Página 7 dos resultados de 197 itens digitais encontrados em 0.022 segundos

Avaliação clínica e laboratorial de diferentes sistemas adesivos em dentistaria restauradora

Vinagre, Alexandra Rosa Rodrigues
Fonte: Universidade de Coimbra Publicador: Universidade de Coimbra
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
17.421538%
Introdução A execução de restaurações adesivas diretas com resinas compostas assume-se como o procedimento de eleição no tratamento de dentes posteriores. Contudo, a limitada durabilidade clínica destas restaurações deve-se, essencialmente, à perda progressiva da integridade das respetivas interfaces adesivas. De facto, nenhuma estratégia adesiva é isenta de sensibilidade técnica e a especificidade das diferentes moléculas, a sua proporção relativa e o modo como interagem entre si e com os substratos diferem grandemente entre as diferentes classes de sistemas adesivos, com repercussões sobre a qualidade da adesão proporcionada por cada uma. A simplificação dos procedimentos adesivos parece ser uma realidade incontornável, tendo catapultado os sistemas autocondicionantes para um patamar de relevo na área da dentistaria adesiva. Contudo a carência de estudos clínicos randomizados que comprovem a sua eficácia é notória, particularmente na avaliação do seu desempenho na restauração de dentes posteriores. Este trabalho teve duas vertentes de investigação: a primeira com base na execução de um estudo clínico randomizado cujo objetivo foi avaliar a eficácia a um ano de cinco sistemas adesivos em restaurações de cavidades oclusais realizadas com uma resina composta e a segunda com base num ensaio laboratorial que visou comparar as forças de adesão ao esmalte humano preparado com broca de dois sistemas adesivos do tipo condicionar e lavar e de três sistemas adesivos autocondicionantes aplicados de forma ativa ou passiva...

Brincadeira e aprendizagem : concepções docentes na educação infantil

Neitzel, Scheila Thais Lüdke
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Dissertação Formato: application/pdf
Português
Relevância na Pesquisa
17.545538%
A presente pesquisa investigou concepções de professoras de Educação Infantil sobre as relações estabelecidas entre a brincadeira e a aprendizagem. Foram realizadas observações em salas de aula e entrevistas com seis professoras, com inspiração no Método Clínico Piagetiano. Foram analisadas as falas das docentes com relação à brincadeira na Educação Infantil, aprendizagem e tipo de intervenção nos tempos dedicados ao brincar, comparando-as com a prática pedagógica observada. A pesquisa teve fundamentação teórica na Epistemologia Genética, sobretudo na obra A formação do símbolo na criança, de Jean Piaget. As análises foram feitas com base, além de Piaget, nas obras de Kamii e DeVries, Becker e Fortuna. As professoras relacionaram a brincadeira e a aprendizagem sob duas formas principais. A primeira caracteriza-se pelo ensino de conteúdos através de jogos com regras estruturadas, comandados pelo professor, os quais proporcionariam a aprendizagem de conteúdos escolares presentes em tais jogos. Tal configuração está baseada na corrente epistemológica empirista, segundo a qual o conhecimento é resultado da pressão do meio sobre o sujeito, sendo o professor responsável por inscrever os saberes na mente do educando. A segunda caracteriza-se pela aprendizagem de boas condutas...

Vivências morais na escola: uma análise piagetiana sobre crianças de 5 a 6 anos em situações de jogos infantis

Benetti, Aline Aparecida Cardoso Fernandes
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Dissertação de Mestrado Formato: 190 f. : il.
Português
Relevância na Pesquisa
17.490574%
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Pós-graduação em Educação - FCT; Esta dissertação versa sobre “Vivências Morais na escola: uma análise piagetiana sobre crianças de 5 a 6 anos em situações de jogos infantis” e pertence à linha de pesquisa “Processos Formativos, Diferenças e Valores”, do Programa de Pós Graduação em Educação da Universidade Estadual Paulista, Campus de Presidente Prudente. A pesquisa originou-se de nossa preocupação em lidar com os conflitos e vivências morais das crianças em idade pré-escolar. Estabelecemos como objetivo investigar se a presença ou a ausência do adulto influenciam as vivências morais das crianças, quando participam de jogos dirigidos ou espontâneos, na escola. A pesquisa se deu a partir de situações de jogos, em que analisamos: a consciência e a prática das regras, o respeito unilateral e/ou mútuo entre crianças e entre crianças e adulto, a centração e a descentração, nas relações criança-criança. Para tanto, optamos por uma pesquisa qualitativa, buscando fundamentação na Teoria e Método Clínico de Piaget (1932/1994), mais especificamente sua Teoria do Juízo Moral na Criança (1932). Os dados empíricos foram coletados a partir de observações das crianças em situações de jogos dirigidos e espontâneos...

HQtrônica: atividade programada e curso de extensão

Arruda, Amanda Rigitano Ferraz de
Fonte: Universidade Estadual Paulista (UNESP) Publicador: Universidade Estadual Paulista (UNESP)
Tipo: Trabalho de Conclusão de Curso Formato: 52 f.
Português
Relevância na Pesquisa
17.178884%
This Final Course Work’s main subject comes from a study made on my previous Final Course Work titled “Artemídia Preferente: Fenômeno ‘Jogar&Ler’ nas Histórias em Quadrinhos Interativas (HQI) com os games do RPG”, and it is fed by the shortage of Electronical Comic publications, classes, courses and activities that could suit for educational purposes and experiences for a capable kind of audience to learn it and do it. Specific issues about Electronic Comic will be presented, based on Célestin Freinet’s Pedagogy, on some books about Methodology and on the Brazilian Curriculum Guidelines required for graduation. After that, a Lesson Plan will be developed for a 14 year-old-or-older kind of audience where they will be capable of making their own Electronic Comic, being it educational-themed or not. This study also cares about the participants’ influences on their lives to be completed. Furthermore, this work is inserted in the line of the research “Artistic Processes and Procedures” of the Department of Fine Arts from the Art Institute of UNESP, whose methodology used was the Freinet Educational Cybernetics, developed in the research group “Media Arts and Videoclip” leaded by the leading advisor for this Final Course Work. The result and discussion of artistic and scientific research were reported in monographs such as this that I present...

m-arte : arte_comunicação_móvel

Lucena, Tiago Franklin Rodrigues
Fonte: Universidade de Brasília Publicador: Universidade de Brasília
Tipo: Dissertação
Português
Relevância na Pesquisa
17.297893%
Dissertação (mestrado)—Universidade de Brasília, Instituto de Artes, Programa de Pós-Graduação em Arte, 2009.; A dissertação m-arte: arte_comunicação_móvel é fruto de uma pesquisa prática-téorica, cujo objetivo foi o de estudar a relação existente entre arte e os dispositivos móveis (aparelhos celulares, palmtops, netbooks), consolidando o campo da Arte em Mídias Móveis, que denominamos m-arte. Iniciamos nossa pesquisa abordando a conexão e presença das câmeras nos aparelhos celulares (cellcams) e as possibilidades de criação com este dispositivo no audiovisual. Artistas são usuários e se mostram para o mundo através das lentes e conexão desses aparelhos. Descrevemos um breve histórico de trabalhos artísticos que usaram as redes de telecomunicação (telemática) acompanhado das mudanças sofridas pelo aparelho celular ao longo dos anos. Na Arte Telemática presenciamos o potencial comunicador da arte, defendendo que a conexão amplia os pontos de encontro entre artistas-receptores. Em nossa pesquisa, além da interatividade, característica bastante observada nos trabalhos da arte tecnológica, exploramos a m-arte; destacando as qualidades da conectividade, mobilidade, portabilidade e ubiqüidade. A criação colaborativa e em ferramentas livres (hardware e software) foi também outras ações observadas por nós no campo da m-arte. Entendemos que os dispositivos móveis são os representantes de uma vida moderna nômade marcada pelos deslocamentos espaciais urbanos dos indivíduos que passam de uma cultura marcada pelo emprego das tecnologias de comunicação digital para uma cibercultura versão 2.0 ou cultura móvel. Soma-se assim o espaço de dados das redes informáticas com o espaço físico e urbano experimentados por artistas da m-arte nas categorias da wireless mobile games...

Fairness in risky environments : theory and evidence

VAN KOTEN, Silvester; ORTMANN, Andreas; BABICKY, Vitezslav
Fonte: Instituto Universitário Europeu Publicador: Instituto Universitário Europeu
Tipo: Artigo de Revista Científica Formato: application/pdf; digital
Português
Relevância na Pesquisa
17.234346%
The relationship between risk in the environment, risk aversion and inequality aversion is not well understood. Theories of fairness have typically assumed that pie sizes are known ex-ante. Pie sizes are, however, rarely known ex ante. Using two simple allocation problems—the Dictator and Ultimatum game—we explore whether, and how exactly, unknown pie sizes with varying degrees of risk (“endowment risk”) influence individual behavior. We derive theoretical predictions for these games using utility functions that capture additively separable constant relative risk aversion and inequity aversion. We experimentally test the theoretical predictions using two subject pools: students of Czech Technical University and employees of Prague City Hall. We find that: (1) Those who are more risk-averse are also more inequality-averse in the Dictator game (and also in the Ultimatum game but there not statistically significantly so) in that they give more; (2) Using the within-subject feature of our design, and in line with our theoretical prediction, varying risk does not influence behavior in the Dictator game, but does so in the Ultimatum game (contradicting our theoretical prediction for that game); (3) Using the within-subject feature of our design...

Rice University football player Ken Simmons

Fonte: Rice University Publicador: Rice University
Português
Relevância na Pesquisa
17.325593%
Black and white photograph of Rice Owls football player Ken Simmons, accompanied by text headlining his achievement of the Distinguished "R" Award.; Caption reads: One of KEN SIMMONS’ (class of 1963) favorite exhortations to anyone seeking advice is – “Whatever you do in life, run all the way across the finish line.” Although Simmons’ sport was football and not track, it is a maxim he followed throughout his very successful athletic, academic and business pursuits. As a three-year varsity letterwinner (1960-1962), Simmons has the distinction of playing in two bowl games in one year – the Cotton Bowl (Jan. 1961) and the Bluebonnet Bowl (Dec. 1961). Although football was a major activity for Simmons at Rice, he also served as Treasurer of Will Rice College and Undergraduate Representative to the “R” Association. He pursued academics as diligently as he pursued the goal line, appearing on the President’s Honor Roll more than once, earning his B.A. degree in economics. A serious student throughout his life, Simmons received his M.A. and Ph.D. degrees in American Civilization from the University of Texas, where his field of specialization was the role of the business institution in American society. His dissertation, titled Managed Care: Right Idea...

Use of three-dimensional environments in educational multimedia: new possibilities for improving learning

Armenteros, Manuel
Fonte: Formatex Publicador: Formatex
Tipo: info:eu-repo/semantics/conferenceObject; info:eu-repo/semantics/article Formato: application/pdf
Publicado em /11/2006 Português
Relevância na Pesquisa
17.491647%
This investigation analyzes the design of didactic materials based on a model similar to games. The degree of attraction and entertainment that show the young people towards games seems to mark new line of educative hypermedia development. Several projects exist where it advances in this line of research. Nevertheless, a certain ignorance in the use of guidelines of design as pedagogical in the development of these resources is observed as much. In this research several of the resources analyze themselves multimedia that follows this line. It is divided in three sections: one, the analysis of the use of virtual scenes, from the point of view of the realism degree and its incidence on the attention generated in the subject; two, the navigation used that it makes possible to the subject to happen from a scene to another one, and the repercussions on the space interpretation; and three, the necessities of collaboration between the teaching staff and the multimedia professional to be able to transmit the pedagogical values that they require this type of didactic materials.; 5 pages, 4 figures.-- Contributed to: IV International Conference on Multimedia and Information and Communication Technologies in Education: "Current Developments in Technology-Assisted Education" (m-ICTE2006...

Signals and the Structure of Societies; Signale und Gesellschaftsstruktur

Mühlenbernd, Roland
Fonte: Universität Tübingen Publicador: Universität Tübingen
Tipo: Dissertation; info:eu-repo/semantics/doctoralThesis
Português
Relevância na Pesquisa
17.57582%
This Ph.D. project focuses on the evolution and emergence of conventions and the search for an answer to the question posed by Lewis (1969): how can linguistic meaning arise and become a convention without prior agreements? By considering that agreements need language, we would come to a paradox: language is needed for language to emerge. Lewis paved the way for refuting this paradox by showing that, with the game-theoretic model of a signaling game, conventional linguistic meaning can arise without such agreements. The technical outcome of my dissertation is an extended and refined game model of signaling games concerned with the analysis of language conventions. Only this model combines features that fulfill two essential preconditions that were missing in Lewis's original account. These must be kept for analyzing the way linguistic meaning arises and becomes a convention without prior agreements: 1. We must analyze signaling games for a whole population of agents and not only among two players of the game. Such an analysis is essential to cope with the nature of conventions that generally emerge in societies of multiple individuals. In this dissertation, I introduced network games and applied them on artificial and social network structures to meet this precondition. 2. We must model a process of the emergence of meaning without prior agreements. In this dissertation I applied repeated signaling games to model a process rather than an instance. In addition...

1950s University of Florida Campus Scenes, (Production number 93)

Jernigan Films
Fonte: Earl Jernigan; Earl Jernigan ( Gainesville, Fla. ) Publicador: Earl Jernigan; Earl Jernigan ( Gainesville, Fla. )
Tipo: moving image
Publicado em //11/27/1956 Português
Relevância na Pesquisa
17.189828%
Production number 93: Production title: Campus Scenes, 1950's: Production date: 1953; 1956; ?: Derived from 16 mm film: Production title: Campus Scenes, 1950's: Black and white / no sound / Total running time: 00:11:43 Original format: 16 mm film. Intermediate format: Sony DVCAM. Digitization completed by: Total Video (Gainesville, Fl); 0:00 Blank ; 0:12 Newer dormitories with some women students walking by them ; 0:27 A man speaks at a microphone ; 0:24 Male students wearing rat caps ; 0:30 A class lecture ; 0:39 Men seated on chairs on a stage ; 0:48 Women and men exit from a train and a group stands on the platform beside the train (students arriving to attend the University of Florida) ; 1:20 Several men speak and one of them is UF Acting President John S. Allen ; 1:40 Stadium ; 1:43 Registration scene in the Florida Gym ; 1:54 Student Service booth opposite the Campus Shop and Bookstore ; 2:09 A group of seven men and one woman are seated in front of the large door at Century Tower. President J. Wayne Reitz and Governor LeRoy Collins are among them participating in the dedication of the Milton and Ethel Davis Carillonic Bells at Century Tower on November 3, 1956 ; 2:42 Some people are on a platform outside Bryan Hall and a microphone held by a young man is held up to another man who then speaks into it. Some of the audience is shown and the camera focuses on Governor Collins and UF President Reitz. The event possibly was the annual Law Skits presented by students in the College of Law ; 3:14 Blank ; 3:29 Four men lift a curved girder and guide it toward the top where a man secures it to the others already erected. ; 4:30 The completed structure is shown with the fabric in place over the girders. A sign above the entry reads "Pioneers of Progress". A vintage car stands on a raised platform to the front. ; 4:50 Another structure is shown with the sign "The March of Tools". Two exhibits are shown one with the sign "Yesterday" and the other with a sign stating "Today". The former shows small figures using old tools and the other shows an assembly line in a factory. ; 5:58 A sign reads "Power of the Air Age" and a man is seen looking at some type of machinery below the sign. ; 6:16 Eight men in military uniforms lead a parade. They are followed by a truck carrying a group of men who play instruments. A long line of cars follow. Each car has the letters of some sorority on it and some of the members ride in or on top of the cars. This parade precedes the start of the Sigma Chi Derby. ; 6:58 The Sigma Chi Derby commences on the field near the dormitories. A line of women is shown first. Each wears a t-shirt with the letters of her sorority. Then various games and races are shown. ; 9:42 In an auditorium a man speaks to a large group of men and women most of whom wear rat caps. ; 10:35 A group of women in dress clothes stand talking by a large number of chairs set up in what is probably the Florida gym. ; 10:47 Some event takes place in the Florida Gym. A man is shown speaking into a microphone at the podium. Dean of Women Marna Brady is one of the people on the stage. ; 11:18 A group of men are shown standing and applauding. ; 11:21 A man and woman are shown in an office. ; 11:24 A woman is shown entering an office. ; 11:30 A group of students is shown by the Student Service booth. "Orientation Information" is printed on a large sign which is on the ground in front of the booth. A sign stating "Rat Caps" is to the left of the booth.

A práxis ludo-pedagógica do professor da pré-escola; The teacher's ludo-pedagogical practice of preschool education

Eliana Maria Magnani
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 03/12/2012 Português
Relevância na Pesquisa
17.234346%
Esta pesquisa resultou de uma longa caminhada, durante a qual se identificou que muitos educadores apresentavam dificuldades no entendimento e atendimento aos interesses e necessidades lúdicas infantis. Diante disso, e da (re) implantação de brinquedotecas ocorridas, desde 2004, pela Secretaria de Educação, nos Centros Municipais Infantis (CMEIs), de uma cidade do sudoeste do Paraná, resolveu-se compreender a práxis ludo-pedagógica de professoras da pré-escola. Inicialmente, visitaram-se todos os (treze) Centros e, em seguida, ministrou-se um curso para educadores dessas instituições. Durante sua realização, identificou-se que havia entre eles três concepções referentes ao brincar: dirigido, livre e mediado. Essas informações serviram como condução para este estudo. Posteriormente, analisaram-se em quatro CMEIs (denominados de cores): a concepção e a função das professoras no tocante ao brincar e brinquedoteca; como eram selecionados e adquiridos os brinquedos que compunham o acervo desse ambiente; e com o que e como as crianças brincavam em diferentes tempos e espaços dessas instituições. Realizaram-se as ações por meio de entrevistas semiestruturadas, questionários, observações e filmagem da prática lúdica das professoras. Na revisão teórica...

Seven Staggering Sequences

Sloane, N. J. A.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 11/12/2009 Português
Relevância na Pesquisa
26.69134%
When my "Handbook of Integer Sequences" came out in 1973, Philip Morrison gave it an enthusiastic review in the Scientific American and Martin Gardner was kind enough to say in his Mathematical Games column that "every recreational mathematician should buy a copy forthwith." That book contained 2372 sequences. Today the "On-Line Encyclopedia of Integer Sequences" contains 117000 sequences. This paper will describe seven that I find especially interesting. These are the EKG sequence, Gijswijt's sequence, a numerical analog of Aronson's sequence, approximate squaring, the integrality of n-th roots of generating functions, dissections, and the kissing number problem. (Paper for conference in honor of Martin Gardner's 91st birthday.); Comment: 12 pages. A somewhat different version appeared in "Homage to a Pied Puzzler", E. Pegg Jr., A. H. Schoen and T. Rodgers (editors), A. K. Peters, Wellesley, MA, 2009, pp. 93-110

Statistical Mechanics of Dilute Batch Minority Games with Random External Information

Galla, Tobias
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
26.69134%
We study the dynamics and statics of a dilute batch minority game with random external information. We focus on the case in which the number of connections per agent is infinite in the thermodynamic limit. The dynamical scenario of ergodicity breaking in this model is different from the phase transition in the standard minority game and is characterised by the onset of long-term memory at finite integrated response. We demonstrate that finite memory appears at the AT-line obtained from the corresponding replica calculation, and compare the behaviour of the dilute model with the minority game with market impact correction, which is known to exhibit similar features.; Comment: 22 pages, 6 figures, text modified, references updated and added, figure added, typos corrected

Second Parrondo's Paradox in Scale Free Networks

Toyota, Norihito
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
17.234346%
Parrondo's paradox occurs in sequences of games in which a winning expectation value of a payoff may be obtained by playing two games in a random order, even though each game in the sequence may be lost when played individually.Several variations of Parrondo's games apparently with the same paradoxical property have been introduced by G.P. Harmer and D. Abbott; history dependence, one dimensional line, two dimensional lattice and so on. I have shown that Parrondo's paradox does not occur in scale free networks in the simplest case with the same number of parameters as the original Parrondo's paradox. It suggests that some technical complexities are needed to present Parrondo's paradox in scale free networks. In this article, I show that a simple modification with the same number of parameters as the original Parrondo's paradox creates Parrondo's paradox in scale free. This paradox is, however, created by a quite different mechanism from the original Parrondo's paradox and a considerably rare phenomenon, where the discrete property of degree of nodes is crucial. I call it the second Parrondo's paradox.; Comment: 10 pages, 5 figures, 1 Table. In new version, I refined some discussions in the section 4 and corrected some trivial typing errors. arXiv admin note: substantial text overlap with arXiv:1204.5249

The Complexity of All-switches Strategy Improvement

Fearnley, John; Savani, Rahul
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 16/07/2015 Português
Relevância na Pesquisa
17.52386%
Strategy improvement is a widely-used and well-studied class of algorithms for solving graph-based infinite games. These algorithms are parametrized by a switching rule, and one of the most natural rules is "all switches" which switches as many edges as possible in each iteration. Continuing a recent line of work, we study all-switches strategy improvement from the perspective of computational complexity. We consider two natural decision problems, both of which have as input a game G, a starting strategy s, and an edge e. The problems are: 1. The edge switch problem, namely, is the edge e, ever switched by all-switches strategy improvement when it is started from s on game G? 2. The optimal strategy problem, namely, is the edge e used in the final strategy that is found by strategy improvement when it is started from s on game G? We show PSPACE-completeness of the edge switch problem and optimal strategy problem for the following settings: Parity games with the discrete strategy improvement algorithm of Voge and Jurdzinski; mean-payoff games with the gain-bias algorithm; and discounted-payoff games and simple stochastic games with their standard strategy improvement algorithms. We also show PSPACE-completeness of an analogous problem to edge switch for the bottom-antipodal algorithm for Acyclic Unique Sink Orientations on Cubes.

Does Parrondo Paradox occur in Scale Free Networks? -A simple Consideration-

Toyota, Norihito
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 23/04/2012 Português
Relevância na Pesquisa
17.234346%
Parrondo's paradox occurs in sequences of games in which a winning expectation may be obtained by playing the games in a random order, even though each game in the sequence may be lost when played individually. Several variations of Parrondo's games apparently with paradoxical property have been introduced; history dependence, one dimensional line, two dimensional lattice and so on. In this article, we examine whether Parrondo's paradox occurs or not in scale free networks. This is interesting as an empirical study, since scale free networks are ubiquitous in our real world. First some simulation results are given and after that theoretical studies are made. As a result, we mostly confirm that Parrondo's paradox can not occur in the naive case, where the game has the same number of parameters as the original Parrondo's game.; Comment: 11 pages, 11 figures

Yet Another Hat Game

Paterson, Maura B.; Stinson, Douglas R.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 21/01/2010 Português
Relevância na Pesquisa
17.234346%
Several different "hat games" have recently received a fair amount of attention. Typically, in a hat game, one or more players are required to correctly guess their hat colour when given some information about other players' hat colours. Some versions of these games have been motivated by research in complexity theory and have ties to well-known research problems in coding theory, and some variations have led to interesting new research. In this paper, we review Ebert's Hat Game, which garnered a considerable amount of publicity in the late 90's and early 00's, and the Hats-on-a-line Game. Then we introduce a new hat game which is a "hybrid" of these two games and provide an optimal strategy for playing the new game. The optimal strategy is quite simple, but the proof involves an interesting combinatorial argument.; Comment: 13 pages

On the inverse power index problem

Kurz, Sascha
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 27/11/2012 Português
Relevância na Pesquisa
26.69134%
Weighted voting games are frequently used in decision making. Each voter has a weight and a proposal is accepted if the weight sum of the supporting voters exceeds a quota. One line of research is the efficient computation of so-called power indices measuring the influence of a voter. We treat the inverse problem: Given an influence vector and a power index, determine a weighted voting game such that the distribution of influence among the voters is as close as possible to the given target value. We present exact algorithms and computational results for the Shapley-Shubik and the (normalized) Banzhaf power index.; Comment: 17 pages, 2 figures, 12 tables

TwitterPaul: Extracting and Aggregating Twitter Predictions

UzZaman, Naushad; Blanco, Roi; Matthews, Michael
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
17.262046%
This paper introduces TwitterPaul, a system designed to make use of Social Media data to help to predict game outcomes for the 2010 FIFA World Cup tournament. To this end, we extracted over 538K mentions to football games from a large sample of tweets that occurred during the World Cup, and we classified into different types with a precision of up to 88%. The different mentions were aggregated in order to make predictions about the outcomes of the actual games. We attempt to learn which Twitter users are accurate predictors and explore several techniques in order to exploit this information to make more accurate predictions. We compare our results to strong baselines and against the betting line (prediction market) and found that the quality of extractions is more important than the quantity, suggesting that high precision methods working on a medium-sized dataset are preferable over low precision methods that use a larger amount of data. Finally, by aggregating some classes of predictions, the system performance is close to the one of the betting line. Furthermore, we believe that this domain independent framework can help to predict other sports, elections, product release dates and other future events that people talk about in social media.; Comment: Check out the blog post with a summary and Prediction Retrieval information here: http://bitly.com/TwitterPaul

Editorial

Pereira, Daniervelin Renata Marques; Grupo Texto Livre, Universidade de São Paulo
Fonte: Faculdade de Letras da Universidade Federal de Minas Gerais Publicador: Faculdade de Letras da Universidade Federal de Minas Gerais
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 19/12/2012 Português
Relevância na Pesquisa
26.69134%
Editorial para Revista Texto Livre, volume 5, número 2, 2012   Este volume 5, número 2, da Revista Texto Livre: Linguagem e Tecnologia reúne 11 artigos em torno dos eixos Educação e Tecnologia e Produção Textual e Tecnologia. Diversificada em seus olhares, esta edição traz importantes contribuições sobre formação de professores, ferramentas digitais para ensino de línguas, especificidades do hipertexto e outros estudos que contemplam as influências do ciberespaço nas práticas educativas. Abrindo o número, Gerson Bruno Forgiarini de Quadros foca em seu artigo “Aprendendo idiomas em ambientes virtuais na internet” a aprendizagem de língua espanhola em uma comunidade virtual do Livemocha. Em “Formación docente y la aplicación de nuevas tecnologías en la enseñanza de e/le en las escuelas técnicas”, Jorgelina Tallei e Iandra María Weirich Silva Coelho procuram refletir sobre o lugar do professor e do aluno em cursos específicos também para o ensino de língua espanhola pelas novas tecnologias. Angélica Ilha Gonçalves, em “Aprendizagem de língua espanhola na EaD: qual a importância do trabalho do tutor a distância?”, discute e descreve características que um professor tutor para tornar a prática de ensino-aprendizagem de línguas mais eficiente. Ainda nesse eixo temático...