Browsing by Issue Date, starting with "2005-05-20"

Filter results by year or month

Now showing 1 - 20 of 22619

Operadores pseudo-diferenciais e espaços de Hardy
(Universidade Federal de São Carlos, 2005-05-20)
Kapp, Rafael Augusto dos Santos
;
Hounie, Jorge Guillermo
;
https://lattes.cnpq.br/7302904386484949
Obs.:Devido a restrições dos caracteres especias, verifcar abstract em texto completo para download.
Um sistema para recuperação de imagens com base em características geométricas, conjuntos nebulosos e indexação métrica
(Universidade Federal de São Carlos, 2005-05-20)
Gavioli, Alan
;
Biajiz, Mauro
;
https://lattes.cnpq.br/8331600770992494
In this work, the MIGFIR (Metric Indexing and Geometric Features-based Image Retrieval) system is presented. This system was developed mainly to make possible to index and retrieve certain image classes (like human face images, for example) with efficiency and accuracy using geometric measures, two new similarity functions and the metric access method called Slim-tree. This system also allows configuring important parameters during the definition of queries and makes possible to apply fuzzy sets and related concepts so that the language used in search expressions of one of the query classes that are supported be considerably close of the language usually applied by human beings. Efficiency and accuracy of the system at the execution of queries on several real and synthetic human face image sets are also presented. About efficiency, the obtained results show that MIGFIR can promote a quite considerable reduction of the execution time of queries in comparison with a similar approach that applies sequential scanning of the data. About accuracy, the results show that performance is satisfactory during the retrieval of human faces similar to certain example-images.
Uma arquitetura baseada em componentes para adaptação de conteúdo na Internet
(Universidade Federal de São Carlos, 2005-05-20)
Claudino, Renato André Takayama
;
Souza, Wanderley Lopes de
;
https://lattes.cnpq.br/3742302894743620
;
https://lattes.cnpq.br/4530488988781991
Transientes, monoestabilidade e biestabilidade em processos de oxidação de eletrodos metálicos com formação de filmes : alguns casos simples
(Universidade Federal de São Carlos, 2005-05-23)
Brito, Gilberto Augusto de Oliveira
;
D'Alkaine, Carlos Ventura
;
https://lattes.cnpq.br/8699821828310072
;
https://lattes.cnpq.br/8769820118747855
The simulation of simple models studied in this thesis showed that experimental current density/potential curves from processes of metal electrode oxidation with film formation can present peaks or discontinuities besides these curves can present the polarographic wave shape (sigmoidal shape). The experimental current density/potential curves wouldn t present hysteresis on quasi-stationary conditions. The peaks can be the result of measures made in non stationary conditions (transient conditions with measure times smaller than the relaxation time of the physical system under study) or conditions which looks like stationary conditions (transient conditons with measurement times bigger than the relaxation time of the physical system under study which could seem as stationary conditions) and the descontinuities would be the result of measures made in conditions which looks like stationary conditions. The experimental current density/potential curves presenting a peak or polarographic wave shape under conditions which looks like stationary conditions would point out that the physical system is in a monostability zone while those curves presenting discontinuities under conditions which looks like stationary conditions would point out that the physical system is in a bistability zone. Another important conclusion (obtained from the simulations) is that peaks and discontinuities in experimental current density/potential curves which are associated to the active/passive transition phenomenon can be the result of others phenomena. The stationary current density/potential curves simulated with the one adsorbed specie and constant dissolution model and the two adsorbed species and constant dissolution model, present the polarographic wave shape (this one due to these models are in a monostability zone) while the transient current density/potential curves present a peak. The stationary current density/potential curves simulated with the one adsorbed specie and oxide dissolution depending on coverage degree model and the two adsorbed species and oxide dissolution depending on coverage degree model can present the polarographic wave shape or a peak or hysteresis (hysteresis is due to these models are in a bistability zone) while the transient /E curves can present a peak or discontinuities (discontinuities are due to these models are in a bistability zone). Besides, the two adsorbed species and oxide dissolution depending on coverage degree model can present a kind of irreversibility when it is in a bistability zone.
Linguagem de padrões para apoiar o projeto de material instrucional para EAD
(Universidade Federal de São Carlos, 2005-05-23)
Talarico Neto, Américo
;
Silva, Junia Coutinho Anacleto
;
https://lattes.cnpq.br/6200743168568684
Aplicabilidade de padrões de interação humano-computador e de engenharia de software no processo de desenvolvimento de sistemas interativos
(Universidade Federal de São Carlos, 2005-05-23)
Silva, André Constantino da
;
Silva, Junia Coutinho Anacleto
;
https://lattes.cnpq.br/6200743168568684
Both Software Engineering (SE) and Human-Computer Interaction (HCI), two areas within Computer Science, propose process models, methods, techniques and tools for interactive systems development. However, those areas differ in their view of the task: while the SE main focus is the software product and its process, HCI focuses the interaction aspects between men and machine. However those areas are complementary, and there is a need of integrating the two views in the interactive systems development in a way to approach and treat, in a clear and defined way, interaction and implementation jointly. Motivated by that need, and the idea of increasing the developed systems quality, this work explores the concept of computational patterns in the support to the interactive systems development so that these are to a process model. Relationships between SE and HCI patterns are identified, thus promoting the integration of SE and HCI views.
Ação afirmativa e cotas: um percurso pela imprensa brasileira (de 1995 a 2002)
(Universidade Federal de São Carlos, 2005-05-23)
Santos, Ana Elisa de Carli dos
;
Silvério, Valter Roberto
The racial question acquired centrality in the Brazilian context lately, due to mobilization arond the offer about especific public politics towards to black people, or affirmative action . This theme is fundamental because propose one reorientation in the sense of the socials relations with basis the race and colour. In this context, the press mass media has been one important sphere of boarding about the topic of the affirmative action. The captivation of the perceptions and representations furnished by national writting printing press constitute fountain of investigation of this search. The techniques of the content analysis and framing analysis has been used to capture the types of orientation that structure the news. The theme is bras in the mass media and this space of discussion supply one ample possibility of negotiation and political and social legitimacy of the interests of black people in Brazil.
Análise comparativa dos mecanismos de governança das redes agroindustriais avícolas da macrorregião de Ribeirão Preto SP e de Santa Catarina.
(Universidade Federal de São Carlos, 2005-05-24)
Pinotti, Raquel Nakazato
;
Paulillo, Luiz Fernando de Oriani e
;
https://lattes.cnpq.br/9919942357089937
This text has as objective main to carry through a comparative analysis it enters the power network of being poltry of the macroregion of Ribeirão Preto of the state of São Paulo and of the state of Santa Catarina, taking for base the individual and collective action of the actors and its main dynamic resources of power (constitutional, technological, financial, legal politicians and organizacionais ). From the studies of the characteristics of the actors of each network (number of participants; function, types of relation, structure and distribution of being able), were possible to verify that the catarinense poltry network presents more dynamic resources of power, greater coordination and harmony between its actors. The catarinense network has presence of formal relations of production, significant presence of dynamic resources of power and the legitimacy of the great industrial firms in the coordination of the system of integration and the network, while that the São Paulo network presents sufficiently distinct configuration: more types of actors (the independent agricultural producers, the intermediate and the corrector of chicken), low representation of its actors, informal relations of production and minor presence of dynamic resources power. In this context, it was possible to conclude that the networks possess trajectories of dependence (path dependence) well distinct, that lead to the structure of the distribution of dynamic resources of power presented.
C-CORE : uma Ferramenta de programação para construção e reuso de componentes
(Universidade Federal de São Carlos, 2005-05-24)
Souza Neto, Raphael Marcilio de
;
Prado, Antonio Francisco do
;
https://lattes.cnpq.br/2668568143800755
;
https://lattes.cnpq.br/5956634284343253
The Software Development contains several activities that are not always supported by tools that aid the Software Engineer and automate great part of his activities. Different researches have been accomplished and many resources have been spent aiming to construct tools that support the Software Development Process. Among these tools, stand out those that support project and implementation activities, and that are integrated with tools that support other activities of the software construction process. With those tools, it can be obtained a larger consistence of the results that are produced along the whole software development cycle. Another important point of the development process is related to obtain a software with better quality and less cost. One of the areas that is highlighted in the software production with quality and less cost, is those that researches the software components reuse. Thus, the Software Component Oriented Programming Tools integrated with modeling tools that aim mainly to improve the software productivity based on reuse is standing out. Motivated by these ideas, this work presents a tool denominated C-CORE, that supports the project and implementation of components and their applications integrated with other modeling tool, denominated MVCASE.
Estudo do desempenho de um precipitador eletrostático operando na captura de partículas submicrométricas e nanométricas
(Universidade Federal de São Carlos, 2005-05-24)
Falaguasta, Maria Carolina Ribeiro
;
Coury, José Renato
The removal of submicron particles from gaseous streams is becoming an increasingly important operation, both in industrial (nanotechnology) as well as in occupational (inhalation of particula te matter) applications. Among the equipments commonly employed for the removal of particula tes of the gaseous stream, the electrostatic precipitator, ESP, is the one capable of removing particles of such size with high efficiency. Furthermore, it has other advantages as the low pressure drop and the flexibility of working at higher temperatures. Therefore, the objective of this research was to evaluate the influence of operational and design parameters in the efficiency of particle removal of a plate-wire ESP operating in the removal of submicron particles. The precipitator was built in acrylic, with copper plates as collecting electrodes and stainless steel wires as discharge electrodes. The study was divided in two stages: the first studied the collection of PM2.5 (high risk particle matter), using alumina, with median diameter of 0.6 mm and maximum diameter of 2.5 mm as test powder, while the stage 2 focused the nanometric range, utilizing particles of sodium chloride, with diameters between 8 and 100 nm. In stage 1, the project parameters analyzed were duct length (L), diameter of the discharge electrodes (2r) and spacing between them (2c); the operational variables were the electric field (E) and the air velocity (v). Each variable was evaluated in two levels, whose values were Lne = 15 and 30 cm; 2r = 0.045 and 0.025 cm; 2c = 4 and 2 cm; E = 5 and 8 kV/cm and, finally, v = 0.5 and 1.0 m/s. The process performance was evaluated through the analysis of the global efficiency of removal of the particula te matter, obtained through isokinetic sampling. In stage 2, the project parameter analyzed were the duct length (Lne), the ratio s/2c and the distance between the collection plates (2s) and the operational variables were the air velocity (v) and current density (j). Each operation variable was evaluated in three levels, whose values were v = 0.125, 0.25 and 0.50 m/s and j = 1.8, 2.8 and 3.8 mA/m2. The project parameters were studied in two leve ls, Lne = 15 and 30 cm and 2s = 0.04 and 0.06 m. The process performance was evaluated through the analysis of the removal efficiency of the particulates obtained by particle counting, with the use of the Condensation Particle Counter 3007, from TSI. It was observed that the precipitator possesses high collection efficiency, even in the nanometric size range, were efficiencies larger than 99% were obtained, depending on the used configuration. As expected, the increase in air velocity, as well as the decrease of the collecting plate length and of the generated current caused a decrease in the efficiency. Conversely, larger spacing between plates resulted in an increment in the efficiency, phenomenon also observed by some other researchers for larger particles. The ratio s/2c did not show a clear tendency in particle removal. When compared to models from the literature, the one that offered the better adjustment to the experimental data was the classic Deutsch model when used with a drag coefficient given by a modified version of the Li and Wang (2003a e b) equation.
Método baseado em processamento digital de imagens para diagnóstico precoce de micro-estruturas dentárias
(Universidade Federal de São Carlos, 2005-05-25)
Ohnishi, Yuji de Oliveira
;
Cruvinel, Paulo Estevão
;
https://lattes.cnpq.br/7924553462118511
This work presents a new method based on digital image processing dedicated to establish diagnosis of dental microstructures. The system uses image techniques such as segmentation, Hough Transform for circular pattern recognition for dental microstructures, and Bayesian technique to classify patients that present different dental structures. Results show the qualification of the method. Also, the adoption of the DICOM standard has shown the suitability of the method to be used in clinical and specialized environments.
Os professores de matemática e a geometria: opiniões sobre a área e seu ensino.
(Universidade Federal de São Carlos, 2005-05-25)
Crescenti, Eliane Portalone
;
Tancredi, Regina Maria Simões Puccinelli
Based on the professional experience with the Geometry teaching and on the existing bibliography which is approaching the abandon of Geometry and its teaching, the possible causes of this abandon and the importance of its teaching as well as its ransom in the Mathematics classes appeared disquietude which originated the present research, of which objective constitutes in knowing how the Geometry teaching developed in the 5ths 8ths grades of the Elementary School (Ensino Fundamental) and what the Mathematics teachers thought about Geometry and its teaching. Being so, the focus of this research was teachers, professionals whose voices must be heard in order to understand the school reality better. The data collecting involved interviewing nine Mathematics teachers with different years of experience and the methodological foundation of our work was based on their narratives. Their narratives showed that they have some lack of autonomy as well as precarious knowledge of the importance of the Geometry contents. The justification of the more experienced teachers did not differ from the ones placed by the less experienced teachers, being the less experienced teachers very attached to the bureaucratic organization and basing themselves more on the didactic books. More emphasis in the Geometry teaching was noticed among the more experienced teachers and these teachers were more successful and more respected by the students, although their practices were closer to the traditional teaching. The resources used by two of the less experienced teachers were closer to the more modern pedagogical approaches. We have also noticed, in general, that the educational programs basic or continuing education have not backrested the educational practices with the Geometry teaching and that in the school there isn t support for this developing either. On the other hand, to work with narratives turned possible to know the teacher practice better, in order to indicate subsidies to the present situation of the Geometry teaching to improve that situation.
Avaliação do repertório verbal inicial em crianças com deficiência auditiva pré-lingual usuárias de implante colclear.
(Universidade Federal de São Carlos, 2005-05-29)
Gaia, Tatiana Francis
;
Souza, Deisy das Graças de
;
https://lattes.cnpq.br/4404800720856419
The cochlear implant is a device that allows deaf people to detect surrounding sounds, including the human speech, which are transformed in electric stimulation of the cochlea. This is just the starting point for those who were deprived of audition, especially if the deafness occurred before language acquisition (pre-lingual deafness). After the implant, the person needs to learn (or relearn) to listen, and this is an important research and intervention issue. The goal of this study was to describe the evolution of the listening behavior in pre-lingual implanted children, in a period of time correspondent to the first 26 months after the implant. The analysis consisted of word recognition, figure naming and echoic behavior. In the recognition task, for each dictated word the participants were required to identify the corresponding figure (between three possible figures simultaneously available). On the figure naming task, a figure was shown and the participants were required to pronounce its name. On the echoic behavior required that a dictated word should be repeated by the participants. Twenty words were tested on each evaluation for word recognition, and the same twenty words were tested on the two remaining tasks. A microcomputer presented the participants with the stimuli (so oral-facial clues were avoided), and recorded responses that required selection, spoken words by children were videotaped and transcribed by direct observation. Three successive evaluations were performed with a mean interval of 5 months between them. Pre-training was conducted in order to orient the children on how to do the tasks and use the mouse. The tasks were applied individually, and the data analysis was also performed separately for each participant. The initial evaluation showed intermediate scores on word recognition and low scores or no correct answers on figure naming and echoic behavior. Progressive and substantial increase in word recognition naming and echoic behaviors also improved, but the magnitude of progress was much smaller than that observed in word recognition. In addition to the correct/incorrect criterion of analysis, answers that were close to the vocal emission considered correct (partially correct answers) were also analyzed, and a distinction between wrong answers and no answers at all was made. The evaluation of the partially correct answers was important for the identification of a progressive improvement on the echoic behavior and figure naming performances in which, although the children didn t reach the absolute correct criterion, they showed a systematic progress and attested learning of these important behaviors, which are part of language and whose acquisition is dependent upon audition. A second important observation was the reduced occurrence of no answers in the initial evaluations and the absence of this category of responding in the last evaluation. The improvements observed in the children s behavior are important indictors of learning oral language (comprehension and intelligible speech) after the implant; in the other hand, the gaps observed in their performances strongly suggest the need for educational interventions that aim to accelerate the acquisition of the implant user s repertoires, as well as to refine them, in order to maximize the benefits provided by this device.
Uma heurística para a programação da produção de sistemas flexíveis de manufatura usando modelagem em redes de Petri
(Universidade Federal de São Carlos, 2005-05-30)
Maggio, Eduardo Gomes Ribeiro
;
Morandin Júnior, Orides
;
https://lattes.cnpq.br/4192845106907956
;
https://lattes.cnpq.br/4851579746092098
The Petri Net based Search has been shown as a promising way to solve Flexible manufacturing Systems (FMS) Scheduling Problem. However, the response time is critical since it s a system with high computational complexity. Focusing the reduction of response time, this work proposes a heuristic for Petri Net based Search to solve FMS Scheduling problem of makespan minimization. Experiments showed improvements on response time reduction comparing with prior works
Um método de análise de cenários para sequenciamento da produção usando lógica nebulosa
(Universidade Federal de São Carlos, 2005-05-31)
Silva, Allan Rodrigues da
;
Morandin Júnior, Orides
;
https://lattes.cnpq.br/4192845106907956
Production planning in automated manufacturing environments is a complex task which comprehends, among other activities, the production sequencing. One of the techniques used to determine the best production sequencing is the simulation. All possible sequences can be simulated and, right after that, the sequences with the best performance are verified, according to some criteria. However, due to the combinatory nature of the sequencing, the simulation of all possible combinations takes long time, becoming quite impracticable in many cases. Besides, events that were not programmed occur frequently in automated manufacturing environments and the decision maker must be fast choosing alternatives. Aiming to contour this problem, this work proposes a fuzzy analyser of sceneries for the production sequencing (ANCSP). The goal is to reduce the quantity of sequences to be simulated by the decision maker when non programmed events occur in the productive system, according to a defined performance criteria. The maximum quantity of generated sequences is calculated based on the time avaliable to realize the simulation. The proposed model intends to support the usage of the simulation technique by the decision makers. The ANCSP was implemented and various tests were performed. A specific model of flexible manufacturing system was considered to perform the tests. The performance of the ANCSP was analyzed comparing its results with those presented by a simulation software, for the same test sets and in accordance to the performance measures established.
Extensibilidade de ambientes virtuais colaborativos através de estórias interativas não lineares
(Universidade Federal de São Carlos, 2005-05-31)
Duarte, Diego Daniel
;
Araujo, Regina Borges de
;
https://lattes.cnpq.br/8964123297688432
;
https://lattes.cnpq.br/3770885649274622
3D Collaborative Virtual Environments (CVE) applications have been impelled mainly by the computer games industry, military and industrial training and product design development. However, most of the existing systems are focused on specific tasks and have a supporting structure, which is closely tight to the application. As a consequence, a change in the application usually means a change in the supporting structure too, making it difficult and expensive to develop new or to extend existing CVEs. This work presents a novel approach to building and extending CVEs through the integration of interactive non-linear stories and Virtual Reality. With this approach, CVEs applications are composed as non-linear stories which can be changed either completely or partly, making it easier for developers to build and/or extend CVEs applications, such as highly dynamic marketing campaigns to 3D virtual shops, customized training courses, educational and entertainment games, etc. To allow the description of the CVE through interactive non-linear stories was developed a description language based on XML, named VEML. The use of a VEML for building a CVE application can facilitate the communication among the different professionals involved in the building of complex VE applications.
AMGra: uma abordagem para migração gradativa de aplicações legadas
(Universidade Federal de São Carlos, 2005-05-31)
Fontanette, Valdirene
;
Prado, Antonio Francisco do
;
https://lattes.cnpq.br/2668568143800755
Along the time the applications usually need to evolve to catch up with and to assist to the new technologies that appear or get mature in the different computing areas, as it happens, for instance, with the programming languages. Starting from that demand, new researches are being accomplished to offer support to this development. This situation was improved with the ripening of Web technologies, once the need of the company nowadays is not always to convert an application totally, but to adapt these applications to accommodate these new technologies. The modernization of old applications, denominated legacy applications, is an arduous and a high cost task for the companies. Although there are several approaches that support this process in the literature, there is still a lack of resources that offer flexibility, take advantage of previous investments of the companies and get practical results. This way, the modernization process in the companies is almost always accomplished in a manual and "ad-hoc" form. Based on these ideas, this work presents AMGraA, an approach for gradual modernization of legacy applications, reconstructing them to attend to new technologies that came out along the time. This research project resulted of a partnership among GOES (Group of Software Engineering), a software development company, and FAPESP in support to the research and the development in the small companies.
Sensibilidade comportamental cruzada entre anfetamina e nicotina induzida na adolescência persiste até a idade adulta
(Universidade Federal de São Carlos, 2005-06-06)
Santos, Gabriela Cristina dos
;
Planeta, Cleopatra da Silva
;
https://lattes.cnpq.br/2514762545280942
Behavioral sensitization is a progressive and enduring enhancement of the motor stimulant effects of psychostimulants and other drugs of abuse, elicited by repeated administration of these drugs. This phenomenon has been extensively studied in experimental animals and has been implicated as a key component in drug addiction. Nicotine and psychostimulants are often abused in combination. The aim of the present study was to examine the cross-sensitization between nicotine and amphetamine in rats exposed to repeated treatment with the drugs during adolescence. We evaluated the effects of the treatment with nicotine (0.4 mg/kg; s.c.) or amphetamine (5.0 mg/kg, i.p.) from postnatal day (P) 28 P34 on amphetamine- (1.0, 2.5, 5.0 mg/kg, i.p.) or nicotine induced locomotor activity 3 (P37) or 10 days (P44) after drug treatment ended. Further, the effects of amphetamine or nicotine were examined 36 days (P70) after nicotine or amphetamine treatments to determine whether the effects of drug exposure during periadolescence persisted into adulthood. Adolescent animals pretreated with amphetamine were sensitized to the locomotor-activating effects of nicotine. Moreover, the pretreatment with nicotine during adolescence increased locomotor activity induced by 5.0 mg/kg of amphetamine. Although adult rats are less sensitive to nicotine, this drug significantly increased the locomotor activity in adult rats that were pretreated with amphetamine during adolescence. In addition, in adult rats, the pretreatment with nicotine during adolescence increased locomotor activity induced by 1.0 mg/kg of amphetamine. These data suggest the crossensitization between amphetamine and nicotine in adolescent rats. Moreover, the sensitization is long-lasting and persists until adulthood.
Contribuição do uso de modelagem de processos de negócios na implementação de ERP de fornecedores nacionais em pequenas e médias empresas.
(Universidade Federal de São Carlos, 2005-06-06)
Silva, Fernanda Pereira Carneiro da
;
Pereira, Neocles Alves
;
https://lattes.cnpq.br/3744216524256924
The purpose of this study is to investigate the implementation of Enterprise Resource Planning (ERP) in small and medium enterprises (SME) in whom it says respect to the Business Processes Modeling (BPM) use. Until little time behind, the SME were not using conventionals of system ERP. Observed the BPM use, for the suppliers, and verified it influence in the integration of the internal processes of the business of the customer. Due to the fact that the utilization of (ERP) in small and medium enterprises is a recent issue, most of the reviewed literature was found in articles and books addressed to big companies. Substantive matters on business processes modeling (BPM) were found in international articles and books. Hardly ever, BPM, ERP or SME issues were discussed in the same article or book. Therefore, for this inquiry, one searched the information in the suppliers and customers of ERP, by means of differentiated questionnaires, that had been applied in the national supplying greaters of systems and in some customers of the system of these suppliers. This research contributed with the systematization of theoretical information regarding the concepts of BPM and in the vision of the ERP sustem in SME. With the carried through research of field, it made possible to get real information of the main characteristics of implementation with the use of the BPM for the suppliers and of its interference in the internal processes of business of some using customers, showing indications of that the BPM contributes for a bigger integration of the internal processes of business and that this option is made by the customer and that all the suppliers of this research had conditions to take care of it.
Ensino e pesquisa no centro universitário o caso da UNORP
(Universidade Federal de São Carlos, 2005-06-07)
Corrêa, José Luiz Falotico
;
Marques, Waldemar
The present work aims to perform a study in the Universitary Institution, specially at Centro Universitário do Norte Paulista Unorp about the teaching and researching activities based on an explanatory research using a Case Study methodology. In order to obtain the data that is based on the performance analysis, using the bibliography and documental research to establish the theoretical reference that supports our work and our considerations. After this survey questionnaires were handled to 55 teachers from the universitary institution, which is the object of our work. In these matters we aimed to raise concepts which would be the basis of our analysis, that is the teaching excellence concept, the relations between teaching and research and the methodologies adopted in the class which may be considered as research activities. Another aspect presented is related to the experiences brought by the teacher about his academic and personal life, as well as our school life course is part of the work s first chapter. These elements support the explanations presented and lead us to understand better what kind of research is conducted in the universitary institutions and which place it occupies in the role of pedagogical and teaching activities that are responsible to major the students from different courses