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Formação de acetato de etila a partir do etanol sobre catalisadores de Cu/ZrO2: efeito da carga de cobre nas propriedades físicas e catalíticas
(Universidade Federal de São Carlos, 2010-03-10)
Freitas, Isabel Cristina de
;
Bueno, José Maria Corrêa
;
https://lattes.cnpq.br/0157452280626031
;
https://lattes.cnpq.br/9861067651401873
The ethanol dehydrocoupling in ethyl acetate distinguishes among the reactions of alcohol transformation in products with higher added value. Due to the possibility of obtaining ethanol from biomass in Brazil, the production of ethyl acetate is of great interest, being their production very economical. The ethanol dehydrocoupling in ethyl acetate was studied over Cu/ZrO2 catalysts prepared by impregnation method followed by calcinations in air. The samples with different Cu loadings were characterized by thermal analyze, X-Ray powder diffraction, determination of the specific surface area, temperature-programmed reduction (TPR), decomposition of N2O and X-Ray photoelectron spectroscopy (XPS). TPR results showed the formation of low temperature reduction Cu species (peaks α1, α2 e β) predominant at low loadings of supported Cu in ZrO2, these species are attributed to CuO highly dispersed on support. The increase of Cu loading caused the formation of CuO bulk species with high temperature reduction (peaks γ1 e γ2). XPS results for Cu/ZrO2 reduced catalysts showed that an increase in the Cu loading caused a shift in the Cu 2p3/2 peak to regions of lower biding energy. The spectra of Cu Auger region suggest that a decrease in the Cu loading increases the ratio of Cu+/Cuo species. Catalytic tests for dehydrocoupling reaction of ethanol were carried out at atmospheric pressure and showed an increasing activity per Cu site for ethyl acetate formation with the increase in the dispersion of supported Cu. Furthermore, the by-products formation due the acetaldehyde via aldol condensation occurs on the ZrO2 support surface. Also, it could be seen that catalysts with Cu loading up to 20% showed an increase in the ethyl acetate selectivity with an increase in the Cu loading. This can be attributed to the higher ZrO2 coating by active phase providing the suppression of by-products that are formed via aldol condensation.
Max Weber e o problema da dialética: presença do idealismo na formação dos tipos ideais
(Universidade Federal de São Carlos, 2010-03-10)
Roselino, Luis Felipe Martins de Salles
;
Maar, Wolfgang Leo
;
https://lattes.cnpq.br/8746615407370574
This work has the dialectics as its main theme and aims to present Max Weber s thought before the legacy of German idealism, i.e., by the particular way that Hegel (as much as Marxism) has defined dialectics in history. Dialectics will be investigated inside Max Weber s historical typologies as a product of history and reason together. We serve ourselves of two histories of philosophy, that of the Windelband and of Lukács, and from those two perspectives our object is approached by a philosophical as well as a historical and sociological perspective. Thus, we shall observe how the uses of Weber s types are immerged inside the same limits and philosophical legacy of Kant and Hegel.
Práticas instituintes e experiências autoritárias : o sindicalismo rural na mata pernambucana, 1950-1974
(Universidade Federal de São Carlos, 2010-03-10)
Koury, Mauro Guilherme Pinheiro
;
Silva, Maria Aparecida de Moraes
;
https://lattes.cnpq.br/6792025643983370
;
https://lattes.cnpq.br/2257639640736774
This thesis makes a social history of the organizational process of rural syndical movement in Brazil, with analytical focus in the Zona da Mata of Pernambuco. It has as objective to understand the instituting process of social and syndical rural movements in the region, and its historical formation, organization and consolidation, between 1950 and 1974. In this direction, he looked for to apprehend the dynamics of the social and political nets, that made to appear a new process in Brazil from the 1950 , where rural workers, as new actors, enter in the scene politics in search of citizenship and social inclusion; and the dynamic of the left parties interested and engaged in the practical organizational of rural man and its relations with institutional forces of the State and the Church. In the end, this study argues the practical instituting process for inside and outside of rural syndical organization in Brazil and, mainly, in the mata pernambucana, after-1964, and its relations with the Brazilian authoritarian state and the authoritarian experiences produced in this relation, with the ideological version of creation of a syndicate of associates.
Morro da Conceição: uma etnografia da sociabilidade e do conflito numa metrópole brasileira
(Universidade Federal de São Carlos, 2010-03-10)
Costa, Flávia Carolina da
;
Toledo, Luiz Henrique de
;
https://lattes.cnpq.br/3624633716376418
Morro da Conceição is located in the quarter of Saúde, the port area of Rio de Janeiro, and is an important historical site in the city that currently presents a special case of territorial dispute between a group of residents who self-recognized as Black Community of the Pedra do Sal and a religious order called Venerável Ordem Terceira de São Francisco da Penitência - VOT. Based on ethnographic research done at 2008 year, we tried to understand how were organized networks of sociability among inhabitants in the context of territorial dispute. During the ethnographic excursion, other relationships were being revealed in the everyday practices. From an intricate mesh of sociability that mixed interests and agents, a detailed thread conflict was being discovered. The ethnographic experience allowed us to see that the problems involved in the discourses and projects of revitalization of port area affected the territory, letting observe endeavor to keep its symbolic and spatial diversity. Thus, conflicts appeared as constituting sociability and were mixed in the most usual relations. Analyzing the brazilian context concerning Black Communities is possible to understand the construction of social networks and political representations. The sociability‟s studies revealed the Morro da Conceição as a singular space that transits between being city and being slum .
Exercício aeróbico e suas implicações no crescimento e metabolismo de pacu (Piaractus mesopotamicus)
(Universidade Federal de São Carlos, 2010-03-10)
Hackbarth, Araceli
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Moraes, Gilberto
;
https://lattes.cnpq.br/4427903557163246
;
https://lattes.cnpq.br/3171356543040552
Fishes as well as other group of species can accrue benefits from adapting to aerobic exercises. Examples of these benefits are: higher growth and feed conversion rates, less aggressive behavior, and optimization of non-nitrogenous nutrient as source of metabolic energy. The aim of this work was to evaluate growth and metabolic responses of pacu (Piaractus mesopotamicus) to aerobic swimming speeds and diets, varying in proportions of carbohydrates and lipids. Two experiments were carried out. One of it aimed to determining the ideal aerobic swimming speed for pacu; three speeds were compared: 1 body-length per second (BL/sec), 2 BL/sec, and 3 BL/sec besides a control treatment (non-exercised). In the second experiment the fish were kept at non-exercising or swimming at the ideal speed determined in the previous experiment, and submitted to different feeding regimes, in which the diets presented varying proportions (%) of carbohydrate and lipid, respectively: 27/15, 36/10 and 45/5. In both experiments, treatment effects were evaluated in terms of zootechnical parameters, several hematological variables, and intermediary plasmatic, hepatic and muscle tissue (white and red) intermediary metabolites and several metabolic enzyme activities. It was concluded from the first experiment that swimming at 2 BL/sec was ideal for pacu, considering the comparatively higher rate of growth and a metabolic response indicative of a higher utilization of non-protein sources for energy production. The spare-protein effect was also observed under the 1 and 2 BL/sec treatments while higher levels of protein oxidation, possibly for the maintenance of energy levels, and adequate levels of glycemia were observed in the individuals kept swimming at 3 BL/seg. In the second experiment, the best growth rates were presented by swimming fishes kept under the 36/10 feeding regime; a higher participation of lipids as metabolic energy supplier was also noted under this regime. It was concluded that pacu submitted to aerobic swimming at 2 BL/sec and fed with diet containing 36% lipids and 10% carbohydrates presented better growth performance and higher efficiency in directing non-protein sources for metabolic energy production.
O papel pedagógico do tutor de EAD : uma abordagem bibliométrica baseada no banco de teses da CAPES
(Universidade Federal de São Carlos, 2010-03-10)
Furquim, Leila Aparecida Corte Volpini
;
Hayashi, Carlos Roberto Massao
;
https://lattes.cnpq.br/9136586124586219
;
https://lattes.cnpq.br/3729769320853992
This study has the purpose to analyze the tutor role on the conception of different authors and the defended Dissertations and Thesis on the Postgraduate programs in the country available at Thesis Database Capes. This new reality shows, initially, that the distance education promises to be based in interpretative, qualitative, descriptive and subjective investigations, with explicit values, fundamentally on reality, to promote the discovery and knowledge exploration. We also propose, therefore, to verify that this role is attributed to the tutor of distance education on thesis and dissertations developed on the Postgraduate programs in Brazil. By the methodological point of view the study consists of the following fases: a) Constitution of the research theory-methodological referential, through an explanation about the distance education, its importance in teacher education and professional. The methodological referential will embrace the bibliometric approach. b) Data collecting on the Thesis Database Capes, to identify the scientific production in distance education, focusing on the tutor role of distance education. c) Description and categorization of the data collection using automatic tools for the construct scientific production indicators. d) Analysis and interpretation of the results through of the bibliometric approaches and the theoretical research. The results of this research shows that the tutor, this new kind of professional, needs differential abilities, cognitive, interpersonal, dialogic and technical, acting with technique and pedagogic ability the mediation role, of fundamental relevance, on the construction of the meaningful learning and collaborative of distance education. Therefore, with this work we have contributed to the Education Area through the systematization of the reflections and ideas about the pedagogic role of the tutor of distance education.
Preparação de nanofibras de celulose a partir de fibras de curauá para desenvolvimento de nanocompósitos poliméricos com EVA
(Universidade Federal de São Carlos, 2010-03-10)
Corrêa, Ana Carolina
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Mattoso, Luiz Henrique Capparelli
;
https://lattes.cnpq.br/5839043594908917
;
https://lattes.cnpq.br/3369858890068027
The objective of the current project was the obtainment of cellulose nanofibers from curaua fibers and their application on the development of polymeric nanocomposites with EVA. A study of cellulose extraction according to the pre-treatment of the curaua fibers (mercerization with 5, 10, 15 and 17.5% NaOH solutions), acid solution used in acid hydrolysis (sulfuric (H2SO4), hydrochloric (HCl), and a mix of them (2:1 v/v)) and temperature of hydrolysis (45oC e 60oC) was carried out. Morphological analysis presented nanofibers with needle-like morphology, and similar lengths and diameters. It was noticed that the addition of hydrochloric acid to promote hydrolysis improved thermal stability of nanofibers, if compared to those hydrolyzed with sulphuric acid only, independent of fibers pre-treatment of the fibers. Nanocomposites and composites were prepared with EVA and nanofibers or mercerized fibers, with 1, 3, 5 and 7 wt% of nanofibers and 1-30 wt% of mercerized fibers, to evaluate the effect of concentration and reinforcement of nanofibers on composites properties as compared with micrometric scale fibers. The extrusion process, to incorporation of nanofibers in EVA matrix, was not enough to disperse and break of clusters of nanofibers down, which behaved as micrometric particles with low aspect ratio, but they were well adhered to the matrix, even without the use of compatibilizers. Mechanical properties of the nanocomposites presented a small increase in elastic modulus with a decrease in strain at break. For composites with mercerized curaua fibers, the extrusion process presented good fiber dispersion. The composites showed an increase on mechanical properties, mainly elastic modulus, with the increase of fiber content, greater than 7%, but with no significant changes in thermal properties.
No altar e na sala de aula : vestígios da catequese e educação franciscanas no sudeste goiano (1944-1963)
(Universidade Federal de São Carlos, 2010-03-11)
Barros, Aparecida Maria Almeida
;
Bittar, Marisa
;
https://lattes.cnpq.br/1742823730701223
The survey, whose object throve institutional relations of church and society mediated by education, aimed to examine the remains of catechesis and education materialized in the Franciscan parish schools established in Goias in the first half of the twentieth century. These institutions intregraram Franciscan missionary project of two American religious orders: the Friars Minor (1944) and the Sisters of Allegany (1946). The theoretical assumptions of cultural studies and historical research located in the field of educational institutions guided search fundamentals. The research methodology documentation, which was essentially the basis for the analysis of empirical data. The specific object of catechesis, education and society, had the contribution of sociological theory and historical interpretation for the variables of social and economic context in which they entered the missionary and educational analyzed. Among the findings from the route and analysis, remains indicated that the Catechesis and Education Taught at the altar and in the classroom, they would have supported the project of evangelization and sacralization, strengthening the movement for renewal of the Roman Church and the new Christianity in Brazil . Uniquely, the consolidation of the Franciscan missionary work led to the syncretism of religious practices and the likely eclecticism of pedagogical practices and school strongly marked by active methods, in contrast to the structure and format of traditional religious order. The originality with the Franciscans not only spread their missionary project also defined as agreements and mediations with local realities, through the educational and catechetical work, resulted in the demarcation of spaces and competitors alike and the coexistence of the diverse.
Ciclos de greves : o peso da variável salário na literatura internacional e nacional de greves
(Universidade Federal de São Carlos, 2010-03-11)
Ponce, Pedro Augusto
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Noronha, Eduardo Garuti
;
https://lattes.cnpq.br/6908348693613769
;
https://lattes.cnpq.br/8602386970247101
This research continues the study of strikes and collective action in Brazil. From the conception that the strikes have a cyclical character, determination of complex and changeable, this study shows the weight that the variable pay - traditionally seen as the main determinant of strikes - has in determining the conflict at different times given. The salary issue is in Brazil and the world's central theme of labor relations, but is not, in most cases, the main determinant of the phenomenon striker. In the theories of collective action and strikes a set of variables competes in explanatory power. In Brazil, for example, from the inaugural 1978 strikes, most of the demands of national strikes have been directly or indirectly pay, it does not presume that only wages could explain the reduction or expansion in the number of strikes. Through a mapping of national and international discussion of the topic and theoretical and methodological assumptions that guide this work, we try to compare the weight given to variable pay relative to other explanatory variables such as inflation and unemployment in determining the conflict industrial. To achieve this purpose, is part of the main explanations of cycles European, American, Latin American and national strikes, the authors grouped according to year and location of the debate. But this general observation hides different approaches that establish causal relationships or no causation between the variables considered. Thus, the American model said the strikes fall when unemployment is rising which is not shown to be true for Europe. On this continent, the wages seem to figure in the background, sometimes as a result of unemployment, as shown by the Danish case. In Brazil noted that the wages figured in the foreground and led to the outbreak of strikes in 1978 does not mean that they explain, by itself, the expansion or reduction of labor.
Os gêneros do discurso e a prática da produção textual: dialogando sobre os conhecimentos necessários aos educadores dos anos iniciais do ensino fundamental
(Universidade Federal de São Carlos, 2010-03-12)
Garcia, Stella de Lourdes
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Reyes, Cláudia Raimundo
;
https://lattes.cnpq.br/1903278004759421
The aim of this research was to verify and analyze which skills are necessary to the educators of 9-year-old pupils at the discourse genres as a teaching subject so that they can guarantee the pupils learning regarding the textual production which covers beyond the genre marks, i.e. the elements which ensure the discourse dynamics. Such skills were approached during an Extension Course in a dialogic collaborative process between researchers and educators, which was grounded in the development of a didactic sequence for the teaching of the writing discourse genre. It is an investigation of qualitative nature based on the dialogic collaborative methodology. The data collection was carried out during a continuing education course attended by educators and pupils from a municipal public school in São Carlos-SP which integrates the Project Learning Communities: betting on the learning quality, differences equality and democratization of the school management . We adopted a language conception which is constitutive of the individuals and used the studies by Freire, Bakhtin and researchers such as Schneuwly and Dolz as guidance. The data analysis, which was orientated by the assessment of themes present in the meetings with the educators as well as in the meetings with a third-year group of pupils, led us to conclude that the knowledge basis about teaching, more specifically the one regarding the knowledge of specific contents which refer to the discourse genres of the educators was not enough to guarantee that the discourse genres were conceived as a teaching subject. Although they were present in the classroom in reading activities, such a fact did not guarantee that the pupils appropriated them and started to produce them textually. As for the knowledge built during the education course, we believe that the reflections provided by the dialogic collaborative dynamics might have contributed to a change in the practice of the educators in question. We highlight the importance of the definition of the genre to be apprehended by the pupils, as well as the need to contextualize the writing process in an interlocutive situation, i.e. the pupils need to know what, why, how and to whom they write. Therefore, we can claim that using the didactic sequence to a writing genre teaching worked as instrumental to both the educators and the pupils. As for the educators, it provided methodological guidance to the systematized teaching of a writing discourse genre, thus contributing to the construction of a teaching knowledge basis; as for the pupils, it provided them with writing assurance, since they could learn and experience the knowledge and procedures which the textual production practice entails, taking into account the characteristics of the genre and the interlocutive situation.
Efeito da ovariectomia e treinamento de força no conteúdo lipídico no músculo esquelético, fígado, coração, depósitos de gordura e perfil lipídico
(Universidade Federal de São Carlos, 2010-03-12)
Leite, Richard Diego
;
Perez, Sergio Eduardo de Andrade
;
https://lattes.cnpq.br/9408953831211309
;
https://lattes.cnpq.br/9102502940689012
The aim of the present study was to investigate the effects of resistance training on skeletal muscle lipid content, liver lipid content, heart lipid content, fat depots and lipid profile in ovariectomized rats. Wistar adult female rats were grouped into: sedentary (Sed-intact); ovariectomized sedentary (Sed-Ovx); strength trained (ChronicEx-intact) and ovariectomized strength trained (ChronicEx-Ovx) (n= 10 per group). A 12-week strength training period that consisted in climbing a 1.1-m vertical ladder with weights attached to rats tail was used. The sessions were performed once every 3 days with 4-9 climbs and 8-12 dynamic movements per climb. Ovariectomy increased liver lipid content, fat depots, heart and muscle lipid content. There was an increase in atherogenic index and negative change in lipid profile due to ovariectomy. Resistance training decreased lipid content in liver, soleus, tibialis anterior, fat depots (mesenteric and retroperitoneal) and lipid profile, independently of ovarian hormone status. These results indicate the potential benefits of resistance training as an alternative strategy to control the effects of ovariectomy on fat depot, lipid profile, and tissue lipid content.
A educação na trajetória intelectual de Arthur Ramos: higiene mental e criança problema (Rio de Janeiro 1934-1949)
(Universidade Federal de São Carlos, 2010-03-12)
Garcia, Ronaldo Aurélio Gimenes
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Ferreira Junior, Amarilio
;
https://lattes.cnpq.br/0748545841167046
;
https://lattes.cnpq.br/9007404555091852
In this research we look for to critically reconstitute the paper of the education in the intellectual trajectory of Arthur Ramos. This author carried through an intense work of research and developed practical actions throughout its professional and academic experience. Ramos elaborated a theory of psychoanalysis base and humanist who resulted in an important set of concepts, proposals and social intervention that surpassed the limits of the school to reach the family and the community as a whole, extending in such a way the proper concept of education. The intellectual mentioned one was collaborator of Anísio Teixeira in the reform of public education next to the Department of Education of the Federal District during the administration of mayor Pedro Ernesto Batista in the decade of 1930. As part of the reform of Anísio Teixeira the Service of Ortofrenia and Mental Hygiene commanded by Ramos was installed. The objective to receive the children who were considered as incapable to learn and who presented a misadjusted behavior directed from the public school. It enters the objectives of the present research we can detach: to present Arthur Ramos as an intellectual of its time, involved with the controversies of its time in the interior of the field and thinking about forms of overcoming of the educational and social quandaries of the nation under the prism of the humanism and the democracy; to analyze its pedagogical proposals and of intervention in the school by means of the mental hygiene; to referential the child concept problem and to analyze its workmanship of scientific spreading Spirit Health of the 1939. The reverential theoretician methodology had been used the patrimonialism concepts, of authoritarian modernization, of intellectual field and habitus. The developed research search to use of the analysis of the intellectual production and the practical politics of Arthur Ramos from some documentary sources as published workmanships, periodic and manual assays, scientific articles in of spreading. Everything indicates that the proposals of Arthur Ramos were beyond the historical possibilities of the decades of 1930 and 1940. The work of the alagoano doctor of undeniable pioneers in the field of the applied psychoanalysis and the anthropology to the education was not enough to hinder that its accomplishments were condemned to the intellectual ostracism the one that had been deliver during many decades. The rescue of the thought and the practical one of Ramos is a form to retake the memory intellectual of that historical period especially of the field of the knowledge of the history of the education.
Estudos de separação enantiosseletiva para uma série de sulfóxidos quirais em colunas poliméricas
(Universidade Federal de São Carlos, 2010-03-12)
Lourenço, Tiago de Campos
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Cass, Quezia Bezerra
;
https://lattes.cnpq.br/9197210255594409
;
https://lattes.cnpq.br/7899438213629513
The liquid chromatography enantiomeric separation of a series of seventeen chiral sulfoxides was systematically investigated using multimodal elution with the new synthetic polymeric stationary phases based on monomers N-(2- acryloylamino-(1R,2R)-cyclohexyl)-acrylamine (P-CAP®), N,N0-[(1R,2R)-1,2- diphenyl-1,2-ethanediyl]bis-2-propenamide (P-CAP-DP®) and trans-9,10-dihydro- 9,10-ethanoanthracene-(11S,12S)-11,12-dicarboxylic acid bis-4-vinylphenylamide (DEAVB). The sulfoxide series was composed of aryl alkyl sulfoxides, benzoimidazole sulfoxides and the drugs modafinil, albendazole sulfoxide, omeprazole, lansoprazole, pantoprazole and rabeprazole. This work examines the effectiveness of the polymeric chiral stationary phases for the separation of chiral sulfoxides and describes the superiority of DEABV for these separations in three different elution modes. The first ever reversed phase enantiomeric separations on these columns is demonstrated. Besides that, the use of non standard chromatography solvents was evaluated for the sulfoxides series on the polymeric stationary phases. The study of the development of polysaccharides chiral stationary phases (CSPs) immobilized on to aminopropilsilica was carried out using thermal or photochemical methods. The photochemical method was more effective and provided the production of a CSP based on amilose tris-3,5- dimethylphenylcarbamate (CSP 7). This column showed stability for non standards mobile phases; however, has showed low enantiorresolution power for the compounds investigated. Using the photochemical approach an amilose tris-3,5- dimetoxiphenylcarbamate (CSP 8) was also prepared. The immobilization conditions needs, however, futher investigations and these results will be also presented and discussed in this work.
Tensão e extensão: ensaio sobre a ontologia bergsoniana
(Universidade Federal de São Carlos, 2010-03-12)
Henriques, Fernando Meireles Monegalha
;
Marques, Silene Torres
;
https://lattes.cnpq.br/4822141288006918
;
https://lattes.cnpq.br/6598854428295430
In this work, our aim is to show how Bergson s consciousness analysis is linked to his ontology. For that, we will begin with an analysis of temporal dimensions that are implicit in the idea of duration. Then, we will approach the idea that Bergson thinks our consciousness as a temporal field within past, present and future are linked. From there, we will try to show that this temporal field acknowledges several levels, as he put forward by his degrees of duration s theory. Thereafter, we will be ready to display the internal link between temporality and ontology according to Bergson, insofar our consciousness will be, for the French philosopher, just one of varied levels composing real s internal structure, insomuch other degrees of duration can be thought being high or low from this average temporal degree that our subjectivity is. Low: minimal temporality of our own body and lowermost duration of the matter. High: the concretion of duration or eternity of life , which is going to be called God by Bergson. In all these cases, the point is to think in duration, that is, to think varied strata of real by their temporal features, defining their respective places in a sole temporal structure, that we can go through by our own being s immanent intuition, in a movemente which Bergson will assert to be the metaphysics itself . These varied degrees of duration, in turn, will reveal being in a reverse relation to the consciousness extension: the bigger the past contraction made by our consciousness, that is, the bigger its intensity, the lesser its extension in the world. We will attempt to show that this idea of a reverse relation between the duration degrees and extension ones permeates a large part of Bergson s work, and it is very helpful in order to make Bergson s work clearer. Finally, our aim is to show how Bergson thinks his ontology from a genetic point of view: for that, we will elucidate what the concept of vital impulse hides and we will understand what the singular procession presented by Bergson in the third chapter of Creative Evolution consists of.
Concretos refratários avançados com alto teor de carbono
(Universidade Federal de São Carlos, 2010-03-12)
Luz, Ana Paula da
;
Pandolfelli, Victor Carlos
;
https://lattes.cnpq.br/7369376873984839
;
https://lattes.cnpq.br/3470395641242374
Refractory castables in the Al2O3-SiO2-SiC-C system are applied in the iron making process, including runners for molten slags and metals. Over the past years, several attempts to increase the carbon content of these materials have been performed, aiming to attain good performance when in contact with slags and bath, due to the low wettability of the carbon particles. However, carbon is highly vulnerable to oxidation. Therefore some actions, such as the use of antioxidants, are necessary to keep this element in the refractory microstructure during service. In this work the main objective is the design and development of castable formulations in the system Al2O3-SiO2-SiC-C containing 7 and 10 wt% of a mixture of carbon sources (pitch, coke and carbon black). Besides that, the evolution of the refractories reactions, associated to the use of one of the following antioxidants (Si, B4C and sodium borosilicate glass) or their combination, was investigated by several experimental and practical (i.e. application of one composition on a tilting runner in a metallurgical company) tests and by the thermodynamic simulations developed in the FactSage® software. The wettability technique, using the sessile drop method, was also applied in the evaluation of the interactions between slags and the castables. It was verified that the combined use of three antioxidants resulted in lower oxidation and excellent thermo-mechanical properties for the designed castables. However, when one of the compositions were applied in a tilting runner equipment, a superior mass loss was observed due to the refractory peeling. The excessive sintering of some parts of the castable (and the chemical corrosion at the contact with molten metal/slag led to the wearing of this material. Additionally, thermodynamic calculations pointed out that the Al4O4C, Al2OC, TiO2, and other antioxidants are good options for the refractory system investigated in this work.
Regressão de dados binários : distribuição Weibull
(Universidade Federal de São Carlos, 2010-03-12)
Caron, Renault
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Campos, Adriano Polpo de
;
https://lattes.cnpq.br/4867996651212204
In this work a new class of models for binary data based on Weibull distribution is introduced. A review is made of the most known linkage functions. This class of models has as special case the complementary log-log model and approximates well the logit and probit models. Three real data sets are given to compare the proposed model with many others. In one of these data sets the model is extended to allow multinomial data, that is, a discrete variable with more than two outcomes. The results are very good, because the estimation of parameters is quite simple and the model has shown to be very eficient.
Atividades para aprendizagem do conceito matemático de função
(Universidade Federal de São Carlos, 2010-03-12)
Guimarães, Rita Santos
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Paterlini, Roberto Ribeiro
;
https://lattes.cnpq.br/6240750958932738
The choice of the mathematical content of this work came from the identification of the difficulties of students in High School 1st year with the theme functions through the experiences of this researcher in her teaching practices. In order to facilitate the teaching and learning of the mathematical concept of function, some proposed activities mixed scripts and problems, to use the concept of spontaneous relationship as the basis for the construction of the scientific concept of function. The activities also have the language necessary for basic scientific understanding of the concept that we use to situations of perceived patterns for students to build functions represented by formulas. We explored the transition from discrete to continuous and covered some graphical situations for functions. The activities were settled in small groups of students from two schools in the first year of High School, one public and thr other on a cooperative style. Applications took a week in each school. All data collected were analyzed and compared with the previous observations, following Didactic Engineering as research methodology. So we could reformulate some parts of the sheets of activities to obtain more positive results of its application. We found that these dynamics in general stimulated and encouraged the participation of students in their own learning process. As it was not possible to follow any longer the same class, this prevented us from obtaining more precise information on the effects of the activites. Anyway, we believe that the produced material produced can help other professionals, even if they have to suffer minor changes to be compatible with each situation.
Efeitos da ovariectomia e treinamento resistido na atividade da metaloproteinase-2 no tendão calcâneo de ratas
(Universidade Federal de São Carlos, 2010-03-12)
Pereira, Guilherme Borges
;
Perez, Sergio Eduardo de Andrade
;
https://lattes.cnpq.br/9408953831211309
;
https://lattes.cnpq.br/0159911069166581
Tendons remodeling relies upon extracellular matrix restructuring by the matrix metalloproteinases (MMPs). The aim of this study was to investigate MMP-2 activity in different regions of the calcanear tendon after resistance training in ovariectomized rats. Wistar adult female rats were grouped into: sedentary (Sed-Intact); ovariectomized sedentary (Sed-Ovx); acute exercise (AcuteEx-Intact); ovariectomized acute exercise (AcuteEx-Ovx); resistance trained (ChronicEx-Intact) and ovariectomized resistance trained (ChronicEx-Ovx) (n= 10 each group). The resistance training protocol required the animals to climb a 1.1-m vertical ladder with weights attached to their tail was used. The sessions were performed once every 3 days with 4-9 climbs and 8-12 dynamic movements per scaling. The acute groups performed one session, and the chronic groups underwent a 12-week of resistance training. There was an increase in total MMP-2 activity in Sed- Ovx, AcuteEx-intact and ChronicExintact compared with Sed-Intact in the proximal region of calcanear tendon. AcuteEx-Ovx exhibited higher total MMP-2 than Sed-Ovx and AcuteEx-Intact in the distal region of calcanear tendon. Chronic-Ovx presented lower total MMP-2 activity than Sed-Ovx and Chronic-Intact in the distal region of tendon. The active MMP-2 was higher for the AcuteEx- Ovx than Sed-Ovx and AcuteEx-Intact in proximal region of tendon. There was higher active MMP-2 in the distal region of tendon in the Acute-Ovx than Sed-Ovx and AcuteEx-Intact. Ovariectomy and resistance exercise modulate MMP-2 activity according to specific tendon region, indicating a differentiated tissue remodeling.
Logaritmos no ensino médio: construindo uma aprendizagem significativa através de uma sequência didática
(Universidade Federal de São Carlos, 2010-03-12)
Rossi, Patrícia Rodrigues da Silva
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Paterlini, Roberto Ribeiro
;
https://lattes.cnpq.br/6240750958932738
The objective of this dissertation is to describe the work that we carry through in the elaboration of didactic material that became the teaching of logarithms more significant for the students of high school level. For this we constructed a didactic sequence using resources of mathematical education. To organize our research we use principles of Didactic Engineering. Our sequence also includes exposing lessons, activities with the use of the computer and the calculator. This didactic sequence includes Worksheets elaborated with the concern to make the student had the maximum autonomy as possible to decide them. As well as these activities, exposing lessons, activities with the use of computer and calculator are also part of our sequence. The sequence was applied to 42 students of two classrooms of first grade of high school level, in a cooperative school of the city of Araraquara - SP. For that, 15 lessons of 50 minutes each were used. Most of the activities was developed in pairs. The results were gotten through the analysis of the activities solved by the students and also through the comment and the notes that we made during the application of the sequence. According to these results we consider that our objectives were reached, because the activities were developed successfully and a posteriori analysis showed us that the applied sequence contributed for the learning of the students to occur of significant form.
As relações concretas com o outro em Entre quatro paredes
(Universidade Federal de São Carlos, 2010-03-12)
Souza, Maria Inez de
;
Fonseca, Thelma Silveira da Mota Lessa da
;
https://lattes.cnpq.br/2798630687155711