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Dissertations / Theses on the topic 'Emission de particule'

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Published: 3 May 2025
Last updated: 31 July 2025

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1

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 (<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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2

Fraboulet, David. "Emission cyclotronique ionique dans les plasmas de Tokamak." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10127.

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La detection des produits de fusion (3. 5mev) sera d'importance majeure pour la realisation d'une decharge continue dans les reacteurs de fusion thermonucleaire. Du fait de leur giration cyclotronique, les particules emettent dans la bande radiofrequence rf: 10-500mhz. Notre but est de determiner dans quelle mesure la detection du rayonnement rf issu d'un plasma de reacteur peut renseigner sur ces produits de fusion. Experimentalement, nous avons montre que le rayonnement rf emis par des particules rapides situees au centre de la decharge est detectable. Nous proposons ensuite deux modeles com
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3

BONNAZ, RAPHAËL. "Désintégration des systèmes hadroniques dans des modèles de quarks constituants." Université Joseph Fourier (Grenoble), 2001. http://www.theses.fr/2001GRE10099.

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Cette etude porte sur la desintegration de mesons dans des modeles de quarks constituants. Ces derniers sont presentes ainsi que les differents potentiels d'interaction qq employes. La desintegration forte d'un meson en deux ou trois mesons fait l'objet de la seconde partie. Le modele 3p 0 original est presente ainsi que la recherche d'une fonction de vertex (p) dependant de l'impulsion de la paire qq creee. On montre qu'une fonction (p) de type constante + gaussienne se revele superieure a la constante utilisee habituellement. La deuxieme partie est consacree aux transitions electromagnetique
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4

Wang, Lina. "Quantification of particle emission characteristics and development of an emission model for use in transport microenvironments affected by traffic emissions." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/46912/1/Lina_Wang_Thesis.pdf.

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Vehicle emitted particles are of significant concern based on their potential to influence local air quality and human health. Transport microenvironments usually contain higher vehicle emission concentrations compared to other environments, and people spend a substantial amount of time in these microenvironments when commuting. Currently there is limited scientific knowledge on particle concentration, passenger exposure and the distribution of vehicle emissions in transport microenvironments, partially due to the fact that the instrumentation required to conduct such measurements is not avail
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5

Brenac, Ariel. "Développements instrumentaux pour la photoémission inverse." Grenoble 1, 1987. http://www.theses.fr/1987GRE10010.

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Canon a electron fournissant un faisceau dans la gamme 5 ev-50 ev: resolution en vecteur d'onde de 0,2 a**(-1), courant maximal de 25 microamperes a 20 ev. Les spectres de photoemission inverse resolue angulairement presentent des effets angulaires a 30 ev. A 10 ev les effets angulaires devraient etre plus marques mais de faible rendement du spectrometre a cette energie rend les experiences difficiles. Caracterisation de nouvelles sources d'electrons: electrons emis par effet du champ par une cathode comprenant un grand nombre de micropointes. Ces cathodes fonctionnent a basse temperature. Des
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6

Nord, Kent. "Particles and unregulated emissions from CI engines subjected to emission control /." Luleå : Luleå University of Technology, 2005. http://epubl.luth.se/1402-1544/2005/09.

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7

Aloupogiannis, Panagiotis. "Etude theorique et experimentale des effets de matrice en analyse par emission de rayons x induite par particules chargees (pixe) : etablissement d'une nouvelle methode de correction dite des "parametres alpha"." Paris 7, 1988. http://www.theses.fr/1988PA077002.

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8

Ding, Yijun, and Yijun Ding. "Charged-Particle Emission Tomography." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621830.

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Conventional charged-particle imaging techniques--such as autoradiography--provide only two-dimensional (2D) images of thin tissue slices. To get volumetric information, images of multiple thin slices are stacked. This process is time consuming and prone to distortions, as registration of 2D images is required. We propose a direct three-dimensional (3D) autoradiography technique, which we call charged-particle emission tomography (CPET). This 3D imaging technique enables imaging of thick sections, thus increasing laboratory throughput and eliminating distortions due to registration. In CPET, m
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9

Rojas, Néstor Y. "Diesel exhaust system influences on transient particulate emissions and particle size distribution." Thesis, University of Leeds, 2001. http://etheses.whiterose.ac.uk/2292/.

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The behaviour of particulate matter emissions from a Ford XLD 4T, passengercar diesel engine through a practical exhaust system in place was investigated during transient conditions, namely cold start and fast acceleration. Particulate emissions were measured at four sampling points through the exhaust system and the changes in particulate total mass concentration, total number concentration, particle size distribution and Carbon/SOF fractions were determined for various engine operating conditions. Each cold start test consisted of a step-change cold-start with fast acceleration, reaching one
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10

Johansson, Petter. "Oil-related Particle Emissions from Diesel Engines." Licentiate thesis, Stockholm : Maskinkonstruktion, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9287.

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11

Guo, Li. "Measurement and control of particulate emissions from cattle feedlots in Kansas." Diss., Kansas State University, 2011. http://hdl.handle.net/2097/8549.

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Doctor of Philosophy<br>Department of Biological & Agricultural Engineering<br>Ronaldo G. Maghirang<br>Emissions of particulate matter (PM) are an increasing concern for large open beef cattle feedlots. Research is needed to develop science-based information on PM emissions and abatement measures for mitigating those emissions. This research was conducted to (1) measure PM concentrations emitted from large cattle feedlots, (2) compare different samplers for measuring concentrations of PM with equivalent aerodynamic diameter of 10 µm or less (PM10), (3) evaluate the relative effectiveness of pe
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12

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

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13

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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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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15

Weimer, Silke. "Particle emission of traffic and wood combustion and its impact on spatial distributions of submicron particulate matter /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17995.

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16

Whelan, Paul. "Raman microscopy studies of carbon particles from diesel particulate matter (DPM) and coal dust." Thesis, Sheffield Hallam University, 2001. http://shura.shu.ac.uk/17384/.

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Diesel Particulate Matter (DPM) and coal dust samples were characterised using Raman microscopy, X-ray Photoelectron Spectroscopy (XPS), Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), Thermo-Gravimetric Analysis (TGA), X-ray Fluorescence (XRF) spectrometry and Scanning electron Microscopy. The sp2/sp3 carbon bonding ratios for DPM and coal dust were determined as 6.1 and 0.7, respectively, from XPS. Principal Component Analysis (PCA) was successfully implemented as a tool for distinguishing between the very similar DPM and coal dust Raman spectra, with over 99% of the va
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17

Ballard, Keith Richard. "Particle acceleration and synchrotron emission in blazars." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/26210.

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An optical and infrared observing programme which provides the most detailed information yet available for blazars is described. From this it is possible to make progress in understanding the physical processes which are occurring on the smallest scales within the emission region. Later theoretical calculations including a treatment of synchrotron emission incorporating losses and a realistic source geometry are presented together with a model of particle acceleration at relativistic shocks in disordered magnetic fields. The work contained in this thesis can explain the radiation and make pred
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18

Johnson, Ben T. "Experimental analysis of crankcase oil aerosol generation and control." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10968.

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Crankcase ventilation contributes significantly to diesel engine particulate emissions. Future regulations will not only limit the mass of particulate matter, but also the number of particles. Controlling the source of crankcase emissions is critical to meeting the perennial legislation. Deficiency in the understanding of crankcase emissions generation and the contribution of lubricating oil has been addressed in detail by the experimental study presented in this thesis. A plethora of high speed laser optical diagnostics techniques have been employed to deduce the main mechanisms of crankcase
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19

Radman, Jennifer. "Particle flow visualization in hydrocyclones using the positron emission particle tracking technique." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123037.

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The technique of Positron Emission Particle Tracking (PEPT), developed at University of Birmingham in the late 1980s has become a powerful tool to track particles flowing in various industrial engineering applications. Hydrocyclones are extensively used in a widespread amount of applications for many industries, but are predominantly used in closed circuit grinding operations as classifiers in mineral processing. Many attempts have been made to capture the key relationships between hydrocyclone operating and geometrical variables in models, but hydrocyclone characterization is still heavily e
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20

Surawski, Nicholas C. "An investigation of gaseous and particulate emissions from compression ignition engines operated with alternative fuels, injection technologies, and combustion strategies." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/54194/1/Surawski_Thesis_2011.pdf.

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Whilst the compression ignition (CI) engine exhibits many design advantages relative to its spark ignition engine counterpart; such as: high thermal efficiency, fuel economy and low carbon monoxide and hydrocarbon emissions, the issue of Diesel Particulate Matter (DPM) emissions continues to be an unresolved problem for the CI engine. Primarily, this thesis investigates a range of DPM mitigation strategies such as alternative fuels, injection technologies and combustion strategies conducted with a view to determine their impact on the physico-chemical properties of DPM emissions, and consequ
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21

Mazaheri, Mandana. "Investigation into submicrometer particle and gaseous emissions from airport ground running procedures." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/29183/1/Mandana_Mazaheri_Citation.pdf.

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Emissions from airport operations are of significant concern because of their potential impact on local air quality and human health. The currently limited scientific knowledge of aircraft emissions is an important issue worldwide, when considering air pollution associated with airport operation, and this is especially so for ultrafine particles. This limited knowledge is due to scientific complexities associated with measuring aircraft emissions during normal operations on the ground. In particular this type of research has required the development of novel sampling techniques which must take
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Mazaheri, Mandana. "Investigation into submicrometer particle and gaseous emissions from airport ground running procedures." Queensland University of Technology, 2009. http://eprints.qut.edu.au/29183/.

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Emissions from airport operations are of significant concern because of their potential impact on local air quality and human health. The currently limited scientific knowledge of aircraft emissions is an important issue worldwide, when considering air pollution associated with airport operation, and this is especially so for ultrafine particles. This limited knowledge is due to scientific complexities associated with measuring aircraft emissions during normal operations on the ground. In particular this type of research has required the development of novel sampling techniques which must take
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23

Johnson, Lynne Alison. "Modelling particle emissions from traffic flows." Thesis, Queensland University of Technology, 2000.

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24

Puchakayala, Madhu Babu. "Mercury emission behavior during isolated coal particle combustion." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1153.

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25

Chun, Ka-him, and 秦嘉謙. "Single-particle inductively coupled plasma atomic emission spectrometry." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/209488.

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Transient emission of a particle in inductively coupled plasma-atomic emission spectrometry (ICP-AES) depends on the fundamental processes of aerosol desolvation, particle vaporization and atomization, ionization, excitation and diffusion of the analyte. Ideally, the rate of the above processes can be determined from the evolution of the transient emission as the ion plume moves along the central channel of the ICP. However, the dimension of the ion plume is significantly smaller than the central channel. The signal-to-background and signal-to-noise ratios suffer when the entire channel is ima
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26

Droubi, Mohamad Ghazi. "Monitoring particle impact energy using acoustic emission technique." Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/2661.

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The estimation of energy dissipated during multiple particle impact is a key aspect in evaluating the abrasive potential of particle-laden streams. A systematic investigation of particle impact energy using acoustic emission (AE) measurements is presented in this thesis with experiments carried out over a range of particle sizes, particle densities and configurations. A model of the AE impact time series is developed and validated on sparse streams where there are few particle overlaps and good control over particle kinetic energies. The approach is shown to be robust and extensible to cases w
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27

Downard, Jared Matthew. "Particulate emissions of tire combustion." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4615.

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The disposal of used tires represents an environmental and health hazard, especially when large stockpiles of tires start on fire. This study focuses on ambient particulate matter samples collected during the Iowa City landfill tire fire and laboratory emissions of tire combustion. Levels of elemental (EC) and organic carbon (OC), metals, polycyclic aromatic hydrocarbons (PAH), azaarenes and oxygenated PAH (oxy-PAH) were determined by thermo-optical analysis, high precision mass, inductively-coupled plasma mass spectrometry and gas chromatography mass spectrometry. Results demonstrate that tir
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28

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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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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30

Sproch, Norman K. "PDI-PIXE-MS: Particle Desorption Ionization Particle-Induced X-Ray Emission Mass Spectrometry." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/194827.

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Incident ions, from a Van de Graaff accelerator, in the MeV energy range, deposit their energy into the near surface of a sample. This, in turn, causes atomic, molecular, cluster and fragment ion species to be desorbed and ionized, while simultaneously emitting characteristic elemental X-rays. The multielemental X-rays provide qualitative elemental information, which may be deconvoluted and fit to a theoretical X-ray spectrum, generated by a quantitative analysis program, GUPIX, while the atomic, molecular, cluster, and fragment ion species are identified using a quadrupole mass spectrometer
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31

Patra, Aditya Kumar. "Particulate matter emission from paved road surfaces." Thesis, Imperial College London, 2006. http://hdl.handle.net/10044/1/11860.

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32

Gomes, Nogueira Ana Paula. "Particulate Matter Emission Issues in Brake Systems." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/348039.

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Automotive brake systems are source of particulate matter (PM) emissions, particularly in the urban areas. Several human ill-health are related with this kind of pollution. Along tire wear, road wear and dust from resuspension, the brake wear comprises the most relevant non-exhaust source of road traffic related emissions. Aiming at studying the PM brake emissions, this thesis is composed of an introductory part containing the main concepts and the state of art of the main subjects; and the experimental part, which comprehends three investigations. Chapters 2, 3, 4 and 5 are dedicated to th
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33

Keogh, Diane Underwood. "Development of a particle number and particle mass emissions inventory for an urban fleet : a study in South-East Queensland." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/30297/1/Diane_Keogh_Thesis.pdf.

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Motor vehicles are a major source of gaseous and particulate matter pollution in urban areas, particularly of ultrafine sized particles (diameters < 0.1 µm). Exposure to particulate matter has been found to be associated with serious health effects, including respiratory and cardiovascular disease, and mortality. Particle emissions generated by motor vehicles span a very broad size range (from around 0.003-10 µm) and are measured as different subsets of particle mass concentrations or particle number count. However, there exist scientific challenges in analysing and interpreting the large da
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Keogh, Diane Underwood. "Development of a particle number and particle mass emissions inventory for an urban fleet : a study in South-East Queensland." Queensland University of Technology, 2009. http://eprints.qut.edu.au/30297/.

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Motor vehicles are a major source of gaseous and particulate matter pollution in urban areas, particularly of ultrafine sized particles (diameters < 0.1 µm). Exposure to particulate matter has been found to be associated with serious health effects, including respiratory and cardiovascular disease, and mortality. Particle emissions generated by motor vehicles span a very broad size range (from around 0.003-10 µm) and are measured as different subsets of particle mass concentrations or particle number count. However, there exist scientific challenges in analysing and interpreting the large da
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35

Sironi, Lorenzo. "Particle Acceleration and Nonthermal Emission in Relativistic Astrophysical Shocks." PRINCETON UNIVERSITY, 2012. http://pqdtopen.proquest.com/#viewpdf?dispub=3481715.

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36

Williams, Dennis Andrew. "A study of anisotropic particle emission from oriented nuclei." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363998.

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37

Hedayetullah, Amin Mohammad. "Optimization of identification of particle impacts using acoustic emission." Thesis, Robert Gordon University, 2018. http://hdl.handle.net/10059/3116.

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Air borne or liquid-laden solid particle transport is a common phenomenon in various industrial applications. Solid particles, transported at severe operating conditions such as high flow velocity, can cause concerns for structural integrity through wear originated from particle impacts with structure. To apply Acoustic Emission (AE) in particle impact monitoring, previous researchers focused primarily on dry particle impacts on dry target plate and/or wet particle impacts on wet or dry target plate. For dry particle impacts on dry target plate, AE events energy, calculated from the recorded f
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38

Gundogdu, Ozcan. "Multiple particle tracking using the Birmingham positron emission camera." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549174.

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Birmingham Positron Imaging Centre has the only known Positron Camera dedicated solely for industrial processes. It has been successfully applied to numerous industrial processes as a non-invasive imaging method such as oil flow in engines, flow in rocks and extrusion processes. A novel technique of particle tracking has been developed at the University of Birmingham using a single radio nuclide labelled particle as a tracer. This technique allowed non-invasive monitoring of industrial processes such as mixing, gas fluidised beds and rotating drums. It provided important information about the
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39

Roux, Wynand Pieter. "Positron emission particle tracking inside a laboratory batch jig." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/61331.

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The movement of particles inside a jig ultimately determines the efficiency of the jig. The movement of these particles is a function of the particle properties (size, density and shape) and the jigging parameters (pulse shape, water flow, etc.). The purpose of this study was to investigate how particle properties affect the movement of particles inside a jig. Positron Emission Particle Tracking (PEPT) is one of the few techniques that can trace the movement of particles inside an enclosed system without interfering with the particle flow and has successfully been used to study mills, hydrocyc
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Dunshee, James Robert. "Evaluation Of The Engine Exhaust Particle Sizer (eeps) For Real-Time Measurements Of Diesel And Biodiesel Exhaust Particulate Matter." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/547.

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Even at low concentrations, the criteria air pollutant particulate matter (PM) is an environmental and public health hazard. Emissions levels legislated for modern diesel vehicles are so low (~90% lower than 2003) that it has become difficult to accurately measure PM by the regulatory metric: the mass of particles collected on a filter (i.e., the gravimetric method). Additionally, gravimetric analysis cannot measure real-time emission rates, and therefore is unable to characterize high-emitting transient events (e.g., engine starts, stop-and-go driving). By an alternate method, PM can be estim
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41

Bordas, Mariano. "Possibilites offertes par l'utilisation simultanee des methodes pixe (particle induces x-ray emission) et pige (particle induced gamma-ray emission) en analyse elementaire." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13009.

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42

Bordas, Mariano. "Possibilités offertes par l'utilisation simultanée des méthodes PIXE, Particle Induced X-ray Emission, et PIGE, Particle Induced Gamma-ray Emission, en analyse élémentaire." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376120482.

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43

Price, Philip Daniel. "Direct injection gasoline engine particulate emissions." Thesis, University of Oxford, 2009. http://ora.ox.ac.uk/objects/uuid:35c0d6bf-bde3-4ef0-a87e-4af89a94b16f.

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Direct fuel injection technology is increasingly being applied to the spark ignition internal combustion engine as one of the many actions required to reduce the CO2 emissions from road transport. Whilst the potential for CO2 reductions is compelling, the technology is not without disadvantages. Early examples typically emitted over an order of magnitude more Particulate Matter (PM) than vehicles with conventional spark ignition engines. Consequently, future revisions to European and North American exhaust emissions legislation are likely to regulate the particulate emissions from vehicles wit
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Babaie, Meisam. "Reduction of diesel engine exhaust emissions using non-thermal plasma technology." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/81593/1/Meisam_Babaie_Thesis.pdf.

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Non-thermal plasma (NTP) is a promising candidate for controlling engine exhaust emissions. Plasma is known as the fourth state of matter, where both electrons and positive ions co-exist. Both gaseous and particle emissions of diesel exhaust undergo chemical changes when they are exposed to plasma. In this project diesel particulate matter (DPM) mitigation from the actual diesel exhaust by using NTP technology has been studied. The effect of plasma, not only on PM mass but also on PM size distribution, physico-chemical structure of PM and PM removal mechanisms, has been investigated. It was fo
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Gerazounis, Stylianos. "Design and development of a particulate emission monitor." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326226.

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46

Yao, Wenchuo. "Emission of Insoluble Mineral Particles from Ultrasonic Humidifiers." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/99237.

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Ultrasonic humidifier use is a potential source of human exposure to inhalable particulates. This paper focused on the behavior of insoluble iron oxides particles, and aluminum oxide particles in ultrasonic humidifiers. 10 mg/L Fe oxide particles and 5 mg/L Al oxide suspension solutions were added into tap water, as fill water for ultrasonic humidifiers operated for 14 hours. Denser, heavier particles of approximate 1.5 um diameter of iron or aluminum oxides accumulated in the humidifier reservoir. Smaller, suspended metal oxide particles of 0.22-0.57 um diameter were emitted as aerosols from
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47

Wang, Hao. "Formation mechanisms of secondary organic aerosols in relation to laser printer emissions." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/47442/1/Hao_Wang_Thesis.pdf.

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Due to their large surface area, complex chemical composition and high alveolar deposition rate, ultrafine particles (UFPs) (< 0.1 ìm) pose a significant risk to human health and their toxicological effects have been acknowledged by the World Health Organisation. Since people spend most of their time indoors, there is a growing concern about the UFPs present in some indoor environments. Recent studies have shown that office machines, in particular laser printers, are a significant indoor source of UFPs. The majority of printer-generated UFPs are organic carbon and it is unlikely that these par
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48

DaCosta-Cloix, Olivier. "Emission cyclotronique ionique dans les tokamaks." Palaiseau, Ecole polytechnique, 1995. http://www.theses.fr/1995EPXX0030.

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L’émission cyclotronique ionique (ice) présente un grand potentiel comme diagnostic des ions rapides, en particulier des particules alpha de fusion, dans les tokamaks. Nous présentons les résultats expérimentaux pendant l'expérience préliminaire tritium de jet. Les spectres de l'ice présentent jusqu'a 11 pics étroits et régulièrement espaces. Les fréquences de ces pics sont aux harmoniques cyclotroniques de l'ion majoritaire (deuterium) au bord extérieur du plasma (grand rayon 4. 0m), près de la dernière surface fermée. Ceci représente un paradoxe majeur parce que l'ice est fortement corrélée
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49

Bonifacio, Henry F. "Estimating particulate emission rates from large beef cattle feedlots." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/15530.

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Doctor of Philosophy<br>Department of Biological and Agricultural Engineering<br>Ronaldo G. Maghirang<br>Emission of particulate matter (PM) and various gases from open-lot beef cattle feedlots is becoming a concern because of the adverse effects on human health and the environment; however, scientific information on feedlot emissions is limited. This research was conducted to estimate emission rates of PM[subscript]10 from large cattle feedlots. Specific objectives were to: (1) determine feedlot PM[subscript]10 emission rates by reverse dispersion modeling using AERMOD; (2) compare AERMOD and
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50

Bezuidenhout, Jacques. "Pre-equilibrium helion emission induced by protons." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019.1/1307.

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