Correspondence between the one-loop three-point vertex and the Y and Delta electric resistor networks

Different mathematical methods have been applied to obtain the analytic result for the massless triangle Feynman diagram yielding a sum of four linearly independent (LI) hypergeometric functions of two variables F-4. This result is not physically acceptable when it is embedded in higher loops, because all four hypergeometric functions in the triangle result have the same region of convergence and further integration means going outside those regions of convergence. We could go outside those regions by using the well-known analytic continuation formulas obeyed by the F-4, but there are at least two ways we can do this. Which is the correct one? Whichever continuation one uses, it reduces a number of F-4 from four to three. This reduction in the number of hypergeometric functions can be understood by taking into account the fundamental physical constraint imposed by the conservation of momenta flowing along the three legs of the diagram. With this, the number of overall LI functions that enter the most general solution must reduce accordingly. It remains to determine which set of three LI solutions needs to be taken. To determine the exact structure and content of the analytic solution for the three-point function that can be embedded in higher loops, we use the analogy that exists between Feynman diagrams and electric circuit networks, in which the electric current flowing in the network plays the role of the momentum flowing in the lines of a Feynman diagram. This analogy is employed to define exactly which three out of the four hypergeometric functions are relevant to the analytic solution for the Feynman diagram. The analogy is built based on the equivalence between electric resistance circuit networks of types Y and Delta in which flows a conserved current. The equivalence is established via the theorem of minimum energy dissipation within circuits having these structures.

Semiótica do discurso científico: um estudo sobre novas perspectivas para a análise documental de conteúdo

Greimas Semiotic offers procedures for the analysis of different types of texts and discourses. For this reason, this study aimed to analyze the production of sense from scientific discourse, explained by Greimas Semiotics and Generative Sense Course, seeking to develop a new perspective on the identification of aboutness in Documentary Content Analysis and Information Science. The method used was exploratory and bibliographic review. Results show that the analysis of scientific discourse contributes to the identification of aboutness in Documentary Content Analysis, using Greimas Semiotics and Generative Sense Course.

Indícios da presença de fundamentos semióticos na literatura da Ciência da Informação

The interfaces between Semiotics of Information Science must also be analysed from a broader perspective, searching for signs of interdisciplinary involvement. So, as a complement to a theoretical study on the semiotic foundations of document analysis and information mediation, we undertook the analysis of the presence of semiotic perspectives in the Information Science literature —journals papers, conference proceedings and theses. The results showed that the semiotic studies related to the information analysis and information mediation are in an incipient stage, especially in Brazil, in spite of a substantial increase in the number of publications.

Manuais Didáticos e literatura infantil: as leituras infantis no Brasil e em Portugal

The school textbook is an important pedagogic resource in the classroom, and it is frequently the only one. But, an analysis of the Maternal Language’s textbooks in Brazil and in Portugal allowed us to detect serious didactic obstacles to the learning of the language in its semiotic omnifuncionality. In this paper we are going to present the results of a project that involves the presence of a children’s literature book in the classroom instead of the textbook adaptations. We developed activities before, during and after the reading in a fourth grade class of an Elementary School in Brazil and Portugal having the aim of build readers.

Sobre o pensamento de Peirce e a organização da informação e do conhecimento

Incomplete glimpses of the philosophy of Charles Peirce (1839-1914) can frequently be found in studies about Semiotics and Information Science. Therefore, we sought to discover the theoretical and applied interrelationships between knowledge and information organization and Peirce's Semiotics and Philosophy. The aim was to discover and evaluate the contributions of Peirce's Semiotics and Philosophy to the knowledge and information organization field. The method of this study was bibliographical research. The main results were: indexing process semiotic model, semiotic knowledge organization, interaction between documentary semiotics and documentary languages, kinds of inference to the indexing process, as well as the collaboration of Peirce's pragmatism to terminology theory. Finally, we listed issues for future research.

Mediação como processo semiótico: em busca de bases conceituais

In the context of the studies in the Information Science, the information not just depends on meaning, but the social bows are current of this. The research in development analyse conceptual elements to answer the question about the semiotic foundations of the information mediation processes. This paper aim to know and analyse the semiotic foundations of the information mediation processes in the Information Science context. It presents concepts and reflections regarding the relationship of the information mediation process Charles Peirce's Semiotics, especially, the discussion about the semiotic bases to information mediation process. It discusses the information mediation as a specialization of the communication process, developed, fundamentally, for the human action trying to solve communication and technical problems in sociocultural order.

Os contributos da semiótica para o desenvolvimento do pensamento jurídico dos séculos XX e XXI: possibilidades de abordagem das problemáticas de positivismo e o pós-positivismo a partir da semiótica jurídica

Pós-graduação em Direito - FCHS

Teorema de Pitágoras: algumas extensões/generalizações e atividades com o Software GeoGebra

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Das letras às telas: a tradução intersemiótica de Ensaio sobre a cegueira

Pós-graduação em Letras - FCLAS

Discurso e imagem: transformações do cânone visual nas mídias digitais

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Rigidez dos triângulos

Pós-graduação em Matemática em Rede Nacional - IBILCE

Estabilizações e mudanças na composição semiótica da imagem de Cristo: o cruzamento entre sagrado e profano

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo semiótico sobre a verbovisualidade em manuais de língua inglesa

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Da Linguagem verbal à sincrética: o romance O passado, de Alan Pauls, e sua transcrição para o cinema por Héctor Babenco

The goal of this paper is to reflect on the process of adaptation from literature to cinema in order to understand how are made the choices in this kind of transposition. For that, we will analyze the case of the novel The Past (2003), by Alan Pauls, and its translation into the film language (2007) by Héctor Babenco, using reflections from semiotic studies of literature and cinema

Um estudo sobre as interações discursivas numa aula experimental de Física

This is a study on importance the discourse of the teacher associated with social interactions triggered in classroom from of an experimental activity. We will analyzed a trial class in which a physics teacher of a public school Guaratinguetá city interacted with their student, seeking to categorize certain movements of the teacher's speech and identify the moments when this could establish the definition of the situation, mediation semiotic and intersubjectivity