Browsing by Issue Date, starting with "2009-06-22"

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Estudo da sinterização de compósitos densos de Al₂O₃ contendo inclusões nanométricas de ZrO₂
(Universidade Federal de São Carlos, 2009-06-22)
Déo, Luciene Cristina Chiari
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Tomasi, Roberto
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https://lattes.cnpq.br/8591752492566665
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https://lattes.cnpq.br/7728256316655962
The search for materials that posses exceptional hardness, resistance to high temperatures and chemical stability had expanded the areas of application and use of ceramic materials. The development of research about composites containing nanometric inclusions in its matrix increased due to the results of significant improvement in the mechanical properties of composites formed by an alumina matrix with nanometric inclusions of SiC. The mechanisms that enable the improvement of this property have not been fully justified. It was found that the presence of nanometric inclusions delay the beginning of the densification and shrinkage of the samples by raising the temperatura of sintering. This fact was the main motivation for the accomplishment of this work, that had as objective to study the sintering kinetics in the initial stage of alumina samples with and without the presence of nanometric inclusions of zirconia. The study method used was that proposed by Woolfrey and Bannister based on the work of Young and Cutler. With the application of this model, possible mechanisms acting in the system were identified. The samples had been gotten by the desaglomeration of the powders and posterior mixture in mill, isostatic pressing and sintering in dilatometer under constant taxes of heating of 3, 5, 9 and 15 C/min in air, with maximum sintering temperatures of 900, 1000, 1100, 1200, 1300, 1400 and 1500 C. The samples had been characterized how much its apparent density, specific superficial area and microstructure. A change in the mechanism acting in the initial stage of sintering was identified for samples containing nanometric inclusions of zirconia.
Sistema de produção orgânico de milho (Zea mays L.), feijão (Phaseolus vulgaris L.) e mandioca (Manihot esculenta Crantz) consorciados com soqueira de cana-de-açúcar (Sacharum spp.)
(Universidade Federal de São Carlos, 2009-06-22)
Apolari, João Paulo
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Margarido, Luiz Antonio Correia
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https://lattes.cnpq.br/5685663057214334
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https://lattes.cnpq.br/4466408577931725
Greater stability of an agroecosystem can be achieved through the consortium system under organic management, becomes an important environmental factor to a highest stability of the agroecosystem. The objective was to study a system of production for organic crops of maize (Zea mays L., cv. BR 106), bean (Phaseolus vulgaris L., cultivar IAC Pérola) and manioc (Manihot esculenta CRANTZ, cv. IAC 15), intercropped with ratoon-cane (Saccharum spp.). The experimental design was a randomized, with eight (8) treatments and four (4) replicates, as follows: T1 ratoon-cane without intercropping (control), T2: ratooncane and intercropping of maize (cs + mi), T3: ratoon-cane and intercropping of bean (cs + fe); T4: ratoon-cane and intercropping of manioc (cs + ma), T5: ratooncane and intercrops of maize and bean (cs + mi + fe) T6: ratoon-cane and intercrops of maize and manioc (cs + mi + ma); T7 ratoon-cane and intercrops of bean and manioc (cs + f + ma), T8: ratoon-cane and intercrops of maize, bean and manioc (cs + mi + fe + ma). Productivity of the crops, the gross income obtained and the residual biomass waste of maize, beans and manioc, in each system were evaluated. For the conditions of the experiment, the treatment intercropping maize (T2) showed the best results on productivity of green maize ears (kg/ha), production of biomass (kg/ha) and gross income (R$/ha). The alternative of the consortium of distinct crops with ratoon-cane proves to be an effective technique that, from the viewpoint of agroecology, becomes an important tool for preserving and maintaining the agroecosystem, besides providing alternative foods and additional income to the farmer.
Otimização no planejamento agregado de produção em indústrias de processamento de suco concentrado congelado de laranja
(Universidade Federal de São Carlos, 2009-06-22)
Munhoz, José Renato
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Morabito Neto, Reinaldo
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https://lattes.cnpq.br/8506951656740145
This work aim at developing models using linear programming, goal programming and robust optimization to support decision making in the frozen concentrated orange juice planning process. The proposed model includes orange harvesting plan, which takes into account oranges maturation curves. This fact leads to a model that incorporates a large portion of the supply chain involved in the frozen concentrated orange juice sector. Another point to highlight is the inclusion of the blending process of different types of juices to match ratio specification of the product. This study uses orange acidity to calculate ratio specification of the product. This study also explores the importance of data uncertainty incorporation to the aggregate production planning for this business and evaluate results from different approaches of robust optimization to this problem. This author is not aware of previous work in the literature with such approach to the orange juice industry. The problem modeling uses blending problem concepts and production planning with multiple products, stages and periods concepts as well. To solve the linear programming, goal programming and robust optimization models, an algebraic modeling language and a state of art optimization solver of mathematical programming problems is used. A case study was developed in an orange juice company located in the São Paulo State. This company has many facilities and a worldwide distribution system, similar to other companies in this sector. The results show that the proposed approach can be used in real situations.
Educação ambiental e aprendizagem dialógica: possibilidades e limites para a transformação da escola e seu entorno
(Universidade Federal de São Carlos, 2009-06-23)
Ribeiro, Caroline Lins
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Logarezzi, Amadeu José Montagnini
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https://lattes.cnpq.br/6153358744019882
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https://lattes.cnpq.br/5135544340165468
The research focuses on the construction of knowledge about teaching practices in environmental education, linked to the social perspective, transformative, democratic and dialogical. We have the participation of two teachers of the Collective Environmental Educator of Campinas (Coeduc), part of the National Training of Environmental Educators (Profea) guided by the guidelines of the national environmental education. We traveled paths with teachers identifying the obstacles in their practices and ways of overcoming these, towards the school we want. We conducted our research with the guidance of the communicative and qualitative methodology. We approach the critical method of communication, who guided us on the instruments for data collection and analysis procedures, ensuring the intersubjective dialogue and reflection, enabling deep learning, processing and discussion about the capabilities of interpretation of reality made by the subjects who live . It will explain that the school needs to ensure access for people demanding activities and practices in context and reflective about the environmental problems of today. Thinking of overcoming inequalities, strengthened and generated by the mainstream in the information society, we choose the critical environmental education and dialogic learning, elucidated by authors who bet on the contribution of education for social transformation. Therefore, we raised a record on the information society and the environmental movement, environmental education and its context. We point out the theoretical underpinnings of the dialogic learning, explaining the communicative action Habermas, Freire and dialogical in learning and development in Vygotsky to support our research. Before the analysis with the teachers realize that the power of collective participation and the possible changes in the school environment and beyond. An instrument is a communicative action, with proposals to transform reality, linked to contexts, cultures and personal experiences, especially the intersubjective interactions. In this sense, the critical environmental education built as public policy is marked by great challenges also faced by social movements, education, involving different people and institutions who strive for a school and a society more just, equitable and environmentally sustainable.
Educação das relações étnico-raciais: aprendizagens e experiências de professoras em São Carlos-SP
(Universidade Federal de São Carlos, 2009-06-24)
Demarzo, Marisa Adriane Dulcini
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Silva, Petronilha Beatriz Gonçalves e
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https://lattes.cnpq.br/5770245673371690
Linha de base cumulativa e sistema de conseqüências no ensino informatizado de leitura
(Universidade Federal de São Carlos, 2009-06-25)
Cordioli, Raquel Baccarin Ribeiro
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Souza, Deisy das Graças de
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https://lattes.cnpq.br/4404800720856419
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https://lattes.cnpq.br/0284918535550702
The study evaluated two versions of a computerized program for teaching reading skills (de Souza e de Rose, 2006) which was intended to teach the relations between sets of stimuli consisting of a written word, a picture and a spoken word. Although developed to ensure that the apprentice advance at his own pace, the steps of this program were designed to teach fixed sets of three words. This meant that until he reaches the criterion of 100% of hits for the whole set, the participant keeps repeating the same step. This feature may require a number of unnecessary steps, and also result in damage to the motivation, as the participant can judge he is not progressing. The objective of this study was to determine whether a new organization of the steps of teaching, including only words whose relations are not mastered by the participant, could expedite the conclusion of the program. Additionally, it embedded a virtual album of stickers with the function of providing feedback to the learner of his performance. The stickers were presented as a consequence to the establishment of relations between the stimuli of each of the sets. In Study I the new procedure was introduced to five participants who were being exposed to the original persion and the results showed an acceleration in the pace of learning for four of the five participants. In Study II, the assessment of reading is held throughout the cumulative baseline and not only for last 15 words of the unit, as determined in previous procedures. The program was completed when the participant completed the reading of 60 words. Eleven students with different entry repertoires in reading completed the Study II. The data were compared to 14 students with similar repertoire that had completed the original version. The new version resulted in a decrease in the total number of sessions for most participants. A more pronounced decrease was observed in achieving the first half of the expected repertoire in this study. Another result observed was greater number of words taught by the intermediary sessions. The new contingencies of teaching led to a higher individual progress, greater variability in the content taught and can accelerate the progress of the participant.
Avaliação da diversidade e estrutura genética de Micoureus paraguayanus (Didelphidae) através do marcador mitocondrial d-loop no Parque Estadual Morro do Diabo e em fragmentos de Mata Atlântica adjacentes
(Universidade Federal de São Carlos, 2009-06-25)
Cattony Neto, Pedro de Queiroz
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Rodrigues, Fernando Pacheco
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https://lattes.cnpq.br/1351286774058975
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https://lattes.cnpq.br/8154585078632750
The dynamics of use of land in urban and agricultural areas has led to destruction and fragmentation of ecosystems. It has been related to the increase of susceptibility of natural populations to extinction due to increase of isolation between populations and reduction of population size. To evaluate the effect of the recent habitat fragmentation on the genetic diversity of natural populations, we will analyze the diversity and genetic structure of populations of the wooly mouse opossum Micoureus paraguayanus (Marsupialia: Didelphimorphia) in the Parque Estadual Morro do Diabo (SP) and in bush fragments in its surroundings. For this purpose, we used the control region (D-Loop) to examine population structure and dynamics in fragmented forest habitats. We found low values of haplotypic and nucleotidic diversity when compared to values from previous works with marsupials in fragmented areas. We found values of diversity of 0.28 and 0.0022% respectively. Besides that, there was a correlation between continuous cultivated lands distance and number of exclusives haplotypes. The AMOVA test showed no genetic structure between fragments, however, Fst values indicated significant genetic differentiation to Santa Tereza and Ponte Branca when compared with all the others fragments. These are between the smallest areas evaluated in this study and the differentiation indicates that the recent fragmentation suffered by these patches could be responsible for the changes in the genetic composition of these populations.
Propriedades de transporte de spins polarizados em heteroestruturas semicondutoras
(Universidade Federal de São Carlos, 2009-06-25)
Pacobahyba, Luiz Henrique
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Bittencourt, Antonio Carlos Rodrigues
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https://lattes.cnpq.br/1105838755157684
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https://lattes.cnpq.br/8694960488322263
In this work we used the technique of scattering matrix to calculate the transmissivity of polarized spins in a semiconductor symmetrical double-barrier heterostruture. The dynamics of carriers is described by effective mass approximation applied to models of Dresselhaus and Bychkov-Rashba. In the former case, the hamiltonian was studied in its full form, free of approximations. Both models describe interactions of type Spin-orbit, which is basically a coupling between the orbital angular moment of the electron with its magnetic moment of spin. This type of coupling as a consequence creates a splitting of some levels of energy, initially degenerate, resulting in a spectrum of energy more complex than that obtained without taking it into account such interactions. The transmissivity is calculated as a function of some parameters, for the type InAs=GaSb=InAs=GaSb=InAs. All results are compared with literature, and provide new information about the systems. The effects of spin-orbit interactions of Rashba and Dresselhaus show is very favorable to engineering in the manufacture of .lter spin and spintronic devices, as well as the injection of spin in quantum wells and semiconductor detectors based on non-magnetic asymmetric double barrier.
Valoração contigente de um projeto de recuperação de qualidade das águas - o caso do córrego Limoeiro em Presidente Prudente, SP
(Universidade Federal de São Carlos, 2009-06-26)
Pontes, Márcio Rogério
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Salvador, Nemésio Neves Batista
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https://lattes.cnpq.br/9930582531600560
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https://lattes.cnpq.br/9014098108599003
The purpose of this work is to evaluate, according to the population s perception, the benefit to the environment by treating the sanitary sewers flowing into the Limoeiro stream located in Presidente Prudente, in the state of Sao Paulo. It is sometimes difficult to place a value on natural resources and this research attempts to develop a method to place a value to this particular natural resources, the Limoeiro stream. By making it possible to have a base of common comparison, the financial value, provides a justification for investments in environment conservation projects. With this objective, the contingent valuation method was used to evaluate the natural resource which investigated the disposition of the population to pay for this process in two types of scenarios. In the first scenario, which presents the legal view of the conservation, determined that it would be R$ 5,12 with 95% of entrust and a plus or minus 10% margin of error. In the second scenario, which presents the ideal view of the water course conservation would be R$ 7,35 also showing a 95% entrust and a plus or minus 10% margin of error. A period of 30 years was stipulated and the global liquid present value between R$ 9.126.914,16 to R$ 16.011.288,26 with a discount tax of 12% of the capital.
Efeitos da ventilação mecânica não-invasiva na variabilidade da freqüência cardíaca e no padrão ventilatório de pacientes submetidos à cirurgia de revascularização do miocárdio
(Universidade Federal de São Carlos, 2009-06-26)
Pantoni, Camila Bianca Falasco
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Silva, Audrey Borghi
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https://lattes.cnpq.br/4855616925791895
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https://lattes.cnpq.br/0244296301167548
Noninvasive positive pressure ventilation (NIPPV) has been commonly applied in several clinical and postoperative conditions, especially after coronary artery bypass grafting (CABG) surgery and it can cause breathing pattern (BP) alterations and mechanical effects on cardiovascular system, with cardiac autonomic adjustments. However, it is not well established in the literature how these alterations occur in patients submitted to the CABG and if they can be related to the application of different positive airway pressure levels. In this context, we considered the development of two studies that could contribute with new information about these topics. The first study is entitled Acute application of bilevel positive airway pressure influence cardiac autonomic nervous system and its objective was to evaluate the changes in heart rate variability (HRV) during bilevel positive airway pressure (Bilevel) application in healthy young men. Twenty men underwent a 10-min register of R-R intervals (R-Ri) during sham ventilation, Bilevel 8-15cmH2O and Bilevel 13-20 cmH2O. HRV was analyzed in time and frequency-domain and with non-linear statistical measures. Physiological variables (blood pressure, breathing rate, end tidal carbon dioxide- ETCO2) were also collected. R-Ri mean, rMSSD, NN50, pNN50 and SD1 reduced during 13-20 cmH2O compared to sham ventilation, with reduction of the R-Ri mean compared to 8-15 cmH2O. R-Ri mean and high frequency band (HF) reduced and low frequency band (LF) increased during 8-15 cmH2O compared to sham ventilation. Delta of ETCO2 correlated positively with LF, HF, LF/HF, SDNN, rMSSD and SD1. In conclusion, acute application of Bilevel was able to alter cardiac autonomic nervous system, with parasympathetic activity reduction and sympathetic increase and higher level of positive airway pressure can cause a greater influence on the cardiovascular and respiratory system. The second study is entitled The effects of different levels of positive airway pressure on respiratory pattern and heart rate variability in patients submitted to coronary artery bypass grafting surgery and its objective was to access the effects of different levels of continuous positive airway pressure (CPAP) in BP and HRV in CABG postoperative (PO), as well as the impact of CABG in these variables. Eighteen patients underwent CABG was evaluated during spontaneous breathing (SB) and four different CPAP levels of CPAP, in a random order: (a) CPAP = sham (3 cmH2O), (b) 5 CPAP = cmH2O, (c) 8 CPAP= cmH2O, (d) 12 CPAP = cmH2O in PO. HRV was analysed in time and frequency domain and by non-linear methods (Poincaré plot e Detrended Fluctuation Analysis) and BP was analysed by inductive respiratory plethysmograph. There were significant alterations of HRV and BP in the PO of CRM, compared to pre-operative and alterations of DFAα1, DFAα2 e SD2 and respiratory variables during NIPPV, with higher influence observed during application of the two higher levels applied. Moreover, there was relationship between DFAα1 and inspiratory time of delta 12 cmH2O and SB, and 8 cmH2O and SB. In conclusion, acute CPAP application was able to alter the control of cardiac autonomic nervous system and BP of patients submitted to CABG and higher levels promoted better performance of pulmonary and cardiac autonomic function.
A educação pelo castigo, na perspectiva da religião católica e do direito penal
(Universidade Federal de São Carlos, 2009-06-26)
Gentil, Plínio Antônio Britto
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Tagliavini, João Virgílio
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https://lattes.cnpq.br/8442080379349434
This is a search on the Catholic religious order and the legal system represented by the criminal law, showing how, according to its regulatory structures, subject to mechanicalrelated offense and the punishment. It is shown how, through a language that uses symbols of both the Church and the State seek to make individuals internalize the values and standards of conduct, to lead them to a range of desirable behavior. The internalization of the feeling of guilt and will be punished eventually integrating this universe of values and modeling behaviors. Thus, a control system based on the prospect of punishment, and before that, in the formation of consciences, has an important social role and falls in a real educational process. This is an education geared towards the stabilization of patterns institutionalized, in tune with the current model of economic development. The symbolic interactionism highlights the intense use of symbolism in the formation and communication of these standards. The perspective of historical materialism shows that the stage of organization of productive forces is a fundamental element that ideology and thus determines the evolution of mechanisms of sedimentation and its control. The criminal law as well as other rights, here treated as the legal system in force, plays the dominant ideology and draws upon models of transgressions and sanctions, the limits of human conduct and, consequently, the way forward. The Catholic religious order also taken as a normative structure called the Roman Church, seeks to establish a line of procedure which lead to the salvation of the individual. She goes down a path whose bases can often be explained historically, but the search for redemption in a virtual world means that its postulates are situated in a plane that transcends life itself. The acceptance of religious dogmas usually occurs before the law. The rich symbolism employed in its communication to humans contributes to the insertion depth of their culture and values in developing a sense of guilt before the fear of punishment by the state power, before it has also collaborated with him. Church and state, thus moving together in the formation of desirable standards of conduct. With a broadening of horizons of the religious order and the legal as well as formal education, it seems, however, possible to mark positions in a counterhegemonic history, which tends to expand the boundaries of the emancipation of the individual.
Formação do campo policial na "Princesa do Oeste": relações de poder e conflitos cotidianos entre elites, populares e a Polícia de São Carlos, 1888 - 1914
(Universidade Federal de São Carlos, 2009-06-26)
Furlas, Héllen Aparecida
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Truzzi, Oswaldo Mário Serra
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https://lattes.cnpq.br/5005536921435787
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https://lattes.cnpq.br/5115031712822693
The objective of this research is to analyse the formation of the policing field between the end of the nineteenth century and the beginning of the twentieth century, utilizing as a base a case study of the police and policing in the city of São Carlos (do Pinhal) between 1888 and 1914. The present research has three basic objectives: to study the social relationships between the police and the local elite of this city; to understand the relationships between the Civil Police and the Public Force in that locality; and to investigate the nature of everyday relationships between the police and the population (immigrants and poor Brasilians) in the this city and period through the analysis of police inquests, criminal trial records and police correspondence, in addition to the analysis of local almanacs.
Estudo do processo de cristalização de sacarose a partir de soluções provenientes de cana-de-açúcar por resfriamento controlado
(Universidade Federal de São Carlos, 2009-06-29)
Merheb, Graciela de Amaral
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Giulietti, Marco
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https://lattes.cnpq.br/7703659740618915
Today, Brazil is the major producer and exporter of sugar in the world. In the last harvest 2008/2009, 31.5 millions tons were produced, of which 60% were exported providing a 40% of international market share. However, sugar is a product that has commercial difficulties, due to the hard restrictions, such as rates, subsidizes and technical barriers like the use of sulfur (input) in laundering. Because of this, the development of a technology for the production of sugar with superior quality, less cost and without sulfur for the laundering would be of great interest for the productive sector. The present work aims to study the process of crystallization of sucrose from sugar solutions of syrup and sugar cane by controlled cooling. A laboratory plant with production capacity of 1 kg of sugar per batch, installed in the laboratory of industrial development of the Sugarcane Technology Center (CTC) in Piracicaba was used for the present work. The results regarding the reduction of impurities initially present in sugar crystals through crystallization by controlled cooling were: 95% in color, 85% in starch and 80% in dextran. For the syrup classified as VVHP, reductions obtained in crystals through crystallization by controlled cooling were: 96% of the final color of the sugar (from 10,100 IU to 361 IU), 98% in the amount of ash conductivity, 84% in the amount of starch and 52% in the amount of dextran. Obtained the results led to the construction of a pilot plant by scaling the process that will be implemented in an industrial unit.
Formação de redes sociais de empresas incubadas : o caso da incubadora de empresas de base tecnológica de Ribeirão Preto
(Universidade Federal de São Carlos, 2009-06-29)
Populin, Tatiana Borges
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Côrtes, Mauro Rocha
Technological based firms (TBFs) have been widely studied because of its importance in the nation´s innovation system. Health industry is one of the most innovative sector at the economy and it´s constituted also of great corporations and health care manufacture equipment and biotechnology small firms that compete at health equipment manufactory and biotechnology market niches. Ribeirão Preto is characterized as one of the technological region at São Paulo state. The development of SUPERA is one of the strategies adopted to consolidate the city as a health technological polar region. This work analysis the social relations between technological-based firms and institutional agents of health sector. For this purpose it´s used social networks methods to calculate specific measures such as density and centrality degree of actors. It evidences that SUPERA is at the center of studied information and cooperation networks. Theorists defend that these kind of network support companies´ innovation process and its competitiveness. The analysis of density and centrality measures so as actor´s scores of 2-mode matrices where calculated using the software Ucinet. The results confirm the central role of SUPERA for the creation of new TBFs; identify that the studied firms are inserted in low density networks and that strong relations seems to exist more frequently in cooperation relations between university-firms rather than with another institutions. It concludes that there are few entrepreneur´s information exchange relations and that they do not recognize the relevance of institutional agents in the firms innovation process. Cooperative action is almost inexistent or occurs in the informal level without relevance to the TBFs´ innovative system. The incubation process seems to be the extension of academic projects that tends to the mantain the distances between firms and market reality.
Aprendizado de máquina baseado em separabilidade linear em sistema de classificação híbrido-nebuloso aplicado a problemas multiclasse
(Universidade Federal de São Carlos, 2009-06-29)
Tuma, Carlos Cesar Mansur
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Figueiredo, Maurício Fernandes
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https://lattes.cnpq.br/4514898499279696
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https://lattes.cnpq.br/0916152883066962
This master thesis describes an intelligent classifier system applied to multiclass non-linearly separable problems called Slicer. The system adopts a low computacional cost supervised learning strategy (evaluated as ) based on linear separability. During the learning period the system determines a set of hyperplanes associated to oneclass regions (sub-spaces). In classification tasks the classifier system uses the hyperplanes as a set of if-then-else rules to infer the class of the input attribute vector (non classified object). Among other characteristics, the intelligent classifier system is able to: deal with missing attribute values examples; reject noise examples during learning; adjust hyperplane parameters to improve the definition of the one-class regions; and eliminate redundant rules. The fuzzy theory is considered to design a hybrid version with features such as approximate reasoning and parallel inference computation. Different classification methods and benchmarks are considered for evaluation. The classifier system Slicer reaches acceptable results in terms of accuracy, justifying future investigation effort.
A aprendizagem da docência de uma professora iniciante : um olhar com foco na intermulticulturalidade
(Universidade Federal de São Carlos, 2009-06-29)
Palomino, Thaís Juliana
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Lima, Emília Freitas de
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https://lattes.cnpq.br/4005182211673754
The diversity invades the school through the culture and beliefs of students and their families, minority groups etc. The attention to issues such as diversity, difference, equality and inequality it is urgent. In this scenario, the teaching can not only field of teaching contents. It needs to be intermulticultural, understood as that one that considers the diversity and differences and conceives the inaqualities as constructed in the discursives and social relations. Moreover, the teacher, whose practices are based on intermulticulturality, conducts its activities with political sensitivity to transform social reality. Under these assumptions, this research was carried out with a beginner teacher in their first two years of practice in teaching (with two classes of first grade) in order to assist it in the construction of teaching practices based on intermulticulturalidade. Initially we offer a course for continued formation on the thematic that had as main objective to help the participants realize ideological traps and disarm them in which we, teachers, fall in the classroom. Soon after, one of the teachers of the course expressed interest in continuing to work and was monitored for two semesters. In its first two years of teaching in two different schools, one countrified and one urban, the teacher went through all the difficulties to the beginning of the career: a professional loneliness, fluctuations between discovery and survival, the desire to abandon a career were reported feelings for her. While we folloied her in the classroom, we see the ideological traps in which the teacher fell and especially the reasons that led to fall, that is, to understand its cultural conceptions, as interrogated it them and to help it in this process. In interviews and informal conversations the teacher explained some stereotypical beliefs and values, while they, in their work in the classroom, invested in some practices that they considered and worked with the diversity and difference between their students and which the students in a positive way. Some approaches and practices based on removals intermulticulturality are perceived, also, as fruit of adversity the start of teaching.
Mecanismos de controle da hidratação da magnésia visando sua utilização em concretos refratários
(Universidade Federal de São Carlos, 2009-06-30)
Amaral, Léa Fantin
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Pandolfelli, Victor Carlos
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https://lattes.cnpq.br/7369376873984839
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https://lattes.cnpq.br/4269397952023027
The increasing demand in the last years enhanced significantly the steel industry production As a consequence, most of the aspects regarding its production had to be reviewed aiming an optimum output. Concerning this goal, the reducing in equipments idle time on refractory lining maintenance or replacement can be seen as an interesting technological advantages. Achieve better refractory is an accord named gain-gain for both: steel and refractory industry. For steel industry because the more refractory last, the more steel is produced and in the refractory industry because they can increase the aggregate value of their products. In this context, the development of MgO based monolithic refractory has widespread aiming to achieve a matching of advantages, such as absence of joins, facility of installation and repair, high basic slag corrosion resistance and high refractoriness. However, due to the hydration reaction of magnesia forming Mg(OH)2, its application in refractory area is limited. If this problem would be solved, superior properties for the refractories can be achieved. This work aimed to:1) Analyze the aspects that could affect the MgO hydration reaction and 2) Highlight additives that could minimize its drawbacks and,, at the same time, being viable concerning the real applications.
Caracterização de imagens em livros didáticos e suas contribuições para o processo de significação do conceito de equilíbrio químico
(Universidade Federal de São Carlos, 2009-06-30)
Kiill, Keila Bossolani
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Ferreira, Luiz Henrique
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https://lattes.cnpq.br/4819009378941531
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https://lattes.cnpq.br/3094025825865221
This work studies images contained in Chemistry textbooks approved by the PNLEM/2007. The goals of this research were: a) to characterize these images, discriminating those that compose Chemical Equilibrium Chapters, according to the chemical knowledge dimensions (macroscopic, submicroscopic and symbolic); and b) to evaluate the contributions brought by these images to the significance trial of that content. The methodology for data collection was the double-blind one, in which each researcher, independently, proposes a classification, that is later validated by means of statistical instruments. It was elaborated a taxonomy for data collection, wherein the categories of analysis were discriminated. To analysis of the images, is necessary consider the interrelations between them, therefore, in a same visual representation, is possible have the knowledge represented in two more dimensions. The theoretical referential substantiates itself in the meaning learning, proposed by Ausubel and collaborators, and also in the signs conceptions developed by Pierce. The analysis results showed that, in the total, the best part of the images represents the chemical knowledge considering only the macroscopic aspect or not classified. For the chemical equilibrium chapter, in general, proposed representations for helping the understanding of that content are also of macroscopic nature or not classified. Regarding to the trial of significance of chemical equilibrium content, contributions of others contents such as chemical reaction, kinetic chemical and stoichiometry were also considered for images analysis. Thus, it was possible to conclude that representations found in textbooks are of macroscopic nature and typify chemical systems properties. Moreover, an expressive amount of images merely presents illustrative character and other few correlates dimensional aspects. Therefore, images contained in general textbooks poorly collaborate to the significance trial of chemical equilibrium content.
PAIGC : A face do monopartidarismo na Guiné-Bissau (1974 a 1990)
(Universidade Federal de São Carlos, 2009-06-30)
Semedo, Rui Jorge da Conceição Gomes
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Braga, Maria do Socorro Sousa
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https://lattes.cnpq.br/2311094074614215
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https://lattes.cnpq.br/7911343393159655
This research investigates the political dynamics of PAIGC (African Party for the Independence of Guinea and Cape-Verde), that during and after the process of getting the independence from the portuguese, wich was done through a long liberation war, has a tremendous help from the mass. PAIGC officially conquered the political power in 1974 and ruled for a period or 16 year, as a sole political party. During this period, it showed a lot of dificulties to realize its program of governance. This fact leads to a fundamental question: how come that a party that counted with a strong base of help from the mass and acted as a sole political force that controlled the machinery oh the state was not able to implement its proposals of governance?
Variações no gene yolk em moscas das frutas do grupo fraterculus
(Universidade Federal de São Carlos, 2009-06-30)
Oliveira, Gustavo Castro de
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Brito, Reinaldo Alves de
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https://lattes.cnpq.br/8253066295947754
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https://lattes.cnpq.br/0816557348697162
Species of the fraterculus group are associated to the biggest damages to fruit crops due to the fact that they attack indiscriminately green and ripe fruits, making them pests of great economic importance. These species are hard to tell apart, even showing some potential criptic species. The understanding of the populational structure and biology of this species group is of paramount importance to strategies of management and control of these pests. Here, we investigate variation on the gene yolk em 37 individuals sampled throughout the species distribution in Brazil seeking to better understand the populational structure of this species group in Brazil. Our data indicated existence of recombination, which lead us to analyze three different regions in the gene, 5 , mid, and 3 . These regions show high levels of nucleotide diversity intra and interspecifically for all three gene regions investigated. The use of Nested Clade Phylogenetic Analysis independently used on these regions indicate two main results that occurred more than one throughout our analyses. The first is a range expansion from north-NE populations towards the south, mostly related to specimens of Anastrepha fraterculus. The second common event, detected eight times, is restricted gene flow with isolation by distance (IBD). Dating of such events indicated that they are temporarily congruent which might indicate that the lack of IBD in other levels of the analysis might be caused either by sampling limitations or an excess of local gene flow that tampers out as we move farther in space. Our results of the gene yolk have provided us with a better understanding of the levels of local variation of this marker of for the species that may help us determine the evolutionary processes that shaped the species group current distribution.