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Condutividade elétrica da solução sólida céria-zircônia dopada com ítrio e gadolínio
(Universidade Federal de São Carlos, 2009-09-10)
Antunes, Fábio Coutinho
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Souza, Dulcina Maria Pinatti Ferreira de
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https://lattes.cnpq.br/4100119317525940
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https://lattes.cnpq.br/9066668470271550
Rare earth doped ceria has a great potential to be used as electrolyte in temperatures around 800 °C in fuel cells due to its higher electrical conductivity than YSZ. However, the reduction of Ce+4 to Ce+3 in low oxygen partial pressure has introduced limitations for using doped ceria electrolyte due to electronic conduction. Among the several ceria solid solutions, CeO2-ZrO2-Y2O3 attracts attention because its stability at temperatures around 800 °C and oxygen partial pressures up 10-18 atm. On the other hand, ceria solid solutions are very sensitive to the purity of the raw material. For these reason, it is common to find secondary phase along the grain boundary blocking the electrical conduction. For these electrolytes, impurities control the grain boundary conductivity. In this work, powders (Ce0,9-xYx)Zr0,1 and (Ce0,9-xGdx)Zr0,1 with 0.10 ≤ x ≤ 0.24 were prepared by oxides mixing. The effect of successive calcinations and the addition La2O3 was evaluated. Samples obtained by isostatic pressing, were sintered between 1450 and 1600 ° C with two hours of soaking time. Sintered samples were characterized by density measurements, X rays diffraction, scanning electron microscopy and impedance spectroscopy. Among all samples, those doped with 12 mol% of co-dopant aliovalente (Y2O3 ou Gd2O3) showed similar electrical behavior. For these samples it was observed a large increase of grain boundary electrical conductivity for calcined compositions and doped with La2O3 resulting a total electrical conductivity of 4,4x10-4 S.cm-1 at 450 °C in the same order of magnitude of electrolytes Z8Y prepared for this work. Compositions containing Y+3 and La2O3 showed higher electrolytic domain compared to the other investigated compositions.
Avaliação do grau de gelificação de formulações de PVC rígido utilizando o método de ultrassom
(Universidade Federal de São Carlos, 2009-09-10)
Finocchio, Henrique
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Hage Júnior, Elias
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https://lattes.cnpq.br/1240692926327687
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https://lattes.cnpq.br/4221003986826298
The determination of the gelation degree is an important tool for predicting the properties of final products made of rigid PVC compounds. Thus, it is evident the need of a quick and effective test method that can be applied during the manufacturing process of products for quality control. In order to attend this need the ultrasound method has been applied in this work. Four rigid PVC compounds have been prepared and tested in a torque rheometer with different temperatures and times. The samples obtained, presenting different gelation degrees, have been then compression molded to obtain cubic specimens. To quantify their gelation degree the differential scanning calorimetry (DSC) technique has been applied. These specimens have been also submitted to an ultrasound testing to get their elastic constants, including the elastic modulus (E). The values of elastic modulus obtained by ultrasound have been correlated with the gelation degree obtained by DSC. In conclusion, specimens with higher gelation degrees, in general, showed higher modulus of elasticity. Therefore, it is believed that the ultrasound method may be a promising technique for evaluating PVC compounds degree of gelation and to determine their stiffness properties.
Tecendo a política. Itinerários de participação política de mulheres em movimentos sociais contemporâneos na Argentina
(Universidade Federal de São Carlos, 2009-09-10)
Bogado, Adriana Marcela
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Silva, Maria Aparecida de Moraes
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https://lattes.cnpq.br/6792025643983370
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https://lattes.cnpq.br/7628617298030269
This thesis is dedicated to the study of women‟s political participation in contemporary social movements in Argentina, by the means of the reconstruction of their course of life, from the perspective of their experiences and memories. In a context of crisis, as consequence of the neoliberal model implemented, the social movements present themselves as key areas of political struggle and, at the same time, as spaces of construction of cultural, social, political and economic alternatives. In relation with these organizations, the paths of political participation are developed and/or enhanced, however, we identify a process in which women participation becomes invisible. In this research we analyzed the mentioned participation with the aim to understand the factors and practices that generate exclusion and that which encourages its development, identifying the existence of limits and the different possibilities for women‟s political activities. We also situated the political participation within the theoretical and methodological universe of empowerment and gender relationships, in order to contribute to understand women‟s situation in the current social, political, economic and cultural panorama. The field work was developed with participants and leaders of Movimiento de Mujeres en Lucha (MML), in General Roca (Río Negro) and Rosario (Santa Fe); and with participants and leaders of the first pickets in the rural areas of Argentina and in the state of Buenos Aires, the Corriente Clasista Combativa (CCC, Zona Norte). Using the methodology of Oral History and the Participant Observation we rebuild the course of life of six women, presented in the form of biographical portraits (portraits). Each one of the portraits describes the processes of political engagement, the current involvement and future prospects, pointing out the connections with family, social and professional dimensions. Although feeling "forced" to leave in order to fight, these women have found recognition in the struggle. They also strengthened their networks of sociability, found courage to draw their own process of empowerment and they are still learning about politics in the dialectic of their course of life.
O cinema que nos dá o que pensar em Gilles Deleuze
(Universidade Federal de São Carlos, 2009-09-10)
Oliveira, Claudia Silene Pereira de
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Marques, Silene Torres
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https://lattes.cnpq.br/4822141288006918
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https://lattes.cnpq.br/9654361092283589
SADP: arquitetura de sites dirigida por personalização
(Universidade Federal de São Carlos, 2009-09-10)
Blanco, Juliano Zanuzzio
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Prado, Antonio Francisco do
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https://lattes.cnpq.br/2668568143800755
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https://lattes.cnpq.br/7759806751523441
Web sites in different areas are accessed by users with the many purposes. Several strategies have been developed and employed to improve and facilitate website access and navigation. Among these strategies there are those used to grant competitive advantages over concurrent sites, based on services of content personalization. Today, with the growth of computer networks and the emergence of ubiquitous computing, this personalization must take into account that the content of the sites can also be accessed through mobile devices. Motivated by these ideas, in this project it was developed a process in which site architectures are driven by personalization and personalized content is delivered to site users. This process, called SADP (Site Personalization by Driven Architecture), is based not only on navigation history and preferences expressed or detected by the users, but also on context information, device and network types and the site content itself. The SADP uses profiles contain information about user preferences, networks and devices used to site access. The information used to build profiles are obtained through implicit metrics, and treated using a Fuzzy Ontology. A module of Fuzzy Inference over Ontology is used to extend the user preferences. A framework for content adaptation is used to generate a site architecture based on profiles. The differential of the SADP process is that it drives the architecture of site content pages aiming to provide personalized services to the users.
Estudo fitoquímico de Rauia sp e atividades sobre formigas cortadeiras e sobre a lagarta-do-cartucho do milho
(Universidade Federal de São Carlos, 2009-09-11)
Bondancia, Tatiani Mesquita
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Fernandes, João Batista
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https://lattes.cnpq.br/2691336077459602
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https://lattes.cnpq.br/0338726994155402
The control of agriculture plague is relevant to Brazil that has large crop area. The control, by natural product, generally low toxic to humans and to animals and specific to target plague, is recommended. This work presents the phytochemical and insecticide assays carried out with organic extracts of leaves and stems of Rauia sp. Among the tested extracts, the stem extracts were more active on leaf cutter ants (Atta sexdens rubropilosa) and the extracts of leaves were more active against fall armyworm (Spodopera frugiperda). The study of dichloromethane extracts of the stem led to the identification of active substances: sitosterol, stigmasterol, campesterol, clovane-2β,9α-diol, apigenin 6-C-neohesperidosyl-8-Cglucopyranoside, apigenin 6-C-glucopyranosyl-8-C-neohesperidoside, 2 -Orhamnosyl- vitexin, 2 -O-rhamnosyl-isovitexin, vitexin, isovitexin, apigenin 6-C-β- D-glucopyranosyl-8-C-(2 -O-α-L-arabinopyranosyl-β-D-glucopyranoside), apigenin 6-C-(2 -O-α-L-arabinopyranosyl-glucopyranosyl)-8-C-β-Dglucopyranoside, vicenin-2, schaftoside, neoschaftoside, isoschaftoside e neoisoschaftoside. The sesquiterpene clovane-2β,9α-diol and glycosides flavonoids were been reported for the first time in the genus Rauia.
Caracterização do módulo elástico por espectroscopia mecânica da liga Ti-13Nb-13Zr
(Universidade Federal de São Carlos, 2009-09-11)
Muñoz Chaves, Javier Andres
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Florêncio, Odila
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https://lattes.cnpq.br/9659972316642270
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https://lattes.cnpq.br/1205198307049324
In the present time the titanium and their alloys are begin widely studied in the field of biomaterials because of its suitable mechanical properties such as low elastic modulus, excellent corrosion resistance and high biocompatibility. Recent studies are being focused on alloys free of toxic elements as Al and V, which are contained in the alloy Ti-6Al-4V that is alloy generally used in biomedical implants, since biocompatibility studies revealed adverse effects on body in long-term implants. Ti-13Nb-13Zr alloy (TNZ) is one of these new alloys and is part of the present study. Were analyzed two samples of TNZ whit changes in their final processing, begin this labeled by TNZ + WQ (sample heat treatment to 900oC and water quenching) and TNZ + WQ + 400oC/3h (sample TNZ + WQ whit subsequent aging treatment to 400oC for 3hours), in the condition as received. For study the effect of heat treatment on physical properties besides to eliminate the internal stresses in the material, these samples were submitted to additional heat treatment to 900oC/30min. Thus, measures X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed the presence of phases a and b of structure hexagonal compact (HCP) and body-centered cubic (BCC) respectively, with a microstructure martensitic, typical of this alloy. The sample TNZ + WQ, on condition as received, phase a presented as only phase, however, after heat treatment (900oC/30min) were observed precipitates of phase b besides changes in the microstructure and density. The sample TNZ + WQ +400oC/3h in the condition as received showed the presence of phases a and b as expected, since after the aging treatment phase b is present in the form of precipitates. After treatment were observed changes in the microstructure, begin obtained a martensitic microstructure better defined. Mechanical spectroscopy measurements were performed using: decay free elastometer (flexural mode) and inverted torsion pendulum type Kê (torsional mode), and the spectra of anelastic relaxation not revealed the presence of relaxation mechanisms due to interstitial or substitutional solute atoms. This behavior was attributed to the presence of zirconium in the alloy which affects the distribution of interstitial solutes in solid solution and decreases the Zr-O pairs, processes of relaxation are obtained only when the stoichiometric rate of oxygen is saturated. About elastic modulus of the samples, was showed that heat treatment to reduce internal stress resulted in an increase in elastic modulus of the samples which was attributable to the presence of phase b
Movimentos sociais, reforma agrária e escolaridade: o caso dos alunos do projeto Ceta na Bahia
(Universidade Federal de São Carlos, 2009-09-14)
Daltro, Renato Ribeiro
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Ferreira Junior, Amarilio
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https://lattes.cnpq.br/0748545841167046
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https://lattes.cnpq.br/0602637561799016
This study analyzes the educational trajectory of six students which are matriculated in the Professional Secondary Grade School and in the University Course offered by National Program of Agrarian Reform (Pronera), associated with the Movimento dos Trabalhadores Rurais Assentados, Acampados e Quilombolas (Ceta) and the University of State of Bahia (Uneb). The purpose of this research was to identify what dispositions were assimilated by the students and, consequently, to analyze the relations among their attitude and the earned knowledge and their compromise with Ceta of returning to the camps. The analysis of scholar trajectory is founded on interviews with the students matriculated in the courses of Sustainable Agriculture and Land Pedagogy. The interviews were distributed in groups according to social and economic reality of the students families and then analyzed. In the first moment it was obtained information about the Agrarian Reform on Brazil and the identification of Ceta s Movement on the Regional do Médio São Francisco, where the interviewed students live. The research describes this student s scholar trajectory from the beginning of education process, when they were taught to read and write, to the end of Middle School and the University Study and their expectation about the future. This research is based on the studies of Pierre Bourdieu and his coworkers, who explained the mechanism of strategies of social and cultural reproduction in some social structures, where groups or social classes fight against each other for cultural capital in order to grant reproduction and survival for their progeny or social group. Other studies in the same direction affirm that in situations where the economic conditions are unfavorable to education process, other aspects, mainly the non-scholar aspects, can be identified as successful if it is considered the social environment, the familiar mobilization and the kind of social and scholar trajectory, among other factors. Consequently it was examined this students trajectory, based on their testimonials, analyzing their families cultural capital, social capital and economic capital, their cultivated habitus in the inner of families, their relationship with the Ceta s Movement, the restructuring of their practices and cultural patrimony along the course. The main purpose of this study could be summarized as describing the scholar trajectory of six students, who were raised on popular sectors of open country, who are living a reality replete of subjective expectations of scholar success, in spite of objective possibilities of interruptions and of been repentant in school. Besides, there is a conflict in the inner of mobilization of social movements, where it is fought for ascending or descending positions on the exigency and collective efforts to the access to resources of Agrarian Reform, especially from National Program of Agrarian Reform (Pronera), for a gratuitous and great quality public open country education.
Desempenho de um precipitador eletrostático operando na remoção de nanopartículas de aerossóis
(Universidade Federal de São Carlos, 2009-09-16)
Meira, Camila Roberta de
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Coury, José Renato
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https://lattes.cnpq.br/2006424209258303
The removal of ultrafine particles is becoming an increasingly important operation due to the occupational problems caused to the environment and to the human health, such as inhalation of particulate matter, as well as by its applications in industrial processes. Among the equipments commonly employed for the removal of particulates from aerosols, the electrostatic precipitator (ESP) is the one capable to remove particles in a large size range with high efficiencies and can be used in the recovery of products of high aggregated value. The aim of this work was to evaluate the influence of operational parameters in the collection efficiency of a plate-wire electrostatic precipitator operating in the removal of nano-sized particles. The experimental system simulated a contamination by polydispersed nanoparticles ranging from 6 to 245 nm in an extra pure air stream. The efficiency for nano-sized particles was obtained by counting of particles before and after the electrostatic precipitator, using an electrical mobility analyzer. This procedure was performed varying the potential is applied to the discharge electrodes. The results shows the ESP presented a high efficiency of removal for nanoparticles of aerosol, where efficiencies larger than 99% were obtained for all velocities studieds (1 to 10 cm/s, with intervals of 1 in 1 cm/s) for electric field from 4 to 5.5 kV/cm. The efficiency increased with the decrease of the diameter particles up to approximately 20 nm, probably due to the higher electrical mobility of smaller particles. For diameters below 20 nm there was a drop in collection efficiency, which may have been caused by the low particles charging. The classical Deutsch-Anderson model didn t adjustment to the experimental data, the theoretical efficiency overestimated the experimental efficiency.
Uma nova abordagem na utilização de ferramentas computacionais no ensino de conteúdos da disciplina estruturas de concreto em cursos de Engenharia Civil
(Universidade Federal de São Carlos, 2009-09-17)
Faria, Antonio de
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Carvalho, Roberto Chust
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https://lattes.cnpq.br/3633394168236221
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https://lattes.cnpq.br/7589471725933484
This presentation analyzes the two computational tools, GPLAN (Plan Grills) and FTOOL (Two-Dimensional Frame Analysis Tool), and how they can be used in the content of "Concrete Structures" discipline, in Civil Engineering Graduation. The considered study is divided in two topics, being the first, the plan grills consideration (interaction plate/ beam) in the analysis of buildings floors to determine efforts and displacement, in comparison with the traditional teaching that considerate the elements in a isolated form, with the beams study through the theory of plates. The second topic refers to the porch plan consideration (interaction beam / pillar) for the lateral wind action consideration on buildings structures, and its efforts and displacements in order to analyze the instability parameter and the increase coefficient of the vertical actions z, provided by NBR 6118:2003. Thus, this study presents, in a didactic form, how the using of such tools can contribute to a civil engineer graduation regarding concrete structures, indicating through some examples, a variety of details and concepts that can be obtained through these tools. Finally, it is shown also that, to conduct checks according to the recent regulatory requirements, makes essential the use of computational tools, instead of manual methods.
Aspectos interculturais no ensino de espanhol em contato com o português em canções em livros didáticos
(Universidade Federal de São Carlos, 2009-09-17)
Schinelo, Lucimeiri Maria
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Barbosa, Lúcia Maria de Assunção
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https://lattes.cnpq.br/5030878430187815
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https://lattes.cnpq.br/7207530660219707
Historically, foreign language teaching in Brazil has been connected to linguistic politics that may determine pedagogical practices and teaching production. In spite of the existence of PCNS (National curriculum parameters) - which take holistic learning as a value and develop a communicative approach social cultural component, intercultural focuses and linguistic pluralism may occupy accessory (supplementary) position in curriculum gratings and also in foreign language classes throughout the country. We propose, in this research, to observe the way the view of teaching permeated different historical moments and influenced the treatment of cultural questions in activities that involve songs presented in four didactic books Spanish as a foreign language designated by MEC. We consider that such songs are a study source that will contribute to appreciate historical and cultural aspects in Spanish classes. Thus, we highlight the importance of promoting a closer approach to Latin America as a way to recognize us as liable to our own history. We search for theoretical backboard in communicative approach conceptions, culture and intercultural definitions and their implications in language teaching. We believe that contemporary foreign language learning from the texts contextualization and reflection made a new view on culture and language possible. We can verify it by the way that some Latin America historical, cultural and linguistic manifestations appear explicit or implicit on the selected song lyrics. Such a study propitiates a reflection on intercultural theme. It also contributes to the teaching and learning process (Portuguese and Spanish) and created ways to a critic and conscious learner education.
Potencialidades e dilemas da participação de agricultores familiares em uma metodologia de experimentação participativa para o desenvolvimento rural sustentável: um estudo de caso
(Universidade Federal de São Carlos, 2009-09-18)
Guyot, Marina Souza Dias
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Borges, Janice Rodrigues Placeres
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https://lattes.cnpq.br/2373278362705384
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https://lattes.cnpq.br/1717373612505158
In order to surpass the challenges of the Sustainable Agricultural Development initiatives where the popular participation is recognized as vital have been undertaken. However, the effectiveness of this participation varies and this changeability is related, among other factors, to the used methodologies. The objective of this research was to describe and to analyze the potentialities and quandaries of the participation of familiar farmers in the .Sustainable Agricultural Development. The participatory experimentation methodology applied is the one proposed by the project Experimentation in Agrossilviculture and Social Participation developed in the City of Joanópolis/SP. The research was carried through semi structured interviews with participant this project s farmers as well as through participant observation. The data have been systemized through re-readings, reductions and establishments of standards. Then, the data analysis was held on through the dialogue between the collected information and consulted bibliography. It was observed that the potentialities of the participation of familiar agriculturists in the Sustainable Agricultural Development are related to the search for better conditions of life. The identified quandaries allude to the lack of participation exercise both by the institutions that act with these farmers, as for themselves. It was identified that the methodology of participatory experimentation favors the participation of the family farmers in the Sustainable Agricultural Development, once it places them in the position of crucial agents of the process.
Consultoria colaborativa na escola : contribuições da Psicologia para inclusão escolar do aluno surdo
(Universidade Federal de São Carlos, 2009-09-18)
Pereira, Veronica Aparecida
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Mendes, Enicéia Gonçalves
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https://lattes.cnpq.br/2745694553486611
This study aimed to investigate the psychological procedures in the school environment which may favor the inclusion with the aid of the collaborative consultation. A total of six teachers from regular classes of the first initial years of the Elementary School, 3 of them were hired from the school and 3 were substituting. The teachers authorized the observation of their classes twice a month and also authorized the consultation procedures every other week. There were deaf students in the three classrooms, a total of six students (G1). The consultant asked the teachers to indicate other six students who presented socially accepted behavior (G2) and other six students who presented some behavioral problems (G3); all of them were identified by the employment of two behavioral scales, answered by the teachers. In order to evaluate the school performance, the hearing students and the deaf ones took part in a school performance test. Both, the behavioral scales and the school performance test were reemployed at the end of the school year. From May to December 2006, the consultant realized every 15 days, systematic observation of the classes, in the three classrooms, making observations on the diary. The registered content was discussed on the following week with each teacher, for evaluation and practices planning. At the end of the process, the consulting activity was evaluated as a possibility of baseline, either for the consultant as for the teachers in charge. The behavioral scales enabled the discrimination of socially accepted behavior and orientation for behavioral procedures which have contributed for the enhancement of opportunities. The evaluation of the scholar performance presented a correlation between behavioral problems and learning difficulties, besides indicating that actual procedures have contributed for teaching math to deaf students, but it was not assured yet, at least in that school, the alphabetization, which is an essential requirement for accessibility to the academic knowledge.
O político tornado em derrisão no gênero discursivo charge
(Universidade Federal de São Carlos, 2009-09-19)
Aguiar, Gisele Freitas de
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Baronas, Roberto Leiser
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https://lattes.cnpq.br/4613001301744682
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https://lattes.cnpq.br/9095440519377957
In this master‟s research, we analyze discursively as Brazilian political be made in derision in the print media. Based on theoretical and methodological assumptions of discourse analysis of French orientation, we work more specifically with the genre charge. This charge is conveyed by the newspaper Folha de S. Paulo during the last three presidential terms (1998, 2002 and 2006) and gave the circular images derisions the then president Fernando Henrique Cardoso and the actual president Luis Inácio Lula da Silva. Methodologically working in the beat description and interpretation (Pêcheux, 1993), showing how the historical events that FHC and Lula were protagonists and were transformed by the media print into events derision discursive. This is an important work because it contributes to a more refined understanding of the role of genre charge in our society.
Efeitos de uma desintegrina recombinante de Bothrops alternatus, DISBA-01, em células precursoras miogênicas (CPM)
(Universidade Federal de São Carlos, 2009-09-21)
Pedretti, Ana Carolina Elias
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Araújo, Heloísa Sobreiro Selistre de
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https://lattes.cnpq.br/4065824911933203
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https://lattes.cnpq.br/1547297106502078
Disintegrins are toxins commonly found in snake venoms whose biological effects occour upon interaction with surface receptors known as integrins. DisBa-01, an RGD disintegrin isolated from a cDNA library made with mRNAs from the venom gland of Bothrops alternatus, bears anti-metastatic, anti-angiogenic and anti-thrombotic activity in nude mice, partially mediated by interaction with integrin _v_3. Studies with Wistar rats also show that protein has angiogenic activity during regeneration after surgery. The objectives of this study were to evaluate the effects of DisBa-01 on adhesion, deadhesion and proliferation of C2C12 myoblasts and evaluate the electrophoretic profile of secreted proteins of DisBa-01-treated cells. Myoblasts (103 cells/well) were incubated with five concentrations of DisBa-01 under different incubation times and adhesion substracts (plastic, collagen type I or fibronectin). The supernatant was collected for 2DE analysis and the cells were quantified. Also, flow cytometry was used to evaluate the expression of integrins (_2, _4, _5, _v, _v_3, _1 and _4). DisBa-01 inhibited adhesion to fibronectin in high concentration (1000nM) and to collagen type I in all tested concentrations, but did not detach cells from collagen or fibronectina matrix nor affected myoblast proliferation. Flow cytometry showed that integrins _v and _1 were present. 2DE analysis points to an increase of secreted proteins, mainly in higher DisBa- 01 concentration (1000nM). In conclusion, C2C12 myoblasts are sensitive to DisBa-01, suggesting this protein initiates a sinalization cascade mediated by integrins, which modifies protein expression and secretion.
Diretrizes para seleção de projetistas e avaliação da prestação do serviço de projeto de edificações na visão do contratante
(Universidade Federal de São Carlos, 2009-09-23)
Paula, Nathália de
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Novaes, Celso Carlos
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https://lattes.cnpq.br/7340467051481570
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https://lattes.cnpq.br/3199008972624389
The design-product has great importance in Construction, Engineering and Architecture area, as much for its enterprise success strategic function, as for becoming possible the building materialization. Evaluating the quality of the design service rendering (DSR) can denote improvements in the design-product quality and, therefore, in the final product (building). Questions or systemized quality criteria related to DSR quality, with comments, degrees or grades/weights attribution, elaborated from the contractors of these services can allow the DSR evaluation, making possible the designer selection and the performance evaluation of contracted designers. The aim of this work is to propose a set of direction guidelines to designers selection and DSR evaluation in the contractor view. The literature review and case studies were carried out in four construction and incorporation companies and three design companies from São Paulo city. The results show that the constructors and incorporators have practices for selection and evaluation of designers. Two design companies have practices to evaluation of the contractor client satisfaction. In essence, the types of evaluation mentioned designers evaluation and evaluation of the contractor client satisfaction have the same aim: evaluating the DSR. The observation of these practices and the literature review contributed for the elaboration of guidelines to the designers selection and the evaluation of the design service rendering.
Sensibilização cruzada entre anfetamina e nicotina: avaliação neuroquímica do núcleo acumbens e córtex préfrontal em ratos adolescentes e adultos
(Universidade Federal de São Carlos, 2009-09-24)
Carneiro de Oliveira, Paulo Eduardo
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Planeta, Cleopatra da Silva
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https://lattes.cnpq.br/2514762545280942
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https://lattes.cnpq.br/9776309560034777
Nicotine and psychostimulants are often abused in combination. Drug abuse often begins during adolescence. Exposure to drugs of abuse during adolescence can have long-term consequences. We have previously demonstrated that adolescent rats pretreated with amphetamine displayed behavioral sensitization to nicotine, which persisted until adulthood. Moreover, the pretreatment with nicotine during adolescence sensitized adolescent and adult animals to amphetamine-induced locomotor activation. In the present study we investigated whether the behavioral cross-sensitization between nicotine and amphetamine is related to changes in dopamine or serotonin neurotransmission. To this end adolescent rats (post-natal day 28) were treated with nicotine (0.4 mg/Kg), amphetamine (5.0 mg/Kg) or saline during seven days. Three or thirty days after the last injection animals received an acute injection of nicotine (0.4 mg/Kg), amphetamine (5.0 mg/Kg for adolescents or 1.0 mg/Kg for adults) or saline. Thirty minutes after challenge rats were sacrificed, decapitated and brains removed. Nucleus accumbens (NAcc) and prefrontal cortex (PFC) were dissected and prepared for HPLC (high performance liquid chromatography) analysis. Dopamine, DOPAC, HVA, serotonin and 5-HIAA were measured in these brain regions. Our results showed that: 1) repeated administration of nicotine attenuated the acute effect of amphetamine on NAcc dopamine levels of adolescent rats; 2) repeated administration of nicotine increased the acute effect of amphetamine on PFC dopamine levels of adolescent rats; 3) repeated administration of nicotine, during adolescence, increased the acute effect of amphetamine on PFC dopamine of adult rats. The behavioral cross-sensitization shown previously is not related to alterations in NAcc and PFC concentrations of neurotransmitters and its metabolites. However, neuroadaptations induced by repeated nicotine during adolescence endures until adulthood.
República Pau-Brasil : política e literatura no modernismo de Oswald de Andrade
(Universidade Federal de São Carlos, 2009-09-24)
Bertelli, Giordano Barbin
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Pellegrini, Tânia
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https://lattes.cnpq.br/0280434883580627
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https://lattes.cnpq.br/8423897663939012
This work aims to investigate the relationship between politics and literature in Oswald de Andrade s modernism, mainly through the reading of Manifesto da Poesia Pau- Brasil, Manifesto Antropófago and the poetry book Pau-Brasil. We have analyzed such relationships focusing on the junction between the literary and the political fields, and the integration of its logic and agents in the sociocultural diversity process related to coffee growing. We aim at clarifying the ambiguous aspects of complicity, collaboration and dissent that the propositions and achievements of Oswald s aesthetic presented, vis a vis the efforts of preparing an epic for São Paulo. Carried out by groups and leaders of Sao Paulo s literate elite, the épica bandeirante aims to building a sociosymbolic order, which would distinguish its hegemony and would neutralize the threats arising from the cultural otherness of social groups originated in the process of change that then crossed the social area of São Paulo. In this field of forces, the modernism of Oswald appears as a symbolic force fed social and subjectively of the conflicts that composed its conditions of emergency.
Cores e seus significados no senso comum para apoiar a colaboração na aprendizagem via web : uma solução em forma de Padrões de Design Motivacionais
(Universidade Federal de São Carlos, 2009-09-24)
Dias, Ana Luiza
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Silva, Junia Coutinho Anacleto
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https://lattes.cnpq.br/6200743168568684
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https://lattes.cnpq.br/6673911479799192
Collaborative learning supported by computers increases due to the tendency schools have to get assumed to digital inclusion in curriculum and to explore this potential as an alternative complementary to the traditional teaching methodology. According to this new practice the individual skills are valued and contribute to build up learning, which belongs to the group. However, it can be seen that learning through computing environment is not always effective because it can generate lack of motivation, little involvement and collaboration as there are limitations in computational proposals, which must always be seen as complementary to face interaction. It is always difficult to engage apprentices in learning activities in order to motivate them both to persist in challenging tasks and to value education, generally. In order to minimize the inequality of socioeconomic conditions and provide solutions that can consider cultural values of each learner involved in a collaborative task, this work shows the formalization of a Motivational Design Proto-Pattern Set based on colors and their cultural meanings built in common sense of the Brazilian. This set aims to support educational solution design to Web, which promotes collaboration, since colors may highlight important points, facilitate content reading and consequently, increase the satisfaction of use of computer resources and engagement of apprentice in their learning. The common sense used comes from the knowledge base of the Open Mind Common Sense Brazil Project (OMCS-Br) (http://www.sensocomum.ufscar.br). In order to validate this work, a Web collaborative educational environment has been modified changed applying on one of the formalized proto-patterns, and the environment was used in Vivência-Anglo S.S. Educational School in Itapira/SP, a partner in the LIA in the study of computer applications for childhood education, where was developed a case study. The results have pointed out the potential of color as a stimulus to motivation and learning, as well as the interest between educators and apprentices on Web collaborative educational environments, breaking the learning traditional paradigm, now with the computer support.
Uso de senso comum no apoio a jogos narrativos para crianças em idade escolar
(Universidade Federal de São Carlos, 2009-09-24)
Silva, Marcos Alexandre Rose
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Silva, Junia Coutinho Anacleto
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https://lattes.cnpq.br/6200743168568684
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https://lattes.cnpq.br/3381517748983487
This research describes how common sense knowledge can help to define and to tell stories in narrative games. In order to evaluate this possibility, it has been developed a Web narrative game, called Contexteller, which allows educators to teach some skills that are part of the student s education and life, such as: ways to express themselves and to work in group. Nowadays, there are several educational challenges to teach some skills at school. For instance, educators can not easily find a tool or activity in order to help them to work collaboratively with their students. Therefore, this game allows educators, as co-authors, to create the story taking into account their goals, pedagogical approach and the student s cultural reality. Through the game, they can get some information related to the student s values, culture and knowledge, i.e., student s common sense. Then, teachers can use common vocabulary before and during the narrative, considering myths, beliefs and knowledge of the students´ group and, consequently, enabling them not only to identify but also to get interested in collaborate with the teacher and the other students to develop the story. In order to observe the use of this game in an educational environment and collect the opinion of target group a study case, described in this thesis, was performed at a school in Itapira/SP.