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Dissertations / Theses on the topic 'Emission activity'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Dicken, Volker. "Simultaneous activity and attenuation reconstruction in emission tomography." Universität Potsdam, 1998. http://opus.kobv.de/ubp/volltexte/2007/1474/.

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In single photon emission computed tomography (SPECT) one is interested in reconstructing the activity distribution f of some radiopharmaceutical. The data gathered suffer from attenuation due to the tissue density µ. Each imaged slice incorporates noisy sample values of the nonlinear attenuated Radon transform (formular at this place in the original abstract) Traditional theory for SPECT reconstruction treats µ as a known parameter. In practical applications, however, µ is not known, but either crudely estimated, determined in costly additional measurements or plainly neglected. We demonstrat

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2

Wan, Abu Bakar Wan Azelee. "Non-noble metal environmental catalysts : synthesis, characterisation and catalytic activity." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262524.

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3

Zic, Andrew John. "Cool Stellar Activity at Low Radio Frequencies." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/24500.

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Stellar magnetic fields drive a wide range of energetic phenomena, which have a crucial influence on their properties, evolution, and environment. In this thesis, we investigate the low-frequency radio emission from active low-mass stars. We harness this emission to constrain magnetospheric properties and processes arising from different magnetic activity paradigms. In Chapter 2, we present low-frequency observations of a sample of ultra-cool dwarfs. We show that while most ultra-cool dwarfs do not produce low-frequency emission, their magnetospheric properties can be constrained with measurem

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4

Суганяка, М. В. "Проблеми емісійної діяльності банків України". Thesis, Українська академія банківської справи Національного банку України, 2005. http://essuir.sumdu.edu.ua/handle/123456789/62497.

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Специфіка українського ринку цінних паперів полягає в тому, що на ньому домінують банки, які виступають основними андеррайтерами, інвесторами і до того ж випускають власні цінні папери як емітенти. Небанківські фінансові установи через їхню слабість не грають помітної ролі на ринку цінних паперів. Цим ми відрізняємося від країн, де саме великі інституціональні інвестори (страхові компанії, пенсійні і взаємні інвестиційні фонди) є основними гравцями на ринку цінних паперів.

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5

Edwards, Louise. "Line Emission in Brightest Cluster Galaxies: The Nature of Recent Activity." Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/25021/25021.pdf.

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6

Edwards, Louise O. V. "Line emission in Brightest Cluster Galaxies : the nature of recent activity." Doctoral thesis, Université Laval, 2007. http://hdl.handle.net/20.500.11794/19437.

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7

Lundquist, Pinelopi. "Imaging and Quantification of Brain Serotonergic Activity using PET." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Universitetsbiblioteket [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6830.

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8

Bhatt, Ruchir N. "Positron Emission Tomography (PET) Tumor Segmentation and Quantification: Development of New Algorithms." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/798.

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Tumor functional volume (FV) and its mean activity concentration (mAC) are the quantities derived from positron emission tomography (PET). These quantities are used for estimating radiation dose for a therapy, evaluating the progression of a disease and also use it as a prognostic indicator for predicting outcome. PET images have low resolution, high noise and affected by partial volume effect (PVE). Manually segmenting each tumor is very cumbersome and very hard to reproduce. To solve the above problem I developed an algorithm, called iterative deconvolution thresholding segmentation (IDTS) a

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9

Morey, Jennifer Eileen. "Refining PM₁₀ emission inventories in California : new methods for estimating vehicle activity on unpaved roads /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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10

Feltre, Anna. "Multi-band Emission of Active Galactic Nuclei: the Relationship of Stellar and Gravitational-Accretion Activity." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3423457.

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One of the remaining open issues in the context of the analysis of active galactic nuclei is the evidence that nuclear gravitational accretion is often accompanied by a concurrent starburst activity. What is, in this picture, the role played by the obscuring dust around the nucleus and what does the state of the art models have to say? Can the infrared data provided by Spitzer and Herschel help us in extensively investigate both phenomena and, if so, how and with what limitations? Does the presence of an active nucleus have an impact in the mid- and far-infrared properties of galaxies? Which a

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11

BELLANI, GIACOMO. "Imaging of lung metabolic activity by means of positron emission tomography during acute lung injury." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2010. http://hdl.handle.net/10281/7887.

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Neutrophilic inflammation plays a key role in the pathogenesis of acute respiratory distress syndrome (ARDS) and acute lung injury (ALI). Positron emission tomography (PET) with [F]-fluoro-2-deoxy-D-glucose (FDG) can be used to image cellular metabolism that, during lung inflammatory processes, likely reflects neutrophils activity. The aim of this study was to assess the magnitude and regional distribution of inflammatory metabolic activity in the lungs of patients with ALI/ARDS by PET with FDG. Fifteen patients with ALI/ARDS were enrolled, while four spontaneously breathing and two mechanical

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12

Moreau, Steven. "Characterizing Rho Kinase Activity Using a Novel PET Tracer in Hypertrophied Cardiomyocytes." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22887.

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Cardiac hypertrophy is a compensatory response to increased work load or stress on the heart, but over time can lead to heart failure and death. The molecular mechanisms underlying this disease are still not completely understood, however the Rho/Rho kinase pathway has been shown to play a role. N-[11C]-methyl-hydroxyfasudil, a PET radiotracer, binds to active Rho kinase and could be a possible tracer for hypertrophy. Hypertrophy was induced in vitro using the β-adrenergic receptor agonist isoproterenol to evaluate optimal Rho kinase activity. Rho kinase activity data was correlated to N-[11C]

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13

In, Yongkyoon 1968. "Analysis of magnetohydrodynamic (MHD) activity using electron cyclotron emission (ECE) diagnostics on Alcator C-Mod tokamak." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/8839.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2000.<br>Includes bibliographical references (p. 175-181).<br>Magnetohydrodynamic (MHD) activity has been analyzed primarily using electron cyclotron emission (ECE) diagnostics on Alcator C-Mod tokamak. The main results are that i) two MHD instabilities have been identified during current ramp-up discharges (resistive 'multiple' tearing mode and ideal interchange mode) and ii) a new approach to diagnose edge localized modes (ELMs) using ECE diagnostics was explored. Both MHD modes were accompanied by hollow pr

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14

Fujiki, Nobuya. "Influence of speech-coding strategy on cortical activity in cochlear implant users : a positron emission tomographic study." Kyoto University, 1999. http://hdl.handle.net/2433/182287.

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15

Andersson, Louise. "Psychedelic agents : Changes induced in subjective experience and brain activity." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-17308.

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This thesis combines phenomenological and neuroscientific research to elucidate the effects of psychedelic agents on the human brain, mind and psychological well-being. Psychoactive plants have been used for thousands of years for ceremonial and ritual purposes. Psychedelics are psychoactive substances that affect cognitive processes and alter perception, thoughts, and mood. Illegalization of psychedelics in the 1960s rendered them impossible to study empirically but in the last couple of decades, relaxed legal restrictions regarding research purposes, renewed interest in the effects of psyche

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16

Shibata, Sumiya. "Magnetoencephalography with temporal spread imaging to visualize propagation of epileptic activity." Kyoto University, 2017. http://hdl.handle.net/2433/226764.

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17

Durai, Madhu. "Accuracy of activity quantitation of F-18 fluorodeoxyglucose (FDG) Positron Emission Tomography (PET) imaging using simulated malignant tumors." FIU Digital Commons, 2003. http://digitalcommons.fiu.edu/etd/3102.

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This thesis involves a procedure, which calculated and compared the sum of all the pixel counts, threshold pixel counts sum of a 3D PET image and mean and maximum pixel count of one single transaxial slice (2D) of simulated tumors for a chosen region of interest (ROI). A calibration factor was multiplied by the sum of the pixel counts, threshold pixel counts sum of all the transaxial slices, and the mean, and maximum pixel counts of one single transaxial slice in an ROI to calculate for the activity of the tumor. This activity calculated was compared with the real activity values. The results

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18

Gad, El-Mawla Diaa. "Generation and propagation of longitudinal tube waves in late-type stellar atmospheres and the rotation-emission activity relation." [S.l. : s.n.], 2001. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9142806.

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19

Deutsch, Kerry Ann. "Behavior of the atomic oxygen 5577 Ångström emission intensity at mid-latitudes : a climatological view /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/6803.

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20

Lassi, U. (Ulla). "Deactivation Correlations of Pd/Rh Three-way Catalysts Designed for Euro IV Emission Limits:effect of Ageing Atmosphere, Temperature and Time." Doctoral thesis, University of Oulu, 2003. http://urn.fi/urn:isbn:9514269543.

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Abstract The aim of this thesis is the knowledge of the most relevant deactivation mechanisms of Pd/Rh three-way catalysts under different ageing conditions, the deactivation correlation of laboratory scale ageing and engine bench/vehicle ageings, and the evaluation of the deactivation correlation. In the literature review, the phenomena involved in the three-way catalyst operation and its deactivation are considered. In the experimental section, ageing-induced phenomena in the catalyst are studied and deactivation correlations between laboratory scale and engine bench/vehicle ageings are pres

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21

Yoon, Seungju. "A new heavy-duty vehicle visual classification and activity estimation method for regional mobile source emissions modeling." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-07122005-204032/.

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Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2006.<br>Michael O. Rodgers, Committee Chair ; Randall L. Guensler, Committee Member ; Michael D. Meyer, Committee Member ; Michael P. Hunter, Committee Member ; Jennifer H. Ogle, Committee Member.

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22

Й, Шевцова О., та К. О. Біла. "Емісійна діяльність банків як фактор активізації інвестиційного ринку". Thesis, Українська академія банківської справи Національного банку України, 2007. http://essuir.sumdu.edu.ua/handle/123456789/60874.

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23

Kadir, Ahmadul. "Functional brain activity in Alzheimer patients as studied by multi-tracer positron emission tomography : effects of treatment with cholinesterase inhibitors /." Stockholm : Karolinska institutet, 2007. http://diss.kib.ki.se/2007/978-91-7357-357-3/.

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24

Sun, Hongyan. "An investigation into the use of scattered photons to improve 2D Position Emission Tomography (PET) functional imaging quality." Hindawi Publishing Corporation, 2012. http://hdl.handle.net/1993/31031.

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Positron emission tomography (PET) is a powerful metabolic imaging modality, which is designed to detect two anti-parallel 511 keV photons origniating from a positron-electron annihilation. However, it is possible that one or both of the annihilation photons undergo a Compton scattering in the object. This is more serious for a scanner operated in 3D mode or with large patients, where the scatter fraction can be as high as 40-60%. When one or both photons are scattered, the line of response (LOR) defined by connecting the two relevant detectors no longer passes through the annihilation positio

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25

Miles-Paez, Paulo A., Stanimir A. Metchev, Aren Heinze, and Daniel Apai. "Weather on Other Worlds. IV. H alpha Emission and Photometric Variability Are Not Correlated in L0-T8 Dwarfs." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/624337.

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Recent photometric studies have revealed that surface spots that produce flux variations are present on virtually all L and T dwarfs. Their likely magnetic or dusty nature has been a much-debated problem, the resolution to which has been hindered by paucity of diagnostic multi-wavelength observations. To test for a correlation between magnetic activity and photometric variability, we searched for Ha emission among eight L3-T2 ultra-cool dwarfs with extensive previous photometric monitoring, some of which are known to be variable at 3.6 mu m or 4.5 mu m. We detected Ha only in the non-variable

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26

Persson, Jonas. "Brain activity associated with episodic memory : similarities and differences between encoding and retrieval." Doctoral thesis, Umeå universitet, Institutionen för psykologi, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-141602.

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Understanding the mnemonic functions of the brain has been extensively facilitated by the development of functional neuroimaging techniques such as positron emission tomography (PET) and functional magnetic resonance imaging (fMRI). The present thesis aims at investigating the neural mechanisms underlying memory for personally experienced events (episodic memory), using PET. In paper I, similarities between encoding and retrieval of enacted (motor) information were explored. We observed increased retrieval activation in right premotor areas in the brain when sentences encoded by motor enactmen

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27

André, Philippe. "Emission radio des etoiles pre-sequence principale du nuage rho ophiuchi : observations et interpretations." Paris 6, 1987. http://www.theses.fr/1987PA066240.

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L'observation radiointerferometrique du nuage moleculaire rho ophiuchi a permis de detecter une dizaine de sources stellaires emettant dans le domaine radio parmi la centaine d'etoiles jeunes de ce nuage. La nature de cette emission est magnetique et produite par effet gyrosynchrotron. Des eruptions magnetiques importantes provoquent la polarisation circulaire de l'emission de l'un des objets detectes et la variabilite de l'emission de deux autres etoiles. Plus generalement, ces observations semblent selectionner une population specifique d'etoiles tres jeunes, en presence d'un champ magnetiqu

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28

Roberts, Craig Arnold. "Modeling the relationships between microscopic and macroscopic travel activity on freeways : bridging the gap between current travel demand models and emerging mobile emission models." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/32873.

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29

Gad, El-Mawla Diaa [Verfasser], and Peter [Akademischer Betreuer] Ulmschneider. "Generation and propagation of longitudinal tube waves in late-type stellar atmospheres and the rotation-emission activity relation / Diaa Gad El-Mawla ; Betreuer: Peter Ulmschneider." Heidelberg : Universitätsbibliothek Heidelberg, 2001. http://d-nb.info/1177830531/34.

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30

Lestand, Loïc. "Etude de la mesure en ligne de l'activité β+ induite lors des traitements d'hadronthérapie, en vue de leur contrôle balistique". Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00785229.

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Le cancer est aujourd'hui la première cause de mortalité en France, devant les pathologies cardio-vasculaires, si bien qu'il constitue un enjeu de santé publique majeur. Parmi les alternatives thérapeutiques actuellement pratiquées en milieu clinique, on compte l'ensemble des techniques de radiothérapie externe. L'hadronthérapie est une technique émergente de radiothérapie, caractérisée par des propriétés balistiques et biologiques compatibles avec la définition de protocoles cliniques et thérapeutiques hautement conformationnels. La précision balistique, c'est à dire la capacité à irradier un

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31

Rozes, Arnaud. "Construction et premières caractérisations d'un détecteur dédié à la mesure de l'activité β + induite lors des traitements d'hadronthérapie, en vue de leur contrôle balistique". Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22725/document.

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L’hadronthérapie est une technique de traitement des cancers basée sur l’utilisation de faisceaux d’ions (principalement des protons et des ions 12 C). L’intérêt des ions repose sur deux propriétés fondamentales. La première est d’ordre balistique. Le mode d’interaction des ions avec la matière, caractérisé par le phénomène de pic de Bragg, se traduit par une faible dispersion spatiale de l’énergie déposée dans les tissus. Ceci permet un très bon niveau de conformation au volume tumoral. La seconde est d’ordre biologique, notamment pour les ions 12 C qui présentent une cytotoxicité élevée, uti

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32

Chengxi, Liu. "Understanding the Impacts of Weather and Climate Change on Travel Behaviour." Doctoral thesis, KTH, Transportplanering, ekonomi och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-187019.

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Human behaviour produces massive greenhouse gas emissions, which trigger climate change and more unpredictable weather conditions. The fluctuation of daily weather corresponds to variations of everyday travel behaviour. This influence, although is less noticeable, can have a strong impact on the transport system. Specifically, the climate in Sweden is becoming warmer in the recent 10 years. However, it is largely unknown to what extent the change of travel behaviour would respond to the changing weather. Understanding these issues would help analysts and policy makers incorporate local weather

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33

Baillet, Marion. "Les modifications du sommeil et du cycle veille/sommeil au cours du vieillissement : approche par actimétrie et imagerie cérébrale." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0950/document.

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Les altérations du sommeil et du cycle veille/sommeil au cours du vieillissement constituent des facteurs de risque de l’apparition d’un déclin cognitif et de l’évolution vers une démence. Pour autant, le lien entre ces altérations et les modifications cérébrales liées à l’âge reste encore peu connu. L’objectif de cette thèse a été de déterminer si les modifications du sommeil et du cycle veille/sommeil constituaient un marqueur de fragilité cérébrale pouvant être associé à l'apparition de troubles cognitifs chez des personnes âgées de la population AMImage. Nous avons d’abord montré que le dé

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34

Gagnon, Melanie Line. "Mutagenicity and dioxin-like activity of biodiesel emissions." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27980.

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Diesel emissions have been shown to elicit a variety of toxicological effects, and alternative fuels (i.e., biodiesel) are currently being assessed to determine their ability to reduce the risks of adverse health effects. Exhaust emissions were generated using ULSD and biodiesel blended fuels and extracts of diesel PM (i.e., filters and PUFs) were separated into polar aromatic and non-polar neutral compounds. Mutagenic activity was assessed using the Salmonella mutagenicity assay, and Ah-receptor agonism was assessed using the DRCALUX assay. Results indicate that organic extracts of diesel/bio

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Andres, Delgado Lidia. "Greenhouse gas emissions and energy intensity of the transport sector." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/665197.

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Esta tesis analiza el tema del transporte y la presión medioambiental a través de tres variables relacionadas: las emisiones, la actividad y la intensidad energética del transporte. El Capítulo 2 analiza la importancia de la población, la actividad económica, el volumen de transporte y las características estructurales de la actividad de transporte —intensidad energética del transporte, participación de los diferentes modos de transporte y participación de las diferentes fuentes energéticas— como factores explicativos de las emisiones de GEI de la actividad de transporte en la Unión Europea-28

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Petraki, Ermioni. "Electromagnetic radiation and Radon-222 gas emissions as precursors of seismic activity." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12872.

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Earthquakes are amongst the most destructive of natural phenomena and have been the subject of significant research effort over many decades, to predict the onset of seismic events. Electromagnetic emissions detected prior to earthquakes provide a potential data source for seismic predictions and research suggests that specific pre-seismic electromagnetic activity can be directly related to specific earthquakes although it is still an open issue as to the precise links between these electromagnetic emissions and subsequent earthquakes. In this research, findings of the long memory or the self-

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Caldwell, Amanda. "Assessment of Transportation Emissions for Ferrous Scrap Exports from the United States: Activity-Based Maritime Emissions Model and Theoretical Inland Transportation Model." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc103296/.

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Industrial ecology is a field of study that encourages the use of closed-loop material cycles to achieve sustainability. Loop closing requires the movement of materials over space, and has long been practiced in the iron and steel industry. Iron and steel (ferrous) scrap generated in the U.S. is increasingly exported to countries in Asia, lengthening the transportation distance associated with closing the loop on the iron and steel life cycle. In order to understand the environmental cost of transporting this commodity, an activity-based maritime transportation model and a theoretical in-la

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Barnett, Ryan A. "Characterization of infield vehicle activity data and exhaust emissions from diesel powered off-road vehicles." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2094.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains xv, 164 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 154-156).

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Krupař, Vratislav. "Stereoscopic Observations of Solar Radio Emissions by the S/Waves Instrument onboard the STEREO Spacecraft." Observatoire de Paris, 2012. https://hal.science/tel-02095132.

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Cette thèse est principalement consacrée à une étude des sursauts radio type III observés par l'instrument S/Waves à bord du satellite Solar TErrestrial RElations Observatory (STEREO). Ces émissions sont produites lors de période d'activité solaire accrue par des faisceaux d'électrons suprathermiques s'échappant de la couronne solaire le long de lignes de champ magnétique ouvertes. Lorsque des électrons rapides se propagent dans le milieu interplanétaire (IP), des ondes de Langmuir sont générées à la fréquence plasma locale des électrons fpe par une instabilité dite "bump-on-tail". Ces instabi

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Brand, Christian. "Personal transport and climate change : exploring climate change emissions from personal travel activity of individuals and households." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439714.

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ANZANO, MANUELA NADIA. "Research and development of new products and processes: reclamation of a manufacturing waste." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2010. http://hdl.handle.net/10281/14127.

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The aim of the research was the development of new products and processes from a manufacturing waste. The manufacturing waste were produced by a metallurgic Italian company which produced thin silver metallic films. These films were used as coating and food decoration. Thin films were produced by an hammering process. The starting material, silver laminate, had a thickness of 10 μm. During the hammering process films with various thickness were obtained. The final produced silver films had a thickness of about 300 nm which can be considered a submicrometric dimension, near to the nanometri

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Harvey, Rebecca. "The Role of Green Leafy Plants in Atmospheric Chemistry: Volatile Emissions and Secondary Organic Aerosol." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/556.

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Aerosols play important roles in atmospheric and environmental processes. Not only do they impact human health, they also affect visibility and climate. Despite recent advances made to under their sources and fate, there remains a limited understanding of the mechanisms that lead to the formation of aerosols and their ultimate fate in the atmosphere. These knowledge gaps provide the crux of the research reported herein, which has focused on identifying novel sources of atmospheric aerosol, characterizing its physical and optical properties, and rationalizing these properties using an in-depth

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MOREIRA, DENISE S. "Medida absoluta da taxa de desintegracao e da probabilidade de emissao gama do sup[42]K." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10810.

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Made available in DSpace on 2014-10-09T12:44:15Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:57:24Z (GMT). No. of bitstreams: 1 06884.pdf: 3958157 bytes, checksum: d230858464baf1ab2ee2867cf97407e4 (MD5)<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Walsh, Lucy. "Implications for Volcanic Hazards in the Central and Southern Cascades Based on Gas Emissions During Explosive Cinder Cone Activity." Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/12977.

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Volatile emissions from Cascades cinder cone eruptions have been well-documented; however the implications for understanding the effects that volcanic gases have on surrounding communities have not been addressed. This study examines the hazards from volatile degassing during explosive activity by (1) analyzing S, Cl, and F concentrations dissolved in olivine-hosted melt inclusions and matrix glass from cinder cones located in central Oregon and northern California, (2) estimating the mass of volcanic gas degassed during these eruptions, and (3) predicting gas concentrations downwind of the v

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Salas, Matamoros Carolina. "Radio and X-ray studies of Coronal Mass Ejections and their relevance for Space Weather." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEO016/document.

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La couronne solaire est un milieu très dynamique : instabilités du champ magnétique, qui structure le plasma, conduit à l'accélération et le chauffage des particules chargées et à l'éjection de grandes structures dans l'héliosphère, les émissions de masse coronale (CME, selon ces sigles en anglais). Ces structures magnétiques éjectées peuvent interagir avec le champ magnétique de la Terre et affecter le plasma de l'environnement. Ces structures conduisent également à l'induction des courants électriques dans le sol à des latitudes élevées. L'étude de l'origine et de la propagation de ces émiss

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Tadepally, Harika. "Spatiotemporal Variation of Continuous PM2.5 In Cincinnati: Analyzing The Impacts of Local-Scale Emissions Versus Meteorological Variability." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504802386325803.

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Lübcke, Peter [Verfasser], and Ulrich [Akademischer Betreuer] Platt. "Optical remote sensing measurements of bromine and sulphur emissions: Investigating their potential as tracers of volcanic activity / Peter Lübcke ; Betreuer: Ulrich Platt." Heidelberg : Universitätsbibliothek Heidelberg, 2014. http://d-nb.info/1180031458/34.

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Bombrun, Maxime. "Characterisation of volcanic emissions through thermal vision." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22600/document.

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En avril 2010, l’éruption de l’Eyjafjallajökull (Islande) a projeté des cendres sur toute l’Europe pendant six jours, causant d’importantes perturbations aériennes. Cette crise a soulevé la nécessité de mieux comprendre la dynamique des panaches lors de l’émission, de la dispersion, et de la retombée afin d’améliorer les modèles de suivis et de prédiction de ces phénomènes. Cette éruption a été classée comme Strombolienne. Ce type d’éruption offre un large panel de manifestations (coulée de lave, paroxysmes) et peut être utilisé comme indicateur d’éruptions plus dangereuses. Les éruptions stro

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Okiobe, Simon Thierry [Verfasser]. "Potential effects of arbuscular mycorrhiza fungi on denitrification potential activity and nitrous oxide (N2O) emissions from a fertile agricultural soil. / Simon Thierry Okiobe." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1205317724/34.

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Fares, Rim. "Magnétisme, activité et interactions magnétosphériques dans les systèmes étoile - planète géante proche." Phd thesis, Université Paul Sabatier - Toulouse III, 2011. http://tel.archives-ouvertes.fr/tel-00600939.

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Les planètes extrasolaires en orbite proche (Jupiter chauds ou Pégasides) sont soumises à de fortes interactions avec leur étoile: rayonnement, effets gravitationnels, flot de particules, champ magnétique. La planète, baignée dans le champ magnétique de son étoile tout au long de son orbite, peut déclencher des réactions en retour sur son étoile, qui se manifesteraient par exemple par une activité photosphérique induite ou une influence sur le champ magnétique stellaire par interactions de marée. Au cours de cette thèse, le suivi en spectropolarimétrie d'un échantillon d'étoiles hôtes de Jupit

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