Dissertação (mestrado)—Universidade de Brasília, Faculdade de Educação Física, Programa de Pós-Graduação Stricto-Sensu em Educação Física, 2014. / Submitted by Ana Cristina Barbosa da Silva (annabds@hotmail.com) on 2015-01-26T19:15:07Z No. of bitstreams: 1 2014_FlaviaVanessadeAraujoMedeiros_Parcial.pdf: 1618537 bytes, checksum: a3daf8316b2aa321fca6131f83675bf5 (MD5) / Approved for entry into archive by Patrícia Nunes da Silva(patricia@bce.unb.br) on 2015-01-30T15:41:27Z (GMT) No. of bitstreams: 1 2014_FlaviaVanessadeAraujoMedeiros_Parcial.pdf: 1618537 bytes, checksum: a3daf8316b2aa321fca6131f83675bf5 (MD5) / Made available in DSpace on 2015-01-30T15:41:27Z (GMT). No. of bitstreams: 1 2014_FlaviaVanessadeAraujoMedeiros_Parcial.pdf: 1618537 bytes, checksum: a3daf8316b2aa321fca6131f83675bf5 (MD5) / Contextualização: Tem sido afirmado que a corrente de média frequência é mais eficaz do que a corrente de baixa frequência para a induzir elevado torque articular com baixo desconforto sensorial; e que a espessura da dobra cutânea (EDC) pode influenciar na eficiência da eletroestimulação neuromuscular (EENM). Entretanto, existem poucos estudos comparativos sobre o tema. Objetivo: Investigar os efeitos de duas correntes de média frequência (AUS1 e AUS2), duas de baixa freqüência (FES1 e FES2) e da EDC sobre o desconforto e o torque isométrico extensor do joelho. Métodos: O estudo foi dividido em duas partes: 1) Comparação do torque evocado por cada uma das correntes e do grau de desconforto percebido durante e imediatamente após a EENM. 2) investigação dos efeitos da EDC sobre as variáveis analisadas em dois subgrupos G1(EDC menor) e G2 (EDC maior). Resultados: Parte 1: FES1 evocou torque 21% superior a FES2 e 23% superior a AUS2. AUS1 induziu torque 21% superior a FES2 e 22% superior a AUS2 (p<0,01 em todas as comparações). Não houve diferença significativa entre FES1 e AUS1, bem como entre AUS2 e FES2 (p>0,05 nas duas comparações). Correntes com maior largura de pulso foram mais desconfortáveis que correntes com menor largura de pulso. Parte 2: G1 evocou torque 28% superior ao G2 (p<0,01), o desconforto eliciado pela EENM não diferiu significativamente entre os subgrupos (p=0,425). Conclusão: Parte 1: correntes com maior largura de pulso eliciam maior torque articular com maior desconforto. Parte 2: a EDC influencia na magnitude do torque evocado e na intensidade de corrente requerida, mas não na percepção de desconforto. / Background: It has been supposed that the medium frequency current is more effective than low frequency current to induce torque with less sensory discomfort and that skinfold thickness (SFT) can to influence on efficacy of neuromuscular electrical stimulation (NMES). However, there have been few comparative studies on the subject. Objective: To investigate the effects of two medium frequency currents (AUS1 and AUS2), two low frequency currents (FES1 and FES2) and SFT on discomfort and on the isometric knee extensor torque. Methods: The study was divided into two parts: 1) Comparison of the torque evoked by each of the currents and the degree of discomfort perceived during and immediately after the NMES. 2) investigation of the effects of skinfold thickness on the variables analysed into two subgroups G1 (lower skinfold thickness) and G2 (larger skinfold thickness). Results: Part 1: FES1 evoked torque 21% higher than FES2 (p<0,01) and 23% higher than AUS2 (p<0,01). AUS1 induced torque 21% higher than FES2 (p<0,01). Currents with smaller pulse width (FES2 and AUS2) are more comfortable than currents with higher pulse width (FES1 and AUS1). Part 2: There are significant differences between the subgroups in relation to the NMES-evoked torque; the intensity of the current correlates positively with the skinfold thickness, negatively with the evoked torque and does not correlate with the induced discomfort. Conclusion: Part 1: currents with greater pulse width induce greater joint torque with greater discomfort. Part 2: G1 evoked torque 28% higher than G2 (p<0,01), the discomfort elicited by NMES did not differ significantly between subgroups.

A dissertation submitted in compliance with the requirements for the Masters Degree in Technology in Biotechnology, Durban University of Technology, 2011. / Under environmental stress, most microalgae produce intracellular neutral lipids as a storage mechanism. In the biotechnology industry, these lipids are extracted and converted to microalgal biodiesel; however the extent of the stress is not measured for optimum lipid accumulation. In the series of studies undertaken, Pulse Amplitude Modulated (PAM) fluorometry was used to measure three types of physiological stress on Chlorella sp., a freshwater microalgal species. Biomass and lipid yields were also used as indicators of the induced stress conditions. Firstly, nutrient induced physiological stress and the subsequent synthesis of cellular neutral lipids was investigated. / M

Orientadores: Martin Tygel, Eduardo Filpo Ferreira da Silva / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-07-25T22:08:42Z (GMT). No. of bitstreams: 1 Cardoso_ClaudioGuerra_M.pdf: 5757657 bytes, checksum: 5b4ea3b5608c625fce78a747dffdf8e0 (MD5) Previous issue date: 1999 / Resumo: Atualmente, cerca de 90% das reservas brasileiras de óleo localizam-se nas porções submersas das bacias sedimentares costeiras. Nessas bacias, a sísmica de reflexão é uma das principais ferramentas de que dispõe o profissional de exploração e de desenvolvimento de campos de petróleo. Como a interpretação dos dados sísmicos considera somente as reflexões primárias, é necessário que estes estejam livres de ruídos, particularmente, da reflexão múltipla do fundo do mar, que é o ruído mais danoso em dados marítimos. A presente dissertação descreve um método novo de eliminação de múltipla do fundo do mar de 1ª ordem em configuração de afastamento fonte - receptor comum, por empilhamento Kirchhoff, mostrando exemplos numéricos de aplicação do mesmo em dados sintéticos. Num desses exemplos, no qual concorrem a múltipla e uma reflexão primária - que poderia advir de um refletor de interesse - após a eliminação da múltipla, as diferenças nas amplitudes da primária, quando comparadas com as amplitudes sem a interferência da múltipla, não ultrapassam 5%. Dessa forma, o método, por preservar as amplitudes das primárias após a eliminação da múltipla, se configura como muito adequado à geofísica de reservatórios / Abstract: At present, about 90% of Brazilian oil reserves are located in offshore sedimentary basins. In these basins, reflection seismic is one of the most important tools in exploration and field development. As seismic data interpretation only deals with primary reflections, is important to have noise-free, amplitude preserved primaries. The most harmful noise in marine data is the first-order, sea-bottom multiple reflection. This dissertation describes a new method for first order, sea-bottom, multiple elimination by means of a Kirchhoff - type stacking, in common offset configuration, showing its application to synthetic seismic data. In one of the examples, in which the multiple and a primary reflection interfere, the differences between amplitudes of primary reflection after application of the method and primary computed with no such interference are smaller than 5%. Due to the primaries amplitude-preserving property, this method provides a very reliable image to reservoir geophysics, such as amplitude versus offset analysis (AVO) and seismic attribute determination / Mestrado / Mestre em Engenharia de Petróleo

I obtained 182 session graphs from 10 client records from a university-based neurotherapy clinic and from a private practitioner. These graphs were used to examine the relationship of therapeutic crossover activity (defined as at least 3 minutes in duration and at least 1μv in amplitude) with and without predetermined amplitude thresholds of beta (15-20Hz) to client reports of imagery and to treatment outcomes. Crosstab analysis revealed that significantly more reports of imagery were observed in the therapeutic crossover with beta condition and that higher amplitudes of slower brainwave activity correlated with progression to deeper states of consciousness. Multi-level modeling revealed a significant interaction between therapeutic crossover activity, higher beta frequency amplitude, and reported salient imagery. Due to small sample size, significance testing was not deemed appropriate. However, observation in change of pre-post scores suggested that individuals who experienced more therapeutic crossover with sufficient beta amplitude conditions had greater improvements on post-test measures (BAI, BDI, BHS, PSQI and MMPI) than those with no or few crossovers. Higher amplitudes of slower brainwave activity correlated with progression to deeper states of consciousness, with delta amplitude positively correlating with transpersonal states. Reports of imagery and/or biographical memory are much more likely to occur during theta-alpha crossover activity characterized by 3 minutes or more in duration, one microvolt or more in amplitude, and 3.75μv amplitude or more of beta. This defined therapeutic crossover condition does appear to facilitate recall of imagery and memories during alpha-theta neurofeedback and was related to better treatment outcomes.

This semestral thesis describes RF power amplifier design. In the first section of the work, the possible solutionsand a reflection on the possible solution are presented. In the second section, the principle and thesis for power amplifier design is described. In the third section, the power amplifier design, based on the theoretical knowledge, is described.

This master‘s thesis describes RF power amplifier design. In the first section of the work, the possible solutions and a reflection on the possible solution are presented. In the second section, the principle and thesi for power amplifier design is described. In the third section, the power amplifier design, based on the theoretical knowledge, is described and in fourth section the finaly construction solution and real parameters are described. The last part sumarized the results of this thesis.

A large body of research relates families’ socioeconomic status (SES) to child language development (Hoff & Tian, 2005). Results from these studies indicate preschoolers from low SES backgrounds may have underdeveloped linguistic foundations required for future academic success (Sirin, 2005; Lacouri & Tissington, 2011). These differences have been said to create a 30 million word-gap between the language experiences of low and middle to high SES children by the age of 3 years. Thus, children who come from lower SES backgrounds often lack the vocabulary knowledge used in school and in textbooks (Hart & Risley, 1995). One index of SES is parental level of education, specifically maternal education (Hoff & Tien, 2005). The current study compared the language processes related to word knowledge of 17 preschoolers who live in lower maternal education attainment (LEA) homes and 17 preschoolers who live in higher maternal education attainment (HEA) homes. An event related potential (ERP) thought to index semantic congruity and comprehension monitoring, the N400, was used. Preschoolers listened to nouns and verbs presented aurally that matched or mismatched with pictures to understand how preschoolers from varying SES backgrounds process linguistic stimuli. Additionally, participants completed an Auditory Oddball Paradigm, or tone judgment task, to evaluate how preschoolers categorized and judged non-linguistic stimuli (e.g., standard and target pure tones). Tone judgment results revealed a Group x region midline interaction, indicating that the groups may recruit different neural resources to judge tones. The noun picture task results indicated that the HEA group processed familiar object labels more robustly and quicker than the LEA group. N400 results did not differ for the verb picture task. These results may indicate that both groups require more neural resources to process action labels and that perhaps verbs represent a higher level of linguistic complexity for young children. These results provide preliminary evidence of neural linguistic processing differences between preschoolers from varying socioeconomic backgrounds. Because of the lack of minimal differences on associated behavioral measures of language, one may speculate that ERP underpinnings as exemplified in the current study may hold promise for identifying subtle underlying differences in the processing of language among preschoolers

No description available.

Continuous phase modulation (CPM) is often plagued by high receiver complexity. One successful method of dealing with this is the well-known pulse amplitude modulation (PAM) representation of CPM, which was first proposed by Laurent. It is shown that the PAM representation also applies to multi-h CPM and ternary CPM, two previously unconsidered cases. In both cases it is shown that many PAM components may be required to exactly represent the signal. This is especially true of partial-response systems where the memory of the signal is long. Therefore, approximations are proposed which require only a limited number of terms. These extensions of the PAM representation are used to construct reducedcomplexity detectors for CPM. These are generalizations of the detector first proposed by Kaleh. These detectors can be used in an optimal configuration, or in a suboptimal reduced-complexity configuration. The PAM complexity-reduction principle is shown explicitly. An exact expression is given for the pairwise error probability for the entire class of PAM-based CPM detectors, not just the extended cases proposed herein. The analysis is performed for the additive white Gaussian noise (AWGN) channel. The performance bound that results from this pairwise error probability is shown to be tighter than a previously published bound for PAM-based CPM detectors. The analysis shows that PAM-based detectors are a special case of the broad class of mismatched CPM detectors. However, it is shown that the metrics for PAM-based detectors accumulate distance in a different manner than metrics for other mismatched and suboptimal detectors. These distance properties are especially useful in applications with greatly reduced trellis sizes. The proposed detectors are included in two case studies. The first is for a multi-h CPM standard used in aeronautical telemetry. Many reduced-complexity detectors are studied in addition to PAM-based detectors. The second case study is for a ternary CPM known as shaped offset QPSK (SOQPSK). Here, the performance of serially concatenated coded SOQPSK is studied along with uncoded systems. It is shown that the coded systems achieve large gains over uncoded systems. However, the design proposed herein achieves these gains with less complexity than previously published designs.

京都大学 / 新制・論文博士 / 博士(医学) / 乙第13513号 / 論医博第2263号 / 新制||医||1061(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 伊佐 正, 教授 村井 俊哉, 教授 高橋 淳 / 学位規則第4条第2項該当 / Doctor of Medical Science / Kyoto University / DFAM