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Preparação e caracterização de nanocompósitos de LDPE e LDPE/EVA com partículas de Ag/TIO2 para aplicações antimicrobiais
(Universidade Federal de São Carlos, 2009-10-02)
Olyveira, Gabriel Molina de
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Pessan, Luiz Antonio
;
https://lattes.cnpq.br/8276650236213537
;
https://lattes.cnpq.br/1681746201551274
This study investigated the use of a charger inorganic (titanium dioxide) as a support for silver nanoparticles and evaluated the use of material obtained as filler in polymer for antimicrobial application.Silver nanoparticles-titanium dioxide were synthesized by the reduction method developed by Turkevich, also known as a method of citrate. Therefore, we used three different types of titanium dioxide in the colloidal synthesis and found that nanometer titanium dioxide showed better results for the deposition of silver nanoparticles. Silver Nitrate was reduced by sodium citrate with and without the presence of a surfactant (PVP-Polyvinylpyrrolidone) resulting in a stable suspension of nanoparticles of silver / titanium dioxide. We also tested NH4OH (ammonium hydroxide) to prevent the growth of nanoparticles during the reaction. Nanocomposite of LDPE and LDPE / EVA were produced by mixing in the molten state with the Ag nanoparticles-titanium dioxide resulting from the colloidal synthesis. By assessing the rheological, thermal and morphological analysis we found that compared with nanocomposite LDPE / EVA, LDPE nanocomposite showed better results with regard to dispersion of the charges, but nanocomposite LDPE / EVA showed better results in antimicrobial assays due to the polar nature the grouping of EVA able to bind more easily to inorganic fillers.
Caracterização ótica não-linear em cerâmicas ferroelétricas transparentes (CFT s) de PLZT: TR (TR = nd,Ho, Er, Tm e Yb)
(Universidade Federal de São Carlos, 2009-10-02)
Milton, Flávio Paulo
;
Garcia, Ducinei
;
https://lattes.cnpq.br/5236758856687873
Lead titanate zirconate modified with lanthanum, or PLZT, is one the most ferroelectric compounds utilized in electronic devices, due to its versatility and low production costs in comparison with single-crystalline materials. When adequately prepared, this system presents good optical (high optical transmission) properties, in the visible and near infrared range, and can be electro-optically characterized. Recently, in the end of 90 s, it was verified its high potential as host of photoluminescent ions, as the lanthanide (rare-earth) family. The possibility to use its electro-optic properties (due to its ferroelectric characteristics) and its photoluminescent properties (achieved by the doping process) together ,enlarges the range of application of this system. In this way, the electro-optical characterization of doped PLZT ceramics becomes essential, besides the photonic characterization. In this work, the Senarmont compensator method for electro-optical characterization, or dynamic method, was instrumented, and the values of the induced (due to the quadratic electrooptic effect, Kerr) and permanent (due to the linear electro-optic effect, Pockels) birefringence were determined as a function of the temperature, wave-length and electric-field frequency, of the rare-earth (Nd2O3, Ho2O3, Er2O3, Tm2O3 e Yb2O3) doped PLZT, with La/Zr/Ti=9/65/35, ceramics. The results shown a relationship between of the electro-optic (electro-optic coefficients, or birefringence values) and the dielectric, ferroelectric and structural properties (studied in others works) of the ceramics, that were related with the site occupancy and the structural defects due to the aliovalent dopant. It also can be identified two distinct birefringence dependence as a function of the electric field, for the same electro-optic effect (Kerr, or Pockels), identified as a function of the doping process. In the case of electro-optical characterizations in function of the variable frequency, was observed an agreement with the characterization ferroelectric results made in other works in GCFerr, being evidenced the reduction of electro-optical properties with increasing frequency, where if it observed the occurrence of anomalies in the Pockels response with direct influence on the response Kerr. The characterization as a function of wavelength showed the occurrence of two types of behavior depending on the dopant ion used, being one of them the reduction of the values of birefringence with increasing wavelength (the samples pure and doped ions neodymium (Nd) and ytterbium (Yb)), with a tendency to expected behavior in the literature, however, in the second was seen irregular increase birefringence with increase wavelength (for samples doped with ions holmio ( Ho), erbium (Er) and thulium (Tm),not existing relation with to the theoretical models adopted. In relation the characterization as a function of temperature, this was carried through in a temperature interval that understood the characteristic temperatures of systems relaxores (freezing temperature (TF), the maximum dielectric permittivity (TM (e)) and Burns (TB)), except for the sample doped with neodymium ions, whose freezing temperature is below interval worked. By the curve of birefringence (Δn) as a function of temperature was possible to determine the temperature of maximum birefringence for each of the samples, correlated them with each other. Through the curve (d Δn / dt) vs. T was possible to identify a relationship between the maximum variations, positive and negative birefringence with the temperature characteristics TF and TB.
Efeito Aharonov-Bohm: extensões auto-adjuntas e espalhamento
(Universidade Federal de São Carlos, 2009-10-05)
Pereira, Marciano
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Oliveira, César Rogério de
;
https://lattes.cnpq.br/5485204156806697
;
https://lattes.cnpq.br/5082255083350460
In this work we present a study of topics related to the Aharonov-Bohm (AB) e®ect. Our framework is that of nonrelativistic quantum mechanics and we use the point of view of mathematical physics. (1) We study the solenoid of finite length and zero radius and compare their self- adjoint extensions with the known case of the solenoid of infinite length and also of zero radius in the plane. (2) By considering an infinitely long cylindrical solenoid of radius greater than zero, mainly in the plane, we present a classification of all self-adjoint SchrÄodinger operators (i.e., the possible boundary conditions on the solenoid border) that mathematically could characterize the AB operator, whose domains are contained in the natural space of twice weakly di®erentiable functions (and, of course, also square integrable). (3) We then consider the traditional Dirichlet, Neumann and Robin boundary conditions on the solenoid border and calculate and compare their scattering matrices and cross sections. Hopefully this could be used to experimentally select one of such extensions. (4) Finally, we discuss a theoretical mechanism we propose to select and so justify the usual AB hamiltonian with Dirichlet boundary conditions on the solenoid. This is obtained by way of increasing sequences of finitely long solenoids together with a natural impermeability procedure; further, it is shown that both limits commute. Such rigorous limits are in the strong resolvent sense.
Quanto vale um talento? Uma análise antropológica sobre a valorização e circulação dos jogadores de futebol profissional no mercado esportivo
(Universidade Federal de São Carlos, 2009-10-13)
Palmiéri, Júlio César Jatobá
;
Toledo, Luiz Henrique de
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https://lattes.cnpq.br/6711269335520497
Preservação de mínimos locais de famílias de funcionais via gama-convergência e aplicações
(Universidade Federal de São Carlos, 2009-10-14)
Pereira, Jamil Viana
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Nascimento, Arnaldo Simal do
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https://lattes.cnpq.br/6609243657130387
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https://lattes.cnpq.br/1641850650875934
Análise da expressão e do papel da ADAM9 humana na capacidade invasiva de células tumorais por silenciamento gênico
(Universidade Federal de São Carlos, 2009-10-14)
Micocci, Kelli Cristina
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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/5602101431025314
ADAMs is a term used to describe the presence of disintegrin and metalloprotease domains(A Disintegrin And Metalloprotease) in a certain class of multi-functional membrane proteins,expressed in several animal species such as mammals and insects. They play important rolesin many physiological processes as in fertilization, myoblast fusion, migration, proliferationand cell survival, as well in diseases including breast, prostate, and pancreas cancer. ADAM9is involved in cellular processes such as adhesion, migration and signaling of tumor cells andit is involved in the metastatic spreading. Aims: To analyze the expression of ADAM9 intumor cell lines (MDA-MB-231 and DU-145), no tumors (FH and C2C12), and to generateknockout clones for ADAM9 expression using silencing RNA techniques for the study ofADAM9 effects on invasion, proliferation and gene expression of MDA-MB-231 cells.Methods: Cells were cultured and plated (2x106 cells/plate of 6cm) for 24 hours in DMEM(10% FBS) and lysed for western blotting and zymography. To check for inhibition ofadhesion to immobilized collagen I, MDA-MB-231 cells and FH (5x106 cells/ml) werelabeled with CMFDA, and then incubated with anti-ADAM9D and anti-RP3ADAM9 indifferent concentrations. For ADAM9 silencing, it was used a kit (Silencer ® siRNA StarterKit - Ambion), 2x105 cells (MDA-MB-231) and the transfection agent (Lipofectamine 2000 -Invitrogen). The cells were plated in 5ml of culture medium DMEM/plate. On the third daycells were treated with the transfection agent and RNA silencing primers. Total RNA wasisolated for RT-PCR, and proliferation and invasion in matrigel assays. Results: All the celllines studied expressed ADAM9 in the tested conditions. MMP-2 (Gelatinase-A) activity wasdetected in the cell extracts of all studied cell lines. Silencing of ADAM9 did not affect therate of MDA-MB-231 proliferation, at 4, 5, 6, 7, 8, 9 and 10 days after silencing (24 or 48hours of incubation in 96-well plates). Silencing of human ADAM9 inhibited tumor cellinvasion in matrigel (71,51±8,02%) when compared to control. Conclusion: The generation ofMDA-MB-231 knockout clones lacking ADAM9 expression using siRNA technique did notaffect the rate of cell proliferation but inhibited tumor cell matrigel invasion, suggesting thatADAM9 is an important molecule in the processes of invasion and metastasis.
Estabelecimento de meios de cultura para o cultivo de Streptomyces isolados de sedimento marinho
(Universidade Federal de São Carlos, 2009-10-16)
Romano, Luis Henrique
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Sousa, Cristina Paiva de
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https://lattes.cnpq.br/9002619114161319
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https://lattes.cnpq.br/0692713353762468
Microorganisms represent an important source for production of bioactive metabolites for diverse applications. The production of these substances is directly related to the culture medium associated with sources of carbon and nitrogen available. Thus this study aimed to establish an appropriate composition of culture media for growth of Streptomyces carpaticus, Streptomyces acrimycini and Streptomyces cebimarensis. These microorganisms were isolated from marine sediments that were preserved in cryovials stored at-80ºC. The species studied were grown on solid media ISP4, ISP5 and GYM and phenotypically characterized. It was observed that Streptomyces carpaticus developed uniformly in all culture media and presented production of pigment in Gym medium. Microorganisms were also grown in solid media (Gym, A1RDP, ISP4 and ISP5). It was observed that Gym is the best medium to promote the microorganism growth. The strains were grown in different concentrations on osmotic medium Gym and on minimal medium with different sources of carbon and nitrogen in crops with flasks. The three strains were grown in batch bioreactors using conventional Gym medium and it was obtained 4 g / L of cell mass of S. carpaticus and S. acrymicini and 6 g / L of cell mass of S. cebimarensis. It was observed the presence of substances with cytotoxic activity on the breeding grounds. Besides, it was observed that the three species probably present diauxic behavior. S. carpaticus consumed preferentially maltose, while other species used glucose first.
Estudo de efeitos quânticos em redes de junções Josephson SNS e SIS com composição Nb-CuxAlyOz-Nb através da indução de vórtices por conseqüência do tamanho de rede
(Universidade Federal de São Carlos, 2009-10-16)
Rivera, Victor Anthony Garcia
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Moreira, Fernando Manuel Araújo
;
https://lattes.cnpq.br/1809254923092721
;
https://lattes.cnpq.br/4335695906660499
In this thesis we studied the quantum effects in networks of Josephson junctions under the induction of vortices and as a consequence of the size of the sample itself. For this, it also was carried out all the instrumentation required to achieve that goal. The superconducting devices known as Josephson junctions offer the opportunity to study a wide variety of concepts of basic physics, especially when they are in the form of twodimensional arrays called networks. In particular, these structures allow us to study quantum phenomena such as tunneling Josephson dc / ac, proximity effect, Coulomb blockade, quantum fluctuations and others like phase transition of Berezinsky-Kosterlitz-Thouless (BKT), all present in these devices. In particular, in this thesis we study two-dimensional networks of Josephson junctions of types SNS (superconductor-normal-superconductor) and SIS (superconductor-insulatorsuperconductor) with composition Nb -CuxAlyOz-Nb. The study of these samples was performed by obtaining the characteristic curves V × I with and without applied magnetic field. The analysis of these curves was performed by the law of power scale: ��for the SNS network, and ��/�� for the SIS networks. The fact th��at ��t��w��o types of formulas adjustment is due to the asymptotic behavior present in these samples. Moreover, the temperature of the BKT transition was determined for ��3. The analysis of the experimental obtained results clearly shows the dependence of quantum effects on the size of the samples studied.
A catequese colonial jesuítica na região do Itatim no século XVII
(Universidade Federal de São Carlos, 2009-10-16)
Sousa, Neimar Machado de
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Ferreira Junior, Amarilio
;
https://lattes.cnpq.br/0748545841167046
;
https://lattes.cnpq.br/2521988816697732
Esta pesquisa es un estudio de las relaciones, contexto e influencias pedagógicas construidas desde el contacto de los misioneros y maestros jesuitas con los Itatín, durante el siglo XVII, en la Provincia de Itatín. Su objetivo es investigar los principios fundamentales de la educación jesuítica colonial entre los Itatín, relacionando catequesis, conversión y la ocupación española del territorio indígena que implicó en el establecimiento de negociación, establecidos desde el contacto indígena con los misioneros jesuitas, colonos, encomenderos españoles y esclavistas luso paulistas. El estudio está basado en los manuscritos de la Colección de Angelis, analizados desde la perspectiva étnica histórica, una especialización en la frontera de los estudios de historia social y económica aplicados a la Historia de la Educación. Los estudios de las relaciones sociales establecidas en el ámbito de la escuela en esta región abordan tradicionalmente el período reciente siendo pocos los análisis sobre el gran período jesuítico y colonial. Estos estudios enfatizan la comparación entre los colegios que se establecieron en el litoral luso-brasileño y tierras interiores de América española cuya tendencia es englobar las misiones de Itatín entre las reducciones de Paraguay sin enfatizar la participación de los indígenas en la construcción, negociación o negación de los proyectos coloniales, entre ellos el escolar. Además, no tratan el papel de la escuela en la destrucción de las identidades indígenas. Uno de los resultados alcanzados, relacionados más específicamente al oficio de la historia, es el cuidado metodológico en el trato con la actuación y las orientaciones pedagógicas de la Compañía, pues estas relaciones se produjeron en el tiempo cronológico colonial. El objetivo primero de estas reducciones fue cristianizar los rasgos indígenas que no pudiesen ser sustituidos, apagados o destruidos. Para cristianizar o civilizar, fue necesario un esfuerzo interpretativo para probar, basado en la tradición, la aptitud de los indígenas para aprender, o sea, la mayor interrogación fue: ¿Estos hombres son hombres, portadores del logos y con derecho al uso pleno de la palabra? A los colonizadores y conquistadores, parecía que solamente una parcialidad de la humanidad tenía esta capacidad y derecho, o sea, los colonizadores. La educación jesuítica en Itatín, colonial y occidental, fue un instrumento de alcance limitado, pero apropiado, a la medida de lo posible, por los Itatín para tener accesibilidad y tránsito por el mundo Blanco.
Caracterização e análise do patrimônio arbóreo da malha viária urbana central do município de São Carlos-SP
(Universidade Federal de São Carlos, 2009-10-22)
Sucomine, Nivia Maria
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Sales, Almir
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https://lattes.cnpq.br/7377787166073311
;
https://lattes.cnpq.br/9848798472640309
The road afforestation from the central urban area of São Carlos-SP was studied in order to know it and diagnose it in order to provide support for its maintenance and expansion. To this end, we performed a qualitative and quantitative assessment of tree cover, all its information and analysis developed and entered into a computerized database. We have found 103 different plant species in a total of 2626 individuals, 147 killed, 502 seedlings and 1977 adults. Schinus molle and Murraya paniculata were the most abundant species. For the diversity index and the average index of trees per kilometer of street obtained the values 3.18 and 26.73 respectively. The average diameter at breast height (DBH) was 21.4 cm; 55% of plants had height less than 5.40 m; 45% of the population is compound of native species and only 26 species are fructiferous. Small was the number of affected plants or plant injury, but more significant was the damage caused by the crown pruning irregular. 899 individuals were in conflict with one or more equipment around and 76% had little or no free space pavement. The results obtained it was concluded that this area has a high diversity floristic. In quantitative terms, this population was still very poor, but the overall situation of trees was satisfactory. It is recommended that an intensive program of planting of trees (with less abundant species) in the streets with the lowest level of individuals and another program for the maintenance and conservation of the stock already in place, pruning and expansion of free spaces on the sidewalks.
Jogos educativos sobre sustentabilidade na educação ambiental crítica
(Universidade Federal de São Carlos, 2009-10-23)
Rosa, Antonio Vitor
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Oliveira, Haydée Torres de
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https://lattes.cnpq.br/5458113597909705
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https://lattes.cnpq.br/9850367938243375
This study, which falls within the category of exploratory research, had the following aims: a) to identify the main elements of the educational approach of socio-environmental sustainability according to the Critical Environmental Education perspective; b) to review the state of the art of educational games related to Environmental Education; c) to identify the limits and possibilities for the design and use of educational games that approach the theme of sustainability in the Critical Environmental Education perspective. A set of stages and procedures were developed based on the multi-referentiality methodology, the main ones being: a) demarcation and contextualization of the terms Critical Environmental Education , games , and sustainability ; b) survey and discussion of researches that focus on educational games; c) survey of the main aspects considered important in educational processes dealing with sustainability; d) survey and characterization of the actual games designed for Environmental Education; e) survey and analysis of table games (educational or not) and identification of their mechanics and other features; f) formulation of four proposals for educational games; g) carrying out of pretest workshops for the games created; h) reflections linking the experiences of both the proposals and pretests with the theoretical references on educational games and Critical Environmental Education. It was possible to verify that the use of games has a great educational potential and offer several possible perspectives, themes, plots, types, and mechanisms. Furthermore, the fact that games can provide a parallel world, without limits for creativity and experience, converges to the purpose of discussing the development of sustainable societies. However, practically none of those aspects is explored by most of the existing games related to Environmental Education, which have a poor level of education contribution, lack critical references, and usually provide few opportunities for a significant socio-environmental learning experience. The surveys that were carried out indicate that there is little production and use of games in Environmental Education. One of the main difficulties for developing such games, especially the simulation ones, is the incompatibility between the enormous complexity of the concept of sustainability and the need for making choices and formulating models with extreme simplifications, which is in opposition to the goals of Critical Environmental Education. It was noted that it is very difficult to conciliate educational goals with playability while designing games that approach complex themes.
Estudo das micropropriedades de resíduos sólidos gerados nos decantadores de estações de tratamento de água
(Universidade Federal de São Carlos, 2009-10-27)
Jacomassi, Fabio Evandro
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Cordeiro, João Sergio
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https://lattes.cnpq.br/2572864522562875
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https://lattes.cnpq.br/5507488363554508
The conventional or life-cycle system for water treatment (chemical coagulation, flocculation, sedimentation, filtration, disinfection, fluoridation and pH correction) employed in most water treatment plants (WTP) in Brazil turns water unfit for human consumption (spring water and surface water) into a product that is in accordance with the drinking water guidelines for distribution to the population. In this system, the waste generated in the decanters by the addition of chemical coagulants has been termed WTP sludge . This material consists of solid phase and liquid phase (this latter divided into distinct fractions), and free water may represent a considerable portion of it, depending on the cleaning of the sedimentation tanks. The natural removal of free water from WTPs can be performed by natural systems to reduce volume, in which task the drainage beds play a key role. This work studied the microcomponents of solid waste generated in the WTP decanters of 03 cities in the state of Sao Paulo which use distinct types of chemical coagulants. The samples passed through a drying process and subsequent laboratory analysis. In light of the results, suitable strategies for either disposal or reuse of the waste were considered. It was concluded that sludge from sources 1 and 3 have potential for reuse in ceramics, because they have high contents of Al and Si. On the other hand, sludge 2 may be used in red ceramics (due to the high percentage of Iron).
Uma infra-estrutura computacional para o gerenciamento de programas de ensino individualizados
(Universidade Federal de São Carlos, 2009-10-27)
Orlando, Alex Fernando
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Teixeira, Cesar Augusto Camillo
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https://lattes.cnpq.br/1123376648713853
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https://lattes.cnpq.br/6460890766229353
Difficulties in learning how to read and write might bring serious jeopardy to students progression in school. Researches focusing teaching methods for individualized application, based on the paradigm of stimulus equivalence, show that it is possible to significantly improve learning of reading and other skills Although they present good results, these methods have limited range, because the presence of a tutor is not always possible or economically viable. Besides, authoring and management of learning programs based on these methods are complex and demand training of tutors and specialists. Some results have already been reached concerning to informatization, though the solutions presented offer little flexibility, since they focus on teaching topics that are either too specific or too broad, which requires complementary effort for its effective usage. This dissertation explores and evaluates software engineering and distributed computing techniques in an attempt to find a solution that might diminish costs involved in the creation, application and management of individualized programs, besides allowing large scale diffusion of teaching through these methods. A software infrastructure that allows these objectives is proposed, composed by an architecture, modules to perform specific tasks, and recommendations on some patterns of architecture, project and interface in order to help the development or adaptation of new modules. In order to maximize the installed base of the developed modules and also to benefit a larger number of students, the solution promotes interoperability of Web applications, mobile devices and interactive digital television. Aiming the validation of the proposed infrastructure and also to offer an operational codification to the problem of computerized individualized learning, a modular system named GEIC was developed and deployed, being used by researchers of several universities. Despite the initial motivation of this work to offer an infrastructure for the creation of systems specific for teaching reading and writing, the solution proposed here is very broad in scope and supports other domains and learning paradigms.
Educação ambiental não-formal : a práxis coletiva dos pescadores artesanais no rio Paraguai Cáceres/Mato Grosso/Brasil
(Universidade Federal de São Carlos, 2009-10-28)
Bezerra, Darci Ordonio dos Santos
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Oliveira, Haydée Torres de
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https://lattes.cnpq.br/5458113597909705
;
https://lattes.cnpq.br/3723687814703034
Cáceres is situated to the left edge of High Paraguai river, in the Region Center-West, Brazil, possessing co-ordinated: south latitude (16º 11' 42' ') e longitude west (57º 40' 51' ') with altitude of 118 meters above sea level. This research was carried through with the objective to know the perception of the professional fishing of the Z-2 Colony with regard to the ambient functions, potentialities and to the impacts of the Paraguay river throughout the urban perimeter of the city of Cáceres/MT, in order to become possible the participation of all the involved ones in activities of Environmental Education, aiming at the environment conservation and the improvement of quality of life in the daily one of these people. Fishing has great importance for the Cáceres population, therefore it is the economic base for many families of low income who use waters of High Paraguai river, vestibule of the Pantanal Weed. The used methodological procedures for the collection of data had been documentary analysis, participant comment, informal dialogues, interviews, works of field, application of questionnaires, accomplishment of workshops, dynamic of group, lectures, systematization and interpretation of data. As results, we concluded that the professional fishing have faced a series of problems generated for fish predatory, for the deforestation and the tourism not guided, inconsequence practical that come causing difficulties in the supply fishing boat (amount) and in the biodiversity of ictiofauna (species) throughout the time, beyond social environmental impacts in the Paraguai river, as exclusion of the professionals of fishes, sanding up and erosion of the edges. Many of them point the polluting activities and predatory, they are conscientious that they can help the environment agencies and present suggestions for the questions of professional and sportive´s fishes. From the identification of the collective problems that face and the interpretation of the perception that they possess on such questions, it was possible to carry through practical of Environmental Education, taking in consideration the open and critical dialogue. It was evidenced that the environment management of Cáceres applied to the Paraguai river is not adjusted, lacking a rigorous fiscalization for it fishes predatory and bigger opening for the participation of the professional fishing in the public administration.
Contribuições ao estudo da fluidodinâmica e da secagem de pastas em leitos fluidizado e vibrofluidizado
(Universidade Federal de São Carlos, 2009-10-30)
Meili, Lucas
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Freire, José Teixeira
;
https://lattes.cnpq.br/2270677706718167
;
https://lattes.cnpq.br/3802018064427795
The aim of this study was to analyze the fluid dynamic of the fluidized and vibrofluidized beds with particles with diameter under 1.00 mm, and also to analyze the fluid dynamic behavior of wet beds and the drying of different liquids and suspensions during the transient drying period. The purpose of these tests is to obtain relevant information about the influence of vibration and also to investigate some issues related to the dimensionless vibration number (Γ), which has been used and understood in a controversial way by the scientific community. The fluid dynamic and drying experiments were conducted in a fluidized/vibrofluidizad column with diameter equal 0.014 m and high 0.50 m. The analysis of fluid dynamic was performed with particles of 463 and 780 μm, under different vibrational conditions. Drying and wet fluid dynamic experiments were carried out with particles of 2.19 mm, with the following liquids and pastes: distilled water, sewage sludge, skim milk and calcium carbonate solutions with solid concentration of 3%, 6% and 9%.. Drying essays were conducted at different paste feed rates and under air velocity equal to1.33 and 1.55 m / s, and temperatures of 80 and 100 ° C. Two vibration conditions yielding a constant vibration number (Г = 4.0) were tested: one with A = 0.003 m and f = 18.20 Hz and other with A = 0.015 m and f = 8.14 Hz. In fluid dynamic tests with particles of dp< 1.00 mm, the characteristic curves were obtained from the classical methodology were analyzed aiming at identifying the influence of the particle size and vibrational on the pressure drop and minimum fludization velocities. For the wet beds was evaluated the dynamic behavior of dimensionless pressure drop and dimensionless air inlet velocity, while in drying experimens the behavior of air relative humidity, absolute humidity, powder production rate, powder moisture content and energy efficiency was assessed. The results obtained show that the use of vibration together with fluidized air may result in significant improvement of the bed dynamics, thus enhancing the drying conditions. They evidenced also that the use of different combinations of frequency and amplitude values to yield a same vibration number may result in very different dynamic behavior in vibrofluidized beds. As a consequence, variables associated to drying such as air relative and absolute humidity, powder production rate and energy efficiency were affected by vibration conditions. To fully characterize the vibration conditions, the value of Г should be informed together with either the amplitude or frequency of vibration.
Desenvolvimento profissional de formadores em exercício: contribuições de um programa online
(Universidade Federal de São Carlos, 2009-10-30)
Rinaldi, Renata Portela
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Reali, Aline Maria de Medeiros Rodrigues
This research tries to understand the contributions of an online continuous formation Program, aiming at the professional development of formers working with basic education, supported by the theoretic-methodological reference of professional practice epistemology and distance education. Thematics such as teachers formation and distance education were examined, more specifically the online education , for considering the distance education strategy, linked to information and communication technologies (ICT), a way to conceive new opportunities for the professional development, viewing school as the formation process center references were form Shulman, 1986, 1987; Pérez Gómez, 1989; Zeichner, 1993, 2008; Knowles and Cole, 1995; Tardif, 2000, 2002; Prado and Valente, 2002; Almeida, 2003, 2005; Mizukami et al, 2003; Moran, 2003; Vaillant, 2003; Schlemmer, 2005; Vaillant and Marcelo, 2006; Hunt, 2008. The methodology used was based on the constructive collaborative pattern of research-intervention, [Cole and Knowles, 1993; Mizukami et al, 2003] linked to qualitative research theoretical matrix [Bogdan and Bicklen, 1994; Lüdke and André, 1986]. The intervention research was characterized by an online professional development Program, in the digital learning environment of the UFSCar Teachers Portal, with the participation of sixteen formers working with basic education and two researches acting as the Program mediators. The analyses were draw out from the formers reports in varied activities, such as debates occurred throughout the formative processes, private messages (mail) and testimonies that produced the formers reflexive memorial at the end of the Program. The results try to clear up aspects related to the work configuration during time spent in the learning digital situation, indicating different moments by which formers passed by in this professional development process and through the building-up of confidence relation ships, when doubts, anguishes, fears, certitudes and convictions that orientate their practices start to be explicit collectively, offering the opportunity of thinking in and about the practice from a sharing glance, allowing then the no-knowing explicit and the possibility of negotiating and explicit senses to become a former in basic education. Such dynamics happened because of the researchers continuous presence, which helped to approximate formers and to create affective bonds, which assume in the digital context a more complex dimension, related to subjective questions, due to thought expression and communication based on writing. Besides, results showed traces of how the formers knowledge changed during the process, from the concepts they have about their profession and the meaning of being a former, and relationships set up with the school partners, the theoretical discussions about how to teach teachers to teach, the possibilities of keeping on learning despite the adversities of their profession and the function/charge they occupy. Therein, it is possible to understand this researchintervention as an investigation that passes through the formation universe of online education and professional practice, that bring together results that amplify the debate about how elaborate continued formation processes in apprenticeship digital contexts, having the school as its center. In placing the basic education formers as the focus of the study, this research also came across results that enlarge the rare existing reflections about teachers formers, mainly because are being focused the basic education professionals, which also offer outpoints for debates and new researches interested in increasing knowledge in this promising investigative front.
Geração genética de classificador fuzzy intervalar do tipo-2
(Universidade Federal de São Carlos, 2009-10-30)
Pimenta, Adinovam Henriques de Macedo
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Camargo, Heloisa de Arruda
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https://lattes.cnpq.br/0487231065057783
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https://lattes.cnpq.br/8400272358305102
The objective of this work is to study, expand and evaluate the use of interval type-2 fuzzy sets in the knowledge representation for fuzzy inference systems, specifically for fuzzy classifiers, as well as its automatic generation form data sets, by means of genetic algorithms. This work investigates the use of such sets focussing the issue of balance between the cost addition in representation and the gains in interpretability and accuracy, both deriving from the representation and processing complexity of interval type-2 fuzzy sets. With this intent, an evolutionary model composed of three stages was proposed and implemented. In the first stage the rule base is generated, in the second stage the data base is optimized and finally, the number of rules of the rule base obtained is optimized in the third stage. The model developed was evaluated using several benchmark data sets and the results obtained were compared with two other fuzzy classifiers, being one of them generated by the same model using type-1 fuzzy sets and the other one generated by the Wang&Mendel method. Statistical methods usually applied for comparisons in similar contexts demonstrated a significant improvement in the classification rates of the intervalar type-2 fuzzy set classifier generated by the proposed model, with relation to the other methods.
Estudos do crescimento anódico de óxidos e da deposição de apatitas sobre a liga biocompatível Ti-13Nb-13Zr
(Universidade Federal de São Carlos, 2009-10-30)
Tossato, Laís Tereza Duarte
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Biaggio, Sonia Regina
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https://lattes.cnpq.br/0418215244233120
Studies on the anodic growth of oxide films passivating the biocompatible alloy Ti-13Nb-13Zr (m/m) and the formation of hydroxyapatite (HA) films on these oxides were carried out in this work. The oxides were grown either potentiodynamically up to 8 V (vs. SCE) or by micro-arc oxidation (MAO) in phosphate buffer electrolyte of pH 5 at room temperature, in order to obtain both compact thin films and porous thick films, respectively. The bioactive films of HA were formed by electrochemical deposition using catodic current density, in solutions containing salts of Ca and P, and by biomimetic method in solutions simulating physiological fluid. The metal/oxide and metal/oxide/HA electrodes were submitted to stability tests as a function of the immersion time in an electrolyte simulating the physiological medium as the PBS solution. The electrochemical parameters of the anodic oxides, with and without the HA films, were analysed by means of electrochemical impedance spectroscopy (EIS) at constant time intervals during the immersion in PBS solution. Analyses of scanning electron microscopy (SEM), dispersive energy X-ray spectroscopy (EDS) and X-ray difractometry were also performed for all electrodes for morphological, compositional and structural characterization of the oxide films/HA before and after the immersion time in PBS solution. The results also revealed that the oxides formed by MAO is the more corrosion resistant in a chloride-containing medium, the HA coating obtained by electrodeposition presents higher corrosion resistance when formed on the compact oxide, and the oxide obtained by MAO presents higher corrosion resistance when the apatite coating is obtained by the biomimetic method.
Estudo eco-hidrológico da bacia hidrográfica Mariana, afluente do Rio Taxidermista, Alta Floresta - MT
(Universidade Federal de São Carlos, 2009-11-05)
Umetsu, Ricardo Keichi
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Matos, Dalva Maria da Silva
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https://lattes.cnpq.br/4728734263109138
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https://lattes.cnpq.br/2602242541769497
This study aimed to describe the hydro-ecological aspects of Mariana Hydrographic Basin, tributary of the river Taxidermista, Alta Floresta, MT, Brazil. Therefore, studies were performed on the morphometry of the basin; land use; floristic, vegetation structure and correlation with the distribution of tree species and soils of the riparian forest; dynamics of runoff; water physical-chemical aspects; and socio-economy aspects. These results indicate the strong structural drainage control of basin, however the current land use, dominated by cattle farm and deforestation, contribute to erosion. Furthermore, the riparian vegetation is in secondary successional stage probably due to preterit human disturbance. Soil and tree species correlation showed soil texture as attribute greater importance in the distribution of plant groups. The dynamics of runoff showed a low capacity of water storage basin. The water physical-chemical aspects results were directly related to the land use, and the parameters Color, Turbidity and Total Phosphorus presented themselves as the most suitable for monitoring water quality and environmental degradation. The basin is occupied by colonos from the process of private colonization occurred in the mid 1970 s and is predominated by small farms, many over-used, the average monthly income is directly related to its size. The failure of agriculture established at the time of colonization conditioned the uncontrolled deforestation for pasture and, since then, extensive cattle farming is predominant. Thus, the current land use, and the settlement historical processes of the region caused important environmental changes that are directly related to basin s sustainability, especially those related to water shortage. Therefore, it is necessary to implement recuperation and restructuring degraded areas program and the strengthening of family agriculture, aiming to economic and environmental sustainability.
Italianos em formação. (São Carlos, 1882-1914)
(Universidade Federal de São Carlos, 2009-11-09)
Mazutti, Silvia Maria
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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/9891202671157305
This work aimed to study the way the Italians interacted among themselves and between the various ethnic groups that inhabited the city of São Carlos between the ages 1882 to 1914. For this, criminal proceedings were used and those involving immigrants from regions: southern, central and northern Italy in conflict situations. Through analysis of criminal cases is noted as was the daily life of these immigrants, the interaction between them and the relations of conflict between the various ethnic groups also lived in the municipality of Sao Carlos. This study aimed to examine how the relations were between this Italians one another and how their differences were dissipated over the years, thus forming an identity: the Italian identity. And how this Italians integrated into the society of Sao Carlos over the years.