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Dissertations / Theses on the topic 'Satellites en Rotation'

Author: Grafiati
Published: 8 February 2025
Last updated: 31 July 2025

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1

Cottereau, Laure. "Etude complète de la rotation d'un corps triaxial : application à Vénus et à Phoebe." Paris 6, 2011. http://www.theses.fr/2011PA066261.

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Cette thèse a pour sujet l'étude des mouvements de rotation des corps dits triaxiaux, qui ne sont pas seulement aplatis comme la Terre, mais qui s'écartent aussi de la symétrie axiale. Nous commençons par construire une théorie analytique fondée sur un formalisme Hamiltonien, que nous appliquons ensuite à deux corps triaxiaux : la planète Vénus et le neuvième satellite de Saturne, Phoebe. Ceci nous permet de déterminer pour la première fois leurs coefficients de précession-nutation en longitude et en obliquité. On présente aussi les caractéristiques du mouvement libre de Vénus. Puis nous rééva
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2

Robertson, Michael James. "Command Generation for Tethered Satellite Systems." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6921.

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Command generation is a process by which input commands are constructed or modified such that the system's response adheres to a set of desired performance specifications. Previously, a variety of command generation techniques such as input shaping have been used to reduce residual vibration, limit transient deflection, conserve fuel or adhere to numerous other performance specifications or performance measures. This dissertation addresses key issues regarding the application of command generation techniques to tethered satellite systems. The three primary objectives of this research are as
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3

Evans, Joshua L. "SMALL SATELLITE NONCOMMUTATIVE ROTATION SEQUENCE ATTITUDE CONTROL USING PIEZOELECTRIC ACTUATORS." UKnowledge, 2016. http://uknowledge.uky.edu/ece_etds/91.

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Attitude control remains one of the top engineering challenges faced by small satellite mission planning and design. Conventional methods for attitude control include propulsion, reaction wheels, magnetic torque coils, and passive stabilization mechanisms, such as permanent magnets that align with planetary magnetic fields. Drawbacks of these conventional attitude control methods for small satellites include size, power consumption, dependence on external magnetic fields, and lack of full control authority. This research investigates an alternative, novel approach to attitude-control method fo
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4

Debes, John H., Charles A. Poteet, Hannah Jang-Condell, et al. "Chasing Shadows: Rotation of the Azimuthal Asymmetry in the TW Hya Disk." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/623947.

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We have obtained new images of the protoplanetary disk orbiting TW Hya in visible, total intensity light with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST), using the newly commissioned BAR5 occulter. These HST/STIS observations achieved an inner working angle of similar to 0."2, or 11.7 au, probing the system at angular radii coincident with recent images of the disk obtained by ALMA and in polarized intensity near-infrared light. By comparing our new STIS images to those taken with STIS in 2000 and with NICMOS in 1998, 2004, and 2005, we demonstrate that
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5

Ning, Zuoli. "Roles of plate locking and block rotation in the tectonics of the Pacific Northwest /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/6833.

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6

Astoul, Aurélie. "Impact du magnétisme et de la rotation différentielle sur les marées dans les étoiles de faible masse et les planètes géantes gazeuses." Thesis, Université de Paris (2019-....), 2020. http://www.theses.fr/2020UNIP7073.

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Plus de 4000 exoplanètes ont été découvertes au cours de ces 25 dernières années, pour la plupart en orbite autour d’étoiles de faible masse. Dans les systèmes planétaires à très courte période orbitale, les interactions de marée étoile-planète sont connues pour gouverner l’évolution tardive de l’architecture orbitale des systèmes et de la rotation de leur étoile hôte, comme c’est aussi le cas dans les systèmes serrés planète-satellite(s) de notre système solaire tels que les systèmes jovien et saturnien. Les temps caractéristiques de variation des paramètres orbitaux et de rotation des corps,
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7

Kulick, Wayne J. "Development of a Control Moment Gyroscope controlled, three axis satellite simulator, with active balancing for the bifocal relay mirror initiative." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Dec%5FKulick.pdf.

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8

LOYER, SYLVAIN. "Techniques dynamiques d'observation de la rotation de la terre mesures satellites et apports des gravimetres et des gyroscopes." Toulouse 3, 1997. http://www.theses.fr/1997TOU30269.

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Les variations de l'orientation de la terre dans l'espace sont aujourd'hui mesurees par differentes techniques astrometriques ; radio-interferometrie a tres longue base, tirs lasers sur la lune, et mesures de positionnement des satellites artificiels. Les parametres de rotation de la terre, utilises pour decrire les variations d'orientation sont determines avec une precision inferieure a 1 milliseconde de degre, et une resolution temporelle de 1 jour. Nous presentons les resultats de mesure des variations a courte periode de l'orientation (variations diurnes et subdiurnes) et nous montrons com
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9

Coulot, David. "Télémétrie laser sur satellites et combinaison de techniques géodésiques : contributions aux systèmes de référence terrestres et applications." Phd thesis, Observatoire de Paris, 2005. http://tel.archives-ouvertes.fr/tel-00069016.

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La qualité actuelle des techniques de Géodésie Spatiale permet d'estimer des séries temporelles de produits géodésiques tels que les paramètres de rotation et les positions de stations terrestres. Ces nouveaux produits doivent être utilisés dans la matérialisation des Systèmes de Référence Terrestres, en constantes évolution et amélioration. Ils doivent aussi mettre en évidence les phénomènes, globaux ou locaux, régissant la rotation terrestre et les mouvements de la croûte. C'est dans ce contexte riche d'enjeux divers que s'inscrivent ces travaux. Leur but premier a été l'élaboration et l'app
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10

Coulot, David. "Télémétrie laser sur satellites et combinaison de techniques géodésiques : contributions aux systèmes de référence terrestres et applications." Phd thesis, Observatoire de Paris (1667-....), 2005. https://theses.hal.science/tel-00069016.

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La qualité actuelle des techniques de géodésie spatiale permet d'estimer des séries temporelles de produits géodésiques tels que les paramètres de rotation et les positions de stations terrestres. Ces nouveaux produits doivent être utilisés dans la matérialisation des systèmes de référence terrestres, en constantes évolution et amélioration. Ils doivent aussi mettre en évidence les phénomènes, globaux ou locaux, régissant la rotation terrestre et les mouvements de la croûte. C’est dans ce contexte riche d’enjeux divers que s’inscrivent ces travaux. Leur but premier a été l’élaboration et l’app
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11

Bourda, Géraldine. "Rotation terrestre et Variations du champ de gravité : Etude et apport des missions CHAMP et GRACE." Phd thesis, Observatoire de Paris, 2004. http://tel.archives-ouvertes.fr/tel-00008286.

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La distribution des masses à l'intérieur de la Terre régit la vitesse de rotation terrestre, ainsi que le comportement de l'axe de rotation terrestre dans la Terre, et dans l'espace. Ces distributions de masses peuvent être mesurées depuis l'espace grâce aux satellites artificiels, dont l'orbitographie donne accès à la détermination du champ de gravité terrestre. Par conséquent, les variations temporelles du champ de gravité peuvent être reliées aux variations des paramètres d'orientation terrestre (via le tenseur d'inertie). Des progrès considérables ont été effectués ces dernières années dan
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12

De, Oliveira Valente Moreno Rodrigues Ricardo. "Modélisation, commande robuste et analyse de missions spatiales complexes, flexibles et non stationnaires." Electronic Thesis or Diss., Toulouse, ISAE, 2024. http://www.theses.fr/2024ESAE0062.

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La complexité des missions spatiales a augmenté de façon exponentielle, avec des exigences croissantes en matière de performance, de précision et de robustesse. Cette évolution est due à la fois aux progrès technologiques et à la nécessité de satisfaire de nouveaux défis, tels que les satellites en rotation (spinnés), l'assemblage en orbite et le service en orbite. Ces missions nécessitent l'intégration de systèmes mécaniques complexes, notamment des réservoirs de carburant liquide et ballotant, des systèmes de pointage précis et des structures flexibles qui présentent généralement des modes à
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13

Moore, Terry. "Satellite laser ranging and the determination of earth rotation parameters." Thesis, University of Nottingham, 1986. http://eprints.nottingham.ac.uk/13312/.

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Over recent years considerable advances have taken place in the field of space geodesy, resulting in a number of highly precise global positioning techniques. The increased resolution of many of the scientific products from the new observational techniques has stimulated the interest of not only geodesists but also geophysicists. Furthermore, their potential to determine the orientation of the earth's axis of rotation (polar motion) and the variations of the rate of rotation of the earth about that axis, was recognised by the scientific community. The result was the establishment of Project ME
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14

Bois, Eric. "Théorie analytique de la rotation d'un satellite artificiel : application à Hipparcos." Observatoire de Paris, 1987. https://hal.archives-ouvertes.fr/tel-02149314.

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Cette thèse présente une théorie analytique de l'évolution d'attitude d'un satellite artificiel en rotation perturbée. La contrainte principale est celle d'une rotation lente fortement perturbée avec l'axe pointant loin d'une position d'équilibre. De plus les trois axes d'inertie du satellite peuvent être inégaux. Une solution formelle est développée au deuxième ordre suivant les puissances d'un petit paramètre caractéristique de l'ordre de grandeur des couples perturbateurs et la théorie peut convenir quelles que soient les forces perturbatrices intérieures ou extérieures susceptibles de crée
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15

Bois, Eric. "Théorie analytique de la rotation d'un satellite artificiel application à Hipparcos /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37603088b.

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16

McNally, Ian J. "Orbital and rotational dynamics of solar power satellites in geosynchronous orbits." Thesis, University of Glasgow, 2018. http://theses.gla.ac.uk/30628/.

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Designs for geostationary (GEO) solar power satellites (SPS) are extremely large in scale, more than one order of magnitude larger than the International Space Station. In this thesis a detailed study of the orbit dynamics of SPS is performed. Analytical equations, derived by the process of averaging of the SPS equations of motion, are used to determine the long-term orbital evolution. Previous SPS studies have simply assumed a GEO as the operational orbit, and then designed control systems for maintaining the orbit within acceptable nominal values. It is found that an alternative SPS orbital
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17

Erturk, Alp. "Rotation, Scale And Translation Invariant Automatic Target Recognition Using Template Matching For Satellite Imagery." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611434/index.pdf.

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In this thesis, rotation, scale and translation (RST) invariant automatic target recognition (ATR) for satellite imagery is presented. Template matching is used to realize the target recognition. However, unlike most of the studies of template matching in the literature, RST invariance is required in our problem, since most of the time we will have only a small number of templates of each target, while the targets to be recognized in the scenes will have various orientations, scaling and translations. RST invariance is studied in detail and implemented with some of the competing methods in the
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18

Duffaut, Yvan. "Calcul des modes d'oscillations d'un liquide dans un réservoir de satellite stabilisé par rotation." Paris 6, 1994. http://www.theses.fr/1994PA066813.

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19

Ceillier, Tugdual. "Dynamisme stellaire : activité et rotation des étoiles de type solaire observées par le satellite Kepler." Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC173.

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Cette thèse porte sur la rotation et l'activité magnétique des étoiles sismiques de type solaire. Nous utilisons les données provenant du satellite Kepler pour étudier l'histoire rotationnelle d'étoiles de type solaire. Dans un premier temps, nous présentons le contexte de l'astérosismologie. Nous décrivons ensuite l'outil de mesure de la rotation que nous avons développé durant cette thèse. Nous le comparons aux autres méthodes utilisées et montrons que ses performances sont excellentes. Dans un deuxième temps, nous appliquons cet outil à 500 étoiles de type solaire en séquence principale et
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20

Couhert, Alexandre. "Amélioration des références massiques de la Terre par synergie entre différentes mesures de géodésie spatiale : Application à l'océanographie par altimétrie spatiale." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30242.

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Dans le contexte du changement climatique mondial et la nécessité d'étudier les conséquences de l'ampleur de la fonte des glaces continentales sur le niveau des mers ainsi que sur la répartition des masses fluides à l'échelle du globe, notre travail de thèse s'intéresse aux phénomènes à très grande échelle qui modifient la forme de la Terre, son champ de gravité et l'équilibre de sa rotation. Il se focalise sur la stratégie à mettre en place pour observer et modéliser des variations très fines sur des termes géodynamiques (coefficients de bas degrés) qui sont encore aujourd'hui mal connus, et
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21

Silva, William Reis. "Estudo da estabilidade do movimento rotacional de satélites artificiais com variáveis canônicas /." Guaratinguetá : [s.n.], 2012. http://hdl.handle.net/11449/91811.

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Resumo: Este trabalho tem por objetivo analisar a estabilidade do movimento rotacional de satélites arti…ciais simétricos (com dois momentos principais de inércia iguais), em órbita circular, sob a in‡uência do torque de gradiente de gravidade, usando as variáveis de Andoyer. O método utilizado neste trabalho para analisar a estabilidade é o teorema de Kovalev e Savchenko,o qual requer a redução da Hamiltoniana na forma normal até quarta ordem, por meio de transformações canônicas em torno dos pontos de equilíbrio. Os coe…cientes da Hamiltoniana normal são indispensáveis no estudo da estabilid
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22

Bloßfeld, Mathis [Verfasser], Urs [Akademischer Betreuer] Hugentobler, Markus [Akademischer Betreuer] Rothacher, and Florian [Akademischer Betreuer] Seitz. "The key role of Satellite Laser Ranging towards the integrated estimation of geometry, rotation and gravitational field of the Earth / Mathis Bloßfeld. Gutachter: Urs Hugentobler ; Markus Rothacher ; Florian Seitz. Betreuer: Urs Hugentobler." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1067233350/34.

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23

Simal, Moreira Leonardo. "Variáveis canônicas não singulares e o movimento rotacional de satélites artificiais /." Guaratinguetá : [s.n.], 2006. http://hdl.handle.net/11449/91834.

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Orientador: Maria Cecília F. P. S. Zanardi<br>Banca: Rodolpho Vilhena de Moraes<br>Banca: Sandro da Silva Fernandes<br>Resumo: A atitude de um satélite artificial representa sua orientação no espaço, de modo que através da atitude pode-se conhecer a orientação espacial do satélite pela relação entre dois sistemas de coordenadas, um dels fixo no corpo do setélite e o outro associado com umsistema de referência inercial. Apesar da atitude ser bem representada por vários conjuntos de variáveis, todos estes apresentam limitações em sua utilização. Focaliza-se neste trabalho um conjunto de variávei
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24

Silva, William Reis [UNESP]. "Estudo da estabilidade do movimento rotacional de satélites artificiais com variáveis canônicas." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/91811.

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Made available in DSpace on 2014-06-11T19:25:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-02-17Bitstream added on 2014-06-13T18:53:33Z : No. of bitstreams: 1 silva_wr_me_guara.pdf: 3841200 bytes, checksum: 6e12b3164a3b71bbd421d41f3c3dc760 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Este trabalho tem por objetivo analisar a estabilidade do movimento rotacional de satélites arti ciais simétricos (com dois momentos principais de inércia iguais), em órbita circular, sob a in uência do torque de gradiente de gravidade, usando as variáveis de Andoye
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25

Simal, Moreira Leonardo [UNESP]. "Variáveis canônicas não singulares e o movimento rotacional de satélites artificiais." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/91834.

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Made available in DSpace on 2014-06-11T19:25:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-06Bitstream added on 2014-06-13T20:27:37Z : No. of bitstreams: 1 simalmoreira_l_me_guara.pdf: 2039741 bytes, checksum: 40e1e56a7f2c21c69823f17d854f8994 (MD5)<br>Universidade Estadual Paulista (UNESP)<br>A atitude de um satélite artificial representa sua orientação no espaço, de modo que através da atitude pode-se conhecer a orientação espacial do satélite pela relação entre dois sistemas de coordenadas, um dels fixo no corpo do setélite e o outro associado com umsistema de referência inerci
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26

Скиданенко, Максим Сергійович, Максим Сергеевич Скиданенко та Maksym Serhiiovych Skydanenko. "Гідромеханічні показники пристроїв для отримання монодисперсних крапель та гранул". Thesis, СумДУ, 2014. http://essuir.sumdu.edu.ua/handle/123456789/37916.

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Дисертаційна робота присвячена теоретичним та експериментальним дослідженням гідродинаміки процесу диспергування рідини при мимовільних і вимушених коливаннях, що виникають на поверхні струменя, що дасть можливість підвищити монодисперсність продукту, отриманого за допомогою обертового вібраційного гранулятора. Експериментально досліджено гідродинаміку витікання струменя і факторів, які впливають на режими його розпаду. Запропоновано аналітичні рівняння, які дозволяють аналізувати процес диспергування струменя. Отримані рівняння регулярного розпаду струменя, що дає можливість доповнити методик
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27

Cardoso, dos Santos Josué. "Study of the dynamics around celestial bodies using analytical and semi-analytical techniques." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/155950.

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Submitted by Josué Cardoso dos Santos (josuesantosunesp@gmail.com) on 2018-09-10T18:36:37Z No. of bitstreams: 1 Tese_Final_Josue_Cardoso_Santos.pdf: 78449557 bytes, checksum: 4515b9cb7cc346753f7e9682b8e037de (MD5)<br>Approved for entry into archive by Pamella Benevides Gonçalves null (pamella@feg.unesp.br) on 2018-09-10T18:47:05Z (GMT) No. of bitstreams: 1 santos_jc_dr_guara.pdf: 78449557 bytes, checksum: 4515b9cb7cc346753f7e9682b8e037de (MD5)<br>Made available in DSpace on 2018-09-10T18:47:05Z (GMT). No. of bitstreams: 1 santos_jc_dr_guara.pdf: 78449557 bytes, checksum: 4515b9cb7cc346753f7e96
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Tseng, Chien-Hung, and 曾建鴻. "Study on the Rotation Mechanism of Satellite Antenna." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/22748479169676206549.

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碩士<br>國立交通大學<br>工學院精密與自動化工程學程<br>100<br>For satellite antennas, this thesis mainly deals with spin mechanism design and speed control of an antenna in a radiometer to make sure it under stable operation is able to obtain measurement data. The spin mechanism of the satellite antenna involves vehicle payload, space constraints and extreme environment to drive payload at constant speed. During its mission, the radiometer itself has to rotate at the speed rate of 30rpm. Since the running between the box and the reflector has movable and immovable components, the signals delivery and spin mechanism
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29

Lee, Meng-Hsiu, and 李孟修. "Rotating Mechanism Control of Satellite Antenna." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/47743073632592193240.

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碩士<br>國立交通大學<br>機械工程學系<br>100<br>For satellite antennas, this thesis mainly deals with spin mechanism design and controls the spin rate of antennas in a radiometer. Based on communication or mission requirements, every satellite antenna has its own standard. Considering vehicle payload and space constraints, we need to fold the antenna before launch. After launching the satellite into an orbit, we will control the antenna attitude. During its mission, the radiometer itself has to rotate. Since the running between the box and the reflector has a lot of movable and immovable components, spin mec
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30

Chen, Yen-ju, and 陳嬿如. "Typhoon Quantitatiive Precipitation Forecast with Satellite-Derived Rotation and Intensity Variation of Tropical Cyclone." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/88657780357045957480.

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碩士<br>國立中央大學<br>大氣物理研究所<br>95<br>In recent year, the damages caused by typhoons are more and more serious.The heavy rainfall from typhoons often causes inland flooding and mudslides that threaten lives and property which affect the livelihood of people. One of the most important areas of typhoon research focuses on the quantitative prediction of a typhoon’s precipitation. The forecasting from American agencies use the TRaP method to predict a hurricane’s accumulated rainfall for the next 24 hours. This technique is considered fast and practical. The main purpose of this study is to also ap
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31

Huang, Jian-Syuan, and 黃建軒. "Design of dual-circular polarization antenna array using sequential rotation for Ka-band satellite communication." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/kxxf2b.

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碩士<br>國立臺灣大學<br>電信工程學研究所<br>106<br>In this thesis, a Ka-band dual-circular polarization sequential antenna array design is proposed. The dual-circular polarization antenna element is a square microstrip patch antenna using dual probe-fed. In order to generate circular polarized wave, a compact 3 dB branch line coupler is used. Both microstrip lines with fractal design and open stub matched transmission line are applied to the propose dual-circular polarization sequential antenna array to minimize coupler size. In generally, sequential design can be used to maintain wide-band axial ratio respon
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32

Ojakangas, Gregory Wayne. "I. Episodic volcanism of tidally heated satellites with an application to Io. II. Thermal state of an ice shell on Europa. III. Polar wander of a synchronously rotating satellite with an application to Europa." Thesis, 1988. https://thesis.library.caltech.edu/5302/1/Ojakangas_gw_1988.pdf.

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Two examples of planetary bodies that may have coupled thermal and dynamical evolutions are investigated. The work is presented in three individual papers. The first example is that of a tidally heated satellite in an orbital resonance, for which the tidal dissipation rate is a strongly increasing function of the internal temperature. For such a satellite, a feedback mechanism exists between the orbital and thermal energies, which may lead to periodic variations in tidal heating within the satellite and its orbital eccentricity. A simple model of this mechanism is presented in the first pap
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33

Heffernan, Natalie F. "A multibody dynamic analysis of the N-ROSS satellite rotating flexible reflector using Kane's method." Thesis, 1987. http://hdl.handle.net/10945/22373.

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34

Gigliotti, Deanna. "Cell and molecular analysis of intra-operative supraspinatus muscle from patients with rotator cuff injury." 2015. http://hdl.handle.net/1993/30793.

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Rotator cuff injury is a debilitating condition and when injury cannot be managed through non-operative procedures, surgery is required. To determine explanations for the failure of surgery to restore joint function, human muscle biopsies of supraspinatus were studied compared to deltoid. Histology showed atrophy and a tendency toward fibrosis/fatty infiltration in injured supraspinatus. Findings from AChR-subunit western blot and Sema3A localization around satellite cells suggest supraspinatus denervation. Nucleotide incorporation to quantify satellite cell activation in culture showed a sign
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