Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-08-05T13:30:11Z No. of bitstreams: 1 ISRAEL BURITÍ GALVÃO - DISSERTAÇÃO PPGMAT 2012..pdf: 650302 bytes, checksum: a18f67c466fa85d401a769d86e98be3a (MD5) / Made available in DSpace on 2018-08-05T13:30:11Z (GMT). No. of bitstreams: 1 ISRAEL BURITÍ GALVÃO - DISSERTAÇÃO PPGMAT 2012..pdf: 650302 bytes, checksum: a18f67c466fa85d401a769d86e98be3a (MD5) Previous issue date: 2012-03 / CNPq / Nesta dissertação foi feita uma abordagem sobre identidades polinomiais para o produto tensorial de duas álgebras. Com base no crescimento da sequência de codimensões de uma PI-álgebra, estudado inicialmente por Regev em 1972, apresentamos uma prova de que o produto tensorial de duas PI-álgebras é ainda uma PI-álgebra. Depois, através do produto de Kronecker de caracteres e do clássico Teorema do Gancho de Amitsur e Regev, obtemos relações entre as codimensões e os cocaracteres de duas PI-álgebras e as codimensões e cocaracteres do seu produto tensorial. Também através do estudo de codimensões e cocaracteres, conseguimos exibir identidades polinomiais para o produto tensorial. / In this dissertation we study polynomial identities for the tensor product of two algebras. Based on the growth of the PI-algebra’s codimensions sequence, originally studied by Regev in 1972, we present a proof that the tensor product of two PI-algebras is still a PI-algebra. After this, using the Kronecker product of characters and the classic Amitsur and Regev Hook Theorem, we obtained relations between the codimensions and cocharacters of two PI-algebras and the codimensions and cocharacters of their tensor product. With the study of codimensions and cocharacters, we also exhibit polynomial identities for the tensor product.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-08-02T20:44:35Z No. of bitstreams: 1 JOSEFA ITAILMA DA ROCHA - DISSERTAÇÃO PPGMAT 2011..pdf: 536621 bytes, checksum: 06e799bb53766cc5565089a6028e876f (MD5) / Made available in DSpace on 2018-08-02T20:44:35Z (GMT). No. of bitstreams: 1 JOSEFA ITAILMA DA ROCHA - DISSERTAÇÃO PPGMAT 2011..pdf: 536621 bytes, checksum: 06e799bb53766cc5565089a6028e876f (MD5) Previous issue date: 2011-12 / Capes / Neste trabalho usamos a Teoria de Young para representações dos grupos simétricos no estudo de PI-álgebras. Amitai Regev (1972) introduziu os conceitos de codimensão e cocaracter de uma PI-álgebra, os quais foram as principais ferramentas desse estudo. Apresentamos inicialmente o Teorema do Gancho, que foi demonstrado por Amitsur e Regev em 1982. Esse teorema refere-se ao comportamento da sequência de cocaracteres de uma PI-álgebra, dando condições para que um caracter irredutível do grupo Sn apare¸ca com multiplicidade n˜ao nula na decomposição do n-ésimo cocaracteres dessa PI-álgebra. Apresentamos também três aplicações desse teorema, entre elas o Teorema de Amitsur, que garante que toda PI-álgebra satisfaz uma potência de algum polinˆomio standard. Por fim, estudamos resultados de Amitsur e Regev de 1982 sobre um tipo de identidade que generaliza as identidades de Capelli. / In this work we use Young’s Theory for representations of the symmetric groups in the study of PI-algebras. Amitai Regev (1972) introduced the concepts of codimension and cocharacter of PI-algebras, which are the main tools in this study. We first present the Hook Theorem, which was proved by Amitsur and Regev in 1982. This theorem refers to the behavior of the sequence of cocharacters of a PI-algebra, giving conditions for an irreducible character of the group Sn to appear with nonzero multiplicity in the decomposition of the cocharacter of this PI-algebra. We also present three applications of this theorem, including the Amitsur’s theorem, which ensures that all PI-algebra satisfies a power of a standard polynomial. Finally, we study the results of Amitsur and Regev (1982) about a type identity that generalizes the Capelli identities

Made available in DSpace on 2015-04-11T13:54:35Z (GMT). No. of bitstreams: 1 Dissertacao Washington Carlos da Silva Mendonca.pdf: 484370 bytes, checksum: a48adf077b33b55e5d78ab164b39391d (MD5) Previous issue date: 2009-08-09 / Fundação de Amparo à Pesquisa do Estado do Amazonas / This study valuated the caimans hunting with hook practiced in the Low Purus river at the Sustainable Development Reserve (RDS) Piagaçu-Purus, Central Amazon. This activity is realized by the riveriner aim the caiman meat production in salt-dry to supply the interstates trade. The knowledge scenery about the hunting of caiman with hook was put in public since 2003, however, not much is know about this catch effects on the caiman hunting productivity and its catch length. Aim to valuate the effect of this catch, were accompanied 31 caiman hunting with hook in the period of February to October 2008. Multiple Linear Regressions and Simple Linear Regression Analyzes were applied to model the caiman catch production and size. The mass of meat produced by the hunting were modeling in function of the river water level, community distance and hunting effort using hook. Were caught 124 caimans, where: 53 with suspense hook and 71 with the hook armed under land. The modeling of the size of hook and to water deep explained 48% of caiman length variance, while the modeling that used the height of hook parameter above the water surface and water deep explain 38% of this variance. The Simple Linear Regression was utilized to modeling the caiman length caught in function of distance hook traped under land from the interface water-land, showing a variance of 60% for the sample size. The hunting effect presented in this study indicates the intensive hunting pressure on the caiman population, confirmed through produced caiman meat decreasing near to hunters communities. Confirmed through Multiple Linear Regression values expressed for 70% of variance for this production. Was observed too that the caiman hunting are proportionally inverse to the river water level. The Caiman crocodilus caught length present higher abundance of individual above 70cm of snout-vent length. This indicate that the hunting method guard the replacement individuals to maintain the caiman population. While the Melanosuchus niger specie had the higher abundance of caught individual sub adult, noting the reduction of big adults. The absence of this caiman length class sustain the hypothesis that the individual lenght structure of M. niger population are probably affected by the intense hunting pressure. The results presented can be utilized to subsides the public policy for assert the sustainable management of caiman in the Amazon States, Brazil. / Este estudo avaliou a caça de jacaré com anzol praticada no baixo Rio Purus na Reserva de Desenvolvimento Sustentável (RDS) Piagaçu-Purus, Amazônia Central. Esta atividade é realizada pelos ribeirinhos e visa à produção de carne de jacaré seco-salgada para abastecer o comércio interestadual. O conhecimento do cenário sobre a caça de jacaré com anzol foi levado a publico em 2003, no entanto, pouco se sabe sobre os efeitos desta caça quanto à sua produtividade e tamanho de captura. Com intuito de avaliar o efeito desta prática, foram acompanhadas 31 caçadas de jacaré com anzol no Período de fevereiro a outubro de 2008. Análises de Regressão Linear Múltipla e Simples foram aplicadas para modelar a produção e tamanho dos jacarés capturados. A quantidade de carne produzida por caçada foi modelada em função da cota do rio, da distância da comunidade e do esforço de caça com anzol. Foram capturados 124 jacarés, onde: 53 com anzol suspenso e 71 com anzol armado sobre o solo. A modelagem do tamanho do anzol e da profundidade da água explicou 48% da variância dos tamanhos dos jacarés, enquanto que o modelo que utilizou os parâmetros da altura do anzol acima da lâmina de água e profundidade da água explicou 38% dessa variância. A Regressão Linear Simples foi utilizada para modelar o tamanho do jacaré capturado em função da distância do anzol armadilhado em terra até a interface água-terra, mostrando uma variância de 60% no tamanho dos exemplares. Os efeitos da caça de jacaré apontados neste estudo indicam intensa pressão de caça sobre o estoque, confirmado através da diminuição de carne produzida próximo as comunidades ali instaladas. Confirmado através dos valores da Regressão Linear Múltipla que expressou 70% de variância nessa produção. Foi observado também, que a captura do jacaré é inversamente proporcional ao nível do rio. Os tamanhos dos Caiman crocodilus capturados apresentaram maior abundância de indivíduos acima de 70 cm de comprimento rostro-cloacal indicando que o método de caça resguarda indivíduos repositores para a manutenção da população. Enquanto que a espécie Melanosuchus niger, teve a maior abundância de indivíduos capturados subadultos, notando-se baixa de grandes adultos. A ausência desta classe de tamanho sustenta a hipótese de que a estrutura de tamanho dos indivíduos na população de M. niger é provavelmente afetada pela intensa pressão de caça. Os resultados apresentados podem ser utilizados para subsidiar políticas publicas que possam assegurar o manejo sustentável do jacaré no Estado do Amazonas.

Understanding modern carbonate depositional systems gives valuable insights into the interpretation of ancient carbonate systems. Ancient carbonate strand plains have the potential to act as productive hydrocarbon reservoirs because of their relatively high porosity. Unfortunately, they are difficult to identify in the rock record because of the lack of work done on modern analogues. San Salvador Island in the Bahamas hosts a well-exposed and easily accessible Holocene strand plain, ideal as a modern analogue. Sandy Hook, located on the southeast part of the island, consists of approximately 35 ridge-swale features that show signs of four distinct zones of deposition. In this study, 20 sediment samples were collected from one meter in depth, and throughout each zone. The sediment analysis reveals remarkably consistent grain-size distributions across the four zones. Carbon-14 ages were taken from the sediment samples. They revealed ages decreasing from 2617 ± 188 YBP to modern moving seaward through zone 4. The ages reveal depositional rates of 0.08 to 0.29 meters of accretion per year. Four pseudo-3D GPR surveys were acquired in Zones B, C, and D, and a 2D GPR survey was acquired that spanned the three zones. The pseudo-3D surveys revealed consistent reflectors through the width of the survey indicating that the 2D surveys represent more than the single line. The 2D survey reveals semi-parallel seaward-dipping reflectors (representing fair-weather deposits) that are truncated by sigmoidal seaward-dipping reflectors (high-energy storm deposits). Indicating that Sandy Hook was built through both fair-weather deposits and high-energy storm events.

No description available.

Ancylostoma caninum, un nématode parasite, présente une prévalence élevée chez les chiens dans le monde. L'ankylostomiase canine peut être diagnostiquée à l'aide de tests coprologiques qui détectent les œufs ressemblant à des ankylostomes, ainsi que la présence de symptômes tels que l'anémie et les selles noires. Ces dernières années, le nombre de rapports établissant une résistance aux anthelminthiques chez A. caninum aux États-Unis d’Amérique a considérablement augmenté. Cette tendance émergente a incité notre enquête sur la possibilité qu’un scénario similaire se produise au Canada. L'objectif de cette étude était d'étudier la survenue d'une infection à A. caninum chez un groupe de chiens de refuge au Québec ayant préalablement reçu un traitement anthelminthique. De plus, l'étude visait à évaluer l'établissement potentiel d'une résistance anthelminthique contre ce parasite en employant des approches modifiées pour détecter les infections à faible prévalence. La procédure d'examen a été réalisée dans deux groupes distincts : un groupe local et un groupe composé de trois chiens des États-Unis d'Amérique (groupe USA). Le test coprologique a été réalisé avant et après un traitement anthelminthique incluant les benzimidazoles. De plus, la présence d'A. caninum a été confirmée par une amplification PCR précise du gène ITS-2. Le groupe local a montré un effet thérapeutique significatif après avoir reçu du fenbendazole. L'identification d'une mutation hétérozygote au niveau du codon 167 du gène de l'isotype 1 de la β-tubuline dans le groupe américain a été réalisée par analyse moléculaire. Ainsi, en évaluant les résultats thérapeutiques du fenbendazole, nous pouvons confirmer son efficacité variable comme anthelminthique contre A. caninum. De plus, des preuves moléculaires indiquent la présence d'isolats résistants dans le pays, ce qui pourrait potentiellement constituer un défi important pour contrôler les nématodes gastro-intestinaux chez les animaux de compagnie / Ancylostoma caninum, a parasitic nematode, exhibits a high prevalence in dogs globally. Canine ancylostomiasis can be diagnosed using coprological tests that detect hookworm-like eggs, as well as the presence of symptoms such as anaemia and dark stool. In recent years, there has been a significant rise in the number of reports establishing anthelmintic resistance in A. caninum within the United States of America. This emerging trend has prompted our investigation on the possibility of a similar scenario occurring in Canada. The objective of this study was to investigate the occurrence of A. caninum infection in a group of shelter dogs in Quebec who had previously received anthelmintic treatment. Additionally, the study aimed to assess the potential establishment of anthelmintic resistance against this parasite by employing modified approaches to detect infections with a low prevalence. The examination procedure was carried out in two distinct groups: a native group and a group consisting of three dogs from the United States of America (USA group). The coprological test was undertaken both prior to and following anthelmintic treatment, which included the benzimidazoles. Moreover, A. caninum presence was confirmed via precise PCR amplification of the ITS-2 gene. The native group showed a significant treatment effect after receiving fenbendazole. The identification of a heterozygous mutation at codon 167 on the β-tubulin isotype-1 gene in the USA group was achieved through molecular analysis. Thus, by assessing the therapeutic outcomes of fenbendazole, we can confirm its varying effectiveness as an anthelmintic against A. caninum. Additionally, molecular evidence indicates the presence of resistant isolates in the country, which could potentially pose a significant challenge for controlling gastrointestinal nematodes in companion animals.

Wearable technology has attracted global attention in the last decade and the market is experiencing an unprecedented growth. Wearable devices are designed to be low-profile, light-weight and integrated seamlessly into daily life. Comfort is one of the most important requirements for wearable devices. Fabric based antennas are soft, flexible and can be integrated into clothing. State of the art textile manufacturing techniques such as embroidery, combined with advanced conductive textile materials can be used to fabricate flexible fabric based on-body antennas. In this thesis, the feasibility of using computerised embroidery in the fabrication of wearable, flexible yet functional fabric based antennas have been examined. The fabric based antennas are embroidered using conductive threads. The most suitable materials for fabricating embroidered antennas have been identified. The embroidered fabric based antenna systems including transmission lines and low-profile detachable connectors have been fabricated and their RF performances have been tested. The optimal manufacturing parameters related to embroidery such as stitch direction, spacing and length have been examined. The repeatability of embroidered antennas, cost estimation, and complexity of manufacturing process have been clearly presented. The results can be used to inform and provide guidelines for the development of representative products that can be mass manufactured. A new simulation approach has been introduced to analyse the anisotropic properties of embroidered conductive threads. Simulations and measurements indicate that the performances of embroidered antennas are affected by the anisotropic surface current due to the embroidered stitches. Exploiting the current direction, a novel non-uniform meshed patch antenna has been designed. Representative results show that the non-uniform meshed structure can significantly reduce more than 75% of the usage of conductive materials for the microstrip antennas with negligible effect on the antenna performance.

This thesis deals with the design of a container carrier with interchangeable superstructures up to 3000 kg of technical weight. The introduction renders a critical review of similar devices and consecutive review of the device in terms of legislative matters. A dynamic simulation was used to calculate the loaded states. The outcome of the simulation was used to set the border conditions, which were then used for strength analysis calculations using finite element method (FEM). Blueprints of the final design are a part of the thesis.

In 2010 Chung-Graham-Knuth proved an interesting symmetric identity for the Eulerian numbers and asked for a q-analog version. Using the q-Eulerian polynomials introduced by Shareshian-Wachs we find such a q-identity. Moreover, we provide a bijective proof that we further generalize to prove other symmetric qidentities using a combinatorial model due to Foata-Han. Meanwhile, Hyatt has introduced the colored Eulerian quasisymmetric functions to study the joint distribution of the excedance number and major index on colored permutations. Using the Decrease Value Theorem of Foata-Han we give a new proof of his main generating function formula for the colored Eulerian quasisymmetric functions. Furthermore, certain symmetric q-Eulerian identities are generalized and expressed as identities involving the colored Eulerian quasisymmetric functions. Next, generalizing the recent works of Savage-Visontai and Beck-Braun we investigate some q-descent polynomials of general signed multipermutations. The factorial and multivariate generating functions for these q-descent polynomials are obtained and the real rootedness results of some of these polynomials are given. Finally, we study the diagonal generating function of the Jacobi-Stirling numbers of the second kind by generalizing the analogous results for the Stirling and Legendre-Stirling numbers of the second kind. It turns out that the generating function is a rational function, whose numerator is a polynomial with nonnegative integral coefficients. By applying Stanley's theory of P-partitions we find combinatorial interpretations of those coefficients

Made available in DSpace on 2015-04-20T12:31:14Z (GMT). No. of bitstreams: 1 francisco.pdf: 1029822 bytes, checksum: a55ebb42d97e615744cc7460ffefa1d1 (MD5) Previous issue date: 2011-03-24 / Caferana Picrolemma sprucei Hook a plant from the Simarubaceae family with antimalarial effects well known by the Amazon region native populations is being used without any criteria by them as a medicinal tea in order to fight this disease. The plant has a taproot that could reach over 2mts depth. On chapter one, it has been researched the regrowing of the species in its own habitat, in order to evaluate the increment of vegetal material, in a given period of four years to attain technical information on cultivated stuff and a sprout production method. The selected part of plant was the stem in natural habitat, close-cut regrowing at ground-surface. The population had 75% of plants with average height of 50 cm. On following four years, after being cut to measure average height, 75 % of plants have reached maximum height between 28 to 30cm. As a main conclusion, it could be inferred that, according field observation the caferana plant needs at least the minimum of four years to recompose its growth after being cut. It has been observed a rather slow regrowth increment, because unknown factors. On chapter two, it has been used the agronomic stake technique aiming at to evaluate plant viability for sprout production. It was adopted a casual design experiment absolutely at random in factorial scheme 4 x 4 with four types of stakes ligneous, semi-ligneous, herbaceous and semi-herbaceous and four types of soil; S1 with sand 100%, S2 with 50% sand plus 50% clay, S3 with clay 100%, and S4 with composite soil 30% plus 30% clay plus 40% sand. Best kind of soil for caferana has been S4 composite 21,67%, and best stakes were: ligneous 29,16% and herbaceous 20%. On a general mood, roots were only established after one and a half year of sprout maintenance, turning rather difficult its identification, diminishing sprout development, making non-feasible the stake-technique for sprout production. On chapter three, it has been evaluated caferana plants sprouting with seeds collected at UFAM-AM. The experiment was sketched in blocks at random, with four types of soils; S1 (100% sand); S2 (50% sand plus 50% clay); S3 (100% clay) S4 (30% composite plus 30% clay plus 40% sand), during four years. At the green-house caferana has been watered with automatic sprinkling every ten minutes at 60 second - irrigating period. The largest percentage sprouting average was with substratum S4 (41.02%) followed by S3 (31.92%) and S2 (30,29%) which do not differed between them. The worst performance has been for substratum S1 (22,94%). Germination techniques in green-house, for Picrolemma spruce Hook sprout production has had a rather medium yield. It has been concluded that there is a great dependence on moisture for this species germination, already proved by best treatments (S4, S3, S2), containing (clay and humus) moisture retaining particles, which was also verified in its habitat next to Igarapes (creeks), where they develop in larger quantities. It is highly recommended to test other sprout production techniques, as in B.O.D chambers where could prove better results than in soil substrata germination. On chapter four, it has been evaluated the analysis by genetic markers conducted by three different combinations of four EcoRI-Msel starters, resulting in a total number of 443 polymorphic bands. These data has been used for the analysis of genetic divergence among populations. It was observed low-levels of genetic divergence among them. Genetic similarity at must has been of 88.8% inside C population, 39% inside D population, being similar inside P population, indicating, and lower genetic variability on C population, then influenced to endogamy crossing. Clustering populations has being displayed in the form of a dendrogram; inferring that, populations with greater Jaccard coefficient tend to have more similarity, and trees next to each other tend to be more similar among them. / Atualmente, há um grande interesse em plantas para extração de princípios ativos com atividade antimalárica, principalmente na Amazônia, onde a doença já se alastra há tempos, sem uma ação eficaz para sua erradicação. A Caferana (Picrolemma sprucei Hook. f.) é uma planta Simaroubaceae, conhecida como antimalárica por povos nativos da região Amazônica, sendo utilizada sem critérios como chá medicinal para combate à doença. A planta possui uma raiz pivotante e atinge em torno de 2 m de profundidade. No capítulo I, foi investigado o recrescimento da espécie em seu habitat, a fim de avaliar o incremento do material vegetal, num período de quatro anos, para obter informações sobre recrescimento do material selvagem e o melhor método de produção de mudas. A planta foi cortada no caule (corte rente à superfície do solo) em seu habitat natural. A população original apresentava 75% das plantas com altura média de 50 cm. Nos quatro anos seguintes, o recrescimento médio de 75% das plantas atingiu a altura de (28 a 30 cm). Concluiu-se que a planta necessita, conforme observações em campo, não menos que quatro anos para se recompor em recrescimento depois de cortada. Tendo um incremento de recrescimento lento e com grande variabilidade, devido a fatores desconhecidos. No capítulo II, utilizou-se a técnica agronômica de estaquia a fim de avaliar a viabilidade na propagação da planta nativa para produção de mudas. Adotou-se experimento em delineamento inteiramente ao acaso em esquema fatorial (4X4) com quatro tipos de estacas (lenhosa, semi-lenhosa, herbácea e semi-herbácea) e quatro tipos de substratos: (S1) com areia (100%); (S2) com 50% de areia + 50% de solo argiloso; (S3), com solo argiloso (100%); e (S4) com 30% de terra compostada + 30% de solo argiloso + 40% de areia). O melhor substrato para caferana foi o compostado S4 (21,67%), e as melhores estacas foram: lenhosa (29,16%) e herbácea (20%). De um modo geral, as raízes só apareceram após um ano e meio de manutenção da muda, tornando difícil sua identificação, diminuindo o desenvolvimento da muda e inviabilizando a técnica de estaquia para produção das mudas nativas. No capítulo III, avaliou-se a germinação de plantas de caferana com sementes coletadas na UFAM/AM. O experimento foi delineado em blocos ao acaso, com quatro tipos de substratos: S1 (100% areia); S2 (50% areia + 50% solo argiloso); S3 (100% solo argiloso) e S4 (30% composto + 30% solo argiloso + 40% areia). Na casa de vegetação regou-se com aspersão automática a cada 10 min., com período de rega de 60s. A maior percentagem média de germinação foi com o substrato S4 (41,02%) seguido de S3 (31,92%) e S2 (30,29%) que não diferiram entre si. Obtendo o pior desempenho o substrato S1 (22,94%). A técnica de germinação em casa de vegetação para produção de mudas da espécie Picrolemma sprucei, apresentou um rendimento apenas mediano. Conclui-se que há dependência de umidade para germinação da espécie, provada pela composição dos melhores tratamentos S4, S3 e S2, contendo partículas redutoras de argila e húmus, grande retentora de água, e, também verificada em seu habitat, próximas aos igarapés, se desenvolvem em maior quantidade. Recomenda-se testar outras técnicas de produção de mudas, em câmaras de BOD, onde poderá demonstrar melhores resultados do que a germinação em substratos de solo. Com relação ao experimento com marcador molecular AFLP, capítulo IV, obteve-se um índice de similaridade genética máxima em torno de 29% para a população P (ZF2), 33% para apopulação D (Ducke) e o maior índice em torno de 87% para a população C (cultivada), mostrando definitivamente a baixa variabilidade genética em populações cultivadas, possivelmente devido ao endocruzamento. A análise por marcador genético foi realizada por sete diferentes combinações de iniciadores EcoRI-MseI, resultando num total de 443 bandas polimórficas. Esses dados foram utilizados para análise da divergência genética entre populações e dentro delas. Foram detectados baixos níveis de divergência genética entre populações. O máximo de similaridade genética foi de 88,8%, dentro de população C , o de 39% dentro da população D e semelhante dentro da P (39%), indicando uma menor variabilidade genética na população C que ficou sujeita a cruzamentos endogâmicos. O agrupamento das populações, a partir do dendrograma (Apêndice I) encontrado, sugere que populações com maior coeficiente de JACCARD, tenham maior similaridade e árvores próximas tendem a ser mais similar entre si.