• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 3
  • 1
  • 1
  • Tagged with
  • 5
  • 5
  • 3
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Formação de classes funcionais de estímulos musicais

Machado, Alex Roberto 17 March 2008 (has links)
Made available in DSpace on 2016-12-23T14:38:01Z (GMT). No. of bitstreams: 1 Dissertacao Alex Roberto Machado.pdf: 1288474 bytes, checksum: bfa93076c814a3f49c9b0c06fd320634 (MD5) Previous issue date: 2008-03-17 / Uma abordagem comportamental da música considera a ação musical como comportamento e a música como estímulo, produto dessa ação. O objetivo geral aqui proposto foi o de verificar o efeito do treino discriminativo sobre a formação de classes funcionais de melodias em andamentos e modos diferentes. Participantes: 9 estudantes do segundo período da Graduação em Psicologia da Unilinhares (Linhares ES), divididos em três grupos. Cada grupo foi submetido a uma das condições experimentais (modo, andamento ou mista). Para a coleta de dados foi utilizado um software, produzido especialmente para este estudo - SomPsi - que executou todo o treinamento dos participantes e gerou relatórios com informações sobre o desempenho dos mesmos, fase a fase. Fase1: linha de base, apresentados 6 estímulos sonoros por 2 vezes; Fase 2, treinou-se a relação AB; Fase 3, a relação BC (nestas duas fases foram apresentados 4 estímulos 5 vezes cada); Fase 4: teste da formação de classes funcionais de estímulos musicais, organizada de forma similar à Fase 1. Os dados demonstram que os objetivos da pesquisa foram alcançados, pois o treino proposto mostrou-se eficiente para a formação das classes funcionais de estímulos musicais. Houve diferenças nos desempenhos dos participantes nas condições experimentais, corroborando os achados em pesquisas levantadas na revisão do tema, a saber: agrupamentos de estímulos pela propriedade andamento foram mais fáceis de discriminar do que aqueles agrupados pela melodia. Além disso, a manipulação combinada das duas propriedades, em condição convergente, permitiu desempenho ainda superior dos participantes, como demonstrado na condição Mista . / A behavioral approach of music considers the musical action as behavior and the music as stimuli, this action s product. The general objective here proposed was to verify the discriminative training s effect above mode and tempo different melodies functional classes formation. Participants: 9 of Unilinhares students (Linhares ES) second period psychology s graduation, divided in three groups. Each group was submitted in one of the experimental conditions (mode, tempo or mix). For data collect was utilized a software, especially designed for this study - SomPsi which executed all the participants training and generated reports with informations about their performance, fase by fase. Fase 1: baseline, presented 6 sound stimuli twice; Fase 2, relation AB trained; Fase 3, the BC relation (in this two fases were presented 4 stimuli, 5 times each); Fase 4: functional classes formation test, organized similarly to Fase 1. Data showed that this research s objectives were reached, because the training was efficient to musical stimuli s functional classes formation. There were differences between participants performance in the experimental conditions, corroborating with researches findings, as found in theme s revision, just like: stimuli grouping by tempo property were easier to discriminate than those grouped by the mode. Thus, combined manipulation of the two properties, in convergent condition, allowed even better participants performance, like showed in Mix condition.
2

Efeitos de comportamento verbal metafórico sobre respostas verbais subsequentes / Effects of metaphorical verbal behavior upon subsequent verbal responses

Rolim, Sidinei Fernando Ferreira 13 April 2015 (has links)
A presente dissertação apresenta um estudo experimental do comportamento verbal metafórico, verificando os efeitos deste fenômeno sobre respostas verbais subsequentes de vinte e cinco participantes universitários de uma universidade pública do Estado de São Paulo. Por meio de situações problemas, foi proposta uma investigação do controle de estímulos presente em tatos metafóricos (fera e vírus) como antecedentes verbais descritos pelo experimentador. Houve distintas condições experimentais para cada tato metafórico que exigiu a emissão de respostas verbais subsequentes de cada participante, após a leitura de um texto informativo. As respostas verbais subsequentes envolveram indicar entre alternativas a melhor para a resolução de problemas fictícios entre medidas preventivas e corretivas e informar a uma pessoa desconhecida sobre o texto informativo lido. O experimento foi arranjado, sob a hipótese de que os participantes tenderiam para medidas preventivas, se lessem o texto informativo com o tato metafórico da violência comparada a um vírus, ou para medidas corretivas, se lessem o texto informativo com o tato metafórico da violência comparada a uma fera. Os participantes, individualmente, foram convidados a realizar o mesmo protocolo de tarefas solicitadas na Linha de Base e na Condição Experimental. Este protocolo envolveu quatro tarefas, a saber (1) leitura de um texto informativo (2) escolha de alternativa preventiva ou corretiva para solução de problemas sociais, como fome na Linha de Base e violência na Condição Experimental, (3) indicação de trecho de controle para realização da tarefa anterior e (4) emissão de comportamento intraverbal, ou seja, contar sobre o texto informativo lido na primeira tarefa para uma pessoa desconhecida, que veria virtualmente. Na Condição Experimental, os participantes de cada grupo tiveram contato com informação apresentada por meio de metáforas distintas (grupo G-I e grupo G-II), sem metáfora (grupo G-III) e com estímulos arbitrários (palavra sem sentidos) comparados a metáforas distintas (grupo G-IV e grupo GV). Em todas as condições experimentais, houve avaliação do comportamento do participante como falante e ouvinte de seu próprio comportamento verbal. O experimento trouxe dados instigantes entre os grupos experimentais, visto que os participantes do grupo (a) G-I replicaram os dados de estudos anteriores em apenas 20% das respostas dos participantes, (b) G-II mantiveram controle verbal em 80% das respostas verbais subsequentes, ao assinalarem por medidas preventivas diante da metáfora vírus, (c) G-III mostrou uma prevalência dos participantes por medidas preventivas, visto que todos responderam por esta alternativa, (d) G-IV replicaram os dados de pesquisas anteriores mantendo uma relação entre o tato metafórico fera para 60% respostas verbais subsequentes com medidas corretivas, enquanto que (e) G-V estabeleceram o controle verbal metafórico sobre 100% das respostas verbais subsequentes com medidas preventivas. Na discussão de dados, são tecidas considerações acerca do desempenho dos participantes por grupo ressaltando (1) história de vida e história experimental, (2) contextos atuais e culturais presentes na vida dos participantes, (3) estabelecimento do controle de estímulos pelo tato metafórico, (4) comparativos entre os grupos, entre outras variáveis relevantes. Os achados do presente estudo são curiosos para a temática e mostra a pertinência de novos estudos no campo experimental para a temática / This work presents an experimental study of the metaphorical verbal behavior by checking the effects of this phenomenon on subsequent verbal responses. Twenty-five college student from a public university in the state of São Paulo were participants. Through problem situations, it was proposed an investigation of the stimulus control of metaphorical tact (\"beast\" and \"virus\") as verbal history described by the experimenter. There were different experimental conditions for each metaphorical tact which required a subsequent verbal responses of each participant, after reading an informational text. Subsequent verbal responses were: the participants indicated among the best alternatives for resolving problems between fictitious preventive and corrective measures and the participants reported to an unknown person about the text that the participants read. The experiment had the hypothesis that participants tend to give preventive measures, when read the text with the metaphorical tact of \"violence\" compared to a \"virus\" or corrective measures, if they read the information text with tact metaphorical of \"violence\" compared to a \"beast\". The individual participants were asked to perform the same protocol tasks requested in the Baseline and Experimental Condition. This protocol had four tasks, namely (1) reading informational text (2) choosing between preventive or corrective alternative to solve social problems such as hunger in the Baseline and violence in Experimental Condition, (3) showing control on the responses of previous tasks and (4) intraverbal behavior, that is, telling about the informational text read in the first task for an unknown person, which showed up virtually. In the Experimental Condition, participants in each group had contact with informational text presented through different metaphors (G-I and G-II groups), without metaphor (G-III group) and arbitrary stimuli (words without meanings) compared to different metaphors (G-IV and GV groups). In all experimental conditions, there was participant\'s performance evaluation as speaker and listener of his own verbal behavior. The experiment brought compelling data between the experimental groups, as members of the group (a) G-I replicated data from previous studies in only 20% of participants\' responses, (b) G-II remained verbal control in 80% of verbal responses subsequent, by pointing by preventive options before the \"virus\" metaphor (c) G-III showed a prevalence of participants with preventive options, since all accounted for this alternative, (d) G-IV confirmed the previous survey data keeping a relationship between the \"beast\" metaphorical tact and 60% subsequent verbal responses with corrective options, while (e) G-V established the metaphorical verbal control over 100% of subsequent verbal responses with preventive measures. In the data discussion, it was emphasize (1) life history and experimental history, (2) current and cultural contexts present in the lives of the participants, (3) stimulus control of metaphorical tact, (4) comparison between groups, and other relevant variables. The findings of present study are curious and inspires more studies in the experimental field of the theme
3

Influence de la précharge sur tenue statique et fatigue des assemblages boulonnés / Influence de la précharge sur la tenue statique et fatigue des assemblages boulonnés

Benhaddou, Taha 30 September 2015 (has links)
La maîtrise de la pré-tension revêt d’une grande importance pour garantir la tenue mécanique des assemblages boulonnés, et ce quel que soit le mode de sollicitations auquel ils sont soumis. En particulier, pour les chargements transverses et sous sollicitations de fatigue, un niveau de pré-tension insuffisant ne permet pas d’exploiter la capacité de transfert d’effort des interfaces entre pièces assemblées. Un niveau de pré-tension très important n’est pas souhaitable non plus, car cela génère des phénomènes de fatigue de contact ou de matage excessif sous tête qui ont un effet néfaste sur la durée de vie des assemblages et des structures aéronautiques. Le serrage contrôlé des fixations permet ainsi de produire et de maintenir un équilibre entre les modes de transfert d’effort, permettant ainsi d’exploiter pleinement leur potentiel et obtenir une tenue optimale de l’assemblage. L’objectif de ce travail est d’apporter une contribution à la compréhension et à l’exploitation des assemblages boulonnés à serrage contrôlé. Une approche hybride a été adoptée afin de démontrer l’effet bénéfique d’une pré-tension contrôlée. La modélisation numérique a permis de comprendre les mécanismes de transfert d’effort et de prédire la tenue mécanique des assemblages aéronautiques de façon satisfaisante. La démarche expérimentale a été exclusivement basée sur des techniques dites de serrages alternatifs. L’objectif est d’avoir une faible incertitude sur la valeur de la précontrainte installée, permettant d’évaluer la performance mécanique des assemblages boulonnés. La tenue en fatigue des assemblages boulonnés, travaillant en matage-cisaillement, est largement améliorée grâce à l’application d’une précontrainte précise. La maîtrise des paramètres intrinsèques au maintien de la force axiale de serrage tel que la nature de l’interface entre pièces assemblées, la rigidité des fixations et la nature de l’ajustement, permet également d’esquisser un potentiel d’optimisation non négligeable des assemblages boulonnés. / Axial preload is a fundamental parameter that needs to be correctly mastered in order to ensure the mechanical strength of bolted joints. In the case of bolted shear joints under fatigue solicitations, a low preload does not allow to exploit the load carrying capacity of the friction interfaces. A high preload is undesirable as it can generate fretting fatigue phenomena or excessive under head contact pressure that may lead to decrease fatigue lives of aeronautical joints and structures. Controlled preload application generates and maintains equilibrium of load transfer mechanisms, inducing a full use of their potential and leading to an optimal fatigue life of the joint. This study focuses on aeronautical preloaded joints with the objective of understanding the effects of controlled preload over the mechanics of shear joints and exploiting the contribution of preload to enhance their fatigue lives. For this purpose, a hybrid approach has been adopted to demonstrate the beneficial effect of controlled preload. Numerical modelling has been carried out to better understand the preload influence but also to predict the mechanical strength of bolted joints. The experimental database has been generated using exclusively alternative tightening techniques, in order to reduce the scatter on final preload and therefore evaluate the effect of controlled preload in a more accurate way. The fatigue strength of bolted shear joints has been significantly improved for most of tested configurations due to the application of accurate axial preload. The effects of many other parameters, as the nature of interface, the stiffness of fasteners or the radial adjustment has also been assessed and permits to identify an additional potential optimization of bolted joints.
4

Efeitos de comportamento verbal metafórico sobre respostas verbais subsequentes / Effects of metaphorical verbal behavior upon subsequent verbal responses

Sidinei Fernando Ferreira Rolim 13 April 2015 (has links)
A presente dissertação apresenta um estudo experimental do comportamento verbal metafórico, verificando os efeitos deste fenômeno sobre respostas verbais subsequentes de vinte e cinco participantes universitários de uma universidade pública do Estado de São Paulo. Por meio de situações problemas, foi proposta uma investigação do controle de estímulos presente em tatos metafóricos (fera e vírus) como antecedentes verbais descritos pelo experimentador. Houve distintas condições experimentais para cada tato metafórico que exigiu a emissão de respostas verbais subsequentes de cada participante, após a leitura de um texto informativo. As respostas verbais subsequentes envolveram indicar entre alternativas a melhor para a resolução de problemas fictícios entre medidas preventivas e corretivas e informar a uma pessoa desconhecida sobre o texto informativo lido. O experimento foi arranjado, sob a hipótese de que os participantes tenderiam para medidas preventivas, se lessem o texto informativo com o tato metafórico da violência comparada a um vírus, ou para medidas corretivas, se lessem o texto informativo com o tato metafórico da violência comparada a uma fera. Os participantes, individualmente, foram convidados a realizar o mesmo protocolo de tarefas solicitadas na Linha de Base e na Condição Experimental. Este protocolo envolveu quatro tarefas, a saber (1) leitura de um texto informativo (2) escolha de alternativa preventiva ou corretiva para solução de problemas sociais, como fome na Linha de Base e violência na Condição Experimental, (3) indicação de trecho de controle para realização da tarefa anterior e (4) emissão de comportamento intraverbal, ou seja, contar sobre o texto informativo lido na primeira tarefa para uma pessoa desconhecida, que veria virtualmente. Na Condição Experimental, os participantes de cada grupo tiveram contato com informação apresentada por meio de metáforas distintas (grupo G-I e grupo G-II), sem metáfora (grupo G-III) e com estímulos arbitrários (palavra sem sentidos) comparados a metáforas distintas (grupo G-IV e grupo GV). Em todas as condições experimentais, houve avaliação do comportamento do participante como falante e ouvinte de seu próprio comportamento verbal. O experimento trouxe dados instigantes entre os grupos experimentais, visto que os participantes do grupo (a) G-I replicaram os dados de estudos anteriores em apenas 20% das respostas dos participantes, (b) G-II mantiveram controle verbal em 80% das respostas verbais subsequentes, ao assinalarem por medidas preventivas diante da metáfora vírus, (c) G-III mostrou uma prevalência dos participantes por medidas preventivas, visto que todos responderam por esta alternativa, (d) G-IV replicaram os dados de pesquisas anteriores mantendo uma relação entre o tato metafórico fera para 60% respostas verbais subsequentes com medidas corretivas, enquanto que (e) G-V estabeleceram o controle verbal metafórico sobre 100% das respostas verbais subsequentes com medidas preventivas. Na discussão de dados, são tecidas considerações acerca do desempenho dos participantes por grupo ressaltando (1) história de vida e história experimental, (2) contextos atuais e culturais presentes na vida dos participantes, (3) estabelecimento do controle de estímulos pelo tato metafórico, (4) comparativos entre os grupos, entre outras variáveis relevantes. Os achados do presente estudo são curiosos para a temática e mostra a pertinência de novos estudos no campo experimental para a temática / This work presents an experimental study of the metaphorical verbal behavior by checking the effects of this phenomenon on subsequent verbal responses. Twenty-five college student from a public university in the state of São Paulo were participants. Through problem situations, it was proposed an investigation of the stimulus control of metaphorical tact (\"beast\" and \"virus\") as verbal history described by the experimenter. There were different experimental conditions for each metaphorical tact which required a subsequent verbal responses of each participant, after reading an informational text. Subsequent verbal responses were: the participants indicated among the best alternatives for resolving problems between fictitious preventive and corrective measures and the participants reported to an unknown person about the text that the participants read. The experiment had the hypothesis that participants tend to give preventive measures, when read the text with the metaphorical tact of \"violence\" compared to a \"virus\" or corrective measures, if they read the information text with tact metaphorical of \"violence\" compared to a \"beast\". The individual participants were asked to perform the same protocol tasks requested in the Baseline and Experimental Condition. This protocol had four tasks, namely (1) reading informational text (2) choosing between preventive or corrective alternative to solve social problems such as hunger in the Baseline and violence in Experimental Condition, (3) showing control on the responses of previous tasks and (4) intraverbal behavior, that is, telling about the informational text read in the first task for an unknown person, which showed up virtually. In the Experimental Condition, participants in each group had contact with informational text presented through different metaphors (G-I and G-II groups), without metaphor (G-III group) and arbitrary stimuli (words without meanings) compared to different metaphors (G-IV and GV groups). In all experimental conditions, there was participant\'s performance evaluation as speaker and listener of his own verbal behavior. The experiment brought compelling data between the experimental groups, as members of the group (a) G-I replicated data from previous studies in only 20% of participants\' responses, (b) G-II remained verbal control in 80% of verbal responses subsequent, by pointing by preventive options before the \"virus\" metaphor (c) G-III showed a prevalence of participants with preventive options, since all accounted for this alternative, (d) G-IV confirmed the previous survey data keeping a relationship between the \"beast\" metaphorical tact and 60% subsequent verbal responses with corrective options, while (e) G-V established the metaphorical verbal control over 100% of subsequent verbal responses with preventive measures. In the data discussion, it was emphasize (1) life history and experimental history, (2) current and cultural contexts present in the lives of the participants, (3) stimulus control of metaphorical tact, (4) comparison between groups, and other relevant variables. The findings of present study are curious and inspires more studies in the experimental field of the theme
5

Prediction Of The Mechanical Behaviour Of A Closed Cell Aluminium Foam Using Advanced Nonlinear Finite Element Modelling

Mahesh, C 07 1900 (has links) (PDF)
Cellular materials like aluminum foam which is the subject of interest here are generally characterized by high energy absorption capacity per unit weight. Materials of this category can be ideal for applications such as packaging and vehicle body structures for enhanced impact safety. A particularly well-known variety of closed-cell aluminum foam is designated as Alporas, which is studied here. From a viewpoint of mechanical behavior, the foam being considered can be represented using either a detailed cellular approach capturing the voids present in foam structure or a phenomenological approach in which experimental stress-strain response is assigned a-priori to solid elements filling up the space occupied by a foam geometry. Both modeling approaches are studied in the present work. It has been shown for the first time that stress-strain behavior under compression including densification can be predicted well with a Kelvin cell-based model, although scope for further improvement exists. Based on a novel combination of compression tests at low strain rates in a UTM and medium strain rates in low velocity impact tests, a relation between foam strength and strain rate has been proposed. This effect of strain rate on strength is captured in a finite element model for analysis using an explicit code with contact simulation capabilities and the predictions for projectile impact tests at higher strain rates using a gas gun-based device have been found to match commendably with results obtained from the said tests.

Page generated in 0.1188 seconds