About Eduardo Ogasawara

Website: http://eic.cefet-rj.br/~eogasawara/
eogasawara has written 39 articles so far, you can find them below.

Dissertation defense (July 12, 2019): Gabriel Nascimento dos Santos

Student: Gabriel Nascimento dos Santos

Title: Treatment of words outside the vocabulary in tasks of analysis of feelings with lexicons

Advisors: Gustavo Paiva Guedes e Silva (advisor)

Committee: Gustavo Paiva Guedes e Silva (president), Eduardo Bezerra da Silva (CEFET/RJ)  Fellipe Ribeiro Duarte (UFRRJ/RJ), Ronaldo Ribeiro Goldschmidt (IME-RJ)

Day/Time: July, 12 / 14h

Room: Auditorium 5

Abstract:

The number of Internet users who use social networks, microblogs and review sites has been increasing significantly in recent years. With this, users tend to express their opinions and convey what they feel about a given service, product, and the most diverse issues, like policy. This has attracted the interest of natural language processing researchers, especially those of Sentiment Analysis, who are interested in exploring techniques to extract and understand the opinions provided by users who use opinions-oriented services. The Sentiment Analysis has three approaches: machine-learning based approach, lexical-based approach, and hybrid approach. The lexical and hybrid approaches suffer from the problem of out-of-vocabulary words in dealing with the nature of social network texts. Dealing with texts from social networks is a big challenge because they range from well-written texts to completely meaningless sentences. This occurs for a number of reasons, such as limiting the number of characters (such as Twitter) and even intentional misspellings. This work proposes an algorithm that uses word embeddings to treat words out of vocabulary in Analysis tasks with approaches based on lexical or hybrid approaches. The strategy of the proposed algorithm is based on the hypothesis that words that occur in similar context tend to have similar meanings. The algorithm consists of choosing the most semantically similar words and using the features of the closest one that is contained in the lexicon used. The experiments were conducted in three datasets in Brazilian Portuguese. Three classifiers were used and improvements of up to 3.3% in the F1 score were observed after the use of the proposed algorithm.

Previous exams

2019-2 English Language test questions notebook English Language test answer key Computational Base test questions notebook Computational Base test answer key 2019-1 English Language test questions notebook English Language test answer key Computational Base test questions notebook Computational Base test answer key 2018-3 English Language test questions notebook English Language test answer key Computational Base […]
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Defesa de dissertação (08/05/2019): Roberto de Castro Souza Pinto

Student: Roberto de Castro Souza Pinto Title: Ferramenta Robótica para Trabalho com Fotografia Avançada – TilBOT Advisors: João Roberto de Toledo Quadros (orientador) Committee: João Roberto de Toledo Quadros (presidente), Aline Gesualdi Manhães (CEFET/RJ)  Eduardo Soares Ogasawaa (CEFET/RJ), Joel André Ferreira dos Santos (CEFET/RJ), Paulo Fernando Ferreira Rosa (IME-RJ) Day/Time: May, 8 / 14h Room: […]
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Dissertation Defense (28/03/2019): Flavio Matias Damasceno de Carvalho

Student: Flavio Matias Damasceno de Carvalho Title: Development of the Portuguese LIWC 2015 Dictionary Advisors: Gustavo Paiva Guedes e Silva (CEFET/RJ) Committee: Gustavo Paiva Guedes e Silva (CEFET/RJ) (presidente), Eduardo Soares Ogasawara (CEFET/RJ), Joel André Ferreira dos Santos (CEFET/RJ), Lilian Vieira Ferrari (UFRJ) Day/Time: March 28 / 10h Room: Auditorium V Abstract: A great variety […]
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Dissertation Defense (25/02/2019): João Antônio de Ferreira

Student: João Antônio de Ferreira Title:  An Algebraic framework for Data Analysis Workflows in Apache Spark Advisors: Eduardo Soares Ogasawara (advisor), Rafaelli de Carvalho Coutinho (co-advisor) Committee: Eduardo Soares Ogasawara (CEFET/RJ) (president), Rafaelli de Carvalho Coutinho (CEFET/RJ), Jorge de Abreu Soares (CEFET/RJ), Fabio Andre Machado Porto (LNCC), Leonardo Gresta Paulino Murta (UFF) Day/Time: February 25, 2 […]
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Dissertation Defense (06/02/2019): Rebecca Pontes Salles

Student: Rebecca Pontes Salles Title:  Benchmarking Nonstationary Time Series Prediction Advisors: Eduardo Soares Ogasawara (advisor), Pedro Henrique González Silva (co-advisor) Committee: Eduardo Soares Ogasawara (Cefet/RJ) (president), Pedro Henrique González Silva (Cefet/RJ), Eduardo Bezerra da Silva (CEFET/RJ), Fabio Andre Machado Porto (LNCC), Florent Masseglia (INRIA) Day/Time: February 6, 9 am Room: Auditorium V Abstract: Data preprocessing […]
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Dissertation Defense (05/02/2019): Rodrigo Tavares de Souza

Student: Rodrigo Tavares de Souza Title:  Appraisal-Spark: An approach to large-scale imputation Guiding: Jorge Abreu Soares (advisor) Bank: Jorge Abreu Soares (CEFET/RJ) (president), Eduardo Soares Ogasawara (CEFET/RJ), Ronaldo Ribeiro Goldschmidt (IME) Day/Time: 05 February/10H Room: Auditorium V Abstract: Continuously grow the volume of stored data and the demand for integration between them. This scenario increases […]
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VI Workshop da EIC

VI Workshop of the School of Informatics and Computing (WEIC) Day: 18/10/2018 – Venue: Auditorium 2 – Schedule: 9h to 12h and 14h to 21:30 Since 2013, the School of Informatics and Computing (EIC), through the program of Graduate In Computer science (PPCIC), has systematically promoted the Workshop of the School of Computer Science and Computing […]
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Poscomp 2018

The national Examination for admission to the post-graduation in computing (POSCOMP) is an examination applied in all regions of the country. POSCOMP tests knowledge in the area of computing and aims to evaluate the knowledge of candidates for postgraduate programs in computing offered in Brazil. The vast majority of post-graduation programs in the country use, […]
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Dissertation Defense: Raphael Silva de Abreu

Student: Raphael Silva de Abreu Title: Authorship of documents Multimedia Interactive based on Synchronization of sensory effects in Relationship To Content Audiovisual Advisors: Joel A. F. Dos Santos, Eduardo Bezerra da Silva (co-advisor) Jury: Joel A. F. Dos Santos (CEFET/RJ) (President), Eduardo Bezerra da Silva (CEFET/RJ), Gustavo Paiva Guedes e Silva (Cefet/RJ), Glauco Fiorott Amorim […]
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Dissertation Defense: Rafael Guimarães Rodrigues

Student: Rafael Guimarães Rodrigues Title: Analysis of semantic aspects in automatic translations of texts Advisor: Gustavo Paiva Guedes e Silva Committee: Gustavo Paiva Guedes e Silva (Cefet/RJ) (President), Eduardo Bezerra da Silva (CEFET/RJ), Eduardo Soares Ogasawara (Cefet/RJ) and Lilian Vieira Ferrari (UFRJ) Day/Time: July 4, 2018/10h Room: Auditorium V Abstract Automatic text translations emerged in […]
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VIII Latin American on Cliques in Graphs

VIII Latin American on Cliques in Graphs (LAWCG 2018) A Satellite Event of ICM 2018 (International Congress of Mathematicians) August 9-11, 2018 Rio de Janeiro, Brazil http://lawcg2018.icomp.ufam.edu.br/ CALL FOR PAPERS The 8th Latin American Workshop on Cliques in Graphs will be held on August 9-11, 2018 in Rio de Janeiro, Brazil. The workshop is meant to foster interaction […]
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Latin America Data Science Workshop

The First Latin America Workshop on Data Science (LADaS 2018) A VLDB 2018 workshop August 27, 2018 Rio de Janeiro, Brazil http://eic.cefet-rj.br/ladas2018 CALL FOR PAPERS Dealing with the data deluge produced nowadays in different areas, ranging from basic sciences to billions of users of Global Internet services, emerges as one of the major challenges of […]
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Data Science Journey

The programming of the Data Science Day this year will take place at the LNCC on March 9, 2018 is available. The detailing of the event schedule is in attached. V WORKSHOP on Data science Data Science Journey – LNCC 2018 Summer Program Auditorium A, LNCC/MCTIC, Petrópolis, RJ, March 09, 2018 Organization: Fabio Porto (LNCC), […]
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Lectures of Prof. Patrick Valduriez and Esther Pacitti at CEFET/RJ

Lectures of Prof. Patrick Valduriez and Esther Pacitti at CEFET/RJ The graduate program in Computer Science (PPCIC) of the Federal Center of Technological Education Celso Suckow da Fonseca (CEFET/RJ) proudly invites the community to attend the lectures of Prof. Patrick Valduriez (INRIA & LIRMM) e Esther Pacitti (Inria&Cnrs, University fo Montpellier). O Prof. Patrick Valduriez […]
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