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18th IEEE Symposium on Computers and Communications, ISCC 2013

作者： Schunke, Luana Carine De Oliveira, Luiz Paulo Luna Villamil, Marta Becker Applied Computing Graduate Program University of Vale Do Rio Dos Sinos-Unisinos S˜ao Leopoldo-RS Brazil

ISBN: (纸本)9781479937554

Participatory cities are those that allow the participation of citizens in the construction and improvement of their common daily life. In this work we present a tool for that participation, allowing the citizens to register the occurrences as well as take knowledge about the global geographic status of their city in on a variety of contexts (security, transit, etc.). However, a tool like that, fed by the people, certainly will deal with a large amount of information, distributed geographically. To accomplish that, a precise criterion for visualizing the resultant density distribution of occurrences must be used. In this paper, we also propose an automatic method for that visualization based on Voronoi Diagrams. The Voronoi polygons divide the region according to the concentration of occurrences. In this scheme, the area of each Voronoi polygon defines the density of the occurrences of the specific categories which are shown in the city map in color and transparency intensities for visualization. This can easily reveal the space distribution of important issues, in a variety of contexts such as criminality, commercial and industrial activities, drugs traffic, illumination concerns, and others. © 2013 IEEE.

关键词： Visualization

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Dealing with standard and reverse motion of multi-legged robots joints

Dealing with standard and reverse motion of multi-legged rob...

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10th International Conference on Informatics in Control, Automation and Robotics, ICINCO 2013

作者： Llantada, Alan Gómez, Arthur Tórgo Villamil, Marta Becker Universidade do Vale do Rio dos Sinos Applied Computing - Graduate Program Av. Unisinos 950 Sao Leopoldo RS Brazil

ISBN: (纸本)9789898565716

Modelling of articulated figures such as simple hierarchical relationships are suitable for most cases of animation. Typically, for the representation of human and animal figures, a tree topology is sufficient. But complex high-dimensional articulated structures with many end-effectors and the movement that can be generated in any joint in any direction, are extremely complex to model. Multi-legged robots made to attend applications which needs the extreme versatility to climb or move into places of very difficult access are more efficient if its joints can perform motion at standard and reverse direction, its segments can be moved by more than one joint and any of its joints can be the root of the motion chain. This article presents an approach to deal with these gaps in modeling the motion topology of legged-robots based on rotation of joints references frames. We also present an aplication of an hybrid algorithm based on Genetic Algorithm and Tabu Search to find a good quality solution to the robot motion sequences.

关键词： Genetic algorithms

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GUGA: A tool for participatory cities

GUGA: A tool for participatory cities

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IEEE Symposium on Computers and Communications (ISCC)

作者： Luana Carine Schünke Luiz Paulo Luna de Oliveira Marta Becker Villamil Applied Computing Graduate Program University of Vale do Rio dos Sinos - Unisinos São Leopoldo RS Brazil Applied Computing Graduate Program University of Vale do Rio dos Sinos - Unisinos São Leopoldo Brazil

关键词： Cities and towns Data visualization Registers Government Social network services Visualization Color

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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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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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Methodology for Acquisition of Intensity Data in Forest Targets Using Terrestrial Laser Scanner

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IERI Procedia 2013年 5卷 238-244页

作者： Fabiane Bordin Elba Calesso Teixeira Sílvia Beatriz Alves Rolim Francisco Manoel Wohnrath Tognoli Maurício Roberto Veronez Luiz Gonzaga da Silveira Junior Camila Fernandes Natus de Souza Graduate Program in Remote Sensing Federal University of Rio Grande do Sul (UFRGS) Porto Alegre - RS Brazil Remote Sensing and Digital Cartography Laboratory (LASERCA) University of Vale do Rio dos Sinos (UNISINOS) São Leopoldo-RS Brazil State Foundation of Environmental Protection Luiz Henrique Roessler (FEPAM) Porto Alegre - RS Brazil Graduate Program in Geology University of Vale do Rio dos Sinos (UNISINOS) São Leopoldo-RS Brazil Graduate Program in Applied Computing University of Vale do Rio dos Sinos (UNISINOS) São Leopoldo-RS Brazil

The advance of technology and the availability of high-resolution and accurate systems have permitted the development of new methods for studies in forests. Terrestrial laser scanners have been consolidated as one of the most effective technologies for geospatial data acquisition since the last decade. They have offered the possibility of mapping tridimensionally with high positional accuracy a great number of targets, including forests. However, it is quite difficult to find methodological approaches for acquisition of forest data involving these type of systems. Thus, based on a mid and long range laser scanner with an electromagnetic spectrum ranging into the mid-infrared, 1535 nm, different distances and radiometric resolutions were tested in order to establish a method of acquisition of intensity data in forest targets. After processing, data were analyzed with a clustering algorithm to test the possibility of identifying different elements. Trunk, branches and leaves as well as an edge effect were satisfactorily grouped. Besides defining a method for acquisition of intensity, it opens good perspectives in terms of integrating the classification obtained by the clustering technique with the point cloud. Future studies can contribute to develop a method for quantifying the volume of forest elements and, consequently, estimate biomass.

关键词： Remote sensing Radiometric resolution Distance K-means algorithm LIDAR Mid-infrared Edge effect

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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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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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Modeling and visualizing individual and global trends of a multi-agent system

Modeling and visualizing individual and global trends of a m...

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9th International Conference on Informatics in Control, Automation and Robotics, ICINCO 2012

作者： Nonnenmacher, Vinicius Villamil, Marta Becker De Oliveira, Luiz Paulo Luna Applied Computing-Graduate Program Universidade Do Vale Do Rio Dos Sinos Av. Unisinos 950 São Leopoldo Brazil

ISBN: (纸本)9789898565211

This paper proposes a new model for real-time visualization of the social dynamics as a resultant of individual changes due to their mutual interactions. The model allows the dynamical visualization of both, the individual characteristics changes as well as the resultant system trends as a whole. As an application, we investigated the role of individual degrees of influence and the number of agents in the global choice of a population between two antagonistic options.

关键词： Multi agent systems

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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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