Submitted by Poliana Carvalho Almeida (polianacarvalhoalmeida@yahoo.com.br) on 2017-01-31T14:10:38Z No. of bitstreams: 1 Poliana Almeida Tese Versão Final.pdf: 932124 bytes, checksum: bfac1ea37d63c039e805d5f9fed345aa (MD5) / Approved for entry into archive by Maria Auxiliadora da Silva Lopes (silopes@ufba.br) on 2017-02-17T18:55:51Z (GMT) No. of bitstreams: 1 Poliana Almeida Tese Versão Final.pdf: 932124 bytes, checksum: bfac1ea37d63c039e805d5f9fed345aa (MD5) / Made available in DSpace on 2017-02-17T18:55:51Z (GMT). No. of bitstreams: 1 Poliana Almeida Tese Versão Final.pdf: 932124 bytes, checksum: bfac1ea37d63c039e805d5f9fed345aa (MD5) / Esta pesquisa teve como objetivo investigar os processos de elaboração de justificativas de gosto musical. O referencial teórico inscreve-se no campo da Filosofia (Estética) e da Sociologia da Música, levando em conta a complexidade da difusão e recepção da música pós-Indústria Cultural e das relações entre corpo e experiência estético-musical. O problema abordado nasce de questionamentos sobre a validade do gosto musical das massas e, em especial de jovens não músicos. A questão de pesquisa é: como jovens estudantes elaboram suas justificativas de gosto e preferência musical? Serão analisadas (análise de conteúdo) justificativas de preferência de estudantes do Ensino Médio, coletadas em registros de atividades de apreciação musical realizadas em turmas do 1º ano do Ensino Médio, no período de 2007 a 2013, na disciplina Artes/Música. Este trabalho traz como dados de pesquisa a caracterização do repertório musical de preferência dos estudantes no ano de 2013, antecedido por dois quadros teóricos cujos eixos são a Estética e a Sociologia da Música, e uma cartografia das justificativas de gosto musical dos estudantes, fundamentada no pensamento de Deleuze e Guattari, procurando assim verificar a hipótese de que justificativas de preferências musicais, independente do tipo de música a que se referem, seguem estruturas de pensamento elaboradas a priori, ou a posteriori, por isso, tais justificativas se equivalem e se anulam não sendo capazes de comunicar a significação da experiência musical. Assim, o julgamento musical de um “leigo” é tão válido quanto o julgamento musical de um músico. / ABSTRACT This research project aims to investigate the elaboration process justification of musical taste. The theoretical framework falls within the field of Philosophy (Aesthetics) and Sociology of Music, taking into account the complexity of the music diffusion and reception post Cultural Industry and the relationship between body and aesthetic-musical experience. The problem discussed is born of questions about the validity of the musical tastes of the masses, especially young no musicians. The research question is: how young students prepare their justifications of taste and musical preference? Will be analyzed (content analysis) the high school students justifications preference collected in the registers of music appreciation classes held in the 1st year of high school in the period 2007-2013, in the discipline Arts / Music activities. This work brings as preliminary research data to characterize the repertoire of students' preference in 2013 preceded by two theoretical frameworks whose axes are the Aesthetics and Sociology of Music, thus seeking to verify the hypothesis that justification of musical preferences, independent the type of music to which they refer, follow structures of thought elaborate a priori (music history, music theory, etc.) or a posteriori (connection to feelings and sensory experiences), so such justifications are equal

In this dissertation the aim was to investigate the usage of algorithms found in computer science and apply suitable algorithms to the problem of decoding multiple-input multipleoutput (MIMO) space-time-frequency block coded signals. It was found that the sphere decoder is a specific implementation of the A* tree search algorithm that is well known in computer science. Based on this knowledge, the sphere decoder was extended to include a priori information in the maximum a posteriori probability (MAP) joint decoding of the STFC block coded MIMO signals. The added complexity the addition of a priori information has on the sphere decoder was investigated and compared to the sphere decoder without a priori information. To mitigate the potential additional complexity several algorithms that determine the order in which the symbols are decoded were investigated. Three new algorithms incorporating a priori information were developed and compared with two existing algorithms. The existing algorithms compared against are sorting based on the norms of the channel matrix columns and the sorted QR decomposition. Additionally, the zero forcing (ZF) and minimum mean squared error (MMSE) decoderswith and without decision feedback (DF) were also extended to include a priori information. The developed method of incorporating a priori information was compared to an existing algorithm based on receive vector translation (RVT). The limitation of RVT to quadrature phase shift keying (QPSK) and binary shift keying (BPSK) constellations was also shown in its derivation. The impact of the various symbol sorting algorithms initially developed for the sphere decoder on these decoders was also investigated. The developed a priori decoders operate in the log domain and as such accept a priori information in log-likelihood ratios (LLRs). In order to output LLRs to the forward error correcting (FEC) code, use of the max-log approximation, occasionally referred to as hard-to-soft decoding, was made. In order to test the developed decoders, an iterative turbo decoder structure was used together with an LDPC decoder to decode threaded algebraic space-time (TAST) codes in a Rayleigh faded MIMO channel. Two variables that have the greatest impact on the performance of the turbo decoder were identified: the hard limit value of the LLRs to the LDPC decoder and the number of independently faded bits in the LDPC code. / Dissertation (MEng)--University of Pretoria, 2013. / gm2014 / Electrical, Electronic and Computer Engineering / unrestricted

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Presented Diploma Thesis is focused on electroanalytical determination of the herbicide Aclonifen, which belongs to a group of herbicides derived from diphenylether. These herbicides are used due to their effects - inhibition of protoporfyrinogen oxidase synthesis and also inhibition of biosynthesis of carotenoids. Due to its widespread use in agricultural, toxical effects on humans and because of its negative impacts particularly on aquatic ecosystems there is a need for methods capable of determining the presence of Aclonifen in the environment to monitor its ecological impacts. Optimal conditions for the determination of Aclonifen have been investigated in BR buffer - methanolic solution and in BR buffer. Electrochemical behavior of the substance has been studied using direct current voltammetry (DCV), differential pulse voltammetry (DPP) and adsorptive stripping voltammetry (AdSV) on the hanging mercury drop electrode (HMDE) and by using TAST polarography and differential pulse polarography (DPP) on the dropping mercury electrode (DME). UV/VIS spectrophotometric detection was used for comparison to electrochemical detection. Used wavelengths were 308 nm and 388 nm. For electrochemical determination of Aclonifen the above mentioned techniques were used and following results were obtained: DCV...

The need for modern transportation systems together with the high demand for sustainable pavements under applied loads have led to a great deal of research on concrete pavements worldwide. Development of finite element techniques enabled researchers to analyse the concrete pavement under a combination of axle group loadings and environmental effects. Consequently, mechanistic approaches for designing of concrete pavements were developed based on results of finite element analyses. However, unpredictable failure modes of concrete pavements associated with expensive maintenance and rehabilitation costs have led to the use of empiricalmechanistic approach in concrete pavement design. Despite progressive knowledge of concrete pavement behaviour under applied loads, concrete pavements still suffer from deterioration due to crack initiation and propagation, indicating the need for further research. Cracks can be related to fatigue of the concrete and/or erosion of materials in sub-layers. Although longitudinal, midedge and corner cracks are the most common damage modes in concrete pavements, Austroads method for concrete pavement design was developed based on traditional mid-edge bottom-up transverse cracking introduced by Packard and Tayabji (1985). Research presented in this thesis aims to address the most common fatigue related distresses in concrete pavements. It uses comprehensive finite element models and analyses to determine the structural behaviour of concrete pavements under vehicular loads and environmental effects. Results of this research are supported by laboratory tests and an experimental field test. Results of this research indicate that the induced tensile stresses within the concrete pavement are significantly affected by vehicle speed, differential temperature gradient and loss of moisture content. Subsequently, the interaction between the above mentioned factors and concrete damage modes are discussed. Typical dynamic amplifications of different axle groups are presented. A new fatigue test setup is also developed to take into consideration effects of pavement curvature on fatigue life of the concrete. Ultimately, results of the research presented in this thesis are employed to develop a new guide for designing concrete pavements with zero maintenance of fatigue damage.