Дисертації з теми "Pair Formation"
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Fumanal, Quintana Maria. "Radical-Pair Formation in Organic π-Stacked Architectures". Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/345173.
Повний текст джерелаEn els últims anys, s'ha fet un esforç continu per desenvolupar materials nous purament orgànics amb propietats tecnològicament rellevants. Des de la síntesi de Gomberg del radical neutre trifenilmetil, s'ha reportat una gran varietat de radicals orgànics estables, com ara els nitròxids, verdazils, fenoxils, fenalenils, ditiazolils i compostos basats en triazinil, així com diversos ions radicals funcionalitzats basats en tetracianoetilè (TCNE-•), i tetratiafulvalè (TTF1-.), entre d'altres. Aquestes famílies de radicals orgànics s'utilitzen per a la síntesi de nous derivats amb característiques millorades a partir de la introducció de diferents substituents en el seu esquelet bàsic. No obstant això, els avenços en nous materials s'han d'aconseguir a través d'un disseny racional de les noves estructures químiques. En aquest context, les eines computacionals disponibles poden contribuir substancialment a obtenir els coneixements necessaris sobre els factors que controlen les propietats físiques desitjades, a saber, la conductivitat, el magnetisme i la biestabilitat, dominades fonamentalment per l'estructura electrònica d'aquests materials. El treball presentat en aquesta tesi està dedicat a estudiar diferents derivats purament orgànics que han demostrat ser prometedors per al desenvolupament de nous materials funcionals. En particular, l'atenció s'ha centrat en tres famílies de radicals orgànics que presenten propietats físiques interessants com a conseqüència de la formació de parells de radical Tr, aquests són: (1) els ions radicals, (2) els fenalenils i (3) els compostos basats en triazinil. En global, aquesta tesi doctoral té com a objectiu contribuir al camp de la química computacional, així com a la comprensió de les propietats electròniques que regeixen la dimerització Tr d'aquests sistemes, que, en última instància, determina el seu comportament magnètic i commutable.
Stolwijk, Nicolaas A. "Ionic transport and pair formation in polymer electrolytes." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-181807.
Повний текст джерелаStolwijk, Nicolaas A. "Ionic transport and pair formation in polymer electrolytes." Diffusion fundamentals 20 (2013) 20, S. 1, 2013. https://ul.qucosa.de/id/qucosa%3A13585.
Повний текст джерелаRobertson, Gregory J. "Pair formation, mating system, and winter philopatry in Harlequin Ducks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24345.pdf.
Повний текст джерелаWood, Suzannah. "Understanding the Formation of Kinetically Stable Compounds and the Development of Thin Film Pair Distribution Function Analysis." Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22645.
Повний текст джерела10000-01-01
Geigenfeind, Thomas [Verfasser], and Matthias [Akademischer Betreuer] Schmidt. "Internal and external colloidal anisotropy : pair interactions, sedimentation, and non-equilibrium lane formation / Thomas Geigenfeind ; Betreuer: Matthias Schmidt." Bayreuth : Universität Bayreuth, 2019. http://d-nb.info/1198308621/34.
Повний текст джерелаRudolph, Wolfram W., and Gert Irmer. "Hydration and ion pair formation in common aqueous La(III) salt solutions: a Raman scattering and DFT study." Royal Society of Chemistry, 2015. https://tud.qucosa.de/id/qucosa%3A36118.
Повний текст джерелаBădescu, Toma, Yujin Yang, Frank Bertoldi, Ann Zabludoff, Alexander Karim та Benjamin Magnelli. "Discovery of a Protocluster Associated with a Ly α Blob Pair at z = 2.3". IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625775.
Повний текст джерелаMazyad, Hanaa. "Une approche Multi-agents à Architecture P2P pour l'apprentissage collaboratif." Phd thesis, Université du Littoral Côte d'Opale, 2013. http://tel.archives-ouvertes.fr/tel-00845225.
Повний текст джерелаMarggi, Poullain Sonia. "Rôle des états de Rydberg dans la dynamique de photoionisation et de formation de paires d’ions (NO+,O-) de la molécule NO2 : photoémission induite par rayonnement synchrotron et impulsions lasers femtosecondes." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112006/document.
Повний текст джерелаThe comparative study of ion pair formation and simple photoionization of the NO2 molecule induced by synchrotron radiation (SR) on the one hand and by femtosecond (fs) pulses on the other hand reveals the remarkable role of Rydberg states in the induced electronic and nuclear dynamics. Three main reactions, namely (NO2+ (X 1Σ+g) + e) non dissociative photoionization, (NO+ (X 1Σ+) + O(3P) + e) dissociative photoionization and (NO+ (X 1Σ+) + O- (2P)) ion pair formation have been characterized using the vector correlation method, or photoion and photoelectron coincidence momentum spectroscopy, at SR sources (SOLEIL DESIRS) and at fs laser platforms (CEA, Saclay), respectively. The electron-ion kinetic energy correlation diagram, which is the first observable obtained from these measurements, highlights the excess energy sharing among nuclei and electrons, which strongly depends on the photon excitation mode. The observed remarkable deviations from Franck Condon ionization profiles are attributed to vibronic couplings such as those induced at a conical intersection. The identified reaction pathways confirm the role of the [R*(6a1)-1] and [R*(4b2)-1] Rydberg series excitation as stepping states in multiphoton excitation or in the explored ionization continua. A complementary study of high resolution spectroscopy of [R*(6a1)-1] Rydberg series has been performed (UBC, Vancouver). For a dissociative photoionization (DPI) process, the most complete observable is the photoelectron angular distribution in the reference frame attached to the recoil ion fragment velocity (RFPAD) deduced from the measured (Vi, Ve, P) vector correlation. In order to get access to the dipole matrix elements describing photoionization of the considered excited electronic state, the formalism developed in collaboration with R. R. Lucchese (Texas A&M) describing molecular frame photoemission for a DPI of a linear molecule by one-photon excitation has been extended to the study of DPI processes induced by multiphoton excitation for a polyatomic molecule, such as the NO2 molecule of C2v symmetry. The proposed multivariate analysis of the multiphoton RFPAD constitutes a successful strategy to extract the optimal information on the complex photoionization dynamics and to perform a detailed comparison between experimental results and calculations of photoionization of the molecular excited states
Woo, George Tsu-Ping. "Formulation and physicochemical properties of macro- and microemulsions prepared by interfacial ion-pair formation between amino acids and fatty acids /." Ann Arbor : Univ. Microfilms, 1989. http://www.gbv.de/dms/bs/toc/016181093.pdf.
Повний текст джерелаBrinne, Roos Johanna. "Electron Recombination with Small Molecular Ions." Licentiate thesis, Stockholm : Bioteknologi, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4375.
Повний текст джерелаBarge, Thierry. "Formation de siliciures par réaction métal-silicium : rôle de la diffusion." Aix-Marseille 3, 1993. http://www.theses.fr/1993AIX30101.
Повний текст джерелаYoshida, Masayuki, Masami Morooka, Shuji Tanaka, and Manabu Takahashi. "Formation mechanism of plateau, rapid fall and tail in phosphorus diffusion profile in silicon based on the pair diffusion models of vacancy mechanism and interstitial mechanism." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196177.
Повний текст джерелаYoshida, Masayuki, Masami Morooka, Shuji Tanaka, and Manabu Takahashi. "Formation mechanism of plateau, rapid fall and tail in phosphorus diffusion profile in silicon based on the pair diffusion models of vacancy mechanism and interstitial mechanism." Diffusion fundamentals 2 (2005) 62, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14396.
Повний текст джерелаAmin, Khadija. "Ingénierie métabolique pour la production d'un glycosaminoglycane recombinant d’origine hyperthermophile par fermentation chez Escherichia coli." Thesis, Rennes, Ecole nationale supérieure de chimie, 2020. https://www.ensc-rennes.fr/formations/doctorats.
Повний текст джерелаBrinne, Roos Johanna. "Reaction dynamics on highly excited states." Doctoral thesis, Stockholms universitet, Fysikum, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-27122.
Повний текст джерелаChartier, Dominique. "Informatique et enseignement : problèmes de formation et d'apprentissage contribution à l'ingénierie des formations par production de savoirs." Tours, 1994. http://www.theses.fr/1994TOUR2034.
Повний текст джерелаIn the context of an increasing distribution of individual computer equipments, school keeps on integrating the implement according to polymorphic approaches that should not obliterate teaching conceptions which are sometimes divergent. The problems of training and skill-learning generated by information processing are here the subject of a study based on an observation of the conditions of "production of computer assisted skills" from the point of view of the learners (adults and young people) as well as the teachers (experts and novices) in professional teaching environment. Hence : - is it to be wished for possible to devise a training scheme based on "production of computer assisted skills" that would serve the way in which each one "pilots" his skill-learnings? - is it to be whished for possible to open up a way - amongst others - for a study and development of training schemes by production of skills for the teacher - users of information processing ? Research brought out the following prospects: * the production of skimms helps structuring the period of learning, amongst the teachers as well as amongst the learners. This requires from the subjects taking up the challenge of work to be produced electively by calling on personal knowledge. Computer can then regarded creation, conception. . . . Promoters of the answer to this challenge. * a study and development project of training by production of skills for the teachers in connection with information processing environment enables them consider the production of skills as an "artifact" fit for use to face the complexity of their profession
Barbeau, Rachel. "La supervision par les pairs dans un contexte de formation pratique à l'enseignement." Master's thesis, Université Laval, 1985. http://hdl.handle.net/20.500.11794/29105.
Повний текст джерелаAkkouche, Imen. "Téléenseignement : Formation professionnelle à distance et formation coopérante." Lyon, INSA, 1996. http://theses.insa-lyon.fr/publication/1996ISAL0145/these.pdf.
Повний текст джерелаHow to integrate and with which uses the New Educational Technology (N. E. T. ) to the huge problem of distance computer aided learning (using active pedagogical methods) in manufacturing? It means cooperating existing courseware, to generalise to the learning managers and to the group apprenticeship (role playing and manufacturing simulation games). In each case, these situations must consider the human dimension (individual and social) and the technological dimensions (Computer Science, Multimedia, Networks, for modelling different kinds of exchanges and defining characteristics of computer aided design systems. The aim of our work consists in developing cooperative distance computer aided learning architectures that respond to industrial needs. The concern of these systems is to study in a cooperative computer aided learning context, how to select scenarios characteristics, to do role casting, and how to share useful information. This approach is applied to the world broadcast Lafarge-Coppée courseware and to the CIPE game training
Donnadieu, Bernard. "La formation par alternance, coopération herméneutique /." [Lambesc] : [Université de Provence, Département des sciences de l'éducation], 1998. http://catalogue.bnf.fr/ark:/12148/cb37073211q.
Повний текст джерелаBibliogr. p. 127-133.
Bertin, Jean-Claude. "Élaboration d'un outil de formation et d'auto-formation en anglais du transport international." Bordeaux 2, 1994. http://www.theses.fr/1994BOR21003.
Повний текст джерелаGamel, Sylvie Briançon Serge. "Les groupes de pairs en médecine générale opinion des participants lorrains /." [S.l] : [s.n], 2005. http://www.scd.uhp-nancy.fr/docnum/SCDMED_T_2005_CARREZ_GAMEL_SYLVIE.pdf.
Повний текст джерелаAkkouche, Imen Prévot Patrick. "Téléenseignement formation professionnelle à distance et formation coopérante /." Villeurbanne : Doc'INSA, 1999. http://docinsa.insa-lyon.fr/these/pont.php?id=akkouche.
Повний текст джерелаMalara, Eric. "Étude des commentaires rétroactifs par les pairs dans le contexte de l'évaluation formative." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6384.
Повний текст джерелаBouchard, Denise. "Effet d'un programme de formation par les pairs sur la satisfaction au travail des enseignants du primaire." Thèse, Université du Québec à Trois-Rivières, 1994. http://depot-e.uqtr.ca/4976/1/000611301.pdf.
Повний текст джерелаClavier, Loïc. "Le fonctionnement du système évaluation et du système formation : étude et modélisation des pratiques d'évaluation dans le cadre des formations par alternance : le cas de la formation des personnels d'éducation en I.U.F.M." Tours, 2000. http://www.theses.fr/2000TOUR2018.
Повний текст джерелаChehrouri, Mourad. "Analyse par spectroscopies des molécules formées par interaction d'atomes H,O et N sur des surfaces simulant les grains interstellaires et prédiction des voies de réaction." Thesis, Cergy-Pontoise, 2011. http://www.theses.fr/2011CERG0514/document.
Повний текст джерелаThe work that I present in this thesis is primarily an experimental work carried out in the LAMAp laboratory at the University of Cergy-Pontoise, using the experimental device called FORMOLISM. The main components of this device are: ultra-high vacuum (10-10 mbar), ultra-low temperature (~5 K), atomic jets, TPD mass spectrometry (Thermally Programmed Desorption) and laser spectroscopy using ultraviolet wavelengths around ~200 nm. Thanks to the REMPI-TOF (Resonantly Enhanced Multi-Photon Ionization – Time Of Flight) technique, we have studied i) the nuclear spin conversion of the hydrogen molecule H2 on a porous amorphous water ice surface and ii) the processes of formation of this molecule, which is the most abundant in the interstellar medium, on surfaces simulating interstellar dust grains. The results of this study are of capital interest in astrophysics. Actually, this formation cannot occur in the gas phase but can only be explained by the encounter of two hydrogen atoms on a dust grain in the interstellar medium, the latter playing the role of a catalyst. Different processes are involved in the formation of H2 which require to be identified. With this aim, I present entirely new results on molecular H2 formation on an amorphous silicate surface. I show that the molecule can form in a rovibrationnally excited state of its ground state up to a temperature of about 70 K and that the molecule is released into the gas phase immediately after its formation. These results demonstrate the competition between two mechanisms of formation at very low temperature (<18 K) while another mechanism takes over up to 70 K
Marchand, Pierre. "Étude des processus physiques de la formation d'étoiles par effondrement gravo-turbulent." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1154/document.
Повний текст джерелаThe angular momentum regulation is a hot topic in star formation. From the molecular cloud to th final star, the system loses most of its angular momentum, and several processes are proposed to explain this phenomenon. We focus on non-ideal magnetohydrodynamics (MHD), which describes the coupling between a fluid and its magnetic field. Its efficiency to regulate the angular momentum in realistic conditions has been shown in several studies. First, we develop a code that computes the chemical equilibrium of elements present in the early stages of star formation. We can therefore obtain the values of coefficients defining the strength of the phyical processes associated with non-ideal MHD. We then take interest in one of them, the Hall effect, still poorly studied in this context. We implement it in the eulerian code RAMSES, and use it to quantify its influence during a gravitational collapse. As predicted by theory, the Hall effect greatly influences the size of the protoplanetary disk, in which planets form, and creates envelopes of gas rotating backward compared to the rest of the system
Crida, Aurélien. "Planetary migration in solar system formation." Nice, 2006. http://www.theses.fr/2006NICE4076.
Повний текст джерелаLa migration planétaire est un phénomène apparemment inévitable lors de la formation des planètes dans les disques protoplanétaires. Les interactions gravitationnelles entre les embryons de planète et le disque de gaz font décroître le moment cinétique de l'embryon, qui spirale vers l'étoile centrale. Le temps de migration étant plus court que la durée de vie du disque, aucune planète ne devrait survivre (chapitres 1 et 2). Dans cette thèse, nous essayons de trouver des mécanismes qui empêchent ou ralentissent la migration. Dans le chapitre 3, nous montrons qu'un saut dans le profil de densité du disque de gaz bloque la migration et agit comme un piège à planète. Ainsi bloqué, un coeur solide massif peut accrèter une atmosphère gazeuse et devenir une planète géante. La planète est alors assez massive pour repousser le gaz et ouvrir un sillon autour de son orbite. En analysant des simulations numériques, nous mettons en évidence le rôle des effets de pression dans ce processus dans le chapitre 4; un nouveau critère unifié d'ouverture du sillon en découle. Après la présentation dans le chapitre 5 d'un nouvel algorithme fiable et performant pour réaliser des simulations numériques, nous l'utilisons dans le chapitre 6 pour étudier la migration d'une planète géante et son impact sur l'évolution du disque. La formation d'une cavité s'avère moins facile que prévu, mais une possibilité d'arrêter la migration apparaît. Enfin, dans le chapitre 7, nous étudions le cas de Jupiter et Saturne, et trouvons dans quelles conditions les interactions entre les deux planètes en empêchent la migration
Le, Boucher Caroline. "Facteurs de pérennisation d'un réseau de formation par les pairs : le cas des Réseaux d'Echanges Réciproques de Savoirs." Thesis, Rennes 2, 2015. http://www.theses.fr/2015REN20048/document.
Повний текст джерелаSocial innovation stands up with difficulty to the test of time. While most experiments run down and disappear quickly, some of them perpetuate. The case of knowledge exchanges networks between peers raises other questions. Whether in the case of learning networks, of communities of practice, of collaborative devices, of Massive Open Online Courses (MOOCs), of mutual help groups or fo training by peers, these networks are particularly subject to change according to needs, according to content updating or to commitments. How are these devices characterized? What are their actors’ logics in order to make them perpetuate? Can we bring to light, from their analysis, some factors of perpetuation? Our doctoral thesis tries to provides some answers to these questions, through the example of knowledge exchanges networks. We present research studies about peer training after having described their different forms since the 19th century, in a socio-historical perspective. Based on a methodology inspired from grounded theory, this thesis articulates research studies from the organisational sociology with the socio-technical approach of training. The case of knowledge exchanges networks brings to light the role of shared values, of conceptions, of narratives, of expectations, of types of organisation and of tools that forge a national identity, combined with local forms of appropriation of these components that allow to reinvent the sense of actions and practices
Talérien, Jean Stéphane. "Le développement professionnel des enseignants expérimentés par la transmission explicite de pratiques entre pairs." Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0037/document.
Повний текст джерелаThe international scientific literature shows the reality of teachers' informal learning in the workplace, within schools. However, these learnings have several limitations and are of lower quality than those that are carried out in an organized environment. The purpose of this research is precisely the professional development of experienced teachers through a professional development program that considers their informal learning.This study is part of an anthropocultural research program (Bertone, 2011; Chaliès, 2012) whose main theoretical assumptions are borrowed from the philosophy of ordinary language (Wittgenstein, 2004). It was conducted within the framework of two innovative training devices allowing an experienced teacher (the peer trainer) to ostensibly teach one of his specific practices considered effective to an experienced peer teacher (the trained peer). The main research results show the modelling of the professional activity of peer trainers and thus contribute to documenting international research on informal learning by primary school teachers. They also show the learning of new professional practices from trained peers understood as the acquisition of new rule systems. Finally, the results show the professional development of the trained peers understood as the interpretation of the rules learned in new circumstances as well as the reflexive development of the professional activity of the trained peers
Fousson, Eric. "Formation de diamants par voies dynamiques et leur caractérisation." Mulhouse, 2000. http://www.theses.fr/2000MULH0623.
Повний текст джерелаLesaffre, Françoise. "Formation d'agrégats d'aérosols : expériences, analyse fractale et simulations." Paris 7, 1990. http://www.theses.fr/1990PA077244.
Повний текст джерелаAalders, Cynthia Yvonne. "Catharine Parr Traill a grounded spirituality /." Online full text .pdf document, available to Fuller patrons only, 2001. http://www.tren.com.
Повний текст джерелаOngmayeb, Gisèle. "Formation de capsules par réticulation interfaciale et caractérisations." Nantes, 2008. http://www.theses.fr/2008NANT2085.
Повний текст джерелаThis thesis relates to the formation of capsules by interfacial cross-linking between a biodegradable polysaccharide, the chitosan and a cross linked agent. The objective is to form capsules containing a lipophilic core under soft chemical conditions to encapsulate active ingredients such as the enzymes and the perfumes. We chose a crosslinking agent less reactive than dichlorides of acid and which is soluble in an oil to avoid the use of organic solvents. The capsules are formed in a chitosan solution with pH 6. The method of formation of the capsules is also softer because it makes it possible to form capsules drop by drop with a moderate agitation. Several techniques of characterization were used to determine the properties of the formed capsules. The solid NMR 13C made it possible to determine the chemical structure of the membranes of chitosan cross linked. The study of the mechanical resistance on the capsules showed that capsules have the viscoelastic properties. A homogeneous thickness and a smooth structure of the membrane were observed in SEM and microscopy confocal, which showed the absence of porosity. The use of the liquid chromatography (HPLC), made it possible to showed the impermeability properties of the capsules membranes by using a lipophilic compound δ-tocopherol from where a release of the substance by mechanical rupture of the membrane. Finally, we showed that it is possible to control the formation of capsules by interfacial cross linking and to modulate their properties
Samson, Hervé. "Formation d'enchaînements siloxanes par un procédé non hydrolytique." Montpellier 2, 1992. http://www.theses.fr/1992MON20285.
Повний текст джерелаLévêque-Simon, Kévin. "Collisions assistées par laser pour la formation d'antimatière." Thesis, Strasbourg, 2020. http://www.theses.fr/2020STRAE015.
Повний текст джерелаThe GBAR experiment aims at measuring the free fall of ultra-cold antihydrogens (neV).This implies the production of antihydrogen ions, which are obtained by two charge exchange reactions involving antiprotons and positronium atoms. The goal of this study is to analyse the possibility to increase the production rates of the antihydrogens and the antihydrogen ions produced, by assisting the two reactions with a laser. The cross sections are obtained in the antiproton energy range of the GBAR experiment (1 - 10 keV), by using a semi-perturbative approach proposed by Byron and Joachain. This method,simultaneously, allows the description of electron-atom interaction (Coulomb Born Approximation or Continuum Distorted Waves - Final State), the electron-laser interaction (Volkov states), and the laser-atom interactions (first order time dependent perturbation theory). The positronium excitation from the 1s state by one-photon virtual transition process is studied, by considering lasers whose wavelengths are around 243 nm (Lyman-αline). It is then proposed to adapt these laser sources in order to excitate 3s and 3d states (Paschen-β). The Doppler shifts resulting from the positronium cloud velocity distribution are taken into account as well, at the confinement energies of 25 meV and 48 meV. Finally,the number of antiparticules produced is estimated. Compared to the case of non-assisted collisions, the losses induced by the photo-ionization and photo-detachment processes are evaluated
Saint-Georges, Theillaud Monique. "Formation des professeurs de sciences physiques par la didactique." Paris 7, 1996. http://www.theses.fr/1996PA070039.
Повний текст джерелаThis thesis aims at formulating a didactic training for student teachers of physics in their second year of teacher training college (iufm : institut universitaire de formation des maitres) and at studying its implementation. The module of didactic training, in responding to a prospective and critical orientation, rests on a strong link between theoritical courses and practical training. Student teachers are requiered to work together on a unit of practical work in physics, different from the ones they usually do, to put it into practice with their pupils and, subsequently, to evaluate its results. The corpus is based on two years of student teachers. It includes the transcripts of seminars at the iufm, of practical work units carried out and the transcripted by the student teachers themselves, as well as their written analyses. The result of the training, the pertinence of the methodes used, are assessed according to the professionnal skills students are expected to attain (identification of the problems pupils are confronted with, reflexion on their teaching practice). The analysis of the corpus establishes the existence of correspondances with these criteria but also a discrepancy that may not be reduced by a few hours of theorical training. To understand this phenomenon, a new analysis of the corpus leads to expose the conceptions underlying the student teachers' practices. Two components must be taken into account, an epithemological and a pedagogical one. Their study made it possible to focus on core elements likely to make that aspect of teacher training evolve
Renou, Franck. "Formation et réactivité de la paire électron solvaté-métal alcalino-terreux bivalent dans le tétrahydrofuranne : étude par radiolyse impulsionnelle." Paris 11, 2002. http://www.theses.fr/2002PA112222.
Повний текст джерелаThe reactivity of solvated electrons toward magnesium salts, and more generally, toward earth-alkaline metals has not yet been studied until those days. For magnesium, the formation of the unusual valence state is of interest because its nature and properties are at the center of mechanistics models on the formation of Grignard reagents, or organomagnesians, by which the metallic magnesium (valence 0) becomes divalent. We have conducted series of experiments in order to characterize this species by following the reaction of divalent magnesium salt (chloride or perchlorate) toward solvated electron generated by pulse radiolysis in tetrahydrofuran and some solvents for comparison. We showed experimentally and theoritically that there is formation of a pair solvated electron - metallic ion. This pair is obtained with perchlorates salts, then we followed its decay lasting few hundreds nanoseconds with a first order kinetic. This transient, whatever that would be the metal, has a broad spectrum which is composed by two bands around 1000 nm. It indicates the presence of a pair rather than a monovalent cation. SCF calculations confirmed it was the formation of a pair. This solvated electron - cation pair, even it has a short time life, has its own reactivity. We observed its capacity to reduce aromatic molecules (biphenyl, anthracen, chrysen, phenanthren and tetracen) and so we have estimated its redox potential which is include between - 2. 8 and - 2. 6 V_HNE. Furthermore, we brought out the reduction of alkyle halide (alkylic, phenylic and benzylic compounds) by the pair and the break of carbon-halogen bond which is corresponding to a step in the synthesis of Grignard reagents. In all cases, we determined mechanisms and kinetics of these different reactions
Denis-Remis, Cédric. "Approche de la maîtrise des risques par la formation des acteurs." Phd thesis, École Nationale Supérieure des Mines de Paris, 2007. http://tel.archives-ouvertes.fr/tel-00239213.
Повний текст джерелаBronikowski, Monié Martine. "Contribution à l’étude qualitative de l’alternance éducative des Modules de Re préparation à l’Examen par Alternance (MOREA) : les conditions de la réussite." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL12015.
Повний текст джерелаThis research work is based on the qualitative study of an alternated training initiative proposed by the General Mission of Insertion of the Department of Education: the Module of Re preparation in the Examination by Block Release Training. Indeed, this course in alternation with a school and one or several companies, addresses young people having failed to a diploma, without possibility of redoubling in initial training. This training initiative leading to a qualification, which exists since 1986, was never, in our knowledge, analyzed in a qualitative way. The work of collection of data was realized on two regional education authorities (Lille and Reims) and concern six groups of pupils in MOREA that is ninety three pupils. The study leans on questionnaires, conversations and current observations and appeals to the structural analysis recommended by Claude Dubar and Didier Demazière for the analysis of the conversations. We observed in our study that in spite of past difficulties at school, these young people pass the set examinations, globally, as well as those with without past difficulties. The question arises about what takes place as significant during this year of training to allow these students to regain a taste for learning and to pass their diploma? The variable of block release training seems to be at the heart of this apparent success. The study reveals that the constructions of the learning paths of block release course plays a major role in the success of learners
Allouche, Lionel. "Etude par RMN des mécanismes de formation par hydrolyse des polycations d'aluminium." Université Louis Pasteur (Strasbourg) (1971-2008), 2001. http://www.theses.fr/2001STR13222.
Повний текст джерелаVeillard, Laurent. "Rôle des situations professionnelles dans la formation par alternance : cas des élèves-ingénieurs de production de l'ISTP de Saint-Etienne." Lyon 2, 2000. http://theses.univ-lyon2.fr/documents/lyon2/2000/lveillard.
Повний текст джерелаThis work investigates the role of professional situations in the development of student-engineer's knowledge, within a sandwich course. Our study is carried out in a vocational school, at the tertiary level. This school (ISTP de Saint-Etienne France), trains engineers in charge of industrial production. The teaching is organised as a sandwich course, alternating periods at school, an periods in a firm. During this training course, students have to manage a large-scale project to improve the socio-technical organisation of the manufacturing units of the firm. To study the impact of professional situations in developing students' vocational abilities, we have developed a theorical framework on the basis of some aspects of activity and action theories (Rasmussen, Leontiev, Thévenot). This theoritical framework also uses the concept of milieu" proposed by the french didactician Brousseau. From a methodological point of view, we have chosen the case study. Two complementary levels of analysis are used to study the activity of two students. The first level (the global level of analysis), reconstitutes the students' activity during the 3 years of their training course. Whereas the second level (the local level analysis), focuses more closely upon a 5 days period situated in the middle of the training course. Our results show the consistency and the complementarity of these two levels in studying the students' activity. This study also shows that the students have gained two different types of expertise at the end of that training. We stress some important factors that explain this difference: (1) The socio-technical organisation of the firms, (2) The students' "location" in this organisation (from both hierarchical and functional point of view), (3) The type of project, (4) The two tutors role (school tutor and firm tutor), all of which play an important part in the development of some specific types of professional knowledge
L'Huillier, Benjamin. "Formation des galaxies : rôle de l'accrétion du gaz." Paris 6, 2011. http://www.theses.fr/2011PA066663.
Повний текст джерелаRieben, Pierre. "Processus de conception d'instruments et de dispositifs de formation : Le cas de la formation ouverte et à distance." Bordeaux 2, 2008. http://www.theses.fr/2008BOR21527.
Повний текст джерелаWe can consider that, since a year, the open and distance learning has gone beyond the stage of projects and tests pilote. To understand and discribe the design process of devices and tools for learning and teaching, to problematize the relations of learning, teaching and the relationship to knowledge in the case of open and distance learning, a triple examination has been commited (research in literature, study of three corpus, field study about the design of an e-portfolio. It's allowed to identify some queries. 1) the design process goes on into the use process which leads to ask again initial design ; 2) The representations that have structured the design of the e-portfolio also structured the group of design'actors - according to the hypothesis of Sallaberry ; 3) From Salais and Storper (coordinated action means that the actors have a common framework for action, but outside them likely to be re-built during the action), we have shown that the design of an e-portfolio as aprocess of coordinated action, based on agreements on coordinating the work of design ; 4) Considering artefacts developed in a process of design as objects intermediaries - according to the type of Jeantet and Vink -, we have identified, from the field study about the e-portfolio design process, as symbolic interfaces for structuring representations ans agreements actors on this design process ; 5) Looking after if it was relevant to consider the "report to know instrumented" notion, we have show that the use of an instrumentation in learning's field has an influence on the relationship to knowledge
Ford, Zachary K. "Peripheral Mechanisms Behind the Formation of Chronic Pain and Itch." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613752899193811.
Повний текст джерелаSerradas, Rosa. "La formation continue des enseignants au Portugal (1992-2002) : contraintes et paradoxes engendrés par le lien entre crédits de formations et progression dans la carrière." Lyon 2, 2007. http://theses.univ-lyon2.fr/documents/lyon2/2007/duarte_r.
Повний текст джерелаAfter the 25th April Revolution in 1974, which turned Portugal into a democratic country, the Portuguese educational system had be reorganized to adapt itself to a new reality. In the present thesis we aim at clarifying a question related to a new system of In-service Teacher Training implemented in Portugal in 1992. This system of In-service Teacher Training is closely connected to the progression in the teachers’ career. It means that the teachers need to gather a certain number of certified hours of training to obtain the corresponding number of credits to progress in the career. The implementation of this system was negotiated with the Teachers’ Trade Unions and at the same time it answered past demands of the class. The Teachers’ Trade Unions welcomed those new measures and assumed an important role in the process that led to the new law. After the ‘mise en place’, the teachers reacted negatively, not to the training, but to the system of credits. The Teachers’ Trade Unions soon joined this movement and conducted a process to demand the end of the system of credits. The research we have done aimed at understanding the roles of the different people involved in the process and the reasons of the Teachers’ Trade Unions to contest the system of credits. The methodology chosen was qualitative and the main documents used were interviews and printed materials
Serradas, Rosa Develay Michel. "La formation continue des enseignants au Portugal (1992-2002) contraintes et paradoxes engendrés par le lien entre crédits de formations et progression dans la carrière /." Lyon : Université Lumière Lyon 2, 2007. http://demeter.univ-lyon2.fr/sdx/theses/lyon2/2007/duarte_r.
Повний текст джерелаBoucher, Aymeric. "Modélisation de la formation des polluants au sein des foyers aéronautiques par une méthode de chimie tabulée." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2015. http://www.theses.fr/2015ECAP0006/document.
Повний текст джерелаThe reduction of pollutant emissions of aeronautical combustion chambers is a major issue for engine manufacturers. In order to support them in this task, it is necessary to develop numerical simulation tools able to predict accurately chemical species emissions at the chamber outlet. To achieve this, a detailed description of the chemical reactions is necessary. Nevertheless, considering the current computer capabilities, this description is not presently affordable. This is why the use of chemistry reduction methods preserving the capability to predict pollutants species is necessary. The method of tabulated chemistry is a good candidate to tackle these problems and therefore is used as the basis of model developments achieved in the framework of this PhD thesis. A preliminary work has been made to select in the literature tabulated chemistry methods applying to turbulent reactive two-phase flows. The technique to create the chemical tables has been improved in order to take into account the effect of the residence time of the burnt gases on nitrogen oxides formation. The coupling of the method with a soot model has also been achieved. The tabulated chemistry gives access to the concentration of soot precursors and oxidizers, quantities which are required by the model used for the soot prediction. The developed tabulated chemistry model has been applied to the simulation of a configuration representative of aeronautical combustors. The concentration of nitrogen oxides, soot particles, carbon monoxide and unburnt hydrocarbons predicted by the numerical simulations have been compared to experimental results. The topology of the soot volume fraction field and the shape of pollutant concentrations profiles at the outlet agree quite well with the experiments. Nevertheless, concentration levels obtained from the simulations differ from the experimental results. This can be imputed to the error in the prediction of the temperature field that is independent of the combustion model, since a similar error was observed with another combustion model