Browsing by Author "Ochoa, Sergio"

Now showing 1 - 3 of 3
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    MobileMap: A collaborative application to support emergency situations in urban areas
    (IEEE, 2009) Monares, Alvaro; Ochoa, Sergio; Pino, Jose; Herskovic, Valeria; Neyem, Hugo Andres
    One of the problems affecting fire departments in Latin America is the lack of a strong infrastructure to overcome their communication problems. Because these organizations are mainly volunteer and receive minimal support from government agencies, most existing solutions are not applicable for them. This article presents a low-cost mobile groupware application, which may be used in emergency situations to overcome the firefighters' communication problems. The tool, named MobileMap, allows exchanging textual and graphical information using mobile devices. Therefore, this solution complements the frequently over-used radio communication systems. This tool was evaluated in a simulated and a real scenario; the obtained results are highly encouraging.
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    Modeling interactions in human-centric wireless sensor networks
    (IEEE, 2014) Monares, Älvaro; Ochoa, Sergio; Herskovic Maida, Valeria Paz; Santos, Rodrigo; Pino, José
    The recent growth of social networking and sensing applications has enabled people to perform crowd computing. In turn, this activity has opened several opportunities to address people's needs in various application areas, such as tourism, security, entertainment and emergency response. However, the design of these applications has also brought several challenges to software designers. Since users of these systems interact among them in heterogeneous physical scenarios, their interactions should be formally considered in the design of these applications in order to determine whether or not the services embedded in the system are suitable to support those interactions. The lack of guidelines to address this modeling issue not only jeopardizes the suitability of these applications, but also implies the services provided by the system can be evaluated only after implementation, which is clearly risky and expensive. This article proposes an initial modeling language that allows software designers to address this challenge through the representation of the interaction among users of a system. The interaction model represented using the proposed language allows designers to evaluate, at the design time, the information flow and the availability of interaction supporting services in the system. The usability and usefulness of the proposal are shown using a running example.
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    Some observations from the analysis of an online discussion board
    (IEEE, 2012) Ochoa, Sergio; Pino, José; Baloian, Nelson; Antunes, Pedro; Herskovic Maida, Valeria Paz
    Many educators and educational institutions include an online discussion forum in the content management system supporting their courses, because they think such tool facilitates the instructional process. It could be true if we explicitly design the instructional process to take advantage of this tool, but to do so we have to better understand how users actually use online discussion boards. Trying to answer such a question this paper presents a study of discussions occurring in several undergraduate courses in computer science offered by the University of Chile. More specifically, the study was based on the semantic analysis of a representative set of messages registered in eight different courses occurring in a period of two years. The obtained results indicate that the users do not perceive the forum as a learning tool, but as a communication platform that allows them to socialize and address coordination and operative issues related with the courses.