[pt] O presente trabalho tem como objetivo central discutir as diversas modalidades de escuta e comunicação presentes na clínica psicanalítica atual. Amparados nos conceitos de Thomas Ogden de terceiro-analítico intersubjetivo e posição autista-contígua, buscaremos apresentar as transformações da técnica psicanalítica ao longo dos anos e o consequente surgimento da relevância do campo analítico como dimensão essencial da relação entre analista e analisando, principalmente no que se refere a pacientes severamente traumatizados. A partir das contribuições de Melanie Klein, Donald Winnicott e Wilfred Bion, veremos a inauguração de um modelo de constituição psíquica pautada pela intersubjetividade e nas experiências primitivas reguladas pela linguagem não verbal. / [en] This work is mainly aimed to discuss the various listening modes and communication present in the current psychoanalytical clinic. Supported in the Thomas Ogden s concepts of intersubjective analytic third and autistic-contiguous position, we will seek to present the transformations of psychoanalytic technique over the years and the consequent emergence of the relevance of analytical field as an essential dimension of the relationship between analyst and analysand, especially as regards the severely traumatized patients. From the contributions of Melanie Klein, Donald Winnicott and Wilfred Bion, we will see the inauguration of a psychic constitution model guided by the intersubjective and in primitive experience regulated by the non-verbal language.

Realistic assessments of liver injury risk for the entire occupant population require incorporating inter-subject variations into numerical human models. The main objective of this study was to quantify the variations in shape and material properties of the human liver. Statistical shape analysis was applied to analyze the geometrical variation using a surface set of 15 adult human livers recorded in an occupant posture. Principal component analysis was then utilized to obtain the modes of variation, the mean model, and a set of 95% statistical boundary shape models. Specimen-specific finite element (FE) models were employed to quantify material and failure properties of human liver parenchyma. The mean material model parameters were then determined, and a stochastic optimization approach was utilized to determine the standard deviations of the material model parameters. The distributions of the material parameters were used to develop probabilistic FE models of the liver implemented in THUMS human FE model to simulate oblique impact tests under three impact speeds. In addition, the influence of organ preservation on the biomechanical responses of animal livers was investigated using indentation and tensile tests. Results showed that the first five modes of the human liver shape models accounted for more than 70% of the overall anatomical variations. The Ogden material model with two parameters showed a good fit to experimental tensile data before failure. Significant changes of the biomechanical responses of liver parenchyma were found after cooling or freezing storage. The force-deflection responses of THUMS model with probabilistic liver material models were within the test corridors obtained from cadaveric tests. Significant differences were observed in the maximum and minimum principal Green-Lagrangian strain values recorded in the THUMS liver model with the default and updated average material properties. The results from this study could help in the development of more biofidelic human models, which may provide a better understanding of injury mechanisms of the liver during automobile collisions. / Ph. D.

Attitudes are usually defined as feelings for or against something (Remmers and Gage, 1955). They are very important in the lives of people because they help determine future success in an individual's life. Because of them one works to get the things he wants, one votes for or against certain issues, one joins a cause, opposes something, or attempts to influence others.

This work presents a fracture mechanics analysis of the cathodic delamination problem for the polyurethane/titanium and polyurea/steel interfaces. The nonlinear behavior of both polymers was investigated. The recent Marlow model was used to define the strain energy function of the polymers. Viscoelastic effects of the polyurea were also studied. The Marlow model was associated with a nine-term Prony series. This model was seen to represent experimental data relatively well for a wide range of strain rates both in tension and compression. The driving force for delamination, the strain energy release rate G, is presented for both interfaces. Cathodic delamination data for several temperatures are presented as crack growth rate as a function of crack driving force. The approach recognizes that both temperature and stress can be used as accelerated life testing parameters. / text

In an attempt to improve the quality in finite element analysis of thermoformed components, a method for predicting the thickness distribution is presented. The strain induced anisotropic material behaviour in the amorphous polymers of concern is also taken into account in the method. The method comprises of obtaining raw material data from experiments, followed by a simulation of the vacuum thermoforming process where hyperelastic material behaviour is assumed. The theory of hyperelasticity that was applied was based on the Ogden model and implemented in the FE-software LS-DYNA. Material behaviour from thermoformed prototypes is examined by experiments and implemented together with the mapped results from the thermoforming simulation in a succeeding FE-model. For the latter, the three-parameter Barlat model was suggested, giving the possibility to account for anisotropic material behaviour based on an initial plastic strain.

In vielen industriellen Anwendungen sind Dichtungen im Einsatz. Vergleicht man den Preis mit dem eines Gesamtsystems, in denen Dichtungen verwendet werden, so sind Dichtungen verhältnismäßig günstig. Jedoch führt ein Versagen von Dichtungen meist zu schwerwiegenden Konsequenzen. Dichtungen sind komplexe Subsysteme und ihre Auslegung erfordert umfangreiche Kenntnisse im Bereich Materialmodellierung, Belastung und Versagenskriterien. Die heutige Simulationstechnologie ermöglicht einen parametrischen Workflow für die Berechnung des Verhaltens von Dichtungen mit den auftretenden Effekten wie nichtlinearem Materialverhalten, wechselnden Kontaktbedingungen und Flüssigkeitsunterwanderung bei Druck. Als ein führendes Simulationswerkzeug für diese physikalische Fragestellung wird ANSYS Mechanical für die Auslegung herangezogen. Desweiteren kann das Verständnis für das Produkt erhöht werden, was zu einer Verbesserung der Funktionalität und der Zuverlässigkeit führt. Versuchsdaten können als Spannungs-Dehnungskurven in ANSYS importiert werden, welche das Materialverhalten des hyperelastischen Werkstoffs mit traditionellen Materialmodellen wie Mooney Rivlin, Ogden and Yeoh oder einer neueren Formulierung, der Antwortfunktionsmethode, widerspiegeln. Robuste Kontakttechnologien beschleunigen die Simulation und Entwicklungszeit-Berechnungszeiten und gewährleisten ein genaues Verhalten des Simulationsmodells. Insbesondere bei Dichtungen ist die druckbeaufschlagte Fläche in 2D und 3D Anwendungen von Bedeutung. ANSYS berechnet diese automatisch in Abhängigkeit des aktuellen Kontaktzustandes. Diese benutzerfreundliche Unterstützung führt zu einer höheren Genauigkeit des Simulationsergebnisses, da ein manuelles Schätzen der Druckflächen entfällt. Mit einem parametrischen und durchgängigen Ansatz innerhalb von ANSYS Workbench, beginnend bei der CAD-Geometrie, über die Vernetzung, Material- und Randbedingungsdefinition und Lösung. können eine Reihe von Varianten in kurzer Zeit berechnet werden. Neben einem besseren Verständnis für das Produkt hilft dies dem Ingenieur Änderungen vorzunehmen, was zu exakten und aussagekräftigen Ergebnissen führt. Desweiteren kann der Einfluss von Unsicherheiten berücksichtigt werden, sodass der Berechnungsingenieur fernab von idealen Bedingungen robuste und zuverlässige Dichtungen entwickeln kann.

The interior of heavy goods vehicles (HGVs) differs from passenger cars. Both the steering wheel and the occupant are positioned differently in a HGV and increases the risk of steering wheel rim impacts. Such impact scenarios are relatively unexplored compared to passenger car safety studies that are more prevalent within the field of injury biomechanics. The idea with using human body models (HBMs) is to complement current crash test dummies with biomechanical data. Furthermore, the biofidelity of a crash dummy for loading similar to a steering wheel rimimpact is relatively unstudied and especially to different rib levels. Therefore, the aim with this thesis was to evaluate HGV occupant thoracic response between THUMS v4.0 and Hybrid III (H3) during steering wheel rim impacts with respect to different rib levels (level 1-2, 3-4, 6-7, 7-8, 9-10) with regards to ribs, aorta, liver, and spleen. To the author’s best knowledge, use of local injury risk functions for thoracic injuries is fairly rare compared to the predominant usage of global injury criteria that mainly predicts the most commonthoracic injury risk, i.e. rib fractures. Therefore, local injury criteria using experimental test datahave been developed for the ribs and the organs. The measured parameters were chest deflectionand steering wheel to thorax contact force on a global level, whilst 1st principal Green-Lagrangestrains was assessed for the rib and the organ injury risk. The material models for the liver and the spleen were remodelled using an Ogden material model based on experimental stress-strain data to account for hyperelasticity. Rate-dependency was included by iteration of viscoelastic parameters. The contact modelling of the organs was changed from a sliding contact to a tied contact to minimize unrealistic contact separations during impact. The results support previous findings that H3 needs additional instrumentation to accurately register chest deflection for rib levels beyond its current range, namely at ribs 1-2, 7-8, and 9-10. For THUMS, the chest deflection were within reasonable values for the applied velocities, but there were no definite injury risk. Fact is, the global injury criteria might overpredict the AIS3 injury risk (rib fractures) for rib level 1-2, 7-8, and 9-10. The rib strains could not be correlated with the measured chest deflections. This was explained by the unique localized loading characterized by pure steering wheel rim impact that mainly affected the sternum and the rib cartilage while minimizing rib deformation. The organ strains indicate some risk of rupture where the spleen deforms the most at rib levels 3-4 and 6-7, and the liver and the aorta at rib levels 6-7 and 7-8. This study provides a framework for complementing H3 with THUMS for HGV occupant safety with emphasis on the importance of using local injury criteria for functional injury prediction, i.e. prediction of injury risk using parameters directly related to rib fracture or organ rupture. Local injury criteria are thus a powerful safety assessment tool as it is independent on exterior loading such as airbag, steering wheel hub, or seat belt loading. It was noticed that global injury criteria with very localized impacts such as rim impacts have not been studied and will affect rib fracture risk differently than what has been studied using airbag or seat belt restraints. However, improvements are needed to accurately predict thoracic injury risk at a material level by finding more data for the local injury risk functions. Conclusively, it is clear that Hybrid III has insufficient instrumentation and is in need of upgrades to register chest deflections at multiple rib levels. Furthermore, the following are needed: better understanding of global injury criteria specific for HGV occupant safety evaluation, more data for age-dependent (ribs) and rate-dependent (organs) injury risk functions, a tiebreak contact with tangential sliding for better organ kinematics during impacts, and improving the biofidelity of the material models using data from tissue level experiments. / Förarmiljön i lastbilar gentemot personbilar är annorlunda, i detta kontext med avseende på främst ratt- och förarposition som ökar risken för islag med rattkransen för lastbilsförare. Sådana islag är relativt outforskat jämfört med passiv säkerhet för personbilar inom skadebiomekaniken. Tanken bakom användning av humanmodeller är att komplettera nuvarande krockdockor med biomekanisk information. Dessutom är biofideliteten hos en krockdocka vid rattislag relativt okänt, speciellt vid olika revbensnivåer. Därför är målet med detta examensarbete att undersöka thoraxresponsen hos en lastbilsförare genom att använda THUMS v4.0 och Hybrid III (H3) under rattislag med avseende på revbensnivåer (nivå 1-2, 3-4, 6-7, 7-8, och 9-10) och revben, aorta, lever, och mjälte. Enligt författaren verkar användning av lokala riskfunktioner för thoraxskador relativt ostuderat jämfört med den övervägande användningen av globala riskfunktioner som huvudsakligen förutser den mest vanligt förekommande thoraxskadan, nämligen revbensfrakturer. Därför har lokala riskfunktioner skapats för revben och organ, baserat på experimentell data. Uppmätta parametrar var bröstinträngning och kontaktkraft mellan ratt och thorax på global nivå, medan första Green-Lagrange huvudtöjningen användes för att evaluera skaderisken för revben och organ. Materialmodeller för lever och mjälte ommodellerades baserat på experimentell spänning-töjningsdata med Ogdens materialmodell för att ta hänsyn till hyperelasticitet. Töjningshastighetsberoendet inkluderades genom att iterera fram viskoelastiska parametrar. Kontaktmodellering av organ gjordes genom att ändra från glidande kontakt till en låsande kontakt för att minimera orealistisk kontaktseparation under islagsfallen. Resultaten stödjer tidigare studier där H3 visat sig behöva ytterligare givare för att noggrannt kunna registrera bröstinträngning vid olika revbensnivåer bortom dess nuvarande räckvidd, nämligen vid revben 1-2, 7-8, och 9-10. Uppmätt bröstinträngning i THUMS var rimliga för hastighetsfallen men gav inte någon definitiv risk för skada. Faktum är att de globala riskfunktionerna kan överskatta AIS3 risken vid revben 1-2, 7-8, och 9-10. Revbenstöjningarna kunde inte korreleras med bröstinträngningarna. Detta kunde förklaras genom de unika lastfallen som karakteriseras av rena rattislag som främst påverkar sternum och revbensbrosk som i sin tur minimerar deformation av revben. Organtöjningarna indikerar på någon risk för ruptur där mjälten deformerar som mest vid revben 3-4 och 6-7, medan för både levern och aortan sker det vid revben 6-7 och 7-8. Denna studie presenterar ett sätt att komplettera H3 med THUMS inom passiv säkerhet för lastbilsförare med fokus på lokala riskfunktioner för funktionell skadeprediktering dvs. prediktering av skaderisken med hjälp av parametrar som är direkt relaterat till revbensfraktur eller organruptur. Lokala riskfunktioner utgör en kraftfull säkerhetsbedömning som är oberoende av externa lastfall som t.ex. airbag, rattcentrum, eller bälteslast. I denna studie noterades det att de globala riskkriterierna inte har undersökts med väldigt lokala islag som rattislagen utgör och kommer därför att påverka risken för revbensfraktur annorlunda gentemot vad som har studerat, t.ex. airbag eller bältelast. Däremot behövs det mer data för de lokala riskkriterierna för att kunna prediktera thoraxskaderisken med ökad noggrannhet. Avslutningsvis, det är tydligt att Hybrid III har otillräckligt med givare och behöver förbättras för att kunna registrera bröstinträngning vid flera revbensnivåer. Vidare behövs följande: bättre förståelse för globala riskfunktioner anpassat inom passiv säkerhet för lastbilsförare, mer data för åldersberoende (revben) och töjningshastighetsberoende (organ) riskfunktioner, en ”tiebreak” kontakt med tangientiell glidning för bättre organkinematik, och ökad biofidelitet av materialmodeller genom att använda data från vävnadsexperiment.

The early-twentieth-century culture in western art music of idolizing the composer as the autonomous creative genius has been challenged by recent developments across musicology and creativity research literature. The composer’s music is now regarded as the product of a collaborative network, influenced by all who come into contact with it—first and foremost the performer. Yet, the nature of the performer’s creative impact on the compositional process remains under-explored. This thesis is centred on a qualitative artistic research project, designed to identify and critically evaluate the prospective extent and scope of creative performer agency; it aims to ascertain how a typical lack of familiarity with the instrument may affect the composer’s creative practice, and to reveal key factors that shape the nature and the consequences of composer-performer interaction and collaboration. It proceeds by commissioning new works for guitar from a range of composers for different performers, and by documenting and analysing the processes of collaboration that result. This research agenda challenges the perception of distinct creative roles that remains resilient in present-day cultural understandings and discourse. The findings are intended to broaden understanding of contemporary collaborative practices in the compositional process for the guitar and generalize to the guitar repertoire of the long twentieth century, during which the majority of substantial works were composed in collaboration. The thesis also contributes to a developing and generalizable framework of practice-led research literature that analyses music-making by recognizing the multiple loci and their interactions that underpin all aspects of the creative processes. Chapter 1 discusses the establishment of the creative hegemony of the composer and its opposing currents across disciplines from the late romantic period to the late twentieth century. Chapter 2 comprises an indicative chronology of select collaborations in the long twentieth-century guitar repertoire and an overview of relevant practice-led research projects in performance studies. Ethnographic methodologies are reviewed in Chapter 3 and the fieldwork commissions are analysed in Chapters 4 and 5. Finally, Chapter 6 comprises an evaluation of the performer’s creative agency and its significance when placed in broader frameworks of contemporary guitar practices, contemporary composition across instrumentations, generalizing to historical guitar collaboration and its implications for creativity research.

The goal of this thesis is to develop a hybrid _nite element formulation to carry out stress analysis of arteries. To the best of our knowledge, a hybrid _nite element impel mentation of the Holzapfel-Ogden artery model has not been carried out before. Since arteries are thin `shell-type' structures, they are subjected to membrane, shear and volumetric locking in case when standard _nite elements are used. Since hybrid _nite elements are known to overcome these problems, we develop hybrid hexahedral element formulations (both lower and higher-order) for artery analysis. We demonstrate The better coarse mesh accuracy of hybrid elements, which are based on a two-_eld variational formulation, over conventional displacement based elements. Typically, wend that three or four extra levels of renement are required with conventional elements to achieve the ame accuracy as hybrid elements. The recently proposed Holzapfel-Ogden constitutive model for the artery and its implementation both within the conventional and hybrid _nite element frameworks is discussed. The numerical implementation is particularly challenging due to the presence of _bers which can only take tensile loads. The mathematically exact tangent stiness matrix that we have derived in this work is crucial in ensuring convergence of the numerical strategy.

Made available in DSpace on 2016-04-28T20:39:28Z (GMT). No. of bitstreams: 1 Angela M M Harary.pdf: 622182 bytes, checksum: 1ed656f7ae92a8e7c4af98310faac04a (MD5) Previous issue date: 2007-06-01 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / The purpose of this paper is to discuss what happens during a psychoanalytic experience, when something with a potential for change and growth is generated and what kind of linking favors it. Also, it runs through a fundamental psychic phenomenon of a specific symbiotic quality, capable of a high degree of regenerative and/or constitutive parts of the self. This paper is justified by the fact that more and more the psychoanalytic process has been seen as a result of the pair s interpenetration (transference/ countertransference) and for what is stimulated in the analyst as knowledge about his/her patient psychodynamics. Some clinical hypotheses have been put forward to explain the occurrences of phenomena that are analogous to a kind of immersion in affectionate dimensions of low awareness but necessary to achieve a deep affectionate interaction that would keep symbiotic fusion fantasies. Seven topics are highlighted in order to corroborate to the institution of a link that could support this symbiotic process and the intensity of the emotions present on it: comprehension, love, confidence, loss, truth, companionship and closeness X distance. Results of this research related to clinical aspects are the maternal holding function, as an integrating experience that follows and supports moments of turbulence, a kind of safety net under the trapeze offering security and also the phenomenon of a symbiosis as a fundamental constitutive part of the psychism. This development of the libido previous to the PS ↔ D oscillation could be part of the same dynamics and then, would be turned into a three-part circulation process: symbiotic, disintegrated, integrated / O objetivo do trabalho é discutir o que acontece na experiência do encontro analítico, na qual gera-se algo com potencial de mudança e crescimento e qual o tipo de ligação que o favorece. Discorre, também, sobre um fenômeno psíquico fundamental, de uma qualidade definida, simbiótica, capaz de um alto grau regenerador e/ou constitutivo do self. Justifica-se por ser o processo psicanalítico, cada vez mais, entendido como o produto da interpenetração do par (transferencial/ contratransferencial) e daquilo que é suscitado no analista como forma de conhecimento sobre a dinâmica do analisando. Levantaram-se hipóteses clínicas, sobre a ocorrência de fenômenos análogos a uma espécie de imersão de determinadas dimensões afetivas, pouco conscientes, porém necessárias a uma interação afetiva profunda que guardaria aspectos de fantasias fusionais simbióticas. Destacam-se sete tópicos que corroboram para a instauração de um vínculo que dê sustentação a esse processo e à intensidade das emoções presentes: compreensão, amor, confiança, perda, verdade, companhia e proximidade X distanciamento. Como resultados dessa pesquisa, evidenciou-se no caso clínico a função de holding materno como experiência integradora que acompanha e suporta momentos de turbulência, uma espécie de rede armada sob o trapézio a oferecer segurança e, também, o fenômeno de uma simbiose fundamental a fazer parte da construção do psiquismo. Esse desenvolvimento da libido anterior à oscilação PS ↔ D, poderia, então, fazer parte da mesma dinâmica que se transformaria em uma triangulação: simbiótico, desintegrado, integrado