Browsing by Author "Ochoa, Sergio F."

Now showing 1 - 12 of 12
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    A Patterns System to Coordinate Mobile Collaborative Applications
    (2011) Neyem, Andres; Ochoa, Sergio F.; Pino, Jose A.
    Advances in wireless communication technologies and mobile computing devices open new possibilities to carry out computer-supported mobile collaborative work. However this opportunity brings also a number of challenges to designers, since collaborative applications supporting mobile activities involve requirements which are not present in stationary collaboration scenarios. For example, mobile collaborative applications should not use centralized components because it jeopardizes the autonomy required by mobile workers. In order to help designers to deal with these new requirements, this article presents a patterns system focused on the coordination support required for mobile collaborative work. Such patterns represent reusable designs that help reduce design risks, cost and time. The article also presents three mobile collaborative applications in which proposed patterns were included in their respective designs.
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    A reusable structural design for mobile collaborative applications
    (ELSEVIER SCIENCE INC, 2012) Neyem, Andres; Ochoa, Sergio F.; Pino, Jose A.; Dario Franco, Ruben
    Architecting mobile collaborative applications has always been a challenge for designers. However, counting on a structural design as a reference can help developers to reduce risks and efforts involved in system design. This article presents a reusable architecture which helps modeling the communication and coordination services required by mobile collaborative applications to support collaboration among users. This architecture has been used as a basis for the design of several mobile systems. Two of them are presented in this article to show the applicability of the proposal to real world collaborative systems. (C) 2011 Elsevier Inc. All rights reserved.
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    COMMUNICATION SUPPORT FOR MOBILE COLLABORATIVE WORK: AN EXPERIMENTAL STUDY
    (WORLD SCIENTIFIC PUBL CO PTE LTD, 2012) Messeguer, Roc; Medina, Esunly; Ochoa, Sergio F.; Pino, Jose A.; Neyem, Andres; Navarro, Leandro; Royo, Dolors
    Advances in mobile computing and wireless communication are easing the evolution from traditional nomadic work to computer-mediated mobile collaborative work. Technology allows efficient and effective interaction among mobile users and also provides access to shared resources available to them. However, the features and capabilities of the communication infrastructure supporting these activities influence the type of coordination and collaboration employed by mobile collaborative applications in real work scenarios. Developers of these applications are typically unaware of the constraints the communication infrastructure imposes on mobile collaborative systems, because they are not easy to foresee. That leads to a high probability of communication problems in otherwise fully functional mobile collaborative support applications. This paper presents an experimental study with real devices and networks on a realistic physical environment that shows how ad hoc networks can effectively support mobile collaborative work and the practical limitations. The paper analyzes several networking issues and determines how they influence mobile collaborative work in various interaction scenarios. The paper also presents the lessons learned in the study and provides recommendations to deal with some networking issues related to real-world ad hoc networks.
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    Identifying Groupware Requirements in People-Driven Mobile Collaborative Processes
    (2019) Herskovic, Valeria; Ochoa, Sergio F.; Pino, José A.
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    Identifying the Awareness Mechanisms for Mobile Collaborative Applications
    (2013) Herskovic, Valeria; Ochoa, Sergio F.; Pino, José A.; Antunes, Pedro; Ormeño, Emilio
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    Increasing shared information availability during urban emergency responses
    (IEEE, 2011) Monares, Álvaro; Herskovic, Valeria; Suárez, David; Ibarra, Manuel; Ochoa, Sergio F.; Pino, José A.
    Firefighters are responsible for dealing with several types of urban emergencies, such as fires, car crashes and explosions. The participants in an emergency response process require shared information to make effective, on-time decisions, and to coordinate their activities. The information sharing process is currently performed using message exchange through a radio system. However, limitations in this communication medium jeopardize information availability during the emergency. This may produce undesirable situations, such as lack of coordination among firefighters or wrong decisions due to lack of supporting information. As a way to deal with the problem, this article proposes a computer-based system, which complements the radio system. The system helps increase the availability of the information that is most frequently requested by firefighters in the field, identified by a study of 65 past emergencies. The results of a preliminary evaluation indicate the solution is able to ensure the availability of at least the 30% of the most requested information during an emergency.
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    LACCIR: A collaborative research initiative for ICT development in Latin America and the Caribbean
    (IEEE, 2012) Casas Raposo, Ignacio Antonio; Leiva Gutierrez, Claudia Andrea; Ochoa, Sergio F.; Pino, José A.; Puente, Jaime
    Collaboration in scientific research is vital not only to generate leverage between research teams, but also to help validate and generalize the research outcomes and its transfer to the society at large. Within a geographical region, scientific collaboration also allows researchers to address common problems and opportunities for that region. Thus, regional scientific collaboration becomes a possible source of solutions for its own social and economic needs. Posed to deal with this challenge, the LACCIR Federation was created in May 2007 with the participation of a selected group of universities, private enterprises, regional organizations and local government agencies from Latin America and the Caribbean (LAC). LACCIR promotes collaboration on ICT research focused on applications for social and economic needs that are common through the LAC region. This paper describes the LACCIR initiative, its main activities and its achievements to date.
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    Mobile computing in urban emergency situations Improving the support to firefighters in the field
    (PERGAMON-ELSEVIER SCIENCE LTD, 2011) Monares, Alvaro; Ochoa, Sergio F.; Pino, Jose A.; Herskovic, Valeria; Rodriguez Covili, Juan; Neyem, Andres
    Communication support is a serious limitation for Latin American firefighters when they deal with emergency situations The insufficient number of radio channels and the impossibility to deliver digital information force firemen to improvise during response processes e g to make decisions using their experience and poor or null supporting information These improvised actions affect the time required to take control of an emergency and also affect the evolution of the crisis situation Provided most of Latin American fire companies are volunteer organizations communication solutions that could help to overcome these problems are usually expensive for them This article presents a low-cost mobile collaborative application which may be used in emergency situations to overcome most of the firefighters communication problems The application named MobileMap is the result of the research and development work conducted by the authors supported by a Chilean fire company during the last three years MobileMap allows ad hoc communication decisions support and collaboration among firefighters in the field using mobile devices This solution complements the radio communication systems Since the Inter actions supported by MobileMap are recorded it is possible to analyze such information after the crisis and learn for future emergencies The tool was evaluated in simulated and real scenarios and the obtained results are highly encouraging (C) 2010 Elsevier Ltd All rights reserved
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    Modeling a Collaborative Answer Negotiation Activity Using IMS-Based Learning Design
    (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2009) Valdivia, Ricardo; Nussbaum, Miguel; Ochoa, Sergio F.
    This paper describes the design and impact of a face-to-face Computer Supported Collaborative Learning activity named Collaborative Answer Negotiation Activity (CANA). CANA primarily involves face-to-face interactions among students supported by wirelessly interconnected mobile devices to solve collaboratively a set of multiple-choice questions. The learning outcomes of a CANA applied in two computer science courses are presented. Better results were obtained in a course where reasoning and deduction capacities were important than there were in a technical one where students were required to learn specific knowledge and apply it. A CANA design is described that will permit its reuse in various instructional scenarios. This design is defined as a collaborative learning activity pattern and is specified using IMS Learning Design, an established method of learning scenario description. The application of this method revealed the need to incorporate the notion of Joint Problem Space, a shared knowledge space that supports the collaborative work of the activity.
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    StraightenUp: Implementation and evaluation of a spine posture wearable
    (2017) Cajamarca, María Gabriela; Rodríguez, Iyubanit; Herskovic, Valeria; Campos Daziano, Mauricio Andrés; Ochoa, Sergio F.; Singh, Pritpal; Bravo, José
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    The Iceberg Effect: Behind the User Interface of Mobile Collaborative Systems
    (GRAZ UNIV TECHNOLGOY, INST INFORMATION SYSTEMS COMPUTER MEDIA-IICM, 2011) Herskovic, Valeria; Ochoa, Sergio F.; Pino, Jose A.; Neyem, Andres
    Advances in mobile technologies are opening new possibilities to support collaborative activities through mobile devices. Unfortunately, mobile collaborative systems have been difficult to conceive, design and implement. These difficulties are caused in part by their unclear requirements and developers' lack of experience with this type of systems. However, several requirements involved in the collaborative back-end of these products are recurrent and should be considered in every development. This paper introduces a characterization of mobile collaboration and a framework that specifies a list of general requirements to be considered during the conception and design of a system in order to increase its probability of success. This framework was used in the development of two mobile collaborative systems, providing developers with a base of back-end requirements to aid system design and implementation. The systems were positively evaluated by their users.
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    Understanding presence awareness information needs among engineering students
    (IEEE, 2012) Herskovic Maida, Valeria Paz; Neyem, Hugo Andrés; Ochoa, Sergio F.; Pino, José A.; Antunes, Pedro
    The flexibility and changing nature of loosely coupled work makes presence awareness crucial to promote interactions among collaborators. Undergraduate students, in their efforts to accomplish coursework-related tasks, must deal with having several available channels to interact with others, accessing and sharing educational material, and the need to optimize their time. Most of them work in a loosely coupled way as the main strategy to reduce the effort spent in the educational process. Presence awareness may help them achieve interactions among potential collaborators in this scenario. This paper aims to identify the most suitable presence awareness information to promote on-demand interactions among college students. A study was conducted for this purpose, involving undergraduate engineering students from two universities in Chile. This article also presents a classification of presence awareness mechanisms for loosely-coupled mobile group work.