Controlled growth of anodic aluminium oxide films with hexagonal array of nanometer-sized pores filled with textured copper nanowires

Anodic aluminium oxide (AAO) films exhibiting a homogeneous morphology of parallel pores perpendicular to the surface were prepared in a two-step anodization process and filled with copper by electrochemical deposition. The optimum growth conditions for the formation of freestanding AAO films with hexagonal compact array of cylindrical pores were studied by field emission scanning electron microscopy and small angle X-ray scattering. The results show well-defined periodic structures with uniform pores size distribution for films with pore diameters between 40 and 70 nm prepared using different voltages and temperatures during the second anodization step. X-ray photoelectron spectroscopy and X-ray diffraction analysis of AAO films filled with copper show the formation of nanowires with high structural order, exhibiting a preferential crystalline orientation along the (2 2 0) axis and only small fraction of copper oxides. The best results for textured Cu nanowires were obtained at a reduction potential of -300 mV. (C) 2009 Elsevier Ltd. All rights reserved.

Fruit and seed exploitation by small rodents of the Brazilian Atlantic forest

In the Brazilian Atlantic forest (BAF) there are at least 57 rodent species and most of them are considered omnivorous. These species feed, more or less frequently, on fruits and seeds. Nevertheless the potential role of each species as frugivorous, seed predator or seed disperser is still unclear. In the present study we analyzed patterns of fruit and seed exploitation by eight small rodent species from an Atlantic Forest site. We offered to captive animals fruits of 30 plant species (23 genera, 15 families). After 48 h we recorded consumption patterns of pulp/aril and seed. Rodent species differed in their patterns of fruit and seed exploitation. The smallest species, Akodon serrensis, Oligoryzomys nigripes, and Wilfredomys pictipes (body size range : 26-45 g), and also the medium-sized Oecomys aff. concolor (84 g) fed mainly on pulp and also on small to medium-sized seeds (< 10 mm diameter). The medium-sized rodent, Oryzomys russatus (91 g) fed on pulp and also on seeds with diameter ≤ 15 mm. Thus larger seeds remain intact after being manipulated by such species. The medium-sized Delomys dorsalis (72 g) and the larger Trinomys iheringi (274 g) and Nectomys squamipes (253 g) form a third group, which consumed both fruit and seed of most species independent of their size. These later two species and also O. russatus are probably the main seed predators in the rodent community of the BAF.

Structural change and productivity growth, 20 years later: old problems, new opportunities

Includes bibliography

Latin America and the Caribbean and the European Union: striving for a renewed partnership

Includes bibliography

Promoting corporate social responsibility in small and medium enterprises in the Caribbean: methodology report

Incluye Bibliografía

Trade in services in Latin America and the Caribbean: an analysis of recent trends

Includes bibliography

Promoting corporate social responsibility in small and medium enterprises in the Caribbean: survey results

Includes bibliography

The importance of local production and small-scale enterprises for Latin American development

Includes bibliography

Small particles in Pluto's environment: Effects of the solar radiation pressure

Impacts of micrometeoroids on the surfaces of the plutonian small satellites Nix and Hydra can generate dust particles. Even in this region so far from the Sun these tiny ejected particles are under the effects of the solar radiation pressure. In this work, we investigate the orbital evolution of the escaping ejecta from both the small satellites under the effects of the radiation pressure combined with the gravitational effects of Pluto, Charon, Nix and Hydra. The mass production rate of micron-sized dust particles generated by micrometeoroids hitting the satellites is obtained, and numerical simulations are performed to derive the lifetime of the ejecta. These pieces of information allow us to estimate the optical depth of a putative ring, which extends from the orbits of Nix to Hydra. The ejected particles, between the orbits of Nix and Hydra, form a wide ring of about 16 000 km. Collisions with the massive bodies and escape from the system are mainly determined by the effects of the solar radiation pressure. This is an important loss mechanism, removing 30 per cent of the initial set of 1 μm-sized particles in 1 yr. The surviving particles form a ring too faint to be detectable with the derived maximum optical depth of 4 × 10-11. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

Electronic data interchange in port management: the experience of the port of Barcelona

Every port is unique. Although all ports exist for the same basic purpose (to act as an interface in the transfer from one mode of transport to another), no two are ever organized in the same way.Ports may be classified according to: Physical conditions: location (geographical position, man-made or natural harbour, estuary location, difficult weather conditions, tides, etc.) and size (large, small or medium-sized). Use: commercial (general cargo, bulk solids, bulk liquids, oil, break bulk, mixed), passenger, sport and leisure, fishing, mixed, etc. Ownership: private, municipal, regional or State-owned. The Port Authority's role in management of the port: Overall control, i.e. the Port Authority plans, sets up and operates the whole range of services. Facilitator, i.e. the Port Authority plans and sets up the infrastructure and the superstructure, but services are provided by private companies. Landlord, i.e. the Port Authority allows private companies to be responsible for the superstructure and provide port services. Different combinations of port types will therefore give rise to different kinds of organization and different information flows, which means that the associated information systems may differ significantly from port to port. Since this paper relates to the port of Barcelona, with its own specific characteristics, the contents may not always be applicable to other ports.

Fact Findings and Lessons Learned from the Comparative Study on Information Techonology (IT) Usage by Small and Medium Enterprises (SMEs) in Latin America and Asia

ECLACs International Trade and Integration Division (DCII) will launch the book titled Information Technology for Development of Small and Medium-sized Exporters in Latin America and East Asia in the end of September 2005. The report provides an overview of the present condition of Information Technology (IT) and its use to promote international trade. It focuses on the experiences of IT usage by small- and medium-sized enterprises (SMEs) in the Latin American and Asian-Pacific regions, with a special focus on SME exporters in the 13 researched countries, that were selected from the Forum for East Asia - Latin America Cooperation (FEALAC) member countries. This issue of the FAL bulletin is produced based on the executive summary of the book.

A indústria de confecção do vestuário na região metropolitana de Belém-PA

Partindo do instrumental teórico neo-schumpeteriano e institucionalista, a presente pesquisa faz uma análise sobre a expansão do arranjo produtivo da indústria de confecção e da moda na Região Metropolitana de Belém (RMB) Pará, e do tecido institucional, de 1991 a 2008. Os objetivos da pesquisa são analisar o processo de formação e desenvolvimento do arranjo produtivo local, identificar a configuração e as características da estrutura produtiva e das atividades institucionais de apoio e as relações de sinergia entre agentes, analisar como estão constituídas as formas de governança e externalidades existentes e como essas podem dinamizar o processo de desenvolvimento desse arranjo produtivo. A proposta deste trabalho pretende responder a três questões: Por que o segmento da indústria do vestuário não se desenvolveu na RMB? Como a dinâmica do setor e das características dos fenômenos da inovação tecnológica no ramo é vivenciada pelos empresários das pequenas e médias empresas do setor de confecção na RMB? Como ocorre a coexistência de dois processos, a modernização e a precarização no setor de confecção na RMB? A pesquisa empírica realizada representa 55% do emprego formal na RMB. Nesse processo, observou-se a inexistência da ação institucional anterior ao período pesquisado e isso limitou a evolução científica e tecnológica do setor, assim como o desenvolvimento da cadeia produtiva. Essa condição levou os produtores atomizados a baixos níveis de sinergia e representatividade. Em função disso, as taxas de crescimento na indústria foram muito baixas, a dificuldade de se encontrar mão-de-obra qualificada é apontada como maior entrave ao desenvolvimento da indústria. A maioria das empresas instaladas é produtora de uniformes, mas constatou-se nos três últimos anos a abertura de empresas dedicadas à fabricação de produtos de moda. Apesar da dificuldade encontrada pelas indústrias em funcionamento, observou-se um movimento social na construção e ampliação do conhecimento técnico e da promoção de um arranjo produtivo impulsionado pela vontade de fazer moda, a atuação de designers e instituições promovem o desejo de transformar a moda em coisa nossa. O desenvolvimento da moda no Pará, como movimento espontâneo e meio de expressão da cultura local, representa, de certa forma, a vontade de inserir a cultura local no contexto do consumo contemporâneo. A moda é uma forma de estabelecimento de relação com o lugar que considera a ação na construção de uma mitologia local. A questão da especificidade do local é de grande importância para os mercados, portanto, deve-se levar em conta a importância e a potencialidade de um mercado povoado por um grande número de consumidores ávidos por inserção e diferenciação, emocionalmente atrelados ao local. Os atores pesquisados apontam que, para estimular o desenvolvimento da cadeia produtiva têxtil-vestuário, seriam necessários mais investimentos na formação de mão-de-obra que favoreça o desenvolvimento das atividades já em funcionamento, e que permitam ampliar a viabilidade de investimentos em um setor de fundamental importância na história da industrialização e na vida cotidiana dos seres humanos, no mundo capitalista contemporâneo que tem o consumo como mito fundamental. Esta pesquisa contribui para um melhor entendimento do setor.

Memória organizacional e a constituição de bases de conhecimento

Pós-graduação em Ciência da Informação - FFC

Utilização dos sistemas integrados de gestão - ERP: estudo de múltiplos casos em pequenas e médias empresas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Chronic reparative changes in medium-sized vessels in a case of primary cutaneous anaplastic large-cell lymphoma with angioinvasive features and cytotoxic phenotype: new histopathological findings in line with indolent clinical behavior

Angioinvasion/angiodestruction has been reported in a small subset of primary cutaneous anaplastic large-cell lymphomas (PCALCL). Recently, PCALCL with angioinvasive features and cytotoxic phenotype has been characterized as a variant associated with good clinical outcomes despite worrisome histopathologic features. We report a case of PCALCL with angioinvasive features and cytotoxic phenotype associated with reparative changes on the wall of medium-sized vessels involved by the neoplasm, including intimal fibroblastic proliferation and luminal obliteration. This vascular pattern, although previously unreported in PCALCL, is in accordance with the indolent behavior observed in this entity and provides a further link with lymphomatoid papulosis type E.