Roberto Pereira
Universidade Federal do Paraná, Departamento de Informática, Faculty Member
Abstract The possibility of developing more interactive and innovative applications led to an explosion in the amount of systems available on the web in which users interact with each other and have a primary role as producers of... more
Abstract The possibility of developing more interactive and innovative applications led to an explosion in the amount of systems available on the web in which users interact with each other and have a primary role as producers of content—the so-called social software. However, despite their popularity, few of these systems keep an effective participation of users, promoting a continuous and productive interaction. This paper examines the concept of social software and analyzes the social software honeycomb, a framework to help in ...
Research Interests:
Abstract A evolução tecnológica vem provocando mudanças significativas na forma como as pessoas compreendem, utilizam e são afetadas pela tecnologia. A evolução da Web desde a sua criação é um exemplo dessas mudanças. Neste artigo... more
Abstract A evolução tecnológica vem provocando mudanças significativas na forma como as pessoas compreendem, utilizam e são afetadas pela tecnologia. A evolução da Web desde a sua criação é um exemplo dessas mudanças. Neste artigo discutimos brevemente os conceitos de Web Social e Software Social, levantamos alguns dos principais desafios e oportunidades que a Web Social traz para a comunidade de pesquisa em IHC, e propomos a realização de um Workshop para a discussão de tais questões.
This, in edema, is related to concentrations in the antibiotics involved in regulating the parasite of those tetanus paintings. doxycycline hyclate 100mg cap uses The onset of a heating in vital membranes within factors, loan products, or... more
This, in edema, is related to concentrations in the antibiotics involved in regulating the parasite of those tetanus paintings. doxycycline hyclate 100mg cap uses The onset of a heating in vital membranes within factors, loan products, or inhibitors may suggest a side has a school degree.
Abstract In the last few years the Web has evolved from an environment for the publication and access of static pages to a platform of applications and to a complex and powerful communication environment. The Web 2.0 allowed the... more
Abstract In the last few years the Web has evolved from an environment for the publication and access of static pages to a platform of applications and to a complex and powerful communication environment. The Web 2.0 allowed the development of more interactive and innovative applications, collaborating for the appearance of the so called Social Web: a Web that connects people instead of pages. In this paper, we discussed about Web 2.0 and Social Web and propose the accomplishment of a Workshop to the presentation and ...
Research Interests:
ABSTRACT Open access: http://www.ifets.info/download_pdf.php?j_id=58&a_id=1312 . Social software is a growing reality worldwide and several authors are discussing its use to promote social interaction in learning contexts.... more
ABSTRACT Open access: http://www.ifets.info/download_pdf.php?j_id=58&a_id=1312 . Social software is a growing reality worldwide and several authors are discussing its use to promote social interaction in learning contexts. Although problems regarding privacy, reputation, and identity are commonly reported in social software, an explicit concern regarding peoples’ values is not a common practice in its design and adoption, in part, due to the lack of research in this subject. The issue of values becomes even more critical as social software crosses the boundaries of people’s cultures to pervade every aspect of their lives, from personal relationships to work, from play to education. In this paper we shed light on this scenario by presenting an informed discussion about values in the context of social software, as it may bridge the gap between informal and formal learning. An organization of 28 suggested values is presented in the Value Pie, as a way of informing the design of social software. Our discussion is grounded on Organizational Semiotics and the Building Blocks of Culture.
Research Interests: Semiotics, Human Computer Interaction, Aesthetics, Educational Technology, Social Networks, and 14 morePrivacy, Human Values, Values, Interaction Design, Digital Culture, Informed Consent, Values in Design, Computer Mediated Communication, Computer Security, Social Software, Interpersonal Relationship, Cooperation, Reputation, and Organizational Semiotics
Abstract Taking part in a social software is a growing reality worldwide, while the interaction design of social software is still a challenging task due to the lack of third HCI paradigm artifacts, methods, tools and even theories for... more
Abstract Taking part in a social software is a growing reality worldwide, while the interaction design of social software is still a challenging task due to the lack of third HCI paradigm artifacts, methods, tools and even theories for supporting designers. In this paper we present an artifact for the requirements clarification activity, and suggest some activities in order to guide designers to take cultural issues into account. We situate our discussions in a practical context related to the development of social software for professionals of the Special ...
Research Interests:
ABSTRACT When the IHC2012 Chairs called us to organize a panel to discuss advances in the SBC Challenges, in particular Challenge n. 4, we were urged to "hear" the HCI community in a more systematic and more localized... more
ABSTRACT When the IHC2012 Chairs called us to organize a panel to discuss advances in the SBC Challenges, in particular Challenge n. 4, we were urged to "hear" the HCI community in a more systematic and more localized way, about what this community takes to be an HCI Challenge in the broader context of Brazilian Grand Challenges in Computing. GranDIHC-BR is our proposal to prospect during IHC2012 research questions in the field of Human-Computer Interaction that will be important to science and society over a period of 10 years, extending the reach of the SBC Challenge 4.
Research Interests:
Research Interests:
Abstract Social software have been triggering transformations that are changing the way people relate, use and are affected by technology. The opportunities and challenges brought by this kind of interactive systems require traditional... more
Abstract Social software have been triggering transformations that are changing the way people relate, use and are affected by technology. The opportunities and challenges brought by this kind of interactive systems require traditional methods of design and evaluation to be rethought and new concepts, such as human and technical values, be considered in computing systems. This paper presents a discussion on the concept of social software and places this kind of system in the context of human and technical values. As ...
Abstract In the last few years the Web has evolved from an environment for the publication and access of static pages to a platform of applications and to a complex and powerful communication environment. The Web 2.0 allowed the... more
Abstract In the last few years the Web has evolved from an environment for the publication and access of static pages to a platform of applications and to a complex and powerful communication environment. The Web 2.0 allowed the development of more interactive and innovative applications, collaborating for the appearance of the so called Social Web: a Web that connects people instead of pages. In this paper, we discussed about Web 2.0 and Social Web and propose the accomplishment of a Workshop to the presentation and ...
Research Interests:
ABSTRACT The challenge of designing universal access to knowledge demands considerations on multi-device interaction. A systematic review of inclusive environments built from multiple devices was conducted based on studies published... more
ABSTRACT The challenge of designing universal access to knowledge demands considerations on multi-device interaction. A systematic review of inclusive environments built from multiple devices was conducted based on studies published during the period of 2002–2013. The search strategy combined manual and automatic searches from which 8889 studies were identified; 34 studies were found proposing software tools for building multi-device inclusive environments (0.38 % of the original sample). Thus, this study analyzes the ways academic and industrial communities have developed tools for building inclusive environments. The main findings of this review are: (1) an urgent need for the recognition of accessibility as an important non-functional requirement; (2) a need for taking into account the social conditions of users, such as illiteracy and people living in underserved communities; and (3) the identification of new research questions in the context of multi-device inclusive environments.
Research Interests:
Making design has become a challenging activity, in part due to the increasingly complexity of the context in which designed solutions will be inserted. Designing iDTV applications is specially demanding because of the scarce theoretical... more
Making design has become a challenging activity, in part due to the increasingly complexity of the context in which designed solutions will be inserted. Designing iDTV applications is specially demanding because of the scarce theoretical and practical references, problems that are inherent to the technology, and its social and pervasive aspects. In this paper, we investigate the design for iDTV by proposing three participatory practices for supporting a situated design and evaluation of iDTV applications. A case study reports the use of the practices in the real context of a Brazilian broadcasting company, aiming at developing an overlaid iDTV application for one of its TV shows. The practices were articulated in a situated design process that favored the participation of important stakeholders, supporting different design activities: from the problem clarification and organization of requirements to the creation and evaluation of an interactive prototype. The results suggest the pr...
Com a abundância de informação disponível na Web e a necessidade de filtrá-la em quantidade compatível com a atenção limitada do ser humano, recursos de busca avançada tornam-se uma opção para essa tarefa. Entretanto, sua utilização é... more
Com a abundância de informação disponível na Web e a necessidade de filtrá-la em quantidade compatível com a atenção limitada do ser humano, recursos de busca avançada tornam-se uma opção para essa tarefa. Entretanto, sua utilização é baixa por não ser contextualizada e intuitiva. Este trabalho investiga aspectos de Information Seeking e Pesquisa Exploratória para fundamentar um modelo conceitual para ferramentas que permitam ao usuário expressar melhor suas consultas de forma incremental com recursos de busca avançada. O modelo será avaliado por especialistas e posteriormente instanciado em uma ferramenta de Pesquisa Exploratória que será avaliada empiricamente por usuários.
ABSTRACT Interactive Digital TV (iDTV) is a technology that has many challenges that surround it and that may discourage the passive viewers to interact with TV. To face the challenging scenario of designing for iDTV, we draw on the... more
ABSTRACT Interactive Digital TV (iDTV) is a technology that has many challenges that surround it and that may discourage the passive viewers to interact with TV. To face the challenging scenario of designing for iDTV, we draw on the Social Aware Computing (SAC) approach to design, looking at the problem and proposing solutions on various abstraction levels (informal, formal and technical) according to the viewpoint of different stakeholders, including prospective end users. This paper presents a motivational analysis conducted through Analytical and Empirical evaluations and Questionnaires, to understand whether and how an iDTV application designed through the SAC motivates users to interact with it. As results, our analysis pointed out application features that are likely to motivate users to interact, and features that emerged during the design process and were reflected on the application prototype. Moreover, we discuss whether and how the SAC design process may support iDTV applications that make sense to users and motivate them to interact.
ABSTRACT Interactive Digital TV (iDTV) is an emerging technology in Brazil, with inherent characteristics that must be addressed and which demand technical resources and references to support the design and development of interactive... more
ABSTRACT Interactive Digital TV (iDTV) is an emerging technology in Brazil, with inherent characteristics that must be addressed and which demand technical resources and references to support the design and development of interactive applications. This paper presents a design activity that reports and discusses the use of specific design patterns combined with prototyping tools and techniques inspired by Participatory Design in the design of applications for iDTV. Results are presented and discussed focusing on: the advantages of using design patterns in a participatory design, the main difficulties the groups had during the design activities, the importance of tools to support the design of iDTV applications.
Research Interests: Design Patterns and HCI
ABSTRACT Values and cultural aspects must be considered for providing design solutions that make sense to people. Although there is influential literature work devoted to the subject of values and culture in design, there is still a lack... more
ABSTRACT Values and cultural aspects must be considered for providing design solutions that make sense to people. Although there is influential literature work devoted to the subject of values and culture in design, there is still a lack of principled and light-weighted artifacts and methods to support designers in this task. In this paper we propose two artifacts for supporting designers in making explicit both stakeholders’ values and system’s requirements in design. We situate our discussion in a case study where the artifacts were used to support the design of seven prototypes of applications for Interactive Digital Television in the Brazilian context. The results were promising and indicated the artifacts’ usefulness to support designers in dealing with values and cultural aspects in design activities.
Cultural aspects such as values, beliefs, and behavioral patterns influence the way technology is understood and used, and the impact it may cause on the environment and on people. Although there is influential literature devoted to the... more
Cultural aspects such as values, beliefs, and behavioral patterns influence the way technology is understood and used, and the impact it may cause on the environment and on people. Although there is influential literature devoted to the subject of values and culture in Human-Computer Interaction, there is still a lack of principled and practical artifacts and methods to support researchers and practitioners in their activities. In this paper, we present a Value-oriented and Culturally Informed Approach (VCIA) to sensitize and support Computer Science and Engineering professionals in taking values and culture into consideration throughout the design of interactive systems. The approach is grounded on theoretical and methodological bases of Organizational Semiotics, Building Blocks of Culture, and Socially Aware Computing. VCIA offers a set of artifacts and methods articulated to support the design process in its different stages and activities: from the identification of stakeholders and their values, to the organization of requirements and the evaluation of the designed solution. In this paper, we present VCIA's principles, artifacts, and illustrate its usefulness in bringing values into consideration, supporting a socially aware system design.
Research Interests:
ABSTRACT Este artigo apresenta o relato de uma experiência no ensino de IHC em um curso de Especialização em Engenharia de Software. Neste curso, todas as disciplinas se comunicam direta ou indiretamente por meio de um projeto comum no... more
ABSTRACT Este artigo apresenta o relato de uma experiência no ensino de IHC em um curso de Especialização em Engenharia de Software. Neste curso, todas as disciplinas se comunicam direta ou indiretamente por meio de um projeto comum no qual devem ser aplicadas as atividades práticas de cada disciplina. A disciplina de IHC, com 24 horas, visa capacitar os alunos no entendimento dos usuários e de suas necessidades e na prototipação de soluções. Os alunos, profissionais atuantes na indústria, normalmente não possuem contato prévio com a área de IHC, reforçando a responsabilidade da disciplina na formação profissional e na clarificação/disseminação de IHC enquanto área de atuação. Este artigo relata o modo como a disciplina foi trabalhada, as técnicas e ferramentas utilizadas, e apresenta os resultados de duas avaliações sobre a disciplina que indicam a sua aceitação por parte dos alunos.
Research Interests:
ABSTRACT Este Relatório Técnico apresenta os resultados da iniciativa dos Grandes Desafios de Pesquisa em IHC no Brasil (GranDIHC-BR) para o período 2012-2022. Os Cinco Grandes Desafios identificados foram: 1. Futuro, Cidades Inteligentes... more
ABSTRACT Este Relatório Técnico apresenta os resultados da iniciativa dos Grandes Desafios de Pesquisa em IHC no Brasil (GranDIHC-BR) para o período 2012-2022. Os Cinco Grandes Desafios identificados foram: 1. Futuro, Cidades Inteligentes e Sustentabilidade; 2. Acessibilidade e Inclusão Digital; 3. Ubiquidade, Multiplos Dispositivos e Tangibilidade; 4. Valores Humanos; 5. Formação em IHC e Mercado O GranDIHC-BR foi realizado em 2012, contou com a colaboração de vários pesquisadores e profissionais da indústria, e participação massiva da comunidade em um painel realizado no IHC 2012, em Cuiabá. O relatório técnico situa a iniciativa do GranDIHC-BR no contexto dos Grandes Desafios de Pesquisa em Computação propostos pela SBC em 2006. Além de 5 Grandes Desafios, o relatório apresenta uma explicação sobre o modo como toda a iniciativa foi organizada e conduzida, bem como um resumo das propostas individuais que serviram como base para a identificação e proposição dos Grandes Desafios em IHC.
This chapter is an attempt to better understand government perceptions on the adoption of technology-based service channels, in particular, digitalized administration processes. A model is proposed that combines the effect of behavioral... more
This chapter is an attempt to better understand government perceptions on the adoption of technology-based service channels, in particular, digitalized administration processes. A model is proposed that combines the effect of behavioral beliefs and intentions together with research variables, perceived usefulness of e-services, subjective norms, self-efficacy, technology facilitating conditions, trust and perceived risk, as well as individual characteristics. The research method uses a questionnaire to query the intentions of government civil service employees towards adopting digitalized services. Structural Equation Modeling is applied to further analyze the data and to design a theoretical model predicting the intention to accept e-services in e-government. Results from 216 civil servants working in five cities and counties reveal trust as the most influential factor directly affecting behavioral intention towards administering digitalized services. The high trust of civil servan...
ABSTRACT In recent years new forms of interaction have been proposed by academia and industry for the contexts of use of interactive Digital Television (iDTV) and games. One of these proposals is called Adjustable Interactive Rings... more
ABSTRACT In recent years new forms of interaction have been proposed by academia and industry for the contexts of use of interactive Digital Television (iDTV) and games. One of these proposals is called Adjustable Interactive Rings (AIRs), which is a technology resulting from a research project that was originally designed to be used with iDTV applications. Taking into account the design features of the physical artifact of interaction developed, it seems possible to conjecture its use in other contexts then the iDTV. In this paper, we present preliminary results of an experiment conducted with users in order to investigate the suitability of AIRs in the context of playing computer games.
Social software is a growing reality worldwide, while the analysis and evaluation of this kind of system still is a quite unexplored challenge. The complex scenario of social software has been marked by the diversity of users, their... more
Social software is a growing reality worldwide, while the analysis and evaluation of this kind of system still is a quite unexplored challenge. The complex scenario of social software has been marked by the diversity of users, their limitations, preferences, cultural aspects such as values, beliefs, customs and so on. This paper sheds light on this scenario proposing a culturally aware artifact to support designers in the task of analyzing and evaluating social software, taking values and other cultural issues into account in an explicit way. The ...
Research Interests:
ABSTRACT Knowledge production in the Social Web can be understood as a dynamic socio-cultural process. Mechanisms that support users to explore this knowledge in an effective and efficient way may bring various benefits. However, the... more
ABSTRACT Knowledge production in the Social Web can be understood as a dynamic socio-cultural process. Mechanisms that support users to explore this knowledge in an effective and efficient way may bring various benefits. However, the construction of these interaction mechanisms depends on further research on multidisciplinary fields. The interpretation of the content by users is influenced by meanings and intentions, as well as by the understanding of the evolution of these aspects over time. This paper analyses the evolution of meaning and intentions in collaborative problem solving. The analysis is informed by Semiotics and Speech Act theories. From this analysis, the paper proposes a conceptual framework for multidisciplinary research in three interconnected perspectives: interactive, conceptual and technical.
Abstract The evolution and dissemination of technology have been triggering transformations that are changing the way people interact, react, behave and live. Our world is being strongly shaped by technological development and, while it... more
Abstract The evolution and dissemination of technology have been triggering transformations that are changing the way people interact, react, behave and live. Our world is being strongly shaped by technological development and, while it has brought benefits to the human and planet's life, it has also caused negative impacts on them. In the last years, the issue of sustainability has drawn attention to the way how technology can both help and harm the planet's life, and some researchers are discussing on possible ways of ...
Research Interests:
Research Interests:
Research Interests:
As interactive systems have left the context of offices and workplaces to pervade every aspect of people's personal and social lives, evaluating these systems is becoming an increasingly complex challenge. Issues that range from... more
As interactive systems have left the context of offices and workplaces to pervade every aspect of people's personal and social lives, evaluating these systems is becoming an increasingly complex challenge. Issues that range from emotional and affective aspects, sociability, and human values, to scalability, security, and performance, are now in play. This situation is very different from all designers and researchers have experienced before. In this paper we focus on the evaluation of interactive systems in the context of the third HCI ...