Dinâmica secular rotacional de corpos tri-axiais: expansão de V em ressonâncias de primeira ordem

Consider a finite body of mass m (C1) with moments of inertia A, B and C. This body orbits another one of mass much larger M (C2), which at first will be taken as a point, even if it is not completely spherical. The body C1, when orbit C2, performs a translational motion near a Keplerian. It will not be a Keplerian due to external disturbances. We will use two axes systems: fixed in the center of mass of C1 and other inertial. The C1 attitude, that is, the dynamic rotation of this body is know if we know how to situate mobile system according to inertial axes system. The strong influence exerted by C2 on C1, which is a flattened body, generates torques on C1, what affects its dynamics of rotation. We will obtain the mathematical formulation of this problem assuming C1 as a planet and C2 as the sun. Also applies to case of satellite and planet. In the case of Mercury-Sun system, the disturbing potential that governs rotation dynamics, for theoretical studies, necessarily have to be developed by powers of the eccentricity. As is known, such expansions are delicate because of the convergence issue. Thus, we intend to make a development until the third order (superior orders are not always achievable because of the volume of terms generated in cases of first-order resonances). By defining a modern set of canonical variables (Andoyer), we will assemble a disturbed Hamiltonian problem. The Andoyer's Variables allow to define averages, which enable us to discard short-term effects. Our results for the resonant angle variation of Mercury are in full agreement with those obtained by D'Hoedt & Lemaître (2004) and Rambaux & Bois (2004)

Eco postal: um programa socioambiental com gera????o de emprego e renda

Na Empresa Brasileira de Correios e Tel??grafos (ECT), um grande n??mero de empregados recebe uniformes com periodicidade semestral, o que inclui tamb??m a troca peri??dica dos malotes inutilizados pelo desgaste. Por quest??es de seguran??a, todo esse material inserv??vel era destinado ao aterro sanit??rio. Mas, desde 2004, foi encontrado um novo destino para esses objetos a partir das cooperativas formadas em conv??nio com a Universidade Federal do Paran??, Associa????o Comercial do munic??pio de Toledo e Organiza????es N??o-Governamentais (ONGs). As cooperativas transformam artesanalmente esse material em v??rios produtos que geram emprego e renda, especialmente para as fam??lias que, em muitas situa????es, viviam do subemprego. Isso demonstra a import??ncia que a empresa confere ??s a????es de responsabilidade social que ultrapassam a oferta de servi??os com qualidade ?? comunidade, assegurando que todo o processo de trabalho seja feito de forma socialmente respons??vel. Este programa gera emprego e renda para aproximadamente 50 fam??lias em todo o estado, com projeto de amplia????o para outras regi??es

Sistema de Gest??o da Gera????o Interligada da Superintend??ncia de Gera????o Hidr??ulica (OGH): Modelo de Excel??ncia da Gest??o (MEG) Integrado ?? Manuten????o Produtiva Total (TPM)

Com os crescentes n??veis de competitividade do mercado, ?? preciso inovar no modelo organizacional. Para isso, a Superintend??ncia de Gera????o Hidr??ulica, uma unidade aut??noma da Eletrobras Eletronorte que tem como seu principal produto a energia el??trica produzida hidraulicamente, visando a se manter competitiva, inovou no seu modelo de gest??o, por meio da integra????o de duas metodologias; Modelo de Excel??ncia da Gest??o (MEG), da Funda????o Nacional da Qualidade, e a Manuten????o Produtiva Total (TPM), da Japan Institute of Plant Maintenance (JIPM). Este trabalho tem como objetivo apresentar a integra????o das metodologias, que visou a fortalecer a gest??o da organiza????o e com isso melhorar o seu desempenho. Com a implementa????o do Novo Sistema de Gest??o da Gera????o Interligada, foi poss??vel notar uma melhoria significativa no sistema de gest??o da empresa, evidenciada pelos resultados alcan??ados

Avalia????o de pol??ticas de financiamento a micro e pequenas empresas na gera????o de postos de trabalho: o caso do Proger ??? principais aspectos

O artigo se prop??e a apresentar os principais aspectos e resultados de uma nova metodologia de avalia????o de programas de financiamento a micro e pequenas empresas aplicada ao Programa de Gera????o de Emprego e Renda na ??rea urbana ??? Proger urbano, tanto no que se refere aos seus custos efetivos, at?? ent??o desconhecidos, quanto no que se refere ao seu impacto sobre a gera????o de empregos, estimado utilizando dados prim??rios oriundos do cruzamento de dois bancos de dados do Minist??rio do Trabalho e Emprego, quais sejam, o do Sistema de Acompanhamento da Execu????o do Proger (Saep), e o do Cadastro Geral de Empregados e Desempregados. S??o apresentados, preliminarmente, alguns dos resultados de duas avalia????es anteriores do programa, uma realizada pelo Ibase, atrav??s de question??rios aos benefici??rios do programa, e outra, uma primeira experi??ncia de cruzamento dos dois referidos bancos de dados, que serviu de base para a avalia????o que se apresenta.

E-service em bibliotecas: gera ao de valor para pesquisadores por meio de coopera ao indireta

O conceito de cooperação indireta aplicado a dados de transações de empréstimos do acervo de uma biblioteca pode ser usado para gerar recomendações de itens relevantes para usuários e pesquisadores. O modelo proposto utiliza a Análise de Agrupamentos e a Análise de Cestas e tem aplicabilidade direta em livrarias virtuais, podendo ser adaptado a praticamente qualquer tipo de empreendimento em e-business.

A competição eleitoral gera governos mais eficientes? Um estudo comparado das prefeituras no Brasil

Quão eficientes são os governos municipais brasileiros? Quais os efeitos da dinâmica política, sobretudo da competição eleitoral, sobre o seu desempenho? Para responder essas questões, este artigo tem por objetivo analisar os determinantes do desempenho dessas unidades governamentais, mensurados por indicadores de eficiência relativa nas áreas de educação, saúde e assistência social - formulados a partir do método de análise envoltória de dados. As premissas teóricas que fundamentam as hipóteses desta pesquisa remontam ao debate acerca da importância da política em relação aos resultados governamentais. Aplica-se regressão espacial para testar como fatores estruturais e, principalmente, políticos impactam o desempenho das prefeituras. Os resultados sugerem que a dimensão política explica parte do desempenho das prefeituras, apesar de a competição eleitoral não influenciar a eficiência governamental.

Copper, nickel and zinc removal by peanut hulls: batch and column studies in mono, tri-component systems and with real effluent

The main goal of this research study was the removal of Cu(II), Ni(II) and Zn(II) from aqueous solutions using peanut hulls. This work was mainly focused on the following aspects: chemical characterization of the biosorbent, kinetic studies, study of the pH influence in mono-component systems, equilibrium isotherms and column studies, both in mono and tri-component systems, and with a real industrial effluent from the electroplating industry. The chemical characterization of peanut hulls showed a high cellulose (44.8%) and lignin (36.1%) content, which favours biosorption of metal cations. The kinetic studies performed indicate that most of the sorption occurs in the first 30 min for all systems. In general, a pseudo-second order kinetics was followed, both in mono and tri-component systems. The equilibrium isotherms were better described by Freundlich model in all systems. Peanut hulls showed higher affinity for copper than for nickel and zinc when they are both present. The pH value between 5 and 6 was the most favourable for all systems. The sorbent capacity in column was 0.028 and 0.025 mmol g-1 for copper, respectively in mono and tri-component systems. A decrease of capacity for copper (50%) was observed when dealing with the real effluent. The Yoon-Nelson, Thomas and Yan’s models were fitted to the experimental data, being the latter the best fit.

Silver coordination polymers with tri- and hexacyanoethyl-functionalized macrocyclic ligands

Tri-and hexa-cyanoethyl functionalized 17-(L-1) and 42-membered (L-2) macrocyclic compounds were obtained by [1 + 1] (for L-1) or [2 + 2] (for L-2) cyclocondensation of the corresponding dialdehyde and diethylenetriamine, followed by hydrogenation by KBH4 and subsequent cyano-functionalization with acrylonitrile. They react with silver nitrate, leading to the formation of [AgL1](NO3) (1) and of the metalorganic coordination polymers [Ag-2(NO3)(2)L-1](n) (2) and {[Ag2L2](NO3)(2)}(n) (3). The complexes were characterized by elemental analysis, H-1 NMR, C-13 NMR, IR spectroscopies, and ESI-MS; moreover, L-2, 1, 2 and 3 were also characterized by single crystal X-ray diffraction. The metal cation in 1 is pentacoordinated with a N3O2 coordination environment; in 2, the metal cations display N4O2 octahedral and N2O3 square-pyramid coordination and in 3 they are in square-planar N-4 sites. In 1, the ligand acts as a pentadentate chelator, and in the other two cases, the ligands behave as octadentate chelators in a 1 kappa N-3:kappa O-2,2 kappa N,3 kappa N,4 kappa N (in 2) or 1 kappa N-3,2 kappa N-3,3 kappa N,4 kappa N fashion (in 3). The cyanoethyl strands of the ligands are directly involved in the formation of the 2D frameworks of 2 and 3, which in the former polymer can be viewed as a net composed of hexametallic 36-membered macrocyclic rings and in the latter generates extra hexametallic 58-membered cyclic sets that form zig-zag layers. The thermal analytical and electrochemical properties of these silver complexes were also studied.

Bionanoconjugados de Citocromo Tri- hémico e nanopartículas de Ouro para biorremediação de Cr(VI)

Dissertação para a obtenção do grau de Mestre em Biotecnologia

Effectiveness of house dust mite acaricide tri-n-butyl tin maleate on carpets, fabrics and mattress foam: a standardization of methodology

The aim of this study was to determine the effectiveness of the acaricide tri-n-butyl tin maleate, industrially applied to samples of carpets, mattress foam, and fabrics used for furniture upholstery, soft toys and shoe uppers. Approximately 100 adult house dust mites of the species Dermatophagoides pteronyssinus were inoculated into a Petri dish containing the sample (a piece of carpet, mattress foam, or fabric), treated with the acaricide, randomly collected. Mite-maintenance culture medium was added on top of each sample. After one, two, three, seven and 30 days of incubation at 25 ºC and 75% relative humidity, each dish was examined using a 40X stereoscopic microscope (40X). One hundred percent acaricide effectiveness was obtained in treated materials by the end of the 30th-day postinoculation period, under optimal conditions for mite maintenance.

Activity of Tri-N-Butyl Tin maleate in carpets against Staphylococcus aureus and Aspergillus niger, verified through two methodologies: Inhibition Halo (HZ) and Inhibition Surface (Print)

The aim of the present study was to verify the activity of the Tri-N-Butyl Tin maleate compound against Staphylococcus aureus and Aspergillus niger, after its industrial application in 40 samples of carpets of different materials (polypropylene, polyester, polyamide and wool). The qualitative assays were performed through two methodologies: Inhibition Halo (HZ) and Inhibition of Surface (Print). The carpet with the product inhibited 100% of bacterial (Staphylococcus aureus) and fungi (Aspergillus niger) growth, under the conditions of this study. The microbial inhibition was higher in upper portion of carpets. The methodologies employed appear to be adequate to test the bactericide and fungicide activities of the Tri-N-Butyl Tin maleate. The print methodology confirmed the results obtained by the inhibition zone assay. Further studies using the same methodologies are needed to confirm our results.

MOLECULAR CHARACTERIZATION OF AMERICAN CUTANEOUS LEISHMANIASIS IN THE TRI‑BORDER AREA OF ASSIS BRASIL, ACRE STATE, BRAZIL

SUMMARY In this study, Leishmaniaspecies were identified by Polymerase Chain Reaction (PCR). The epidemiology of patients suspected of having American Cutaneous Leishmaniasis in the municipality of Assis Brasil, Acre State, located in the Brazil/Peru/Bolivia triborder was also investigated. By PCR, the DNA of Leishmaniawas detected in 100% of the cases (37 samples) and a PCR-Restriction Fragment Length Polymorphism (RFLP) of the hsp 70gene identified the species in 32 samples: Leishmania (Viannia) braziliensis (65.6%) , L. (V.) shawi (28.1%) , L. (V.) guyanensis (3.1%) and mixed infection L. (V.) guyanensis and L. (Leishmania) amazonensis (3.1%)This is the first report of L. (V.) shawiand L. (L.) amazonensis in Acre. The two predominant species were found in patients living in urban and rural areas. Most cases were found in males living in rural areas for at least three years and involved in rural work. This suggests, in most cases, a possible transmission of the disease from a rural/forest source, although some patients had not engaged in activities associated with permanence in forestall areas, which indicate a possible sandflies adaptation to the periurban setting.

Protótipo de um cata-àgua que gera 1 Kw de eletricidade.(*)

Dando continuidade ao trabalho de explorar correntezas de grandes rios para gerar eletricidade sem o uso de barragens, um novo protótipo de micro-usina flutuante (cata-água) foi, construído, com capacidade de gerar 1 kw de eletricidade quando submetido a uma correnteza de 1,1 m/s. A eletricidade é gerada em 110 V 60 Hz com controle manual. A proteção do aparelho contra detritos flutuantes (principalmente as ilhas de capim flutuante) foi identificada como sendo o problema mais importante no desenvolvimento desta tecnologia. É mostrado que os rios Solimões e Amazonas apresentam correnteza, profundidade e potência suficientes para o uso de cata-águas em todos os lugares investigados.

Tri-sector partnerships in social entrepreneurship: discourse and practice of the actors from the circles of action and reflection

This article discusses the construction of tri-sector partnerships in three projects conducted in Brazil in different fields of intervention of public policy (access to water, basic education and performance of boards of rights of children and adolescents). Collaborative articulations involving the players from three sectors (the State, civil society and the market) are practices that are little studied in the Brazilian and even in the international context, as tri-sector partnerships are rare, despite the proliferation of lines of discourse in support of alliances between governments and civil society or between companies and NGOs in the management of public policy. As a research strategy, this study resorted to cooperative inquiry, a method that involves breaking down the boundaries between the subjects and the objects of the analysis. Besides working toward a better understanding of the challenges of building tri-sector partnerships in the Brazilian context, the article also tries to show the relevance to public policy studies of investigative methods based on the subjects studied, as a means of developing an understanding of the practices, lines of discourse and dilemmas linked to social action in social programs.