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13th Symposium on computing Systems, WSCAD-SSC 2012

作者： Vianna, Henrique Barbosa, Jorge Costa, Cristiano Yamin, Adenauer C. Applied Computing Graduate Program - PIPCA UNISINOS São Leopoldo Brazil Computer Science - Polytechnic Center UCPEL Pelotas Brazil

ISBN: (纸本)9780769548470

Accordingly with the World Health Organization, heart disease, chronic respiratory diseases, cancer and diabetes are the most common chronic diseases and one of the leading causes of the mortality in the world. In such cases we need more than patient engagement to help to control of the disease, community and health organizations support is also desirable. These roles must support the patients' self-management activities, making them feel confident and motivated. This support can be accomplished by ubiquitous computing. The ubiquitous computing gives conditions to help chronic diseases patients in the management of their activities, offering support to them anytime, anywhere. In this context, this article presents U'Ductor, a model for supporting ubiquitous chronic care management, whose goal is to help the integration between patient and community resources. The U'Ductor gives a step forward in relation to the studied related works by integrating patients, community resources and community members. Those features were not completely explored in the studied works in the way we employ in U'Ductor. An implementation of the model was evaluated by a chronic patient, which gave a positive feedback about it. © 2012 IEEE.

关键词： Ubiquitous computing

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A proposal of a mobile payment system based on android

A proposal of a mobile payment system based on android

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6th International Conference on Innovative Mobile and Internet Services in Ubiquitous computing, IMIS 2012

作者： Roehrs, Alex Da Costa, Cristiano André Barbosa, Jorge Luis Victória Applied Computing Graduate Program - PIPCA Universidade Do Vale Do Rio Dos Sinos - UNISINOS Sáo Leopoldo RS Brazil

ISBN: (纸本)9780769546841

This paper aims at presenting an architectural model proposal for a novel Mobile Payment System, called 4iPay. This work considers the following premises: independence of device, location, carrier and cardholder to meet the needs of executing payment transactions in ubiquitous commerce. Our proposal considers the convergence of concepts of ubiquity, unity, universality and unison to form the proposed model. This article describes the model, implementation, preliminary assessments and requirements for mobile payment in ubiquitous environments. We developed a prototype of 4iPay using Android smart phones. The prototype was evaluated in three different scenarios. © 2012 IEEE.

关键词： Android (operating system)

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An ontology-based repository for a spontaneous social network

An ontology-based repository for a spontaneous social networ...

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2011 International Conference on Computational Aspects of Social Networks, CASoN'11

作者： Silva, Bryan Garber Da Costa, Cristiano André Da Zaupa, Dante Freitas, Gustavo Universidade Do Vale Do Rio Dos Sinos - UNISINOS São Leopoldo Brazil Applied Computing Graduate Program - PIPCA Universidade Do Vale Do Rio Dos Sinos - UNISINOS São Leopoldo Brazil

ISBN: (纸本)9781457711312

With the latest technological advancements and the popularization of mobile devices nowadays, software development has evolved towards mobility. One of the main uses of mobile devices is to access social networks. They are becoming important tools in people's life. In this context, the Mingle project has the objective of creating a spontaneous social networks that is mainly accessed by mobile devices, such as smartphones. Mingle uses the concepts of ubiquitous computing to create a notion of spontaneity, i.e, providing a social network adapted to the persons specific location. This article has the goal of presenting an ontology and the persistence model for managing the information inside a specific location (called "Cell" in our model). To evaluate our proposal, two technics were applied: lexical evaluation and application-level evaluation. The first assessment employs the Levenshtein edit distance and compares Mingle with other popular ontologies in the field, while the second one evaluates if we deal with all Mingle requirements. © 2011 IEEE.

关键词： Ontology

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Congestion control with ECN support in poll-based multicast protocols

Congestion control with ECN support in poll-based multicast ...

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IEEE Symposium on Computers and Communications (ISCC)

作者： M.P. Barcellos A. Detsch Post-graduate Program on Applied Computing PIPCA/UNISINOS Sao Leopoldo Rio Grande do Sul Brazil

Most of the traffic in the Internet nowadays is transmitted using TCP, or transport control protocol. The stability of the Internet depends on the congestion control being performed by this protocol, as well as equivalent mechanisms employed by other protocols. The ECN technique (explicit congestion notification), in which packets forwarded by routers are marked whenever congestion is about to occur (or already occurring), allows a transmitter to reduce the sending rate accordingly without relying on packet drops. ECN has not been fully explored, particularly regarding multicast protocols. This paper presents models of poll-based reliable multicast protocols and extends them with a new single-rate congestion control mechanism that harnesses ECN. Simulation results show that it provides fairness between flows from multiple sources, and is TCP-friendly. Further, they demonstrate the substantial efficiency gain obtained with the use of ECN in multicast.

关键词： Multicast protocols Sliding mode control Internet Transport protocols Multicast algorithms Scalability Signal generators Stability Transmitters Grid computing

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U'Ductor: A Model for Supporting Ubiquitous Chronic Disease Care Management

U'Ductor: A Model for Supporting Ubiquitous Chronic Disease ...

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Simpasio em Sistemas Computacionais (WSCAD-SSC)

作者： Henrique Vianna Jorge Barbosa Cristiano Costa Adenauer C. Yamin Applied Computing Graduate Program-PIPCA UNISINOS Sao Leopoldo Brazil Computer Science-Polytechnic Center UCPEL Pelotas Brazil

关键词： Monitoring Middleware Biomedical monitoring Computational modeling Diseases Communities Diabetes

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Analyzing Performance of the Parallel-based Fractal Image Compression Problem on Multicore Systems

Analyzing Performance of the Parallel-based Fractal Image Co...

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The 2013 AASRI Conference on Parallel and Distributed computing and Systems(DCS 2013)

作者： Roberto de Quadros Gomes Vladimir Guerreiro Rodrigo da Rosa Righi Luiz Gonzaga da Silveira Jr. JinyoungYang Applied Computing Graduate Program-PIPCA-UNISINOS-Unisinos Avenue 950 Korean Advanced Institute of Science and Technology-KAIST-291 Daehak-ro

Both the size and the resolution of images always were key topics in the graphical computing ***,they become more and more relevant in the big data *** can observe that often a huge amount of data is exchanged by medium/low bandwidth networks or yet,they need to be stored on devices with limited space of *** this context,the present paper shows the use of the Fractal method for image *** is a lossy method known by providing higher indexes of file reduction through a highly time consuming *** this way,we developed a model of parallel application for exploiting the power of multiprocessor architectures in order to get the Fractal method advantages in a feasible *** evaluation was done with different-sized images as well as by using two types of machines,one with two and another with four *** results demonstrated that both the speedup and efficiency are highly dependent of the number of *** emphasized that a large number of threads does not always represent a better performance.

关键词： Parallel programing Fractal Coding Multicore architectures Parallel modeling Threads Performance analysis

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A Proposal of a Mobile Payment System Based on Android

A Proposal of a Mobile Payment System Based on Android

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International Conference on Innovative Mobile and Internet Services in Ubiquitous computing (IMIS)

作者： Alex Roehrs Cristiano André da Costa Jorge Luis Victória Barbosa Applied Computing Graduate Program-PIPCA Universidade do Vale do Rio dos Sinos (UNISINOS) Sao Leopoldo Rio Grande do Sul Brazil

ISBN: (纸本)9781467313285

关键词： Mobile communication Mobile handsets Security Proposals Performance evaluation Servers

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Mingle spontaneous social network

Mingle spontaneous social network

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International Conference on Computational Aspects of Social Networks, CASON

作者： Dante Zaupa Cristiano André da Costa Jéssica Silva Jorge Barbosa Adenauer Yamin Applied Computing Graduate Program - PIPCA University of Vale do Rio dos Sinos - UNISINOS São Leopoldo Brazil Graduate Program in Computer Science - PPGC Federal University of Pelotas - UFPEL Pelotas Brazil

Social networks provide a new way of communication that still preserves our human social interaction. Due to the widespread use of mobile devices, people tend to use their smartphone or tablet as the main way to make that interaction. Furthermore, applications developed to these devices are fostering the use of contextual information, such as the location of the user. In this way, this article proposes Mingle, a model for a spontaneous social network targeted at mobile devices. In our proposal, the social network is spontaneous, i.e. involves only people that are physically present in a specific location. Besides presenting the model, we show a developed prototype using Android-based devices. We evaluated Mingle employing two strategies, a usage case and a performance evaluation. The results were encouraging and show the potential of deploying Mingle in real situations.

关键词： Social network services Servers Computer architecture Mobile handsets Microprocessors Ontologies Telecommunication traffic

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Analyzing Performance of the Parallel-based Fractal Image Compression Problem on Multicore Systems

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AASRI Procedia 2013年 5卷 140-146页

作者： Roberto de Quadros Gomes Vladimir Guerreiro Rodrigo da Rosa Righi Luiz Gonzaga da Silveira Jinyoung Yang Applied Computing Graduate Program –PIPCA - UNISINOS–Unisinos Avenue 950 São Leopoldo RS Brazil Korean Advanced Institute of Science and Technology –KAIST – 291 Daehak-ro Yuseong-gu Daejeon 305-701South Korea

Both the size and the resolution of images always were key topics in the graphical computing area. Especially, they become more and more relevant in the big data era. We can observe that often a huge amount of data is exchanged by medium/low bandwidth networks or yet, they need to be stored on devices with limited space of memory. In this context, the present paper shows the use of the Fractal method for image compression. It is a lossy method known by providing higher indexes of file reduction through a highly time consuming phase. In this way, we developed a model of parallel application for exploiting the power of multiprocessor architectures in order to get the Fractal method advantages in a feasible time. The evaluation was done with different-sized images as well as by using two types of machines, one with two and another with four cores. The results demonstrated that both the speedup and efficiency are highly dependent of the number of cores. They emphasized that a large number of threads does not always represent a better performance.

关键词： Parallel programing Fractal Coding Multicore architectures Parallel modeling Threads Performance analysis

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An ontology-based repository for a spontaneous social network

An ontology-based repository for a spontaneous social networ...

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International Conference on Computational Aspects of Social Networks, CASON

作者： Bryan Garber da Silva Cristiano André da Costa Dante Zaupa Gustavo Freitas Universidade do Vale do Rio dos Sinos - UNISINOS São Leopoldo Brazil Applied Computing Graduate Program - PIPCA Universidade do Vale do Rio dos Sinos - UNISINOS São Leopoldo Brazil CNPq Technological and Inovation Fellow Universidade do Vale do Rio dos Sinos – UNISINOS São Leopoldo Brazil Universidade do Vale do Rio dos Sinos – UNISINOS São Leopoldo Brazil

With the latest technological advancements and the popularization of mobile devices nowadays, software development has evolved towards mobility. One of the main uses of mobile devices is to access social networks. They are becoming important tools in people's life. In this context, the Mingle project has the objective of creating a spontaneous social networks that is mainly accessed by mobile devices, such as smartphones. Mingle uses the concepts of ubiquitous computing to create a notion of spontaneity, i.e, providing a social network adapted to the persons specific location. This article has the goal of presenting an ontology and the persistence model for managing the information inside a specific location (called “Cell” in our model). To evaluate our proposal, two technics were applied: lexical evaluation and application-level evaluation. The first assessment employs the Levenshtein edit distance and compares Mingle with other popular ontologies in the field, while the second one evaluates if we deal with all Mingle requirements.

关键词： Ontologies Social network services Prototypes Servers Knowledge based systems Mobile handsets Libraries

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