On the Integrability and Chaos of an N=2 Maxwell-Chern-Simons-Higgs Mechanical Model

We apply different integrability analysis procedures to a reduced (spatially homogeneous) mechanical system derived from an off-shell non-minimally coupled N=2 Maxwell-Chern-Simons-Higgs model that presents BPS topological vortex excitations, numerically obtained with an ansatz adopted in a special - critical coupling - parametric regime. As a counterpart of the regularity associated to the static soliton-like solution, we investigate the possibility of chaotic dynamics in the evolution of the spatially homogeneous reduced system, descendant from the full N=2 model under consideration. The originally rich content of symmetries and interactions, N=2 susy and non-minimal coupling, singles out the proposed model as an interesting framework for the investigation of the role played by (super-)symmetries and parametric domains in the triggering/control of chaotic behavior in gauge systems. After writing down effective Lagrangian and Hamiltonian functions, and establishing the corresponding canonical Hamilton equations, we apply global integrability Noether point symmetries and Painleveproperty criteria to both the general and the critical coupling regimes. As a non-integrable character is detected by the pair of analytical criteria applied, we perform suitable numerical simulations, as we seek for chaotic patterns in the system evolution. Finally, we present some Comments on the results and perspectives for further investigations and forthcoming communications.Comment: 18 pages, 5 figure

Immunolocalization of steroidogenic enzymes in the vaginal mucous of Galea spixii during the estrous cycle.

BackgroundThe synthesis of sex steroids is controlled by several enzymes such as17α-hydroxylase cytochrome P450 (P450c17) catalyzing androgen synthesis and aromatase cytochrome P450 (P450arom) catalyzing estrogen synthesis, both of which must complex with the redox partner NADPH-cytochrome P450 oxidoreductase (CPR) for activity. Previous studies have identified expression of steroidogenic enzymes in vaginal tissue, suggesting local sex steroid synthesis. The current studies investigate P450c17, P450aromatase and CPR expression in vaginal mucosa of Galea spixii (Spix cavy) by immuno-histochemical and western immunoblot analyses.MethodsStages of estrous cyclicity were monitored by vaginal exfoliative cytology. After euthanasia, vaginal tissues were retrieved, fixed and frozen at diestrus, proestrus, estrus and metestrus. The ovaries and testis were used as positive control tissues for immunohistochemistry.ResultsData from cytological study allowed identification of different estrous cycle phases. Immunohistochemical analysis showed different sites of expression of steroidogenic enzymes along with tissue response throughout different phases of the estrous cycle. However, further studies are needed to characterize the derived hormones synthesized by, and the enzymes activities associated with, vaginal tissues.ConclusionCurrent results not only support the expression of enzymes involved in sex steroid synthesis in the wall of the vagina, they also indicate that expression changes with the stage of the cycle, both the levels and types of cells exhibiting expression. Thus, changes in proliferation of vaginal epithelial cells and the differentiation of the mucosa may be influenced by local steroid synthesis as well as circulating androgens and estrogens

The 12 prophets dataset

The "Ajeijadinho 3D" project is an initiative supported by the University of S\~ao Paulo (Museum of Science and Dean of Culture and Extension), which involves the 3D digitization of art works of Brazilian sculptor Antonio Francisco Lisboa, better known as Aleijadinho. The project made use of advanced acquisition and processing of 3D meshes for preservation and dissemination of the cultural heritage. The dissemination occurs through a Web portal, so that the population has the opportunity to meet the art works in detail using 3D visualization and interaction. The portal address is http://www.aleijadinho3d.icmc.usp.br. The 3D acquisitions were conducted over a week at the end of July 2013 in the cities of Ouro Preto, MG, Brazil and Congonhas do Campo, MG, Brazil. The scanning was done with a special equipment supplied by company Leica Geosystems, which allowed the work to take place at distances between 10 and 30 meters, defining a non-invasive procedure, simplified logistics, and without the need for preparation or isolation of the sites. In Ouro Preto, we digitized the churches of Francisco of Assis, Our Lady of Carmo, and Our Lady of Mercy; in Congonhas do Campo we scanned the entire Sanctuary of Bom Jesus de Matosinhos and his 12 prophets. Once scanned, the art works went through a long process of preparation, which required careful handling of meshes done by experts from the University of S\~ao Paulo in partnership with company Imprimate.Comment: Full dataset online at http://aleijadinho3d.icmc.usp.br/data.htm

Caracterizacao dos frutos de goiabeira e selecao de cultivares na regiao do Submedio Sao Francisco.

O estudo visou a caracterizar frutos de goiabeira e selecionar cultivares produzidas na regiao do Submedio Sao Francisco. Os frutos, colhidos na maturidade fisiologica, foram provenientes da estacao Experimental de Bebedouro, pertencente a Embrapa Semi-Arido e avaliados em delineamento experimental inteiramente casualizado com quatro repeticoes. Os tratamentos compreenderam genotipos de polpa branca (Alabama Safed, Lucknow 49, Banahas, White Selection of Florida e Selecao IPA B 38.1) e vermelha (Paluma, Patillo 2.1, Surubim, Red Selection of Florida e Selecao IPA B 14.3). Avaliaram-se: massa, diametro longitudinal (DL), diametro transversal (DT), relacao DL/DT, espessura da casca, espessura da polpa, solidos soluveis totais (SST), acidez total titulavel (ATT), relacao SST/ATT, pH, acucares soluveis totais (AST) e vitamina C. Os genotipos de polpa branca, exceto Selecao IPA B 38.1, tiveram maiores massas (acima de 145,0g). As menores relacoes DL/DT foram observadas e Banahas (0,98) e Lucknow 49 (1,00), caracterizando frutos redondos. Estas cultivares tiveram tambem maior espessura da polpa. Os maiores valores de SST foram observados em Paluma (10,4 oBrix) e Lucknow 49 (10,9 oBrix). A ATT foi baixa na maioria dos genotipos, exceto Surubim e Selecao IPA B 14,3, e o pH variou de 3,72 a 4,22. Em geral, os genotipos de polpa branca tiveram os maiores teores de AST (5 a 7%) e vitamina C, atingindo 200 mg de acido ascorbico/100g

Produção científica da Embrapa Instrumentação Agropecuária (1985-2002): livros, capítulos de livros e artigos em periódicos.

Introdução; Lista de publicações; Periódicos; Livros; Capítulo de livros.bitstream/CNPDIA/8114/1/DOC03_2002.pd

Teses e dissertações orientadas pela Embrapa Instrumentação Agropecuária em 2002.

Desenvolvimento de materiais para aplicação em sensores gustativos de cafés; Um novo método para medidas de gotas de chuva com técnicas do processamento digital de imagens; Utilização de tomografia por ressonância magnética nuclear para sexagem de aves silvestres sem dimorfismo sexual; Estudo de filmes poliméricos ultrafinos de polianilinas para aplicação em sensores; Fabricação de elementos vítreos porosos para depósito de polímeros visando a obtenção de membranas com superfícies ativas; Caracterização de Xanthomonas axonopodis pv. citri e Xylella fastidiosa e seus processos metabólicos por RMN, FTIR e EPR; Desenvolvimento de compósitos de resina fenólica reforçados por tecidos hídricos juta/algodão; Estudos espectroscópicos e cromatográficos de substâncias húmicas de solos sob diferentes sistemas de preparo; Preparação e caracterização de compósitos poliméricos de polipropileno e fibras de sisal benziladas em diferentes condições; Caracterização de forças de adesão em materiais utilizando a microscopia de força atômica; Caracterização de sítios hidrofóbicos em substâncias húmicas e interações com pesticidas determinados por espectroscopia, microscopia e polarografia; Sistema para tomada de decisão sobre zonas de risco agroclimático com técnicas do processamento de imagens digitais; Medidas lineares e classificação em bovinos com técnicas do processamento de imagens digitais; Caracterização e utilização de filmes ultrafinos poliméricos em sistemas líquidos através da técnica de reflectometria no domínio do tempo; Método complementar de análise da qualidade de madeira com técnicas do processamento digital de imagens

Self-Interacting Electromagnetic Fields and a Classical Discussion on the Stability of the Electric Charge

The present work proposes a discussion on the self-energy of charged particles in the framework of nonlinear electrodynamics. We seek magnet- ically stable solutions generated by purely electric charges whose electric and magnetic fields are computed as solutions to the Born-Infeld equa- tions. The approach yields rich internal structures that can be described in terms of the physical fields with explicit analytic solutions. This suggests that the anomalous field probably originates from a magnetic excitation in the vacuum due to the presence of the very intense electric field. In addition, the magnetic contribution has been found to exert a negative pressure on the charge. This, in turn, balances the electric repulsion, in such a way that the self-interaction of the field appears as a simple and natural classical mechanism that is able to account for the stability of the electron charge.Comment: 8 pages, 1 figur

Rare earth element and yttrium geochemistry applied to the genetic study of cryolite ore at the Pitinga Mine (Amazon, Brazil)

This work aims at the geochemical study of Pitinga cryolite mineralization through REE and Y analyses in disseminated and massive cryolite ore deposits, as well as in fluorite occurrences. REE signatures in fluorite and cryolite are similar to those in the Madeira albite granite. The highest ΣREE values are found in magmatic cryolite (677 to 1345 ppm); ΣREE is lower in massive cryolite. Average values for the different cryolite types are 10.3 ppm, 6.66 ppm and 8.38 ppm (for nucleated, caramel and white types, respectively). Disseminated fluorite displays higher ΣREE values (1708 and 1526ppm) than fluorite in late veins(34.81ppm). Yttrium concentration is higher in disseminated fluorite and in magmatic cryolite. The evolution of several parameters (REEtotal, LREE/HREE, Y) was followed throughout successive stages of evolution in albite granites and associated mineralization. At the end of the process, late cryolite was formed with low REEtotal content. REE data indicate that the MCD was formed by, and the disseminated ore enriched by (additional formation of hydrothermal disseminated cryolite), hydrothermal fluids, residual from albite granite. The presence of tetrads is poorly defined, although nucleated, caramel and white cryolite types show evidence for tetrad effect.Este trabalho enfoca a geoquímica de elementos terras raras (ETR) e de Y no minério criolítico disseminado, no depósito criolítico maciço e na fluorita associada na mina Pitinga. As assinaturas de ETR na criolita e fluorita são similares àquelas do granito Madeira. Os maiores valores de SETR são encontrados na criolita magmática disseminada (677 a 1.345 ppm); SETR é menor na criolita maciça, com valores médios de 10,3 ppm, 6,66 ppm e 8,38 ppm, respectivamente, nos tipos de criolita nucleada, caramelo e branca. A fluorita magmática disseminada apresenta os valores mais altos de SETR (1.708 e 1.526 ppm), contrastando com a fluorita de veio tardio(34,81 ppm). A concentração de Y é maior na fluorita disseminada e na criolita magmática. As evoluções de diversos parâmetros (SETR, ETRL/ETRP, Y) podem ser seguidas através dos sucessivos estágios de evolução dos albita granitos e mineralização associada. Os dados de ETR indicam que o depósito criolítico maciço foi formado por, e o minério disseminado enriquecido por (formação adicional criolita disseminada hidrotermal), fluidos hidrotermais residuais do albita granito. A presença do efeito tetrad não é bem definida, embora as criolitas maciças nucleada, caramelo e branca apresentem algumas evidências deste efeito.FINEPAgência para o Desenvolvimento da Indústria Mineral do BrasilConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) - Departamento Nacional de Produção MineralFundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS) - Programa de Apoio a Núcleos de ExcelênciaCNP