Daniel Chagas | Universidade de Fortaleza (original) (raw)

Papers by Daniel Chagas

The potential of digital TV demonstrates that it could be an excellent connection between map inf... more The potential of digital TV demonstrates that it could be an excellent connection between map information suppliers and citizen, users of such information. The Brazilian digital television standard will be fully adopted in Brazil in 2016 and starts to be adopted in almost all Latin American Countries. It will reach many areas, being accessible to about 600000 people. Nevertheless, the Brazilian digital television standard and user population profile imposes restrictions on map access on TV or mobile screens, which leads to the challenge of this work. This article describes the analysis five criteria of three final prototypes of an educational application of maps for TV or mobile devices, based on ZAPROS III analysis. The results show the best interaction solutions suitable for DTV and mobile for maps.

Proceedings of the 14th Brazilian Symposium on Human Factors in Computing Systems, 2015

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to make a prototype of a remote control which enables more natural user interaction. The physical prototype of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data on users' performance and satisfaction was collected, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the solution, analyzed for a sample of 18 users, increased performance for typing long texts by 26.5%, raised satisfaction scores by 15%, relaxation scores by 29.4%, and maintained the users' cognitive load when compared to use of an infrared remote control.

die.ufpi.br

Page 1. Uma investigação de problemas de Usabilidade, Comunicabilidade e Sociabilidade do Moodle ... more Page 1. Uma investigação de problemas de Usabilidade, Comunicabilidade e Sociabilidade do Moodle que afetam os objetivos educativos pré-definidos para suas ferramentas colaborativas Rafaela P. Lisboa, Daniel A. Chagas, Hermínio Borges Neto, Elizabeth S. Furtado ...

Journal on Interactive Systems, 2018

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to make a prototype of a remote control which enables more natural user interaction. The physical prototype of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data on users’ performance and satisfaction was collected, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the solution, analyzed for a sample of 18 users, increased performance for typing long texts by 26.5%, raised satisfaction scores by 15%, relaxation scores by 29.4%, and maintained the users’ cognitive load when compared to use of an infrared remote control.

Proceedings of the 14th Brazilian Symposium on Human Factors in Computing Systems, 2015

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to prototype a remote control that makes user interaction more natural. Physical prototyping of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data was collected on users' performance and satisfaction, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the prototyped solution, analyzed for a sample of 18 users, increased performance in typing long texts in 26.5%, raised satisfaction scores by 15% and relaxation scores by 29.4%, and maintained the users' cognitive load compared to use of an infrared remote control.

SBC Journal on Interactive Systems, 2018

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to make a prototype of a remote control which enables more natural user interaction. The physical prototype of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data on users’ performance and satisfaction was collected, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the solution, analyzed for a sample of 18 users, increased performance for typing long texts by 26.5%, raised satisfaction scores by 15%, relaxation scores by 29.4%, and maintained the users’ cognitive load when compared to use of an infrared remote control.

In a connected world, where information is the most valuable input, compulsory education in compu... more In a connected world, where information is the most valuable input, compulsory education in computational thinking, especially in early ages, had became an important topic for governments who aim in a economy based on technology. This brought initiatives for compulsive adoption on basic education in USA and EU, but few actions on developing countries. This article presents a systematic review of academic papers and commercial products that present the teaching of logic to young people, and that deal with the use of tangible devices, robots or specific software. From the analysis performed with the review, we define requirements for teaching. Thus, considering the factors of analysis, such as pricing and replicability, we generate a series of sub-requirements aimed at adopting a solution for public schools from developing countries. As preliminary results, an interactive robot and a set of tangible artifacts adhering to the identified requirements are presented as a proposal for the ...

International Journal of Electronic Government Research

The relationship between governments and their citizens has changed with the rise of ICTs. Even i... more The relationship between governments and their citizens has changed with the rise of ICTs. Even if these changes can strengthen the active role of society in the control and participation of public administration, there is a risk that this process can increase exclusion especially in developing countries, mainly because a large part of the population does not have access at all times to the facilities and services provided by ICTs. This article describes e-Totem, a software and hardware platform produced to support inclusive e-participation in large cities. It is also described three popular participation initiatives implemented using the platform, from which hundreds of thousands of citizen interactions were obtained from the platform. e-Totem is customized to be inclusive and suitable for use in such a wide variety of scenarios as well as being used by such a significant volume of people.

Anais Estendidos do Simpósio Brasileiro de Fatores Humanos em Sistemas Computacionais (IHC)

Neste artigo, são descritas as principais pesquisas realizadas em um laboratório de pesquisa de e... more Neste artigo, são descritas as principais pesquisas realizadas em um laboratório de pesquisa de experiência do usuário (UX) e Interação Humano-Computador (IHC) desde o seu surgimento em 1999 em Fortaleza, CE. As pesquisas realizadas no Laboratório de estudos do Usuário e da Qualidade do uso de Sistemas (LUQS) e laboratórios parceiros produzem muitos resultados acadêmicos, que têm os seguintes beneficiários: os alunos, os programas universitários envolvidos e, especialmente, a Região Nordeste do Brasil. Destaca-se, também, o trabalho do grupo de pesquisa com empresas locais, realizando ações de evangelização UX / IHC nos processos das empresas, além de ações para aprimorar seus produtos.

Anais Estendidos do XVII Simpósio Brasileiro de Fatores Humanos em Sistemas Computacionais (IHC)

A presente pesquisa busca trazer uma releitura dos trabalhos de Papert na criação de uma linguage... more A presente pesquisa busca trazer uma releitura dos trabalhos de Papert na criação de uma linguagem de programação para crianças, à luz da educação tecnológica (STEM) e das interfaces tangíveis. Propõe a criação, avaliação e adoção de artefatos físicos e virtuais no ensino de lógica e matemática para crianças, adaptadas a diferentes perfis de idade, aderentes aos requisitos de ensino da realidade escolar brasileira. Busca também investigar práticas para apoio ao professor na adoção de tecnologias na sala de aula.

Lecture Notes in Computer Science, 2015

This papel presents an avaliation methodology for learning virtual environments to be used by ins... more This papel presents an avaliation methodology for learning virtual environments to be used by institutions, teachers or developers who need to verify the impact of usability, comunicability and sociability in their courses. This evaluation is original due to the fact we made the association between the educational objectives of the system tools and the quality in use factors, such as its usability, sociability and communicability. Resumo. Este artigo visa apresentar uma metodologia de avaliação de ambientes virtuais de aprendizagem a ser usada por instituições, professores ou desenvolvedores que necessitam verificar o impacto da usabilidade, comunicabilidade e sociabilidade em seus cursos. A originalidade desta proposta se refere à avaliação ser feita a partir da verificação entre os objetivos pedagógicos das ferramentas do ambiente e os fatores que incidem sobre a qualidade de uso do ambiente, como sua usabilidade, comunicabilidade e sociabilidade.

ABSTRACT The potential of digital TV demonstrates that it could be an excellent connection betwee... more ABSTRACT The potential of digital TV demonstrates that it could be an excellent connection between map information suppliers and citizen, users of such information. Its scope, when fully adopted in Brazil in 2015, will reach many areas of the country, being accessible to about 96% of the population. Nevertheless, the Brazilian digital television standard and user population profile imposes restrictions on map access on TV screen, which leads to the challenge of this work. This article describes the analisys of three final prototypes of application using maps on TVD, and the development of an interaction model that supports interaction via remote control, based on four perspectives: concepts, navigation, presentation and structuring. The results show the generality of the interaction model, as well as the advantages and limitations of our solutions interact via remote control.

International Journal of Computers and Applications, 2014

Proceedings of the 19th Brazilian symposium on Multimedia and the web - WebMedia '13, 2013

ABSTRACT The progress of information technology has made objects continuously acquire new resourc... more ABSTRACT The progress of information technology has made objects continuously acquire new resources and communication skills, therefore we have to change the way we interact with them. As the mainstream media of the twentieth century, television has also followed this trend. TV is changing from a passive medium, from which the viewer only receives information, into an active media, with which there is interaction facilitated by the option of choice, participation and even creating new content. However, the experience of interactive television is often barred by the problems inherent to dealing with the remote control. Especially, when it comes to a task, that is too complex to be done with a standard remote control: the task of putting data in text format into the TV. This paper presents an ongoing research that addresses the input of text data in digital television proposing an attention-aware system.

die.ufpi.br

This report presents the results of the evaluation of Moodle Learning Virtual Environment, using ... more This report presents the results of the evaluation of Moodle Learning Virtual Environment, using a methodology that was structured from personas. They were initially defined considering the profiles of users suggested (young adult and elderly), and with the realization of evaluation experiments, other contextual features were revealed, such as the participant's familiarity with technology. This evaluation is original due to the fact we made the association between the educational objectives of using the environment expected by the teacher and the quality in use factors of Moodle, such as its usability, sociability and communicability.

The potential of digital TV demonstrates that it could be an excellent connection between map inf... more The potential of digital TV demonstrates that it could be an excellent connection between map information suppliers and citizen, users of such information. The Brazilian digital television standard will be fully adopted in Brazil in 2016 and starts to be adopted in almost all Latin American Countries. It will reach many areas, being accessible to about 600000 people. Nevertheless, the Brazilian digital television standard and user population profile imposes restrictions on map access on TV or mobile screens, which leads to the challenge of this work. This article describes the analysis five criteria of three final prototypes of an educational application of maps for TV or mobile devices, based on ZAPROS III analysis. The results show the best interaction solutions suitable for DTV and mobile for maps.

Proceedings of the 14th Brazilian Symposium on Human Factors in Computing Systems, 2015

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to make a prototype of a remote control which enables more natural user interaction. The physical prototype of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data on users' performance and satisfaction was collected, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the solution, analyzed for a sample of 18 users, increased performance for typing long texts by 26.5%, raised satisfaction scores by 15%, relaxation scores by 29.4%, and maintained the users' cognitive load when compared to use of an infrared remote control.

die.ufpi.br

Page 1. Uma investigação de problemas de Usabilidade, Comunicabilidade e Sociabilidade do Moodle ... more Page 1. Uma investigação de problemas de Usabilidade, Comunicabilidade e Sociabilidade do Moodle que afetam os objetivos educativos pré-definidos para suas ferramentas colaborativas Rafaela P. Lisboa, Daniel A. Chagas, Hermínio Borges Neto, Elizabeth S. Furtado ...

Journal on Interactive Systems, 2018

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to make a prototype of a remote control which enables more natural user interaction. The physical prototype of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data on users’ performance and satisfaction was collected, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the solution, analyzed for a sample of 18 users, increased performance for typing long texts by 26.5%, raised satisfaction scores by 15%, relaxation scores by 29.4%, and maintained the users’ cognitive load when compared to use of an infrared remote control.

Proceedings of the 14th Brazilian Symposium on Human Factors in Computing Systems, 2015

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to prototype a remote control that makes user interaction more natural. Physical prototyping of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data was collected on users' performance and satisfaction, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the prototyped solution, analyzed for a sample of 18 users, increased performance in typing long texts in 26.5%, raised satisfaction scores by 15% and relaxation scores by 29.4%, and maintained the users' cognitive load compared to use of an infrared remote control.

SBC Journal on Interactive Systems, 2018

This paper defines requirements for entering text in interactive digital TV, based on theories of... more This paper defines requirements for entering text in interactive digital TV, based on theories of shared attention, in order to make a prototype of a remote control which enables more natural user interaction. The physical prototype of this newly created device features movement recognition and sensory feedback as modalities of interaction. In usability tests, data on users’ performance and satisfaction was collected, as well as data on their cognitive load (attention) and state of meditation (relaxation) captured through an Electroencephalogram device. The results showed that the solution, analyzed for a sample of 18 users, increased performance for typing long texts by 26.5%, raised satisfaction scores by 15%, relaxation scores by 29.4%, and maintained the users’ cognitive load when compared to use of an infrared remote control.

In a connected world, where information is the most valuable input, compulsory education in compu... more In a connected world, where information is the most valuable input, compulsory education in computational thinking, especially in early ages, had became an important topic for governments who aim in a economy based on technology. This brought initiatives for compulsive adoption on basic education in USA and EU, but few actions on developing countries. This article presents a systematic review of academic papers and commercial products that present the teaching of logic to young people, and that deal with the use of tangible devices, robots or specific software. From the analysis performed with the review, we define requirements for teaching. Thus, considering the factors of analysis, such as pricing and replicability, we generate a series of sub-requirements aimed at adopting a solution for public schools from developing countries. As preliminary results, an interactive robot and a set of tangible artifacts adhering to the identified requirements are presented as a proposal for the ...

International Journal of Electronic Government Research

The relationship between governments and their citizens has changed with the rise of ICTs. Even i... more The relationship between governments and their citizens has changed with the rise of ICTs. Even if these changes can strengthen the active role of society in the control and participation of public administration, there is a risk that this process can increase exclusion especially in developing countries, mainly because a large part of the population does not have access at all times to the facilities and services provided by ICTs. This article describes e-Totem, a software and hardware platform produced to support inclusive e-participation in large cities. It is also described three popular participation initiatives implemented using the platform, from which hundreds of thousands of citizen interactions were obtained from the platform. e-Totem is customized to be inclusive and suitable for use in such a wide variety of scenarios as well as being used by such a significant volume of people.

Anais Estendidos do Simpósio Brasileiro de Fatores Humanos em Sistemas Computacionais (IHC)

Neste artigo, são descritas as principais pesquisas realizadas em um laboratório de pesquisa de e... more Neste artigo, são descritas as principais pesquisas realizadas em um laboratório de pesquisa de experiência do usuário (UX) e Interação Humano-Computador (IHC) desde o seu surgimento em 1999 em Fortaleza, CE. As pesquisas realizadas no Laboratório de estudos do Usuário e da Qualidade do uso de Sistemas (LUQS) e laboratórios parceiros produzem muitos resultados acadêmicos, que têm os seguintes beneficiários: os alunos, os programas universitários envolvidos e, especialmente, a Região Nordeste do Brasil. Destaca-se, também, o trabalho do grupo de pesquisa com empresas locais, realizando ações de evangelização UX / IHC nos processos das empresas, além de ações para aprimorar seus produtos.

Anais Estendidos do XVII Simpósio Brasileiro de Fatores Humanos em Sistemas Computacionais (IHC)

A presente pesquisa busca trazer uma releitura dos trabalhos de Papert na criação de uma linguage... more A presente pesquisa busca trazer uma releitura dos trabalhos de Papert na criação de uma linguagem de programação para crianças, à luz da educação tecnológica (STEM) e das interfaces tangíveis. Propõe a criação, avaliação e adoção de artefatos físicos e virtuais no ensino de lógica e matemática para crianças, adaptadas a diferentes perfis de idade, aderentes aos requisitos de ensino da realidade escolar brasileira. Busca também investigar práticas para apoio ao professor na adoção de tecnologias na sala de aula.

Lecture Notes in Computer Science, 2015

This papel presents an avaliation methodology for learning virtual environments to be used by ins... more This papel presents an avaliation methodology for learning virtual environments to be used by institutions, teachers or developers who need to verify the impact of usability, comunicability and sociability in their courses. This evaluation is original due to the fact we made the association between the educational objectives of the system tools and the quality in use factors, such as its usability, sociability and communicability. Resumo. Este artigo visa apresentar uma metodologia de avaliação de ambientes virtuais de aprendizagem a ser usada por instituições, professores ou desenvolvedores que necessitam verificar o impacto da usabilidade, comunicabilidade e sociabilidade em seus cursos. A originalidade desta proposta se refere à avaliação ser feita a partir da verificação entre os objetivos pedagógicos das ferramentas do ambiente e os fatores que incidem sobre a qualidade de uso do ambiente, como sua usabilidade, comunicabilidade e sociabilidade.

ABSTRACT The potential of digital TV demonstrates that it could be an excellent connection betwee... more ABSTRACT The potential of digital TV demonstrates that it could be an excellent connection between map information suppliers and citizen, users of such information. Its scope, when fully adopted in Brazil in 2015, will reach many areas of the country, being accessible to about 96% of the population. Nevertheless, the Brazilian digital television standard and user population profile imposes restrictions on map access on TV screen, which leads to the challenge of this work. This article describes the analisys of three final prototypes of application using maps on TVD, and the development of an interaction model that supports interaction via remote control, based on four perspectives: concepts, navigation, presentation and structuring. The results show the generality of the interaction model, as well as the advantages and limitations of our solutions interact via remote control.

International Journal of Computers and Applications, 2014

Proceedings of the 19th Brazilian symposium on Multimedia and the web - WebMedia '13, 2013

ABSTRACT The progress of information technology has made objects continuously acquire new resourc... more ABSTRACT The progress of information technology has made objects continuously acquire new resources and communication skills, therefore we have to change the way we interact with them. As the mainstream media of the twentieth century, television has also followed this trend. TV is changing from a passive medium, from which the viewer only receives information, into an active media, with which there is interaction facilitated by the option of choice, participation and even creating new content. However, the experience of interactive television is often barred by the problems inherent to dealing with the remote control. Especially, when it comes to a task, that is too complex to be done with a standard remote control: the task of putting data in text format into the TV. This paper presents an ongoing research that addresses the input of text data in digital television proposing an attention-aware system.

die.ufpi.br

This report presents the results of the evaluation of Moodle Learning Virtual Environment, using ... more This report presents the results of the evaluation of Moodle Learning Virtual Environment, using a methodology that was structured from personas. They were initially defined considering the profiles of users suggested (young adult and elderly), and with the realization of evaluation experiments, other contextual features were revealed, such as the participant's familiarity with technology. This evaluation is original due to the fact we made the association between the educational objectives of using the environment expected by the teacher and the quality in use factors of Moodle, such as its usability, sociability and communicability.