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Ciências Exatas e da Terra.

Moscati, Giorgio; Lerner, Eugênio
Fonte: CNPq/Coordenação Editorial; Brasília Publicador: CNPq/Coordenação Editorial; Brasília
Tipo: Parte de Livro
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O III PBDCT foi elaborado como um roteiro para a atuação do governo na área de ciência e tecnologia para o período de 80/85 e representa o detalhamento do capítulo IV do III PND. Dentro desse enquadramento, é feita a seleção de programas e atividades prioritárias, cuja implementação se consubstancia através de Ações Programadas em Ciência e Tecnologia, sob a coordenação do CNPq e com a participação dos setores interessados. O documento de Avaliação & Perspectivas das diversas subáreas se constitue em trabalho critico e comparativo entre o que propõe o PBDCT e o resultado das Ações Programadas, além de fornecer os elementos para as correções e para a definição dos novos rumos a serem seguidos. Este documento é composto da Avaliação e Perspectivas nas seguintes subáreas: Astronomia, Computação, Estatística, Física, Geociências, Matemática, Oceanografia e Química. Os redatores das subáreas foram convidados seguindo-se indicação dos respectivos Comitês Assessores, ficando assim constituída a equipe responsável pelo documento na Área de Ciências Exatas e da Terra: Professor Eugênio Lerner (coordenador) Astronomia - professor Edemundo da Rocha Vieira (UFRGS) Computação- professor Ysmar Viana e Silva Filho (UFRJ) Estatística- professor Djalma Galvão Carneiro Pessoa (IMPA) Física- professor Roberto Leal Lobo e Silva (CBPF) Geociências - professor Irajá Damiani Pinto (UFRGS) Matemática - professor Carlos Augusto Isnard (IMPA) Oceanografia - professor Clovis Teixeira (USP) Química- professor Walter Baptista Mors (UFRJ) Aos redatores foram dados meios para convidarem um certo número de pessoas da comunidade que os pudessem assessorar nos diversos setores de suas subáreas. Na preparação dos documentos os redatores se valeram...

Introdução às Ciências Exatas e da Terra.

Moscati, Giorgio
Fonte: CNPq; Brasília Publicador: CNPq; Brasília
Tipo: Parte de Livro
POR
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O III PBDCT foi elaborado como um roteiro para a atuação do governo na área de ciência e tecnologia para o período de 80/85 e representa o detalhamento do capítulo IV do III PND. Dentro desse enquadramento, é feita a seleção de programas e atividades prioritárias, cuja implementação se consubstancia através de Ações Programadas em Ciência e Tecnologia, sob a coordenação do CNPq e com a participação dos setores interessados. O documento de Avaliação & Perspectivas das diversas subáreas se constitui em trabalho crítico e comparativo entre o que propõe o PBDCT e o resultado das Ações Programadas, além de fornecer os elementos para as correções e para a definição dos novos rumos a serem seguidos. Este documento é composto da Avaliação e Perspectivas nas seguintes subáreas: Astronomia, Computação, Estatística, Física, Geociências, Matemática, Oceanografia e Química. Os redatores das subáreas foram convidados seguindo-se indicação dos respectivos Comitês Assessores, ficando assim constituída a equipe responsável pelo documento na Área de Ciências Exatas e da Terra: Professor Eugênio Lerner - Coordenador (UFRJ) Astronomia - professor Edemundo da Rocha Vieira (UFRGS) Computação - professor Ysmar Vianna e Silva Filho (UFRJ) Estatística - professor Djalma Galvão Carneiro Pessoa (IMPA) Física - professor Roberto Leal Lobo e Silva Filho (CBPF) Geociências- professor Irajá Damiani Pinto (UFRGS) Matemática- professor Carlos Augusto lsnard (IMPA) Oceanografia - professor Clovis Teixeira ( USP) Química- professor Walter Baptist Mors (UFRJ) Aos redatores foram dados meios para convidarem um certo número de pessoas da comunidade que os pudessem assessorar nos diversos setores de suas subáreas. Na preparação dos documentos os redatores se valeram...

Arquitetura e implementação de mecanismos para suporte a regras de negócio em sistemas de informação; Architecture and implementation of mechanisms to support business rules in information systems

BOFF, Glauber
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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The development of Information Systems (IS) should be performed so that changes in the client s business, which may be common, may be reflected in the system, without reducing its consistency and reliability. To achieve these features, portability and maintainability, which are challenges for Software Engineering, are very important. There are two essential requirements which, when present in the development process, make it easier to deal with the system complexity. The first requirement states that it should be possible to describe the IS business rules (BR) using a high level language, generating a single, implementation independent model. The second requirement demands that it should be possible to generate software source code from the abstract BR model, and to integrate this code to the IS. This work presents an approach to meet these requirements. This approach covers the specification, modeling, implementation and evaluation of business rules in software to facilitate the development and maintenance of complex IS. Instead of hard-coding the BR into the applications, this approach adopts OCL as a platform independent high-level language to define a single BR model for the IS. To store the rules safely throughout the IS life cycle...

Variações do método kNN e suas aplicações na classificação automática de textos; kNN Method Variations and its applications in Text Classification

SANTOS, Fernando Chagas
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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Most research on Automatic Text Categorization (ATC) seeks to improve the classifier performance (effective or efficient) responsible for automatically classifying a document d not yet rated. The k nearest neighbors (kNN) is simpler and it s one of automatic classification methods more effective as proposed. In this paper we proposed two kNN variations, Inverse kNN (kINN) and Symmetric kNN (kSNN) with the aim of improving the effectiveness of ACT. The kNN, kINN and kSNN methods were applied in Reuters, 20ng and Ohsumed collections and the results showed that kINN and kSNN methods were more effective than kNN method in Reuters and Ohsumed collections. kINN and kSNN methods were as effective as kNN method in 20NG collection. In addition, the performance achieved by kNN method is more stable than kINN and kSNN methods when the value k change. A parallel study was conducted to generate new features in documents from the similarity matrices resulting from the selection criteria for the best results obtained in kNN, kINN and kSNN methods. The SVM (considered a state of the art method) was applied in Reuters, 20NG and Ohsumed collections - before and after applying this approach to generate features in these documents and the results showed statistically significant gains for the original collection.; Grande parte das pesquisas relacionadas com a classificação automática de textos (CAT) tem procurado melhorar o desempenho (eficácia ou eficiência) do classificador responsável por classificar automaticamente um documento d...

Um estudo de técnicas da Inteligência Artificial aplicadas na distribuição de recursos em áreas geográficas; Resource Allocation in Geographical Areas

TELES, Ronneesley Moura
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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This paper studies a problem that is the distribution of resources in geographical areas. Many organizations, from taxis, to the military faces this problem in their daily operations. In essence, it tries to answer the question: What are the best places in which I place my assets in the geographic area X, according to a set of constraints Y? . To answer the question, we studied representation models of the problem, known techniques have been applied in Artificial Intelligence and Operations Research, such as: testing all combinations, greedy algorithms, heuristics and genetic algorithms. Algorithms were created and simulations were performed. Furthermore, Multiagent System was developed that implements one of algorithms developed. In evaluating the proposals made in this dissertation, it was considered the field of Electric Companies in the task of distributing vehicles in a city.; Este trabalho estuda um problema que consiste na distribuição de recursos em áreas geográficas. Muitas organizações, desde cooperativas de táxi até as forças armadas enfrentam este problema em suas operações diárias. Em essência, tenta-se responder a pergunta: Quais os melhores lugares em que devo posicionar meus recursos na área geográfica X...

Uma abordagem baseada em modelos para construção automática de interfaces de usuário para Sistemas de Informação; A model-based approach to user interfaces automatic building for information systems

COSTA, Sofia Larissa da
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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Building user interfaces for Information Systems (IS) involves modeling and coding appearance (presentation) and behavioral (interaction) aspects. This work presents a modelbased approach to building these interfaces using tools for automatic transformation of models and for interface code generation. The proposed approach applies the concept of Interface Stereotype, introduced in this work, which identifies, in a high level of abstraction, features of user interface (UI) appearance and behavior, independently of the underlying IS application. A taxonomy of interface elements is proposed as the basis for stereotype definition, along with a interface behavior specification mechanism, which allows expressing actions and restrictions on the stereotypes by precise, objective and independently from the interface implementation platform. It is also proposed a architecture for a software component which manages model-based user interfaces building. The architecture defines how this component can be integrated in IS development process. The approach for model-based user interface development proposed in this work brings benefits in effort and cost construction terms, facilitating the maintenance and the evolution of user interface of IS. Futhermore...

Modelagem e Especificação de um Middleware para Redes de Sensores Sem Fio Aplicado à Saúde; Modeling and Specification of a Wireless Sensor Network Middleware Intended for Health

NAMBA, Massahide de Oliveira
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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Solutions in healthcare are focused on diagnostics, productivity and personal care in this way, theWireless Sensor Networks WSN allow health professionals to monitor people more efficiently. To make integration between WSN and the applications and interfaces that health professionals use more effective its needed a software component that facilitates and mitigates the problems of developing these applications, this component is called middleware. From the perspective of software development, this middleware mainly offers the advantage of focusing the work on the requirements of the software, making the programmer not to worry about the characteristics of hardware and interconnection of devices in the WSN. In the way to facilitate the use of applications in healthcare, this middleware offers some features that are introduced to simplify and ensure the transmission of information in addition to providing reliable use of them. In this work we propose a middleware named Kratos that allows portability and concurrent execution of applications by standardized interfaces to mobile devices, allowing their use in sensor networks applied to health in a transparent way. To evaluate the use of Kratos and its functionality was proposed an application scenario for monitoring electrocardiographic signals (ECG)...

Desenvolvimento de um Sistema de Auxílio ao Diagnóstico de Pneumonia na Infância Utilizando Visão Computacional; Development of a System of Aid to the Diagnosis of Pneumonia in Children Using Computer Vision

MACEDO, Sanderson Oliveira de
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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This work aims to develop a system to aid in the diagnosis of pneumonia by computer, termed pneumocad, which aims to identify chest radiographies compatible with the disease. Techniques were used for the recognition of patterns in textures through the decomposition of the wavelet transforms of the features extracted from the decomposition and classification applied to radiography. We analyzed 166 images in digital radiography "gold standard", previously confirmed by two radiologists trained according to WHO guidelines as Pneumonia Present (PP = 83) and Pneumonia Absent (PA = 83). In both methods were investigated which feature best applies to the recognition of patterns and textures in which the best performance of the classifier K-NN method. The procedure began with the application of the Haar Wavelet Transform and the extraction of characteristics of each radiograph 17 that were stored descriptors. The methodology I tested the increase in classification accuracy, balanced with increasing the amount of radiographies of each class. The methodology II tested the ability of K-NN to generate ratings at acceptable levels with the unbalance of the random number of images between the two classes. There was obtained an average of accuracy of 91.75% with emphasis on the difference of characteristic variance performance and the K-NN was more effective when the number of nearest neighbors is K=9. The results are considered promising because the pneumocad can be a useful tool in the diagnosis of childhood pneumonia...

BOOKISH: Uma ferramenta para contextualização de documentos utilizando mineração de textos e expansão de consulta; BOOKISH: A tool for background documents using text mining and query expansion

SILVA, Luciana Oliveira e
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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The continuous development of technology and its dissemination in all domains have caused significant changes in society and in education. The new global society demands new skills and provides an opportunity to introduce new technologies into the educational process, improving traditional education systems. The focus should be on the search for information, significant research, and on the development of projects, rather than on the pure transmission of content. When delivering a lecture about a given content, teachers often provide additional sources that will help students deepen their understanding of the subject and carry out activities. Furthermore, it is desirable to have proactive students, capable of interpreting and identifying other sources of information that complement and expand the subject being studied. However, one of the challenges today is information overload - there are many documents available and few effective ways to treat them. Every day, large numbers of documents are stored and made available. These documents contain a lot of relevant information. However finding that knowledge is a difficult task. The BOOKISH system, proposed in this work, assists students in their search activity. Analyzing PowerPoint slide presentations...

Melhoria de processos de tecnologia da informação multi-modelo; Multi-model information techonology process im-provement

MENDES, Fabiana Freitas
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciência da Computação; Ciências Exatas e da Terra - Ciências da Computação
Tipo: Dissertação Formato: application/pdf
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To use just one quality model in a Information Technology Process Improvement (ITPI) iniciative means just one: language, thought about how to fit organization needs, and way to conduct improvements and appraisals. Despite, to use just one model also means it could exist other ways to deal with ITIPI needs, but this is not going to be considered. To use more than one model, hence, means to model a best solution. Mono-Model ITPI initiatives have similar nature if compared with multi-model initiatives. However, there are multi-model specific challenges like: integration of improvement initiatives, of appraisals, and of quality model. Despite of being possible to model better solutions through multi model ITPI, there are little works about it. This research review works related to this subject, presents challenges multi-model list, and comes up with an approach to deal with these challenges. This approach has the advantage to be independent of the conduct method of improvement, quality model or project improvement phase.; Utilizar um único modelo de qualidade em uma iniciativa de Melhoria de Processos de TI (MPTI) em uma organização significa também única: linguagem, maneira de pensar sobre como atender as necessidades de MPTI, e maneira de conduzir as melhorias e as avaliações. Apesar disso...

A atividade pedagógica do professor de Matemática no PROEJA; The pedagogical activity of the Mathematics teacher at the PROEJA.

JACINTO, Everton Lacerda
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Educação em Ciências e Matemática; Ciências Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Educação em Ciências e Matemática; Ciências Exatas e da Terra
Tipo: Dissertação Formato: application/pdf
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This thesis shall discuss the existent relation between the pedagogical actions of mathematics teachers and the necessities and the specifics of apprenticeship of young students and adult workers. The starting point consists in a field investigation realized at the IFG, a campus of Goiania, with a mathematics teacher of the technical course of alimentation services of PROEJA. For this, the methodology of the field investigation has to be qualitative. The adopted instruments of the date collection have been questionnaire, semi-structured interviews, direct observation, field-diaries and registries of the classes in video. The theoretic fundament is based on principle works of cultural-historical psychology students and on the activity theory (Vigotski, Leontiev, Davidov and others). The analyzing process of the dates is organized in three categories: "The purpose of pedagogical work", "The organization of pedagogical activity", and "the actions in pedagogical activities". The first category analyzes the professional trajectory of the teacher, focussing the conceptions of mathematics knowledge, the process of teaching and apprenticeship of mathematics and the principal motive of his pedagogical activity. The second category treats the form how the professional organizes the activities of teaching...

O blog nas aulas de Matemática: um instrumento capaz de contribuir para que o aluno elabore e reelabore suas compreensões sobre seu conhecimento matemático?; The blog in mathematics lessons: a tool to help the student prepare and redefined their understanding of their mathematical knowledge?

LUCAS, Marcello
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Educação em Ciências e Matemática; Ciências Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Educação em Ciências e Matemática; Ciências Exatas e da Terra
Tipo: Dissertação Formato: application/pdf
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Will Blog in Math classes be an instrument that can contribute to students elaboration and reelaboration of their understanding of Math knowledge? Starting from this question, this paper investigates the use of blog as a methodology resource to Math teaching in High School. It tries to understand and points to the viability or not of the use of Blog to contribute to the learning of Math and to the development of other necessary abilities to the learning of the subject as well as to life in society. The ability to read and write, for example. The research uses the phenomenological investigation. The data consisted of descriptions of the discussions held during the process of content production to be published on Blog. Convergencies were sought, in those descriptions, to make it possible to put in evidence the phenomenon searched without worrying to find generalizations, but the explicitation of the understanding of Math knowledge demonstrated by the subjects of the research through the produced material to be published on Blog in a certain time and context. Math classes whose validity will only be efficient through the active, persistent and persistent teacher performance as a member of the Blog. The teacher s characteristics of attentiveness and intentionality will help to motivate...

Impressões e ações de professores que visitaram o centro regional de ciências nucleares do Centro-Oeste: duas décadas do acidente com o Césio-137 em Goiânia; Impressions and actions of teachers who visited centro regional de ciências nucleares do Centro-Oeste: two decades of the accident with Cesium-137 in Goiânia

GRASSI, Giovanni
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Educação em Ciências e Matemática; Ciências Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Educação em Ciências e Matemática; Ciências Exatas e da Terra
Tipo: Dissertação Formato: application/pdf
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The objective of this study was to analyze contextually how impressions of visitors to the Information Center of the Regional Center of Nuclear Sciences of the Midwest (CI-CRCN-CO) in the anniversary month of twenty years of the accident with the Cesium-137 in Goiânia, September 2007, in others words, qualitatively analyze the actions of popular science pursued for this space non-formal education. Using some of the theoretical references, we discuss the formal and non-formal, communication and popularization of science and functions of museums and science centers to analyze the activities of an institution which, besides carrying out research and make the monitoring of environment near the deposits where the garbage generated by the accident with cesium-137, is visited in order to inform the population about the episode occurred in September 1987. The data collected through documentary analysis and semi-structured interviews allowed a qualitative analysis taking into account the cultural, political, social and academic actions performed by the Information Center CRCN-CO. Respondents consider that the aforementioned institution is helping to expand scientific knowledge of the population, raising the critical sense of scientific production and generating developments of its activities in schools that visit.; O objetivo deste estudo foi analisar de maneira contextualizada as impressões dos visitantes ao Centro de Informações do Centro Regional de Ciências Nucleares do Centro-Oeste (CI-CRCN-CO)...

Efeitos da correlação eletrônica sobre as polarizabilidades longitudinais do polidifluoroacetileno; Effects of electron correlation on the polarizabilities longitudinal polidifluoroacetileno

TORRES, Elber Magalhães
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Física; Ciências Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Física; Ciências Exatas e da Terra
Tipo: Dissertação Formato: application/pdf
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This work presents ab initio results, including correlation corrections, for the static longitudinal linear polarizability, ®L, and longitudinal second hyperpolarizability, °L, of planar and twisted fluorinated polyacetylene (polyacetylene) chains. These electric properties were calculated by the finite field (FF) method and the correlated energies were obtained by means of the second order MÁller-Plesset perturbation theory (MP2). Our MP2 calculations were performed using the 6-31G basis set, although the geometry optimization involved both, the 6-31G and 6-31G(d) basis sets. Our results show that the incorporation the electron of correlation effects in the calculations of the polarizabilities, specially the hyperpolarizabilities, is essencial in order to obtain reliable estimates of these properties. Our estimates also demonstrate that the substitution of the H atoms in polyacetylene by F atoms, a procedure that gives rise to polydifluoroacetylene (PDFA), has the effect of incrasing the non-linear response of this material.; Neste trabalho apresentamos resultados ab initio, incluindo a correlação eletrônica, para a polarizabilidade linear longitudinal, ®L, e segunda hiperpolarizabilidade longitudinal, °L, de cadeias planares e helicoidais de poliacetileno fluoretadas (polidifluoroacetileno). Estas propriedades elétricas foram calculadas por meio do campo finito (FF) e as energias correlacionadas foram obtidas por meio da teoria de perturbação de MÁller-Plesset de segunda ordem (MP2). Nossos cálculos MP2 foram feitos usando o conjunto base 6-31G...

Desenvolvimento do Software PlanEx de planejamento de experimentos online e sua aplicação didática na pós-Graduação; PlanEx a Web/Online Software for Design of Experiments: Development, and Evaluation in Graduate Chemistry Course

BÔSSO, Antônio Rafael de Souza Alves
Fonte: Universidade Federal de Goiás; BR; UFG; Doutorado em Quimica; Ciencias Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Doutorado em Quimica; Ciencias Exatas e da Terra
Tipo: Tese de Doutorado Formato: application/pdf
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This work describes the design of experiments and response surface methodology (RSM) via factorial designs programmed in PlanEx, a new web/online software implemented using the Java language. The goal was to develop and validate PlanEx as a simple, efficient, and an interactive tool for undergraduate teaching and research. PlanEx was also designed as a free software, and the Java language was chosen since it is a community-developed open source software. PlanEx provides both full factorial design of experiments (2k) and fractional (2k-1), with up to six variables, and with, or without, replicates. PlanEx was also developed to perform variable screening through replicates, and normal probability plots and also to evaluate the model bias by the residual graphs. PlanEx is based on RSM with up to four variables at three levels, and central points with, or without, replicates. Through RSM the user can check linear or quadratic models to predict experimental responses through 3D surface plots, and analysis of variance (ANOVA). PlanEx was also evaluated in the second term of 2009, 2010, and 2011 in graduate courses of planning and design of experiments. The results have shown that PlanEx is fast, and interactive, and it is a simple design of experiment tool for both teaching and research.; Esta Tese apresenta o software PlanEx que contém as ferramentas do planejamento de experimentos fatorial escritas em linguagem de programação Java. O objetivo do trabalho foi desenvolver o software PlanEx e validá-lo como uma ferramenta de ensino e pesquisa simples...

Variabilidade química dos óleos essenciais e do teor de fenóis em folhas e frutos da jabuticabeira (Myrciaria cauliflora); Chemical variability of essential oils and phenol content in leaves and fruits of jabuticabeira (Myrciaria cauliflora)

DUARTE, Alessandra Rodrigues
Fonte: Universidade Federal de Goiás; BR; UFG; Doutorado em Quimica; Ciencias Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Doutorado em Quimica; Ciencias Exatas e da Terra
Tipo: Tese de Doutorado Formato: application/pdf
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Foliar contents of total phenols and tannins and the essential oil composition of Myrciaria cauliflora populations cultivated in six sampling sites have shown the presence of four clusters related to soil types and foliar nutrients. Cluster I included samples which originated from sandy soil (S1) with the highest and lowest percentages of γ-eudesmol (11.55%) and germacrene D (20.48%), respectively, as well as high total phenol (136.68 mg/g) and tannin (60.72 mg/g) contents. Cluster II, rich in elemol (4.61%), included all the samples cultivated from clay sand loam soils (S2, S3, and S6), whereas clay soils S4 (cluster III) and S5 (cluster IV) had the highest amounts of germacrene D (III: 27.20%; IV: 26.83%) and the lowest levels of elemol (2.12%; 2.55%), total phenols (79.69 and 111.77 mg/g), and tannins (34.04 and 44.51 mg/g). Canonical redundancy analysis (RDA) revealed the relationship between chemical balances in the soil and leaf nutrients in different clusters. Chemovariations may be environmentally determined. Additionally, essential oil chemical composition and phenolics (total phenols, tannins, anthocyanins), reducing sugar and fruit acidity contents of Myrciaria cauliflora were obtained from same cultivated populations. RDA and discriminant analyses revealed four clusters of samples based on contents of α-copaene...

Superfícies Mínimas em H3 e H2 x R; Minimal surfaces in H3 and H2 x R

RUYS, Wesley da Silva
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Matemática; Ciências Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Matemática; Ciências Exatas e da Terra
Tipo: Dissertação Formato: application/pdf
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In this work we study some results from the article of Mercuri, F., Piu, P., Montaldo, S; Weierstrass Representation Formula for Minimal Surfaces in H3 and H2 x R. Therefore, we do a study of the minimal surfaces simply connected in three-dimensional Riemaniann manifold. Furthermore, searching for to determine the necessary conditions to find minimal surfaces in these spaces. Moreover, to give examples of the surfaces in the three-dimensional Heisenberg group and in the product of the hyperbolic with the real line.; Neste trabalho estudamos alguns resultados do artigo de Mercuri, F., Piu, Stefano Montaldo P, Weierstrass Representation Formula for Minimal Surfaces in H3 and H2 x R. Consequentemente fazemos um estudo de superfícies mínimas simplesmente conexas em variedades Riemaniannas tridimensionais, buscando determinar as condições necessárias para encontrar superfícies mínimas nestes espaços. Alem disso, dar exemplos dessas superfícies no grupo tridimensional de Heisenberg e no produto do plano hiperbólico com a reta real.

Limitantes para Códigos de Peso Constante; Bounds for Constant-Weight Codes

RODRIGUES, Silvana da Silva
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Matemática; Ciências Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Matemática; Ciências Exatas e da Terra
Tipo: Dissertação Formato: application/pdf
POR
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155.85%
The main purpose of this dissertation was to construct lower and upper bounds for the cardinality of the error correcting codes for constant-weight, contained in the vector space Fn 3 , where F3 is a field with three elements, knowing parameters such as length and minimum distance code. We present the main results of linear algebra necessary to develop the theory of codes and then the fundamental concepts of more practical class of codes, the linear error correcting codes. We state the Totobola problem and the Football problem, relating them to the theory of codes and present some bounds for the "covering radius problem"for r = 1 , some values of n. In the last chapter, we conclude the work with some examples that illustrate bounds of coverings for Fn 3 , with r = 2 and 3, and the generalization of the problem, where we present the binary covering radius problem, the case of multiple coverages and the extension of the idea, citing bounds for the cardinality of the codes contained in the vector space over a finite field with any arbitrary number of elements.; O principal objetivo desta dissertação foi construir limitantes inferiores e superiores para o número de elementos de um código corretor de erros de peso constante, contido no espaço vetorial Fn 3 ...

Existência e multiplicidade de soluções de problemas de contorno elípticos de quarta ordem via métodos topológicos; Existence and multiplicity of solutions to elliptic boundary value problems by topological methods

SILVA, Kaye Oliveira da
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Matemática; Ciências Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Matemática; Ciências Exatas e da Terra
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
155.81%
In this work, we employ topological methods in order to study existence and multiplicity of solutions, of nonlinear boundary value problems of the fourth order. More precisely, we make use of results on connected components of fixed points, as well as global bifurcation, to show existence and multiplicity of weak solutions of Partial Differential Equations, involving the Biharmonic operator under Navier boundary conditions. Proofs of the abstract results used, are presented in detail.; Neste trabalho, utilizamos métodos topológicos para estudar existência e multiplicidade de soluções de Problemas de Contorno Elípticos Não Lineares de 4a ordem. Mais precisamente, utilizamos resultados sobre componentes conexas de pontos fixos e tambem bifurcação global, para provar existência e multiplicidade de soluções fracas de Equações Diferenciais Parciais, envolvendo o Operador Binarmônico, sob condições de fronteira de Navier. As demonstrações dos resultados abstratos que utilizamos, são apresentadas em detalhes.

Os Projetos Pedagógicos de Cursos de Licenciatura em Química no Estado de Goiás: do Conhecer ao Construir; Projects Pedagogic Course in Chemistry in the State of Goiás: the Building of Knowledge

MESQUITA, Nyuara Araújo da Silva
Fonte: Universidade Federal de Goiás; BR; UFG; Doutorado em Quimica; Ciencias Exatas e da Terra Publicador: Universidade Federal de Goiás; BR; UFG; Doutorado em Quimica; Ciencias Exatas e da Terra
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
155.82%
With the development of this research we seek to investigate the relationships and interactions between constituent elements of the pedagogical courses projects (PPC) of Chemistry Teachers Training Courses in the Goiás state, Brazil. We used as a research method discursive textual analysis aimed at fragmenting documents examined in units of analysis, relations between units in the categorization process and build a new text that presents the new understandings of the phenomenon studied. We question whether, in the documents, the relationships and interactions established enable or provide a training that includes the current guidelines for teacher training. Identified positivist conceptions about the vision of science, lack of clarity regarding the professional profile to be formed and found the identity crisis of the university when you try to justify their actions relating to the needs of the labor market. We analyze the contradictions in relation to issues of interdisciplinarity, training by research and through use of information technology and communication.We study in detail the PPC in Chemistry Teachers Training Courses, re-designed our views and we give as a subject/researcher/teacher in a process of continuing education teacher's own trainer. This change enabled us to participate in the drafting of a new PPC seeking help to produce a document that had minimized the contradictions perceived by us on other PPC. We therefore propose that the conscious participation in the construction and preparation of PPC requires the understanding of the intentions of which are governed these documents constituted as drivers of the paths chosen for the implementation of the pedagogical and identity of a stroke; Com o desenvolvimento desta pesquisa buscamos investigar as relações e interações entre os elementos constituintes dos projetos pedagógicos de cursos (PPC) de Licenciatura em Química no estado de Goiás. Utilizamos como método de pesquisa a análise textual discursiva que visa fragmentar os documentos analisados em unidades de análise...