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  • IPEN-DOC 30047

    BERECZKI, ALLAN ; DIPOLD, JESSICA ; FREITAS, ANDERSON Z. ; WETTER, NIKLAUS . Direct nanoplastics detection below the diffraction limit using micro Raman. In: CONFERENCE ON LASERS AND ELECTRO-OPTICS: APPLICATIONS AND TECHNOLOGY, May 7-12, 2023, San Jose, CA, USA. Proceedings... Washington, DC, USA: Optica Publishing Group, 2023. DOI: 10.1364/CLEO_AT.2023.ATh3I.2

    Abstract: Raman spectra of polystyrene nanoparticles of 50 nm diameter were directly measured using micro-Raman spectroscopy. Data analysis demonstrated that particles as small as 20 nm could be directly measured with this simple and robust technique.

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  • IPEN-DOC 08468

    ROCHA, F.D.G.; CECATTI, S.G.P.; CALDAS, L.V.E. . Dosimetric characterisation of Brazilian natural stones using the thermally stimulated exoelectron emission technique. In: INTERNATIONAL CONFERENCE ON SOLID STATE DOSIMETRY, 13th, July 9-13, 2001, Athens, Greece. 2001.

    Palavras-Chave: dosimetry; dosemeters; brazil; silicate minerals; radiation detection; gamma detection; x-ray detection; exoelectrons; electron emission; glow curve; thermoluminescence

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  • IPEN-DOC 27333

    WETTER, NIKLAUS U. ; SILVA, DIEGO S. da ; KASSAB, LUCIANA R.P.; ROSSI, WAGNER de . Double line Neodymium doped GeO2-PbO waveguide amplifier for the second telecom window. In: JIANG, SHIBIN (Ed.); DIGONNET, MICHEL J.F. (Ed.) SPIE PHOTONICS WEST; SPIE OPTO, February 1-6, 2020, San Francisco, USA. Proceedings... Washington, USA: SPIE, 2020. p. 112760M-1 - 112760M-7. (Proceedings SPIE 11276, Optical Components and Materials XVII). DOI: 10.1117/12.2544291

    Abstract: We report the production of active double waveguides in germanate glasses, GeO2-PbO doped with Nd3+, by direct femtosecond laser writing. The glasses were produced using the melt-quenching technique and the active waveguides were written using 30 fs laser pulses at 800 nm with different parameters of writing speeds and pulse energies depending on the rare earth elements used for doping. The photo-induced refractive index change was 5.2x10-3. The Nd doped sample exhibited a relative gain of 3.6 dB/cm for 1.6 mW of 805 nm pump power. The results obtained in present work demonstrate that Nd3+ doped GeO2-PbO glasses are promising materials for the fabrication of integrated amplifiers, lossless components and lasers based on germanate glasses.

    Palavras-Chave: optical systems; spectroscopy; amorphous state; doped materials; metallic glasses; neodymium; germanium oxides; lead oxides

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  • IPEN-DOC 27331

    BERECZKI, A. ; WETTER, NIKLAUS U. . Dynamically stable lasers from commercial Nd:YAG modules with high beam quality and single-frequency: the correct choice of the fundamental waist size at the rod. In: KUDRYASHOV, ALEXIS V. (Ed.); PAXTON, ALAN H. (Ed.); ILCHENKO, VLADIMIR S. (Ed.); ARMANI, ANDREA M. (Ed.) SPIE PHOTONICS WEST; SPIE LASE, February 1-6, 2020, San Francisco, USA. Proceedings... Washington, USA: SPIE, 2020. p. 1126617-1 - 1126617-10. (Proceedings SPIE 11266, Laser Resonators, Microresonators, and Beam Control XXII). DOI: 10.1117/12.2545005

    Abstract: Diode-side pump Nd:YAG rod modules are widely available, reliable and commercially very attractive for building continuous-wave solid-state lasers in the 10-1000 W range. Newer technologies such as fiber or thin disk lasers are generally much more expensive but have the benefit of better beam quality and higher output powers if necessary. By using well-known techniques for designing dynamically stable resonators (DSRs), lasers with high extraction efficiency and high beam quality (fundamental mode, TEM00) can be obtained also with diode side-pumped modules. However, a successful project for a dynamic stable laser depends critically on the correct choice of the fundamental mode diameter within the rod. DSR design rules are based on the beam waist, w3, at the rod principal planes by considering the rod as a thin thermal lens, which differs significantly from real resonators. Here we give guidelines and criteria on how to establish the correct diameter in each case. Using off-the-shelf 75 W Nd:YAG modules it was possible to obtain linearly polarized TEM00-mode output of 30 W with M2=1.08 from a single module, M2=1.2 and 76.5 W of output power using two modules and 100.5 W of polarized, continuous output with M2=1.8. A single-frequency ring laser was also built, using two modules, generating 51.6 W of fundamental wave single-frequency output.

    Palavras-Chave: neodymium lasers; yttrium compounds; resonators; diode-pumped solid state lasers

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  • IPEN-DOC 26988

    GUERRERO-RASCADO, J.L.; ALADOS-ARBOLEDAS, L.; BENAVENT-OLTRA, J.A.; CAZORLA, A.; CHAMIZO, S.; FOYO, I.; GRANADOS-MUNOZ, M.J.; KOWALSKI, A.S.; OLMO, F.J.; PEREZ-RAMIREZ, D.; SERRANO-ORTIZ, P.; TITOS, G.; CASQUERO-VERA, J.A.; ORTIZ-AMEZCUA, P.; COSTA, M.J.; LOPES, F.J.S. ; LYAMANI, H.; PEREZ-PRIEGO, O.; PREISSLER, J.; MARTIN-TRIGO, O.. E-learning in the teaching-learning process at postgraduate level: application to geomet subjects. In: GOMEZ CHOVA, L. (Ed.); LOPEZ MARTINEZ, A. (Ed.); CANDEL TORRES, I. (Ed.) INTERNATIONAL CONFERENCE ON EDUCATION AND NEW LEARNING TECHNOLOGIES, 9th, July 3-5, 2017, Barcelona, Spain. Proceedings... Valencia, Spain: IATED Academy, 2017. p. 2699-2704. DOI: 10.21125/edulearn.2017.1561

    Abstract: This teaching innovation project arises from experience previously gained with other innovation projects encompassing several degrees with the aim of improving the academic performance of the students and the quality of teaching in several subjects of the Master’s program in Geophysics and Meteorology (GEOMET) at the University of Granada (Spain). Among other novelties, through this project resources have been developed for students to carry out an online self-assessment of their knowledge regarding contents of the different subjects through the Moodle platform, checking the level of skills acquired. In addition, the project includes a system of exchange of teaching, electronic resources between teachers and students (guides of subjects, viewgraphs, practical documents, among others). This platform has increased the coordination between the lecturers who teach the subjects.

    Palavras-Chave: e-learning; training; meteorology; computer codes

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  • IPEN-DOC 21507

    SCAGLIUSI, SANDRA R. ; CARDOSO, ELISABETH C.L. ; LUGAO, ADEMAR B. . Effect of gamma radiation on the mechanical and degradation properties of bromobutyl rubber compounds. In: CARPENTER, JOHN S. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO, JUAN P. (Ed.); HWANG, JIANN-YANG (Ed.); IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); LI, JIAN (Ed.); MONTEIRO, SERGIO N. (Ed.); PENG, ZHIWEI (Ed.); ZHANG, MINGMING (Ed.) CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS. 144th . ANNUAL MEETING & EXIBITION, March 15-19, 2015, Orlando, Florida. Proceedings... New York: Wiley , 2015, 2015. p. 1307-1316. DOI: 10.1007/978-3-319-48127-2_156

    Palavras-Chave: gamma radiation; 2-methylpropane; isoprene; rubbers; radiation effects; ionizing radiations; radiolysis; cross-linking

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  • IPEN-DOC 21952

    CAMPOS, REJANE D.; SOTENKO, MARIA; HOSUR, MAHESH; JEELANI, SHAIK; DIAZ, FRANCISCO R.V.; MOURA, ESPERIDIANA A.B.; KIRWAN, KERRY; SEO, EMILIA S.M.. Effect of mercerization and electron-beam irradiation on mechanical properties of high density polyethylene (HDPE)/Brazil nut pod fiber (BNPF) bio-composites. In: CARPENTER, JOHN S. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO, JUAN P. (Ed.); HWANG, JIANN-YANG (Ed.); LKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); LI, JIAN (Ed.); MONTEIRO, SERGIO N. (Ed.); PENG, ZHIWEI (Ed.); ZHANG, MINGMING (Ed.) CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS. 144th . ANNUAL MEETING & EXIBITION, March 15-19, 2015, Orlando, Florida. Proceedings... 2015. p. 637-644. DOI: 10.1007/978-3-319-48191-3_80

    Palavras-Chave: composite materials; mechanical properties; brazil; nuts; chemical preparation; irradiation; beams; electrons

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  • IPEN-DOC 26767

    LOPES, MONICA S.; MOTA, CLAUDIA C.B.O.; PEREIRA, DAISA L. ; AMARAL, MARCELLO M.; ZEZELL, DENISE M. ; GOMES, ANDERSON S.L.. Effect of Nd:YAG laser and aluminum oxide sandblasting preconditioning on lingual enamel: brackets shear bond strength and morphological characterization. In: WOJTKOWSKI, MACIEJ (Ed.); BOPPART, STEPHEN A. (Ed.); OH, WANG-YUHL (Ed.) EUROPEAN CONFERENCES ON BIOMEDICAL OPTICS, June 23-27, 2019, Munich, Germany. Proceedings... Bellingham, WA, USA: SPIE, 2019. p. 1107822-1 - 1107822-3. (Proceedings of SPIE-OSA Vol. 11078, Optical Coherence Imaging Techniques and Imaging in Scattering Media III). DOI: 10.1117/12.2527030

    Abstract: It is known that Nd:YAG laser radiation on dental structure can increase enamel resistance to demineralization; however, few studies report its impact in orthodontics. This study aimed to verify the interaction of Nd:YAG laser and aluminum oxide sandblasting (Al2O3) as preconditioning treatment of lingual brackets bonding to quantify the shear bond strength (SBS) and to characterize the enamel after different surface preconditioning techniques. Thirty-five bovines’ incisors were divided in 5 groups (n=7), according to the preconditioning. All groups had the lingual brackets bonded with Transbond XT adhesive according to manufacturer’ protocol, and shear bonded after 72h. Samples were analyzed by Optical Coherence Tomography (OCT) and Scanning Eletronic Microscope (SEM) to verify enamel alterations. Optical attenuation coefficient (α) was measured before any preconditioning (T0) and after preconditioning surface (T1) for each group. Statistics analysis ANOVA-test was used, followed by Post Hoc Tukey for shear bond strength data, and Kruskal Wallis and post hoc Dunn test for α data. SEM and OCT qualitative analysis showed the melting effect with laser irradiation and enamel crystal surface disorganization with sandblasting in T1 and after shear bond. All groups were adequate for SBS and the statistical differences (p=0.0034) among groups showed better results for groups with techniques association (laser and Al2O3 used in this or in reverse order) and the highest SBS when laser was used after. The Al2O3 removes part of melting effect. The α had statistical difference (p= 0.0124) among groups, increasing with laser and Al2O3 isolated and decrease with techniques association.

    Palavras-Chave: tomography; coherent radiation; aluminium oxides; oral cavity; dentistry

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  • IPEN-DOC 16354

    OLIANI, WASHINGTON L. ; FERMINO, DANILO M.; LIMA, LUIS F.C.P. de ; LUGAO, ADEMAR B. ; PARRA, DUCLERC F. . Effects of accelerated thermal aging on polypropylene modified by irradiation process. In: CARPENTER, JOHN S. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO, JUAN P. (Ed.); HWANG, JIANN-YANG (Ed.); IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); LI, JIAN (Ed.); MONTEIRO, SERGIO N. (Ed.); PENG, ZHIWEI (Ed.); ZHANG, MINGMING (Ed.) CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS. 144th . ANNUAL MEETING & EXIBITION, March 15-19, 2015, Orlando, Florida. Proceedings... New York: Wiley , 2015, 2015. p. 651-658. DOI: 10.1002/9781119093404.ch82

    Palavras-Chave: aging; polypropylene; thermal degradation; irradiation procedures; decomposition; gamma radiation; cross-linking; morphology

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  • IPEN-DOC 27079

    FERREIRA, EDUARDO ; VICENTE, ROBERTO ; TURRILLAS, XABIER; YOKAICHIYA, FABIANO; FRANCO, MARGARETH ; MARTINEZ, LUIS G. ; CARVALHO, ALEXANDRE; MARUMO, JULIO T. . Effects of gamma radiation on cementitious materials in repository environment. In: ANNUAL WASTE MANAGEMENT CONFERENCE, March 6-10, 2016, Phoenix, Arizona, USA. Proceedings... Tempe, Arizona, USA: Waste Management Symposia, 2016. p. 1-10.

    Abstract: Cementitious materials are widely used in the management of radioactive waste and have to perform as required for the period of service life of the installation. In order to assess the long term durability of cement paste in a deep borehole for radioactive wastes, specimens were casted in laboratory and exposed to a gamma radiation field. The effects of the radiation in the specimens were evaluated by X-Ray Diffraction, as changes observed in the mineralogy and microstructure of the material after irradiation doses varying between 0 (without radiation) and 10 MGy. It was observed that the specimens exposed to higher doses of gamma radiation (up to 3MGy) presented differences between surface and core, when compared with the samples with no radiation or exposed to low doses. These results are important to model the behavior of cementitious materials under the conditions expected in a borehole repository and to provide data for the safety assessment of the installation.

    Palavras-Chave: boreholes; cements; comparative evaluations; gamma radiation; microstructure; nuclear materials management; radiation doses; radioactive wastes; risk assessment; service life; wear resistance; x-ray diffraction

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  • IPEN-DOC 25943

    CONTATORI, CAROLINA G. de S. ; SILVA, CAMILA R. ; RIBEIRO, MARTHA S. . Effects of near-infrared low level laser irradiation on melanoma cells. In: COSTA-FELIX, RODRIGO (Ed.); MACHADO, JOÃO C. (Ed.); ALVARENGA, ANDRÉ V. (Ed.) BRAZILIAN CONGRESS ON BIOMEDICAL ENGINEERING, 26th, October 21-25, 2018, Armação de Buzios, RJ. Proceedings... Singapore: Springer Nature Singapore, 2019. p. 797-801. (IFMBE Proceedings, volume 70/2). DOI: 10.1007/978-981-13-2517-5_122

    Abstract: Low-level laser (LLL) therapy promotes biostimulating effects in cell cultures growing in nutritional deficit. However, the effects of LLLs on tumor cell lines remain controversial. Studies indicate stimulatory, inhibitory or even no influence in this type of cells. Therefore, the aim of this study was to evaluate the influence of LLL irradiation on the cell viability (with and without nutritional deficit) of human melanoma SKMEL 37 cells and murine melanoma B16F10 cells using an infrared laser (k = 780 nm) with different radiant exposures. The cell lines were subjected to the LLL 24 h after they were seeded in a 96-well plate at a density of 5 104 cells per well. The analysis of cell proliferation by mitochondrial activity occurred at intervals of 24 and 72 h after laser irradiation. At each time, culture medium was removed and 180 μL of PBS and 20 μL of MTT were added. The plates were incubated for 4 h and the absorbance was read in a microplate reader at 570 nm. Results showed a non-significant statistical difference among the groups for both cell lines regardless the nutritional medium. The metabolic pattern was similar among the groups. It is concluded that irradiation with 780 nm laser light at radiant exposures of 30, 90 and 150 J/cm2 and an output power of 40 mW does not promote cell proliferation on melanoma cell lines.

    Palavras-Chave: lasers; therapy; irradiation; laser radiation; melanomas; tumor cells; radiation doses

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  • IPEN-DOC 15931

    COURROL, L.C. ; LINHARES, H.M.S.M.D.; LIBRANTZ, A.F.H. ; BALDOCHI, S.L. ; GOMES, L. ; RANIERI, I.M. . Energy transfer rates of KYsub(3)Fsub(10):Yb:Nd:Tm crystals. In: NTERNATIONAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS, 16th, August 24-29, 2008, Aracaju, SE. Proceedings... 2008.

    Palavras-Chave: monocrystals; doped materials; thulium; ytterbium; absorption spectra; sample preparation; diode-pumped solid state lasers; luminescence; spectroscopy; energy transfer

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  • IPEN-DOC 16637

    OLIVEIRA, L.C.; KINOSHITA, A.; BARRETO, A.M.F.; FIGUEIREDO, A.M. ; SILVA, J.L.L.; BAFFA, O.. ESR dating of teeth from brazilian megafauna. In: NTERNATIONAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS, 16th, August 24-29, 2008, Aracaju, SE. Proceedings... 2008. DOI: 10.1088/1742-6596/249/1/012062

    Palavras-Chave: electron spin resonance; age estimation; teeth; fossils; sample preparation

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  • IPEN-DOC 22129

    FRANCO, EGBERTO G. ; LINARDI, MARCELO ; COLOSIO, MARCO A.. Ethanol fuel cell: new electrocatalysts systems. In: SAE BRASIL CONGRESS AND EXHIBIT; CONGRESSO E EXPOSICAO INTERNACIONAIS DA TECNOLOGIA DA MOBILIDADE, 14., 22-24 de novembro, 2005, São Paulo, SP. Proceedings... Warrendale, PA: SAE International, 2005. (SAE Technical Paper 2005-01-4078). DOI: 10.4271/2005-01-4078

    Abstract: Ethanol fuel cell has major drawbacks to be overcame. Electrocatalysts systems are one of the major concerns in the development of ethanol fuel cells. In this work we synthesized two different systems: PtRuDy and PtU. PtRuDy shows electroactivities similar to Pt3Sn, that is pointed out as the best catalyst for ethanol oxidation. PtU shows a promise result when operated with ethanol and after this with hydrogen and oxygen again. It is well established that electrocatalysts systems as PtRu when operated with alcohols these systems shows a huge degradation when operating with hydrogen again. PtRuDy system shows 46% of degradation while operating with ethanol and turning back to hydrogen. PtU system shows no degradation at all after operating with ethanol 1.0 mol L-1 and turning to hydrogen again.

    Palavras-Chave: fuel cells; electrocatalysts; ethanol fuels

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  • IPEN-DOC 22128

    BERENGUER, ISABELLE O. ; OLIANI, WASHINGTON L. ; PARRA, DUCLERC F. ; KOMATSU, LUIZ G.H. ; SANTOS, VINICIUS J. ; LINCOPAN, NILTON; LUGAO, ADEMAR B. ; RANGARI, VIJAYA K.. Fabrication of gamma-irradiated polypropylene and AgNPs nanocomposite films and their antimicrobial activity. In: CARPENTER, JOHN S. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO, JUAN P. (Ed.); HWANG, JIANN-YANG (Ed.); IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); LI, JIAN (Ed.); MONTEIRO, SERGIO N. (Ed.); PENG, ZHIWEI (Ed.); ZHANG, MINGMING (Ed.) CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS. 145th . ANNUAL MEETING & EXIBITION, February 14-18, 2016, Nashville, Tennessee, USA. Proceedings... New York: Wiley , 2016, 2016. p. 143-150. DOI: 10.1002/9781119274896.ch18

    Palavras-Chave: polypropylene; nanocomposites; silver; nanoparticles; silicon

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  • IPEN-DOC 16006

    SAMAD, R.E. ; COURROL, L.C. ; GOMES, L. ; RANIERI, I.M. ; BALDOCHI, S.L. ; FREITAS, A.Z. de ; VIEIRA JUNIOR, N.D. . Fluorescence properties of colour centres produced by ultrashort laser irradiation in LiF crystals. In: INTERNATIONAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS, 16th, August 24-29, 2008, Aracaju, SE. Proceedings... 2008. DOI: 10.1088/1742-6596/249/1/012009

    Palavras-Chave: fluorescence; color centers; laser radiation; lithium fluorides; crystals

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  • IPEN-DOC 18946

    ANDRADE-II, E.; MENEZES, J.C.M.; DUARTE, S.B.; GARCIA, F.; ROSSI, P.C.R.; TAVARES, O.A.P.; DEPPMAN, A. . Fragment mass distributions for heavy nuclei fission induced by intermediate energy probes. In: INTERNATIONAL NUCLEAR PHYSICS CONFERENCE 2010, July 4-9, 2010, Vancouver, Canada. Proceedings... 2010.

    Palavras-Chave: americium 241 target; comparative evaluations; compound nuclei; computerized simulation; experimental data; fission fragments; heavy ion reactions; mass distribution; monte carlo method; neptunium 237 target; nuclear cascades; photons; scission-point model; theoretical data; uranium 238 target; protons

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  • IPEN-DOC 27337

    SMITH, RICARDO B. ; TESSARO, ANA P.G. ; ROLINDO, NATALIE C. ; VICENTE, ROBERTO . Further analyses of the unburied Goiania Accident packages. In: ANNUAL WASTE MANAGEMENT CONFERENCE, 45th, March 3-7, 2019, Phoenix, Arizona, USA. Proceedings... Tempe, Arizona, USA: Waste Management Symposia, 2019. p. 1-7.

    Abstract: In 1987, in the city of Goiania, Brazil, a derelict teletherapy machine was disassembled by scavengers and Cs-137 was released in the environment, unleashing the biggest radiological accident in Brazil. During the 15 days before the accident was acknowledged, some contaminated materials were sold and delivered to recycling factories in a few cities in the state of Sao Paulo, Brazil, in the form of metal scrap and recycled paper bales. The contaminated material was then collected, the metal scrap was conditioned in forty-three 200-liter drums, and the paper bales were stored in fifty 1.6 cubic meter steel boxes at the interim storage of the Nuclear and Energy Research Institute (IPEN), in the city of Sao Paulo, and there remained ever since. In 2017, 30 years later, initial analyses were performed at a sample of these boxes, checking for their activity, weight, and incongruences between the original values recorded at the time of collection and the measurement results 30 years later. The results indicated that none of the boxes checked were close to the clearance limit and that, without any sort of treatment, this radioactive waste should be stored for at least 150 years more. Visual inspection could not be performed at that time. Nowadays, some of the boxes were opened and samples from the contaminated material inside were taken for analysis. The main objective of this work is to report the results from the evaluation of the physical state of this material. After these analyses, the treatment options for volume reduction that were previously proposed were reviewed, and the method that best suits the current characteristics of the waste was chosen.

    Palavras-Chave: cesium 137; environment; radiation accidents; radiation hazards; radiation protection; radioactive waste storage; radioactive wastes; radiotherapy; recycling; scrap metals; steels; urban areas

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  • IPEN-DOC 29153

    PENIN Y SANTOS, S.; CARVALHO, ELIAS F. . GHG emissions, present energies, future with storage: highlight for China, USA, and Brazil. In: INTERNATIONAL CONFERENCE ON HARMONICS AND QUALITY OF POWER, 20th, May 29 - June 1, 2022, Naples, Italy. Proceedings... Piscataway, NJ, USA: IEEE, 2022. DOI: 10.1109/ICHQP53011.2022.9808572

    Abstract: Before the previous 252 years almost all human tasks depended on human muscles. The steam engine accelerates the intensive use of natural resources and in this period the ppm of CO2 in the atmosphere increased by 48%. The population was 750-800mi. The rapid growth to 7.8 billion, now on much better terms including food, uses approximately 615 Exa Joules (EJ) to meet its needs in electricity, transport, heating and industries, as well as to produce food. To stop hazardous emissions, a radical matrix change is underway. Solar, wind and other renewable energy must replace fossil fuels while maintaining the quality of energy, especially electrical energy. This article addresses these issues.

    Palavras-Chave: greenhouse gases; sustainability; machinery; storage; energy sources; resources; power demand; carbon dioxide

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  • IPEN-DOC 16012

    SILVA, F.R.; MIRAGE, A. ; SANTO, A.M.E.; MARTIN, A.A.; BALDOCHI, S.L. . Growth and characterization of LiYF4:Er+3 fibers. In: INTERNATIONAL CONFERENCE ON DEFECTS IN INSULATING MATERIALS, 16th, August 24-29, 2008, Aracaju, SE. Proceedings... 2008. DOI: 10.1088/1742-6596/249/1/012044

    Palavras-Chave: crystal growth; lithium fluorides; erbium; fibers

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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.