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1
Correa, Mauricio. "Um estudo comparativo do comportamento das afiações conica e conica radial (racon) em brocas helicoidais de aço rapido." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264210.
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Orientador: Olivio Novaski<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-07-21T14:28:26Z (GMT). No. of bitstreams: 1
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Previous issue date: 1996<br>Resumo: O objetivo principal deste trabalho é estudar o comportamento das afiações Racon (cônica radial) e Cônica em brocas helicoidais de aço rápido e analisar a performance das mesmas, buscando correlacioná-Ias às suas características geométricas. Para esta finalidade, realizou-se ensaios com dois materiais de diferentes usinabilidade, o aço SAE 4340 e o aço SAE 1045 utilizando-se três diferentes velocidades de corte associadas a um avanço específico para cada material. Testaram-se as afiações, repetindo-se as condições de corte três vezes para cada ponto ensaiado, evitando-se dessa maneira, influências aleatórias inerentes aos ensaios e aumentando-se quantitativa e qualitativamente as amostragens obtidas. Através desses experimentos, monitorou-se o percurso de usinagem, os esforços de corte (momento torçor e força de avanço), a evolução do desgaste de flanco e o alargamento dos furos usinados. Com os resultados obtidos levantaram-se hipóteses para explicar o comportamento de vida da ferramenta e esforços de corte (momento torçor e força de avanço). Constatou-se a superioridade da afiação Racon em vida de ferramenta, quando aplicada ao aço SAE 4340 e vida equivalente à Cônica, quando aplicada ao aço SAE 1045. Já, os esforços de corte observados (momento torçor e força de avanço) para afiação Racon mostraram-se inferiores aos da afiação Cônica, para praticamente todos os casos à exceção da força de avanço para a terceira condição de usinagem no aço SAE 1045. A partir dessas considerações presume-se que o comportamento da afiação Racon tende a ser semelhante em performance em outras condições de usinagem para os materiais ensaiados e possivelmente também para outros materiais demonstrando sua evolução frente à afiação Cônica<br>Abstract: The main goal of this work is to study the behaving of Racon (radiused conventional point) and Conical (conventional) drill points in high speed stell twist drills and analyse their performance, trying to correlate them to their geometrical features. For this purpose, tests with two different machinability materiais, the SAE 4340 and SAE 1045 steeIs, were carried out by using three different cutting speeds associated to an specific feed for each material. The drill points were tested by repeating three times the cutting condictions to each point, avoiding the random influences inherent to them and increasing the obteined samples both in quality and quantity. Cutting length, cutting forces (torque and thrust force), flank wear evolution and widening of the machined holes were supervised through out these tests. Hipoteses to explain toollife behaving and cutting forces (torque and thrust force) were generated with the obtained results. It was verified the superiority of Racon drill point in tool life when the SAE 4340 stell was used. But cutting forces in Racon drill point were inferior when compared to the conventional one in almost all cases, except the thrust force to the third cutting condiction in SAE 1045 steel. Through all these considerations it's presumed that Racon drill point behaving tends to be similar in performance in other cutting condictions in the tested materiaIs and possibly in other materiaIs showing its evolution over the conventional drill point<br>Mestrado<br>Engenharia de Fabricação<br>Mestre em Engenharia Mecânica
2
Willenius, Ann-Christin. "Radon i flerbostadshus : Kartläggning av fastighetsförvaltarnas egenkontroll avseende radon." Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-9955.
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<p>Radon is a hazardous substance that cannot be perceived by our senses. It has long been known that exposure to high radon levels for a long period of time will ultimately cause lung cancer. The Swedish Radiation Safety Authority estimates that 500 people die annually due to this. Although most of them are smokers, even non-smokers suffer from lung cancer caused by radon. The statutory value for radon in homes today is 200 Bq/m³. Several years of research points to the fact that 63% of all those who develop lung cancer have been exposed to radon levels between 100-200 Bq/m³. This is why the WHO has lowered the recommended value to 100 Bq/m³, and The Radiation Safety Authority of Sweden also has the same recommendation today. This study has been rendered to the Municipality of Eskilstuna, and its environmental and emergency management. The study has identified 72 % of the rental properties for radon measurements and action through personal visits to 14 large and medium-sized property managers in Eskilstuna. Several conclusions can be made from the study. Generally, very few measurements have been made and these have shown 6 % of high radon levels. The various property managers are at very different levels regarding their work with radon and there are very big differences amongst them as regards giving priority to the issue with radon. In 2020, the Swedish parliament has decided that no one should be exposed to radon levels above 200 Bq/m³ in their homes. Today there is legislation that applies against radon in apartment buildings as well as effective methods to reduce radon levels. However, the problem is instead the fact that there is a lack of resources at hand for the public health inspectors. Consequently, it seems rather impossible achieving the goal set for 2020. Thus it is of utmost interest to highlight this problem for the politicians that ultimately set the budget for the services in the municipality.</p>
3
Golightly, John. "Characterization of a carbon radon filter and Radon detection." Thesis, Kingston, Ont. : [s.n.], 2008. http://hdl.handle.net/1974/1397.
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Jia, Di, and 賈地. "A radon chamber and its role in a radon survey." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31210818.
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Jia, Di. "A radon chamber and its role in a radon survey /." [Hong Kong : University of Hong Kong], 1992. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13385379.
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Pinto, Junior Dorival Leão. "Espaços de Radon." [s.n.], 1999. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260978.
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Orientadores: Marcelo Dutra Fragoso, João Bosco Ribeiro do Val<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-07-25T22:55:58Z (GMT). No. of bitstreams: 1
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Previous issue date: 1999<br>Resumo: Assumindo apenas hipóteses sobre o espaço amostral 'ômega¿ e a 'sigma¿-álgebra F associada, vamos caracterizar a classe mais geral de espaços mensuráveis ('ômega¿, F), tal que para toda probabilidade P sobre ('ômega¿, F),o espaço de probabilidade ('ômega¿, F, P): a. Admite Probabilidade Condicional Regular; b. é Compacto no sentido de Marczewski (1954); c. é Perfeito no sentido de Gnedenko e Kolmogorov (1949); d. é Lebesgue no sentido de Rohlin (1949); entre outras equivalências apresentadas nesta tese... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital<br>Abstract: Assuming hypothesis only on the measurable space ('ômega¿, F) we characterize the most general class of measurable spaces, that for all probability P on ('ômega¿, F), the probability space ('ômega¿, F, P): a. admits regular conditional probability; b. is compact in the Marczewski (1954) sense; c. is perfect in the Gnedenko and Kolmogorov (1949) sense; d. is Lebesgue in the Rohlin (1949) sense; among others equvialences established in this thesis... Note: The complete abstract is available with the full electronic digital thesis or dissertations<br>Doutorado<br>Doutor em Engenharia Elétrica
7
Carrot, Laurent. "Rayon [rhô]-numérique." Lyon 1, 2003. http://www.theses.fr/2003LYO10190.
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Dans un premier temps, on s'intéressera aux propriétés du rayon [rhô] -numérique dans les espaces de Hilbert, notion initialement introduite par Sz. -Nagy et Foias à l'aide de la [rhô]-dilatation unitaire. Puis, l'étude du shift tronqué sur l(2n) permettra d'évaluer la constante dans une inégalité de Von Neumann avec contraintes, donnée par Badea et Cassier. Ensuite, à l'aide d'une condition sur la croissance de la résolvante, nous étendrons cette notion aux espaces de Banach. L'usage de la résolvante pour les définir assurera des classes C(p)"solides", qui conserveront de nombreuses propriétés. De plus, elles permettront de passer continuement de la classe des contractions à celle des opérateurs de rayon spectral inférieur à 1. Ces classes seront donc très riches, et elles pourraient fournir une alternative à la notion de [rhô]-dilatation unitaire pour les espaces de Banach. Enfin, nous étudierons des classes particulières d'opérateurs, dont notamment les shifts à poids sur l(1) et les nilpotents.
8
Mvelase, Mashinga Johannes. "Radon escape from water." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3869_1307688700.
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<p>This thesis aims to measure the rate of radon loss from water in a systematic way. The dependence on surface area, temperature and concentration will be investigated. The experiments were done at UWC by creating radon using radium sources and then measuring the radon concentrations inside a vacuum chamber to obtain the speed of radon escape from the water. The results are compared to a model [Cal 2002] where the radon concentration in the air and hence the transfer rate is measured using a RAD7 radon detector. Since the equations cannot be solved analytically, a numerical solution is employed. The radon transfer velocity coefficient is found to be (1.9±<br>0.5)×<br>10-6m/s. This value indicates that the escape of radon should not be a problem when a sample is open to the air for a minute or two.</p>
9
Gaskin, Janet. "Radon and Lung Cancer." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39003.
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Background: Lung cancer was the fifth leading cause of mortality globally in 2010, and the leading cause of cancer mortality in Canada, representing 26% of all cancer deaths for both men and women in 2017. Radon is a very modifiable environmental exposure that is the second most important cause of lung cancer.
Objectives: The objectives of this thesis are to quantify the lung cancer burden associated with residential radon and to identify the most cost effective mitigation options to reduce residential radon in Canada.
Methods: The global burden of lung cancer mortality attributable to radon in 2012 was estimated from the 66 countries for which a representative national radon survey was available, using several different models for excess relative risk (ERR) of lung cancer from radon studies. Cost-utility analyses are conducted for 20 practical radon interventions scenarios to reduce residential radon exposures in new and existing housing in Canada, each province/territory and 17 census metropolitan areas. A societal perspective and a lifetime horizon are adopted. A Markov cohort model and a discrete event simulation are used to model residents by household, based on a period-life table analysis, at a discount rate of 1.5%.
Results: The estimates of the global median PAR were consistent, ranging from 16.5% to 13.6% for the three ERR models based on miners, and the mean estimates of PAR for Canada ranged from 16.3% to 14.6%. It is very cost effective to install radon preventive measures in new construction compared to no radon control in all regions across Canada. At a radon mitigation threshold of 100 Bq/m3, the sequential analysis recommends the combination of the activation of preventive measures in new housing with the mitigation of existing housing at current testing and mitigation rates for cost effectiveness thresholds between 51,889 and 92,072 $/QALY for Canada, between 27,558 and 85,965 $/QALY for Manitoba, and between 15,801 and 36,547 $/QALY for the Yukon. The discounted ICER for screening and mitigation of existing housing at current rates relative to no radon control measures is 62,451 (66,421) $/QALY using a Markov cohort model (discrete event simulation model) for mitigation of housing above a threshold of 200 Bq/m3, and is 58,866 (59,556) $/QALY using a Markov cohort model (discrete event simulation model) for mitigation of housing above a threshold of 100 Bq/m3.
Conclusions: Cost effective residential radon interventions should be implemented across Canada to reduce exposures to this very modifiable cause of lung cancer and to help reduce the increasing lung cancer burden in an ageing Canadian population.
10
Dabrowski, Damian. "Rectifiability of Radon measures." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/672535.
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Aquesta tesi es dedica a l’estudi de mesures rectificables, de rectificabilitat quantitativa i, en menor grau, del límit dels operadors integrals singulars definits respecte a mesures amb creixement polinòmic.<br>Esta tesis está dedicada al estudio de medidas rectificables, rectificabilidad cuantitativa y, en menor grado, la acotación de operadores integrales singulares definidos respecto a medidas con crecimiento polinomial.<br>This thesis is dedicated to the study of rectifiable measures, quantitative rectifiability, and to a lesser degree, the boundedness of singular integral operators defined with respect to measures with polynomial growth.<br>Universitat Autònoma de Barcelona. Programa de Doctorat en Matemàtiques
11
Hung, Ling-chun. "The radioisotope unit radon analysis laboratory and its application to radon mitigation studies /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20897480.
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Hyland, Robert Quentin Thomas. "Spatial and temporal variations of radon and radon daughter concentrations within limestone caves." Thesis, University of Huddersfield, 1995. http://eprints.hud.ac.uk/id/eprint/4839/.
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This thesis outlines results from an investigation of radon and radon daughter concentrations in limestone caves, from a geographical and geological perspective Investigations were conducted at all geographical scales, ranging from a national investigation in the four major caving regions of England and Wales to a detailed survey within a single cave in the Peak District. The measured radon concentrations in some limestone caves in England and Wales are amongst the highest ever recorded in the world Significant spatial and temporal variations were recorded m concentrations at all scales, within a single cave, between caves in the same region and between different regions Additionally, seasonal and diurnal variations in concentrations were highlighted. External climatic variables and the cave radon budget were demonstrated to account for variations in cave radon concentrations Within limestone caves seven primary sources of radon were identified and the relative importance of each to the overall radon budget was determined Sediments and the contaming limestone rock were the major sources although in certain cases water and the soil were demonstrated to be influential Models were developed to predict cave radon concentrations within a single cave However, these could not be transposed to predict radon concentrations in other caves in the same region or other regions The users of limestone caves were identified, their potential exposure times were examined and legislation concerning their exposure was discussed Four groups were identified as being at risk from radon while underground, and three groups were identified as bemg at little risk Methods by which the risk from radon exposure can be reduced were examined
13
Guiseppe, Vincente E. "Radon in Ground Water: A Study of the Measurement and Release of Waterborne Radon and Modeling of Radon Variation in Bedrock Wells." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/GuiseppeVE2006.pdf.
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Hill, Janet Mary. "Radon and its daughters in the Hong Kong environment." Thesis, [Hong Kong : University of Hong Kong], 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12273557.
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Mestanza, Muñoz Segundo Nilo. "Influência da ventilação na distribuição espacial do Rn-222 e seus produtos de decaimento em ambientes de convívio humano." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278104.
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Orientador: Julio Cesar Hadler Neto<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-07-23T10:31:20Z (GMT). No. of bitstreams: 1
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Previous issue date: 1996<br>Resumo: Para determinar a influência da ventilação (fluxo direcionado de ar produzido por um ventilador) sobre a distribuição espacial do Rn-222 e seus produtos de decaimento (filhos) presentes em ambientes de convívio humano, obteve-se um conjunto de resultados experimentais, por meio da técnica de traços nucleares deixados por partículas alfa sobre detectores plásticos adequados (CR-39).
A exposição destes detectores foi realizada num ambiente fechado, considerando a influência da ventilação para diferentes ângulos, velocidades e distâncias do ventilador. Nesta presente pesquisa, os resultados mostram que uma quantidade relativa de filhos do Rn-222 são retirados do ambiente pelos efeitos de ventilação e plateout. Apresentamos também estudos preliminares dos efeitos de borda nos detectores (CR-39), assim como a dependência da densidade dos traços como função da seção transversal do detector. Apresenta-se resultados de calibração do tempo de ataque químico em função do diâmetro dos traços. Fez-se também um modelo analítico que explica este fenômeno e que nos ajuda a compreender nossos resultados experimentais<br>Abstract: Not informed.<br>Mestrado<br>Física<br>Mestre em Física
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Yamazawa, H., M. Matsuda, J. Moriizumi, and T. lida. "Wet Deposition of Radon Decay Products and its Relation with Long-Range Transported Radon." American Institite of Physics, 2008. http://hdl.handle.net/2237/12042.
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Hazin, Clovis Abrahao. "Release of radon from showers and its influence on the balance of radon indoors." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/16638.
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Nemangwele, Fhulufhelo. "Radon in the Cango Caves." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&.
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Radon is a naturally occurring radioactive element in the 238U decay series that is found in high concentrations in certain geological formations such as Caves. Exposure to high concentrations of radon has been positively linked to the incidence<br />
of lung cancer. This study used Electret ion chambers and the RAD7 continuous radon monitor to measure radon concentrations in the Cango Caves in the Western Cape Province, South Africa. Measurements were taken during summer i.e. February 2004 and March 2005. The results for the radon activity concentrations range from the minimum of<br />
about 800 Bq.m-3 to a maximum of 2600 Bq.m-3. The two techniques give very similar results, though the Electret ion chamber results appear to be consistently higher by a few percent where measurements were taken at the same locations. A<br />
mathematical model has been developed to investigate the radon concentrations in the Cave. Diffusion and ventilation have been considered as mechanisms for explaining the distribution of radon concentrations. The ventilation rate in the Cave has been estimated under certain assumptions, and it is found to be about 7 ×<br>10&minus<br>6 s&minus<br>1 for the Van Zyl hall which is the first large chamber in the Cave. The radon concentration increases as one goes deeper into the Cave, but then becomes fairly constant for the deeper parts. The annual effective dose that the guides are exposed to in the Cave as a result of the radon concentrations, depends strongly on the time that they spend in the Cave and in which, halls they spend most of their time in the Cave. The initial results indicate an annual effective dose of 4-10 mSv, but this needs to be further investigated.
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Dickerson, Jill. "Curvelets and the Radon Transform." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5626.
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Computed Tomography (CT) is the standard in medical imaging field. In this study, we look at the curvelet transform in an attempt to use it as a basis for representing a function. In doing so, we seek a way to reconstruct a function from the Radon data that may produce clearer results. Using curvelet decomposition, any known function can be represented as a sum of curvelets with corresponding coefficients. It can be shown that these corresponding coefficients can be found using the Radon data, even if the function is unknown. The use of curvelets has the potential to solve partial or truncated Radon data problems. As a result, using a curvelet representation to invert radon data allows the chance of higher quality images to be produced. This paper examines this method of reconstruction for computed tomography (CT). A brief history of CT, an introduction to the theory behind the method, and implementation details will be provided.<br>M.S.<br>Masters<br>Mathematics<br>Sciences<br>Mathematical Science
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Aamold, Svein. "Ramon Iserns skulpturer : Svein Aamold." Oslo : Universitetsforl, 1998. http://catalogue.bnf.fr/ark:/12148/cb41074081v.
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Wentzel, Farrel Sidney. "Radon exhalation of building materials." University of the Western Cape, 2018. http://hdl.handle.net/11394/6787.
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>Magister Scientiae - MSc<br>Public concern about all radiation and radon exhalation from building
materials has been highlighted recently. The purpose of this study is
to address this public concern and to investigate the contribution of
building materials to indoor radon levels. As in soil and rocks, radon
gas is formed inside the building materials by decay of the parent
nuclide 226Ra. It is not possible to determine the radon exhalation rate
simply from the activity concentration of 226Ra, instead one must
measure radon exhalation rates directly from the surface of the
material. 222Rn has been identified as an important factor that could
result in a health hazard by studies all around the world.
The exhalation experiments were done at the UWC physics
department, in the Nuclear Physics Lab. A RAD7 radon detector was
used to measure the radon concentration in an air tight chamber that
contained various building material samples. The RAD7 records the
number of alpha particles with energy of 6.11 MeV which results from
the decay of 218Po, the daughter of 222Rn. The RAD7 detector converts
counts into Becquerel’s per cubic metre (Bq/m3). The building
materials tested were the raw materials used in construction such as
two different types of building sand, building stones, coarse
aggregate, floor and roof tiles, various granites from across the world
that were sourced locally and uranium bearing sandstone originating
from a Beaufort-West prospecting site. Stones from this site were
used as filler material in the construction of two farm houses. Most
building materials were found to have a very low rate of radon
exhalation. The only materials that had any significant radon
exhalation were 2 granite samples with a maximum exhalation rate of
1.5 Bq.m-2.h-1 and the uranium bearing sandstone. It is safe to say that
the overwhelming majority of building materials tested are safe to use
but some granites may require further study. The uranium bearing
sandstone is a definite radiation protection issue and should not be
used in any construction.
22
Lehmann, Catherine. "Le radon dans les habitations." Bordeaux 2, 1995. http://www.theses.fr/1995BOR2P072.
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Tuncer, Ertan, and Amir Mamali. "Radon lösningar vid nybyggnation avbostäder." Thesis, KTH, Byggteknik och design, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215312.
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Bostadsbehovet är väldigt stort i Stockholm. Landstingets prognos visar att vibehöver bygga ca 16,000 bostäder årligen för att täcka upp behoven.Radon som tränger in i våra bostäder är en stor hälsorisk då 500 personerdrabbas av lungcancer varje år till följd av höga radonhalter i bostaden.Detta tror vi kan minskas med rätta metoder.Syftet med denna rapport är att jämföra de olika tekniska lösningarna somfinns idag för att minimera radonhalterna i våra bostäder, samt att se om vikan komma fram till en ev. förbättring.De metoder vi har använt oss av är framförallt litteraturer samt intervjuermed en konsult som är specialiserad inom just ämnet radon.Det som styr inträngning av radon i bostäder är grundläggningsmetoder. Entorpargrund ventilerar sig självt, men en platta på mark behöver man ta tillåtgärder som är säkra och har en lång livstid.De två lösningar vi presenterar här är bort ventilering av radonhaltig luft, ochett plastmembran som placeras under grunden vilket förhindrar att radontränger upp i våra hus.<br>The housing requirement is very large in Stockholm. The county council'sforecast shows that we need to build about 16,000 homes annually to coverthe needs.Radon that penetrates our homes is a major health risk when 500 peoplesuffer from lung cancer each year due to high radon levels in the home.This we think can be reduced by the right methods.The purpose of this report is to compare the various technical solutionsavailable today to minimize the radon levels in our homes, as well as to see ifwe can reach a possible. improvement.The methods we have used are mainly literature and interviews with aconsultant specializing in the subject radon.Above all, the founding method is of great importance to radon's intrusion inthe homes. A village ground is ventilating itself, but a plate on the groundrequires measures that are safe and have a long lifespan.The two solutions we present here are the removal of radon-containing air,and a plastic membrane underlying the ground that prevents radon frompenetrating into our houses.
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Jabarivasal, Naghi. "Indoor atmospheric radon in Hamadan, Iran : atmospheric radon indoors and around Hamadan city in Iran." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5452.
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Radon gas may be a major air quality hazard issue inside the home. Radon (222Rn) comes from the natural breakdown of radioactive uranium (238U) via radium (226Ra) in soil, rocks, and water. Radon and its progeny contribute more than 50% of the total radiation dose to the human population due to inhalation; it can result in severe and fatal lung disease. This investigation has determined the radon concentrations in seventy-seven domestic houses in a mountainous area of Hamadan in Iran which were monitored using track-etch detectors of type CR-39 exposed for three month periods. The arithmetic mean radon concentration in Hamadan buildings was determined to be 80 Bqm-3 and also an average indoor annual effective dose equivalent for the Hamadan city population was calculated as 1.5 mSv. Maximum radon concentrations were noted during the winter and spring season. In addition to this, 28 water wells were monitored by utilizing a Sarad Doseman detector at hourly intervals over extended periods. Radon measurements were also carried out in the nearby Alisadr show cave, using Solid State Nuclear Track etch Detectors (SSNTDs) during the winter and the spring periods. In the cave, the average annual effective geometric and arithmetic mean dose for guides was 28.1 and 34.2 mSv respectively. The dose received by visitors was very low. Hamadan city is built on alluvial fan deposits which are the source of the local water supply. The data from the wells shows that the groundwater in these alluvial deposits influences the flux of radon. The atmospheric radon concentration measurement in wells above the water surface ranged from 1,000 Bqm-3 to 36,600 Bqm-3. There is evidence that radon-rich ground waters play a significant role in the transport of radon through the alluvial fan system. There is evidence that the radon concentrations in homes in Hamadan are greatly influenced by the porous nature of the underlying geology and the movement of groundwater within the alluvial fan.
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Denman, Antony Roger. "An assessment of the health benefits of radon mitigation of buildings in radon affected areas." Thesis, Leeds Beckett University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287657.
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Strömgren, Anders, and Evelina Widén. "Radon i betongkonstruktioner : - Kan det undvikas?" Thesis, KTH, Byggvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102405.
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The following article consists of two parts; one part is about house construction and the other is a specialization about radon. The house construction part describes how to project a house from start. It contains the conformation of the house, the installations needed, calculations considering the strength of the construction, energy calculation and what materials were chosen. Calculations considering the costs of building and operate the house has been carried out. The result showed that the house would cost approximately two million Swedish kroner to build and thirteen thousand kronor a year to operate. We feel very happy about the resulting house and content about the fact that it fulfills all the demands of BBR19. The specialization about radon is integrated in the article as a report from a consult considering the radon emanation in the house. The report has a wide informative base about what radon emanation is, how it works and what laws there are in the subject. The specialization of the report is about a quite current topic; when we have stopped using aerated concrete in houses, are there still risk that ordinary concrete emanates radon and gives of radon gas in our homes? Is it possible to reassure that this does not happen? What we have concluded is that it is very likely that the concentrations of radon in a room will be high if the wrong kind of ballast is used in the concrete. It is possible to reassure that this does not happen, but at the moment there are no clear guidelines about tolerated values from building materials. Also there is yet no money to earn by doing quality controls on ballast. If the demand for radon safe ballast increases due to a gathered effort to lower the requirements considering radon concentrations, the development of quality controls will go faster.
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Font, Guiteras Lluís. "Radon generation, entry and accumulation indoors." Doctoral thesis, Universitat Autònoma de Barcelona, 1997. http://hdl.handle.net/10803/3397.
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Tung, Sui. "Radon potential mapping in Hong Kong." Click to view the E-thesis via HKUTO, 2010. http://sunzi.lib.hku.hk/hkuto/record/B44142420.
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Ayo, Alvaro A. "Ramon Perez de Ayala: Autor humoristico." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/288944.
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En esta disertacion mostramos que Ramon Perez de Ayala es un autor humoristico, es decir, un autor que se aproxima al mundo tanto criticamente como de modo tolerante y afectivo. El impetu critico lo impulsa a escudrinar su entorno y a desvelar lo que se halla tras lo aparente. Su postura tolerante lo ayuda a comprender las contradicciones que percibe y a preconizar que todo y todos tienen algo que aportar al mundo, donde el observa la armonia caudalosa, concepto que explica la presencia de todas las ideas y las personalidades, infinitamente enfrentadas entre si. Su arte constituye un intento de recrear este estado de "armonia desarmonica", como se aprecia en la riqueza de personajes conflictivos, incongruentes e imprevisibles que crea. Para explicar la manera en que Ayala se aproxima al mundo y al arte, en base a sus ideas y a las que Luigi Pirandello vierte en L'umorismo , configuramos la nocion de acercamiento humoristico . Esta se apuntala en la distincion entre dos conceptos: lo comico, que se refiere a las discrepancias que se revelan a raiz del escudrinamiento critico del mundo y el humorismo, que es la tolerancia de las discrepancias, nacida de la observacion critica. Nuestra nocion consta de dos fases. En la primera, dominada por lo comico, se escudrina a las personas. Surge la risa. El humorismo predomina en la segunda fase, en que se llega a comprender el origen de las contradicciones que se percibe. La risa da paso a una sonrisa cervantina--confortadora y comprensiva. Mediante el estudio del acercamiento humoristico intentamos ofrecer una imagen de Perez de Ayala diferente a la del rigido moralizador que predomina en la critica.
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李英傑 and Ying-kit Li. "Management of radon in tunnel drilling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B31255231.
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Tung, Sui, and 董帥. "Radon potential mapping in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44142420.
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Bisset, D. A. "Seismic migration using the radon transform." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382336.
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Hames, Harvey Joseph. "Judaism in Ramon Llull (1232-1316)." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389834.
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Khayata, Mohamed. "Inversion de la transformation de Radon." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376065397.
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Li, Ying-kit. "Management of radon in tunnel drilling /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2543892x.
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Gironi, Elena. "Teorema di Radon-Nikodym e Statistica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9643/.
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Il presente elaborato vuole illustrare alcuni risultati matematici di teoria della misura grazie ai quali si sono sviluppate interessanti conseguenze nel campo della statistica inferenziale relativamente al concetto di statistica sufficiente. Il primo capitolo riprende alcune nozioni preliminari e si espone il teorema di Radon-Nikodym, sulle misure assolutamente continue, con conseguente dimostrazione. Il secondo capitolo dal titolo ‘Applicazioni alla statistica sufficiente’ si apre con le definizioni degli oggetti di studio e con la presentazione di alcune loro proprietà matematiche. Nel secondo paragrafo si espongono i concetti di attesa condizionata e probabilità condizionata in relazione agli elementi definiti nel paragrafo iniziale. Si entra nel corpo di questo capitolo con il terzo paragrafo nel quale definiamo gli insiemi di misura, gli insiemi di misura dominati e il concetto di statistica sufficiente. Viene qua presentato un importante teorema di caratterizzazione delle statistiche sufficienti per insiemi dominati e un suo corollario che descrive la relativa proprietà di fattorizzazione. Definiamo poi gli insiemi omogenei ed esponiamo un secondo corollario al teorema, relativo a tali insiemi. Si considera poi l’esempio del controllo di qualità per meglio illustrare la nozione di statistica sufficiente osservando una situazione più concreta. Successivamente viene introdotta la nozione di statistica sufficiente a coppie e viene enunciato un secondo teorema di caratterizzazione in termini di rapporto di verosimiglianza. Si procede quindi ad un confronto tra questi due tipi di sufficienza. Tale confronto viene operato in due situazioni differenti e porta a risultati diversi per ogni caso. Si conclude dunque l’elaborato marcando ancora l’effettiva bontà di una statistica sufficiente in termini di informazioni contenute al suo interno.
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Himes, Lori J. "Homeowner perception and response to radon." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-01312009-063622/.
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BU, SHANGQUAN. "La propriete de radon-nikodym analytique." Paris 7, 1990. http://www.theses.fr/1990PA077015.
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On construit des fonctions analytiques, ayant des proprietes particulieres du disque unites a valeurs dans un espace de banach n'ayant pas la propriete de radon-nikodym analytique. Plus precisement, on montre que dans un espace de banach n'ayant pas la propriete de radon-nikodym analytique, il existe une fonction analytique bornee du disque a unites a valeurs dans cet espace qui possede des proprietes de divergence radiale extremale. On donne aussi une amelioration de ce resultat. On montre que la convergence des martingales pluri-sousharmoniques caracterise la propriete de radon-nikodym analytique. On etudie aussi la propriete de radon-nikodym analytique pour des sous-ensembles des espaces de banach. Enfin, une autre demonstration du theoreme de krivine-maurey a ete donnee en utilisant la notion d'indice
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SYAHRIR, SYAHRIR. "TRANSPORT OF RADON IN STILL WATER." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109117669.
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Quellmalz, Michael. "A generalization of the Funk–Radon transform to circles passing through a fixed point." Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-192513.
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The Funk–Radon transform assigns to a function on the two-sphere its mean values along all great circles. We consider the following generalization: we replace the great circles by the small circles being the intersection of the sphere with planes containing a common point ζ inside the sphere. If ζ is the origin, this is just the classical Funk–Radon transform. We find two mappings from the sphere to itself that enable us to represent the generalized Radon transform in terms of the Funk–Radon transform. This representation is utilized to characterize the nullspace and range as well as to prove an inversion formula of the generalized Radon transform.
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Speelman, Wilcot John. "Modelling and measurement of radon diffusion through soil for application on mine tailings dam." Thesis, University of the Western Cape, 2004. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=init_4954_1178282946.
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Radon has been identified as an important factor that could result in a health hazard by studies all around the world. The health risks can be minimised by preventive measures where radon is highly concentrated as in some mines and homes. Measuring and modelling the radon concentrations in the mine dump soil, can help to deduce the radon flux to identify the problem areas for rehabilitation especially in the cases of gold and uranium mine tailings. Rehabilitation in those cases usually consists of a multilayer cover of solids like crushed rock or clay. A passive method incorporating electret technology was used in this study to determine the radon emanation coefficient of the soil. This investigation also describes the modelling of a depth profile with respect to the radon activity concentration to understand from how deep radon might be migrating, as well as the effect of different diffusion lengths.
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Manavhela, Ramudzuli Fijiant. "In-situ measurements of radon concentrations in soil gas at a site on the Cape Flats." Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_2407_1242371669.
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<p>Measurements of radon (²<br>²<br>²<br>Rn) concentration in soil gas are routinely used to locate geological fault zones. This study was undertaken to investigate the systematic effects that influence radon soil-gas measurements, in preparation for the first such fault zone measurements in South Africa.</p>
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Hielscher, Ralf. "The Radon transform on the rotation group." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2009. http://nbn-resolving.de/urn:nbn:de:bsz:105-3614018.
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Ein zentrales Problem der quantitativen Texturanalyse ist die numerische Inversion der eindimensionalen Radontransformation auf der Lie--Gruppe SO(3) aller Rotationen im dreidimensionalen euklidischen Raum. In der vorliegenden Dissertation wird die Lösbarkeit und Eindeutigkeit dieses inversen Problems untersucht und Fehlerabschätzungen unter Berücksichtigung unvollständiger und fehlerbehafteter Daten hergeleitet. Weiterhin wird ein Algorithmus zur Lösung des inversen Problems vorgeschlagen, welcher auf einer Diskretisierung mittels radialer Basisfunktionen basiert und schnelle Fouriermethoden auf der Kugel und der Lie-Gruppe SO(3) benutzt. In numerischen Tests wird gezeigt, dass der Algorithmus für die Rekonstruktion scharfer Texturen aus Beugungsdaten gemessen auf einem hochauflösenden, ungleichmäßigen Messraster geeignet ist.
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Goto, Masayoshi, Jun Moriizumi, Hiromi Yamazawa, Takao lida, and Weihai Zhuo. "Estimation of global radon exhalation rate distribution." American Institite of Physics, 2008. http://hdl.handle.net/2237/12041.
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Sulak, Jodi Lopez. "Radon remediation using fluid-based recovery systems." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17061.
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Lladó, i. Vilaseca Jordi. "Ramon Vinyes i el teatre (1904-1939)." Doctoral thesis, Universitat Autònoma de Barcelona, 2002. http://hdl.handle.net/10803/4829.
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"Ramon Vinyes i el teatre (1904-1939)" investiga la trajectòria d'aquest escriptor català (Berga, 1882, Barcelona, 1952), consagrat en "El sabio catalán", personatge de la novel.la Cien años de soledad de Gabriel García Márquez. L'estudi se centra en la faceta de dramaturg, amb atenció a l'etapa 1925-1939 en què destacà a Catalunya. En els primers capítols s'estudien els seus orígens dins la cultura de la Renaixença i l'entorn polític, social i ideològic de la seva ciutat de naixement. Des de 1904 en què es projectaren les seves primeres peces, s'analitza la seva producció en connexió amb les teoritzacions teatrals defensades per les darreres fornades del modernisme i el noucentisme naixent. Dins d'aquesta transició, Vinyes optà per una tragèdia inspirada en els models teatrals del modernisme -Ibsen, D'Annunzio, Hauptmann, Maeterlinck-, en visió oposada a la major part de les directrius estètiques i comercials de l'escena i la crítica de Barcelona cap a 1910.<br/>L'estudi apunta tot seguit els condicionaments literaris que determinaren l'emigració de Vinyes a Colòmbia el 1913, on s'establí a Barranquilla des de 1914. L'autor de la tesi aprofundeix en el paper com a teòric i orientador exercit en aquell país durant la seva estada entre 1913 i 1925. Bona part de l'apartat és ocupat per l'estudi de la revista Voces de Barranquilla (1917-1920), de la qual fou el principal impulsor i que representà una de les principals plataformes de l'avantguarda a Hispanoamèrica. Hi adquireixen relleu les posicions que sobre estètica literària i art dramàtic hi adoptà Vinyes. Malgrat la distància colombiana, es trobava en ple seguiment de la cultura catalana i europea: es destaca el paper revulsiu de Voces en autors colombians contraris a tota restricció acadèmica, estètica o moral damunt del fet literari. <br/>El nucli de la tesi, desenvolupat en els capítols 5 i 6, analitza la producció i recepció de les peces estrenades, editades o inèdites de Vinyes durant el fecund període 1926-1939, en connexió amb els seus nombrosos posicionaments crítics. Aquesta panoràmica s'insereix dins el context literari català, singularment després de l'estrena de Llegenda de boires (1926), que significà el reingrés a l'escena barcelonina amb una polèmica recepció. Hom subratlla el seguiment respecte de revulsius models foranis: l'expressionisme alemany -Bertolt Brecht- o la via lírica de Jean Giraudoux, per exemple. Les expectatives desvetllades per les seves conferències i escrits de 1928-1929, resten confirmades en obres com Viatge (1927 ), Qui no és amb mi...(1929), Peter's Bar. (1929) o Ball de titelles (1936), farsa antiburgesa que representa a parer de Lladó una de les seves vies més consolidades en el camp creatiu. Durant el període de la Segona República, la tesi incideix en les orientacions polítiques de la seva obra, amb èmfasi en el compromís de les seves posicions durant els anys de la Guerra Civil. L'avinentesa dels seus articles com a crític de rereguarda atent als posicionaments d'Erwin Piscator o l'estrena d'obres com Comiats a trenc d'alba (1938) i Fum sobre el teulat (1939), confirmen la implicació dins el moment històric, coherent amb els plantejaments antiburgesos d'anys precedents.<br/>Lladó recalca en les conclusions el paper de Vinyes en el teatre català, a mig camí dels principis tràgics d'inicis de segle i l'expectativa de modernització que significaren les seves propostes durant els anys 20 i 30. L'estudi és coronat amb un apèndix ampli que conté significatius textos teoricocrítics redactats entre 1917 i 1939 i una vasta bibliografia que fixa i data el conjunt de la producció literària de l'autor: s'hi inclouen nombrosos escrits inèdits classificats en el Fons Ramon Vinyes de l'Arxiu Comarcal de Berga, fruit d'una donació dels hereus de l'escriptor a la qual contribuí l'autor de la tesi.<br>"Ramon Vinyes and the Theater (1904-1939)" studies the trajectory of this Catalan writer (Berga, 1882-Barcelona, 1952) who was immortalized as "The Wise Catalan", one of the characters in Gabriel García Márquez' novel One Hundred Years of Solitude.The study focuses on his activity as a playwright, paying special attention to the period from 1925 to 1939, during which he was a prominent figure in Catalonia.The first chapters examine his origins against the background of the "Renaixença" (Catalonia's nineteenth century literary renaissance) and the social, political and ideological environment of Berga, his hometown. Starting in 1904 when his first plays were staged, came into light his work is analyzed in connection with the theatrical theories defended by the last generations of Catalan Modernism and the first ones of the movement that followed it: the"Noucentisme". In this period of transition Vinyes chose a style of tragedy inspired by Ibsen, D'Annunzio, Hauptmann, Maeterlink..., which were models to the Modernists, defying thereby many of the esthetic and commercial guidelines followed by the theatrical community and the critics in Barcelona around 1910.<br/>Next, the study delves into the literary climate that determined Vinyes' emigration to Colombia in 1913, where he settled in Barranquilla the following year. The thesis deepens on the leading role as a theoretician that Vinyes played in that country between 1913 and 1925. This section devotes mainly to the study of the Barranquilla's magazine Voces (1917-1920), which he promoted and which became one of the main platforms for the avant-garde in Latin America. Vinyes' positions regarding literary esthetics and dramatic arts are emphasized. Despite the geographical distance Vinyes followed Catalan and European culture very closely. The study points out the thought-provoking impact that Voces had on Colombian authors opposed to any academic, esthetic or moral restriction on the literary act.<br/>The core of the thesis, developed in chapters 5 and 6, analyzes the production and reception of Vinyes' staged, edited and unpublished plays, during the productive 1926-1939 period, establishing links with his numerous critical positions. This survey is placed in the context of Catalan Literature, particularly after the opening of Llegenda de boires (1926), which represented his controversial return to Barcelona's theater scene.The study emphasizes the influence on his work of groundbreaking foreign models: German Expressionism -Bertolt Brecht- or Jean Giraudoux' lyrical mode, for instance. The expectations aroused by his talks and writings of 1928-29 are fulfilled in plays such as Viatge (1927), Qui no és amb mi...(1929), Peter's Bar (1929), or Ball de titelles (1936), an anti-bourgeois farce which is deemed to be one of his strongest suits in the creative field. In the Spanish Republican period, the thesis delves into the political leanings of Vinyes' work, emphasizing his commitment during the years of the Civil War. The timeliness of his articles as a critic behind the lines who was paying attention to Erwin Piscator's perspectives besides the opening of plays such as Comiats a trenc d'alba (1938) and Fum sobre el teulat (1939), confirm his implication in the historical moment, consistent with anti-bourgeois stance of preceding years.<br/>Lladó emphasizes in his conclusions Vinyes's role in Catalan theater, midway between the tragical principles of the beginning of the century and the expectations of modernization that his literary proposals represented during the 20's and 30's. The study concludes with an extensive appendix featuring significant theoretical and critical texts written between 1917 and 1939, as well as a vast bibliography that catalogues the author's entire literary production. The bibliography includes the unpublished writings archived in the "Ramon Vinyes Foundation" at the "Arxiu Comarcal de Berga" (Berga's regional records), the result of a donation by the writer's heirs to which the author of this thesis also contributed.
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su, vinberg@ebv pvt msu. "The Dual Horospherical Radon Transform for Polynomials." ESI preprints, 2001. ftp://ftp.esi.ac.at/pub/Preprints/esi1064.ps.
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Arguin, Hans. "Étude d'une antenne circulaire de rayon arbitraire /." Montréal : Trois-Rivières : Université du Québec à Montréal ; Université du Québec à Trois-Rivières, 2003. http://www.uqtr.ca/biblio/notice/resume/18046060R.pdf.
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Thèse (M. en physique)--Université du Québec à Montréal, 2003.<br>En tête du titre: Université du Québec à Montréal. "Mémoire présenté comme exigence partielle de la maîtrise en physique offerte par extension à l'Université du Québec à Montréal en vertu d'un protocole d'entente avec l'Université du Québec à Trois-Rivières." Bibliogr.: f. 70-71.
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Brancaleone, David. "The Veneto tradition of Ramon Llull's Felix." Thesis, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397429.
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Grouy, Thibaut. "Radon-type transforms on some symmetric spaces." Doctoral thesis, Universite Libre de Bruxelles, 2019. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/285815.
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Dans cette thèse, nous étudions des transformées de type Radon sur certains espaces symétriques. Une transformée de type Radon associe à toute fonction continue à support compact sur une variété $M$ ses intégrales sur une classe $Xi$ de sous-variétés de $M$. Le problème sur lequel nous nous concentrons est l'inversion d'une telle transformée, c'est-à-dire déterminer la fonction à partir de ses intégrales sur les sous-variétés dans $Xi$. Nous présentons d'abord la solution de ce problème inverse due à Sigurdur Helgason et François Rouvière, entre autres, lorsque $M$ est un espace symétrique riemannien isotrope et $Xi$ une certaine orbite de sous-variétés totalement géodésiques de $M$ sous l'action d'un groupe de transformations de Lie de $M$. La transformée de Radon associée est qualifiée de totalement géodésique.Sur les espaces symétriques pseudo-riemanniens semisimples, nous considérons une autre transformée de type Radon, qui associe à toute fonction continue à support compact ses intégrales orbitales, c'est-à-dire ses intégrales sur les orbites du sous-groupe d'isotropie du groupe des transvections. L'inversion des intégrales orbitales, qui est donnée par une formule-limite, a été obtenue par Sigurdur Helgason sur les espaces symétriques lorentziens à courbure sectionnelle constante et par Jeremy Orloff sur tout espace symétrique pseudo-riemannien semisimple de rang un. Nous résolvons le problème d'inversion des intégrales orbitales sur les espaces de Cahen-Wallach, qui sont les modèles d'espaces symétriques lorentziens indécomposables résolubles.Pour finir, nous nous intéressons aux transformées de type Radon sur les espaces symétriques symplectiques à courbure de type Ricci. L'inversion des orbitales intégrales sur ces espaces lorsqu'ils sont semisimples a déjà été obtenue par Jeremy Orloff. En revanche, lorsque ces espaces ne sont pas semisimples, la transformée donnée par les intégrales orbitales n’est pas inversible. Ensuite, nous déterminons les orbites de sous-variétés totalement géodésiques symplectiques ou lagrangiennes sous l'action d'un groupe de transformations de Lie de l'espace de départ. Dans ce contexte, la méthode d'inversion développée par Sigurdur Helgason et François Rouvière, entre autres, ne fonctionne que pour les transformées de Radon totalement géodésiques symplectiques sur les espaces symétriques kählériens à courbure holomorphe constante. Les formules d'inversion de ces transformées sur les espaces hyperboliques complexes sont dues à François Rouvière. Nous calculons les formules d'inversion de ces transformées sur les espaces projectifs complexes.<br>In this thesis, we study Radon-type transforms on some symmetric spaces. A Radon-type transform associates to any compactly supported continuous function on a manifold $M$ its integrals over a class $Xi$ of submanifolds of $M$. The problem we address is the inversion of such a transform, that is determining the function in terms of its integrals over the submanifolds in $Xi$. We first present the solution to this inverse problem which is due to Sigurdur Helgason and François Rouvière, amongst others, when $M$ is an isotropic Riemannian symmetric space and $Xi$ a particular orbit of totally geodesic submanifolds of $M$ under the action of a Lie transformation group of $M$. The associated Radon transform is qualified as totally geodesic.On semisimple pseudo-Riemannian symmetric spaces, we consider an other Radon-type transform, which associates to any compactly supported continuous function its orbital integrals, that is its integrals over the orbits of the isotropy subgroup of the transvection group. The inversion of orbital integrals, which is given by a limit-formula, has been obtained by Sigurdur Helgason on Lorentzian symmetric spaces with constant sectional curvature and by Jeremy Orloff on any rank-one semisimple pseudo-Riemannian symmetric space. We solve the inverse problem for orbital integrals on Cahen-Wallach spaces, which are model spaces of solvable indecomposable Lorentzian symmetric spaces.In the last part of the thesis, we are interested in Radon-type transforms on symplectic symmetric spaces with Ricci-type curvature. The inversion of orbital integrals on these spaces when they are semisimple has already been obtained by Jeremy Orloff. However, when these spaces are not semisimple, the orbital integral operator is not invertible. Next, we determine the orbits of symplectic or Lagrangian totally geodesic submanifolds under the action of a Lie transformation group of the starting space. In this context, the technique of inversion that has been developed by Sigurdur Helgason and François Rouvière, amongst others, only works for symplectic totally geodesic Radon transforms on Kählerian symmetric spaces with constant holomorphic curvature. The inversion formulas for these transforms on complex hyperbolic spaces are due to François Rouvière. We compute the inversion formulas for these transforms on complex projective spaces.<br>Doctorat en Sciences<br>info:eu-repo/semantics/nonPublished