Дисертації з теми "Orbital contribution"
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Thery, Vincent. "Contribution à la modélisation de la réactivité dans les macromolécules biologiques." Nancy 1, 1993. http://www.theses.fr/1993NAN10262.
Повний текст джерелаFlegel, Sven [Verfasser], and Peter [Akademischer Betreuer] Vörsmann. "Multi-Layer Insulation as Contribution to Orbital Debris / Sven Flegel ; Betreuer: Peter Vörsmann." Braunschweig : Technische Universität Braunschweig, 2013. http://d-nb.info/1175820849/34.
Повний текст джерелаCaillau, Jean-Baptiste. "Contribution à l'étude du contrôle en temps minimal des transferts orbitaux." Phd thesis, Toulouse, INPT, 2000. http://oatao.univ-toulouse.fr/7303/1/caillau.pdf.
Повний текст джерелаCaillau, Jean-Baptiste Noailles Joseph. "Contribution à l'étude du contrôle en temps minimal des transferts orbitaux." Toulouse : INP Toulouse, 2005. http://ethesis.inp-toulouse.fr/archive/00000133.
Повний текст джерелаDujol, Romain Noailles Joseph. "Contribution à l'étude du contrôle optimal des transferts orbitaux mono-entrée." Toulouse : INP Toulouse, 2006. http://ethesis.inp-toulouse.fr/archive/00000336.
Повний текст джерелаTakada, Shigeki. "Contribution of Endothelial-to-Mesenchymal Transition to the Pathogenesis of Human Cerebral and Orbital Cavernous Malformations." Kyoto University, 2018. http://hdl.handle.net/2433/232474.
Повний текст джерелаDenguir, Mohsen. "Contribution à l'étude numérique du problème de la synthèse optimale : application au problème du transfert orbital." Toulouse, INPT, 2001. http://www.theses.fr/2001INPTA09H.
Повний текст джерелаUrrea, Onate Eleuterio Claudio. "Contribution to the problem of orbital stabilization : application to a five degrees of freedom underactuated robot." Grenoble INPG, 2003. http://www.theses.fr/2003INPG0143.
Повний текст джерелаWei, Wenlong. "Contribution à l'étude et la conception d'antennes pour la génération d'ondes radiofréquences transportant du moment angulaire orbital." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S048/document.
Повний текст джерелаIt is well known from Maxwell’s theory that electromagnetic (EM) radiation carries both linear momentum (energy) and angular momentum. The latter has two parts: Spin Angular Momentum (SAM) which corresponds to the polarization of an EM wave and Orbital Angular Momentum (OAM) which is associated with the spatial distribution of an EM wave. The SAM has only two states (left and right) and is used to double the channel capacity in telecommunications. On the other hand, the OAM can theoretically have an infinite number of states called the OAM modes. Therefore, the first applications of OAM have been proposed in wireless communications at radio frequencies. However, first of all, it is necessary to develop the antennas for generating such waves. The objective of this thesis is to design the antennas for the generation of radio waves bearing OAM. The manuscript contains three parts. In the first part, an antenna using 4 patches and an original phase shifter is developed and tested to generate an OAM wave. In the second part, a Fabry-Perot (FP) cavity is used to enhance the directivity of this antenna. The third part is to generate guided OAM waves. Some horn antennas are used to radiate these waves with good directivity
Lin, Nan. "Application of attosecond pulses to high harmonic spectroscopy of molecules." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-01064138.
Повний текст джерелаDujol, Romain. "Contribution à l'étude du contrôle optimal des transferts orbitaux mono-entrée." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2006. http://tel.archives-ouvertes.fr/tel-00124029.
Повний текст джерелаNombro, Jean-Pierre Arnaud. "The effects of selected orbital environmental factors on painted launcher upper stages and modelling of their contribution to the small size space debris population." Thesis, Queen Mary, University of London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428334.
Повний текст джерелаAndoyer, Henri. "Contribution à la théorie des orbites intermédiaires." Paris : Bibliothèque universitaire Pierre et Marie Curie (BUPMC), 2009. http://jubil.upmc.fr/sdx/pl/toc.xsp?id=TH_000317_001&fmt=upmc&idtoc=TH_000317_001-pleadetoc&base=fa.
Повний текст джерелаGuichard, Vincent. "Etude par spectrometrie raman de resonnance d'amines a l'etat de radical-cation et a l'etat triplet : contribution a l'etude des etats radicalaires et excites des derives benzeniques." Paris 6, 1988. http://www.theses.fr/1988PA066276.
Повний текст джерелаCaillau, Jean-Baptiste. "Contribution a l'etude du controle en temps minimal des transferts orbitaux." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2000. http://tel.archives-ouvertes.fr/tel-00001182.
Повний текст джерелаBertoux, Maxime Louis. "Contribution à l'étude des fonctions cognitives préfrontales médianes et orbitales chez l'homme." Paris 6, 2012. http://www.theses.fr/2012PA066310.
Повний текст джерелаClinical and neuroimaging studies have highlighted the importance of medial prefrontal (mPFC) and orbitofrontal (OFC) cortices in social cognition and emotional processing (Carrington & Bailey, 2008; Rolls & Grabenhorst, 2008; van Overalle, 2009). These data led many authors to suggest that mPFC and OFC provide many of the neural bases of theory of mind, empathy, emotional recognition, reversal-learning, etc. Also, mPFC and OFC are two brain areas that are early impaired in behavioural variant of frontotemporal dementia (bvFTD) (Boccardi et al. , 2005; Perry et al. , 2006), a neurodegenerative disease characterized by apathy, desinhibition, emotional blunting and loss of social conveniences (Piguet et al. , 2011). These dysfunctions seem to be specific to bvFTD regarding other neurodegenerative pattern as in Alzheimer Disease (Tranfaglia et al. , 2009). Thus, if bvFTD cannot be considered as a pure mPFC/COF disease, since the atrophy also progress in dorsolateral PFC, insular and polar temporal cortices, we argue that it can provide a good insight in mPFC/OFC functioning and that it can be a good model of mPFC/OFC impairment (Lu & Cummings, 2006). BvFTD can be a good medium to develop clinical tools assessing these two PFC areas (Zald & Andreotti, 2010) or to demonstrate their implication in experimental neuropsychology paradigms. Through this thesis, our aim was to conceive a cognitive battery in order to assess cognitive functions related to mPFC and OFC. The development of this battery and the investigation of its neural correlates were done through bvFTD and comparatively to its differential diagnoses, on the premise that this disease provides good insight to mPFC and OFC dysfunctions
Shevtsov, Oleksii. "Contribution à la théorie du transport quantique : isolants topologiques à base de graphène et phénomènes à fréquence finie." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00770160.
Повний текст джерелаDefonte, Olivier. "Contributions de l'automatique et du traitement du signal à la navigation autonome en orbite géostationnaire." Nice, 1990. http://www.theses.fr/1990NICE4389.
Повний текст джерелаSeaman, Lani Anne. "Investigation of the 6d and 5f Orbital Contributions in Actinide Complexes Containing Amide, Ketimide, Aryl, and Alkyl Metal-Ligand Bonds." University of California, Santa Barbara, 2013.
Знайти повний текст джерелаMiranda, La Hera Pedro Xavier. "Contributions to Motion Planning and Orbital Stabilization : Case studies: Furuta Pendulum swing up, Inertia Wheel oscillations and Biped Robot walking." Licentiate thesis, Umeå : Umepå universitet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1874.
Повний текст джерелаCanalias, Vila Elisabet. "Contributions to Libration Orbit Mission Design using Hyperbolic Invariant Manifolds." Doctoral thesis, Universitat Politècnica de Catalunya, 2007. http://hdl.handle.net/10803/5927.
Повний текст джерелаEl problema restringit de tres cossos és un model per estudiar el moviment d'un cos de massa infinitessimal sota l'atracció gravitatòria de dos cossos molt massius. Els cinc punts d'equilibri d'aquest model, en especial L1 i L2, han estat motiu de nombrosos estudis per aplicacions pràctiques en les últimes dècades (SOHO, Genesis...).
Genèricament, qualsevol missió en òrbita al voltant del punt L2 del sistema Terra-Sol es veu afectat per ocultacions degudes a l'ombra de la Terra. Si l'òrbita és al voltant de L1, els eclipsis són deguts a la forta influència electromagnètica del Sol. D'entre els diferents tipus d'òrbites de libració, les òrbites de Lissajous resulten de la combinació de dues oscil.lacions perpendiculars. El seu principal avantatge és que les amplituds de les oscil.lacions poden ser escollides independentment i això les fa adapatables als requeriments de cada missió. La necessitat d'estratègies per evitar eclipsis en òrbites de Lissajous entorn dels punts L1 i L2 motivaren la primera part de la tesi. En aquesta part es presenta una eina per la planificació de maniobres en òrbites de Lissajous que no només serveix per solucionar el problema d'evitar els eclipsis, sinó també per trobar trajectòries de transferència entre òrbites d'amplituds diferents i planificar rendez-vous.
Per altra banda, existeixen canals de baix cost que uneixen els punts L1 i L2 d'un sistema donat i representen una manera natural de transferir d'una regió de libració a l'altra. Gràcies al seu caràcter hiperbòlic, una òrbita de libració té uns objectes invariants associats: les varietats estable i inestable. Si tenim present que la varietat estable està formada per trajectòries que tendeixen cap a l'òrbita a la qual estan associades quan el temps avança, i que la varietat inestable fa el mateix però enrera en el temps, una intersecció entre una varietat estable i una d'inestable proporciona un camí asimptòtic entre les òrbites corresponents. Un mètode per trobar connexions d'aquest tipus entre òrbites planes entorn de L1 i L2 es presenta a la segona part de la tesi, i s'hi inclouen els resultats d'aplicar aquest mètode als casos dels problemes restringits Sol Terra i Terra-Lluna.
La idea d'intersecar varietats hiperbòliques es pot aplicar també en la cerca de camins de baix cost entre les regions de libració del sistema Sol-Terra i Terra-Lluna. Si existissin camins naturals de les òrbites de libració solars cap a les lunars, s'obtindria una manera barata d'anar a la Lluna fent servir varietats invariants, cosa que no es pot fer de manera directa. I a l'inversa, un camí de les regions de libració lunars cap a les solars permetria, per exemple, que una estació fos col.locada en òrbita entorn del punt L2 lunar i servís com a base per donar servei a les missions que operen en òrbites de libració del sistema Sol-Terra. A la tercera part de la tesi es presenten mètodes per trobar trajectòries de baix cost que uneixen la regió L2 del sistema Terra-Lluna amb la regió L2 del sistema Sol-Terra, primer per òrbites planes i més endavant per òrbites de Lissajous, fent servir dos problemes de tres cossos acoblats. Un cop trobades les trajectòries en aquest model simplificat, convé refinar-les per fer-les més realistes. Una metodologia per obtenir trajectòries en efemèrides reals JPL a partir de les trobades entre òrbites de Lissajous en el model acoblat es presenta a la part final de la tesi. Aquestes trajectòries necessiten una maniobra en el punt d'acoblament, que és reduïda en el procés de refinat, arribant a obtenir trajectòries de cost zero quan això és possible.
This PhD. thesis lies within the field of astrodynamics. It provides solutions to problems which have been identified in mission design near libration points, by using dynamical systems theory.
The restricted three body problem is a well known model to study the motion of an infinitesimal mass under the gravitational attraction of two massive bodies. Its five equilibrium points, specially L1 and L2, have been the object of several studies aimed at practical applications in the last decades (SOHO, Genesis...).
In general, any mission in orbit around L2 of the Sun-Earth system is affected by occultations due to the shadow of the Earth. When the orbit is around L1, the eclipses are caused by the strong electromagnetic influence of the Sun. Among all different types of libration orbits, Lissajous type ones are the combination of two perpendicular oscillations. Its main advantage is that the amplitudes of the oscillations can be chosen independently and this fact makes Lissajous orbits more adaptable to the requirements of each particular mission than other kinds of libration motions. The need for eclipse avoidance strategies in Lissajous orbits around L1 and L2 motivated the first part of the thesis. It is in this part where a tool for planning maneuvers in Lissajous orbits is presented, which not only solves the eclipse avoidance problem, but can also be used for transferring between orbits having different amplitudes and for planning rendez-vous strategies.
On the other hand, there exist low cost channels joining the L1 and L2 points of a given sistem, which represent a natural way of transferring from one libration region to the other one. Furthermore, there exist hyperbolic invariant objects, called stable and unstable manifolds, which are associated with libration orbits due to their hyperbolic character. If we bear in mind that the stable manifold of a libration orbit consists of trajectories which tend to the orbit as time goes by, and that the unstable manifold does so but backwards in time, any intersection between a stable and an unstable manifold will provide an asymptotic path between the corresponding libration orbits. A methodology for finding such asymptotic connecting paths between planar orbits around L1 and L2 is presented in the second part of the dissertation, including results for the particular cases of the Sun-Earth and Earth-Moon problems.
Moreover, the idea of intersecting hyperbolic manifolds can be applied in the search for low cost paths joining the libration regions of different problems, such as the Sun-Earth and the Earth-Moon ones. If natural paths from the solar libration regions to the lunar ones was found, it would provide a cheap way of transferring to the Moon from the vicinity of the Earth, which is not possible in a direct way using invariant manifolds. And the other way round, paths from the lunar libration regions to the solar ones would allow for the placement of a station in orbit around the lunar L2, providing services to solar libration missions, for instance. In the third part of the thesis, a methodology for finding low cost trajectories joining the lunar L2 region and the solar L2 region is presented. This methodology was developed in a first step for planar orbits and in a further step for Lissajous type orbits, using in both cases two coupled restricted three body problems to model the Sun-Earth-Moon spacecraft four body problem. Once trajectories have been found in this simplified model, it is convenient to refine them to more realistic models. A methodology for obtaining JPL real ephemeris trajectories from the initial ones found in the coupled models is presented in the last part of the dissertation. These trajectories need a maneuver at the coupling point, which can be reduced in the refinement process until low cost connecting trajectories in real ephemeris are obtained (even zero cost, when possible).
SARAZIN, FREDERIC. "La fermeture de couche n = 28 : coexistence de formes et contribution spin-orbite." Caen, 1999. http://www.theses.fr/1999CAEN2041.
Повний текст джерелаBURGUIERE, OLIVIER. "Contribution a l'etude biometrique de la croissance de la face et de l'orbite chez le foetus humain." Aix-Marseille 2, 1994. http://www.theses.fr/1994AIX20731.
Повний текст джерелаMeyer, Jennifer [Verfasser], and Gereon [Akademischer Betreuer] Niedner-Schatteburg. "Spin and orbital contributions to the magnetic moment of isolated transition metal clusters and complexes / Jennifer Meyer. Betreuer: Gereon Niedner-Schatteburg." Kaiserslautern : Technische Universität Kaiserslautern, 2014. http://d-nb.info/1054636117/34.
Повний текст джерелаLa, Hera Pedro. "Underactuated mechanical systems : Contributions to trajectory planning, analysis, and control." Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-39719.
Повний текст джерелаSabor, Said. "Contribution à l'étude quantique du carbure de tungstène neutre (WC) et ionisé (WCq+, q=1, 2)." Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1066/document.
Повний текст джерелаMetal carbides and oxides are more interesting in catalytic and industrial domains. Tungsten carbide WC has been detected as serious substituent of platinum Pt catalytic. The ultimate goal of this thesis is theoretical studies of electronic structure, stability and the bound nature on WC, WO and its cations. Our preliminary research were motiving by the available spectroscopic data on W, W+, W2+, WC et WC2+. We used the methodology (CASSCF/MRCI/MRCI+Q/aug-cc-pV5Z(-PP)) implemented on MOLPRO package to perform quantum calculations with high accuracy taking into account the correlation and relativistic effects with a specific treatment of spin orbit coupling for some low lying excited electronic states of WCn+, (n=0, 1 et 2). Our results are shown in good agreement with those available in the literature. Furthermore, in this work for the first time we demonstrated that a carbide dication (WC2+) is thermodynamically stable
Johansson, Petter. "Contribution from Spin-Orbit Coupling to the Langmuir Wave Dispersion Relation in Magnetized Plasmas." Thesis, Umeå universitet, Institutionen för fysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46820.
Повний текст джерелаAragón, Àngel Angela. "Contributions to ionospheric electron density retrieval." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/77897.
Повний текст джерелаLa transformada d’Abel és una tècnica emprada freqüentment en radio ocultacions (RO) que, en el context ionosfèric, permet deduir densitats electròniques a partir de dades de STEC (Slant Total Electron Content) derivats a partir d’observacions de la fase portadora. Aquesta tècnica està basada en mesures precises en doble freqüència de fase portadora (banda L) d’un receptor GPS a bord d’un satèl·lit d’òrbita baixa (Low Earth Orbit-LEO-) rastrejant un satèl·lit GPS darrere del limb de la terra. En combinar les dites mesures amb la informació de posicions i velocitats dels satèl·lits GPS i LEO, és possible deduir el canvi en el camí del senyal degut a la presència de l’atmosfera i, conseqüentment, convertir-lo en angles de curvatura (bending angles). A partir d’ells, informació sobre l’índex de refracció vertical pot ser obtinguda mitjançant tècniques d’inversió i transformar-lo en perfils verticals de densitat electrònica i/o perfils d’atmosfera neutra. Una de les hipòtesis bàsiques de la inversió clàssica és suposar que el camp de densitats electròniques té simetria esfèrica en el veïnatge d’una ocultació. Tanmateix, a la pràctica, la petjada d’una ocultació generalment cobreix regions de milers de quilòmetres que pot presentar variabilitat ionosfèrica important; per la qual cosa, la hipòtesi de simetria esfèrica no pot ser garantida. De fet, les inhomogeneitats de la densitat electrònica en la direcció vertical per a una ocultació donada són una de les principals causes d’error quan es fa servir la inversió d’Abel. Per a corregir l’error a causa de la hipòtesi de simetria esfèrica, s’introdueix el concepte de separabilitat. Això implica que la densitat electrònica pot ser expressada com una combinació de dades de Vertical Total Electron Content (VTEC) derivats externament, els quals assumeixen la dependència horitzontal de la densitat, i una funció de forma, la qual alhora assumeix la dependència en altura que és comuna a totes les observacions per a una ocultació donada. Cal notar que l’espessor de capa roman constant a prop de la regió de l’ocultació a causa de la hipòtesi de separabilitat en comptes de la densitat, tal i com succeiria en el cas de fer servir simetria esfèrica. Aquesta tècnica fou aplicada amb èxit a la combinació lineal de fases de GPS L1 i L2, LI=L1-2, la qual proporciona un observable lliure de geometria que depèn només del retard ionosfèric, l’ambigüitat de fase, biases instrumentals i wind-up. Els resultats presenten una millora del 40% en RMS en comparar freqüències del pic de la capa F2 amb dades de ionosonda respecte la inversió clàssica d’Abel. No obstant, la potencial influència de la diferència de camins òptics entre L1 i L2 fou menyspreada. Aquesta tesi doctoral mostra que això no és pas un problema per a la inversió a altures ionosfèriques. Una alternativa per a la inversió de perfils que evita aquesta desavantatge és emprar la curvatura del senyal com a dada principal. La implementació de la separabilitat per a angles de curvatura no és immediata i ha estat un dels objectius d’aquesta tesi. En aquest sentit, el principi de la separabilitat ha esta aplicat als angles de curvatura de L1 en comptes de la combinació LI com en treballs anterior. A més, treballant amb angles de curvatura, la separabilitat pot ser també traslladada a l’obtenció de perfils troposfèrics. Varies aproximacions per a obtenir la contribució de les parts altes de la ionosfera han estat també estudiades, apart del fet de prescindir simplement d’aquesta contribució. S’ha fet servir un model climatològic, una extrapolació exponencial i el fet de considera les implicacions d’usar separabilitat. També s’ha proposat una manera pera obtenir funcions de mapeo (mapping functions) deduïdes a partir de perfils RO. Tanmateix, treballant només amb dades derivades únicament de RO, s’està menyspreant sistemàticament la contribució de la protonosfera al TEC. Amb la proposta inicial de funció de mapeo només tenim en compte la contribució ionosfèrica. La solució ideal per a aplicacions de dades de terra GNSS seria fer servir un model de dues capes, una per a modelar la ionosfera i una altra per la protonosfera, o alternativament, si es volgués alta resolució tomogràfica, combinar observacions RO i amb elevació positiva de LEOs amb dades de terra. S’ha provat que modelant amb dues capes, els resultats obtinguts amb l’anàlisi de dades RO han pogut estar validats. La conclusió més important és que la proporció entre la contribució ionosfèrica i protonosfèrica és el paràmetre que explica la localització de les altures efectives.
The Abel transform is a frequently used radio occultation (RO) inversion technique which, in the ionospheric context, allows retrieving electron densities as a function of height from STEC (Slant Total Electron Content) measurements derived from carrier phase observations. The GPS RO technique is based on precise carrier dual-frequency phase measurements (L-band) of a GPS receiver onboard a Low Earth Orbit satellite (LEO) tracking a rising or setting GPS satellite behind the limb of the earth. When combining such measurements with the information from the positions and velocities of GPS and LEO satellites, it is possible to derive the phase path change due to the atmosphere during an occultation event which subsequently can be converted into bending angles. From these, information about the vertical refraction index can be obtained by means of inversion techniques, which can then be converted into ionospheric vertical electron density profiles and/or neutral atmospheric profiles. One of the basic assumptions in the classical approach is to assume the spherical symmetry of the electron density field in the vicinity of an occultation. However, in practice, the footprint of an occultation generally covers wide regions of thousands of kilometres in length that may show significant ionospheric variability; therefore this hypothesis cannot be guaranteed. Indeed, inhomogeneous electron density in the horizontal direction for a given occultation is believed to be one of the main sources of error when using the Abel inversion. In order to correct the error due to the spherical symmetry assumption, the separability concept is introduced and applied. This implies that the electron density can be expressed by a combination of externally derived Vertical Total Electron Content (VTEC) data, which assumes the horizontal dependency, and a shape function, which in turn assumes the height dependency that is common to all the observations for a given occultation. Note that the slab thickness remains constant near the occultation due to the separability hypothesis instead of the density as is the case of the spherical symmetry. This technique was successfully applied to the linear combination of the GPS carrier phases L1 and L2, , LI= L1-2 which is a geometric free observable that depends only on the ionospheric delay, phase ambiguity, instrumental bias and wind-up. The result was an improvement of about 40% in RMS when comparing frequencies of the F2 layer peak with ionosonde data and the classical Abel inversion. The main advantage of such developed technique is its simple computation. Nevertheless, the potential influence of the different signal paths between L1 and L2 was neglected. Regarding this aspect, this Ph.D. dissertation shows that is not a problem for inversion at ionospheric heights. An alternative to inverting the profile, which overcomes this disadvantage, is to use the bending angle of the signal as the main input data. The implementation of separability when using the bending angle is not immediate and was, actually, one of the goals of this thesis. In this sense, the separability approach has been applied to measured L1 bending angle, instead of LI combination as reported in previous work. Additionally, this approach could also be translated to tropospheric profile retrievals. Several approaches to account for the upper ionospheric contribution have been also tackled, apart from the fact of neglecting such contribution: a climatological model, an exponential extrapolation and condisering the nature of the separability concept. it has been proposed a way to obtain mapping functions derived from RO profiles. Such mapping functions can be easily derived from usual ionospheric parameters. For the contribution of this part of the ionosphere, it has been shown that it is capable to account for the total electron content (TEC). However, by working solely with RO derived data, we are systematically neglecting the contribution of the protonosphere to the total electron content. With the initial proposed mapping function based on the analysis of effective heights derived from RO, only the ionospheric contribution is accounted for. The ideal solution for ground-based GNSS data applications would be to use a two-layer model, one to model the ionosphere and another one for the protonosphere, or alternatively, if we are looking for high tomographic resolution, to combine RO and topside LEO observations with ground data. It has been shown that by modelling in such way, the results that were obtained with RO data analysis can be validated. The most important conclusion is that the ratio between ionospheric and protonospheric contribution is the driver for the location of the effective heights.
Mortessagne, Fabrice. "Une contribution au chaos ondulatoire expérimental." Habilitation à diriger des recherches, Université de Nice Sophia-Antipolis, 2006. http://tel.archives-ouvertes.fr/tel-00120405.
Повний текст джерелаRoustan, Josette. "Contribution à l'étude des aspects fondamentaux de quelques conducteurs organiques quasi-unidimensionnels au moyen du formalisme des orbitales moléculaires alternantes." 63-Aubière : Impr. U.E.R. Sci, 1985. http://catalogue.bnf.fr/ark:/12148/cb361102949.
Повний текст джерелаExtr. en partie de International journal of quantum chemistry. 15, 1979, 15-35 ; 18, 1980, 1057-1069 ; de Lecture notes in physics. 95, 1979, 199-203 ; de Molecular crystals and liquid crystals. 77, 1981, 333-340.
Hartenstein, Tobias [Verfasser]. "Contributions to the Theory of Spin-Correlations in Electron Gases With Spin-Orbit Coupling / Tobias Hartenstein." München : Verlag Dr. Hut, 2013. http://d-nb.info/1045988634/34.
Повний текст джерелаRoux, Daniel. "Contribution à l'étude théorique des effets de courbure d'espace en spectroscopie atomique : effet Zeeman et effet Stark dans un espace à courbure constante." Lyon 1, 1985. http://www.theses.fr/1985LYO10027.
Повний текст джерелаRenaud, Jacques. "Contribution à l'étude mathématique de la quantification et des contractions : courbure, vitesse de la lumière, masse et constante de Planck." Paris 7, 1994. http://www.theses.fr/1994PA077083.
Повний текст джерелаLe, Ven Jessica. "Contribution à l'étude du lien entre Annonaceae et parkinsonisme : identification et quantification d'acétogénines par déréplication; métabolisation de phase I et approche de la distribution de l'annonacine." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00784165.
Повний текст джерелаBabaky, Omar. "Contribution à l'analyse des spectres de Te et Na et étude de l'interaction spin-orbite entre les états... par spectrométrie de Fourier de la fluorescence induite par laser." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375956107.
Повний текст джерелаMorio, Vincent. "Contribution au développement d’une loi de guidage autonome par platitude : application à une mission de rentrée atmosphérique." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13797/document.
Повний текст джерелаThis thesis deals with the design of an autonomous guidance law based on flatness approach for atmospheric reentry vehicles. The problematic involved by the design of an autonomous guidance law relates to the global organization, the integration and the management of relevant data up to the mastering of the spacecraft during the re-entry mission. The autonomous guidance law proposed in this dissertation is based on flatness concept, in order to perform onboard processing so as to locally assign autonomy and responsibility to the vehicle, thus exempting the ground segment from "low level" operational tasks, so that it can ensure more efficiently its mission of global coordination. The first part of the manuscript deals with the formal characterization of flat outputs for nonlinear systems governed by ordinary differential equations, as well as for linear time-delay systems. Constructive algorithms are proposed in order to compute candidate flat outputs within a standard formal computing environment. In the second part of the manuscript, a global and generic reentry trajectory replanning methodology is proposed in order to provide a fault-tolerance capability to the guidance law, when facing single/multiple control surface failures that could occur during the critical phases of an atmospheric reentry mission. In addition, a superellipsoidal annexion method is proposed so as to convexify the optimal control problem described in the flat outputs space. The proposed guidance law is then applied step by step to an atmospheric reentry mission for the US Space Shuttle orbiter STS-1
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.
Повний текст джерелаBabaky, Omar. "Contribution à l'analyse des spectres de Te2 et Na2 et étude de l'interaction spin-orbite entre les état 3πu et A1Σ+u de Na2 par spectrométrie de Fourier de la fluorescence induite par laser". Lyon 1, 1986. http://www.theses.fr/1986LYO19033.
Повний текст джерелаSimon, Cyril. "Contribution à l'étude des entrées d'énergie solaire dans l'ionosphère : Ions doublement chargés et transport cinétique des protons - Application à la Terre et à Titan." Phd thesis, Université Joseph Fourier (Grenoble), 2006. http://tel.archives-ouvertes.fr/tel-00109802.
Повний текст джерела"Contributions to Libration Orbit Mission Design using Hyperbolic Invariant Manifolds." Universitat Politècnica de Catalunya, 2007. http://www.tesisenxarxa.net/TDX-0918107-101713/.
Повний текст джерелаCunha, Daniela Patrícia Miranda da. "Contributo da análise paleopatológica e paleoparasitológica na interpretação de indicadores de stresse fisiológico: estudo de uma amostra Islâmica medieval exumada de Santarém (Portugal)." Master's thesis, 2015. http://hdl.handle.net/10316/32120.
Повний текст джерелаA presente dissertação pretende contribuir para a interpretação dos indicadores de stresse fisiológico em 30 esqueletos medievais exumados de uma necrópole Islâmica localizada no subsolo do Largo Cândido dos Reis (Santarém). Para isso foi analisada distribuição demográfica dos indicadores de stresse, as relações que se estabelecem entre estes a nível individual, e suas associações a infeções parasitárias. Os esqueletos foram selecionados tendo em conta a sua preservação e o sedimento adjacente às áreas de interesse. Analisou-se macroscopicamente os crânios em busca de indicadores de stresse fisiológico: cribra cranii, cribra orbitalia e hipoplasias lineares do esmalte. Destes esqueletos recolheu-se também sedimento da região pélvica e craniana (amostra de controlo) para análise paleoparasitológica. As amostras de sedimento foram reidratadas com uma solução de Na3Po4 (0,5% concentração) e sedimentadas com um centrifuga a 2000 rotações por 1 minuto. Foram analisadas ao microscópio ótico pelo menos 20 lâminas de amostra para cada indivíduo em busca de vestígios de parasitas intestinais. As amostras de controlo foram observadas quando as respetivas amostras da zona ilíaca se mostraram positivas para helmintes. Não foram encontrados lesões de cribra cranii, mas a cribra orbitalia foi identificada em 57,89% dos indivíduos. A prevalência da lesão não foi afetada pelo sexo nem pela idade à morte. As hipoplasias lineares do esmalte observaram-se em 46,67% dos indivíduos, ocorrendo predominantemente nos caninos e incisivos. Estes tipos de dentes têm idêntico período de formação (1 a 6 anos) o que sugere que devem resultar de stresse sistémico. Foram recuperados ovos de parasitas intestinais em 23% das amostras. Ovos das espécies T. trichiura e A. lumbricoides foram identificadas em concentrações relativamente baixas. Os indicadores de stresse observaram-se simultaneamente em 21,05% dos indivíduos, todos do sexo masculino. Os indicadores de stresse revelaram-se positivamente correlacionados com infeções parasitárias, sendo que esta relação foi mais influenciada pelas hipoplasias lineares no esmalte. Estes resultados sugerem que os mesmos indicadores de stresse em diferentes indivíduos advêm de processos patológicos distintos: anemias adquiridas e congénitas, processos hemorrágicos, inflamatórios e infeciosos.
The aim of this dissertation is to contribute to the interpretation of physiological stress indicators in 30 medieval skeletons, exhumed from the Islamic necropolis located under Largo Cândido dos Reis (Santarém). The demographic distribution of stress indicators was analyzed as well as the relationship between different stress indicators and its associations with parasitic infection. The skeletons were selected by its preservation and the amount of sediment near the areas of interest. The skulls were analyzed macroscopically in search for stress indicators: cribra cranii, cribra orbitalia and linear enamel hypoplasias. Sediment from the pelvic and cranial (control samples) regions were collected from all skeletons for paleoparasitological analysis. The sediment samples were rehidratated in a 0.5% concentration solution of Na3Po4 and sedimentated in a centrifuge at 2000 rotations for 1 minute. At least 20 lamina were analyzed by optical microscopy for each individual in search for traces of intestinal parasites. The control samples were observed when the pelvic samples of the same individual were positive for helminths. It was not found any lesion of cribra cranii, but cribra orbitalia was identified in 57.89% of the individuals. The prevalence of this lesion was not affected by sex or age at death. The enamel hypoplasias were observed in 46.67% of the analyzed individuals, and occurred more commonly on canines and incisors. These tooth have similar period of formation (1 to 6 years), which suggest that these lesions should result from systemic stress. Parasites eggs were recovered from 23% of the analyzed samples. Eggs of the species T. trichiura and A. lumbricoides were identified in relatively small concentrations. The different stress indicators were observed simultaneously in 21.05% of the individuals and always on males. The stress indicators appeared positively correlated to parasitic infection, with enamel hypoplasia being the most influential stress indicator in this relationship. These results suggests that the same stress indicators in different individual came from diverse pathological processes: acquired and congenital anemia, hemorrhagic, inflammatory and infectious processes.
Cho-Chun, Chen. "The Study of the Contributions of Bulk and Structure Inversion Asymmetry to Spin-orbit Interaction in 2D Systems." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0016-1303200709321271.
Повний текст джерелаChen, Cho-Chun, and 陳朝君. "The Study of the Contributions of Bulk and Structure Inversion Asymmetry to Spin-orbit Interaction in 2D Systems." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/27089221926433506273.
Повний текст джерела國立清華大學
電子工程研究所
94
In this thesis, the contributions of bulk and structure inversion asymmetry to spin-orbit interaction in two-dimensional system were studied. In the be- ginning, we calculated Dresselhaus parameter ° and Rashba parameter ® of material systems, then theoretically estimated the spin splitting energy ¢0 resulting from bulk inversion asymmetry (BIA) and structure inversion asymmetry (SIA). For Dresselhaus parameter once the structure was grown, it was decided its value. However Rashba parameter changes with the di®er- ence of band structure and carrier density, it can be separated into ¯eld and boundary parts to calculate. In material system 1, wafer 1 and wafer 3 has a doping layer above the 2D channel, but wafer 2 and wafer 4 do below the channel. The 25 nm inserted InP layer inset above the channel for wafer 1 and wafer 2. After calculating, the doping layer position decided the sign of the ¯eld contribution and the inserted InP layer enhanced or reduced the total Rashba parameter depend- ing the doping layer position. It can be observed that for wafer 1 and wafer 3 the contribution to spin splitting energy of SIA is larger than BIA, for wafer 2 due to InP layer the reduction to total Rashba parameter resulted in the SIA spin splitting energy is among two of BIA spin splitting energy of di®erent direction, for wafer4 the SIA splitting energy decreased with a increasing carrier density, especially over ns = 9:3 £ 1011cm¡2, BIA contri- bution is larger than SIA. In material system 2, the lattice mismatch with GaAs material In0:2Ga0:8As was used for 2D quantum well. The front doping and inserted GaAs was pre- sented in order to product a step-like valence band ¡8. The strain e®ect was also considered. The results of our analysis was that the SIA contribution is smaller than BIA even though GaAs inset into the 2D quantum well.
Bondoky, Karim. "A Contribution to Validation and Testing of Non-Compliant Docking Contact Dynamics of Small and Rigid Satellites Using Hardware-In-The-Loop Simulation." 2020. https://tud.qucosa.de/id/qucosa%3A73251.
Повний текст джерелаNthako, Matshwenyego Dorothy. "Factors contributing to low completion rates of National Certificate Vocational (NCV) students at a TVET college in the Northwest Province." Diss., 2020. http://hdl.handle.net/10500/26494.
Повний текст джерелаEducational Management and Leadership
M. Ed. (Educational Management)