Adapted random perturbations for non-uniformly expanding maps

We obtain stochastic stability of C2 non-uniformly expanding one-dimensional endomorphisms, requiring only that the first hyperbolic time map be L^{p}-integrable for p>3. We show that, under this condition (which depends only on the unperturbed dynamics), we can construct a random perturbation that preserves the original hyperbolic times of the unperturbed map and, therefore, to obtain non-uniform expansion for random orbits. This ensures that the first hyperbolic time map is uniformly integrable for all small enough noise levels, which is known to imply stochastic stability. The method enables us to obtain stochastic stability for a class of maps with infinitely many critical points. For higher dimensional endomorphisms, a similar result is obtained, but under stronger assumptions.Comment: 25 pages; 1 figure; many typos corrected. Keywords: stochastic stability, additive perturbation, non-uniform expansion, slow recurrence, adapted random perturbation, stationary measures, physical measures, first hyperbolic time map. To be published in Stochastics and Dynamic

From identical S- and P-wave pT/M spectra to maximally distinct polarizations: probing NRQCD with chi states

A global analysis of ATLAS and CMS measurements reveals that, at mid-rapidity, the directly-produced $\chi_{c1}$, $\chi_{c2}$ and J/$\psi$ mesons have differential cross sections of seemingly identical shapes, when presented as a function of the mass-rescaled transverse momentum, $p_{\rm T}/M$. This identity of kinematic behaviours among S- and P-wave quarkonia is certainly not a natural expectation of non-relativistic QCD (NRQCD), where each quarkonium state is supposed to reflect a specific family of elementary production processes, of significantly different $p_{\rm T}$-differential cross sections. Remarkably, accurate kinematic cancellations among the variegated NRQCD terms (colour singlets and octets) of its factorization expansion can lead to a surprisingly good description of the data. This peculiar tuning of the NRQCD mixtures leads to a clear prediction regarding the $\chi_{c1}$ and $\chi_{c2}$ polarizations, the only observables not yet measured: they should be almost maximally different from one another, and from the J/$\psi$ polarization, a striking exception in the global panorama of quarkonium production. Measurements of the difference between the $\chi_{c1}$, $\chi_{c2}$ and J/$\psi$ polarizations, complementing the observed identity of momentum dependences, represent a decisive probe of NRQCD.Comment: Submitted to European Physical Journal

The Graphicahedron

The paper describes a construction of abstract polytopes from Cayley graphs of symmetric groups. Given any connected graph G with p vertices and q edges, we associate with G a Cayley graph of the symmetric group S_p and then construct a vertex-transitive simple polytope of rank q, called the graphicahedron, whose 1-skeleton (edge graph) is the Cayley graph. The graphicahedron of a graph G is a generalization of the well-known permutahedron; the latter is obtained when the graph is a path. We also discuss symmetry properties of the graphicahedron and determine its structure when G is small.Comment: 21 pages (European Journal of Combinatorics, to appear

Asymmetric microbial reduction of ketones: absolute configuration of trans-4-ethyl-1-(1S-hydroxyethyl)cyclohexanol

A set of five fungal species, Botrytis cinerea, Trichoderma viride and Eutypa lata, and the endophytic fungi Colletotrichum crassipes and Xylaria sp., was used in screening for microbial biocatalysts to detect monooxygenase and alcohol dehydrogenase activities (for the stereoselective reduction of carbonyl compounds). 4-Ethylcyclohexanone and acetophenone were biotransformed by the fungal set. The main reaction pathways involved reduction and hydroxylations at several positions including tertiary carbons. B. cinerea was very effective in the bioreduction of both substrates leading to the chiral alcohol (S)-1- phenylethanol in up to 90% enantiomeric excess, and the cis–trans ratio for 4-ethylcyclohexanol was 0:100. trans-4-Ethyl-1-(1S-hydroxyethyl)cyclohexanol, obtained from biotransformation by means of an acyloin-type reaction, is reported here for the first time. The absolute configurations of the compounds trans-4-ethyl-1-(1S-hydroxyethyl)cyclohexanol and 4-(1S- and 4-(1R-hydroxyethyl)cyclohexanone were determined by NMR analysis of the corresponding Mosher’s esters

Maternidade transnacional: o exercício da maternidade por mulheres que imigraram sem os filhos

O presente projeto pretende fazer um estudo teórico e empírico sobre as mulheres que imigram; geralmente de países pobres ou em desenvolvimento para países ricos e desenvolvidos, em busca de melhores condições de vida; e deixam para trás os filhos, muitas vezes com menos de um ano de idade, por longos períodos de tempo. O estudo, no entanto deixará um pouco de lado os impactos financeiros do fenômeno migratório e das relações transnacionais e se focará mais nestas pessoas e nas consequências de ordem social sobre as mesmas, especialmente as mães imigrantes, nomeadamente os efeitos sobre a subjetividade e o bem-estar, as relações interpessoais e os comportamentos e práticas de um modo geral.This project aims to make a theoretical and empirical study about women who immigrate, generally from poor or developing countries to rich and developed countries in search of better living conditions, and leave behind their children, often with less than one year of age for long periods of time. The study, nevertheless leave a little aside the financial impacts of the migratory phenomenon and the transnational relations and will focus more on these people and the social order’s consequences on them, especially the immigrant mothers, including the effects on subjectivity and well-being, interpersonal relationships and behaviors and practices in a general way

A efetividade jurídica brasileira da proteção de dados não divulgados e suas implicações no setor da indústria farmacêutica

Este trabalho analisa a controvérsia do atual regime de proteção de informações confidenciais, que são confiados ás agências reguladoras governamentais, a fim de obter a aprovação de comercialização dos medicamentos para uso humano. Nesta área, encontram-se, claramente, os direitos de propriedade e desenvolvimento tecnológico em confronto com o direito de acesso da população a medicamentos de baixo custo. Analisa-se também o regime nacional de medicamentos genéricos e similares, tendo em vista a atual política adotada pelo governo brasileiro para o desenvolvimento desses medicamentos

Purificaçao e caracterizaçao da proteína GInZ de Azospirillum brasilense

Orientador : Leda Satie ChubastsuCo-orientadora : Fábio de Oliveira PedrosaDissertaçao (mestrado) - Universidade Federal do Paraná, Setor de Ciencias BiológicasResumo disponível somente no PDF por conter caracteres especiais, fórmulas, equações, diagramas, entre outro

Toranja, O Jogo : experiências com um Objeto de Aprendizagem no ensino das Artes Visuais na Educação Básica

Monografia (graduação)—Universidade de Brasília, Instituto de Artes, Departamento de Artes Visuais, 2014.O presente trabalho investiga a cerca das potencialidades e experiências que podem surgir a partir do uso de um Objeto de Aprendizagem nas aulas de Artes Visuais, e um OA foi desenvolvido e aplicado em grupos focais para este fim. O objetivo desta pesquisa é investigar sobre os benefícios e desafios que este recurso poderia trazer para o âmbito das aulas de Artes Visuais. Conceitualmente, são aqui exploradas as idéias de Johan Huizinga acerca do Homo ludens, de John Dewey e a arte como experiência, bem como o trabalho de artistas contemporâneos que dialoguem com estas propostas, como o grupo Fluxus e os neoconcretos Lygia Clark e Helio Oiticica. Esta pesquisa é de caráter qualitativo, com análise da experiência de três grupos focais, entrevistas, questionários estruturados e observações in loco. _____________________________________________________________________________ ABSTRACTThis study investigates about the potentials and experiences that may arise from the use of a Learning Object in Visual Arts classes, and a LO was developed and applied in focus groups for this purpose. The objective of this research is to investigate the benefits and challenges that this feature could bring to the scope of Visual Arts classes. Conceptually, here are explored Johan Huizinga's ideas about Homo ludens, John Dewey and the art as experience, as well as the work of contemporary artists that communicate with these proposals, as the Fluxus group and the neoconcrete artists Lygia Clark and Helio Oiticica. This research is qualitative, with analysis of the experience of three focus groups, interviews, structured questionnaires and on-site observations