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Ottone, Myrlene de Oliveira. "S?ntese de ?steres versus eterifica??o e de 1,3 e 1,5-dioxolanas versus condensa??o, catalisadas pelo catalisador amorfo e hidrof?lico, SiO2-SO3H". UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1430.
Pełny tekst źródłaData de aprova??o retirada da vers?o impressa do trabalho.
Palavras-chave ausentes no Resumo/Abstract.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
O SiO2-SO3H ? um catalisador heterog?neo, sintetizado a partir de areia de constru??o e carbonato de s?dio, o qual, vem se mostrando eficaz nas s?nteses org?nicas. No presente trabalho, esse catalisador foi usado na s?ntese de ?steres benz?licos e fen?licos, realizada em apenas uma ?nica etapa, com rendimentos entre 80 e 95%. E devido a esse alto rendimento, foi tamb?m realizado rea??es de cetaliza??es, utilizando glicerol, 2,2-dimetil-1,3-propandiol e 1,1,1-hidroximetil-propanol e diversas cetonas. As rea??es com o glicerol apresentaram rendimentos baixos, por ser uma esp?cie muito polar e interagir com os poros da s?lica, evitando a colis?o com as mol?culas de cetonas. Diante desses resultados, foi poss?vel produzir um catalisador heterog?neo que al?m de diminuir o impacto ambiental, carrega caracter?sticas ben?ficas e eficientes para s?ntese org?nica, poss?vel se tonar eficaz para futuras rotas sint?ticas.
Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016.
The SiO2 - SO3H is a heterogeneous catalyst synthesized from building sand and sodium carbonate. It has proven to be effective for organic syntheses. In study the catalyst was used in the synthesis of benzyl esters and phenolics and the yields between 80 and 95%. And the high yield was also performed cetaliza??es reactions using glycerol, 2,2- dimethyl- 1,3- propandiol and 1,1,1 -hydroxymethyl- propanol and various ketones. The reactions with glycerol had low yield justified very polar species and interact with the pores of silica, avoiding collision with ketone molecules. These results it was possible to produce a heterogeneous catalyst in addition to reducing environmental impact, carries beneficial and efficient features for organic synthesis. It can be effective tonar for future synthetic routes.
Charlet, Gabriel. "Etude des formats de modulation et des méthodes de détection pour les transmissions multiplexées en longueurs d'ondes sur fibre optique au débit de 40Gb/s et 100Gb/s". Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00769923.
Pełny tekst źródłaPaschos, Konstantinos. "Role of condensin in transcriptional silencing and management of the rDNA array in S. cerevisiae". Thesis, Queen Mary, University of London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412758.
Pełny tekst źródłaAbboud, Benaïssa. "Étude des propriétés de surface des cristaux ferroélectriques de T. G. S. , de NaNO2 et de G. A. S. H". Nantes, 1992. http://www.theses.fr/1992NANT2008.
Pełny tekst źródłaGerát, Mário. "Návrh zemního tepelného čerpadla s přímým výparem chladiva". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401542.
Pełny tekst źródłaStudýnka, Radim. "Modely a analýzy v kontejnmentovém systému s potlačením tlaku při haváriích s únikem chladiva". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231495.
Pełny tekst źródłaLi, Qi 1976. "Competing orders in s-wave and p-wave superconductors". Thesis, University of Oregon, 2008. http://hdl.handle.net/1794/8285.
Pełny tekst źródłaThis dissertation investigates the interplay between, and the possible coexistence of, magnetic and superconducting order in metals. We start with studying the electromagnetic properties of s-wave superconductors near a ferromagnetic instability. By using a generalized Ginzburg-Landau theory and scaling arguments, we show that competition between magnetic order and superconducting order can change the scaling of observables. For instance, the exponent for the temperature dependence of the critical current can deviate from the Ginzburg-Landau value of 3/2. These results may be relevant to understanding the observed behavior of MgCNi 3 . We then study the nature of the superconductor-to-normal-metal transition in p-wave superconductors. Although the phase transition is continuous at a mean- field level, a more careful renormalization-group analysis in conjunction with large-n expansion techniques strongly suggest that the transition is first order. This conclusion is the same as for s-wave superconductors, where these techniques also predict a first-order transition. In p-wave superconductors, topological excitations known as skyrmions are known to exist in addition to the more common vortices. In the third part of this dissertation, we study the properties of skyrmion lattices in an external magnetic field. We propose iv experiments to distinguish vortex lattices from skyrmion lattices by means of their melting curves and their μSR signatures.
Adviser: Dietrich Belitz
Chen, Xuejun Luna. "Crystallographic, magnetic and optical properties of I2. Mn.IV.VI4. compounds with I = Cu, log., IV-Si, GE, Sn and VI =S, Se, Te". Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6626.
Pełny tekst źródłaPavlů, Jaroslav. "Vývoj výpočetního modelu a metodiky pro výpočet kondenzátorů s minikanálky". Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-233994.
Pełny tekst źródłaMarinho, Andr? Afonso Ara?jo. "Aplica??es da q-?lgebra em f?sica da mat?ria condensada". Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16631.
Pełny tekst źródłaCoordena??o de Aperfei?oamento de Pessoal de N?vel Superior
We address the generalization of thermodynamic quantity q-deformed by q-algebra that describes a general algebra for bosons and fermions . The motivation for our study stems from an interest to strengthen our initial ideas, and a possible experimental application. On our journey, we met a generalization of the recently proposed formalism of the q-calculus, which is the application of a generalized sequence described by two parameters deformation positive real independent and q1 and q2, known for Fibonacci oscillators . We apply the wellknown problem of Landau diamagnetism immersed in a space D-dimensional, which still generates good discussions by its nature, and dependence with the number of dimensions D, enables us future extend its application to systems extra-dimensional, such as Modern Cosmology, Particle Physics and String Theory. We compare our results with some experimentally obtained performing major equity. We also use the formalism of the oscillators to Einstein and Debye solid, strengthening the interpretation of the q-deformation acting as a factor of disturbance or impurity in a given system, modifying the properties of the same. Our results show that the insertion of two parameters of disorder, allowed a wider range of adjustment , i.e., enabling change only the desired property, e.g., the thermal conductivity of a same element without the waste essence
Abordamos a generaliza??o das quantidades termodin?micas q-deformadas atrav?s da q-?lgebra que descreve uma ?lgebra generalizada para b?sons e f?rmions. A motiva??o para o nosso estudo surge do interesse de fortalecer nossas id?ias iniciais, a fim de propor uma poss?vel aplica??o experimental. Em nossa jornada, conhecemos uma generaliza??o recentemente proposta ao formalismo do q-c?lculo, que ? a aplica??o de uma seq??ncia generalizada, descrita por dois par?metros de deforma??o reais positivos e independentes q1 e q2, conhecidos por osciladores de Fibonacci. Aplicamos ao conhecido problema do diamagnetismo de Landau imerso em um espa?o D-dimensional, que ainda gera boas discuss?es por sua natureza, e a depend?ncia com o n?mero de dimens?es D, nos possibilita futuramente estendermos a sua aplica??o para sistemas extra-dimensionais, tais como a CosmologiaModerna, a F?sica de Part?culas e Teoria de Cordas. Comparamos nossos resultados com alguns obtidos experimentalmente, apresentando grande equival?ncia. Aplicamos ainda o formalismo dos osciladores aos s?lidos de Einstein e Debye, fortalecendo ? interpreta??o da q-deforma??o atuando como um fator de perturba??o ou impureza, num determinado sistema, modificando as propriedades do mesmo. Nossos resultados mostram que a inser??o de dois param?tros de desordem, possibilitaram uma maior faixa de ajuste, ou seja, possibilitando alterar apenas a propriedade desejada, por exemplo, a condutividade t?rmica de um elemento sem que o mesmo perca sua ess?ncia .
Sklenářová, Lenka. "Možnosti aplikace systémů s akumulací tepla v jaderné energetice". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230557.
Pełny tekst źródłaPluške, Zbyněk. "Možnosti zvyšování jaderné bezpečnosti pro koncept pasivního systému s ledními kondenzátory v případě LOCA hávárie". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230441.
Pełny tekst źródłaGuérin, Thomas. "Rôles des télomères internes et des condensines dans la cassure des chromosomes dicentriques par la cytodiérèse chez Saccharomyces cerevisiae". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS581/document.
Pełny tekst źródłaTelomeres ensure chromosome end stability. Failure to do so would lead to chromosome end fusions and the formation dicentric chromosomes (i.e. chromosomes with two centromeres) that are unstable in mitosis. Dicentrics are a threat to cell viability and a source of extensive mutagenesis. In Saccharomyces cerevisiae, dicentrics formed by telomere fusion preferentially break at the fusion. This unexplained process allows the recovery of a normal karyotype and protects the genome from the detrimental consequences of accidental telomere fusions. Here, I address the molecular basis of this rescue pathway. Simple tandem arrays tightly bound by the telomere factor Rap1 or a heterologous high-affinity DNA binding factor are sufficient to establish breakage hotspots, mimicking telomere fusions within dicentrics. I also adress the mechanism allowing breakage at pericentromeric regions when dicentric do not bear telomeric sequences. During anaphase, Condensins generate forces sufficient to rapidly relocalize the centromeres to the bud neck and refold dicentrics prior their breakage by cytokinesis. This relocalisation is essential for breakage at pericentromeres. Moreover Condensin-dependent refolding is essential to the preferential breakage at telomere fusions, more generally at Rap1-bound arrays and which delimit insulated chromosomal domains. Thus, the rescue of fused telomeres results from a Condensin- and Rap1-driven chromosome conformation that favours fusion entrapment where the septum closes. These results suggest that Rap1-bound telomere sequences stall loop-extrusion by Condensins. In addition, this work provides a new and direct way to monitor Condensin activity on chromatin in live cells. It also shows that dicentric chromosomes are broken during septation and that cytokinesis is not delayed by chromatin bridges
Týč, Matěj. "Numerické metody zpracování obrazů z mikroskopu s rotujícím kondenzorem". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228241.
Pełny tekst źródłaKone, Marihouma. "Évaluation du potentiel agronomique de fourrages riches en tanins condensés ou en lactones sesquiterpènes dans quatre régions du Québec". Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/36620.
Pełny tekst źródłaThe objective was to evaluate the agronomic potential, namely establishment, winter survival, biomass production, and nutritive value of novel forage species with a high content of condensed tanins or sesquiterpene lactones grown in pure stand or in mixture with two forage grasses, timothy (Phleum pratense L.) and meadow fescue (Festuca pratense Huds.), under pasture management in four climatic regions of Quebec. The field experiment took place in Sainte-Anne-de-Bellevue (Montreal region), Saint-Augustin-de- Desmaures (Capitale-Nationale region), La Pocatière (Bas-Saint-Laurent region), and Normandin (Saguenay-Lac-Saint-Jean region), over two years (2016 and 2017). At all study sites in 2017, chicory (Cichorium intybus L.) and birdsfoot trefoil (Lotus corniculatus L.) had satisfactory yields compared to alfalfa at all sites, while sainfoin (Onobrychis vicifolia Scop.) did not perform well. Sainfoin had the highest content of condensed tanins (average of 10.7 g kg-1 dry matter) and moderately and slowly degradable proteins.
Horvath, Christophe. "Réalisation de nanofils de protéines". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00647308.
Pełny tekst źródłaVidal, Julien. "Ab initio Calculations of the Electronic Properties of CuIn(S,Se)2 and other Materials for Photovoltaic Applications". Phd thesis, Ecole Polytechnique X, 2010. http://tel.archives-ouvertes.fr/tel-00544395.
Pełny tekst źródłaAbele, Miguel. "Phase diagram for the S equals one-half and J equals three-halves Kondo lattice model". Diss., Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/530879.
Pełny tekst źródłaPh.D.
A Kondo lattice Hamiltonian for arbitrary total angular momentum J is formulated using a pseudofermion representation and without addition of RKKY interaction terms. An Hartree-Fock treatment is applied, and both variational and Green's function methods are used to calculate physical quantities from the linearized Hamiltonian. The Kondo phase is represented by finite hybridization. Magnetic ordering is examined via ordering vectors, but coexistence with the Kondo phase is not allowed. Phase diagrams are produced in S=1/2 and J=3/2 with second-order transitions at Kondo-paramagnetic and magnetic-paramagnetic boundaries, and first order transitions between Kondo and magnetic phases. Various coupling strengths are explored. Magnetic phases found include antiferromagnetism, ferromagnetism, and spin-density wave ordering of both commensurate and incommensurate varieties. In S=1/2, the magnetic phase exhibits a spike in critical temperature at half-filling. In J=3/2, the Kondo phase is reentrant at weaker coupling but not at stronger coupling.
Temple University--Theses
Boyer, Bruno. "Etude des J/psi dans le canal dimuon du spectromètre de l'expérience ALICE auprès du LHC dans les collisions proton+proton à sqrt(s) = 7 TeV". Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00662272.
Pełny tekst źródłaGuzman-Verri, Gian Giacomo. "Electronic Properties of Silicon-based Nanostructures". Wright State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1158515644.
Pełny tekst źródłaRihn, Sandra. "Construction et étude de composés fluorescents à base d'unités hydroxyphényl-s-triazines et boradiazaindacènes". Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-01018647.
Pełny tekst źródłaBianchi, Livio. "J/ψ polarization in pp collisions at √s = 7 TeV with the ALICE muon spectrometer at the LHC". Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00688321.
Pełny tekst źródłaJubert, Pierre-Olivier. "Croissance et propriétés magnétiques de nanostructures épitaxiées auto-assemblées : le système Fe/Mo(110)". Phd thesis, Université Joseph Fourier (Grenoble), 2001. http://tel.archives-ouvertes.fr/tel-00004054.
Pełny tekst źródłaRoa, Romero Diego Alejandro. "Etude des désintégrations sans charme Bº d,s → h+h′−πº decays dans LHCb". Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2013. http://tel.archives-ouvertes.fr/tel-00872114.
Pełny tekst źródłaBach, Thi Thuy Ha. "Evolution physico-chimique des liants bas PH hydratés : influence de la température et mécanisme de rétention des alcalins". Phd thesis, Université de Bourgogne, 2010. http://tel.archives-ouvertes.fr/tel-00688015.
Pełny tekst źródłaJohann, Lussange. "Energie de Casimir et transfert thermique radiatif entre surfaces nanostructurées". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00879989.
Pełny tekst źródłaFauque, Lydia. "Mécanismes Moléculaires de la Condensation Mitotique des Chromosomes chez la levure Schizosaccharomyces pombe". Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10179/document.
Pełny tekst źródłaFrom yeasts to human, Condensin is essential for mitotic chromosome condensation. However, how Condensin binds to chromatin and, in this context, shapes mitotic chromosome remain poorly understood. Mappings performed from yeasts to mouse have revealed that condensin is enriched near highly expressed genes along chromosome arms, suggesting that as yet identified features associated with transcription take part in condensin binding to chromatin. To identify factors that collaborate with Condensin we performed a synthetically lethal genetic screen in fission yeast. We searched for mutants that are alive when Condensin is fully functional but dead when Condensin is partly defective. We identified 7 proteins never known for their roles in the mitotic condensation, such as some chromatin remodelling and some transcription factors. All these results were consistent with a link between condensation and transcription. Among theses 7 proteins, we found Gcn5, which encodes a conserved HAT, well known for the role it plays as a transcriptional co-activator. Gcn5 binds to gene promoters where it acetylates mainly H3K9, K14 and K18, and its occupancy correlates with transcription rates. Remarkably, although the bulk of chromatin is de-acetylated and Gcn5 reduced from chromatin upon mitosis entry, traces of Gcn5 dependant H3K9 acetylated persist at condensin binding sites. Here, we provide evidence that Gcn5-mediated histone H3 K9 acetylation could assist the binding of Condensin to chromatin
Berretil, Slimane. "Proprietes electroniques des semi-conducteurs magnetiques gamo : :(4)s::(8), gamo::(4)se::(8), gamo::(4)se::(4)te::(4) et ganb::(4)s::(8)". Paris 6, 1987. http://www.theses.fr/1987PA066262.
Pełny tekst źródłaVaugier, Loig. "Mat��riaux Corr��l��s et Structure Electronique ab initio : interaction de Hubbard et couplage de Hund". Phd thesis, Ecole Polytechnique X, 2011. http://tel.archives-ouvertes.fr/tel-00730341.
Pełny tekst źródłaYu, Zeming. "Fabrication d'un nouveau substrat bi-métallique Cu-Ni et dépôt de films de La2Zr2O7 (LZO) sur substrat métallique par procédé chimique en solution". Phd thesis, Université Joseph Fourier (Grenoble), 2008. http://tel.archives-ouvertes.fr/tel-00376983.
Pełny tekst źródłaStaresinic, Damir. "Contribution à l'étude des excitations de basse énergie dans les systèmes quasi-unidimensionels". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10221.
Pełny tekst źródłaBombardi, Alessandro. "Localisation électronique et magnétisme dans les monochalcogénures et les monopnictures de l'uranium et du neptunium : étude des systèmes UxLa(1-x)(S,Se), U0.2(La0.15Y0.85)0.8Te et NpAs(1-x)Se(x)". Université Joseph Fourier (Grenoble), 2001. http://www.theses.fr/2001GRE10031.
Pełny tekst źródłaVacinova, Jitka. "Etudes structurales des oxydes de platine par les méthodes de diffusion anomale et de D. A. F. S". Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10185.
Pełny tekst źródłaMallégol, Stéphane. "Caractérisation et application de matériaux composites nanostructurés à la réalisation de dispositifs hyperfréquences non réciproques". Phd thesis, Université de Bretagne occidentale - Brest, 2003. http://tel.archives-ouvertes.fr/tel-00004319.
Pełny tekst źródłaPaula, Priscila Marques Naves de. "Análises das propriedades ópticas, morfológicas e estruturais de pontos quânticos de PbS sintetizados a partir de diferentes concentrações de dopantes". Universidade Federal de Uberlândia, 2006. https://repositorio.ufu.br/handle/123456789/15662.
Pełny tekst źródłaPbS quantum dots has been grown in oxide glasses by two distinct methodologies according to the dopants, using the fusing method at 1200ºC. The host glass matrices used were SNAB (SiO2.Na2CO3.Al2O3.B2O3) and SNABP (SiO2.Na2CO3.Al2O3.B2O3.PbO2), with PbS bulk and S (sulphur) added as dopants, respectively. Thermal treatments were applied in a systematic way in order to allow a controlled growth of quantum dots. Different experimental techniques were realized in order to study the growth kinetic of dots as a function of thermal treatment times and dopant concentrations. It was analyzed thermal properties of the glass matrices by Calorimetry Scanning Diferencial (DSC). Many techniques have allowed discussion of the optical properties by Optical Absorption (OA) and Photoluminescence (PL), morphologic properties by Atomic Force Microscopy (AFM), and structural properties by X-Ray Diffractometry (DRX) of the nanocrystals. Qualitative and quantitative analyse of the chemical composition of the samples has been possible by spectrometry of Fluorescence of Raios-X (FRX). Using the ] 4 4 [ . × p k r r method we were able to estimate the avarage diameter of the PbS quantum dots. Calculations of dispersion sizes of PbS quantum dots, from the AO bands, has been presented. We have found the dependence between the quantum dot gap and the dopant concentrations. The relation between the Stokes Shift and the average size of the PbS quantum dots was also presented. Through the previous results, we have defined the methodology referring the host glass matrix SNABP with S bulk added as the most favorable to the growth PbS quantum dots with low size dispersion.
Pontos Quânticos de PbS foram sintetizados em vidros à base de óxidos, a partir duas metodologias distintas quanto a dopagens, pelo método da fusão a 1200ºC. As matrizes vítreas hospedeiras utilizadas foram: SNAB (SiO2.Na2CO3.Al2O3.B2O3) e SNABP (SiO2.Na2CO3.Al2O3.B2O3.PbO2), e os dopantes adicionados à elas foram PbS bulk e S (enxôfre), respectivamente. Tratamentos Térmicos variados e adequados foram efetuados nestas amostras para permitir o crescimento controlado dos pontos quânticos de PbS. Com o objetivo de estudar e acompanhar a cinética de crescimento destes pontos em função dos tempos de tratamentos térmicos e das variadas concentrações de dopantes, foram efetuadas várias técnicas de caracterizações. Estas permitiram análises das propriedades térmicas dos vidros por Calorimetria Exploratória Diferencial (DSC); ópticas, por Absorção Óptica (AO) e Fotoluminescência (PL); morfológicas, por Imagens de Microscopia de Força Atômica (AFM); e estruturais, por Difratometria de Raios-X (DRX) dos referidos nanocristais. Análises qualitativas e quantitativas das composições químicas das amostras sintetizadas neste trabalho foram possíveis através da técnica de espectrometria de Fluorescência de Raios-X (FRX). Com o auxilio do método ] 4 4 [ . × p k r r , foi possível estimar o diâmetro médio dos pontos quânticos de PbS. Cálculos de dispersão de tamanhos ξ a partir da largura a meia altura (W) das bandas de AO e discussões sobre a dependência de energia e o tamanho médio dos pontos quânticos foram apresentados e discutidos. Mostrouse graficamente a relação de dependência entre o Gap dos pontos quânticos e as concentrações de dopantes adicionados às matrizes vítreas. Apresentou-se de forma gráfica a relação entre o deslocamento Stokes e o tamanho médio dos pontos quânticos de PbS. A partir de análises dos resultados obtidos, definiu-se então a metodologia correspondente à matriz SNABP dopada com S bulk como sendo a mais favorável para a formação e crescimento dos pontos quânticos de PbS com menor dispersão de tamanhos entre si.
Mestre em Física
Le, Sueur Hélène. "Un AFM-STM cryogénique pour la physique mésoscopique". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2007. http://tel.archives-ouvertes.fr/tel-00261434.
Pełny tekst źródłaAu cours de cette thèse, nous avons développé un microscope permettant d'effectuer la spectroscopie tunnel résolue spatialement (10 nm) de nanocircuits individuels, avec une résolution en énergie inégalée (10 µeV). Cet appareil combine les fonctions de Microscopie par Force Atomique (mode AFM) et de spectroscopie Tunnel locale (mode STM), et fonctionne à 30 mK. Dans le mode AFM, la topographie de l'échantillon est imagée grâce à un diapason en quartz piézoélectrique, ce qui permet de repérer les circuits. La spectroscopie tunnel peut ensuite être faite sur les zones conductrices.
Avec ce microscope, nous avons mesuré la DoS locale dans une structure hybride Supraconducteur-métal Normal-Supraconducteur (S-N-S). Dans un tel circuit, les propriétés électroniques de N et de S sont modifiées par l'effet de proximité supraconducteur. Notamment, pour des fils N courts, nous avons pu observer -comme prédit- la présence d'un gap dans sa DoS, indépendant de la position dans la structure : le “minigap”. De plus, en modulant la phase supraconductrice entre les deux S, nous avons mesuré la modification de ce gap, et sa disparition lorsque la différence de phase vaut π.
Nos résultats expérimentaux pour la DoS, ainsi que ses dépendances en phase, en position, et en longueur de N sont en accord quantitatif avec les prédictions de la théorie quasiclassique de la supraconductivité. Certaines de ces prédictions sont observées pour la première fois.
MONDOLONI, CHRISTIAN. "Contribution a l'etude de la valence anormale de l'ytterbium et du thulium dans yb : :(1-x)tm::(x)se et yb::(1-y)tm::(y)s". Paris 7, 1988. http://www.theses.fr/1988PA077122.
Pełny tekst źródłaAlzetto, Florent. "Contribution à la théorie des gaz de fermions froids". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00808195.
Pełny tekst źródłaLiang, Shaoxiong. "Etude de comportement en fatigue des composites renforcés par fibres végétales : prise en compte de la variabilité des propriétés". Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00841850.
Pełny tekst źródłaANTOINE, Charles. "Contribution à la théorie des interféromètres atomiques". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2004. http://tel.archives-ouvertes.fr/tel-00007967.
Pełny tekst źródłaLošťák, Martin. "Programovatelná osvětlovací soustava pro optický mikroskop". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228217.
Pełny tekst źródłaCapri, Marcio André Lopes. "Aspectos não perturbativos das teorias de Yang-Mills no calibre abeliano maximal". Universidade do Estado do Rio de Janeiro, 2009. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=1373.
Pełny tekst źródłaNeste tese, estudamos os efeitos não perturbativos associados à presença do horizonte de Gribov e à condensação de operadores locais de dimensão dois, numa teoria de Yang-Mills euclidiana em SU(2), quantizada no calibre abeliano maximal. Estes efeitos são introduzidos de modo a preservar as propriedades de renormalizabilidade e localidade da teoria, e refletem-se diretamente no comportamento dos propagadores. A comparação com os dados da rede indicam um bom acordo qualitativo.
In this, we study the nonperturbative effects associated to the presence of the horizon and to the condensation of local dimension two operators in an Eucledean SU(2)Yang-Mills theory quantized in the maximal Abelian gauge. Such effects are introduced in a way to preserve the properties of renormalizability and locality of the theory. The comparison with the lattice data indicates a good qualitative agreement.
Back, Markus. "Out-of-plane Ferromagnetic Resonance (FMR) measurements on magnetic nanoparticle dispersions for biomedical sensor applications". Thesis, Uppsala universitet, Fasta tillståndets fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-410179.
Pełny tekst źródłaRayssac, Olivier. "Étude du collage par adhésion moléculaire hydrophile : application au contrôle de l'énergie de collage". Grenoble INPG, 1999. http://www.theses.fr/1999INPG0163.
Pełny tekst źródłaHydrophilic wafer bonding allows to put in contact two surfaces and to lead, after annealing treatment, to the creation of hydrogen bonds and covalent bonds through the interface. This process is more and more used in microtechnologies and microelectronics, particularly to get SOI structures. The objective of this study was to find the conditions allowing to control the bonding energy of the obtained structures, that is to say either to increase the bonding energy (low temperature applications), either to decrease the bonding energy (high temperature applications). In this way, some characterisation methods have been developed in order to well-understand the physical, chemical and mechanical properties of the bonded structures. Various surface treatments (wet treatments and dry treatments) and various layers (dielectric layers and conductive layers) have been used. We observed the influence of surface microroughness for the SiO2/SiO2 structures too. The increase of the surface microroughness value of each SiO2 surface up to 0. 63 nm RMS allowed to decrease the bonding energy at 1100ºC from 2. 1 J. M-2 to 0. 4 J. M-2. With these results, some tools have been realised to debond the obtained structures. These tools allowed to debond thin wafers (100 μrn) processed on their two sides. Only 2/3 of a 100 mm wafer surface has been debonded. Some improvements have to be brought for arriving at the total debonding of 100 mm and 150 mm wafers surfaces. So, this study highlights a possible diversification of the wafer bonding
Bourdarot, Frédéric. "Etude des structures magnétiques des composés NpX (X=P, Bi, S, Se et Te) et des excitations magnétiques dans U(Ru1-xRhx)2Si2 par diffusion de neutrons". Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10199.
Pełny tekst źródłaNouvelot, Luc. "Evaluation et réalisation de miroirs diélectriques à profil d'indice continu et périodique (filtres rugates)". Grenoble 1, 1993. http://www.theses.fr/1993GRE10069.
Pełny tekst źródłaVolkov, Anton. "Ionic and electronic transport in electrochemical and polymer based systems". Doctoral thesis, Linköpings universitet, Fysik och elektroteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-135429.
Pełny tekst źródłaKernavanois, Nolwenn. "Blocage du moment orbital et hybridation des électrons f : étude par absorption et diffusion de rayons-X et diffraction de neutrons de composés à base d'uranium et de cérium". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10114.
Pełny tekst źródłaTseng, Chang-Ta, i 曾昌達. "A Study on Energy Savings of Using Condenser Water as Heating Source of Constant Temperature and Humidity System". Thesis, 2015. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22103TIT05703081%22.&searchmode=basic.
Pełny tekst źródła國立臺北科技大學
能源與冷凍空調工程系碩士班
103
The condenser water has widely applied in the constant temperature and humidity system heating coil, for example the use heat recovery chiller condenser water matches methods and so on heat interchanger or boiler for the warming heat source already very universal, but the condenser water delivers directly by heating coil to method of the warming actually relatively few. Results in condenser water by this case the temperature to be able to receive the Outside Air temperature to affect, in November ~ in March heating coil ability approximately for design value 30~40%, in April ~ in October heating coil ability approximately for design value 50~60%, although does not have to recycle quantity of heat of completely the condenser water, but 50~60% electric quantity save the time which increases continually to the energy demand, also is an effective energy conservation way. Uses condenser water benefit, not yet installs when the heating coil 1 year institute needs the electric power consumption is the 1,064,640kWh,1 year needs the electrical bill is NT$3,190,000 .After the addition heating coil every year must the power consumption for reduce is the 400,955kWh,1 year needs the electrical bill is NT$1,200,000 , compared previous the year to reduce 62.3% to consume the electricity, compared previous the year to save NT$1,990,000 , the project initial investment cost NT$1,800,000 , the recycling age limit is 0.9 year. The constant temperature and humidity system is an environment which one quite consumes energy, otherwise again the hot part is not uses the electric heating warming is the heat recovery chiller condenser water makes the warming, this is a procedure which quite consumes energy, if will be able to have to deliver originally the condenser water to heat source of recycling use the cooling tower radiation has to the overall system the good energy conservation benefit, competes environment this regarding the present to promote the company competitive power to have the greatest help.
Guihard, Matthieu. "Effets des recuits ultra-rapides (10^5 K/s) sur la formation des siliciures métalliques en phase solide". Thèse, 2015. http://hdl.handle.net/1866/13708.
Pełny tekst źródłaThe synthesis of metal silicides in the form of ultra-thin films remains a major issue in CMOS technology. Controlling the thermal budget to limit dopant diffusion is essential and ultra-rapid annealing techniques are commonly used. In this context, the nanocalorimetry technique is used in situ to study Ni silicides phase formation at heating rate as high as 10^5 K/s. Ni films from 9.3 nm to 0.3 nm are carried out on calorimeters with either a-Si or Si(100) substrate. Ex situ temperature-resolved x-ray diffraction, scanned at low heating rate (3 K/s), is used in order to compare the phase sequence with the ones obtained at ultra-high heating rates. First, the use of c-NC calorimeters equipped with a Si(100) substrate, 340 nm thick, results in a major challenge. An abnormal endothermic signal is measured at high temperature. Results show that microdefects in the SiNx membrane create short circuits between the Pt heating strip of the calorimeter and the metal sample. This phenomenon decreases with the thickness of the metal sample and has no effect below 400 °C. Below this temperature the Si charge carriers are not activated. Then, the heat flow signal was corrected as a function of the temperature with an uncertainty of 12 ° C. In regard to the formation of Ni silicides at ultra-high heating rates, the study shows that the phase sequence is changed. On Si(100) substrate, the metal rich phases such as Ni2Si and theta -phase are no longer detected. Also, a solid state amorphization is favored at the beginning of the reaction. The enthalpies of formation for layers thinner than 10 nm are generally higher, up to 66 %, than those listed in literature for thick layers. Moreover, the calorimetric measurements clearly show an endothermic signal at high temperature, revealing a competition between the reaction of phase formation and the layer agglomeration. For sample annealed at 3 K/s on Si(100), the critical thickness as described by Zhang and Luo, is observed around 4 nm of Ni. A model is proposed in order to explain the increased stability when the layer thicknesses decrease. It is based on the fact that the diffusion of atoms is harder when grain sizes decrease. It also explains why the endothermic signals in nanocalorimetry shift toward higher temperatures when the layer thickness decreases. In addition, a second critical thickness of about 1 nm is noted. Below, it seems that only one phase forms, presumably the NiSi2.