Made available in DSpace on 2014-07-29T15:29:15Z (GMT). No. of bitstreams: 1 Dissertacao Mestrado Celio A de P Junior.pdf: 1252678 bytes, checksum: dfcec53ec5a0fb998ad4f3168431194e (MD5) Previous issue date: 2012-04-24 / Supraomohyoid neck dissection is an important procedure in the treatment of patients with malignancy in the oral cavity and oropharynx, however there are common side effects in the post operative period. Results of an elaborate review of literature in electronic databases to investigate the effect of a resistance exercise protocol in this population showed significant improvement in the quality of life of patients trained, however studies which deal with the issue are limited. To quantify the damage caused by post-operative supraomohyoid neck dissection, and thus develop a secure protocol of exercises for this population, this study evaluated changes in body composition, body mass index, range of motion and quality of life in patients undergoing unilateral or bilateral supraomohyoid neck dissection pre and post-operatively (30 and 90 days). In the post-operative period, the 28 patients observed showed a significant reduction in body weight, muscle weight, and fat percentage. In terms of range of motion, a reduction of flexion, extension, abduction, medial rotation and lateral rotation was detected in the post-operative period (30 and 90 days). Decreased range of motion of flexion and abduction post-operatively had a negative correlation with quality of life, especially in areas of activity, recreation, shoulder, and the total score. The results of this study indicate that a resistance exercise protocol in patients undergoing neck dissection supraomohyoid may be an alternative to reduce the adverse effects of surgery and thus improve quality of life of these patients. / O esvaziamento cervical supraomohióideo é um procedimento importante no tratamento de pacientes com neoplasia maligna na cavidade oral e orofaringe, sendo comuns efeitos colaterais no pós-operatório. Para investigar os efeitos de um protocolo de exercícios resistidos nesta população foi elaborada uma revisão de literatura em bases de dados eletrônicos e o resultado apontou significativa melhora na qualidade de vida dos pacientes treinados, porém poucos estudos abordam o tema. Para quantificar os danos causados no pós-operatório do esvaziamento cervical supraomohióideo e assim elaborar um protocolo de exercícios seguro para esta população, este estudo avaliou as alterações na composição corporal, índice de massa corporal, amplitude de movimento e qualidade de vida em pacientes submetidos à cirurgia de esvaziamento cervical supraomohióideo unilateral ou bilateral no pré e pós-operatório (30 e 90 dias). Foram estudados 28 pacientes e observou-se no pós-operatório: redução significativa da massa corporal, do peso muscular e do percentual de gordura. Quanto às amplitudes de movimento avaliadas, foram detectadas redução no pós-operatório (30 e 90 dias) dos movimentos de flexão, extensão, abdução, rotação medial e rotação lateral. A diminuição da amplitude dos movimentos de flexão e abdução do ombro no pós-operatório teve correlação negativa com a qualidade de vida dos pacientes, principalmente os domínios atividade, recreação e ombro, além do escore total. Os resultados encontrados neste estudo apontam que um protocolo de exercícios resistidos em pacientes submetidos ao esvaziamento cervical supraomohióideo poderá ser uma alternativa para reduzir os efeitos adversos da cirurgia e assim melhorar a qualidade de vida destes pacientes.

Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2016-05-04T19:47:04Z No. of bitstreams: 2 Dissertação - Helen Rosa da Silva - 2015.pdf: 1580503 bytes, checksum: b52d04d79b983417cb07f98a43ae918d (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-05-05T13:09:29Z (GMT) No. of bitstreams: 2 Dissertação - Helen Rosa da Silva - 2015.pdf: 1580503 bytes, checksum: b52d04d79b983417cb07f98a43ae918d (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) / Made available in DSpace on 2016-05-05T13:09:30Z (GMT). No. of bitstreams: 2 Dissertação - Helen Rosa da Silva - 2015.pdf: 1580503 bytes, checksum: b52d04d79b983417cb07f98a43ae918d (MD5) license_rdf: 19874 bytes, checksum: 38cb62ef53e6f513db2fb7e337df6485 (MD5) Previous issue date: 2015-03-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / Understanding how species are distributed across space and what determines where they live is one of the oldest goals in Ecology. The concept of niche is very closely related to this goal. In fact, environmental variables are frequently used to predict the potential distribution of species. Niche amplitude is an important concept which helps us to understand which part of the available environmental space each species occupies, and how much of their niches overlap. Here we used a measure of niche amplitude based on the minimum and maximum tolerances of terrestrial vertebrates (except reptiles) for each variable related to climate. We calculated a single measure of niche amplitude for each species by considering together all chosen environmental variables. We used this number to first investigate the presence of latitudinal gradient in niche amplitude across the study area, which comprised the whole terrestrial globe. There is a significant correlation between niche amplitude and latitude for Old World birds. Second we tried to identify some phylogenetic structure in niche amplitude for birds. For this goal, we calculated the pair-wise niche overlap, and then compared the degree of overlap with pair-wise phylogenetic distances. We found no relationship between niche overlap and phylogenetic distance. We conclude that the absence of phylogenetic signal in niche overlap is due to the high dispersion capability of birds in general. If species have a high geographic range, they consequently have high niche amplitude, and therefore high overlap rates. Finally, we found a clear tendency of positive local spatial autocorrelation in mean niche overlap, as neighbor cells tend to show similar rates of niche overlap between species. / Compreender os fatores que determinam a distribuição das espécies no espaço geográfico é uma das questões mais importantes em ecologia. O conceito de nicho é fortemente relacionado a essa questão. Não por acaso, variáveis ambientais são comumente usadas para inferir a distribuição potencial de espécies. Amplitude de nicho é uma medida importante que nos possibilita saber que proporção do espaço ambiental cada espécie ocupa. Assim, podemos também identificar que proporção do espaço ocupado por cada espécie, seu nicho, é sobreposta pelo nicho das espécies coexistentes. No presente trabalho utilizamos uma medida de amplitude de nicho específica baseada na soma das tolerâncias para cada variável climática utilizada. Utilizamos essa medida para investigar, primeiramente, a presença de estrutura espacial, especificamente gradiente latitudinal, na amplitude de nicho de vertebrados terrestres (exceto répteis), numa escala global. Apenas aves do Velho Mundo apresentaram amplitude de nicho negativamente associada à latitude. Posteriormente, investigamos a presença de estrutura filogenética na amplitude de nicho em Aves, baseados na hipótese de conservação de nicho. Para esse objetivo calculamos a sobreposição de nicho par-a-par e então correlacionamos essa medida com as distâncias filogenéticas. Não houve correlação entre proximidade filogenética e sobreposição de nicho. Tal resultado pode estar relacionado à grande capacidade de dispersão de aves. Se a área de ocupação geográfica é ampla, a amplitude das tolerâncias é em geral alta e consequentemente a sobreposição média entre diferentes espécies. Finalmente houve forte indício de autocorrelação espacial positiva na sobreposição média por célula entre células próximas, indicando que áreas próximas tendem a apresentar espécies com taxas semelhantes de sobreposição de nicho.

Objetivo: Avaliar a amplitude de pulso ocular (APO) em pacientes com hipertensão arterial sistêmica, comparando com o grupo controle, e eventuais influências da espessura central da córnea e do comprimento axial (COMPRaxial) do olho na APO. Método: Foram examinados 152 olhos de 76 pacientes com hipertensão arterial sistêmica e 136 olhos de 68 indivíduos que compuseram o grupo controle. Todas as medidas foram tomadas pelo mesmo examinador, no período das 7 às 10h da manhã, na seguinte ordem: pressão arterial sistêmica, tonometria de contorno dinâmico, COMPRaxial e paquimetria (PAQ). A análise estatística foi realizada utilizando-se o teste t para médias de dados pareados e, para as correlações, os coeficientes de Pearson ou o de Spearman. Considerou-se o nível de significância de 5%. Resultados: A APO média dos olhos direitos dos pacientes com hipertensão arterial sistêmica foi 2,10 (+/- 0.9 mmHg) e a dos olhos esquerdos foi 2,03 (+/-0,828 mmHg). A PAQ média dos olhos direitos foi 532.2 mµ (+/- 39 mµ), e a dos olhos esquerdos 532.1 mµ (+/- 36.5 mµ), não influenciando a APO. A variável COMPRaxial para o olho direito (OD) apresentou média de 23,44 mm (+/- 1.477 mm) e para o olho esquerdo (OE) foi de 23.343 em média (+/- 1,32 mm). Houve significância estatística quando estudada a influência do COMPRaxial sobre a APO, demonstrando correlação inversamente proporcional. A média da APO dos controles foi de 2,10 (+/- 0.9 mmHg) e para o OD e OE média de 2,03 (+/-0,828 mmHg). Quando comparados os valores médios da APO dos casos e controles, a diferença foi estatisticamente significante, sendo os valores dos controles maiores do que os encontrados nos pacientes com hipertensão arterial sistêmica (p <0 ,001). Constatou-se que existe diferença entre caso e controle, tanto para o OD quanto para o OE. Conclusões: O valor médio de APO foi menor nos pacientes com hipertensão arterial sistêmica do que nos controles; a APO não foi influenciada pela espessura central da córnea; e olhos com maior COMPRaxial apresentaram APO menor / Objective: The objectives of this study were to assess the ocular pulse amplitude (OPA) in patients with hypertension, compared with control group and to evaluate possible influences of central corneal thickness and axial length of eye in OPA. Method: We evaluated 152 eyes of 76 patients with hypertension and 136 eyes of 68 individuals who comprised the control group. All measurements were made by the same examiner in the period of 7 am and 10 am, in following order: blood pressure, dynamic contour tonometry, axial length and pachymetry. Statistical analysis was performed using the t test for paired data and averages for correlations, the Pearson correlation coefficients of Spearman. Considered the significance level of 5%. Results: The average OPA in right eyes of patients with hypertension was 2.10 (standard deviation (SD) 0.9 mmHg) and in left eyes was 2.03 (SD =0.828 mmHg). The average pachymetry of right eyes was 532.2 mµ (+/- 39 mµ); and for left eyes was 53.1 mµ ( +/-36.5 mµ). The variable diameter axial in right eye showed an average of 23.44 mm (+/- 1.477 mm); for the left eye 23,343 mm (+/- 1.32). There was statistical significance when studied the influence of the axial diameter of OPA, with inverse correlation. The average of controls OPA was presented mean 2.10 (+/- 0.9 mmHg) for the right eye and the left mean 2.03 (+/- 0.828 mmHg). When comparing the mean values of OPA in cases and controls the difference was statistically significant, the values of the controls are larger those found in patients with hypertension (p<0,001), so it was found difference between cases and controls, both for the right and left eye. Conclusions: The mean OPA was lower in patients with hypertension than in controls, the OPA was not influenced by central corneal thickness, and eyes with greater axial length showed lower OPA

INTRODUÇÃO: O tratamento do câncer de mama está associado à morbidade do membro superior, com complicações que têm um impacto significante na qualidade de vida das pacientes. O OBJETIVO deste trabalho foi traçar um protocolo de tratamento fisioterapêutico para prevenir as morbidades após cirurgia de câncer de mama. CASUÍSTICA E MÉTODOS: Este estudo avaliou 132 mulheres com a intervenção da fisioterapia em dois momentos: no primeiro pós-operatório (PO) e entre o 10º - 15º dia do PO. Reavaliações foram feitas nos meses 1, 2, 3, 4, 5, 6 e após um ano do PO. RESULTADOS: O grupo de intervenção precoce mostrou uma recuperação mais rápida da amplitude de movimentos e apresentou menor morbidade em relação ao grupo tardio. CONCLUSÃO: O protocolo fisioterapêutico preconizado, tanto precoce quanto tardio, é eficaz. A recuperação da função do membro superior e o menor índice de morbidades mostram que a fisioterapia deve sempre ser instituída nas pacientes que se submetem à cirurgia de câncer de mama. / INTRODUCTION: The breast cancer treatment is always linked with the morbidity of the upper limb with complications that will have an enormous impact in the quality of life of the patients submitted to breast cancer treatment. Objective : the objective of this study was to develop a physiotherapy protocol in order to prevent morbidities after breast cancer treatment METHODS: This study evaluated 132 patients submitted to physiotherapy sessions in two different moments: 1 st day post surgery and at the 10-15 th day . Follow-ups were made on months 1, 2, 3, 4, 5, 6 and after a year. RESULTS: The earlier group showed a faster recovery of arm range of motion and had less arm morbidity. CONCLUSÃO: O RESULTS: G1 showed a faster flexion and abduction ROM recovery and had less morbidity as compared to the other group. The arm circumferences in the early intervention group had lower values as compared to the late intervention group. CONCLUSION: The physiotherapy protocol used in the study showed its efficacy. The upper arm ROM was recovered and both groups had less arm morbidity.

O objetivo do trabalho foi avaliar clinicamente os possíveis efeitos dos exercícios fisioterapêuticos propostos em comparação com o acompanhamento observacional dos pacientes com DLCP. Foi um estudo prospectivo controlado incluindo 20 pacientes com DLCP unilateral, divididos em dois grupos: grupo A, acompanhamento observacional e grupo B, acompanhamento fisioterapêutico. Foram avaliados os parâmetros: amplitude de movimento articular (ADM), o grau de força muscular e o grau de disfunção articular e o quadro radiográfico, pré e pós-tratamento. Houve no grupo B uma melhora significativa da ADM do quadril, enquanto no grupo A ocorreu uma piora. A força muscular também melhorou no grupo B, enquanto no grupo A não houve alteração. O grau de disfunção articular apresentou, uma melhora significativa no grupo B e uma piora no grupo A. O tratamento fisioterapêutico empregado no grupo B foi eficaz para os pacientes com DLCP. / The purpose of the present study was to clinically evaluate possible effects of the proposed physiotherapeutic exercises compared to observational follow-up in LCPD patients. A prospective follow-up study with control group was conducted with 20 unilateral LCPD patients divided into two groups: group A (observational follow-up) and group B (physiotherapeutic follow-up). The following parameters were assessed: articular range of motion (ROM), level of muscular strength, level of articular dysfunction, and radiographic status, both before and after the treatment. Group B showed significant ROM improvement of the hip, while in group A worsening occurred. Muscular strength also improved in group B, while group A showed no changes. The level of articular dysfunction showed significant improvement in Group B and worsening in group. The physiotherapeutic treatment (group B) was efficient for patients with LCPD.

Orientador: Luis Otavio Zanatta Sarian / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-21T04:27:36Z (GMT). No. of bitstreams: 1 Oliveira_RizaRutede_D.pdf: 3665595 bytes, checksum: c294e626a3d55db7e5a9c766b7858908 (MD5) Previous issue date: 2012 / Resumo: Objetivo: Avaliar prospectivamente a recuperação da amplitude de movimento do ombro (ADM), a frequência das complicações pós-operatórias e a qualidade de vida (QV) de mulheres mastectomizadas(M) submetidas ou não à reconstrução mamária imediata (RI). Sujeitos e métodos: Foram incluídas mulheres operadas no Hospital da Mulher Prof. Dr. José Aristodemo Pinotti (CAISM/UNICAMP) entre setembro de 2007 a junho de 2009. A parte destinada à avaliação da ADM e das complicações, foi formada de 104 mulheres mastectomizadas, 47 delas com reconstrução por meio do músculo grande dorsal (M+RI). A ADM foi avaliada através de goniometria. As complicações (aderência tecidual, deiscência, web síndrome e dor) foram avaliadas por inspeção, palpação e Escala Análoga Visual. As avaliações foram realizadas na internação, antes da cirurgia, e repetidas após 1,3,6 e 12 meses. A estatística foi realizada através do programa R, com níveis de significância de 5%. Análise de covariância (ANCOVA) foi utilizada para a comparação dos valores médios das ADMs do ombro (em graus, dicotomizada em flexão e abdução) entre os grupos (M+RI ou M). Análise de variância multivariada (MANOVA), para medidas repetidas, foi utilizada para a avaliação da recuperação da ADM ao longo do pós-operatório, em até 12 meses. Testes qui-quadrado e exato de Fisher foram utilizados para avaliar a frequência das complicações. Na parte do estudo destinada à QV, foram selecionadas 76 mulheres mastectomizadas (41 delas submetidas a qualquer tipo de reconstrução mamária imediata), que responderam ao questionário WHOQOL-100 na internação e após 1 e 6 meses de cirurgia. A análise foi realizada conforme roteiro da OMS, escrito em sintaxe para o programa estatístico SPSS. Para análise comparativa entre grupos foram utilizados os testes t de student, exato de Fisher, qui-quadrado e Mann-Whitney quando os dados eram paramétricos. Para análise de medidas repetidas (ao longo do tempo) foi utilizado ANOVA e em caso de dados não paramétricos, ANOVA de Friedman. Resultados: Realizar reconstrução com GD não esteve relacionado com restrição nas ADMs de flexão (p=0,24) ou abdução (p=0,08). Após 12 meses, mulheres reconstruídas apresentam melhores ADMs de flexão (169º no grupo M+RI versus 158º no grupo M; p<0,.01) e abdução (172º no grupo M+RI versus 160º no grupo M; p=0,01). Ao longo do tempo, ambos os grupos obtiveram melhora da ADM de forma significativa (p<0,01). Deiscência e aderência foram significativamente menos frequentes no grupo M+RI (51,8% vs 22,2%; p=0,009; 25,0% versus 5,0%; p=0,032, respectivamente). Com relação à QV, o grupo reconstruído apresentou melhor pontuação no domínio psicológico (p=0,0401); em ambos os grupos houve redução significativa do nível de independência no primeiro mês pós-operatório (p=0,0004), com recuperação significativa após 6 meses (p=0,0218). Conclusões: RI pelo GD não restringe a recuperação da ADM e está associado com menor frequência de aderência e deiscência cicatricial. Mulheres reconstruídas são mais favorecidas nos aspectos psicológicos da QV / Abstract: Objective: To prospectively evaluate the recovery of shoulder range of motion (ROM), the frequency of postoperative complications and quality of life (QOL) of women who underwent mastectomy (M) or not immediate breast reconstruction (IR). Subjects and Methods: We included women operated in the Women's Hospital Prof. Dr. José Aristodemo Pinotti (CAISM / UNICAMP) between September 2007 and June 2009. The part of the study devoted to the assessment of ADM and complications, was formed of 104 women who underwent mastectomy, 47 of them with reconstruction by latissimus dorsi muscle (M + IR). ADM was assessed by goniometry. Complications (tissue adherence, dehiscence, web syndrome and pain) were assessed by inspection, palpation and Visual Analogue Scale. Evaluations were performed on admission, before surgery, and again after 1,3,6 and 12 months. Statistical analysis was performed using the R program, with significance levels of 5%. Analysis of covariance (ANCOVA) was used to compare mean values of shoulder ROM (in degrees dichotomized into flexion and abduction) between the groups (M+RI or M). Multivariate analysis of variance (MANOVA) for repeated measures was used to assess the recovery of ROM during the postoperative period, within 12 months. Chi-square and Fisher's exact test were used to evaluate the frequency of complications. In the part of the study aimed at evaluating QOL, we selected 76 women who underwent mastectomy (41 of them underwent any kind of immediate breast reconstruction), who responded to the questionnaire WHOQOL-100 on admission and after 1 and 6 months after surgery. The analysis was performed according to the WHO script, written in the syntax for SPSS. For comparison between groups we used the Student t test, Fisher exact test, chi-square and Mann-Whitney. For analysis of repeated measures (over time) ANOVA was used and in case of non-parametric data, Friedman ANOVA. Results: Performing reconstruction with GD was not related to restriction on flexion (p = 0.24) or abduction (p = 0.08). After 12 months, women who underwent reconstruction showed better flexion (169 in group M + RI versus 158 in group M, p <0.01) and abduction (172 in group M + RI versus 160 ° in group M, p = 0.01). Over time, both groups showed significant improvement of shoulder ROM (p <0.01). Dehiscence and adherence were significantly less frequent in the group M + RI (51.8% vs 22.2%, p = 0.009, 25.0% versus 5.0%, p = 0.032, respectively). Regarding QOL, the reconstructed group showed better scores in the psychological domain (p = 0.0401); in both groups there has been a significant reduction in the level of independence in the first month postoperatively (p = 0.0004), with significant recovery after 6 months (p = 0.0218). Conclusions: IR with LDF does not restrict the recovery of ROM and is associated with a lower frequency of adhesion and scar dehiscence. Women who undergo IR are favored on the psychological aspects of QOL / Doutorado / Oncologia Ginecológica e Mamária / Doutora em Ciências da Saúde

Cette thèse de doctorat porte sur la description analytique des phénomènes acoustophorétiques, en solutions et suspensions. L'acoustophorèse est la création d'un champ électrique par une onde acoustique.La première partie porte sur les solutions d'électrolytes, et est basée sur l'analyse critique de la littérature. A partir des différents articles, un modèle original, basé sur la résolution des équations de la dynamique pour les ions est trouvé, lequel permet la prédiction, sans paramètres ajustables, de l'acoustophorèse des sels simples pour des solutions allant de très diluées à assez concentrées. Ce modèle est ensuite étendu aux cas de solutions avec trois espèces ioniques différentes, et un programme informatique calculant l'acoustophorèse en fonction de la concentration est en annexe. Une seconde extension est faite pour les liquides ioniques, et permet de déduire le volume des ions. Des tentatives d'extension du modèle sont faites pour les micelles et les colloïdes, en précisant les écueils. Une deuxième approche, basée sur la thermodynamique irréversible et les relations de réciprocité d'Onsager, est faite dans le cas des suspensions colloïdales. Les principaux résultats sont la proportionnalité entre l'acoustophorèse et la mobilité électrique des colloïdes, et donc l'applicabilité de cette technique à la caractérisation des suspensions, y compris concentrées ; le lien rigoureux entre l'acoustophorèse et son corollaire, la création d'une onde acoustique et son champ électrique ; enfin une procédure pour séparer le signal des colloïdes du signal de l'électrolyte support dans l'acoustophorèse des suspensions réelles. / This Ph.D. thesis is on the analytical description of acoustophoretic phenomena, in solutions and suspensions. Acoustophoresis is the creation of an electric field by an acoustic wave.First part is on electrolytic solutions, and it begins by a critical review of literature, from Debye first paper to a recent Ph.D. thesis on the same subject. Hypotheses are carefully selected, and a new model is deduced. This model, using pressure, friction, electric, inertia and corrective force, allows the prediction of acoustophoresis up to 0,3 molar for a simple salt, without any fitting parameter. An extension to solutions with three ionic species is done, and a Fortran program to compute the acoustophoresis as a function of the concentration is given in annex. Extension of the model, in the case of ionic liquid, allows the measurement of the volume of ions. A brief point is done on micellar and colloidal suspensions. A second part is on the application of non-equilibrium thermodynamic, especially Onsager reciprocal relation, to the acoustophoresis of suspensions. Acoustophoresis is shown to be proportional to the electric mobility, which allows the measurement of the latter in dark and concentrated suspensions. A link between acoustophoresis and the creation of acoustic wave by an electric field is also found, and a process to isolate contributions of colloids in real suspensions, with a supporting electrolyte, is proposed.

Abstract In this thesis, novel data and channel estimation methods are proposed and analyzed for low-complexity short-range communication (SRC) radios. Low complexity is challenging to achieve especially in very wideband or millimeter-wave SRC radios where phase recovery and energy capture from numerous multipaths easily become a bottleneck for system design. A specific type of transceiver is selected using pulse amplitude modulation (PAM) at the transmitter and energy detection (ED) at the receiver, and it is thus called an ED-PAM system. Nonnegative PAM alphabets allow using an ED structure which enables a phase-unaware detection method for avoiding complicated phase recovery at the receiver. Moreover, the ED-PAM approach results in a simple multipath energy capture, and only one real decision variable, whose dimension is independent of the symbol alphabet size, is needed. In comparison with optimal phase-aware detection, the appealing simplicity of suboptimal ED-PAM systems is achieved at the cost of the need for a higher transmitted signal energy or shorter link distance for obtaining a sufficient signal-to-noise ratio (SNR) at the receiver, as ED-PAM systems are more vulnerable to the effects of noise and interference. On the other hand, the consequences of requiring a higher SNR may not be severe in the type of SRC scenarios where a sufficient received SNR is readily available due to a short link distance. Furthermore, significant interference can be avoided by signal design. However, what has slowed down the development of ED-PAM systems is that efficient symbol decision threshold estimation and related error probability analysis in multipath fading channels have remained as unsolved problems. Based on the above observations, this thesis contributes to the state-of-the-art of the design and analysis for ED-PAM systems as follows. Firstly, a closed-form near-optimal decision threshold selection method, which adapts to a time-varying channel gain and enables an arbitrary choice of the PAM alphabet size and an integer time-bandwidth product of the receiver filters, is proposed. Secondly, two blind estimation schemes of the parameters for the threshold estimation are introduced. Thirdly, analytical error probability evaluation in frequency-selective multipath fading channels is addressed. Special attention is given to lognormal fading channels, which are typically used to model very wideband SRC multipath channels. Finally, analytical error probability evaluation with nonideal parameter estimation is presented. The results can be used in designing low-complexity transceivers for very wideband and millimeter-wave wireless SRC devices of the future. / Tiivistelmä Tässä työssä esitetään ja analysoidaan uusia data- ja kanavaestimointimenetelmiä, joiden tavoitteena on yksinkertaistaa lähikommunikaatiota (short-range communication, SRC) langattomien laitteiden välillä. SRC-radioiden yksinkertainen toteutus on poikkeuksellisen haasteellista silloin, kun käytetään erittäin suurta kaistanleveyttä tai millimetriaaltoalueen tiedonsiirtoa. Tällöin vastaanottimen yksinkertaisen toteutuksen voivat estää esimerkiksi kantoaallon vaiheen estimointi ja signaalienergian kerääminen lukuisilta kanavan monitiekomponenteilta. Näistä lähtökohdista valitaan SRC-radion järjestelmämalliksi positiiviseen pulssiamplitudimodulaatioon (pulse amplitude modulation, PAM) perustuva lähetin ja energiailmaisimeen (energy detection, ED) perustuva vastaanotin. ED-PAM-järjestelmän ei tarvitse tietää vastaanotetun signaalin vaihetta ja signaalienergian kerääminen tapahtuu yksinkertaisen diversiteettiyhdistelytekniikan avulla. Lisäksi ilmaisuun tarvitaan vain yksi reaalinen päätösmuuttuja, jonka dimensio on riippumaton PAM-tasojen määrästä. ED-PAM-tekniikan yksinkertaisuutta optimaaliseen vaihetietoiseen ilmaisuun verrattuna ei saavuteta ilmaiseksi. Yhtenä rajoituksena on alioptimaalisen ED-PAM-tekniikan luontainen taipumus vahvistaa kohinan ja häiriöiden vaikutusta symbolin päätöksenteossa. Kohinan vahvistus ei välttämättä ole suuri ongelma niissä SRC-radioissa, joissa pienen linkkietäisyyden johdosta riittävä signaali-kohinasuhde vastaanottimessa voidaan kohinan vahvistuksesta huolimatta saavuttaa. Myös häiriöiden vahvistuksen vaikutusta voidaan tehokkaasti vähentää signaalisuunnittelulla. Joka tapauksessa ED-PAM-tekniikan käyttöönottoa on hidastanut tehokkaiden symbolipäätöskynnysten estimointi- ja analysointimenetelmien puuttuminen. Edellä mainitut havainnot ovat motivoineet löytämään uusia suunnittelu- ja analyysimenetelmiä ED-PAM-järjestelmille seuraavasti. Symbolipäätöskynnysten estimointiin johdetaan lähes optimaalinen suljetun muodon menetelmä, joka kykenee adaptoitumaan muuttuvassa kanavassa ja valitsemaan mielivaltaisen kokonaisluvun sekä PAM-tasojen määrälle että vastaanottimen aika-kaistanleveystulolle. Lisäksi esitetään kaksi sokeaa päätöskynnysten estimointimenetelmää, jotka eivät tarvitse redundanttista opetussignaalia. Työn toisessa osassa ED-PAM-järjestelmän symbolivirhesuhdetta analysoidaan taajuusselektiivisessä monitiekanavassa. Analyysissä keskitytään log-normaalijakauman mukaan häipyvään kanavaan. Seuraavaksi analyysia laajennetaan ottamalla mukaan epäideaalisten kynnysarvojen estimoinnin vaikutus. Saavutettuja tuloksia voidaan hyödyntää erittäin laajakaistaisten ja millimetriaaltoalueen SRC-laitteiden suunnittelussa.

>Magister Scientiae - MSc / An accurate prediction of pore pressure is an essential in reducing the risk involved in a well or field life cycle. This has formed an integral part of routine work for exploration, development and exploitation team in the oil and gas industries. Several factors such as sediment compaction, overburden, lithology characteristic, hydrocarbon pressure and capillary entry pressure contribute significantly to the cause of overpressure. Hence, understanding the dynamics associated with the above factors will certainly reduce the risk involved in drilling and production. This study examined three deep water drilled wells GA-W1, GA-N1, and GA-AA1 of lower cretaceous Hauterivian to early Aptian age between 112 to 117.5 (MA) Southern Pletmos sub-basin, Bredasdorp basin offshore South Africa. The study aimed to determine the pore pressure prediction of the reservoir formation of the wells. Eaton’s resistivity and Sonic method are adopted using depth dependent normal compaction trendline (NCT) has been carried out for this study. The variation of the overburden gradient (OBG), the Effective stress, Fracture gradient (FG), Fracture pressure (FP), Pore pressure gradient (PPG) and the predicted pore pressure (PPP) have been studied for the selected wells. The overburden changes slightly as follow: 2.09g/cm3, 2.23g/cm3 and 2.24g/cm3 across the selected intervals depth of wells. The predicted pore pressure calculated for the intervals depth of selected wells GA-W1, GA-N1 and GA-AA1 also varies slightly down the depths as follow: 3,405 psi, 4,110 psi, 5,062 psi respectively. The overpressure zone and normal pressure zone were encountered in well GA-W1, while a normal pressure zone was experienced in both well GA-N1 and GA-AA1. In addition, the direct hydrocarbon indicator (DHI) was carried out by method of post-stack amplitude analysis seismic reflectors surface which was used to determine the hydrocarbon prospect zone of the wells from the seismic section. It majorly indicate the zones of thick hydrocarbon sand from the amplitude extraction grid map horizon reflectors at 13AT1 & 8AT1 and 8AT1 & 1AT1 of the well GA-W1, GA-N1 and GA-AA1 respectively. These are suggested to be the hydrocarbon prospect locations (wet-gas to Oil prone source) on the seismic section with fault trending along the horizons. No bright spot, flat spot and dim spot was observed except for some related pitfalls anomalies

Approved for public release; distribution is unlimited. / Trellis-Coded Modulation (TCM) is employed with quadrature amplitude modulation (QAM) to provide error correction coding with no expense in bandwidth. There are two common implementations of TCM, namely pragmatic TCM and Ungerboeck TCM. Both schemes employ Viterbi algorithms for decoding but have different code construction. This thesis investigates and compares the performance of pragmatic TCM and Ungerboeck TCM by implementing the Viterbi decoding algorithm for both schemes with 16-QAM and 64-QAM. Both pragmatic and Ungerboeck TCM with six memory elements are considered. Simulations were carried out for both pragmatic and Ungerboeck TCM to evaluate their respective performance. The simulations were done using Matlab software, and an additive white Gaussian noise channel was assumed. The objective was to ascertain that pragmatic TCM, with its reduced-complexity decoding, is more suitable to adaptive modulation than Ungerboeck TCM. / Civilian