Browsing by Issue Date, starting with "2007-08-20"

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Esfera pública burguesa e esfera pública proletária: as perspectivas de Habermas e de Negt e Kluge
(Universidade Federal de São Carlos, 2007-08-20)
Campato, Roger Fernandes
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Maar, Wolfgang Leo
;
https://lattes.cnpq.br/8746615407370574
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https://lattes.cnpq.br/7053804306415312
The goal of this thesis is to establish a comparison between the concepts of bourgeois public sphere and of proletarian public sphere developed, respectively, by Jürgen Habermas and by Oskar Negt and Alexander Kluge. In this sense, the study intends to demonstrate that, on contrary to Habermas eminently abstract perspective, the perspective suggested by Negt and Kluge is based on a non-deformed interpretation of marxist dialectics, allowing for the potential for emancipation present in the original critical theory.
Implementação da iniciativa unidade básica amiga da amamentação : educação continuada e prática profissional
(Universidade Federal de São Carlos, 2007-08-20)
Martins, Rosa Maria Castilho
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Montrone, Aida Victoria Garcia
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https://lattes.cnpq.br/9011731777978672
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https://lattes.cnpq.br/2507454981640212
Although the benefits that the maternal breast-feeding brings for the baby, the mother, the family and the society, wean it precocious have been frequent practical. Some authors recognize that, amongst the diverse factors that can influence the practical of the maternal breast-feeding is a performance of the health professionals and, in many situations, these professionals are not enabled to take care of to the women during the gestation and/or period of maternal breastfeeding. Some measures had been adopted for governmental bodies, with purpose to increase maternal breast-feeding, between them, Initiative Unit Basic Friend of Maternal breast-feeding (IUBAAM in portuguese), proposal for Health Ministry, that delineates an important paper that the Basic Units of Attention to the Health can play, for the promotion, protection and support of the maternal breast-feeding. To receive the heading of Basic Unit Friend of Maternal Breastfeeding 10 steps will have to be followed, being that the qualification of the team of the unit becomes the basic step for the others one. The present work had as objective to evaluate which the contributions of the course of continuated education considered by the IUBAAM, for the practical of the professionals of health of the maternal-infantile team. It was a descriptive qualitative research. For the collection of the data the following procedures had been carried through: interview and observation of practical of the four professionals of a Basic Unit of Health (nurse, nurse aid, pediatrist and obstetrician) before and after course, accompaniment of the accomplishment of the course, observation of the practical professional and the actions to be developed for the unit after the course. The data of the interviews and the comment, carried through before the qualification course, had shown that the formation of these professionals in the thematic of the maternal breast-feeding was insufficient for the performance of them in this one. The course was evaluated, for the professionals, as a moment important of learning and to share knowledge, being detached the methodology of the problematization as primordial factor in the learning of the contents. The practical lesson, that happens in elapsing of the course, was pointed as basic in the consolidation of the learnings. About to the changes of attitudes in the practical professional it was verified that exists an attempt to change these ones, however, when the action proposal involved a bigger joint among the members of the team and changes in the routines of assistance of the unit, the professionals have had much difficulty to place it in practical. The implementation of the groups of support the mothers and pregnants, pointed for the professionals as one of the most important actions, was the moust difficult activit to be viabilitated inside of the routine of the unit. The alleged reasons had been: the lack of physical space, the reduced number of professionals, the lack of time and the excess of attributions. In such a way we understand that, although to bring important contributions for the practical professional, the qualification course, by itself, does not to provoke great changes in the attitudes of the professionals and the routines of the Unit of health. It is necessary to have a proposal, on the part of the local managers of health, that praises the accompaniment of the process of implementation of the steps considered for the IUBAAM and its posterior evaluation.
A ordenação das variáveis no processo de otimização de classificadores bayesianos: uma abordagem evolutiva
(Universidade Federal de São Carlos, 2007-08-20)
Santos, Edimilson Batista dos
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Hruschka Júnior, Estevam Rafael
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https://lattes.cnpq.br/2097340857065853
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https://lattes.cnpq.br/3711618829552343
Classification is a basic task in data analysis and pattern recognition that requires the construction of a classifier. The induction of classifiers from data sets is an important problem in machine learning. Numerous approaches to this problem are based on various representations such as decision trees, neural networks, decision graphs, and rules. However the interest in Bayesianos methods for classification has grown sufficiently. Bayesian Networks (BNs) learning algorithms can be used to induce Bayesian classifiers. However, BNs learning from data is known to be a NP problem and does not have computational methods capable to identify to the best solution for all the application problems. A very common restriction when learning a BN is the definition of a previous Variables Ordering (OV). The OV represent the possible relationships between the variables in the formation of the structure of BN that describes the problem. Using an adequate OV, learning algorithms are capable to find a solution more efficient. Therefore, this work proposes hybrid approaches to help the process of learning a BN from data for classification. The proposed methods named VOGA, VOGAC e VOEA uses Evolutionary Algorithms to optimize the BN learning process by means of the identification of an adequate variables ordering. These methods use information about the class variable when defining the most suitable variable ordering. Experiments performed in a number of datasets revealed that methods are promising
Música e negatividade
(Universidade Federal de São Carlos, 2007-08-21)
Jurado, Thamara Moretti Soria
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Maar, Wolfgang Leo
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https://lattes.cnpq.br/8746615407370574
;
https://lattes.cnpq.br/2744563948941510
This dissertation intends to investigate Adorno s analysis concerning Beethoven s late style in the attempt of understanding the importance delegated to this composer s works, which led Adorno to identify it with the beginning of a process that would culminate in Schoenberg. For doing that, we will use these comprised fragments in Beethoven s work: the philosophy of music, in special The Style I and II .
Estudo e validação de teorias do domínio lingüístico com vistas à melhoria do tratamento de cadeias de co-referência em sumarização automática
(Universidade Federal de São Carlos, 2007-08-21)
Carbonel, Thiago Ianez
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Rino, Lúcia Helena Machado
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https://lattes.cnpq.br/0315640846525832
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https://lattes.cnpq.br/0446593777033541
The work presented in the dissertation focuses on the study and validation of linguistic theories so as to improve reference cohesion in Automatic Summarization systems, which with the advent of the Internet have received increasing attention due to the urge to manage the huge amounts of on-line textual information that become available each day. In this dissertation we evaluate Seno (2005) s Veins Theory-based proposal and prototype, and present a reimplementation with distinct features based on the analysis of a corpus annotated with rhetoric (RST) and referential information. In addition, we report on the first validation effort for Portuguese for Veins Theory s Conjecture 1 (C1), which constrains anaphora resolution given the rhetoric structure of texts and whose applicability to Automatic Summarization interests us. As a methodological novelty, we put forth the Non-Trivial Precision, a more realistic estimator of C1 s predictive power.
Vedações verticais e suas interfaces no sistema construtivo de edificações
(Universidade Federal de São Carlos, 2007-08-21)
Cardoso, Daniel Luis Antonio
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Novaes, Celso Carlos
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https://lattes.cnpq.br/7340467051481570
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https://lattes.cnpq.br/6865324349881313
The development of a greater number of projects, besides those traditionally elaborated (foundations, architecture, structure, electrical and sanitary-hydraulic installations), have made the constructive process more complex, demanding the participation of several professionals around the projects of edification to discuss and make compatible the present solutions in the interfaces between the subsystems. Construction companies, which invest in the improvement in the projects quality of their edifications tend to increase better results as to their competitiveness in the market, guaranteeing significant efficiency to the whole enterprise cycle and generating higher rationalization for the production process of their buildings. In that sense, the activities referring to the project and to the production of an edification need to be thought in an integrated way. Because there are several the interferences between the vertical sealings and the rest of subsystems of the building that interact with it, the project elaboration of vertical sealings stands out as the instrument for the compatibility of projects, because it has the property to furnish constructive details that present efficiency and constructively to the services made at the construction site. Despite the importance of project-production integration, it can be perceived a certain precariousness in the definitions of interference of the vertical sealings with the rest of the subsystems, reflection of incomplete or indefiniteness projects, leaving to the construction site the need of adaptations. Thus, through bibliographic review and case study in three building sites of a small size incorporater-constructor, the solutions adopted in the sealing masonry interface and in some subsystems are verified.
Juristas autoritários versus juristas liberais o debate estabelecido no campo jurídico brasileiro 1964-1969
(Universidade Federal de São Carlos, 2007-08-22)
Lotúmolo, Marinês Bernardinelli
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Martins Filho, João Roberto
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https://lattes.cnpq.br/4463972200610019
The analysis of the trajectory of the jurists in the period between 1964 and 1969 requires the identification of diverse chains of the same jurists. Three main chains of jurists in this period had been identified the authoritarian, the liberal and the nationalists jurists. For this analysis it took in consideration the position and ideas politicians of each one of the chains. After that, it was searched to identify the trajectory of each one of the groups, in special the observation of the increasing hegemony of the chain of authoritarian jurists, that directly remained in contact with the military governments after April of 1964. While the construction of a new government happened, the performance of the authoritarian jurists became more frequently, permitting a great debate with the idea of the other group of jurists the liberal. The performance of the authoritarian chain occurred in reason much more of the necessity of internal control to the military sphere than in relation to the manifestations of the society.
Desempenho térmico de cobertura verde utilizando a grama Brachiaria humidicola na cidade de São Carlos-SP
(Universidade Federal de São Carlos, 2007-08-22)
Andrade, Nixon César de
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Roriz, Maurício
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https://lattes.cnpq.br/6355579765506588
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https://lattes.cnpq.br/4761868369332802
This work aims to analyze the thermal behavior of a green roof with the Braquiária grass (Brachiaria humidicola), that reaches 1m height, comparing it with a traditional roof (concrete slab on show). Considering temperature and relative humidity data obtained through field measurements in different months, the thermal performance of the green and traditional roofs was analyzed. The inside and outside temperatures, and inside superficial of two test-cells were analyzed. The outside superficial temperatures were estimated through computation program and the solar radiation data and wind speed, necessaries for the use of this program, were provided by the Water Resource and Applied Ecology Center (CRHEA,) and the Engineering School of São Carlos (EESC), both from the University of São Paulo (USP). The results indicate that, submitted to the local climate, the green roof presents optimum performance, particularly for decreasing the temperatures of external and internal roof surfaces. In the same test-cell it was recently realized a similar research, which used the Esmeralda grass (Zoysia japonica), a short vegetation. Comparing the measurement results for cold and hot periods, it was noticed differences between the thermal performance of the two grasses.
A resolução de anáforas pronominais da língua portuguesa com base no algoritmo de Mitkov
(Universidade Federal de São Carlos, 2007-08-22)
Chaves, Amanda Rocha
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Rino, Lúcia Helena Machado
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https://lattes.cnpq.br/0315640846525832
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https://lattes.cnpq.br/0486342889109075
One of the problems of natural language processing systems is to assure referential cohesion in a text. This property allows connecting the text constituents and making it readable. We address the anaphoric phenomenon as one of the main factors of referential cohesion. Anaphors depict a reference relationship between two or more text components, and the interpretation of the anaphor is dependent upon the interpretation of its antecedent. This work is limited to pronominal anaphors, thus, to automatic pronoun resolution. Several algorithms have been proposed to this end. They usually involve (1) identifying the anaphoric component; (2) determining the set of its possible antecedents; and (3) identifying and selecting the most likely antecedent of the anaphor. The lack of anaphora resolution in, e.g., information extraction and automatic translation or summarization may yield non-cohesive texts. Herein we present an adaptation of the Mitkov´s algorithm for pronoun resolution. 3rd person pronouns for Brazilian Portuguese are especially addressed, whose antecedents are noun phrases. This approach has been intrinsically evaluated on annotated corpora. It has also been compared with Lappin and Leass algorithm for pronoun resolution, adapted to Portuguese. Annotations embed morphological, syntactic and co-referential information. The evaluation measure adopted was the success rate. This is defined as the ratio between the number of anaphors correctly resolved by the system and the total number of anaphors in the text. The results of both evaluations are discussed here.
Política e internet : o governo eletrônico da Prefeitura de São Paulo (2001-2006).
(Universidade Federal de São Carlos, 2007-08-22)
Tonhati, Tânia Mara Passarelli
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Azevedo, Fernando Antonio Farias de
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https://lattes.cnpq.br/5459428002829264
This dissertation provides a reflexion about the use of the Communication and Information Technologies (CIT s), particularly, the Internet, by São Paulo city s government. In order to achieve this, we have used, as empirical corpus, the analysis of São Paulo s electronic government politics from 2001 to 2006, we also emphasized both elements which are included in this politics: the City Hall Portal and the Digital Inclusion Plan. This way, we intend to comprehend how and in which extension this politics integrates the city s government with the actual installation demands of a new management model, which, in its turns, is defined by the Market principles. It is also important to understand how São Paulo s city government intends to enlarge citizens participation in the public management. With the aim to measure these elements, this research is based on five participation degrees, called digital democratic degrees. To reinforce this investigation, we have studied documents (such as laws, decrees, bylaws and communications), interviewed people responsible for the electronic government politics in the designated period, and we have evaluated the City Hall Portal as well as the users of the telecentres, idealized by the Digital Inclusion Plan.
Estudo das reuniões de coordenação da produção em obras
(Universidade Federal de São Carlos, 2007-08-23)
Haka, Osmar Roberto
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Serra, Sheyla Mara Baptista
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https://lattes.cnpq.br/8528385567782505
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https://lattes.cnpq.br/5713242578306999
This work presents an exploratory study on the coordinating meetings, in the stage of production of the Civil Engineering in the subsector constructions, classifying the different forms of management, raising the ways of communication and identifying which are the fiscalized elements. Also will be treated the questions to the relations between the participants of the meetings, conditions for the establishment of partnerships between them and how its activities are made compatible. The planning meetings belong to the operational level, where the directions of the Production Projects and the Projects to Production, will be had, will be transmitted, if necessary adapted, made compatible and executed, propitiating a formal occasion, in which tools and techniques of management can be transmitted and be evaluated. Amongst main participants of the planning meetings, we can cite representatives of the constructors and the specialists subcontractors. The parameters raised will evidence which are the better ways of leading such meetings, in the diverse stages of production, in accordance with the constructive culture and with the technological resources of the company.
Apoio computacional para auxiliar a reengenharia de sistemas legados Java para AspectJ
(Universidade Federal de São Carlos, 2007-08-24)
Kawakami, Daniel
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Penteado, Rosângela Aparecida Dellosso
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https://lattes.cnpq.br/4061946080136286
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https://lattes.cnpq.br/2581762744107479
Guidelines that conduce the reengineering from legacy systems implemented in Java language to Aspect-Oriented language, AspectJ, preserving the original functionality, was proposed in the Aspecting method. Some case studies based on Aspecting was performed and it inferred that the reduction of efforts could be observed if computational support had been created previously and used. The List of Indications (of aspects) originally specified in Aspecting used lexical analysis for identification of crosscutting concerns found in Java code. Therefore, an Indication Model was presented in this paper in order to perform identification of crosscutting concerns in legacy code by syntactic analysis, using AST (Abstract Syntax Tree) and reorganization of Java code to AspectJ. The resulting system has enhancements in its internal structure, due to the separation of crosscutting concerns and elimination of problems related to scattering and tangling of code, observing better modularization, legibility and maintenance of system. A computational support that automates some of guidelines of system reengineering makes this migration process possible. Thus computational support called ReJAsp (apoio computacional para Reengenharia de sistemas Java para AspectJ) was built as plug-in of Integrated Development Environment Eclipse. The evaluation of ReJAsp was performed as case studies using systems written in Java, one of them found at Internet and others developed by students of computer science course of UFSCar.
Escalonamento de aplicações paralelas: de clusters para grids
(Universidade Federal de São Carlos, 2007-08-24)
Jacinto, Daniele Santini
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Guardia, Hélio Crestana
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https://lattes.cnpq.br/1780902767520967
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https://lattes.cnpq.br/4978298159144069
Different algorithms provide efficient scheduling of parallel applications on distributed and heterogeneous computational platforms, such as computational grids. Most scheduling algorithms for such environments require an application model represented by a directed acyclic graph (DAG), selecting tasks for execution according to their processing and communication characteristics. The obtainment of DAGs for real applications, however, is not a simple quest. The required knowledge about the application tasks and the communication among them, considering existing transmission cycles, harden the elaboration of appropriate graphs. Particularly, MPI programs, that represent a meaningful portion of existing parallel applications, usually present a cyclic communication model among the master and the processing nodes. This behavior prevents most scheduling algorithms to be employed as they recursively traverse the graphs to prioritize the tasks. In this sense, this work presents a mechanism for the automatic creation of DAGs for real MPI application originally developed for homogeneous clusters. In order to do so, applications go through a monitored execution in a cluster and the collected data are used for the elaboration of an appropriate DAGs. Data dependencies are identified and existing cycles among the tasks are eliminated. The HEFT scheduling algorithm is used to evaluate the application model and the schedule obtained is then automatically converted into an RSL (Resource Specification Language) file for execution in a grid with Globus. Results from running real applications and simulations show using the grid can be advantageous.
Estabilidade em edifícios de concreto armado com pavimentos em lajes planas
(Universidade Federal de São Carlos, 2007-08-24)
Cicolin, Luiz Antonio Betin
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Figueiredo Filho, Jasson Rodrigues de
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https://lattes.cnpq.br/0732866094426766
This present work covers possible manners of evaluating steel concrete frames designed for multiple flooring buildings as far as instability and necessity of second order efforts are concerned. Starting from single floor projects with simple flat slab frame, models with different numbers of floors are considered. The models do not use large rigidity elements such as staircases and lift shafts. The modeling used in this piece adopts simplified criteria for vertical action dimensioning, forming frames with flat slab layers taken as low height beams. These models are evaluated. Based on the results, the work analyzes the application validity of criteria to dismiss consideration of the NBR6118:2003 code presented second order global effort, and compares this against the P-∆ process utilization. Results both with and without inverted beams at the periphery are compared.
Desenvolvimento de eletrodo modificado com filme de poli(1-aminoantraceno) para determinação de dopamina em formulação farmacêutica
(Universidade Federal de São Carlos, 2007-08-24)
Troiani, Estela de Pieri
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Faria, Ronaldo Censi
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https://lattes.cnpq.br/8659496864305621
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https://lattes.cnpq.br/9076749540281154
The aim of this work was to study the electrochemical response of the electrode modified with poly(1-aminoanthracene) (PAA) for dopamine (DA) determination by means of cyclic voltammetry and differential pulse voltammetry measurements. The PAA were electropolymerized on platinum electrodes and conducting glass ITO, by cyclic voltammetry in a solution of 0.01 mol L-1 1- aminoanthracene and 0.1 mol L-1 tetrabutylammonium perchlorate (TBAP) or 0.1 mol L-1 lithium perchlorate (LiClO4) in acetonitrile medium, being that the best results for DA determination was obtained with Pt/PAA electrode prepared with TBAP. The parameters applied in differential pulse voltammetry were a = 0.1 V, Ei = 0.002 V and ν = 0.002 V s-1. The solution used for DA determination was phosphate buffer solution pH 6.0. The method was applied to determine DA. The system showed a good response for DA when a conditional potential of -0.7 V was applying for 3 s before the cyclic voltammetry. With this pre-treatment the PAA electrode presented a permselective response for DA with no interference of ascorbic acid (AA). The system was available for DA determination by means of differential pulse voltammetry and detection and quantification limits of 4.64 μmol L-1 and 15.4 μmol L-1, respectively, were obtained. A recovery of 99.7-104% was found. The precision of the method was checked by performing ten successive measurements of a 5.0x10-4 mol L-1 DA solution and a relative standard deviation (RSD) of 1.2% were achieved. The analysis of the morphology of PAA film by SEM and FEG showed a flat structure indicating a compact and smooth film. By AFM the film morphology presented small spherical structures with maximum height of about 18 nm indicating that the film is nanostructured. The electrode stored dry presented biggest life-time and better analytical response. In the present study, the PAA electrode showed as a very interesting system for DA determination in pharmaceutical formulation with no interference of AA.
Educação de jovens e adultos : palavras de mulheres a respeito do processo de escolarização.
(Universidade Federal de São Carlos, 2007-08-27)
Manzato, Carolina Rodrigues
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Reyes, Cláudia Raimundo
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https://lattes.cnpq.br/2522868599367468
The study approached some women s reintegration to the school environment, students from the Municipal Program of Youngsters and Adults Education in São José do Rio Preto, with the aim of understanding their reasons and objectives in the process. In order to do so, the following goals were established: comprehending their first school experiences to identify the factors responsible for the interruption (or privation) of their learning process, and the implications of these factors in the women s comming back to school; understanding the reasons why women with little or no education look for the school environment; identifying the kinds of learning offered by the school and investigating if they had implications in these women s practical lives; discovering if the women are satisfied (in case their lives have been changed by the learning process) and if they noticed the changes or not. This research s main questions: the education of youngsters and adults EJA, initial reading instructions and critical education, and the role destined to women throughout history, were accompanied by theoretical support of authors such as Paulo Freire, Sérgio Haddad, Maria Clara Di Pierro, Ana Maria Freire, Henry Giroux, Cláudia Viana, Joan Scot, among others. Data collection was carried out by means of semi-structured interviews with six learners, 41-58 years old. Data analysis was based upon Paulo Freire s theory, including the categories of oppression, marginalization, conscientiousness, autonomy, among others. We can previously and primarily stand out these women s courage, they still fight to restore rights that have been historically taken from them.
Educação física, educação ambiental e educação infantil no contexto escolar : uma sinergia possível
(Universidade Federal de São Carlos, 2007-08-27)
Rodrigues, Cae
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Freitas, Denise de
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https://lattes.cnpq.br/6159440346233422
The pursuit for synergies between physical education and environmental education in elementary education stems from two main characteristics of contemporary life, namely the environmental crisis on the one hand, and the valorization of body culture, human movement, and ludic experiences in children development, on the other hand. The contemporary environmental crisis is substantiated by a disintegrated relationship between society and nature, precipitated by a fragmented awareness of the world that privileges human values and desires over nature. Once ensuing from this simplistic world view, that disregards a wealth of potential learning relationships, conventional environmental education has usually been uncritical and conservative. In order to meet a relentless human quest for a more meaningful societal life, for being-ones-with-the-others , for being more , a new education must be sought, one that comes to contend the bases of conservatism, a challenging education, set on liberty and aimed at intervening to change. To consider an environmental education that underscores the principles of a democratic education presupposes working with contents that are significant to the student, stressing the relevance of experience, of attitudes and values - all genuine marks of Freire s pedagogy. In elementary education, focus of this study, significant apprenticeship is proposed to be based on essential elements present in children s universe, such as movement, ludic experiences and the development of body culture. All these elements are present in the contents and pedagogic objectives of physical education. Hence, it is possible to define as objectives of this study: (i) to ascertain and ascribe the effective role of physical education in elementary education, (ii) seeking to promote children s environmental awareness. This research, which applies a typically qualitative approach, was carried out on the basis of a critical bibliographical review on the philosophical, pedagogical and methodological knowledge about the synergies between physical education and environmental education, emphasizing the potentialities of their relationships as concepts for understanding and proposing improved approaches regarding the building up of environmental awareness in childhood.
Realidade psíquica e inconsciente em Freud e em Bérgson : considerações a partir de uma filosofia da ação
(Universidade Federal de São Carlos, 2007-08-27)
Cossu Junior, Franco
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Simanke, Richard Theisen
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https://lattes.cnpq.br/5431145327759147
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https://lattes.cnpq.br/8871513367560163
Although both the Bergsonian philosophy and the Freudian metapsychology have been not properly considered, in the last decades, regarding an ample debate about the nature of the mind, it is about two recent speeches that might contribute significantly to the new theoretical-practical outlines in the contemporary philosophy and sciences that examine the mind. Both thoughts show the unconscious as something without what the psychic events could not be understood entirely, which demands total attention of any future scientific paradigm that intends to establish itself over the psychic phenomena. The key to this enterprise we find in the concept of Action, openly in Bergson, but also clearly in Freud who never withheld himself to understand the human in their constant relationship to the world around. It is not about the fusion of two speeches in the name of a new psychoanalysis , which inevitably might cause several epistemologic problems, but, chiefly, about the possibility to verify how much we can learn with the thesis about the mind that emerge from the both theories.
Perovskitas La1-xSrxMnO3, suportadas em alumina e zircônia, aplicadas à combustão do metano
(Universidade Federal de São Carlos, 2007-08-28)
Santos, Lidiane Faria
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Assaf, José Mansur
;
https://lattes.cnpq.br/9563312407691130
;
https://lattes.cnpq.br/6141017395528482
The total oxidation of the methane is an important environmental and industrial reaction, mainly because it is extensively used in energy production and in the control of gases emission to the atmosphere. With catalysts, the methane combustion is available at lower temperatures, thus decreasing the emission of NOx, a gas of green house harmful to human health. Perovskite-type oxides of the series La1-xSrxMnO3 (x = 0, 0,3 e 0,5) supported on γ-Al2O3 and ZrO2 were prepared and characterized for application in methane oxidation. The samples were prepared by co-precipitation and depositionprecipitation methods, using aqueous solutions of metals nitrates and urea as precipitant agent. Each catalysts were calcined in two steps: first at 600 ºC for 5 hours and later in one of these conditions: 700 ºC/10 h, 800 ºC/10 h or 900 ºC/10 h. Chemical analysis, X-Ray Diffraction (XRD), Specific Surface Area (BET), Temperature Programmed Reduction (TPR) and Scanning Electron Microscopy (SEM) were applied to characterize the samples. The XRD spectra showed that the crystalline structures of the unsupported La1-xSrxMnO3 perovskite were best defined with the increase of the calcination temperature. On the other hand, in the supported samples the complete visualization of the XRD spectra was difficult, being the perovskite structure just confirmed by the presence of its more intense peak. As La3+ and Sr2+ do not reduce at the experimental conditions applied in this work, all the peaks showed in TPR analysis corresponding to reduction of the species Mnn+. The influence of the calcination temperature can also be observed in the variation of the specific surface area of the catalysts. The catalytic essays showed that the compounds are actives at relatively low temperature. The supported catalysts presented higher activity than the unsupported ones and the calcined at lower temperature showed more satisfactory catalytic activities. The substitution of La by Sr increased significantly the catalytic activity of the studied systems
Procedimentos para o processo de planejamento da construção : estudo de caso, São Carlos, Estado de São Paulo.
(Universidade Federal de São Carlos, 2007-08-28)
Moraes, Rosa Maria de Mattos
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Serra, Sheyla Mara Baptista
;
https://lattes.cnpq.br/8528385567782505
The competitiveness at the civil construction companies segment depends on the management efficient of its planning and execution control systems. The construction planning through more efficient models it's leaving of being an ideal to be a reality in some companies, as a strategy for quality improvement of its products and the competitiveness increase in their market. This research is focused on the building planning system improvement, with emphasis in building programming and control, through the use of computational tools, aiming, in special, the segment of multi-story buildings. The objective is to present systematic and usual procedures in the planning process of the construction. The implementation of the planning process is demonstrated through a case study, which considers since the stage of building program conception up to the execution control, performed through the building follow-up. The result of this research is the presentation of an easily implemented planning process for the segment of multi-story building companies, which generate quick information to support decisions.