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Indicadores de projeto para edifícios em alvenaria estrutural
(Universidade Federal de São Carlos, 2007-07-24)
Freire, Ailton Soares
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Parsekian, Guilherme Aris
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https://lattes.cnpq.br/7798651726059215
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https://lattes.cnpq.br/3488579198139755
This work deals on the identification and quantification of pointers of project of buildings in structural masonry. Several projects of different types are analyzed from which each material is quantified relative to the characteristics of each construction. Project pointers were then assessed. The calculated pointers can propitiate the identification of factors of the construction and criteria of project that contribute for the rise or the reduction in the consumption of materials. The pointers can represent important tool for the designer engineer, as they can serve as reference values for gauging projects in development. Additionally, the consumption pointers also are important for the planning and budget of new enterprises. It is believed that several aspects of this research had been very few referenced before, such as the case of consume rate of steel and concrete in transition structures, the consume of different block types in relation to the floor area, the average floor load, the steel rate in structural masonry, among others
A fibra de vidro em matrizes poliméricas e cimentícias e seu uso estrutural em construção civil : o estado-da-arte
(Universidade Federal de São Carlos, 2007-07-25)
Ortenzi Junior, Altibano
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Parsekian, Guilherme Aris
;
https://lattes.cnpq.br/7798651726059215
;
https://lattes.cnpq.br/2313825362934634
This dissertation deals with the use of fiberglass as a concrete addition, in order to improve its mechanical properties such as better crack distribution, or as polymer reinforcement, in order to form a composite to be externally or internally used as reinforcement to other material as concrete or masonry or to use itself as a structural member. The literature review presented is believed to achieve the current state-of-art of the fiberglass use in civil construction applications. Next, usual approaches to dimensioning structural members in GFRP are presented. Construction systems and processes using this material are assessed focused to civil construction. Themes as the technology spread up, Brazilian applications and eventual difficulties are focused. With this research one expects to approach the text to the state-of-art up today.
Consultoria & cooperativismo : cooperativa de consultores e espaço de consultoria brasileiro.
(Universidade Federal de São Carlos, 2007-07-26)
Ralio, Vanise Rafaela Zivieri
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Donadone, Julio César
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https://lattes.cnpq.br/7643906508178259
Materials in general as well as specialized articles with a lot of semiofficial estimation have indicated high increase in the use of management consultancy particularly during the post-war period of the sixties decade. Numerous authors have linked this increase to the growth in markets and technology complexities. However, in addition to consultancy firms, it has also appeared in the economic arena, consultants cooperatives of business enterprises as a new working arrangement occupying nearly the same space available in large and medium-sized firms. As a result, an interest in developing this study has surged as basis for bibliographical research based upon documentation as well as interviews with some members of such cooperatives aiming at analyzing a better understanding of what has motivated the appearance and development of such consultants cooperatives as well as the understanding of such cooperatives importance on the present economic arena. A certain cooperative located in the city of Belo Horizonte at Minas Gerais was the subject of such study. This cooperative set up its activities in 1994 and, today, comprises more than 1200 members. Its foundation, present situation as well as its internal relationship, claim of contacts, and increase are some of the factors looked into this study.
Método participativo para desenvolvimento de indicadores de desempenho operacionais
(Universidade Federal de São Carlos, 2007-07-26)
Lopes, Mariza Terezinha Rosolen
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Camarotto, João Alberto
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https://lattes.cnpq.br/1427853773681255
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https://lattes.cnpq.br/5526460264181828
Utilização de planejamento fatorial no estudo da remoção eletroquímica de íons Pb(II) de fluentes simulados
(Universidade Federal de São Carlos, 2007-07-27)
Almeida, Lucio César de
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Bocchi, Nerilso
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https://lattes.cnpq.br/5930614700886481
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https://lattes.cnpq.br/6233656045399753
In this work, the removal of Pb(II) ions from simulated wastewaters, using a flow-through cell under galvanostatic condition was studied. With help of factorial design and response surface methodology, the variables current, electrolyte flow rate and the specific surface area of the three-dimensional cathode used (stainless-steel wool AISI 304) were simultaneously investigated in order to optimize the electrochemical system. Firstly, the specific surface area of the stainless-steel wool used as three-dimensional cathode was estimated. Then, factorial designs were employed on the study of the removal of Pb(II) ions for different values of cathodic current, electrolyte flow rate and mass of the stainless-steel wool (consequently, distinct specific surface areas). Finally, the response surface methodology for optimization of the removal process and the analysis of variance (ANOVA) for evaluation of the quality of the developed fitting models were employed. Higher values of removal efficiency (RE) were obtained for the highest values of cathodic current; RE values above 90% were obtained after 30 min electrolysis. Higher values of current efficiency (CE) (22%) were obtained for intermediate values of current (~ 0.24 A). For values of current in the range of 0.24 to 0.31 A, the CE values were lower, due to occurrence of simultaneous reactions such as reduction of oxygen, water and nitrate. Low CE values were also obtained for current values in the range of 014 A to 0.24 A as not all surface area of the steel wool was operating under mass transport control. The response surfaces developed for RE and CE values as a function of the current and flow rate revealed that the region close to 0.25 A and 250 L h-1 was the best for the removal of Pb(II) ions. In these conditions, the RE and CE values were 93 % and 22 %, respectively. Although the concentration of Pb(II) decreased from 54 mg L-1 to 0.39 mg L-1 after 90 min electrolysis, almost 99 % of removal of Pb(II) ions was achieved after only 40 min electrolysis. A mass-transfer coefficient (km) of 1.8 x 10-5 m s-1 was obtained for the electrochemical reactor.
Estudo de painéis de alvenaria estrutural sujeitos a ações perpendiculares ao plano
(Universidade Federal de São Carlos, 2007-07-27)
Maluf, Danilo Rodrigues
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Parsekian, Guilherme Aris
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https://lattes.cnpq.br/7798651726059215
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https://lattes.cnpq.br/3770989340770862
There are several cases of out-of-plane loaded masonry such as earth retaining walls, water reservoir, wind loaded panels and other. Thus, there is a lack of Brazilian technical literature in this topic. The aim of this thesis is to fulfill this lack and to be as a reference text to design such structures. The litterature review covers recommendations from several international references. The compiled analysis of those text tries to bring these to the Brazilian materials and technical approach. Several plastic methods to analyze masonry panels are presented and results from using these method to assess the required reinforcement are compared. A comparative analyses taking into account the Limit State and Allowable Stress design methods, considerind requirements from different intenational codes as MSJC 2005, ENV 1996 1 Eurocode 6 - Part 1-1 e 1-2, preliminary review version of NBR 10837/Sep.2005, BS 5628 1/1992; BS 5628 2/1995; BS 5628 5/1992), SAA AS 3700/1998 and CSA S304. 1/1994, are presented. As a closure a complete design example of a masonry panel case, a warehouse panel designed to resist lateral wind forces, is presented.
Titulações potenciométricas de cátions metálicos tendo como eletrodo indicador o sistema Cu/CuY2-
(Universidade Federal de São Carlos, 2007-07-27)
Silva, Paulo Henrique Pereira da
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Faria, Ronaldo Censi
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https://lattes.cnpq.br/8659496864305621
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https://lattes.cnpq.br/9876088563651080
In this work a Cu/CuY2- indicator system was used to carry out potentiometric titrations of Cu2+, Co2+, Cd2+, Zn2+ and Mn2+ ions with EDTA solution. A copper wire with 8.32 cm2 of superficial area was used as an indicator electrode. The CuY2- complex was synthesized by reaction between cupric oxide (CuO) and EDTA standard solution (H2Y2-) at a temperature of 85 oC. The titrations were performed in the presence of small concentration of the CuY2- complex. The Cu2+, Co2+, Cd2+ and Zn2+ ions were titrated in sodium acetate buffer solution (pH 4.80) and Mn2+ in TRIS-HCl buffer solution (pH 8.90). A modification in a conventional method for titration of metallic cations with EDTA solutions was performed to improve the response of the system. The modification includes addition of buffer species to the titrant solution. The buffer specie used to prepare solutions was sodium acetate. The influence of the concentration of CuY2- added in the titration performance was investigated and a relation of nM2+/nCuY2- equal or greater than 5 should be used for a better response. During this work other studies were performed, such as the method to obtain carbonate-free sodium and potassium hydroxides solutions as well as the method for the standardization of EDTA solid reagent, Na2H2Y, to employing as secondary standard in the directly preparation of EDTA solution.
Desenvolvimento de procedimento automático para determinação fotométrica de N-ureídos totais em leguminosas empregando multicomutação em fluxo
(Universidade Federal de São Carlos, 2007-07-28)
Kamogawa, Carla Cripa Crispino
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Reis, Boaventura Freire dos
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https://lattes.cnpq.br/7619359855870896
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https://lattes.cnpq.br/1513389610225734
This work aimend the development of an automated procedure for photometric determination of total ureide in soybean tissues using multicommutation in flow analysis. The photometric detection was based on the formation of indophenol blue (the Berthelot reaction), which involving oxidation of the amide nitrogen (N-ureide) by hypochlorite and reaction with phenol in alkaline medium. The manifold hardware and the instrument for photometric detection using a LED as radiation source and a photodiode as detector were developed. The system was microcomputer by a software written in QuickBasic 4.5. In the optimization of the proposed procedure the following parameters were considered: the hypochlorite concentration and its alkalinity, the phenol concentration and its alkalinity, the reaction temperature, the sample residence time, the volume of the phenol solution and the removal of interferences by ion exchange resin column. After optimization, the analytical curve was linear in the 30 to 260 μmol L-1 concentration range with a limit of detection of 1 μmol L-1, a relative standard deviation lower than 3%, consumption of 6.7 mg phenol per determination and sample throughput of 22 determinations per hour. The developed procedure was used for N-ureide determination in soybean leaves extracts. With results was agreement with the reference method at the 95% confidence level. The developed procedure is suitable for routine analysis in laboratories conducting research in Soil Microbiology and Biological Nitrogen Fixation with advantages in relation to precision, operational costs and waste generation.
Análise do isomorfismo na constituição do arranjo organizacional "Coordenação de Curso": estudo de caso em duas Instituições de Ensino Superior no Estado de São Paulo
(Universidade Federal de São Carlos, 2007-07-30)
Mariano, Karina Araújo
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Côrtes, Mauro Rocha
Since a long time that the Superior Education Institutions (SEI) don t care only about teaching. Especially when it refers to public universities, it gets even more difficult to characterize in just one word what is the institution concern about. The creation of an organized arrangement that works only on the graduations courses, in the studded cases, is an alternative to guarantee the specifications and a satisfactory functioning of the teaching even in the presence of others products that compete inside the university institution. Finding the organized structure form that satisfactory attempt to the needs of the courses in an institutional environment is a substantial aspect of this work. This study applies to analyze the organized arrangement of the Courses Coordination and Courses Coordination Commission of two publics SEI in the State of São Paulo: Federal University of São Carlos and University of São Paulo, campus São Carlos. We attempt to identify similar proceeds or/and different about the organization that it has at least in theory the same priority objective: administrating graduations courses.
Estratégia de produção no setor de serviços: um estudo de caso na Empresa Brasileira de Correios e Telégrafos
(Universidade Federal de São Carlos, 2007-07-30)
Cruz, Daniella Cipola
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Alves Filho, Alceu Gomes
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https://lattes.cnpq.br/7885557554922569
The service industry is continuously growing, reaching positions of higher prominence in the world and Brazilian economies. Its position is relevant in the composition of worldwide GDP. Over the last few years, the contribution of the service sector in the Brazilian Gross Domestic Product has been holding around 60%. The case study on Empresa Brasileira de Correios e Telégrafos (ECT) was addressed to examine the impact of automation of parcels processing on the competitive objectives in a regional business unit and, thus, observe how automation contributed to improve achievement of the whole entity competitive objectives. The technological modernization and the introduction of mechanization in the operational processes provided relevant impacts on different areas to maintain competitiveness. The combination of technological modernization with mechanization of operational process required investments of significant value, however, with fundamental importance in accelerate parcels processing, rationalization of distribution logistics and the final delivery of parcels. Considering such implications, it is plausible to say that strong impact occurred on various decision areas, structural and infra-structural, involving decisions on capacity, facilities and technology which brought relevant changes in the planning and control and human resources systems. The evaluation of visits, interviews, operational performance indicators and costumer requirement/organization performance profiles, determined by the application of the Platts-Gregory methodology for strategy formulation, allowed to verify that the parcel processing automation in business units strategically located in regions of high volume of parcels showed improvement on operational area and provided viability to maintain and, in some costumer segments, to achieve higher market competitiveness.
Estudo do mecanismo de eletrodeposição de cobalto sobre Pt em sulfato na presença de ácido bórico
(Universidade Federal de São Carlos, 2007-07-30)
Santos, Janaina Soares
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Souza, Ernesto Chaves Pereira de
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https://lattes.cnpq.br/1505400360366643
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https://lattes.cnpq.br/5802009429183443
In this work, the cobalt deposition and dissolution processes were studied. The experiments were performed in sulphate solutions at pH values (ranging from 4.9 to 5.5) and in the presence of boric acid. The mechanism of Co electrodeposition was investigated using cyclic voltammetry and current time transients coupled with Electrochemical Quartz Crystal Microbalance (EQCM) technique. Effects of temperature, potential deposition and boric acid and Co2+ concentrations were studied. The boric acid was used as buffer to prevent any pH changes due to hydrogen evolution reaction (HER) during the electrochemical measurements. However, in some special cases, the results show that Co(OH)2 was formed simultaneously with metallic Co on the electrode surface at 48oC. On the other hand, when the bath temperature was 25oC, only metallic Co was detected. Considering the results above, some hypothesis were presented for explaining the ineffectiveness of boric acid. First, the kinetics of boric acid dissociation of was very slow, so does not provide a significant buffering during H2 evolution in high temperature, in which HER is intense. Another hypothesis refers to neutral H3BO3 molecules adsorption on the electrode surface which decreases the active surface for proton discharge. At 48oC, the desorption rate is higher than at 25oC, so the active surface for proton discharge will increase in high temperatures. As result, the pH value can be rise and consequently Co(OH)2 will formed. In these cases, the process efficiency dropped down. The analysis of factorial design shows that the temperature and the Co2+ concentration were the most important parameters for the mechanism change in the Co electrodeposition.
Uso de LALLS in-line na extrusão de sistemas poliméricos bifásicos
(Universidade Federal de São Carlos, 2007-07-30)
Costa, Lidiane Cristina
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Canevarolo Júnior, Sebastião Vicente
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https://lattes.cnpq.br/4153664441338178
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https://lattes.cnpq.br/8246109223926480
In-line analysis equipments play an important hole in the study of polymer blends extrusion for supplying dynamic information concerning to the morphology of the dispersed phases, such as aspect ratio and size distribution of particles. Among them, the device whose operation is based on light scattering stand out for the versatility, fast data acquisition and for its non destructive operation. Since the morphologic characteristics of the polymer blends affects directly the properties of the material, we presented in this work an improvement of an optical detector based on low angle laser light scattering (LALLS), showing that this equipment is effective in the morphologic characterization of the dispersed phase in diluted polymer dispersions. The studied systems were composed by PS, PA6, Al2O3 and TiO2 embedded in PP matrix. During the extrusion several concentrations of dispersed phase were used in transient state. The LALLS prototype detector developed is effective in the characterization of polymer dispersed phases, based in their light scattering, as well as for ceramic dispersed phases, where the light extinction phenomena are governed by light diffraction. By improving the original acquisition system (hardware and software) and the interpretation of the data, we showed that the prototype is sensitive to the concentrations, particle size distribution and differences in the refraction indexes of the dispersed phase.
Ritmo de trabalho no setor de costura em pequenas empresas de confecção
(Universidade Federal de São Carlos, 2007-07-30)
Herculani, Rhadler
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Bento, Paulo Eduardo Gomes
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https://lattes.cnpq.br/2708487098165771
The objective of the dissertation is studying the pace of work in the sector of small sewing businesses of textile manufacturing. This sector has great socio-economic importance for Brazil, because of their economic contribution, as well as the quantity of jobs created. To achieve the proposed objective, was first performed a literature review on pace and organization of work, taking into consideration the factors that affect the pace of work in general, such as technology, training and motivation of staff, among others. Then, there was a review of the literature on small business, construction, highlighting its history, technology, industrial processes and general labor. The following are presented in 3 case studies of small businesses in construction, seeking to deepen the knowledge about factors that influence the pace of work. Finally, the study concludes the importance of human labor and industry of sewing, emphasizing that the pace remains influenced by good working conditions.
Os instrumentos de financiamento às Empresas de Base Tecnológica no Brasil
(Universidade Federal de São Carlos, 2007-07-31)
Pereira, Rosângela Cristina de Carvalho
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Pinho, Marcelo Silva
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https://lattes.cnpq.br/1571881738853119
This dissertation has as central objective to analyze to what extent the available financing instruments for Technological Based Firms (EBTs) in Brazil, are adjusted to the purpose of promote the creation and development of this type of company. This implies, first of all, to carry through a survey and the characterization of extant public and private specific financing forms in the country. Thereafter, through the sample of EBTs searched, to evaluate empirically, the critical opinions, and suggestions presented by the entrepreneurs regarding to the current fomentation lines. The EBTs are technologically dynamic companies, with a dense knowledge base that carry through radical or incremental technological innovations in national or international scope. These innovations carry out the central role of these companies. As they are companies based on the technological development, the EBTs have specific functioning characteristics. These companies main aspect is the technological development, which causes in the majority of the cases, the lack of tangible assets that can serve as guarantees in the attainment of conventional credits. Thus, the EBTs needs highly specialized human capital and an initial financial resource for the research and the development given that, in this phase generally the companies still don't have commercialized products and, consequently, positive cash flow to guarantee its sustentability. Resulting from these specificities, the EBTs located in peripheral economies face other obstacles jointed to the macroeconomic environment, as raised basic taxes of interests, incipient market capital, raised competition of transnational companies, small extension of the markets, not consolidated systems of innovation, lack of joint in federal level of the governments to the innovation and technological development incentive of each country. In relation to the private financing, it is boarded the venture capital funds, a financing modality widely used in some countries, as United States and Israel. In these countries this modality is well succeed. However, the intense active role of the governments in articulation and promotion of this industry in both cases is observed. It is also dialed with the election and monitoring costs with the enterprises selected by venture capital funds. To explain this relationship, the Agency Theory is utilized, in which the relationship between the Investor and the Entrepreneur is complicated by the lack of transparency between the entrepreneurs and the risk investors and also by the availability of information in this relationship. Beyond the described difficulties, in Brazilian case, the venture capital faces difficulties regarding to the legal guarantees in the effective investments, therefore the Brazilian legal environment still does not promote adequate corporative governance. Thus, the legal environment of the country also affects the getting of capital for this modality. Finally, the results and the analyses on the EBTs behaviors in Brazil in the studied period are pointed, from the empirical research, and the profile of this EBTs are traced as well as its demand for financing.
Utilização e destino do carbono orgânico dissolvido em um reservatório eutrófico (Barra Bonita, SP)
(Universidade Federal de São Carlos, 2007-07-31)
Panhota, Rafael Spadaccia
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Bianchini Júnior, Irineu
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https://lattes.cnpq.br/0659731944736389
The stocks of dissolved organic compounds from the aquatic environments represent one of the largest bulks of active organic C in the biosphere. It is thoroughly accepted that the dissolved organic matter represents a dynamic component in the interaction among geosphere, hydrosphere and biosphere and as such, has potential to influence the global carbon cycle. Perhaps the most important characteristic of the dissolved organic matter is its bioavailability potential. Due the complex mixture of organic compounds, ultrafiltration techniques have been used to fractionate DOM in compounds of different molecular weights seeking for better understanding of dynamic and bacterioplankton uptakes. In this context, this study aim to quantify the seasonal variation of dissolved organic carbon concentrations; the proportion of high and low molecular weight compounds and also to verify such variations in function of some limnological variables of an eutrophic tropical reservoir (Barra Bonita, SP). Also, through bioassays, to determine the loss mass coefficients and the degradation routes of different resources (DOC presents in reservoir s water and Pistia stratiotes and Eichhornia crassipes leachates) and their high (> 10 kDa) and low (< 10 kDa) molecular weight fractions. The results showed that DOC concentrations were higher in the rainy season, probability due the increase in primary production (stimulated by the largest concentration of nutrients, mainly phosphorus) and allochthonous material input, with predominance of compounds of high molecular weight. In the bioassays, the leaching of aquatic macrophytes presented higher loss mass coefficients than DOC in the reservoir s water, which the main mineralization route was the fast oxidation biological/chemistry (labile fraction). The POC formation generated low yield, being P. stratiotes leacheate higher POC producer than E. crassipes. The leachates with low molecular weight compounds were more uptaken than high molecular weight and they generated higher oxygen demand. In the decomposition experiment of reservoir s DOC, the slow oxidation biological/chemistry (refractory fractions) was the main mineralization route, the POC formation presented low yield and the oxygen demand was smaller in relation to the leachates. The results indicated possible variations in the use and fate of DOC for the bacterioplankton of different areas of the reservoir.
Estudos físico-químicos do efluente produzido por fossa séptica biodigestora e o impacto do seu uso no solo
(Universidade Federal de São Carlos, 2007-08-01)
Faustino, Adriana Soares
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Nogueira, Ana Rita de Araújo
;
https://lattes.cnpq.br/7034773971317045
;
https://lattes.cnpq.br/0904156785149575
The generation of effluent from the sewage treatment is daily increasing then its final disposition represents a mandatory question to be answered. An alternative is its agricultural utilization such as organic fertilizer as a partial substitute of mineral fertilizer. This practice, beyond inherent benefits due to nutrients recycling promotes agricultural water reuse, which is responsible of around 70% of the total water consumption in Brazil. It was developed a research following the stages of the domestic sewage treatment in the anaerobic system called Septic Cesspool Biodigester , developed by Embrapa Agricultural Instrumentation, and also the impact observed in the soil after the application of the treated effluent. Three samplings were done in the different biodigestion chambers which were inoculated with either ovine or bovine manure. These effluents were analyzed according to its original state (liquid), regarding to the determination of some parameters such as conductivity, pH, OBD, OCD and solids content. Other analyses of the effluent were done in the solid obtained after freeze drying of the raw treated effluent. There were determined the mineral composition of the effluent, using the ICP-OES technique. The effluent organic matter was characterized by FTIR, 13C-NMR and EPR spectroscopies and, elemental analysis. The effluent presented alkaline character and significant salts concentration for both systems, high quantity of NNH4 + and low content of N-NO3 -, characteristic of anaerobic systems. The elemental analysis of the solid obtained after the liquid freeze drying, showed that there was not a variation tendency in the percentages of C, H and N during biodigestion process. These values were similar to the either ovine or bovine inoculated systems, and to the different samplings. The effluent presented a quantity of macro e micro nutrients. Through the spectroscopic characterization of the organic matter present in the freeze dried material, it was possible to observe that there were not noticeable variations in the FTIR spectra in the course of the process monitoring. The 13C NMR supplied information about aromatic and aliphatic groups, showing that the effluent presented a high aliphatic content. The soil, classified as Yellowredish Lattosoil with sandy phase, was submitted to the effluent application during three years and was used for the goiaba orchard. Thus, there were compared the effects effluent in comparison of the NPK mineral fertilization as well as the soil of the native forest at the side of the orchard. Determinations of pH, conductivity, macro and micro nutrients content, TOC and LIF were done for the intact soil. Soil HA were extracted and characterized according to their elemental composition, FTIR, 13C NMR, EPR and solution fluorescence. The application of the treated effluent produced an increment in the pH value, mainly in the superficial layer. There was observed nutrients increment in soil submitted to the effluent application when compared with the NPK fertilized soil. Alterations in the humic fraction of the analyzed soil (after effluent application) were observed when compared with the forest and NPK samples. Results obtained by 13C NMR and EPR detected a general diminution of the aromaticity and the humification degree of organic matter, as a consequence of the aliphatic character of the organic matter present in the effluent. The humification degree of HA extracted from the applied effluent soil, determined by LIF and solution, were very similar to the ones observed in the mineral fertilized soil. The effluent supplied macro e micro nutrients in significant quantities to the soil, and it was not observed salinization effect in the analyzed depths. These results show the benefic effect of the utilization of Septic Cesspool Biodigester effluent regarding to the soil fertility.
Um portal para o P2PGrid
(Universidade Federal de São Carlos, 2007-08-01)
Lisboa, Willian Borges
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Trevelin, Luis Carlos
;
https://lattes.cnpq.br/5082419783043736
;
https://lattes.cnpq.br/8142568933513444
In the ongoing informatics context, applications oriented technologies that envisage computational power is leading to the Development of distributed cooperative and shared systems known as Computational Grid. The accelerated growing of Computer networks and its interconnecting communications means make viable the use of such systems that aims to occupy its machines idle time with the objective of providing a high distributed computational power. Facing this, several researches in Computer Sciences has been conducted and developed exhaustively, one of it is the P2PGrid (1) which is based on a infrastructure Development to support computational grid creation through distributed resource sharing via mechanisms that make this infrastructure transparent. As computational grid reach its objectives of high computational power through Computer networks idle resource sharing , the need of a high computational power at low costs stimulates new Research projects and computational systems Development to attend this definition. The use of Portals as middleware mechanisms between the User and Grid is becoming ever more common, preserving the grid transparency and integrity. This work aims to create a Portal to the P2P Grid environment that could meet the existing standards besides bringing new approaches and concepts for job submission Management, performance and security. Also, a users credentialing and authenticating mechanisms implementation is proposed. Such proposals aim to power-up the control and security levels when using the P2P Grid as well as to facilitate its Access and utilization.
Refrigeração evaporativa por aspersão em telhas de fibrocimento: estudo teórico e experimental
(Universidade Federal de São Carlos, 2007-08-01)
Roriz, Victor Figueiredo
;
Roriz, Maurício
;
https://lattes.cnpq.br/6355579765506588
;
https://lattes.cnpq.br/8060461016711300
This research focuses the evaporative cooling by water aspersion on wavy cement fiber tiles in the city of São Carlos, SP, seeking to use it to reduce the buildings heat gains. A theoretical model was developed, based on classic equations of fluids mechanic, applied to iterative calculations of heat flows on the tile superior surface, considered as control surface. In the work development, this model was progressively adjusted to experimental data obtained in a test cell, exposed to the local climatic conditions, with the monitoring of superficial temperatures of both faces in two tiles, one maintained dry and other under intermittent aspersion of water. The research results indicated that, despite of still being susceptible to improvement, the theoretical model already presents quite satisfactory approach with the measured data. Applying a statistical adjustment to the proposed model of iterative heat flows calculation, it was obtained a correlation coefficient between measured and estimated temperatures of 0,999 and a standard deviation of 0,35 ºC. During the experiments, the average evaporative heat flow was 409 W/m2. Theaverage water volume evaporated was 0,7 l/(m².h), corresponding to an average difference of temperatures among the compared tiles of 5,12 K, for the daylight period. Due to the growing need of energy consumption reduction, this procedure seems to be a good option to reduce buildings thermal load, if compared to conventional air conditioning systems
Determinação voltamétrica de aspartame e ciclamato de sódio em produtos dietéticos empregando um eletrodo de diamante dopado com boro
(Universidade Federal de São Carlos, 2007-08-03)
Medeiros, Roberta Antigo
;
Fatibello Filho, Orlando
;
https://lattes.cnpq.br/9859737944357808
;
https://lattes.cnpq.br/3760577547828061
The development of electroanalytical procedures for aspartame and sodium cyclamate determination in dietary products using a boron doped diamond (BDD) electrode and the square wave voltammetry (SWV) is reported in this work. The first procedure development is reported in related to the determination of aspartame in dietary products employing BDD electrode and the SWV technique after optimization of the experimental conditions. The recovery of aspartame from 8 samples ranged from 95.9 % to 104.4 % of the added amount. The analytical curve was linear in the aspartame concentration range from 9.9 x 10-6 mol L-1 to 5.2 x 10-5 mol L-1 with a detection limit of 2.3 x 10-7 mol L-1. The relative standard deviation for 5 successive determinations of 1.0 x 10-4 mol L-1 aspartame was 0.17 % and the relative standard deviation for 5 determinations of aspartame in different days was 2.8 %. The concentration of aspartame determined in several dietary products using the BDD electrode and those concentrations determined using a HPLC method are in close agreement (calculated t-values did not exceed the critical values at the 95 % confidence level) and within an acceptable range of error. In the sequence, the analytical determination of sodium cyclamate was studied by oxidation of this substance on BDD electrode employed the SWV. The analytical curve for sodium cyclamate was linear in the concentration range from 5.0 x 10-5 to 4.1 x 10-4 mol L-1 with a detection limit of 4.8 x 10-6 mol L-1. The relative standard deviation for five successive measurements was 1.1 % and the relative standard deviation for determinations of 3.0 x 10-3 mol L-1 sodium cyclamate in five different days was 2,4 %. The recoveries values from five samples ranged from 98.6 % to 106,0 % and the results found using the proposed method agreed at the 95% confidence level with those from a HPLC method. Finally, a procedure for simultaneous determination of aspartame and sodium cyclamate was developed, once the oxidation peak potentials of the aspartame and sodium cyclamate are 1.6 V and 1.9 V, respectively. The analytical curves were linear in the aspartame concentration range from 5.0 x 10-6 to 4.0 x 10-5 mol L-1, with detection limit of 3.5 x 10-7 mol L-1 and from 5.0 x 10-5 to 4.0 x 10-4 mol L-1, with detection limit of 4.5 x 10 -6 mol L-1 for sodium cyclamate. The simultaneous determination of these sweeteners in various dietary products was implemented with success.
Formulação de um indicador de acessibilidade das calçadas e travessias
(Universidade Federal de São Carlos, 2007-08-06)
Keppe Junior, Celso Luiz Guimarães
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Ferreira, Marcos Antonio Garcia
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https://lattes.cnpq.br/2643134259454260
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https://lattes.cnpq.br/0572608906485222
The present dissertation work in Urban Engineering of the Federal University of São Carlos (UFSCar) aims to define an easy and practical form of evaluating the level of service in public spaces destined to the carriers of physical deficiency (sidewalks and streets passages) through the determination of an index that considers the parameters of higher importance by the point of view of wheelchair users. The index is defined through the identification and the ordinance of variables based on physical and environment characterization of sidewalks related to aspects of quality such as comfort, security and conditions of the environment. The weighing scale of the variables of physical and environment characterization of sidewalks (importance degree) is carried through analysis based on wheelchair users perception, therefore defining the ISPA - Index of Sidewalks and Passages Accessibility, and verifying its functionality through auditor work also performed with wheelchairs users advice in two places of São Carlos city. Through this tool of evaluation, the agencies of road management can evaluate the quality of the public spaces in a total route or specific stretches of the essential displacements for the real participation of the person with locomotion difficulties in society.