With the rapid development in today&rsquo / s technology, reliability and performance requirements on components of various mechanical systems, which tend to be much lighter and work under much more severe working conditions, dramatically increased. In general, analysis techniques based on simplified model of structural components with linearity assumption may provide time saving for solutions with reasonable accuracy. However, since most engineering structures are often very complex and intrinsically nonlinear, in some cases they may behave in a different manner which cannot be fully described by linear mathematical models, or linear treatments may not be applicable at all. In fact, some studies revealed that deviations in the modal properties of dynamic structures gathered from measured data are due to nonlinearities in the structure. Hence, in problems where accuracy is the primary concern, taking the nonlinear effects into account becomes inevitable. In this thesis, it is aimed to analyze the harmonic response characteristics of multi degree of freedom nonlinear structures having different type of nonlinearities. The amplitude dependencies of nonlinearities are modelled by using describing function method. To increase the accuracy of the results, effect of the higher order harmonic terms will be considered by using multi harmonic describing function theory. Mathematical formulations are embedded in a computer program developed in MATLAB&reg / with graphical user interface. The program gets the system matricies from the file which is obtained by using substructuring analysis in ANSYS&reg / , and nonlinearities in the system can easily be defined through the graphical user interface of the MATLAB&reg / program.

This paper tries to contribute to the collective knowledge on Bonoli’s (2010) concept “The Activation Turn “, both as a phenomenon and a turning point for ALMP in Sweden. It is argued that the Activation Turn has been legitimized in four phases in Sweden (Identification, First organisation, Second organisation and Stabilisation phase, between years of 1991-2017). This thesis argues that the blueprint for understanding and exploring the Activation Turn as a phenomonenon is to capture and compare the discourse and how it has developed within the state during these four phases. Using two guiding research questions: How can we describe the characteristics of ALMP during each phase? And how have ALMP have changed in Sweden since the beginning of the 90’s? This paper has tried to answer these two questions by doing a content analysis that captures the dominating characteristics of ALMP during each phase and how they have changed. The analysis has been done with a help of a coding scheme, which is derived from a theoretical framework on the three elements of institutional legitimacy: regulative, normative, and cognitive element. After counting the number of coded references from 38 state documents, and then analysing and discussing the results, we came to two overall conclusions. First, there has not been an Activation Turn, shift or transformation of ALMP, since the beginning of the 90’s within the state discourse. Second, the development of ALMP in Sweden can be characterized as fairly stable and resilient against changes.

The aim of this study is to investigate the occurrence of sexist language-use in the British online newspaper The Daily Mail. The material consists of 162 articles that were analysed by using feminist stylistics. The scope of the study was limited to selected features from feminist stylistics at word- and discourse-level. The features of linguistic sexism analysed were the use of gendered generic words, naming of females and males and how female and male characters are described. The gender of the journalists was also analysed to examine if it affected the language-use in terms of sexism. The results show that linguistic sexism is expressed to some extent at both word-level and discourse-level. At word-level linguistic sexism is expressed inthe generic use of some masculine words, the difference of how first name and surname are used to refer to women and men and in the use of titles. At the level of discourse linguistic sexism is expressed in the difference of how women and men are referred to in terms of their relationship to others and in terms of appearance. The gender of the journalist did not show any significance for the language-use in terms of sexism. Considering the limited material of the study, the results might not be suitable for generalisations. The results are nonetheless interesting and it can be concluded that the toolkit of feminist stylistic is relevant to this day and that linguistic sexism exists to some extent in the online version of The Daily Mail.

This dissertation introduces a general, predictive and cost-efficient reduced-order modeling (ROM) technique for characterization of flame response under acoustic modulation. The model is built upon the kinematic flame model–G-equation to describe the flame topology and dynamics, and the novelties of the ROM lie in i) a procedure to create the compatible base flow that can reproduce the correct flame geometry and ii) the use of a physically-consistent acoustic modulation field for the characterization of flame response. This ROM addresses the significant limitations of the classical kinematic model, which is only applicable to simple flame configurations and relies on ad-hoc models for the modulation field. The ROM is validated by considering the acoustically-excited premixed methane/air flames in conical and M-shape configurations. To test the model availability to practical burners, a confined flame configuration is also employed for model evaluation. Furthermore, to investigate the generality of the ROM to the burner flame, the performance of the ROM with respect to the V-shape and the swirled V-shape is investigated. The model accuracy is evaluated concerning flame geometrical features and flame describing function, and assessed by comparing the ROM results with both experimental measurements and direct- numerical-simulation results. It is found that the flame describing/transfer functions predicted by the ROM compare well with reference data, and are more accurate than those obtained from the conventional kinematic model built upon heuristically-presumed modulation fields.

Made available in DSpace on 2014-07-29T16:25:14Z (GMT). No. of bitstreams: 1 Dissertacao_Mestrado_Aline_Faria.pdf: 2562180 bytes, checksum: 9fa5ff2aaca58f1e432aee4a2fb0428e (MD5) Previous issue date: 2009-03-27 / The present research aims at describing the integration process among the artistic languages taking place in some schools in Goiânia. They are: Centro de Ensino e Pesquisa Aplicado à Educação Cepae/UFG (regular school), Centro Livre de Artes CLA (public school for the teaching of Arts) and Mvsika! Centro de Estudos (private school for the teaching of Arts). Thus the main theme in this work is the integrated arts. The option for such an approach is not based on a devaluation of the musical education or any other specific area of the artistic education. The work seeks a contextualization of education through art that takes into account the current needs and changes influenced by globalization and the efficiency of the information which has made the individual more demanding and thirsty for something creative and different. This integration can happen in many ways, which have been described as pluridisciplinarity, interdisciplinarity, and transdisciplinarity. Some principles, defended by specialists, can help to understand each of these integration forms and, in this work, give support to the description and analysis of the integrative processes. This study seeks to describe and to analyze the practices that involve this integrative methodology in three schools of Goiânia, presenting three case studies. In each of them, the specific characteristics and the coherence level between the concepts and the practice of the educators stand out. From the theoretical reference of this research, it is possible to distinguish the presence of principles that classifies the practices as integrative and that help to define the integration form proposed. These practices are described considering, also, the situation of the integrative experiences in other places around Brazil. To do so, contact with educators (ANPPOM, ABEM, FAEB) that work with integrated artistic languages was attempted. Although only a few answers were received, the information obtained help for a better understanding of the data collected in the schools of Goiania. Considering the description of the reality of each school, relations between the information obtained through observation and the questionnaire are established, which brings a broader view of each process. Finally, the specificity of each practice is focused, as well as the common aspects of all of them, of what brings them together or draws them apart from the theoretical reference of this work and the practices described by educators of other parts of Brazil. / A presente pesquisa teve como objetivo descrever os processos de integração entre as linguagens artísticas que ocorrem em algumas escolas de Goiânia. São elas: Centro de Ensino e Pesquisa Aplicado à Educação Cepae/UFG (escola regular), Centro Livre de Artes CLA (escola pública de ensino específico de artes) e Mvsika! Centro de Estudos (escola particular de ensino específico de artes). Portanto, o tema central do trabalho são as artes integradas. A opção por tal abordagem não se baseia numa desvalorização da educação musical ou de qualquer outra área específica da educação artística. Busca-se uma contextualização da educação pela arte que leve em consideração as necessidades e mudanças na atualidade, influenciada pela globalização e pela agilidade das informações, que tornam o indivíduo mais exigente e sedento de algo criativo e diferenciado. Essa integração pode ocorrer de várias formas, que vêm sendo descritas como pluridisciplinaridade, interdisciplinaridade e transdisciplinaridade. Há princípios, defendidos por estudiosos do assunto, que auxiliam na compreensão de cada uma dessas formas de integração e que, nesse trabalho, dão suporte à descrição e análise dos processos integrativos. Este estudo busca, portanto, descrever e analisar as práticas que envolvem essa metodologia integrativa em três escolas de Goiânia, apresentando três estudos de caso. Em cada um deles, ressaltam-se as características específicas e o nível de coerência entre os conceitos e a prática dos educadores. A partir do referencial teórico do trabalho, destaca-se, em cada prática, a presença de princípios ou subsídios que as caracterizem como integrativas e que ajudam a definir a forma de integração proposta. Tais práticas são descritas considerando, também, a situação em que se encontram as experiências integrativas em outros lugares do Brasil. Para tanto, tentou-se estabelecer contatos com educadores (ANPPOM, ABEM, FAEB) que trabalhassem com as linguagens artísticas de forma integrada no Brasil. Apesar do pequeno número de respostas recebidas, as informações obtidas auxiliam numa melhor compreensão dos dados coletados nas escolas goianas. Tendo em vista a descrição da realidade de cada escola, estabelecem-se relações entre as informações obtidas através das observações das aulas e dos questionários, o que possibilita uma visão mais abrangente de cada processo. Ao final, ressalta-se não apenas a especificidade de cada prática, mas, também, os aspectos comuns a todas ou, ainda, aquilo que as aproxima ou distancia do referencial teórico do trabalho e das práticas relatadas por educadores de outras partes do país

A novel fuzzy system named as 2-way fuzzy system is developed by combining the intuitionistic fuzzy set theory with the fuzzy systems theory. The developed system is used in modelling and minimizing uncertainty and inconsistency. Uncertainty is the width of the interval introduced by the independent assignment of membership and nonmembership functions of the intuitionistic fuzzy sets / and inconsistency is the violation of the consistency inequality in this assignment. The uncertainty and inconsistency is reduced through a 2 phase training. An evaluation of the degree of reduction of inconsistency is carried out at the end of the rst phase of training by forming the shadowed set patterns of the membership and nonmembership functions. The system is further trained for a second phase in order to reduce uncertainty. There are three dierent methods developed for the stability analysis of fuzzy systems. The rst method is based on the approximating sequences technique, and the design turns into an optimal control problem. In the sec ond analysis, describing function of a 2-way fuzzy system is evaluated analytically, and a systematic design approach is developed using describing function technique. The last analysis technique employs the Lie algebra theory in the stability analysis of Takagi-Sugeno fuzzy systems. The theoretical results are simulated on an application system, which is a exible-joint robot arm system.

Made available in DSpace on 2014-12-17T14:08:38Z (GMT). No. of bitstreams: 1 AuciomarCTC_DISSERT.pdf: 1704122 bytes, checksum: fe303bbcf110f6668682831da2f3480d (MD5) Previous issue date: 2009-12-16 / The oscillations presents in control loops can cause damages in petrochemical industry. Canceling, or even preventing such oscillations, would save up to large amount of dollars. Studies have identified that one of the causes of these oscillations are the nonlinearities present on industrial process actuators. This study has the objective to develop a methodology for removal of the harmful effects of nonlinearities. Will be proposed an parameter estimation method to Hammerstein model, whose nonlinearity is represented by dead-zone or backlash. The estimated parameters will be used to construct inverse models of compensation. A simulated level system was used as a test platform. The valve that controls inflow has a nonlinearity. Results and describing function analysis show an improvement on system response / As oscila??es presentes nas malhas de controle podem causar preju?zos ? ind?stria petroqu?mica. Anular, ou at? mesmo amenizar tais oscila??es, acarretaria em uma grande economia. Estudos identificaram que um dos causadores destas oscila??es s?o as n?o linearidades presentes nos atuadores dos processos industriais. O presente trabalho tem como objetivo desenvolver uma metodologia para cancelamento dos efeitos nocivos destas n?o linearidades. Ser? proposto um m?todo de estima??o de par?metros para o modelo de Hammerstein, cuja n?o linearidade ? representada pela zona-morta ou pela folga. Os par?metros estimados ser?o usados na constru??o de modelos inversos de compensa??o. Utilizou-se um sistema de n?vel simulado como plataforma de testes, o qual possui uma v?lvula de controle de fluxo da vaz?o de entrada com uma n?o linearidade associada. Resultados e a an?lise por fun??o descritiva mostram a melhoria do comportamento da sa?da do processo

The submitted master thesis deals with finding the right combination of models describing the cladding behavior implemented in the FEMAXI-6 computational code and then comparing it with the benchmark Zaporoshye, Novovoronezh and the modified FERMAXI 6 program with implemented models describing the E110 behavior used for VVER-type reactor fuel rods. Initially, there is a description of the FEMAXI-6 nuclear fuel analysis program including its structure, calculation mechanics and input file description. Furthermore, the work presents the benchmarks used to evaluate individual combinations of fuel models. An important part is the description of the PIE measurement, including measurement uncertainty, which can affect the results of the work. The next chapter contains a description of what affects fuel behavior during irradiation, which can be mathematically expressed and modeled. The following chapter describes the material equations defining the E110 alloy used as cladding of the fuel rods and which were subsequently implemented into the FEMAXI-6 computing program. The last chapter is devoted to the description of the results with appropriate comments.

The present work is dedicated to the development of high performance integrated circuits for wireless communications, by acting of three different levels: technologies, devices, and circuits. Silicon-on-Insulator (SOI) CMOS technology is used in the frame of this work. Micromachining technologies are also investigated for the fabrication of three-dimensional tunable capacitors. The reliability of micromachined thin-film devices is improved by the coating of silanes in both liquid- and vapor-phases. Since in telecommunication applications, distortion is responsible for the generation of spurious frequency bands, the linearity behavior of different SOI transistors is analyzed. The validity range of the existing low-frequency nonlinear characterization methods is discussed. New simple techniques valid at both low- and high-frequencies, are provided, based on the integral function method and on the Volterra series. Finally, the design of a crucial nonlinear circuit, the voltage-controlled oscillator, is introduced. The describing function formalism is used to evaluate the oscillation amplitude and is embedded in a design methodology. The frequency tuning by SOI varactors is analyzed in both small- and large-signal regimes.

The master’s thesis solves models of queueing systems, which use the property of Markov chains. The queueing system is a system, where the objects enter into this system in random moments and require the service. This thesis solves specifically such models of queueing systems, in which the intervals between the objects incomings and service time have exponential distribution. In the theoretical part of the master’s thesis I deal with the topics stochastic process, queueing theory, classification of models and description of the models having Markovian property. In the practical part I describe realization and function of the program, which solves simulation of chosen model M/M/m. At the end I compare results which were calculated in analytic way and by simulation of the model M/M/m.