Neste trabalho estudamos o modelo da rede de Kondo em uma rede kagome, buscando uma maior compreensão dos efeitos da frustração geométrica em sistemas de férmions pesados. Para tanto, fizemos uma aproximação de campo médio no hamiltoniano do sistema que serve para todas as fases do sistema. Analisamos inicialmente o caso não magnético. Obtemos neste limite as energias eletrônicas e as funções de Green necessárias ao cálculo numérico autoconsistente das ocupações e do parâmetro de Kondo. Os resultados encontrados estão em concordância qualitativa com trabalhos publicados em outras geometrias. A seguir analisamos o caso magnético, onde introduzimos uma aproximação suplementar, a qual é compatível com a de campo médio já considerada e, em princípio, existente apenas em sistemas com frustração geométrica. Realizamos cálculos autoconsistentes através de somas sobre as frequências de Matsubara. Os resultados mostram que não há coexistência entre ordem magnética e efeito Kondo, além de haver a supressão do antiferromagnetismo com o aumento de temperatura e variações no preenchimento de bandas. / In this work we study the Kondo Lattice model for the kagome lattice, in order to understand better the effects of geometrical frustration in heavy-fermion systems. In this context, we consider a mean field scheme valid for all the system’s phases. Firstly, we analyzed the nonmagnetic case. In this approximation the electron energies and spectral functions are reachable, then we use the density of states to calculate the occupations selfconsistently. Our results are qualitatively compared with previous works in other geometries. In the second part we introduce an approximation for magnestism, which takes into account the mean field scheme considered and the presence of geometrical frustration. Self-consistent calculations are done through the frequencies summation method. Our results show that the magnetism is supressed when the temperature is increased or the band filling deviates from half-filling. Besides, the coexistence of magnetic order and Kondo effect is not observable.

Neste trabalho estudamos o modelo da rede de Kondo em uma rede kagome, buscando uma maior compreensão dos efeitos da frustração geométrica em sistemas de férmions pesados. Para tanto, fizemos uma aproximação de campo médio no hamiltoniano do sistema que serve para todas as fases do sistema. Analisamos inicialmente o caso não magnético. Obtemos neste limite as energias eletrônicas e as funções de Green necessárias ao cálculo numérico autoconsistente das ocupações e do parâmetro de Kondo. Os resultados encontrados estão em concordância qualitativa com trabalhos publicados em outras geometrias. A seguir analisamos o caso magnético, onde introduzimos uma aproximação suplementar, a qual é compatível com a de campo médio já considerada e, em princípio, existente apenas em sistemas com frustração geométrica. Realizamos cálculos autoconsistentes através de somas sobre as frequências de Matsubara. Os resultados mostram que não há coexistência entre ordem magnética e efeito Kondo, além de haver a supressão do antiferromagnetismo com o aumento de temperatura e variações no preenchimento de bandas. / In this work we study the Kondo Lattice model for the kagome lattice, in order to understand better the effects of geometrical frustration in heavy-fermion systems. In this context, we consider a mean field scheme valid for all the system’s phases. Firstly, we analyzed the nonmagnetic case. In this approximation the electron energies and spectral functions are reachable, then we use the density of states to calculate the occupations selfconsistently. Our results are qualitatively compared with previous works in other geometries. In the second part we introduce an approximation for magnestism, which takes into account the mean field scheme considered and the presence of geometrical frustration. Self-consistent calculations are done through the frequencies summation method. Our results show that the magnetism is supressed when the temperature is increased or the band filling deviates from half-filling. Besides, the coexistence of magnetic order and Kondo effect is not observable.

Orientador: Eduardo Granado Monteiro da Silva / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin / Made available in DSpace on 2018-08-09T10:44:24Z (GMT). No. of bitstreams: 1 GarciaFlores_AliFrancisco_D.pdf: 13566833 bytes, checksum: e4298b0e0c3ed24044ce44f96adc43dd (MD5) Previous issue date: 2007 / Resumo: Nesta tese são investigados dois sistemas magneticamente frustrados, a série de compostos isolantes RMn2O5 (R = Eu, Bi, Dy) e o composto intermetálico GdAI3, além do material isolante não frustrado de perovskita dupla Sr2CoUO6. O estudo destes sistemas foi realizado utilizando principalmente a técnica de Espectroscopia Raman e complementado por medidas de susceptibilidade magnética. Para o sistema RMn2O5(R = Eu, Bi, e Dy) apresentamos um estudo dos fônons ópticos de baixa e alta freqüência. Todos os cristais estudados mostraram deslocamentos anômalos nas freqüências dos fônons abaixo de uma nova temperatura característica, T* ~ 60-65 K. O sinal e magnitude dos deslocamentos dos fônons parecem estar correlacionados com o raio iônico de R. Por exemplo, analisando os fônons de alta freqüência, observamos amolecimento dos fônons para R = Bi e um endurecimento para R = Dy, e um comportamento intermediário para R = Eu no intervalo de temperatura entre TC / TN e T*, onde TC e TN são as temperaturas de transição ferrolétrica e antiferromagnética, respectivamente. Já para os fônons de baixa freqüência é observado um amolecimento dos fônons para R = Bi e um endurecimento para R = Eu e Dy na mesma região paramagnética, (TC/TN < T < T* ). Anomalias dos fônons foram também identificadas abaixo de TN ~ 40-43 K, refletindo o início de uma ordem magnética e/ou ferroelétrica de longo alcance da subrede de Mn. Medidas complementares de susceptibilidade magnética dc (x(T)) para o cristal RMn2O5 no intervalo de temperatura entre 2 e 800 K revelaram uma temperatura de Curie-Weiss q CW = -253(3) K, apresentando um grande parâmetro de frustração ( q CW = TN). A curva do inverso de x (T), subtraindo o termo diamagnético, sofre um desvio do comportamento de Curie-Weiss devido a correlações magnéticas abaixo de temperaturas da ordem de ~ qCW . Também, um aspecto interessante é a derivada do inverso da susceptibilidade, a qual mostra pontos de in exfleao a ~ 160 K e ~ T*, sendo esta última, a temperatura abaixo da qual as anomalias dos fônons foram observadas. Estes dados magnéticos dão apoio a nossas interpretações de medidas Raman, onde deslocamentos anômalos de fônons abaixo de T* são associados ao acoplamento spin-fônon, em um cenário de fortes correlações magnéticas. Portanto, nossos resultados sustentam uma frustração magnética significante, introduzindo uma nova temperatura característica T* e sugerindo um comportamento interessante para as correlações magnéticas na fase paramagnética neste sistema RMn2O5 (R = Eu, Bi, e Dy). No material GdAl3 as interações entre o grau de liberdade de spin e os deslocamentos atômicos foram estudadas por meio do espalhamento Raman polarizado em função da temperatura. Neste composto a camada de Gd 4 f 7é esférica, indicando que os efeitos de campo cristalino são de ordem superiores. O estudo do acoplamento spin-rede pode fornecer evidências do mecanismo de troca e o grau de correlações magnéticas neste sistema. Nossas medidas de espalhamento Raman em superfícies frescas mostraram fônons com comportamento de freqüência convencional, enquanto que superfícies crescidas naturalmente e polidas apresentam anomalias na freqüência dos fônons abaixo de uma temperatura característica T** ~ 50 K. Tais anomalias são possivelmente devido a uma modulação da energia magnética pelas vibrações da rede em uma fase paramagnética fortemente correlacionada. Um estado de spin totalmente correlacionado imediatamente acima de TN é deduzido de nossos resultados neste sistema frustrado. Também, sugerimos que o acoplamento spin-fônon em metais pode depender das condições de superfície da amostra devido a que anomalias dos fônons foram observadas só nas amostras de superfícies envelhecidas. Finalmente, para a perovskita dupla Sr2CoUO6, os modos Raman de primeira e alta ordem foram estudos em função da temperatura. Nossos dados de espalhamento Raman revelam a existência de duas temperaturas características, T1 ~ 150 K e T2 ~ 300 K, onde são observados comportamentos não convencionais das intensidades dos espectros Raman e um amolecimento anômalo na freqüência de um fônon de alta freqüência abaixo de T2. Estas anomalias sugerem a possibilidade de transições de fase estruturais e/ou eletrônicas a essas temperaturas características. Baseado nas modificações relevantes dos espectros Raman e o comportamento quase constante das posições dos modos de alta ordem com a temperatura, sugerimos uma contribuição do mecanismo Franck-Condon neste sistema / Abstract: In this thesis we present an investigation of two magnetically frustrated systems, namely the RMn2O5 series (R = Eu, Bi, Dy) and the intermetallic compound GdAl3, in addition to the double perovskite compound Sr2CoUO 6. These systems were studied mainly using the Raman spectroscopy technique and complemented with magnetic susceptibility measurements. For the system RMn2O5 (R = Bi, Eu, and Dy), we present a study of the low- and high-frequency optical phonons. All studied materials show anomalous phonon shifts below a new characteristic temperature, T*~ 60-65 K. The sign and magnitude of such shifts appear to be correlated with the ionic radius of R. For instance, the high-energy phonons evolve from softenings for R = Bi to hardenings for R = Dy, and show an intermediary behavior for R = Eu in the temperature range between TC/TN and T*. On the other hand, the low-frequency anomalous phonon behaviors show softenings for R = Bi and hardening for R = Eu and Dy in the same paramagnetic range ( TC/TN < T < T*). Additional phonon anomalies were identified below ~ TN ~ 40-43 K, re ecting the onset of long-range ferroelectric and/or magnetic order of the Mn sublattice. Complementary dc-magnetic susceptibility [x(T)] measurements for BiMn2O5 up to 800 K yield a Curie-Weiss temperature q CW = -253(3) K, revealing a fairly large frustration ratio ( q CW / TN). Deviations of the inverse magnetic suceptibility, substracting the diamagnetic term, from a Curie-Weiss paramagnetic behavior due to magnetic correlations were observed below temperatures of the order of q CW . An interesting feature is the derivative of the inverse susceptibility, which shows in ection points at ~ 160 K and ~ T*. Supported by x(T) data, the anomalous Raman phonons shifts below T* are interpreted in terms of the spin-phonon coupling, in a scenario of strong magnetic correlations. Overall, these results support significant magnetic frustration, introducing a new characteristic temperature ( T*), and suggest a surprinsingly rich behavior for the magnetic correlations in the paramagnetic phase in this system. In GdAl3, the interaction among the spin degree of freedom and the atomic displacements were investigated by means of polarized Raman scattering. In this compound the Gd 4 f 7 shell is spherical, indicating that the crystal field e ect can be neglected. The spin-lattice coupling provide a fingerprint of the exchange mechanism and degree of magnetic correlations in this system. Raman scattering in fresh broken surfaces shows phonons with conventional frequency behavior, while naturally grown and polished surfaces present frequency anomalies below a characteristic temperature T** ~ 50 K. Such anomalies are possibly due to a modulation of the magnetic energy by the lattice vibrations in a strongly spin-correlated paramagnetic phase. A fully spin-correlated state inmediately above TN is inferred from our results in this frustrated system. Also, we suggest that the spin-phonon coupling in metals may depend in the surface conditions due to phonon anomalies were observed only in old-surface samples. Finally, for the Sr2CoUO6 double perovskite, the first- and higher-order Raman modes were studied as a function of temperature. Our Raman scattering results revealed the existence of two characteristic temperatures, T1 ~ 150 K e T2 ~ 300 K, where we observed unconvencional intensity behaviors of the Raman spectra and an anomalous softening of a particular high-energy mode below T2. These anomalies suggest structural and/or electronic phase transitions at such characteristic temperatures. Based on relevant modifications of the Raman spectra and the near-constant position behavior with temperature, we suggest a contribution of the Franck-Condon mechanism in this system / Doutorado / Física da Matéria Condensada / Doutor em Ciências

Made available in DSpace on 2014-07-29T14:49:09Z (GMT). No. of bitstreams: 1 Dissertacao Andre Luiz A Alves.pdf: 1886646 bytes, checksum: a7eba1a34d6ce67e79f7d867c7ea8f59 (MD5) Previous issue date: 2010-12-07 / Judicial decisions produce direct effects on the market, by increasing or reducing the costs of economic trades, mainly in a country like Brazil, where the Judiciary is the main arena of solution of conflicts of interests. In this scenario, the Brazilians judges tend to be tolerant with relativizing the effects of laws and contracts, modifying obligation in order to generate equity and practice social justice. One of the main legal mechanisms for the judicial breaches of contracts is the Theory of Frustration. An important legal instrument, which serves to prevent distortions in contractual relations, gains a part at the expense of an excessive burden of the other, the Theory of Frustration is often invoked by producers of agricultural commodities, especially soya, to terminate or resurvey future sales contracts, one of the main mechanisms of funding the Brazilian agribusiness. Occurs that opportunistic breaches of these contracts create instability in the agricultural sector, producing additional costs for production and causing loss of competitiveness. / As decisões judiciais produzem efeitos diretos no mercado, aumentando ou diminuindo os custos das trocas econômicas, principalmente em um país como o Brasil, onde o Poder Judiciário acaba sendo a principal arena de solução dos conflitos de interesses. Neste cenário, os juízes brasileiros tendem a ser tolerantes com a relativização dos efeitos de leis e contratos, modificando obrigações pactuadas no intuito de gerarem equidade e praticarem justiça social. Um dos principais mecanismos jurídicos para as quebras judiciais de contratos é a Teoria da Imprevisão. Instrumento jurídico de relevada importância, que serve para impedir distorções nas relações contratuais, com ganhos de uma parte à custa de uma excessiva onerosidade da outra, a Teoria da Imprevisão é muitas vezes invocada por produtores rurais de commodities agrícolas, principalmente soja, para extinguir ou revisar os chamados contratos de venda futura, um dos principais meios de financiamento do agronegócio brasileiro. Ocorre que quebras oportunistas destes contratos geram instabilidade no setor agrícola, produzindo custos adicionais à produção e causando perda de competitividade.

Abstract This dissertation studies emotional displays in talk-in-interaction, especially focusing on conversational argument, storytelling and teasing. The aim is to understand how verbal expressions, prosodic cues, and embodied actions interact with each other in emotional expression. The main analytic approach and methodology is conversation analysis and multimodal interaction analysis, applied to interactional sequences from everyday conversations. The research data comes from three different video recordings and their transcripts. First, the dissertation reveals two broad types of frustration in conversational argument. The findings suggest that combined verbal and nonverbal expression of frustration involves a complex interplay of prosodic cues and embodied actions. Nonverbal expression of frustration is displayed by embodied actions alone. Second, the dissertation shows how shared joy is conveyed between storytellers and recipients in storytelling. They can achieve shared joy because the recipients express willing participation and active recipiency in two main ways: they display verbal appreciation of the story, or they join in the storytelling through laughter, smiles, head nods, and gaze exchanges. The recipients may also offer summaries or interpretations of events in the story by comparing their own experiences to events in the story. Third, the dissertation analyzes playful teasing activity, showing how teasing activity can bring about a shared experience of amusement for both teasers and their “targets.” The study argues that recipients of teasing are active contributors in the social interaction. The transient embarrassment felt by the teased participants does not prevent the exchange from reaching a shared experience of amusement. / Tiivistelmä Väitöskirja tutkii tunteiden osoittamista arkisissa keskustelutilanteissa ja erityisesti väittelyn, tarinankerronnan ja kiusoittelun kuluessa. Tutkimusmetodi on pääasiassa keskustelunanalyysi, jonka avulla tutkitaan, miten kielelliset ilmaukset, prosodiset vihjeet sekä keholliset toiminnot yhdessä tuottavat tunneilmauksia. Tutkimusaineiston muodostaa kolme videoitua keskustelua ja niiden litteraatiot. Tutkimus osoittaa arkikeskusteluissa esiintyvissä väittelyissä ilmenevän kahtalaista turhautumisen tyyppiä. Ensimmäisessä puhujat tuottavat rinnan kielellisiä ja ei-kielellisiä turhautumisen ilmauksia, toisessa turhautumista osoitetaan vain ei-kielellisin keinoin. Tuloksien mukaan edellisessä tyypissä prosodia ja keholliset toiminnot ovat monimutkaisessa vuorovaikutuksessa keskenään. Jälkimmäisessä tyypissä turhautumista ilmaistaan pelkästään keholla. Toiseksi väitöskirja osoittaa, miten jaettu ilon tunne syntyy puhujien ja vastaanottajien välisenä toimintana. Tarinankerronnassa saavutetaan ilon hetkiä, koska vastaanottajat ovat halukkaasti mukana kerronnassa ja osoittavat aktiivista vastaanottoa kahdella tavalla: he osoittavat arvostusta kertomusta kohtaan verbaalisin keinoin, tai he liittyvät kerrontaan mukaan nauramalla, hymyilemällä, nyökkäilemällä, vaihtamalla katseita keskenään, referoimalla ja tulkitsemalla kertojan aiempaa puhetta formulaatioillaan ja vertailemalla omia kokemuksiaan tarinan tilanteeseen. Kolmanneksi tutkimus analysoi leikkisää kiusoittelua, joka saadaan aikaan liioittelevilla kielellisillä ilmauksilla sekä liioittelevilla prosodisilla vihjeillä ja eleillä. Tutkimus näyttää, että kiusoittelun kohteet aktiivisesti myötävaikuttavat kiusoittelutoimintaan. He voivat olla siinä mukana liioittelevilla vastausvuoroilla, nauramalla tai toimimalla mukana pelkästään eleiden avulla. Empiirinen analyysi näyttää, että kiusoittelutoiminta tuottaa yhteisen huvittuneisuuden kokemuksen keskustelun kuluessa. Kiusoittelijan ja kiusoittelun kohteen kokema ohimenevä nolous tai kiusaantuneisuus ei estä tämän yhteisen huvittuneisuuden kokemuksen saavuttamista.

Nous nous sommes intéressés à la description de la dynamique d'un liquide surfondu en étudiant un modèle qui repose sur un ingrédient simple. En partant d'un système de Lennard-Jones monodisperse dans le plan euclidien, nous avons ajouté de la frustration en courbant le plan de sorte à former une sphère de rayon arbitraire. A l'aide d'un algorithme de dynamique moléculaire sphérique, nous avons montré que ce système présentait bien une dynamique vitreuse d'équilibre, caractérisée par la fonction de diffusion intermédiaire incohérente $F_s(k,t)$, qui ralentit fortement et change de comportement à basse température, pour une faible variation de la statique. Le système se comporte comme un verre fort pour les courbures les plus grandes, mais sa fragilité augmente lorsque la courbure diminue. L'allure de $F_s(k,t)$ est également modifiée quand la courbure diminue, ce que nous avons essayé d'expliquer par l'étude de la théorie de couplages de modes (MCT) sur la sphère. Nous avons dérivé l'équation dynamique de MCT sphérique puis étudié la limite aux temps longs de sa solution. On obtient une transition dynamique qui est similaire à celle de la MCT euclidienne, ce qui ne permet pas d'expliquer l'effet de courbure sur $F_s(k,t)$, bien que celle-ci ait une influence sur la valeur de la température de transition. Enfin, nous nous sommes intéressés au rôle des "défauts", dont un nombre minimal de $12$ est imposé par la topologie. A basse température, les défauts tendent à se réunir en structures linéaires, ce qui est prévu théoriquement et observé dans certaines expériences. Les défauts ont une contribution importante à la relaxation, sans pour autant que l'influence des autres particules ne soit négligeable. / We are interested in the description of the dynamics of a supercooled liquid through the study of a model which relies on a simple geometrical ingredient. Starting from a monodisperse Lennard-Jones system on the euclidean plane, we add frustration by curving the space to form a sphere of arbitrary radius. Using a molecular dynamics algorithm, we showed that this system indeed behaves like a glassy liquid at equilibrium. The dynamics, caracterized by the self-intermediate scattering function $F_s(k,t)$, slows down strongly and changes shape at low temperature, for a small variation of the statics. The system behaves like a strong glass for high curvatures, but its fragility increases when the curvature decreases. The shape of $F_s(k,t)$ is also modified when the curvature decreases, which we tried to explain theoretically through the study of the mode coupling theory (MCT) on the sphere. We derived the dynamical equation of spherical MCT and studied the long time limit of its solution. We predict a dynamic transition similar to the one predicted by euclidean MCT, which does not allow us to explain the effect of curvature on $F_s(k,t)$, though the curvature has an influence on the value of the transition temperature. Finally, we studied the role of "defects", among which a minimal number of $12$ is imposed by topology. At low temperature, the defects tend to form linear structures, as predicted theoretically and observed in some experiments. The defects have a strong contribution in the relaxation; however, the role of other particles is not negligible.

In this dissertation we reported our experimental investigation of the magnetic properties of nine low-dimensional vanadium compounds. Two of these materials are completely new (Pb2V5O12 and Pb2VO(PO4)2) and were found during our search for new low-dimensional vanadium oxides. Among the other seven vanadium compounds studied, three were physically investigated for the first time (Sr2VO(PO4)2, BaZnVO(PO4)2 and SrZnVO(PO4)2). Two had hitherto only preliminary, and wrongly interpreted, susceptibility measurements reported in the literature (Sr2V3O9 and Ba2V3O9) while the remaining two (Li2VOSiO4 and Li2VOGeO4) were previously investigated in some detail but the interpretation of the data was controversial. We investigated the magnetic properties of these materials by means of magnetic susceptibility and specific heat (Cp(T)) measurements (as well as single crystal ESR measurements in the case of Sr2V3O9). We synthesized the samples necessary for our physical studies. That required a search of the optimal synthesis conditions for obtaining pure, high quality, polycrystalline samples. Single crystals of Sr2V3O9 and Pb2VO(PO4)2 were also successfully grown. Pb2VO(PO4)2, BaZnVO(PO4)2, SrZnVO(PO4)2, Li2VOSiO4 and Li2VOGeO4 were found to be experimental examples of frustrated square-lattice systems which are described by the J1-J2 model. We found that Li2VOSiO4 and Li2VOGeO4 posses a weakly frustrated antiferromagnetic square lattice while Pb2VO(PO4)2, BaZnVO(PO4)2 and SrZnVO(PO4)2 form a more strongly frustrated ferromagnetic square lattice. Pb2V5O12 is structurally and compositionally related to the two dimensional A2+V4+nO2n+1 vanadates. Its structure consists of layers formed by edge- and corner-shared square VO5 pyramids. The basic structural units are plaquettes consisting of six corner-shared pyramids pointing in the same direction, which form a spin lattice of novel geometry. / In dieser Dissertation berichteten wir über unsere experimentelle Untersuchung der magnetischen Eigenschaften von neun Niedrigdimensionalen vanadiumverbindungen. Zwei dieser Materialien sind vollständig neu (Pb2VO12 und Pb2VO(PO4)2) und wurden während unserer Suche nach neuen Niedrigdimensionalen Vanadiumoxiden gefunden. Unter den anderen sieben studierten Vanadiumverbindungen, wurden drei physikalisch zum ersten Mal nachgeforscht (Sr2VO(PO4)2, BaZnVO(PO4)2 und SrZnVO(PO4)2). Zwei hatten bisher nur einleitendes, und falsch gedeutet, magnetische Susceptibilitaet Messungen, die in der Literatur berichtet wurden (Sr2V3O9 und Ba2V3O9) während die restlichen zwei (Li2VOSiO4 und Li2VOGeO4) vorher in irgendeinem Detail aber in der Deutung der Daten waren umstritten nachgeforscht wurden. Wir forschten die magnetischen Eigenschaften dieser Materialien mittels der magnetischen Susceptibilitaet und der spezifischen Waerme (Cp(T)) nach (sowie ESR-Messungen des einzelnen Kristalles im Fall von Sr2V3O9). Wir synthetisierten die Proben, die für unsere körperlichen Studien notwendig sind. Das erforderte eine Suche der optimalen Synthesezustände für das Erreichen der reinen, hohen Qualität, polykristalline Proben. Einzelne Kristalle von Sr2V3O9 und von Pb2VO(PO4)2 wurden auch erfolgreich gewachsen. Pb2VO(PO4)2, BaZnVO(PO4)2, SrZnVO(PO4)2, Li2VOSiO4 und Li2VOGeO4 werden gefunden, um experimentelle Beispiele der frustrierten Quadrat-Gittersysteme zu sein, die durch das J1-j2 model. Wir fanden daß posses Li2VOSiO4 und Li2VOGeO4 ein schwach frustriertes antiferromagnetische quadratisches Gitter, während Pb2VO(PO4)2, BaZnVO(PO4)2 und SrZnVO(PO4)2 ein stärker frustriertes ferromagnetisches quadratisches Gitter bilden. Pb2V5O12 strukturell und zusammenhängt kreativ mit den zweidimensionalen vanadates A2+V4+nO2n+1 beschrieben werden. Seine Struktur besteht aus den Schichten, die durch Rand und Ecke-geteilte quadratische Pyramiden VO5 gebildet werden. Die grundlegenden strukturellen Maßeinheiten sind die plaquettes, die aus sechs Ecke-geteilten Pyramiden bestehen, die in die gleiche Richtung zeigen, die ein Drehbeschleunigunggitter von Romangeometrie bilden.

Solicitud de embargo por publicación en revista indexada. / El propósito del presente estudio fue adaptar y validar la Escala de Tolerancia a la Frustración (Oliva et al., 2011) para su uso en población adolescente peruana. El muestreo fue intencional y se evaluó a 436 adolescentes quechuahablantes de Cusco y Apurímac, entre los 12 y 17 años de edad de ambos sexos. Se analizó la estructura factorial de la escala y su confiabilidad. Para esto, se aplicó el Análisis Factorial Exploratorio (AFE) y el Análisis Factorial Confirmatorio (AFC), donde se dividió la muestra estadística de manera aleatoria en 206 y 230 participantes respectivamente. Los resultados evidencian que el AFE revela la unidimensionalidad de la escala con autovalores mayores a los generados por el azar y que explica el 44.5% de la varianza total. Asimismo, las cargas factoriales fueron mayores a 0.40 y el AFC corroboró esta estructura. El modelo evidenció satisfactorios y mejores índices de ajuste (CFI = 1.000; RMSEA = .000; SRMR = .049). El coeficiente de consistencia interna fue adecuado (ω = .67). Se concluye que, la traducción al quechua de la escala cuenta con evidencias preliminares para ser considerada una medida precisa, válida e invariante para evaluar la tolerancia a la frustración en adolescentes quechuahablantes peruanos. / The purpose of the present study was to adapt and validate the Frustration Tolerance Scale (Oliva et al., 2011) for its use in the Peruvian adolescent population. The sampling was intentional and 436 Quechua-speaking adolescents from Cusco and Apurímac, between 12 and 17 years of age of both sexes, were evaluated. The factorial structure of the scale and its reliability were analyzed. For this, the Exploratory Factor Analysis (EFA) and the Confirmatory Factor Analysis (CFA) were applied, where the statistical sample was randomly divided into 206 and 230 participants respectively. The results show that the EFA reveals the unidimensionality of the scale with eigenvalues ​​greater than those generated by chance and that it explains 44.5% of the total variance. Likewise, factor loadings were greater than 0.40 and the AFC corroborated this structure. The model showed satisfactory and better fit indices (CFI = 1,000; RMSEA = .000; SRMR = .049). The internal consistency coefficient was adequate (ω = .67). It is concluded that the Quechua translation of the scale has preliminary evidence to be considered a precise, valid and invariant measure to evaluate tolerance to frustration in Quechua-speaking Peruvian adolescents. / Tesis

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第20088号 / 工博第4255号 / 新制||工||1659(附属図書館) / 33204 / 京都大学大学院工学研究科材料工学専攻 / (主査)教授 中村 裕之, 教授 酒井 明, 教授 吉村 一良 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

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