Browsing by Issue Date, starting with "2007-05-03"

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O problema dos fenômenos de dirupção e de reação zonal no sistema Pb/PbSO4/H2SO4
(Universidade Federal de São Carlos, 2007-05-03)
Fernandes, Fabio Plut
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D'Alkaine, Carlos Ventura
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https://lattes.cnpq.br/8699821828310072
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https://lattes.cnpq.br/4836435433244717
Determinação da cinética de cristalização em diferentes escalas visando o projeto de cristalizador em batelada utilizando o sistema monopentaeritritol-água como modelo
(Universidade Federal de São Carlos, 2007-05-04)
Bernardo, André
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Giulietti, Marco
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https://lattes.cnpq.br/7703659740618915
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https://lattes.cnpq.br/5705402824877708
Previous studies on crystallization as an industrial process have been frequently limited to just one aspect of the process. They usually study parameter optimization or a method for monitoring solution or suspension, frequently not taking into account the several aspects that compose the quality of crystalline product, or the fact that the studied process is such more important when can be applied in industry. From this point of view, this study proposes to go forward to the evaluation of feasibility of industrial application of its own results. Initially, it was determined the solubility of the model-system monopentaerythritol in water to infer from this result some thermodynamic parameters, specific heat and heat of crystallization, which are necessary to a possible crystallizer design. Afterwards, it was done the optimization of the crystallization parameters in seeded cooling batch of the model-system, by monitoring suspension tubidity, and refractive index of solution and chord length distribution of the crystals, in three different scales: 0,35 L in reactor of 0,6 L, 1,05 L in reactor of 2L, and 6,2 L in reactor of 9L. In-line monitoring of system properties, as well as the measurement of crystal size distribution and measurements of optical microscopy of seeds and final product, allowed the optimization of kinetic parameters, considering the existence of agglomeration in two of the three studied scales. With the obtained kinetic parameters, the extrapolation of them to other scales was tried. This scale up was not possible, but it was utilized the kinetic parameters obtained in the 9 L reactor to design a crystallization system, considering two crystallizers: one larger of 40 m³ suitable to product an intermediate chemical as pentaerythritol, and a smaller one of 2 m³ considering the system as a specialty chemical. The simulations carried out, utilized in the design of the crystallizers, allowed to verify that there is limitation in heat exchange of the larger designed crystallizer which hinders the imposition of non-linear cooling profiles, normally indicated in scientific papers as adequate solution to improve the performance of produced crystals. This limitation does not exist in the smaller designed crystallizer, which allows imposing non-linear cooling profiles and maximizing the performance of crystalline product, by obtaining larger crystals with narrow size distribution.
Composição e distribuição de coleoptera aquáticos (insecta) em córregos de baixa ordem no Estado de São Paulo, Brasil
(Universidade Federal de São Carlos, 2007-05-04)
Segura, Melissa Ottoboni
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Gessner, Alaíde Aparecida Fonseca
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https://lattes.cnpq.br/8465752836529703
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https://lattes.cnpq.br/5081348804259676
The beetles are an important part of the insect fauna of most aquatic ecosystems. However, with the exception of the Elmidae, they have not been used extensively for water quality evaluation. This is due in large part to the fact that most water beetle adults and larvae, with the exception of the elmids, some adult Dryopidae and larvae Psephenidae, are air-breather and do not depend on dissolved oxygen in water for respiration. However, many beetles appear to live and reproduce in restricted aquatic habitats, thus can colonize the smallest water bodies, and the loss of those habitats may mean a loss of those species. And, if a high diversity of species is indicative of good water quality, then the high diversity of beetles in an aquatic environment is certain important. The main goals of this study were to evaluate and to compare the impact on the beetle fauna from small streams in reference (Conservation Areas), sugar-cane agriculture and Eucalyptus plantations and pasture areas. The main question addresses here was: which are the main consequences for diversity and abundance of beetles with deforestation of riparian vegetation. In this study were visited six Conservation Areas where 20 streams were sampled and three landscape impacted areas by sugar-cane agriculture and Eucalyptus plantations and pasture, where 14 streams were studied. The results showed a high diversity of Coleoptera have been identified 49 genera, of which 44 genera were collected in reference areas and only 17 genera were registered in impacted areas. The family Elmidae comprised 83.47% of the 1506 specimens from conservation areas. However in the impacted areas the family Hydrophilidae was more abundant, it represented 34.8% of the 87 specimens collected in these locations. The results of physics an chemistry of the water variables did not show much differences between both situations (Conservation and impacted areas), however the deforestation of the riparian vegetation was a determinant factor in the alteration of the composition, diversity and abundance of beetles in the studied streams.
Adoção da tecnologia da informação na pecuária de corte
(Universidade Federal de São Carlos, 2007-05-10)
Machado, João Guilherme de Camargo Ferraz
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Nantes, José Flávio Diniz
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https://lattes.cnpq.br/1900976112613026
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https://lattes.cnpq.br/8648672926501949
Information Technology (IT) starts to play an important role in the day-by-day, changing the way the cattlemen manage their properties. IT affects business management as it allows for search, access, storage and dissemination of information, improving the decision-making process. Besides softwares and agribusiness websites, IT includes electronic devices for storage of sanitary, nutricional and genetic information; television channels and telecommunications structure. This research aimed to study the use and the diffusion of IT in the beef cattle breeding, from the analysis of the factors that have influenced its adoption; to describe resources, procedures and necessary actions for IT operation; to segment (classify) rural enterprises by their technological level; and to elaborate suggestions to intensify the IT uses in the cattle breeding business. The research was performed in two stages, quantitative and qualitative. In the first stage, a survey with producers was performed. Information concerning the different technologies adopted and the attitudes taken with IT, enabled to identify the level of innovativeness of producers. It was possible to classify them by the similarities of the technological position. The second stage analyzed experiences, opinions and perspectives regarding the technology integrated to the productive system. Two properties were analyzed by each category, totalizing ten case studies, by personal interviews. The results indicated the reasons of the adoption or rejection of a certain IT by the producers, allowing for the identification of the reasons why some producers have adopted it more quickly than others. It was possible to understand the modifications in the rural organization due to IT adoption, as, for example, improvement in managerial skills. Altogether, the processes have been improved and became easier, with positive consequences in several areas, including human resources and the enterprise s image in the market.
O professor de matemática e seus saberes e suas necessidades em relação à sua disciplina
(Universidade Federal de São Carlos, 2007-05-11)
Neves, Marcos Rogério
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Pierson, Alice Helena Campos
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https://lattes.cnpq.br/2520482268922110
This work is a result of the research about the characteristics of the knowledge related to specific content of mathematics matter that a teacher is developing/reworking throughout his professional career. This is a case study, which the participant has the characteristics to be egress of the university course of the education of mathematics teachers; to have sought specific training in mathematics after three years of the professional practice and have a positive relationship with math and with their work. The design of teacher s knowledge that served as the basis emphasizes the social and discursive dimension of knowledge, proposing consider it as an expression of the practical reason, which belongs more to the fields of argument and the trial, than the fields of cognition and of information. We associate to the concept of knowledge the notion of relationship with knowledge, which guides us to consider the contexts and practices, in which the teacher is mobilizing to learn, or mobilize their knowledge in their interaction with students, the school team, with teaching materials and with the circumstances and demands of the profession. Through interviews, investigate how these contexts and practices influenced the construction of logical structure (requirements of rationality) of the teacher's way of thinking, over his career, especially considering the content of mathematics with which he works. Among the results of the research, we noticed that extent, the consistency, organization, the mechanisms for selection and improvement of knowledge of the teacher, concerning to the content of mathematics, are very influenced by the nature and function of their activity and, thus, for his practice in different situations and contexts linked to school. Throughout his career, he presents an authentic (and enviable) mobilization to learn that feeds the process of acquisition and updating of their knowledge, from their professional needs. However, in their experiences into the course of the education of mathematics teachers he found little support to reflect and improve their knowledge and their practices. Considering that the requirements of rationality are the conditions of intelligibility that a person need for the speech and its action their and the other make sense and are acceptable as evidence of a coherent dialogue, we noticed that the experiences of this subject in the universitary course little nurture the dialogue between the higher-level math and its knowledge, leaving, one hand, of to contribute in a meaningful way with their problem and thinking about the content, on the other, working to consolidate perspective in which their knowledge had been constructed to from their practice.
Caracterização limnológica e inventário de diversidade das comunidades de macrófitas em cinco lagos tropicais: composição florística, biomassa e macroinvertebrados associados
(Universidade Federal de São Carlos, 2007-05-11)
Tavares, Katia Sendra
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Rocha, Odete
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https://lattes.cnpq.br/7577441794992601
In the present study five tropical lakes located in Minas Gerais State were studied. The methodology followed the scheme of rapid inventories of aquatic diversity as used in the AquaRAP Program. Four lakes belonging to the Lacustrine System of the Middle Rio Doce Valley (Carioca, Verde, Águas Claras e Almécega) were sampled in the rainy (December 2003) and dry (May 2004). Tropeiros Lake located in the wetlands of Piumhi River backwaters, a River formerly belonging to Rio Grande basin, but that had its course changed to São Francisco basin, was sampled in October 2006, at the beginning of the rainy season. The lakes of the Middle Rio Doce Valley had high water transparency (Secchi Disk readings varying from 2.0 to 2.9m), low water conductivity (20 to 38 µScm-1), pH slightly acid to slightly alkaline (6.2 8,4) and well oxygenated (3.9 to 7.8 mg/L). All lakes were mesotrophic in December, 2003 (Total P varying from 17.38 to 21.62µg/L), but oligotrophic in May, 2004, except Lake Carioca which was mesotrophic. Tropeiros Lake was found to be mesotrophic at the sampling time. Total P varying from 23.2 a 45.4 µg/L) pH varying from neutral to alkaline (7.0 to 9.2), moderate water conductivity (39.6 to 54.7 µScm-1) and oxygen concentrations varying from low to moderate (1.5 a 6.1mg/L). The occurrence of a El-Niño event in the years of 2002 and 2003 altered the regional pluviometric regime in the region of the Valley of the Middle Rio Doce, MG, causing almost 40% reduction of the total annual precipitation, with a marked decrease of the lakes water level. As a consequence, macrophyte communities richness was low, with a total of 20 species of macrophytes only. On the other hand a high species richness was observed in Tropeiros Lake, with a total of 28 species registered. Among the studied lakes in the Middle Rio Doce Valley no relationship was found between the biomass of macrophytes per unity area and the size of the lakes nor between the amount of biomass and the trophic state of the lakes. In all five lakes studied the macroinvertebrates communities associated with macrophytes were mainly constituted by Chironomidae (Diptera) a pattern found in freshwaters world wide. A linear positive relationship was found between the macrophyte biomass and the associated macroinvertebrates biomass in Tropeiros Lake. Tropeiros Lake, although inventoried once had a higher macrophyte taxa richness, higher macrophyte biomass and higher associated macroinvertebrates biomass, probably representing a hot-spot of diversity for both, macrophytes and associated macroinvertebrates communities.
Pesquisa participativa no Rio São Francisco, região de Três Marias-MG: contaminação ambiental e comunidade pesqueira
(Universidade Federal de São Carlos, 2007-05-12)
Silva, Erida Ferreira Araújo
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Mozeto, Antonio Aparecido
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https://lattes.cnpq.br/6594211224864538
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https://lattes.cnpq.br/7837125898429377
The increasing public recognition of environmental degradation and inequitable use of natural resources drives the search for environmentally sustainable and socially equitable resource utilization. In this search context is recognized the necessarily considers different spheres that make up a complex environmental problem including environmental, social, economic and cultural questions. This recent change in perspective and paradigm allows scientific knowledge to authoritatively trump other types of knowledge, such as traditional knowledge developed from the culture and way of life of traditional extractive communities. To develop a scientific research project that considers popular knowledge was used the action-based research perspective on the metal contamination evaluation in the Sao Francisco River trough the water, sediment and muscle fish metals evaluation. The results were compared with the specific environment quality criteria and indicated that the waters of the Sao Francisco River in the area influenced by VM are primarily contaminated by zinc and manganese, at levels that violate the resolution 357/05 of the Brazilian National Environment Committee (CONAMA) in two points during the dry season. In the rainy season, contamination is more serious, as more violations of the CONAMA Resolution 357/05 are found for a variety of metals (Cd, Mn, Pb, Zn, Cu e Fe). This is probably due to run-off from soils with residual deposits, increased percolation from retention ponds, and increased quantity of suspended material in the water with potential to aggregate metal contaminants. For sediments in the study area, there are worrisome metal concentrations that exceed this tabulated Severe Effect Limits (SEL) by up to 16 times, indicating a strong probability that the sediments are causing an adverse effect on the biota and contributing significantly to the degradation of water quality. With respect to contamination of fish, of the 54 fish analyzed, only one showed concentrations of metals above the limits for human consumption established by decree 685/98 of the National Agency for Health Vigilance (ANVISA). Another results were multi-stakeholder involvement in an environmental problem through participative tools, promoting the exchange of different types of knowledge, fosters dialogue between different actors involved in the same socio-environmental context, and promotes the insertion of research into the context of the complexity in which the demand for it developed. Science is thus applied in favor of the community in search of sustainable livelihoods and environments.
O processo de capacitação para a produção enxuta: estudo de caso na Volvo do Brasil
(Universidade Federal de São Carlos, 2007-05-14)
Meirelles, Helena Teixeira
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Alliprandini, Dário Henrique
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https://lattes.cnpq.br/5866457906977135
Most companies attempting to implement Lean Manufacturing have focused only on the manufacturing process (tools and techniques) and have ignored the cultural aspects, essential to the change management process. This explains the partial success they have experienced in their efforts to become lean and is largely related to an inefficient qualification process, which were not enough to develop the competencies demanded by this production system. In order to understand better and to analyze how companies are qualifying their employees, this work has the objective to characterize and to analyze the qualification process developed by a company that has been going through a comprehensive lean transformation process. The characterization accomplished help us to understand how companies can qualify their employees in Lean Manufacturing System and how they can structure their qualification process in order to develop the competencies demanded by this paradigm. The analysis of the field research s results consisted in positioning the qualification process found against the studied theory, providing important insights about the direction future qualification activities should be addressed or about the way they should be drived. In the theory field, it is important to emphasize the contribution of the framework developed, which gathered and related different dimensions (critical elements) of Lean Manufacturing System, helping the investigation and analysis of the guidelines to the qualification process for this Production System.
Fases geométricas e invariantes dinâmicos em mecânica quântica
(Universidade Federal de São Carlos, 2007-05-16)
Duzzioni, Eduardo Inácio
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Moussa, Miled Hassan Youssef
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https://lattes.cnpq.br/7828776012924524
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https://lattes.cnpq.br/7783163368484914
The increasing interest to understand the geometric phases (mainly due to the possi- bility to achieve geometric quantum computation robust against some kind of errors) and the search for new techniques to solve time-dependent problems in Quantum Mechanics, are the topics approached in this thesis. i) Within nowadays technology, it is presented a scheme to control and measure the nonadiabatic geometric phases in cavity quantum electrodynamics. In this context, it is possible to generate superposition states of the cavity mode which acquire relative phases of purely geometric character, termed the geometric Schrödinger cat-like states. ii) For two interacting Bose-Einstein condensates in the two-mode approximation, modeled by a Hamiltonian whose parameters are time dependent, the nonadiabatic and noncyclic geometric phase acquired by the state of the system is analyzed. For this purpose, analytical solutions of the Schrödinger equation are obtained in di¤erent regimes of parameters. Connections between the constants of motion associated to each solution and the geometric phases are established. The e¤ects of the time-dependent parameters on the geometric phase as well as the population imbalance and relative phase between the two condensed components are analyzed. iii) Starting only from the parallel transport condition, it is presented a general de…- nition of the geometric phase acquired by the basis states of a system. The de…ned phase generates gauge invariant observables which apply to a general scenario of adiabatic or nonadiabatic, cyclic or noncyclic, and transitional or nontransitional evolutions of pure or mixed states of the system. Several results presented in the literature are recovered. iv) Finally, together with some considerations about the dynamical invariant tech- nique, it is presented an alternative method to obtain the density operator of two level systems. Preliminary results show that this method can be extended to dissipative as well as interacting two level systems, such as spins-1=2 chains
Uso de métodos clássicos e bayesianos em modelos de regressão beta
(Universidade Federal de São Carlos, 2007-05-18)
Reitman, Diomedes Pael
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Diniz, Carlos Alberto Ribeiro
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https://lattes.cnpq.br/3277371897783194
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https://lattes.cnpq.br/0290791444723891
This work involves a study of a regression model appropriated for situations which the response variable is measured in a continuous scale in the (0, 1) interval, as, for instance, taxes or proportions. The developed inferences were based on the Classic and Bayesian methodology. A discussion about the application of the beta regression model is presented.
Síntese de ácidos anacárdicos e análogos, candidatos a inibidores da enzima gliceraldeido-3-fosfato desidrogenase glicossomal de Trypanosoma cruzi
(Universidade Federal de São Carlos, 2007-05-18)
Pereira, Junia Motta
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Corrêa, Arlene Gonçalves
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https://lattes.cnpq.br/7425467156776144
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https://lattes.cnpq.br/6882588789482791
Chagas disease, caused by Trypanosoma cruzi, is endemic in 15 countries in Latin America, including Brazil, and it is estimated that about 16 million people are infected by this protozoan. The enzyme glyceraldehyde-3- phosphato-dehydrogenase (gGAPDH) is one of the nine enzymes involved in the T. cruzi glycolysis and experimentally it was proved that inhibition of this metabolic pathway causes the elimination of trypanosomes in the bloodstream. Among several natural products that have presented interesting inhibitory activity against this enzyme are the anacardic acids, isolated from cashew-nut shells. Many biologic and/or pharmacologic properties have been described for this class of compounds. In this work a serie of anacardic acids and analogues were synthetized and their biological activity evaluated . In total, 23 compounds were prepared and evaluated against T. cruzi gGAPDH and Schistossoma mansoni purine nucleoside phosphorylase (PNP) enzymes. In both cases the most active compound was 6-n-decylsalicylic acid with IC50 of 55 and 30 M respectively. Through the analysis of the experimental results together with the molecular dock studies, it was possible to observe that the size and substituents of alkyl side chain in these compounds can influence the inhibitory activity and the free hydroxyl groups in the ring are essential for the activity.
Estudo do mecanismo eletroforético de coleta na filtração de aerossóis
(Universidade Federal de São Carlos, 2007-05-18)
Mello, Rafael Lopes Seabra de
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Gonçalves, José Antônio Silveira
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https://lattes.cnpq.br/0337997526924402
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https://lattes.cnpq.br/8445153978573450
Previous works have shown that the presence of electrostatic forces in particles significantly affect the performance of a filter, both increasing collection efficiency and reducing pressure drop. Recently, in the Environmental Control research group of the Chemical Engineering Department of UFSCar, Rodrigues (2005) have studied the filtration of electric charged phosphate rock particles in polypropylene filter, observing the influence of the charge acquired by the particles in collection efficiency and pressure drop. The aim of the present work is to analyze the particle trajectory during filtration and the contribution level of each collect mechanism present in the process, in order to theoretically detail the results obtained by Rodrigues (2005) and propose a model for the electrophoretic mechanism of collection that better fit in experimental data.
Crianças com dificuldades em resolução de problemas matemáticos : avaliação de um programa de intervenção
(Universidade Federal de São Carlos, 2007-05-22)
Moura, Graziella Ribeiro Soares
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Rose, Julio Cesar Coelho de
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https://lattes.cnpq.br/3386857761295187
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https://lattes.cnpq.br/1641162974335637
The comprehension of written texts continues being one of the most difficult academic practices for students of Basic Education. If comprehending a written material in linguistic terms brings out difficulties for some students, a text written in mathematical language can be even more difficult, because besides the mother language understanding, mathematical concepts are also needed. A lot of research has been done to try to find better ways to help children understand what was asked in mathematical problem-questions. However, there is a lot to be done to understand the difficulties and processes of problem resolution and about basic conceptual comprehension present in mathematical problems instructions. In this sense, the purpose of the present study was to elaborate, apply and evaluate an intervention program performed with children in the fourth year of Elementary School who showed difficulties comprehending and solving mathematical problems, and maximize their cognitive capacity. The methodology chosen was the experimental delineation of comparison between groups, an experimental and a control group. The study consisted of a pretest, an intervention program, a post-test and a delayed post-test. The pretest evaluated the children s performance in resolving arithmetical problems. Next, the teaching program was used with students who showed performance under 40% right in problems. This aimed to develop, in the students, enough knowledge to increase their resolution capacity of mathematical problems. That program sought to teach students to read mathematical problems instructions and find the most appropriate mathematical representation to solve the question. For this, it was necessary to teach the arithmetical operations concepts, since one of the children s difficulties was connected with understanding the meaning of each operation (addition, subtraction, multiplication and division) and its symbolic representation. The post-test and delayed posttest results for the experimental group were superior to the pretest results for the experimental and control groups, indicating an improvement in performance for the students who took part in the program. Those data showed that the intervention utilized was efficient, increasing the cognitive capacity necessary to the task of resolving arithmetical problems, which basically consists of comprehending written instructions and representing them mathematically.
Uso do algoritmo ICM adaptativo a descontinuidades para o aumento da resolução de imagens digitais por técnicas de reconstrução por super resolução
(Universidade Federal de São Carlos, 2007-05-22)
Martins, Ana Luísa Dine
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Mascarenhas, Nelson Delfino d'Ávila
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https://lattes.cnpq.br/0557976975338451
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https://lattes.cnpq.br/9249940379843542
Super resolution image reconstruction consists in using a set of low resolution images from the same scene to generate a high resolution estimate of the original scene. For that purpose, all the observed low resolution images need to have sub-pixel displacements among each other. In this way, there is more than just the same information replicated in each image and then the uncertainty inherent to the displacements can be used as additional information to increase the spatial resolution. This master s thesis proposes a Bayesian approach for the super resolution reconstruction problem using Markov Random Fields and the Potts-Straus model for the image characterization. Therefore, it is possible to incorporate previously known context spatial information about the high resolution image to be estimated. Moreover, a discontinuity adaptive ICM algorithm was used to estimate the maximum a posteriori solution. Using an initial high resolution estimate constructed from the registration and interpolation of all the observations made it possible to reconstruct an image that respected the initially presented discontinuities. We also observed that the resulted high resolution image hold finner details when compared to the initial estimation.
A ética skinneriana e a tensão entre descrição e prescrição no Behaviorismo Radical
(Universidade Federal de São Carlos, 2007-05-23)
Castro, Marina Souto Lopes Bezerra de
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Rose, Julio Cesar Coelho de
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https://lattes.cnpq.br/3386857761295187
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https://lattes.cnpq.br/7823256809341659
From the description of Skinner's theory since its beginning, we can understand the course which falls into ethical questions. Skinner asserts that the science of behavior can also be the science of values, that is, it can explain, it can describe, what we mean by values and what is being ethical, act in a way called ethical. Furthermore, the author argues that, from the radical behaviorism and its selection by consequences theory in the three levels, it is possible to elect a primary value, which can be the guide for somebody who engages in the project of cultural practices in a deliberated fashion. In this way, Skinner assumes a prescriptive attitude, as well as tries to reduce it to a descriptive scope. There it is a kind of tension in the Skinner's texts, because, besides describing the good of the culture, the author elects this value as the primary value. He tries to justify this election appeling to descriptive arguments, but, finally, he cannot find any "good reason". We assume that it is possible to originate ethical precepts from radical behaviorism, nevertheless radical behaviorism is not suficient to justify the choice of one or another precept. We cannot choose, only from its premises, the good of the culture, or the good of others, or the personal goods as the main value, since there are not enough arguments within the theory itself. If we want to explain why we choose this or that precept, on the point of view of the behavior analysis, we must look at the who-makes-the-choice history of contingencies.
Avaliação dos mecanismos de Privacidade e Personalização na Web
(Universidade Federal de São Carlos, 2007-05-23)
Lobato, Luanna Lopes
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Zorzo, Sérgio Donizetti
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https://lattes.cnpq.br/2523715806470871
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https://lattes.cnpq.br/4980327889869289
In web services two points should be considered that end up conflicting: i) the user's right to have his privacy guaranteed and ii) the need of having the services personalized, providing a better user interaction on the Internet. The user's information, with regard to privacy, should be maintained in secrecy, so that the person in question would not feel threatened when using the service. When thinking about personalization, the information should be known and filtered, in a way that makes it possible to discover the most relevant information, so that, together with personalization techniques, they can be used by the sites. This work presents the steps taken for the development of a tool, PrivPerson , capable to analyzing the privacy and personalization mechanisms, being: tools, sites and use sceneries in a way that quantify/measure how much privacy and personalization they offer for the users. For such measurements, a base the taxonomies of classification of privacy and personalization was used, developed in this work and imposed in layers, in a way that it is possible to quantify the privacy and personalization level of offered to the user by the observation of which layers the mechanism meditates. The mechanisms analysis for the proposed tool had the goals to supply the users quantitative values that aid the user in the context of use services. Apart from the above, a Case Study was developed with the objective of identifying the use of the taxonomies on sites, and to compare the manual evaluation on the sites, done in the Case Study, with the automated evaluation found in PrivPerson . With base in this study, it was observed that the sites doesn't have a standardization in the development of their Privacy Politics, based on this, a standardization was developed for such politics, approaching information that are relevant be introduced to the users by the sites.
Efeitos da adição de aminoácidos essenciais livres à dieta e da ausência de nutrientes na atividade de enzimas digestivas e no metabolismo intermediário de juvenis de matrinxã (Brycon amazonicus)
(Universidade Federal de São Carlos, 2007-05-25)
Camilo, Rodrigo Yamakami
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Moraes, Gilberto
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https://lattes.cnpq.br/4427903557163246
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https://lattes.cnpq.br/6399985363412772
For the nutrients ingested by fish are used for growth and maintenance of the energetical metabolism, they need firstly being absorbed by gastrointestinal tract. However, the most foods ingested cannot be absorbed directly through the gastrointestinal mucosa, since they are largely formed by high molecular weight molecules. The process of transforming large molecules into smaller is catalyzed by digestive enzymes. Therefore, a limiting factor to the food absorption is the availability of those enzymes. Their synthesis and the secretion can be stimulated by free amino acids in the gastric and intestinal lumen. We have investigated the effect of free essential amino acids (AAEL) supplementing the diets on the synthesis of digestive enzyme and the intermediary metabolism of matrinxa. Six fish groups were submitted to different feeding condition for 15 days. The control group was fed with 34% of protein and 4.670 kcal of gross energy by kg of food. Maize starch and soy oil were used as energy source. The second group, called SO, was fed with casein and gelatin as protein source and maize starch as energy source. The third group, called SO+AAEL, was feed with a similar food wherein the 0.6% of cellulose, added as inert stuff, was replaced by a mixture conteining 0.1% of phenylalanine, 0.1% tryptophane, 0.1% valine, 0.1% histidine, 0.1% arginine and 0.1% leucine. The fourth group, called SA, was feed with casein and gelatin as protein source and soy oil as energy source. The fifth group, called SA+AAEL, was feed with a similar food but 0.6% of cellulose was replaced by a mixture of six AAEL, just as above. The last group was kept in fast over the experimental period. After the experimental period, 9 fish from each treatment were sampled. The blood was withdrawn and white muscle, liver and digesting treat were excised. The amylolytic, proteolytic and lipolytic activities assayed in digestive tract homogenates were responsive to diet composition, mainly to the absence of starch and the addition of FEAA. The present set of data indicates that the matrinxa is able to adjust these enzymes production toward digestive process optimization. The alterations in plasmatic, muscular and hepatic metabolic intermediaries concentration become evident that the matrinxa is able to adapt its intermediary metabolism to the changes on the feeding condition to preserve vital functions. However the increase of the enzymatic activity in the fed with the diet AAEL did not result in significant modification on the intermediary metabolism.
A sexualidade como aspecto inclusivo : uma proposta de intervenção para pais e professores de jovens com deficiência mental
(Universidade Federal de São Carlos, 2007-05-26)
Albuquerque, Paloma Pegolo de
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Almeida, Maria Amélia
;
https://lattes.cnpq.br/6930633065111660
The matter of sexuality in mental retardation still generates mistakes and prejudices. Parents and teachers, for example, often find difficulties over this subject, depriving people with mental retardation of having effective access to sexual orientation and, therefore, of reaching more autonomy and personal fulfillment. This work had as main objective to investigate what parents and teachers think about the sexuality of their sons and daughters as well as students with mental retardation, aiming to draw and introduce an intervention proposal. First of all, 17 parents and 23 teachers from one special school were interviewed with regards to picking necessary information to subsequent intervention. It was aimed, by means of a semi-structured interview script made by the researcher, to know more about the participants viewpoints and opinions about issues related to sexuality in general, to sexuality in mental retardation and to sexual education/orientation behavior towards their children/students, as well as their main needs and doubts. Then, a course named "Sexuality and mental retardation" was offered to two groups of participants: one for parents and other for teachers. The course was carried out on weekly meetings, summing up eight meetings with each group (two months on the whole). Such meetings had a theoretical part and moments to discuss the difficulties and needs related by participants, with discussions, dynamics, role-playing and problem-solving activities, movies and others. After the intervention, new interviews with the parents and teachers were made to check the effects of it. The qualitative analysis of the results was made based on information got in pre- and post-intervention and on the assessment of the questionnaire results about the course answered by the participants, that were grouped in categories; besides, all practical activities taken in the course were described and analyzed, like the Instrument for registration of sexual behaviors of children/students and the Activity in class for teachers. Some signs of changes in the participants' opinion were noticed, like an enlargement of reflections about the sexuality - mental retardation subject, and a perception of the importance of sexuality in the lives of people with mental retardation, as well as a greater attention and respect for their emotional-sexual interest and needs. Some attitude changes were also noticed, like a predisposition to act the right way when facing sexuality-related situations by means of a greater questioning of their role in this process; as well as an increase in confidence and preparation to deal with the subject. Besides, we noticed some behavior changes regarding sexual orientation, like an increase in dialogue about sexuality. Nevertheless, given the needs and difficulties presented by the populations of parents and teachers of people with mental retardation, new studies in the area are still recommended.
Atividade curricular de integração entre ensino, pesquisa e extensão (ACIEPE) : anseios, conjunturas e contornos de inovações curriculares em movimento.
(Universidade Federal de São Carlos, 2007-05-28)
Souza, Marcos Lopes de
;
Freitas, Denise de
;
https://lattes.cnpq.br/2396459642306557
This research describes and discusses about the conjuncture and the movements of the program so-called as Curricular Integration Activity between Teaching, Research and Outreach (ACIEPE) since its implantation in Sao Carlos Federal University from year 2002 up to 2006, analyzing in a focused way one of its proposals. During the investigation the information have been acquired by interviews with the Program s idealizers and executers, also by the Program s (ACIEPE) documents, questionnaires applied to the coordinators of the program proposals, the registries of one of the program s proposal meetings and by interviews realized with the participants of this experience. The ACIEPE Program had been created during a period in which UFSCar was trying to consolidate itself as a University based on the concepts of democratic participation, academic competence and Social commitment, a perspective that contested the neoliberal politics, which, has occupied a large area into University space. The implantation of the program occurred within a period in which UFSCar s graduation courses were passing through a curriculum reformulation process that began since the establishment of Brazilian Universities Institutional Valuation Program (PAIUB). Initially, the ACIEPE was incorporated to the courses s curriculum as an elective discipline, lately, within the curricular flexibilization, it happened to be a complementary curricular activity. Within the period comprehended between the years 2002-2006, 49 different proposals were done, some of them were re-offered, and now 107 classes can be counted in. New projects of ACIEPEs have been offered each semester (at least five), at the same time, new professors have adhered to different proposals of ACIEPEs demonstrating that the program have been recognized as an opportunity for curricular innovation. Because of the thematics that were chosen, the outreach guidelines, the external public and the methodological approaches, the ACIEPEs presented different faces, which made it different from traditional academic spaces. The proposals of ACIEPEs were consolidated as educative spaces; constituted especially by multidisciplinary teams, which involved learning and professors from distinct majors. In those spaces the formation offered to the graduation students could embrace things beyond the society of the knowledge, involving aspects like citizenship, social equality, environment sustainability, social cooperation, Human values and etc., increasing the student s knowledge experiences, which includes the interaction with different social groups. The practice of the inseparability between teaching, research and outreach at ACIEPEs occurred in a diffuse and incipient manner, overall, when it comes to the interlocution between university and External community. Focusing on one of the experiences of the ACIEPE program entitled as The comprehension about biological knowledge essence and its relationship with Science and biology on Basic Education it could have been evidenced that the ACIEPEs program s intentions were approximately reached, especially the ones related to the construction of a space that could give to the graduation students also professional education and citizenship, even, establishing a strong link between University and several social segments. At the same time, this ACIEPE, basing on its specific objectives and on the perspective of complexity, can be denominated, besides its own limitations, as a curricular innovation, based on the construction of dialogue spaces among the disciplines, whereas it made possible to the participants, especially, the biology teachers and the undergraduate level students of biological sciences course, to find a new significance for the nature of biological knowledge trough the articulation with Philosophy and sociology.
Avaliação de um critério de equivalência entre dados de tração a quente e fluência em aços
(Universidade Federal de São Carlos, 2007-05-28)
Santos, Noeli Bragalda dos
;
Bueno, Levi de Oliveira
;
https://lattes.cnpq.br/0333912025909549
;
https://lattes.cnpq.br/6389344977532376
This work was conducted in four stages, the first to understand the phenomena that affect the 2.25Cr-1Mo steel hot tensile in different conditions, observing their behavior in a wide range of temperature and strain rates, to complete the initial study of Reis Sobrinho [10], that employed the following test conditions: Crosshead speed (VC) = 20; 5; 1.0; 0.1; 0.01 mm/min and Temperatures (T) 500, 550, 600, 650 and 700°C. In the present study were used to further test the parameters of: VC from 200 to 0.001 mm/min and Temperatures: room temperature, 100, 200, 300, 400 and 450°C providing more complete information of the behavior of the material. The third step aimed to achieve the detailed analysis of the data set of the hot tensile and creep for 2.25Cr-1Mo steel in applying the criterion of equivalence, emphasizing that this range of data provided by testing, had increased because of bibliographic information obtained with the same steel at different test conditions in the temperature range from 500°C to 600°C generated by Klueh [48,49] and Klueh & Oakes [50 52]. The analysis of these parameters, which consisted in verifying the validity of the criterion of equivalence proposed for 2.25Cr-1Mo steel, closes the first stage of this work, starting a fourth phase, to verify the reliability of the methodology proposed for other materials, in which the same type of analysis was applied to the AISI 310 steel. The closure was to attempt preliminary creep study in 2.25 Cr-1Mo steel at room temperature, whose possible existence was indicated by analysis of the tension data applying the criterion of equivalence.