochemical and electrochemical techn
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45

Williams, Rebecca T. "Particles in Welding Fumes." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7382.

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The purpose of this study was to investigate whether or not differing base metals and filler wires used during welding processes contributed to differing amounts of ultrafine particles (UFP) and nanoparticles being emitted during the welding procedure. The study was also conducted to determine UFP and nanoparticle exposure in the breathing zones of the welders as well as the breathing zones of pipefitters and fire watchers, who commonly sit 6ft behind the welding arc. In order to determine if UFP and NP exposures differed with base metal and filler wire, all welding processes utilized the same
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Ems, Matthieu. "Emission et visualisation de particules de frein : Application sur un banc de freinage à échelle réduite intégrant des conditions d’écoulement représentatives." Electronic Thesis or Diss., Valenciennes, Université Polytechnique Hauts-de-France, 2025. https://ged.uphf.fr/nuxeo/site/esupversions/b30c690c-13f6-4cc8-a488-d7e5afdbe1e7.

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Réduire les émissions de particules, notamment les PM10, les PM2.5 et les ultrafines (&lt;100nm) est devenu un enjeu environnemental et de santé publique. Leur dispersion dans l'environnement proche au cours du freinage à friction est liée, d'une part, aux sollicitations thermomécaniques à l'interface garniture – disque, et d'autre part, à l'encombrement sous véhicule qui va influencer leur trajectoire initiale. Cette thèse fait partie du projet BREAQ visant à réduire l'exposition aux particules fines issues du freinage ferroviaire. Les travaux présentés dans ce mémoire s'intéressent plus part
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Woodside, Steven Murray. "Spatial distribution of acoustic forces on particles : implications for particle separation and resonator design." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0007/NQ34646.pdf.

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Schaap, Allison Schaap. "Transport and size-separation of airborne particles in a microchannel for continuous particle monitoring." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/30230.

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Microfluidics research and development has emerged as a novel and promising tool for the development of sensors and actuators. However, one area in which microfluidics has been only minimally employed is in the handling of airborne particles, or aerosols. The real-time monitoring of aerosols is important for protecting human health and earth’s environment. The small size of microchannels, coupled with the opportunity to integrate sensing technologies, suggests them as a promising tool for the next generation of aerosol sensors. To that end, this thesis presents a microfluidics-based system
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49

Theerachaisupakij, Woraporn. "Particle-layer formation in aerosol flow by simultaneous deposition and reentrainment of fine particles." 京都大学 (Kyoto University), 2002. http://hdl.handle.net/2433/149824.

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Hitchins, Jane. "Dispersion of particles from vehicle emissions." Thesis, Queensland University of Technology, 2001.

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