Academic literature on the topic 'La gravité'
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Journal articles on the topic "La gravité"
Golse, Bernard. "Gravité, vide, gravidité." Cliniques méditerranéennes 105, no. 1 (February 2, 2022): 49–58. http://dx.doi.org/10.3917/cm.105.0049.
Full textMimoun, Mouloud. "La Gravité." Hommes & migrations, no. 1342 (July 1, 2023): 203. http://dx.doi.org/10.4000/hommesmigrations.15880.
Full textGermain, Jean-Pierre. "Ondes de gravité." La Houille Blanche, no. 5-6 (August 1994): 95–99. http://dx.doi.org/10.1051/lhb/1994063.
Full textBasbous, Karim. "L’architecture sans gravité." Le Visiteur N° 22, no. 1 (March 5, 2017): 21–34. http://dx.doi.org/10.3917/visit.022.0019.
Full textBoivin2, Rémi. "Une mesure de la gravité moyenne des crimes enregistrés par la police1." Criminologie 46, no. 2 (December 13, 2013): 221–41. http://dx.doi.org/10.7202/1020994ar.
Full textTremblay, Stéphane, Joël Tremblay, and Marie Simard. "Gravité de la toxicomanie d’adolescents en traitement : liens avec l’auto-révélation de transitions familiales et de placements." Drogues, santé et société 6, no. 2 (May 21, 2008): 47–82. http://dx.doi.org/10.7202/018040ar.
Full textHenneaux, Marc. "Champs, cordes et gravité." L’annuaire du Collège de France, no. 120 (February 13, 2023): 77–78. http://dx.doi.org/10.4000/annuaire-cdf.18162.
Full textRenaud, B., and A. Santin. "Critères de gravité et outils d’évaluation de la gravité des pneumopathies aiguës communautaires." Annales françaises de médecine d'urgence 1, no. 4 (April 8, 2011): 248–59. http://dx.doi.org/10.1007/s13341-011-0057-9.
Full textLécu, Anne. "Le poids de la gravité." Études N° 4293, no. 5 (April 28, 2022): 89–90. http://dx.doi.org/10.3917/etu.4293.0089.
Full textde Lastens, Emeric. "Jeux de l'esprit, sans gravité." Vertigo 42, no. 1 (2012): 6. http://dx.doi.org/10.3917/ver.042.0004.
Full textDissertations / Theses on the topic "La gravité"
Tiret, Olivier. "Dynamique des galaxies : gravité newtonienne & gravité modifiée." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2008. http://tel.archives-ouvertes.fr/tel-00335993.
Full textCette expression de la gravitation est non-linéaire et impose une méthode différente de celle utilisée dans les systèmes avec matière noire. J'ai écrit un code permettant la résolution des deux modèles de gravité, ce qui a permis de les comparer. J'ai testé ainsi l'évolution de galaxies spirales isolées puis en interaction. Ces simulations modélisent aussi la dissipation du gaz froid et la formation d'étoiles. Celles-ci ont montré que les galaxies sont moins stables en gravitation modifiée qu'en gravitation newtonienne, elles forment des barres plus rapidement. Ces simulations ont aussi révélé des différences importantes sur les transferts de moment angulaire lors des formations des barres et sur les effets de friction dynamique qui ralentissent les barres. Ce travail a permis de réaliser, pour la première fois en gravité modifiée, des simulations de galaxies en interaction du type des Antennes. Là encore, les effets de friction dynamique ont un rôle majeur sur la durée du temps de fusion, plus long en gravitation modifiée. Ceci ouvre des horizons vers des simulations cosmologiques qui pourraient valoriser un modèle en analysant la formation hiérarchique des structures à partir des fluctuations de densité primordiales. Par ailleurs, la modélisation de la cinématique des galaxies (naines, spirales et elliptiques) est aussi approfondie. En particulier, l'analyse des courbes de rotation des galaxies spirales montre que celles-ci peuvent contenir un composant de gaz moléculaire froid deux fois plus massif que le composant atomique.
Crisostomi, Marco. "Gravité massive." Paris 7, 2014. http://www.theses.fr/2014PA077020.
Full textRIn this thesis are studied modifications of General Relativity (GR) at large distances. GR is the unique theory of a self interacting massless spin two field, the graviton; our study considers the case where the spin two field is instead massive, hence the name Massive Gravity. For a long time, it was believed that realize such kind of theories was impossible due to a ghost instability that generically emerges at nonlinear level. Only recently this problem has been overcome and several modifications that evade this instability have been found. The simplest way to realize massive gravity consists in adding to the Einstein-Hilbert action a potential built by non¬derivative self-couplings of the metric which, to be realized, require the introduction of an additional metric. We perform the canonical analysis for a general massive deformation of GR in a fully non-perturbative and background independent way and find the conditions that a potential has to satisfy in order to avoid such instability. Among the possible candidates, we find that Lorentz invariance considerably restricts the viable potentials and, when MinkOwski space is required as a background, they probably reduce to a single one. For this potential we analyze the basic phenomenology in the framework of bigravity theories, where the extra metric is taken dynamical. We study spherically symmetric solutions and, in spite of the discontinuity that one encounters at linear level in the zero mass limit, we show the recovery of GR close to the source via the Vainshtein mechanism, together with the asymptotic Yukawa decay far from it. Also we investigate cosmological solutions and their linear perturbations: FRW solutions exist and are very close to the ones in GR until, at very late time, the universe flows in a dS phase. Unfortunately, cosmological perturbations show an exponential instability, at early time in the scalar sector, that signais the unreliability of the standard perturbation theory in sharp contrast to GR. The picture that emerges is that bigravity is more than a tool in formulating massive gravity, it is an important ingredient for a physically acceptable theory
Parau, Emilian. "Ondes interfaciales de flexion-gravité et de capillarité-gravité." Nice, 2000. http://www.theses.fr/2000NICE5439.
Full textYzombard, Pauline. "Laser cooling and manipulation of antimatter in the AEgIS experiment." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS272/document.
Full textMy Ph.D project took place within the AEgIS collaboration, one of the antimatter experiments at the CERN. The final goal of the experiment is to perform a gravity test on a cold antihydrogen (Hbar) beam. AEgIS proposes to create such a cold Hbar beam based on a charge exchange reaction between excited Rydberg Positronium (Ps) and cold trapped antiprotons: 〖Ps〗^* + pbar → (H^*)⁻ + e⁻. Studying the Ps physics is crucial for the experiment, and requires adapted lasers systems. During this Ph.D, my primary undertaking was the responsibility for the laser systems in AEgIS. To excite Ps atom up to its Rydberg states (≃20) in presence of a high magnetic field (1 T), two broadband pulsed lasers have been developed. We realized the first laser excitation of the Ps into the n=3 level, and demonstrated an efficient optical path to reach the Rydberg state n=16-17. These results, obtained in the vacuum test chamber and in absence of strong magnetic field, reach a milestone toward the formation of antihydrogen in AEgIS, and the immediate next step for us is to excite Ps atoms inside our 1 T trapping apparatus, where the formation of antihydrogen will take place. However, even once this next step will be successful, the production rate of antihydrogen atoms will nevertheless be very low, and their temperature much higher than could be wished. During my Ph.D, I have installed further excitation lasers, foreseen to perform fine spectroscopy on Ps atoms and that excite optical transitions suitable for a possible Doppler cooling. I have carried out theoretical studies and simulations to determine the proper characteristics required for a cooling laser system. The transverse laser cooling of the Ps beam will enhance the overlap between the trapped antiprotons plasma and the Ps beam during the charge-exchange process, and therefore drastically improve the production rate of antihydrogen. The control of the compression and cooling of the antiproton plasma is also crucial for the antihydrogen formation. During the beam-times of 2014 and 2015, I participated in the characterization and optimization our catching and manipulation procedures to reach highly compressed antiproton plasma, in repeatable conditions. Another project in AEgIS I took part aims to improve the formation rate of ultracold antihydrogen, by studying the possibility of a sympathetically cooling of the antiprotons using a laser-cooled anion plasma. I investigated some laser cooling schemes on the C₂⁻ molecular anions, and the simulations are promising. I actively contribute to the commissioning of the test apparatus at CERN to carry on the trials of laser cooling on the C₂⁻ species. If successful, this result will not only be the first cooling of anions by laser, but will open the way to a highly efficient production of ultracold antihydrogen atoms
Le, Vacon Emmanuelle. "Hellp syndrome : facteurs de gravité." Bordeaux 2, 1999. http://www.theses.fr/1999BOR2M120.
Full textLehebel, Antoine. "Objets astrophysiques compacts en gravité modifiée." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS204/document.
Full textTwenty years have passed since the discovery of the accelerated expansion of the Universe, reviving the interest for alternative theories of gravity. Adding a scalar degree of freedom to the usual metric of general relativity is one of the simplest ways to modify our gravitational theory. In parallel, our knowledge about black holes and neutron stars is booming, notably thanks to the advent of gravitational wave astronomy. This thesis is at the crossroads between the two fields, investigating the properties of compact objects in extended scalar-tensor theories. I start by reviewing essential no-hair results established since the seventies. After discussing the no-hair theorem proposed for black holes in Horndeski theory, I present its extension to stars. The second part of the thesis investigates in detail the various ways to circumvent this theorem. These notably include solutions with a time-dependent scalar field in order to match cosmological evolution, but also static and asymptotically flat configurations. In a third part, I establish an important stability criterion for these solutions, based on their causal structure. It is also the occasion to study the propagation of gravitational waves in black hole environments, and to select the theories where gravitational waves travel at the same speed as light
Robichaud-Hallé, Laurence. "Association entre la gravité de l'apnée obstructive du sommeil et la gravité de la multimorbidité." Mémoire, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6353.
Full textHuguet, Ludovic. "Cristallisation et convection sous hyper-gravité." Thesis, Lyon, École normale supérieure, 2014. http://www.theses.fr/2014ENSL0950/document.
Full textThe inner core boundary (ICB) is unstable, and a mushy layer forms under very particular conditions in which the crystallization is very slow compared to the very vigorous convection of the liquid core. To mimic these conditions, we have investigated a mushy layer under hyper-gravity in a centrifuge. The thickness of a mushy layer decreases with gravity and the solid fraction increases. This is coherent with seismological studies suggesting that the solid fraction at the ICB is close to unity. Moreover, seismology shows that the inner core is very heterogeneous in terms of elastic anisotropy, attenuation or wave velocity and that there exists a strong East-West dichotomy on the ICB. One hypothesis is that the latter is due to a translation of the inner core that would cause crystallization on one hemisphere and melting on the other one. We have tested that hypothesis with experiments of solidification and melting of a mush. We have used ultrasounds as an analogue to the seismic waves to quantify structural changes in the mush from measurements of attenuation and scattering. From our observations, it is plausible that the ICB on the Western hemisphere s melting while it is solidifying on the Eastern hemisphere. In other experiments, using xenon gas under hyper-gravity, we have observed an adiabatic gradient for the first time. This thesis shows the feasibility of these experiments and the possibility to check experimentally the approximations used for compressible convection
Deladurantaye, Pascal. "Agrégation fractale en gravité réduite simulée." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq25294.pdf.
Full textEl, Khouri Laurence. "Hydrodynamique des fluides supercritiques et gravité." Paris 6, 2003. http://www.theses.fr/2003PA066427.
Full textBooks on the topic "La gravité"
1968-, Fournier Guillaume, ed. Gravité. Saint-Mammès, France: Le Bélial', 2008.
Find full textRothen, François. Surprenante gravité. Lausanne: Presses polytechniques et universitaires romandes, 2009.
Find full textL'intranquille gravité: Poésie. Montréal: Triptyque, 2010.
Find full textL'espace sans gravité. Vanves: Marabout, 2016.
Find full textCouquiaud, Maurice. Chants de gravité. Paris: L'Harmattan, 1996.
Find full textNys-Mazure, Colette. Trois suites sans gravité. Paris: Rougerie, 1999.
Find full textNarlikar, Jayant Vishnu. Une gravitation sans gravité. Paris: Payot, 1986.
Find full textNarlikar, Jayant Vishnu. The lighter side of gravity. 2nd ed. Cambridge: Cambridge University Press, 1996.
Find full textRichard Serra: L'origine de la gravité. Neuchâtel: Editions Ides et Calendes, 2011.
Find full textFréchuret, Maurice, writer of added commentary and Musée du Louvre-Lens, eds. Bernar Venet: L'hypothèse de la gravité. Paris: Skira, 2021.
Find full textBook chapters on the topic "La gravité"
Larréché, S., M. Chani, S. Ramsang, and G. Mion. "Critères de gravité des morsures de serpents : implications thérapeutiques." In Références en réanimation. Collection de la SRLF, 313–28. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0301-2_21.
Full textDungen, FH van den. "LeČOns Sur Les Ondes De Gravité Des Fluides Incompressibles." In Teorie non linearizzate in elasticità, idrodinamica, aerodinamica, 169–271. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-10902-7_3.
Full textSaviuc, P., and P. Harry. "Critères de gravité des intoxications par les champignons : implications thérapeutiques." In Références en réanimation. Collection de la SRLF, 297–311. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0301-2_20.
Full textRice, Donald A. "Gravity and Gravity Reduction." In Contemporary Geodesy: Proceedings of a Conference Held at the Harvard College Observatory-Smithsonian Astrophysical Observatory, Cambridge, Massachusetts, December 1-2, 1958, 40–44. Washington D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm004p0040.
Full textWellner, Marcel. "Gravity." In Elements of Physics, 175–91. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3860-8_8.
Full textHorvath, Joan, and Rich Cameron. "Gravity." In 3D Printed Science Projects, 35–50. Berkeley, CA: Apress, 2016. http://dx.doi.org/10.1007/978-1-4842-1323-0_3.
Full textSchwichtenberg, Jakob. "Gravity." In Undergraduate Lecture Notes in Physics, 239–44. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19201-7_12.
Full textLang, Kenneth R. "Gravity." In Essential Astrophysics, 69–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-35963-7_3.
Full textKibble, R. "Gravity." In Making Use of Physics for GCSE, 17–28. London: Macmillan Education UK, 1989. http://dx.doi.org/10.1007/978-1-349-10328-7_3.
Full textMartinot, A. "Évaluer la gravité." In Urgences Pédiatriques, 3–8. Elsevier, 2018. http://dx.doi.org/10.1016/b978-2-294-75971-0.00001-8.
Full textConference papers on the topic "La gravité"
Parisot, Charline, Jérémy Cissé, Fioretta Caterina Cosmidis, Flore Allier-Estrada, Maud Lemaître-Blanchart, and Ludovic Abraham. "Sans gravité." In SA '18: SIGGRAPH Asia 2018. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3278625.3278659.
Full textMinden, M. "Les facteurs de gravité des cellulites odontogènes : Une étude prospective monocentrique." In 65ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2017. http://dx.doi.org/10.1051/sfco/20176503032.
Full textRey, Vincent, N. Cesselin, and Max Belzons. "Interaction dynamique ondes de gravité - fond constitué de sédiments en présence d'obstacles rectangulaires." In Journées Nationales Génie Côtier - Génie Civil. Presses Universitaires de Perpignan, 1994. http://dx.doi.org/10.5150/jngcgc.1994.011-r.
Full textChagdali, Mohamed, Soumia Mordane, and KL Maroihi. "Une formulation parabolique des équations de propagation des ondes de gravité en surface." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2000. http://dx.doi.org/10.5150/jngcgc.2000.005-c.
Full textLeroy, Valérie, and Mamoun Naciri. "Méthodes de vraisemblance maximale pour la séparation d'ondes de gravité multi-directionelles en bassin à houle." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 1998. http://dx.doi.org/10.5150/jngcgc.1998.006-l.
Full textDurieux, Alain, Claude Babolat, Pierre Dureux, and Bernard Martin. "Diagnostics optiques pour la mesure de fluides critiques en micro-gravité dans les instruments ALICE et DECLIC." In International Conference on Space Optics 1997, edited by Georges Otrio. SPIE, 2018. http://dx.doi.org/10.1117/12.2326488.
Full textMordane, Soumia, C. Chahine, S. Naasse, and Mohamed Chagdali. "Propagation d'une onde de gravité en présence d’obstacles fixés sur le fond d' un canal. Etude théorique, numérique et expérimentale." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2000. http://dx.doi.org/10.5150/jngcgc.2000.009-m.
Full textCUEVAS, Alexandra, Vincent REY, Julien TOUBOUL, Rémi CHEMIN, and Fabrice ARDHUIN. "Etude en bassin de l’estimation des propriétés d’un courant cisaillé sur la verticale à partir de la dispersion des ondes de gravité de surface." In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2022. http://dx.doi.org/10.5150/jngcgc.2022.004.
Full textSantoni, Alessandro, and Jorge Alfaro. "Very Special Linear Gravity: A Gauge Invariant Graviton Mass." In 41st International Conference on High Energy physics. Trieste, Italy: Sissa Medialab, 2022. http://dx.doi.org/10.22323/1.414.0119.
Full textMELKUMOVA, ELENA. "PLASMON-GRAVITON CONVERSION IN MAGNETIC FIELD IN TEV-SCALE GRAVITY." In Proceedings of the MG13 Meeting on General Relativity. WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814623995_0480.
Full textReports on the topic "La gravité"
Anderson, James, and Eric van Wincoop. Gravity with Gravitas: A Solution to the Border Puzzle. Cambridge, MA: National Bureau of Economic Research, January 2001. http://dx.doi.org/10.3386/w8079.
Full textDavoudiasl, Hooman. Gravi-Burst: Super-GZK Cosmic Rays from Localized Gravity. Office of Scientific and Technical Information (OSTI), October 2000. http://dx.doi.org/10.2172/784723.
Full textNakamura, Aki, Sarah Buckerfield, and Peter Wynne. Australian Fundamental Gravity Network Absolute Gravity Survey 2015 : Gravity Survey ID: 201590. Geoscience Australia, 2016. http://dx.doi.org/10.11636/record.2016.033.
Full textNakamura, A. Australian Fundamental Gravity Network Absolute Gravity Survey 2016: Gravity Survey ID: 201691. Geoscience Australia, 2017. http://dx.doi.org/10.11636/record.2017.015.
Full textBrown, Benjamin. Special Gravity #8 - Linking Entropy and Gravity. ResearchHub Technologies, Inc., October 2023. http://dx.doi.org/10.55277/researchhub.9a5l0lfj.
Full textSobczak, L. W. Gravity Anomalies. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1987. http://dx.doi.org/10.4095/126945.
Full textSkone, Timothy J. Gravity Separation. Office of Scientific and Technical Information (OSTI), March 2014. http://dx.doi.org/10.2172/1509068.
Full textAllen, Treb, Costas Arkolakis, and Yuta Takahashi. Universal Gravity. Cambridge, MA: National Bureau of Economic Research, December 2014. http://dx.doi.org/10.3386/w20787.
Full textBaldwin, Richard, and Daria Taglioni. Gravity for Dummies and Dummies for Gravity Equations. Cambridge, MA: National Bureau of Economic Research, September 2006. http://dx.doi.org/10.3386/w12516.
Full textDaras, Ilias, Gûnther March, Joint Mass Chnge Mission Expert Group, D. Wiese, C. Blackwood, F. Forman, B. Loomis, et al. Next Generation Gravity Mission (NGGM) Mission Requirements Document. ESA, September 2023. http://dx.doi.org/10.5270/esa.nggm-mrd.2023-09-v1.0.
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