INSTITUTO DE PESQUISAS ENERGÉTICAS E NUCLEARES
Repositório Digital da Produção Técnico Científica

Navegação Periódicos - Artigos por Autores IPEN "LEAL NETO, RICARDO M."

Navegação Periódicos - Artigos por Autores IPEN "LEAL NETO, RICARDO M."

Classificar por: Ordenar: Resultados:

  • IPEN-DOC 16544

    FALCAO, RAILSON B.; DAMMANN, EDGAR D.C.C.; ROCHA, CLAUDIO J. da ; LEAL NETO, RICARDO M. . An investigation on the mechanical alloying of TiFe compound by high-energy ball milling. Materials Science Forum, v. 660-661, p. 329-334, 2010.

    Palavras-Chave: intermetallic compounds; titanium alloys; iron alloys; milling; mechanical properties; alloys

    Como referenciar este item
    Icon

  • IPEN-DOC 11622

    BAUCIA, JOSE A.; LEAL NETO, RICARDO M. ; ROGERO, JOSE R. ; NASCIMENTO, NANCI do . Anti-calcifying treatment of glutaraldehyde fixed bovine pericardium: comparisons and evaluation of possible synergic effects / Tratamentos anticalcificantes do pericárdio bovino fixado com glutaraldeído: comparação e avaliação de possíveis efeitos sinérgicos. Revista Brasileira de Cirurgia Cardiovascular, v. 21, n. 2, p. 180-187, 2006.

    Palavras-Chave: cattle; pericardium; aldehydes; calcium; cardiovascular diseases; diseases; surgical materials; heart; valves; implants; synergism; gamma radiation; compatibility; biological materials

    Como referenciar este item
    Icon

  • IPEN-DOC 25057

    BARDELLA, FERNANDO ; MORAES, RAFAEL C. de ; SARINGELOS, THANOS; KARATZAFERIS, ALEXANDROS; RODRIGUES, ANDRE M. ; SILVA, ANDRE G. da ; LEAL NETO, RICARDO M. . Architecting 3D interactive educational applications for the web: the case study of crystalwalk. Multimodal Technologies and Interaction, v. 2, n. 3, p. 1-12, 2018. DOI: 10.3390/mti2030056

    Abstract: This paper describes the technical development of CrystalWalk, a crystal editor and visualization software designed for teaching materials science and engineering aiming to provide an accessible and interactive platform to students, professors and researchers. Justified by the lack of proper didactic tools, an evaluation of the existing crystallographic software has further shown opportunities for the development of a new software, more focused on the educational approach. CrystalWalk’s was guided by principles of free software, accessibility and democratization of knowledge, which was reflected in the application’s architecture strategy and the adoption of state-of-the-art technologies for the development of interactive web applications, such as HTML5/WebGL, service-oriented architecture (SOA) and responsive, resilient and elastic distributed systems. CrystalWalk’s architecture was successful in supporting the implementation of all specified software requirements proposed by state-of-the-art research and deemed to exert a positive impact in building accessible 3D interactive educational applications for the web.

    Palavras-Chave: crystals; computer graphics; educational tools; websites; interactive display devices; crystallography; computer codes; computer architecture

    Como referenciar este item
    Icon

  • IPEN-DOC 27150

    BARDELLA, FERNANDO ; RODRIGUES, ANDRE M. ; LEAL NETO, RICARDO M. . Crystalwalk: an educational interactive software for synthesis and visualization of crystal structures. Journal of Materials Education, v. 41, n. 5-6, p. 157-180, 2019.

    Palavras-Chave: crystallography; crystallization; crystals; materials working; rheology; programming languages; engineering; educational tools; knowledge management; knowledge preservation

    Como referenciar este item
    Icon

  • IPEN-DOC 23150

    BARDELLA, FERNANDO ; RODRIGUES, ANDRE M. ; LEAL NETO, RICARDO M. . CrystalWalk: crystal structures, step by step. Journal of Applied Crystallography, v. 50, p. 949-950, 2017. DOI: 10.1107/S160057671700560X

    Abstract: CrystalWalk is a crystal editor and visualization software designed for teaching materials science and engineering. Based on WebGL/HTML5, it provides an accessible and interactive platform to students and teachers by introducing a simplified crystallographic approach that creates crystal structures by combining a lattice with a motif without the use of its internal symmetry. CrystalWalk is the first software to use solely translational symmetry, aiming to introduce engineering students to the basic concepts of lattice and motif. Although very restrictive from the crystallographic point of view, CrystalWalk makes it simple for students to experiment, reproduce and visualize, in an interactive manner, most of the crystal structures that are commonly introduced in materials science and engineering curricula.

    Palavras-Chave: crystal structure; crystallography; computer codes; educational tools; technology transfer; education

    Como referenciar este item
    Icon

  • IPEN-DOC 12286

    BAUCIA, JOSE A.; LEAL NETO, RICARDO M. ; ROGERO, JOSE R. ; NASCIMENTO, NANCI do ; REYES, CARMEM A.C.. Efeitos da radiacao gama no comportamento mecanico e na calcificacao do pericardio bovino fixado com glutaraldeido. Brazilian Journal of Cardiovascular Surgery, v. 22, n. 1, p. 75-80, 2007.

    Palavras-Chave: cattle; pericardium; gamma radiation; radiation effects; mechanical properties; calcinosis; aldehydes

    Como referenciar este item
    Icon

  • IPEN-DOC 27579

    FERREIRA, NELSON D.; LEAL NETO, RICARDO M. ; FILGUEIRA, MARCELLO; ALVES, MANUEL F.R.P.; SANTOS, CLAUDINEI dos; RAMOS, ALFEU S.. Effect of cobalt doping and milling time on microstructure and Vickers microhardness of the spark plasma sintered (67-x)Ti-xCo-22Si-11B (x = 2 and 6 at-%) alloys. Materials Research, v. 23, n. 6, p. 1-10, 2020. DOI: 10.1590/1980-5373-MR-2020-0337

    Abstract: Ti-6Al-4V and TiAl-based alloys are widely used for fabricating the implantable orthopedic devices and automotive components, respectively. Ti6Si2B-based alloys are attractive for use in orthopedic components because their higher hardness, superior biocompatibility and corrosion resistance in simulated body fluid than Ti and Ti-6Al-4V alloy. Limited information on Ti6Si2B stability in Co-dopped 67Ti-22Si-11B alloys are available in literature. This work presents the effect of cobalt doping and milling time on microstructure and Vickers microhardness of 65Ti-2Co-22Si-11B and 61Ti-6Co-22Si-11B (at-%) alloys produced by spark plasma sintering at 1100 oC for 12min using 20MPa. Samples were characterized by X ray diffraction, scanning electron microscopy, energy dispersive spectrometry, laser particle size analysis, and Vickers microhardness. Sintered alloys with 2 and 6at-%Co indicated the major presence of Ti6Si2B and Ti5Si3 dissolving up to 2.7 and 4.2 at-%Co, respectively, besides the minor precipitates of CoTi2 (4.4-16.7at-%Si) and CoTi (4.6-4.7at-%Si). Vickers microhardness of the sintered 65Ti-2Co-22Si-11B and 61Ti-6Co-22Si-11B alloys were in the range of 950-1050 and 1050-1150HV, respectively. Although the increase from 2 to 6at-%Co has reduced the Ti6Si2B stability, the Co-rich phases increased their hardness values up to 1150HV (11.3GPa), which are superior than those of commercial Ti alloys used for joint orthopedic components and automotive rotating parts.

    Palavras-Chave: cobalt; cobalt hydroxides; doped materials; titanium alloys; implants; microstructure; plasma; sintering

    Como referenciar este item
    Icon

  • IPEN-DOC 29094

    FREITAS, ARTUR C. de ; COSTA, DIOGO R.; JARDIM, PAULA M.; LEAL NETO, RICARDO M. ; CARVALHO, ELITA F.U. de ; DURAZZO, MICHELANGELO . Effects of aluminum distearate addition on UO2 sintering and microstructure. Progress in Nuclear Energy, v. 153, p. 1-12, 2022. DOI: 10.1016/j.pnucene.2022.104440

    Abstract: Uranium dioxide (UO2) is widely used as a fuel in commercial nuclear light-water reactors (LWRs). Rigorous control of density, pore, and grain size of UO2 pellets are important prerequisites for fuel performance. Solid lubricants, frequently used in pellets manufacturing, minimize structural defects on compaction such as cracks and end-capping, promoting grain growth during sintering. This work presents and discusses the effects of the aluminum distearate (ADS) addition on the sintering behavior and microstructure of UO2 fuel pellets. UO2 and UO2-0.2wt% ADS pellets were sintered at 1760 °C for 5.7 h for comparison purposes. The results show that the densification rate increases using the solid lubricant, but the shrinkage is lowered by 0.7% due to low homogenization. The average grain size was increased by about 35% during sintering. Based on our results and a literature review, a mechanism for grain growth by aluminum addition is proposed.

    Palavras-Chave: uranium dioxide ; nuclear fuels; nuclear fuels; reactors; fuel pellets; aluminium; sintering; grain growth

    Como referenciar este item
    Icon

  • IPEN-DOC 18188

    DURAZZO, MICHELANGELO ; ROCHA, CLAUDIO J. da ; MESTNIK FILHO, JOSE ; LEAL NETO, RICARDO M. . Fabrication of powder from ductile U-Mo alloys for use as nuclear dispersion. Materials Science Forum, v. 727-728, p. 362-367, 2012.

    Palavras-Chave: alloys; chemical properties; enrichment; gamma radiation; mechanical properties; uranium-molybdenum fuels; research and test reactors; uranium; iear-1 reactor; dispersion nuclear fuels; fabrication; highly enriched uranium

    Como referenciar este item
    Icon

  • IPEN-DOC 28128

    OLIVEIRA, VERONA B.; BEATRICE, CESAR A.G.; LEAL NETO, RICARDO M. ; SILVA, WAGNER B.; PESSAN, LUIZ A.; BOTTA, WALTER J.; LEIVA, DANIEL R.. Hydrogen absorption/desorption behavior of a cold-rolled TiFe intermetallic compound. Materials Research, v. 24, n. 6, p. 1-10, 2021. DOI: 10.1590/1980-5373-MR-2021-0204

    Abstract: The (de)hydrogenation properties of a TiFe intermetallic compound (IMC) alloy activated by cold rolling inside a glovebox at ambient temperature were investigated by kinetic measurements, x-ray powder diffraction (XRD), and transmission electron microscopy (TEM). Rate-limiting steps were identified by testing kinetic models on hydrogen absorption and desorption curves. To prevent surface poisoning during air exposure, the TiFe IMC was also cold rolled with polytetrafluoroethylene (PTFE) and ultra-high molecular weight polyethylene (UHMWPE). The addition of either PTFE or UHMWPE to nanostructured TiFe by cold rolling did not produce a polymer-metal composite with O2 poisoning resistance, regardless of the polymer-mixing way adopted. This occurred because large surfaces of the particles were not adequately coated with polymer. The results identify challenges to the TiFe IMC polymer-covered material that must be overcome before a methodology can significantly contribute to the formation of nanostructured TiFe-polymer composites with enhanced hydrogen storage properties. The diffusion-controlled reactions in the cold-rolled TiFe IMC without polymer were prevalent in all cases, as predicted by the Jander three-dimensional diffusion model. The main contribution of this work regards estimation of the amount of hydrogen released, which was 0.60% after 6 min and reproducible for the three subsequent cycles.

    Palavras-Chave: intermetallic compounds; titanium compounds; nanostructures; rolling; polymers; simulation; hydrides

    Como referenciar este item
    Icon

  • IPEN-DOC 24371

    RODRIGUES, ANDRE M.; BARDELLA, FERNANDO ; ZUFFO, MARCELO K.; LEAL NETO, RICARDO M. . Integrated approach for geometric modeling and interactive visual analysis of grain structures. Computer-Aided Design, v. 97, p. 1-14, 2018. DOI: 10.1016/j.cad.2017.11.001

    Abstract: This paper presents a novel approach that integrates geometric modeling and visual analysis of grain structures in an open source CAD system, aimed at educational purposes. An intuitive and simple automated modeling method produces valid polygonal representations of grain structures, by adopting a novel physics-based particle packing procedure with Voronoi-based tessellation. Models are structured to facilitate the development of interactive visualization prototypes in 3D interactive engines. Microstructural fidelity was pursued for the synthetic models to be accepted as representations of real materials. Meaningful sample's parameters such as mean number of neighbors and mean number of edges per face were replicated with acceptable precision, when compared to values obtained from 3D reconstruction of an alpha-iron sample. Domain-specific interactive experimental tools informed by learning and cognitive research sought to enhance spatial cognition of grain structures and support learning their fundamental features.

    Palavras-Chave: simulation; automation; grain size; topology; distribution; computer-aided design

    Como referenciar este item
    Icon

  • IPEN-DOC 25795

    FERREIRA, NELSON D.; LEAL NETO, RICARDO M. ; FILGUEIRA, MARCELLO; FERREIRA, LUCAS M.; ALVES, MANUEL F.R.P.; RAMOS, ERIKA C.T.; NUNES, CARLOS A.; SANTOS, CLAUDINEI dos; RAMOS, ALFEU S.. Microstructure and Vickers hardness of mechanically alloyed and spark plasma sintered Ti-2Zn-22Si-11B and Ti-6Zn-22Si-11B alloys. Journal of Alloys and Compounds, v. 794, p. 615-624, 2019. DOI: 10.1016/j.jallcom.2019.04.172

    Abstract: This work reports on effect of zinc and milling time on microstructure and Vickers hardness of mechanically alloyed and spark plasma sintered (66,7-x)Ti-xZn-22,2Si-11,1B alloys (at.-%, with x ¼ 2 and 6 at.-%). Ball milling at different times (20, 60, 180 and 300 min) was performed under argon atmosphere in a planetary ball mill from these elemental powder mixtures. Cylinder bodies with 10mm diameter were consolidated by spark plasma sintering (1100 C, 12 min, 20MPa) under argon atmosphere. Asmilled powders and sintered Ti-Zn-Si-B samples were evaluated by X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry, laser diffraction particle size analysis, and Vickers hardness tests. It was noted a similar behavior during ball milling of Ti-Zn-Si-B powder mixtures. Only the a-Ti and Si peaks were indexed in XRD patterns of Ti-Zn-Si-B powders milled for 300min. Rietveld refining indicated that the amount of amorphous structures has increased during milling up to 300 min, which was more pronounced for the Ti-6Zn-22Si-11B powders. The particle sizes of the Ti-2Zn-22Si-11B and Ti-6Zn-22Si-11B powder mixtures increased during milling from 94 (20 min) to 156 (300min) mm and from 101 (20 min) to 136 (300 min) mm, respectively. Coherently, the average specific surface area of powder particles was continuously reduced during milling. Despite the adopted parameters, the SPS process produced dense Ti-xZn-22Si-11B (x ¼ 2 and 6 at.-%) alloys with 98% from their theoretical specific mass. Regardless of milling time, the Ti6Si2B formation was inhibited in microstructure of the spark plasma sintered Ti-6Zn-22Si-11B alloy previously milled for longer times. EDS analysis indicated that the Ti6Si2B phase dissolved close to 1.8 at.-% Zn. Beside the TiB and Ti5Si3, the Ti2Zn and Ti3Zn (not explored) phases were also found in microstructure of sintered Ti-Zn-Si-B alloys. The Ti-2Zn-22Si-11B alloy presented average Vickers hardness values higher than 1050 HV whereas the Ti-6Zn-22Si-11B alloy varied between 970 and 1036 HV, which could be associated with the Ti6Si2B formation.

    Palavras-Chave: zinc; titanium alloys; vickers hardness; plasma; sintering; microstructure; healing; bone mineral density

    Como referenciar este item
    Icon

  • IPEN-DOC 12989

    LEAL NETO, RICARDO M. ; FERREIRA, PAULO I. . Progress of the NbAlsub(3) combustion synthesis reaction. Journal of Materials Synthesis and Processing, v. 7, n. 4, p. 245-252, 1999.

    Palavras-Chave: niobium; aluminium; intermetallic compounds; powders; mixtures; synthesis; optical microscopy; scanning electron microscopy

    Como referenciar este item
    Icon

  • IPEN-DOC 25088

    DURAZZO, MICHELANGELO ; FREITAS, ARTUR C. ; SANSONE, ALBERTO E.S. ; FERREIRA, NILDEMAR A.M. ; CARVALHO, ELITA F.U. de ; RIELLA, HUMBERTO G. ; LEAL NETO, RICARDO M. . Sintering behavior of UO2-Er2O3 mixed fuel. Journal of Nuclear Materials, v. 510, p. 603-612, 2018. DOI: 10.1016/j.jnucmat.2018.08.051

    Abstract: The incorporation of burnable neutron absorbers into nuclear fuel pellets is important regarding reactivity compensation, which enables longer fuel cycles. The dry mechanical blending route is the most attractive process to accomplish absorbers incorporation because of its simplicity. By using this route, the present work has investigated the sintering behavior of UO2Er2O3 mixed fuel. A comparison with UO2Gd2O3 sintering behavior was presented. The behavior of UO2Er2O3 fuel sintering was similar to that reported for UO2Gd2O3 fuel, e.g. two-stage sintering with two peaks in the shrinkage rate curves. The effect showed to be less pronounced for Er2O3. This was attributed to the characteristics of the Er2O3 powder particles used as raw-material, whose agglomerates can be more easily broken and thus better homogenized during the blending with UO2 powder. These results confirmed that sinterability depends directly on the quality of the homogenization of the powders, as seen previously. A second phase was experimentally detected in the UO2Er2O3 system, but its impact on the sintering behavior of this mixed fuel has not yet been clarified.

    Palavras-Chave: nuclear fuels; pwr type reactors; diffusion barriers; gadolinium; gadolinium oxides; sintering; solid solutions; uranium dioxide

    Como referenciar este item
    Icon

  • IPEN-DOC 23230

    SILVA, GUSTAVO S. de A. e; LEAL NETO, RICARDO M. ; HENRIQUES, VINICIUS A.R.; CAIRO, CARLOS A.A.; RAMOS, ALFEU S.. Structural evaluation of mechanically alloyed W-50at%C powders. Materials Science Forum, v. 899, p. 9-12, 2017. DOI: 10.4028/www.scientific.net/MSF.899.9

    Abstract: Tungsten carbide is potentially attractive for development of catalysts and widely used for fabrication of cutting tools due to its high hardness and wear resistance while the ball milling can improve the mechanical properties from the metastable structures and nanomaterials. The aim of this work was to evaluate the phase transformations during milling of the W-50at%C elemental powder mixture under argon atmosphere in a planetary P-5 ball mill using WC-Co balls (10 mm diameter) and vials (225 mL), 200 rpm, and a ball-to-powder weight ratio of 10:1. Samples were collected into the vial after different times: 20, 60, 300 and 600 min. The as-milled W-50at%C powders were characterized by X-ray diffraction (XRD). Only peaks of W were identified in W-50at%C powders milled up to 600 min, which were broadened and moved to the direction of smaller diffraction angle. In addition, the lattice parameter and cell volume of W were reduced during ball milling of W-50at%C powders, indicating that the C atoms dissolved into the W lattice in order to form metastable structures. Carbon atoms were interstitially dissolved into the W lattice during the initial milling times, and its preferential substitutional dissolution was identified for longer times due to the larger amounts of crystallographic defects during ball milling.

    Palavras-Chave: tungsten carbides; wear resistance; ceramics; mechanical properties; metallurgical effects; alloys

    Como referenciar este item
    Icon

  • IPEN-DOC 12832

    PERIGO, ELIO A.; SOARES, EDSON P. ; LEAL NETO, RICARDO M. ; MOTTA, CLAUDIO C.; FARIA JUNIOR, RUBENS N. de . A study of high-energy milling for the production of sintered PrFeB magnets. Materials Research, v. 10, n. 3, p. 311-314, 2007. DOI: 10.1590/S1516-14392007000300018

    Palavras-Chave: milling; boron alloys; iron alloys; praseodymium alloys; magnets; magnetic properties; sintered materials; hydrogen

    Como referenciar este item
    Icon

  • IPEN-DOC 23231

    LEAL NETO, RICARDO M. ; SILVA, RAFAEL de A.; FLORIANO, RICARDO; COUTINHO, GRAZIELE C.S. ; FALCAO, RAILSON B. ; LEIVA, DANIEL R.; BOTTA, WALTER J.. Synthesis by high-energy ball milling of MgH2-TiFe composites for hydrogen storage. Materials Science Forum, v. 899, p. 13-18, 2017. DOI: 10.4028/www.scientific.net/MSF.899.13

    Abstract: The aim of this work is to investigate the influence of some processes variables on the microstructure and hydrogen absorption kinetics of MgH2 - X wt.% TiFe composites. Samples were synthesized by high-energy ball milling in a planetary (X = 40, 50, 60) and shaker mill (X = 40) under high-purity argon atmosphere. Commercial MgH2 instead of Mg powder was used in order to reduce adherence on the vial and balls. TiFe powder was previously produced by ball milling a mixture of TiH2 and Fe powders followed by a reaction synthesis at 600ºC. Milled composites samples were characterized by XRD and SEM analysis. Milling time was preliminary investigated (X = 40) in the planetary ball mill (6 to 36h). TiFe particle size reduction was shown to be difficult since they are surrounded by MgH2 matrix. Strong particle reduction was obtained by using a shaker mill only for 2 hours and adding cyclohexane as process control agent. No reaction between MgH2 and TiFe compound was observed in any milled sample. Hydrogen absorption kinetics measurements of the as-milled samples were conducted on an Sieverts' type apparatus at room temperature after hydrogen desorption at 350ºC under vacuum. The best hydrogen kinetics (3 wt% at the first hour) was attained by the planetary milled sample (36 h). Higher hydrogen capacity was observed for the sample milled in the shaker mill (4.0 wt.%), but only after 13h.

    Palavras-Chave: milling; hydrogen storage; magnesium hydrides; composite materials; iron base alloys; titanium

    Como referenciar este item
    Icon

  • IPEN-DOC 20547

    FALCAO, RAILSON B. ; DAMMANN, EDGAR D.C.C. ; ROCHA, CLAUDIO J. da ; ICHIKAWA, RODRIGO U. ; DURAZZO, MICHELANGELO ; MARTINEZ, LUIS G. ; LEAL NETO, RICARDO M. . Synthesis of TiFe compound from ball milled TiHsub(2) and Fe powders mixtures. Materials Science Forum, v. 802, p. 61-65, 2014. DOI: 10.4028/www.scientific.net/msf.802.61

    Palavras-Chave: intermetallic compounds; titanium; mixtures; milling; hydrogen storage; x-ray diffraction; scanning electron microscopy; differential thermal analysis; iron; powders

    Como referenciar este item
    Icon

  • IPEN-DOC 26450

    BARDELLA, FERNANDO ; RODRIGUES, ANDRE M. ; LEAL NETO, RICARDO M. . The use of crystallographic software as educational support to materials science and engineering. Journal of Materials Education, v. 40, n. 3-4, p. 79-106, 2018.

    Abstract: Justified by the lack of proper didatic tools, a systematic review process was executed to verify at what extent existing crystallographic software can support the teaching process and the understanding of crystal structures in materials science and engineering disciplines. A revision protocol was established and executed, where 26 references were selected and analyzed from a total of 804 software from the International Union of Crystallography (IUCr) software database. The research questions were deemed properly answered by this revision, where both a group of top performers (Class A) and gaps not fulfilled by any software, revealed enhancement possibilities and opportunities for development of new software focused on the educational support to materials science and engineering curricula.

    Palavras-Chave: education; crystallography; data processing; computer codes; engineering; educational tools; training

    Como referenciar este item
    Icon

  • IPEN-DOC 19901

    DURAZZO, MICHELANGELO ; LEAL NETO, RICARDO M. ; SALIBA SILVA, ADONIS M. ; URANO de CARVALHO, ELITA F. ; RIELLA, HUMBERTO G.. The role of Gdsub(2)Osub(3) phase transition on UOsub(2)-Gdsub(2)Osub(3) fuel sintering. Nuclear Technology, v. 182, n. 1, p. 57-62, 2013.

    Palavras-Chave: nuclear fuels; fabrication; mixed oxide fuels; gadolinium oxides; transition elements; uranium dioxide; sintering

    Como referenciar este item
    Icon

A pesquisa no RD utiliza os recursos de busca da maioria das bases de dados. No entanto algumas dicas podem auxiliar para obter um resultado mais pertinente.

✔ É possível efetuar a busca de um autor ou um termo em todo o RD, por meio do Buscar no Repositório , isto é, o termo solicitado será localizado em qualquer campo do RD. No entanto esse tipo de pesquisa não é recomendada a não ser que se deseje um resultado amplo e generalizado.

✔ A pesquisa apresentará melhor resultado selecionando um dos filtros disponíveis em Navegar

✔ Os filtros disponíveis em Navegar tais como: Coleções, Ano de publicação, Títulos, Assuntos, Autores, Revista, Tipo de publicação são autoexplicativos. O filtro, Autores IPEN apresenta uma relação com os autores vinculados ao IPEN; o ID Autor IPEN diz respeito ao número único de identificação de cada autor constante no RD e sob o qual estão agrupados todos os seus trabalhos independente das variáveis do seu nome; Tipo de acesso diz respeito à acessibilidade do documento, isto é , sujeito as leis de direitos autorais, ID RT apresenta a relação dos relatórios técnicos, restritos para consulta das comunidades indicadas.

A opção Busca avançada utiliza os conectores da lógica boleana, é o melhor recurso para combinar chaves de busca e obter documentos relevantes à sua pesquisa, utilize os filtros apresentados na caixa de seleção para refinar o resultado de busca. Pode-se adicionar vários filtros a uma mesma busca.

Exemplo:

Buscar os artigos apresentados em um evento internacional de 2015, sobre loss of coolant, do autor Maprelian.

Autor: Maprelian

Título: loss of coolant

Tipo de publicação: Texto completo de evento

Ano de publicação: 2015

✔ Para indexação dos documentos é utilizado o Thesaurus do INIS, especializado na área nuclear e utilizado em todos os países membros da International Atomic Energy Agency – IAEA , por esse motivo, utilize os termos de busca de assunto em inglês; isto não exclui a busca livre por palavras, apenas o resultado pode não ser tão relevante ou pertinente.

✔ 95% do RD apresenta o texto completo do documento com livre acesso, para aqueles que apresentam o significa que e o documento está sujeito as leis de direitos autorais, solicita-se nesses casos contatar a Biblioteca do IPEN, bibl@ipen.br .

✔ Ao efetuar a busca por um autor o RD apresentará uma relação de todos os trabalhos depositados no RD. No lado direito da tela são apresentados os coautores com o número de trabalhos produzidos em conjunto bem como os assuntos abordados e os respectivos anos de publicação agrupados.

✔ O RD disponibiliza um quadro estatístico de produtividade, onde é possível visualizar o número dos trabalhos agrupados por tipo de coleção, a medida que estão sendo depositados no RD.

✔ Na página inicial nas referências são sinalizados todos os autores IPEN, ao clicar nesse símbolo será aberta uma nova página correspondente à aquele autor – trata-se da página do pesquisador.

✔ Na página do pesquisador, é possível verificar, as variações do nome, a relação de todos os trabalhos com texto completo bem como um quadro resumo numérico; há links para o Currículo Lattes e o Google Acadêmico ( quando esse for informado).

ATENÇÃO!

ESTE TEXTO "AJUDA" ESTÁ SUJEITO A ATUALIZAÇÕES CONSTANTES, A MEDIDA QUE NOVAS FUNCIONALIDADES E RECURSOS DE BUSCA FOREM SENDO DESENVOLVIDOS PELAS EQUIPES DA BIBLIOTECA E DA INFORMÁTICA.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

1. Portaria IPEN-CNEN/SP nº 387, que estabeleceu os princípios que nortearam a criação do RDI, clique aqui.


2. A experiência do Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP) na criação de um Repositório Digital Institucional – RDI, clique aqui.

O Repositório Digital do IPEN é um equipamento institucional de acesso aberto, criado com o objetivo de reunir, preservar, disponibilizar e conferir maior visibilidade à Produção Científica publicada pelo Instituto, desde sua criação em 1956.

Operando, inicialmente como uma base de dados referencial o Repositório foi disponibilizado na atual plataforma, em junho de 2015. No Repositório está disponível o acesso ao conteúdo digital de artigos de periódicos, eventos, nacionais e internacionais, livros, capítulos, dissertações, teses e relatórios técnicos.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.