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Search Results: 1 - 10 of 462012 matches for " Foga?a "
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On the existence of Korteweg: de Vries solitons in relativistic hydrodynamics
Fogaa, D. A.;
Brazilian Journal of Physics , 2007, DOI: 10.1590/S0103-97332007000100027
Abstract: we study the conditions for the formation and propagation of korteweg-de vries solitons in relativistic fluid dynamics using an appropriate equation of state. the kdv equation is obtained from the relativistic version of the euler and continuity equations.
A psicanálise na vida cotidiana com as crian as
Marcia Regina Fogaa
Pro-Posi??es , 2010, DOI: 10.1590/s0103-73072010000300016
Abstract:
Korteweg - de Vries solitons in relativistic hydrodynamics
D. A. Fogaa,F. S. Navarra
Physics , 2006, DOI: 10.1016/j.physletb.2007.01.001
Abstract: In a previous work, assuming that the nucleus can be treated as a perfect fluid, we have studied the propagation of perturbations in the baryon density. For a given equation of state we have derived a Korteweg - de Vries (KdV) equation from Euler and continuity equations in non-relativistic hydrodynamics. Here, using a more general equation of state, we extend our formalism to relativistic hydrodynamics.
Solitons in relativistic mean field models
D. A. Fogaa,F. S. Navarra
Physics , 2005, DOI: 10.1016/j.physletb.2006.07.002
Abstract: Assuming that the nucleus can be treated as a perfect fluid we study the conditions for the formation and propagation of Korteweg-de Vries (KdV) solitons in nuclear matter. The KdV equation is obtained from the Euler and continuity equations in nonrelativistic hydrodynamics. The existence of these solitons depends on the nuclear equation of state, which, in our approach, comes from well known relativistic mean field models. We reexamine early works on nuclear solitons, replacing the old equations of state by new ones, based on QHD and on its variants. Our analysis suggests that KdV solitons may indeed be formed in the nucleus with a width which, in some cases, can be smaller than one fermi.
Soliton propagation in relativistic hydrodynamics
D. A. Fogaa,F. S. Navarra
Physics , 2013, DOI: 10.1016/j.nuclphysa.2007.03.104
Abstract: We study the conditions for the formation and propagation of Korteweg-de Vries (KdV) solitons in nuclear matter. In a previous work we have derived a KdV equation from Euler and continuity equations in non-relativistic hydrodynamics. In the present contribution we extend our formalism to relativistic fluids. We present results for a given equation of state, which is based on quantum hadrodynamics (QHD).
Avan?os no uso de células-tronco em ortopedia
Cristante, Alexandre Fogaa;Narazaki, Douglas Kenji;
Revista Brasileira de Ortopedia , 2011, DOI: 10.1590/S0102-36162011000400003
Abstract: primordial cells or stem cells are multipotent undifferentiated cells with the capacity to originate any type of cell in the organism. they may have their origins in the blastocyst and thus are classified as embryonic, or tissues developed in fetuses, newborns or adults and thus are known as somatic stem cells. bone marrow is one of the main locations for isolating primordial cells, and there are two lineages: hematopoietic and mesenchymal progenitor cells. there are several uses for these undifferentiated cells in orthopedics, going from cartilaginous lesions in osteoarthrosis, osteochondritis dissecans and patellar chondromalacia, to bone lesions like in pseudarthrosis or bone losses, or nerve lesions like in spinal cord trauma. studying stem cells is probably the most promising field of study of all within medicine, and this is shortly going to revolutionize all medical specialties (both clinical and surgical) and thus provide solutions for diseases that today are difficult to deal with.
O ensino de línguas estrangeiras e a sociedade
Francisco Carlos Fogaa,Telma Nunes Gimenez
Revista Brasileira de Linguística Aplicada , 2007,
Abstract: Este trabalho tem por objetivo discutir a rela o entre o ensino de línguas estrangeiras e a sociedade, por meio de três tendências político-filosóficas: a) educa o como reden o, que vê a prática educacional como uma forma de redimir a sociedade de suas desigualdades; b) a vis o reprodutivista, que vê a educa o como forma de reproduzir as condi es de produ o da sociedade, mantendo suas desigualdades; c) a tendência transformadora, que entende que a educa o tem um importante papel político e transformador a partir das necessidades e desejos das classes dominadas, buscando sua emancipa o. Documentos oficiais como os Parametros Curriculares Nacionais e as Orienta es Curriculares Nacionais foram analisados para identifica o dessas tendências. Os documentos revelaram tra os das tendências redentora e transformadora, configurando os embates deflagrados por uma sociedade marcada por exclus o e diferentes interesses. This study aims at discussing the relationship between foreign language teaching and society through three political and philosophical approaches: a) education as the redemption of society, which sees it as a solution to all social inequalities; b) education as the as the reproduction of the social relations of production, which aims at keeping the status quo; c) a transformative approach to education, which attributes an important political and emancipatory role to education and takes into account the needs and ambitions of the dominated classes. This study analyzed some official documents issued by the Ministry of Education, which guide the educational process in this country, in the light of the three perspectives. The documents revealed traces of redemption and transformation as key elements in the learning/teaching of foreign languages, a result that translates the struggles of an unequal society.
Opera es de gênero: o filme XXY (2007) e a produ o do corpo e do sexo como “naturais”. Opera es de gênero: o filme XXY (2007) e a produ o do corpo e do sexo como “naturais” Gender operations: the film XXY (2007) and the constitution of the body and sex as “natural”.
Luciana Fogaa Monteiro,Henrique Caetano Nardi
Athenea Digital , 2009,
Abstract: Inspirados na concep o foucaultiana do corpo como superfície de inscri o da história e apoiados nas contribui es de Judith Butler acerca da materialidade dos corpos, o presente artigo trata de problematizar a forma como concep es normativas e binárias de gênero operam de forma a constituir um campo de inteligibilidade para os sujeitos e seus corpos. Para tanto, utilizamos como ferramenta de análise o filme XXY (2007), que conta parte da história e do drama de Alex, uma jovem intersexual. A proposta é, através da história de Alex, argumentar sobre como o gênero age no processo de naturaliza o dos corpos, definindo seus contornos e os limites de sua a o e seus prazeres. Desta forma, corpos e sujeitos que n o correspondem ao ideal normativo s o lan ados no domínio daquilo que Butler chamou de “corpos abjetos”. A idéia aqui é, através da história trazida pelo filme, entender como concep es amalgamadas do gênero operam tanto sobre corpos considerados “anormais” quanto os considerados “normais”, afetando a todos. Inspirados na concep o Foucaultiana do corpo como superfície de inscri o da história e apoiados nas contribui es de Judith Butler acerca da materialidade dos corpos, o presente artigo trata de problematizar a forma como concep es normativas e binárias de gênero operam de forma a constituir um campo de inteligibilidade para os sujeitos e seus corpos. Para tanto, utilizamos como ferramenta de análise o filme uruguaio intitulado XXY (2007), que conta parte da história e do drama de Alex, uma adolescente interssexual. A proposta é, através da história de Alex, argumentar sobre como o gênero age no processo de naturaliza o dos corpos, definindo seus contornos e os limites de sua a o e seus prazeres. Desta forma, corpos e sujeitos que n o correspondem ao ideal normativo s o lan ados no domínio daquilo que Butler chamou de “corpos abjetos”. A idéia aqui é, através da história trazida pelo filme, entender como concep es amalgamadas de gênero usam seu bisturi para operam tanto corpos considerados “anormais” quanto os considerados “normais”, afetando a todos. Based on Foucault’s concept of the body as the surface of inscription of history, and on the work of Judith Butler, this article questions the way that binary and normative conceptions of gender operate in the constitution of a field of intelligibility for subjects and their bodies. We analyse the film XXY (2007) that tells the story of Alex, an intersexual adolescent. We use the main character's story to see how gender norms act to shape bodies and limit their pleasures. We argue that subjec
Efeito do ácido tartárico nos valores de potássio, acidez titulável e pH durante a vinifica??o de uvas Cabernet Sauvignon
Daudt, Carlos Eugenio;Fogaa, Aline de Oliveira;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000800039
Abstract: wines with high ph values are usually made from grapes with high potassium values and can bring serious problems to the wine. this high potassium comes, usually, from mistakes with the vines management. while the right management has being tried, in the vineyard, and aiming to find a fast solution for the problem inside the winery a pilot scale fermentation was made with cabernet sauvignon. the must was submitted to three different treatments with tartaric acid: zero, 1gl-1 and 2gl-1,all in duplicate. the pattern of fermentation was the normal so2, pectinolitic enzymes and yeasts addition to the musts; skins and seeds were removed from the must after 10 days of fermentation and malolactic fermentation occurred spontaneously. potassium (by flame spectrometry), total acidity (by titulometry) and ph (by ph meter) were analyzed in the musts during fermentation and in the wines; skins and lees were digested previously the analysis. values found, in the wines, for potassium (gl-1), total acidity (g%) and ph were respectively: samples from zero tartaric acid 1,98, 0.61, 3,68; from 1gl-1:1,72, 0.70 e 3,63; from 2gl-1:1,41, 0,73 e 3,50. values found in the skins and lees with the same treatments were, respectively: 24,91 and 69.30, 21,85 and 75.11, 16,20 and 85.38g kg-1 of the dry matter. the effect of tartaric acid addition was noted mainly in the lees (69.3, 75.11 and 85.38), in which the potassium found showed a close relationship with the acid added in the must. it should be noted, though, that this addition is just for the moment because the real correction should be made in the vineyard, as it is now.
Potássio em uvas II: análise peciolar e sua correla??o com o teor de potássio em uvas viníferas
Fogaa, Aline de Oliveira;Daudt, Carlos Eugenio;Dorneles, Fabiane;
Ciência e Tecnologia de Alimentos , 2007, DOI: 10.1590/S0101-20612007000300026
Abstract: grapes from three vitis vinifera varieties (pinot noir, cabernet sauvignon and merlot) were analyzed over a two-year period to determine their potassium content, aiming to monitor this mineral content during the ripening process and evaluate its influence on ph values. grape samples were harvested periodically during the berries? development until their harvest. as expected, the grapes? potassium content showed variations, i.e., high potassium content went hand-in-hand with increased ph values while low potassium content led to stabilized ph; this process was also affected by the decline in total acidity. this finding confirms that high ph values, low titrable acidity and potassium are correlated. in addition, the analysis of petiole samples (collected during inflorescence and 30 days later) proved to be an efficient tool not only for monitoring the potassium content in winegrapes but also for evaluating the need for soil amendments involving this mineral. the potassium content in petioles and in winegrapes was found to be directly correlated; therefore, this method may be useful in future diagnoses of the potassium content in grapes and wines.
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