Spiral Structure
Mostrando 1-12 de 50 artigos, teses e dissertações.
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1. Formation of Mo−Si−Ti Alloys by Self−propagating Combustion Synthesis
Test specimens with nominal compositions MoSi2, (Mo0.9Ti0.1)Si2, (Mo0.8Ti0.2)Si2, (Mo0.7Ti0.3)Si2, (Mo0.6Ti0.4)Si2, (Mo0.5Ti0.5)Si2 and (Mo0.4Ti0.6)Si2 were prepared by combustion synthesis. The combustion mode, propagation velocity of combustion wave, combustion temperature and product structure were investigated. Specimens MoSi2, (Mo0.9Ti0.1)Si2, (Mo0.8Ti0
Mat. Res.. Publicado em: 2015-08
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2. Fotometria, decomposição e correlações para galáxias espirais próximas do projeto GHASP / Photometry, decomposition and correlations for nearby spiral galaxies from the GHASP survey
The spiral galaxies still challenge the theories that try to explain how the universe has turned into what we see today. In particular, in the context of the hierarchical structure formation, it is difficult to understand how galaxies can be so similar, obeying such strict scaling relations, in spite of their distinct evolutionary histories. In order to clar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/10/2011
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3. Micromachined microwave planar spiral inductors and transformers
A new micromachined planar spiral inductor, with the strips suspended individually, has been fabricated in standard GaAs high electron-mobility transistor monolithic-microwave integrated-circuit technology through maskless front-side bulk micromachining. The electronic compatibility, the use of industrial integrated-circuit production lines, the straightforw
Publicado em: 2011
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4. Estrutura e funcionamento dos espermatóforos de Doryteuthis plei (Mollusca: Cephalopoda) e reavaliação da reação espermatofórica dos cefalópodes / Spermatophore structure and functioning in Doryteuthis plei (Mollusca: Cephalopoda), and a reappraisal of the cephalopod spermatophoric reaction
Male coleoid cephalopods produce elaborate spermatophores, which are transferred to the female during mating. These spermatophores are capable of functioning autonomously and extracorporeally, undergoing complicated changes during the so-called spermatophoric reaction, i.e., a complex process of evagination of the spermatophoric tunics and membranes that, ul
Publicado em: 2010
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5. The dynamics and structure of knowledge in open innovation: a case study in an open sources multinational / A dinâmica e a estrutura do conhecimento na inovação aberta: um estudo de caso em uma multinacional de open source
While companies compete directly in the same industry, this does not mean that innovate in the same way. With this the search for partnerships has been identified as a common practice among companies perceived as effective and internalization of R&D, strategic before, is giving way to new forms open collaborative. Understanding how companies manage the open
Publicado em: 2010
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6. O processo de democratização e a política externa mexicana de direitos humanos: uma análise ao longo de duas décadas (1988-2006) / The democratization process and the mexican external politics of human rights: an analyses trhough two decades (1988-2006)
This dissertation analyzes the links between Mexicos human rights foreign policy during Salinas, Zedillos and Foxs governments (1988-2006) and the democratization process that was also occurring in this same period, exploring the impact of the political transition on the changes that occurred in Mexican human rights foreign policy. Our hypothesis is that the
Publicado em: 2009
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7. Serpente em espiral (o movimento do erotismo em Avalovara) / Serpent in spiral (the eroticism movement in Avalovara)
This dissertation focuses on the reading and interpretation of Osman Lins novel Avalovara based on a universal literary theme human love -, following the clues left by the author in interviews and analyzing especially its poetic configuration in the narrative. Taking into consideration the intense sexual component of the novel, it studies the various aspects
Publicado em: 2009
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8. Modelo da galáxia utilizando contagens de estrelas no infravermelho / Galaxy model by using infrared star counts
The majority of first quantitative models for the structure of Galaxy used the star counts method to explore the most important galactic structure parameters as a whole. Some of the most important models owe to Bahcall \& Soneira (1980), the Besançon group (Robin \& Crezé (1986)), Wainscoat et al. (1992), Ortiz \& Lépine (1993), among others.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2008
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9. Morphology of the male genital organs in amazonian tucuxi (Sotalia fluviatilis) / Morfologia dos órgãos genitais masculinos do tucuxi amazônico (Sotalia fluviatilis)
Sotalia fluviatilis is endemic in Amazon region and the only Delphinidae living in freshwater. It is considered by IUCN as an insufficiently known specie (deficient data) and is included in CITES Appendices I as a threatened specie. Additionally, this species is currently hunted and used as bait for fishing practices of a catfish called piracatinga. Thus, al
Publicado em: 2008
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10. Correção logarítmica no potencial Newtoniano e sua aplicação a galáxias espirais
A well elaborated characterization of the masses of the galaxies is of basic importance to understand the formation and the evolution of the galaxies, as well as the Universe. The circular speed of the spiral galaxies is used to estimate the mass of the galaxies. The observacional data of the rotation curves exactly show that the circular speeds practically
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2007
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11. Tempo de Avalovara (as diferentes dimensões temporais no romance de Osman Lins) / The time in Avalovara: the diferent temporal dimensions in the Osman Lins´novel
The novel Avalovara (1973), by the Pernambucan writer Osman Lins (1924-1978), presents a complex elaboration of time as a narrative category, through the exploration of the art of narrative simultaneity. The plot, which mimics the movement of a spiral in the palindrome sator arepo tenet operates routes, makes various fictional temporalities coexist in the mo
Publicado em: 2007
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12. MBE growth and characterization of films SnTe layers and SnTe/Sn1-x EuxTe heterostructures on BaF2 / Crescimento por MBE e caracterização de filmes SnTe e heteroestruturas de SnTe/Sn1-x EuxTe sobre BaF2
This work presents a systematic investigation of structural and electrical properties of SnTe epitaxial films grown on BaF2 substrates, as well as a study of structural properties of Sn1-xEuxTe (0
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2005