Дисертації з теми "Petits satellites"
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Choi, Kyeong Il Kevin. "Nouvelles techniques pour la conception des petits satellites et de leurs communications." Paris, ENST, 1999. http://www.theses.fr/1999ENST0008.
Повний текст джерелаChoi, Kevin Kyeong-il. "Nouvelles techniques pour la conception des petits satellites et de leurs communications /." Paris : École nationale supérieure des télécommunications, 1999. http://catalogue.bnf.fr/ark:/12148/cb370908681.
Повний текст джерелаBeauvalet, Laurène. "Etude dynamique des systèmes multiples de petits corps : application au système de Pluton." Observatoire de Paris (1667-....), 2011. https://theses.hal.science/tel-00689508.
Повний текст джерелаA system refers to a set of small bodies tied by gravitation and orbiting around their common center of mass, which orbits around the Sun. In order to deduce the value of those parameters, we have created an N-bodies numerical model. Our model includes the planetary perturbations as well as the integration of orbital motion's variationnal equations, a key feature of least-square method fitting. We applied our model to Pluto's system, which possesses features from both multiple and planetary systems. First, we have fitted our model to simulated data in order to study the evolution of the uncertainty on Nix's and Hydra's mass. We show that their mass will most probably remain unconstrained untill the arrival of New Horizons probe in the system. We also show that the effect of the polar oblateness on the orbits is cannot determined and studied the future contribution of GAIA to our knowledge of the system. Then, we have fitted our model to astrometric observations of the system. The fitting of the model to the observations has given very different masses for Nix and Hydra. Nonetheless, both in our study and the previous ones, the said masses are unconstrained enough for the results to remain coherent. The solution for the stellite's motion we then obtained has been used during our fitting of Pluto's heliocenter motion. At last, we have adapted our model to (45)Eugenia's system and have found results compatible with previous studies
El, Moutamid Maryame. "Etude analytique et numérique des Résonances de Moyen Mouvement : Application à la dynamique des petits satellites de Saturne." Observatoire de Paris (1667-....), 2013. https://hal.science/tel-02095152.
Повний текст джерелаThe aim of my work is to better understand the dynamics of the small Saturnian satellites that are in mean motion resonance with Mimas (whose mass will be noted μ′s), and are also associated with rings and arcs of matter. The difficulty with these mean motion resonances is that, even in the simplest case where the small satellites (μs) is massless and the inclinations are equal to zero (the Restricted Planar Three Problem), there are several resonances associated with each mean motion commensura- bility. More precisely, I studied first order mean motion resonances m+1:m (m is an integer). In this case, there are only two resonances, called Corotation Eccentric Resonances (CERs) and Lindblad Eccentric Resonances (LERs). Having two degrees of freedom, the Hamiltonian which describes the motion of μs and μ′s is in general non integrable, and leads to chaotic motions in some regions in the phase space. The aims of this thesis are : 1. To clearly distinguish the two types of resonances (CER and LER). I show here that Lindblad resonances mainly excite the orbital eccentricity of the test particle (leaving the semi- major axis relatively unaffected) while the corotation resonances mainly change the semi-major axis (leaving the eccentricity relatively unaffected). 2. To discuss the integrability of the two-degree of freedom system in presence of the two critical angles corresponding to the two resonances. Then, I show the presence of constants of motion that I interpret physically. 3. To rescale the restricted problem (μ = 0) and obtain a model that depends only upon two dimensionless parameters : the distance D between the two resonances and a parameter εL which depends on the mass and orbital eccentricity of μ′s. This approach allows me to study the problem in a generic way. For D = 0, the problem is integrable. I show numerically that large chaotic regions appear for small values of D. For larger values of D, the system tends towards an integrable system again, that I have solved by using adiabatic invariants arguments
Agnan, Marco. "SmallSats : Technical developments to address contemporary goals in space science." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASP119.
Повний текст джерелаThis thesis in Validation of Acquired Experience (VAE) explores how SmallSats (from CubeSats to 500kg) are unlocking new possible missions and discoveries in space science. The topics of interests go from Earth science, Solar science to remote and in-situ astrophysics.In the NewSpace era, benefiting from recent technological advances of hardware miniaturization and launch cost reductions, new scientific objectives are now accessible thanks to SmallSats, finding their best uses in:- constellation for multi point science (remote or in-situ) cases;- high risk / high return cases.Through a detailed presentation of the Project addressed during the author's carreer, this thesis explores scientific domains where SmallSats will have an innovative use in the future, highlighting limitations and technological solutions associated with such platforms.The topic of asteroid exploration using SmallSats is presented in more details, with a quantification of the scientific return of proposed concepts
Beauvalet, Laurène. "Étude dynamique des systèmes multiples de petits corps : application au système de Pluton." Phd thesis, Observatoire de Paris, 2011. http://tel.archives-ouvertes.fr/tel-00689508.
Повний текст джерелаRowsey, Robert R. "Design restrictions and licensing for Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA239951.
Повний текст джерелаThesis Advisor(s): Panholzer, R. Second Reader: Wadsworth, D.v.Z. "September 1990." Description based on title screen as viewed on December 18, 2009. DTIC Descriptor(s): Frequency, Space Systems, Real Time, Theses, Artificial Satellites, International, Naval Equipment, Space Missions. DTIC Identifier(s): Military Satellites, Research Management, Frequency Allocation, Licensing, PANSAT(Petite Amateur Navy Satellite), Radiofrequency, Regulations, Naval Equipment, Theses. Author(s) subject terms: PANSAT, satellite licensing, satellite design considerations. Includes bibliographical references (p. 145-148). Also available in print.
Vachier, Frédéric. "Étude dynamique des satellites proches des planètes et des petites planètes." Observatoire de Paris (1667-....), 2004. https://hal.science/tel-02095286.
Повний текст джерелаPayne, Robert Andrew, and Randy Lee Wight. "Applications of the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/37410.
Повний текст джерелаOverstreet, Paul J. "Environmental testing of the Petite Amateur Navy Satellite (PANSAT)." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA342298.
Повний текст джерела"December 1997." Thesis advisor(s): Dan Sakoda, I. Michael Ross. Includes bibliographical references (p. 67). Also available online.
Brown, Arnold O. "Communications subsystem for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA275532.
Повний текст джерелаSusbielle, Guillaume. "Perturbation de la dynamique de l’hétérochromatine par des ligands synthétiques du petit sillon de l’ADN." Toulouse 3, 2006. http://www.theses.fr/2006TOU30109.
Повний текст джерелаThe satellite III sequences (SATIII) composing the pericentric regions of the X chromosome are the only alphoïd sequences found in Drosophila melanogaster. They are similar to those found near the centromeres of mammalian cells. Their structural characteristics, based on their biased, A•T rich, nucleotidic composition, make them good targets for different types of artificial and natural molecules. We propose to use the SAT III sequences as a model to study the histone code, the function of pericentric regions and as a tool to evaluate the pharmacological potential of diamidines. Our work with minor groove binding agents, allowed us to shed light on the functional role of topoisomerase II, a major target in anticancer and antiparasitic therapies, in the heterochromatin assembly process and in the antiproliferative mode of action of diamidines
Tobin, Stephen M. "Construction and testing of an 80C86 based communications controller for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA243722.
Повний текст джерелаThesis Advisor(s): Cotton, Mitchell L. Second Reader: Lee, Chin-Hwa. "December 1990." Description based on title screen as viewed on March 30, 2010. DTIC Descriptor(s): Artificial Satellites, Computer Communications, Students, Theses, Paper, Vehicles, Learning, Circuit Testers, Naval Equipment, Requirements, Control, Reliability Author(s) subject terms: Satellite Communications, Satellite Microprocessors. Includes bibliographical references (p. 91-93). Also available in print.
Severson, Fred J. "An overview of the Petite Amateur Navy Satellite (PANSAT) project." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA307066.
Повний текст джерела"December 1995." Thesis advisor(s): I.M. Ross, Daniel Sakoda, Todd Morris. Includes bibliographical references. Also available online.
Alldridge, David W. "Critical failure mode analysis of the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA303881.
Повний текст джерела"September 1995." Thesis advisor(s): Barry Leonard. Includes bibliographical references. Also available online.
Cuff, Daniel J. "Lifetime and reentry prediction for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283366.
Повний текст джерелаFord, Teresa Owen. "Preliminary flight software specification for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA280068.
Повний текст джерелаCalvert, Thomas C. "Computer interface development for the Petite Amateur Navy Satellite (PANSAT) simulator." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA293263.
Повний текст джерелаMaymí, Fernando J. "A sockets application programming interface for the Petite Amateur Naval Satellite." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA381016.
Повний текст джерелаMaymi, Fernando J. "A sockets application programming interface for the Petite Amateur Naval Satellite." Thesis, Monterey, California. Naval Postgraduate School, 2000. http://hdl.handle.net/10945/9295.
Повний текст джерелаAshe, John Douglas, and Randy Lee Wight. "Petite Amateur Naval Satellite Spacecraft Digital Control System: a hardware design." Thesis, Monterey, California: Naval Postgraduate School, 1993. http://hdl.handle.net/10945/24213.
Повний текст джерелаLahti, Carl Andrew. "The design of the radio frequency (RF) subsystem printed circuit boards for the Petite Amateur Navy Satellite (PANSAT)." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA333403.
Повний текст джерелаThesis advisors, Randy L. Borchardt, Rudlof Panholzer. Includes bibliographical references (p. 99). Also available online.
Leu, David L. "Preliminary digital control system design for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA282804.
Повний текст джерелаDavinic, Nicholas M. "Evaluation of the thermal control system of the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA304490.
Повний текст джерелаHorning, James Anthony. "System controller hardware and embedded software for the Petite Amateur Navy Satellite (PANSAT)." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA333881.
Повний текст джерелаThesis advisors, Rudolf Panholzer, Randy L. Wight. Includes bibliographical references (p. 289-290). Also available online.
Sakoda, Daniel J. "Structural design, analysis, and modal testing of the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/24048.
Повний текст джерелаHiser, James K. "Design of a reliable computing system for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26978.
Повний текст джерелаHunter, George Kenneth. "The design and implementation of the Petite Amateur Naval Satellite (PANSAT) user services software." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA345676.
Повний текст джерелаRich, Markham K. "A systems analysis and project management plan for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA285968.
Повний текст джерелаThesis advisor(s): I. M. Ross. "September 1994." Bibliography: p. 146. Also available online.
Karapinar, Ercument. "Modification and verification of an antenna design for Petite Amateur Navy Satellite (PANSAT) using NEC." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA302829.
Повний текст джерелаGannon, Brian Bernard. "Design and analysis of the launch vehicle adapter fitting for the Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA289693.
Повний текст джерелаThesis advisor(s): Sandra L. Scrivener. "September 1994." Includes bibliographical references. Also available online.
Fritz, Thomas M. "A biphase shift keying (BPSK), direct sequence, spread spectrum modem for Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23556.
Повний текст джерелаThe development of a bi-phase shift keying (BPSK), direct sequence, spread spectrum modem is conducted for the purpose of creating a prototype design to be implemented in the Petite Amateur Navy Satellite (PANSAT). The design discussion includes the hardware used in the functional realization of a working design. The design itself encompasses selection of components and demonstrates (through circuit diagrams and waveforms produced) that the preliminary operational characteristics of a spread spectrum BPSK modulation scheme for PANSAT have been achieved. Limited performance analysis is conducted through IF loop-back testing and provides the intermediate and output demodulator waveforms. The development of the final version operating at the specified radio frequency (RF) is not conducted, but the discussion provides proof of concept.
Perrain, David. "Le tourisme dans les petites économies insulaires : analyse des fondamentaux de la spécialisation touristique comme source soutenable de croissance." Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0015/document.
Повний текст джерелаTourism has become a social, cultural and economic phenomenon. However, the impact of tourism on a long-term economy growth remains ambiguous, especially for small island economies (SIE).This thesis seeks to identify the fundamentals of tourism specialization as a sustainable source of growth for a SIE. On the one hand, it has led us to redefine the main components of tourism as a social and economic activity and to clarify how tourism contributes to the economic growth. On the other hand, this thesis reveals the ambiguity of the relationship between tourism and growth. It provides new explanations for a more virtuous tourism growth model and more adapted to the global tourism market.The results of the introduction of tourism into a Romer's model of endogenous growth and those of a threshold regression model applied to a sample of SEI call into question the hypothesis of linearity between tourist specialization and economic growth. The thesis demonstrates the end of a model of intensive tourist development. It concludes that tourism is a sustainable source of growth for an SIE, when intelligence and agility constitute the leitmotif of a sustainable, multi-stakeholder tourism strategy
Susbielle, Guillaume. "PERTURBATION DE LA DYNAMIQUE DE L'HETEROCHROMATINE PARDES LIGANDS SYNTHETIQUES DU PETIT SILLON DE L'ADN." Phd thesis, Université Paul Sabatier - Toulouse III, 2006. http://tel.archives-ouvertes.fr/tel-00107105.
Повний текст джерелаchromosome X sont les seules séquences satellites alphoïdes chez la drosophile,
similaires à celles retrouvées autour du centromère chez les mammifères. Leurs
caractéristiques structurales liées à leur composition nucléotidique A•T riche en font
des cibles pour différentes classes de molécules artificielles. Nous proposons
d'utiliser le modèle des SATIII de la drosophile pour améliorer notre compréhension
du code des histones, de la fonction des régions péricentriques ainsi que pour
l'évaluation du potentiel pharmacologique des diamidines. Nos travaux à l'aide de
ligands du petit sillon nous ont permis de mettre en évidence un rôle de la
topoïsomérase II, une cible thérapeutique majeure, dans l'assemblage de
l'hétérochromatine et dans le mode d'action antiprolifératif des diamidines.
Oechsel, Craig R. "Implementation of error detection and correction (EDAC) in the Static Random Access Memory (SRAM) aboard Petite Amateur Navy Satellite (PANSAT)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA297723.
Повний текст джерелаRichard, Manon. "Clusters de gènes de résistance aux maladies chez le haricot commun : bases moléculaires, régulation et évolution." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112401.
Повний текст джерелаCommon bean is the main source of protein for human consumption in many developing countries. Several huge disease resistance (R) gene clusters have been mapped at the end of common bean linkage groups. The common bean genome (Andean genotype G19833) has recently been sequenced. Access to the complete genome sequence of common bean allowed us to annotate the Nucleotide Binding-Leucine Rich Repeat (NL) encoding gene family, the prevalent class of disease R genes in plants, and to perform the 3 following studies: (i) We have investigated the molecular basis of Co-x, an anthracnose R gene to a highly virulent strain of C. lindemuthianum, previously identified in the Andean cultivar JaloEEP558. Fine mapping of Co-x and sequencing of the target region in JaloEEP558, allowed us to identify a candidate gene encoding an atypical kinase. We hypothesised that this atypical kinase is a fungal effector target. (ii) Several recent studies have highlighted the role of small RNA (miRNAs that triggered phased siRNAs production) in the regulating of NL gene expression. Analyses of small RNAs libraries of common bean led to the identification of this mechanism in common bean and also allowed us to propose a new NL regulation pathway involving 24 nt sRNAs. (iii) We have studied centromeric and subtelomeric satellite DNAs at common bean genome level. We have identified 2 different satellite DNAs in common bean centromeres, Nazca and CentPv2. We have also conducted the analyze of the subtelomeric satellite khipu, previously identified in common bean R clusters and confirmed that frequent sequence exchange occurs between non-homologous chromosome ends in common bean genome. Together, these results led us to propose that both structural elements and a combination of regulatory mechanisms (TGS, PTGS) allow the amplification of NL sequences without detrimental effect for the plant leading to the large NL clusters observed in common bean
Bekkar, Mohammed. "Formation de voies hybride analogique-numérique pour la réduction d'interférences dans les réseaux cellulaires de nouvelle génération." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT007.
Повний текст джерелаBeamforming is a signal processing method used in antenna arrays, allowing to enhance directions of emission or reception of signals by controlling the different elements.In mobile networks especially, it allows interference reduction in base stations.Its full digital impementation is limited by energy consumption and cost when increasing the number of antennas.As a response, hybrid analog-digital implementation could be used to reduce the number of radiofrequency (RF) chains as well as the number of analog-to-digital converters.In this implementation, the analog stage could be realised using different types of devices (phase shifters, amlifiers/attenuators, variable impedances) and with a variable connectivity to the antenna array.Nevertheless, if we want to keep a simple RF circuitry by using phase shifters only to tune the analog beamformer, the problem of optimising these weights becomes non-convex.The current works on small cell networks show that the interference between base station is one of the limiting factors of the coverage and the datarate.Furthermore, in a full digital implementation, the presence of strong blockers leads to analog-to-digital converters saturation or desensitization.The purpose of this work is the study of hybrid beamforming with phase-only implementation, as well as to propose an algorithm to compute the beamforming matrices, to reduce the received interference in a small cell.After a description and a state-of-the-art, we preliminarily proposed an interference characterization using an algebraic angle between the signals of interest vectors and the interference vectors, which allowed us to obtain a lower bound on the SINR performance of the optimal beamformer.We have then proposed a sub-optimal solution of hybrid phase-only beamforming, which when using an infinite resolution digitization, has a low loss as compared to a solution using modulus and phase.Secondly, we introduced an analog-to-digital converter model, which allowed us to bring out the limitations of the first appproach as well as of the full digital implementation, in the presence of strong blockers.Afterwards, we proposed an optimisation algorithm of the analog stage, based on a semidefinite relaxation.The peroformance of this algorithm, in terms of SINR and sumrate are close to the benchmark with full degree of freedom, modulus and phase.In comparison, the performance state-of-the-art tested solutions using non-convex cost function are lower and depend on initialization point
Sakic-Kieffer, Pierre. "Apport de la géodésie fond de mer à l’évaluation de l’aléa sismique côtier : distancemétrie en mer de Marmara et simulation de GNSS/A aux Antilles." Thesis, La Rochelle, 2016. http://www.theses.fr/2016LAROS018/document.
Повний текст джерелаMore than 70 % of the Earth surface is covered by seas and oceans. Several tectonic phenomena, among the most devastating, take place in ocean environment. For example, the subduction zones, which can generate mega-earthquakes associated with devastating tsunamis (Sumatra in 2004, Tōhoku in 2011), but also the underwater strike-slip faults. In many cases, methods of space geodesy cannot discriminate between a blocked or aseismic behavior, because the instruments are located too far from the area potentially deformed by the tectonic process. Thus, it is necessary to develop new techniques to extend conventional observation networks off-shore to map the deformation in the entire area. This thesis focuses on two seafloor geodesy methods, in order to assess the seismic risk evaluation. The first is the relative acoustic ranging, with an efective deployment of the Marmara Sea area. Our early results suggest a locked state at the segment of the North Anatolian fault of İstanbul. The second area considered is the Caribbean subduction. The working scale requires localization of the observed points in a global reference frame. We study ocean processes to consider, and detail a GNSS/A (Acoustic) methodology, consisting of acoustic interrogations from a precisely GNSS positioned surface platform, for a future absolute positioning experience of Guadeloupe