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Artykuły w czasopismach na temat "Débris spatiaux – Environnement"
Melay, Alexandre. "[TIMESCAPES]". HYBRIDA, nr 5(12/2022) (27.12.2022): 176. http://dx.doi.org/10.7203/hybrida.5(12/2022).25383.
Pełny tekst źródłaSoares, José Wellington Lúcio, i Raimundo Freitas Aragão. "PAISAGEM E GEOGRAFIA VERNACULAR NA SERRA DA MERUOCA - CE: FOTOGRAFIA E PINTURA COMO AUTOTESTEMUNHOS". Revista da Casa da Geografia de Sobral (RCGS) 22, nr 1 (25.04.2020): 93–112. http://dx.doi.org/10.35701/rcgs.v22n1.654.
Pełny tekst źródłaRozprawy doktorskie na temat "Débris spatiaux – Environnement"
Bariteau, Muriel. "Prolifération des débris orbitaux : production et évolution des particules secondaires". École nationale supérieure de l'aéronautique et de l'espace (Toulouse ; 1972-2007), 2001. http://www.theses.fr/2001ESAE0012.
Pełny tekst źródłaMoussi, Aurélie. "Détection de débris orbitaux : comparaison avec les modèles". Toulouse, ENSAE, 2005. http://www.theses.fr/2005ESAE0016.
Pełny tekst źródłaRival, Muriel. "Impacts hypervitesse de micrométéorites et débris orbitaux sur les satellites : formation d'éjecta et implications pour l'environnement". Toulouse, ENSAE, 1997. http://www.theses.fr/1997ESAE0012.
Pełny tekst źródłaBerthoud, Lucinda. "Micrométéoroi͏̈des et débris orbitaux observés en orbite basse terrestre". Toulouse, ENSAE, 1993. http://www.theses.fr/1993ESAE0031.
Pełny tekst źródłaMaury, Thibaut. "Consideration of space debris in the life cycle assessment framework". Electronic Thesis or Diss., Bordeaux, 2019. http://www.theses.fr/2019BORD0051.
Pełny tekst źródłaSeveral actors of or related to the European space industry, such as ArianeGroup and the European Space Agency (ESA), have identified life cycle assessment (according to ISO14040/44) as the most appropriate methodology to measure and minimise their environmental impact. Nevertheless, space systems deal with a strong particularity which adds new aspects considering the scope of the LCA framework. Space missions are the only human activity that crosses all segments of the atmosphere and stays “out” of the natural environment and ecosystems. Regarding space systems with a holistic approach, environmental impacts could occur not only in the conventional ecosphere but also in the outer space (i.e. the orbital environment).Consequently, the current scope of LCA studies should be broadened to take into account the on-orbit lifetime as well as the end-of-life disposal of the spacecraft. Yet, it is becoming a crucial point of the space mission design due to the future increase of the orbital population composed in a major part by space debris. In this way, LCA studies of space missions could indicate trade-offs not only between typical impact categories (toxicity and climate change for example) but also with regard to impacts generated in the orbital environment with a particular focus on space debris related impacts.Hence, the priority has been given to the integration of a new impact category called orbital space use in the life cycle impact assessment framework. To address the environmental burdens comprehensively in this new category, impact pathways linking elementary flows to environmental mechanisms (midpoint) and damages (endpoint) are developed within the Area-of-Protection ‘Natural resources’. Space debris is identified as the main stressor of the orbital environment. Thus, ‘characterisation factors’ are defined and calculated at midpoint level to assess the potential impact of a space mission on the orbital environment. The methodology is applied to a case study to prove its applicability: the potential impact of a theoretical space mission is addressed through the comparison of three disposal scenarios. Also, a first attempt regarding the characterisation of the endpoint damage is provided taking into account the economic externalities caused by space debris. Finally, remaining methodological challenges and perspectives for future work are provided
González, Yago. "La Technique des Débits Commutés pour l'évaluation de la dégradation à faible débit de dose des technologies bipolaires en environnement spatial". Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20192/document.
Pełny tekst źródłaBefore supplying lots of components for the manufacture of orbital systems, large space agencies (CNES, ESA, NASA, JAXA ...) and the Industrial Space (EADS, Thales, ...) should ensure the reliability lots offered by manufacturers of integrated circuits. In order to ensure reliability of components, tests are performed following recommendations to select and sort the components according to their resistance to different failure modes. Of all these tests, some are typical for space applications: tests held in the dose. The specificity of the tests held at the dose of components for space applications due to the fact that the environment is a space radiation environment which causes ionization in the materials of the satellite. Following this ionization charges are created in the material and induce changes in the materials that comprise integrated circuits, which can cause drift of their electrical characteristics. These abuses of the electrical parameters in a space environment can be viewed as accelerated aging of electronic components, and tests are dedicated to predict and verify the correct operation of the components even after the accelerated aging caused by dose. In this thesis we investigate the applicability of a technique for accelerated testing of components developed in bipolar UM2: 'The technique of Switched Flows'. A study of the effect of the polarization during irradiation was conducted during this thesis, to understand the impact of the polarization of the bipolar components on the estimates obtained in an accelerated manner using this technique
Maury, Thibaut. "Consideration of space debris in the life cycle assessment framework". Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0051/document.
Pełny tekst źródłaSeveral actors of or related to the European space industry, such as ArianeGroup and the European Space Agency (ESA), have identified life cycle assessment (according to ISO14040/44) as the most appropriate methodology to measure and minimise their environmental impact. Nevertheless, space systems deal with a strong particularity which adds new aspects considering the scope of the LCA framework. Space missions are the only human activity that crosses all segments of the atmosphere and stays “out” of the natural environment and ecosystems. Regarding space systems with a holistic approach, environmental impacts could occur not only in the conventional ecosphere but also in the outer space (i.e. the orbital environment).Consequently, the current scope of LCA studies should be broadened to take into account the on-orbit lifetime as well as the end-of-life disposal of the spacecraft. Yet, it is becoming a crucial point of the space mission design due to the future increase of the orbital population composed in a major part by space debris. In this way, LCA studies of space missions could indicate trade-offs not only between typical impact categories (toxicity and climate change for example) but also with regard to impacts generated in the orbital environment with a particular focus on space debris related impacts.Hence, the priority has been given to the integration of a new impact category called orbital space use in the life cycle impact assessment framework. To address the environmental burdens comprehensively in this new category, impact pathways linking elementary flows to environmental mechanisms (midpoint) and damages (endpoint) are developed within the Area-of-Protection ‘Natural resources’. Space debris is identified as the main stressor of the orbital environment. Thus, ‘characterisation factors’ are defined and calculated at midpoint level to assess the potential impact of a space mission on the orbital environment. The methodology is applied to a case study to prove its applicability: the potential impact of a theoretical space mission is addressed through the comparison of three disposal scenarios. Also, a first attempt regarding the characterisation of the endpoint damage is provided taking into account the economic externalities caused by space debris. Finally, remaining methodological challenges and perspectives for future work are provided
Boch, Jérôme. "Effet du faible débit dose sur les technologies bipolaires". Reims, 2003. http://www.theses.fr/2003REIMS013.
Pełny tekst źródłaBipolar technologies play a variety of important roles in space systems where they are exposed to radiation. In an ionizing environment, the base current of bipolar transistors increases and the current gain decreases. Increased recombination in the emitter-base depletion region is the main mechanism responsible for the increased base current. Many bipolar technologies degrade more at low dose rates than at high dose rates for a given total dose what is a difficult hardness assurance challenge. Methods of predicting the low-dose-rate response using laboratory dose rates, including irradiation at high temperature, have been reasonably successful at identifying technologies that suffer from ELDRS, but it is still difficult to identify a single test for all bipolar technologies. The aim of this work is then to investigate and improve the present methods in order to establish a sigle test for all bipolar technologies. Based on experimental results, physical explanation of phenomena occurring during elevated temperature irradiations has been proposed and a model of degradation has been expanded. From the observation of all the obtained results, a new approach of the device testing, based on the switching from high dose rate to low dose rate has been proposed
Ducret, Samuel. "Étude de l'effet de débit de dose : une nouvelle approche de la fiabilité des technologies bipolaires pour l'environnement radiatif spatial". Montpellier 2, 2005. http://www.theses.fr/2005MON20186.
Pełny tekst źródłaBonora, Lionel. "Dégradation des technologies bipolaires et bicmos par radiations ionisantes : implications en assurance qualité pour l'industrie spatiale". Toulouse, ENSAE, 1998. http://www.theses.fr/1998ESAE0006.
Pełny tekst źródłaKsiążki na temat "Débris spatiaux – Environnement"
Garrison, Darrin Ann, i O'Leary Beth Laura, red. Handbook of space engineering, archaeology, and heritage. Boca Raton: Taylor & Francis, 2009.
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