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Symposium on Virtual Reality (SVR)

作者： Juliana Patrícia Detroz Marcio Geovani Jasinski Rafaela Bosse Thiago Luiz Berlim Marcelo Da Silva Hounsell PPGCA-Graduate Program in Applied Computing UDESC-Santa Catarina State University Joinville Brazil UDESC - Santa Catarina State Univ. Brazil

Virtual Reality is becoming a mature technology field. To understand its origins and foresee strategies, a study on the last decade of papers published in the Brazilians' most prominent symposium (the SVR - Symposium on Virtual and Augmented Reality) has been carried out. Papers were classified according to language, international participants, areas and sub-areas of application and related technologies. Although oversees participants has proven not constant, papers published in English has proven stable to SVR editions. The study also shows that health related applications have received most of the attention although techniques and tools proposal have raised the most recently which could be related to the low-level programming languages and frameworks preferences. The number of Augmented Reality papers has grown steadily and a great variety of underlying knowledge fields (such as 3D interaction and real-time simulation) are persistent topics of interest. An expected shift from VRML to other 3D Web technologies have already happened but there are just a few research papers devoted to formulative, evaluative or descriptive approaches. Data show that by improving the research budget to the area could impact productivity, a centralized database of publications would facilitate recovering and analyzing past contributions and, that enforcing more scientifically rigorous and English-written papers could raise the quality and visibility of Brazilians' research in VR.

关键词： Augmented reality Three-dimensional displays Education Communities Avatars Real-time systems

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Monitoring Heat Waves and Their Impacts on Summer Crop Development in Southern Brazil

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Agricultural Sciences 2014年第4期5卷 353-364页

作者： Anibal Gusso Jorge Ricardo Ducati Mauricio Roberto Veronez Victor Sommer Luiz Gonzaga da Silveira Junior Environmental Engineering Vale do Rio dos Sinos University(UNISINOS)Sao LeopoldoBrazil Center for Remote Sensing and Meteorological Research Federal University of Rio Grande do Sul(UFRGS)Porto AlegreBrazil VizLab-Advanced Visualization Laboratory Vale do Rio dos Sinos University(UNISINOS)Sao LeopoldoBrazil Astronomy Department Federal University of Rio Grande do Sul(UFRGS)Porto AlegreBrazil Graduate Program in Geology Vale do Rio dos Sinos University(UNISINOS)Sao LeopoldoBrazil Crop Breeding Foundation(Fundacao Pró-Sementes) Passo FundoBrazil Graduate Program in Applied Computing Vale do Rio dos Sinos University(UNISINOS)São LeopoldoBrazil

Periods in the soybean summer cycle that are sensitive to the occurrence of high temperatures were studied. An analysis was performed on the variability of soybean yields associated with crop canopy temperatures during key development periods. A land surface temperature (LST) data series from MODIS (Moderate Resolution Imaging Spectroradiometer) on the Aqua satellite was processed between 2003 and 2012 that covered the entire state of Rio Grande do Sul, in Brazil. Enhanced vegetation index (EVI) data from MODIS on the Terra satellite were used to monitor the LST during different phenological stages. Spatially interpolated maps of soybean yield distributions were generated using data obtained from Instituto Brasileiro de Geografia e Estatística (IBGE) at state and municipality levels. The results indicate that canopy-LST occurrence in mid-February, during the grain filling, is most correlated to yield reduction (R2 = 0.82 and RMSD = 14.4%). At the state level, the average yield is 2003 kg·ha-1 with a standard deviation of 308 kg·ha-1. The overall average of the canopy-LST is 305.0 K (31.8°C) with a standard deviation of 1.9 K. The slope of the downward linear relationship between canopy-LST and yield was -28.7%. These results indicate that monitoring heat wave events can provide important information for characterising agriculture vulnerability.

关键词： Land Surface Temperature Soybean Remote Sensing Canopy Vegetation Index MODIS Data

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MOGRE-Storytelling: Interactive Creation of 3D Stories

MOGRE-Storytelling: Interactive Creation of 3D Stories

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Symposium on Virtual Reality (SVR)

作者： Almir D.V. Santiago Paulo N.M. Sampaio Luis R.S. Fernandes Graduate Program in Computing and Systems Salvador University (UNIFACS) Salvador BA Brazil Exacts Sciences and Engineering Competence Centre University of Madeira (UMa) Funchal Portugal

Storytelling is a way to represent events using words, images and sounds, often by improvisation. Stories or narratives have been shared in all cultures as a way to entertain, educate, for cultural preservation and as a way to transmit moral values. Crucial elements of stories and storytelling are the plot, the characters and the narrative point of view. Currently there are several languages and tools that allow the creation of virtual worlds, and however, few tools for creating 3D storytelling. Existing approaches are not intuitive and require a deeper knowledge of the user to enable the creation of virtual worlds with higher quality graphics, enabling the integration of customized multimedia presentations. This paper presents a solution for interactive storytelling, targeted to children and juvenile public, called Mogre-Storytelling. This tool claims to be intuitive, providing different functionalities for the creation and customization of scenarios in 3D, allowing the addition of 3D models from the Internet and even enabling the creation of virtual story using multimedia and storytelling elements such as speech bubbles, sounds and images. Mogre- Storytelling is a new option for users who want to create stories with scenarios in 3D and is an alternative to Ogre application developers, since this tool enables the rapid creation of customized scenarios with higher quality 3D graphics, while still allowing the integration of multimedia presentations using an XML file structure.

关键词： Three-dimensional displays Educational institutions Electronic mail Augmented reality Barium Abstracts

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Visualization and filtering awareness information in mobile groupware: An action research approach

Visualization and filtering awareness information in mobile ...

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International Conference on Computer Supported Cooperative Work in Design

作者： Márcio J. Mantau Carla D.M. Berkenbrock Gian R. Berkenbrock Post-Graduate Program in Applied Computing Santa Catarina State University-UDESC Centro de Engenharia da Mobilidade Universidade Federal de Santa Catarina-UFSC

This paper presents a cycle of action research conducted to investigate techniques for visualization and filtering of awareness information in a mobile collaborative game titled Warming Up The Brain. This study aims to identify the awareness information that should be presented to the users as well as how to arrange the awareness information in the mobile devices, considering its small screen size. In order to avoid problems such as information overload and information intrusiveness, the awareness information were filtered based on the group data. The game was used by 30 players, divided in 7 rounds. The usability evaluation show that the awareness information were well absorbed by users.

关键词： Games Collaboration Context Mobile communication Collaborative work Avatars Image color analysis

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Using participatory design in designing phase of collaborative systems

Using participatory design in designing phase of collaborati...

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International Conference on Computer Supported Cooperative Work in Design

作者： Luciana Pereira de Araujo Carla Diacui M. Berkenbrock Mauro Marcelo Mattos Eric Boeing UDESC Santa Catarina State University Santa Catarina State University UDESC Computer Science Department Graduate Program in Applied Computing Brazil FURB Development and Transference Technology Lab

In this paper we present the use of participatory design in a public health management system, called PRONTO, that is being developed in Brazil. This system involves a partnership between the city hall and the University of Blumenau and it is being developed by the Development Laboratory and Transfer of Technology. The project involves a health network with 64 units of family health, 8 ambulatories and 1 polyclinic. The paper describes the experience in the project phase of the Multidisciplinary Treatment System module and presents the obtained results.

关键词： Collaboration Registers Public healthcare Prototypes Educational institutions Cities and towns

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Parameter-free regularization in extreme learning machines with affinity matrices 22

Parameter-free regularization in extreme learning machines w...

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22nd European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning, ESANN 2014

作者： Silvestre, Leonardo J. Lemos, André P. Braga, João P. Braga, Antônio P. Graduate Program in Electrical Engineering Federal University of Minas Gerais Av. Antônio Carlos 6627 Belo Horizonte MG31270-901 Brazil Dept. of Computing and Electronics Federal University of Espírito Santo Brazil Dept. of Electronics Engineering Federal University of Minas Gerais Brazil Dept. of Chemistry Federal University of Minas Gerais Brazil

ISBN: (纸本)9782874190957

This paper proposes a novel regularization approach for Extreme Learning Machines. Regularization is performed using a priori spacial information expressed by an affinity matrix. We show that the use of this type of a priori information is similar to perform Tikhonov regularization. Furthermore, if a parameter free affinity matrix is used, like the cosine similarity matrix, regularization is performed without any need for parameter tunning. Experiments are performed using classification problems to validate the proposed approach.

关键词： Learning systems

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EPC information services with No-SQL datastore for the Internet of Things

EPC information services with No-SQL datastore for the Inter...

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IEEE International Conference on RFID

作者： Tuan Dinh Le Seong Hoon Kim Minh Hoang Nguyen Daeyoung Kim Seung Young Shin Kyung Eun Lee Rodrigo da Rosa Righi Deparment of Computer Science KAIST Daejeon South Korea Samsung Electronics South Korea Graduate Program in Applied Computing Universidade do Vale do Rio dos Sinos São Leopoldo Brazil

With the emergence of the Internet of Things (IoT) vision, RFID technology has attracted more and more interests from many industries. In the EPCglobal standard which standardizes RFID architectural framework and interfaces, the Electronic Product Code Information System (EPCIS) - the repository in the RFID network - plays a pivotal role in storing dynamic and historical RFID trajectory data, well-tailored to supply chain applications. However, in the IoT era, EPCIS should be capable of storing a large amount of realtime and continuous time-series RFID data in a scalable manner. Therefore, in this paper, we analyze the requirements and current design of EPCIS and report current limitations of SQL-based approaches for IoT applications. To cope with these limitations, we explore a NoSQL-based approach for EPCIS in the IoT and propose a column-family-based data model and customization for Cassandra-based EPCIS. Using real-world implementation, we also conduct a performance comparison between MySQL and Cassandra in different deployment scenarios (i.e., physical and virtual machines). As a result, we show the benefits of using Cassandra datastore for EPCIS in the IoT in terms of response time, throughput, and flexibility.

关键词： Radiofrequency identification Data models Indexes Relational databases Standards Containers

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Towards Cloud-based Asynchronous Elasticity for Iterative HPC Applications

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Journal of Physics: Conference Series 2015年第1期649卷

作者： Rodrigo da Rosa Righi Vinicius Facco Rodrigues Cristiano André da Costa Diego Kreutz Hans-Ulrich Heiss Applied Computing Graduate Program – Unisinos – Av. Unisinos 950 – São Leopoldo RS Brazil SnT University of Luxembourg – 4 rue Alphonse Weicker L-2721 Luxembourg City Luxembourg Technische Universität Berlin – Sekretariat EN 6 Einsteinufer 17 D-10587 Berlin Germany

Elasticity is one of the key features of cloud computing. It allows applications to dynamically scale computing and storage resources, avoiding over- and under-provisioning. In high performance computing (HPC), initiatives are normally modeled to handle bag-of-tasks or key-value applications through a load balancer and a loosely-coupled set of virtual machine (VM) instances. In the joint-field of Message Passing Interface (MPI) and tightly-coupled HPC applications, we observe the need of rewriting source codes, previous knowledge of the application and/or stop-reconfigure-and-go approaches to address cloud elasticity. Besides, there are problems related to how profit this new feature in the HPC scope, since in MPI 2.0 applications the programmers need to handle communicators by themselves, and a sudden consolidation of a VM, together with a process, can compromise the entire execution. To address these issues, we propose a PaaS-based elasticity model, named AutoElastic. It acts as a middleware that allows iterative HPC applications to take advantage of dynamic resource provisioning of cloud infrastructures without any major modification. AutoElastic provides a new concept denoted here as asynchronous elasticity, i.e., it provides a framework to allow applications to either increase or decrease their computing resources without blocking the current execution. The feasibility of AutoElastic is demonstrated through a prototype that runs a CPU-bound numerical integration application on top of the OpenNebula middleware. The results showed the saving of about 3 min at each scaling out operations, emphasizing the contribution of the new concept on contexts where seconds are precious.

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Dynamic timeout power policy for network interfaces

Dynamic timeout power policy for network interfaces

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IEEE International Conference on Consumer Electronics - Berlin (ICCE-Berlin)

作者： Bruna M. J. C. Vilar Fabiano De M Silva Saulo O. D. Luiz J. J. Silva Hyggo Almeida Angelo Perkusich Post-Graduate Program in Electrical Engineering - PPgEE COPELE Embedded Systems and Pervasive Computing Laboratory Universidade Federal de Campina Grande Campina Grande PB BR Center of Electrical Engineering and Informatics Federal University of Campina Grande Campina Grande Brazil Embedded Systems and Pervasive Computing Laboratory Federal University of Campina Grande

Network interfaces are present in a variety of battery powered computer systems, such as notebooks, ultrabooks, tablets and mobile phones. Considering that the battery life is still a constraint, there are opportunities for power management by reducing the power consumption of idle network interfaces. In this work, a dynamic timeout power policy for network interfaces is presented, incorporating workload estimation and a problem optimization at runtime, thus providing power savings and suitable performance.

关键词： Heuristic algorithms Network interfaces Power demand Optimization Mobile handsets Internet Stochastic processes

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A software framework for user-level power management

A software framework for user-level power management

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IEEE International Conference on Consumer Electronics - Berlin (ICCE-Berlin)

作者： Bruna M. J. C. Vilar Diógenes G. Gondim Zeus C. Barros Frederico M. Bublitz Hyggo O. Almeida Angelo Perkusich Post-Graduate Program in Electrical Engineering–PPgEE–COPELE Embedded Systems and Pervasive Computing Lab Center for Strategic Technologies in Health–NUTES State University of Paraiba–UEPB Electrical Engineering Department (DEE) Federal University of Campina Grande–UFCG

Most operating systems implement their own power management techniques, but it is hard to modify or hack their power policies without the source code. Many dynamic power management architectures have been proposed in the literature, but they are not integrated with the underlying OS power manager. In this work, we propose a software framework for user-level power management, with a flexible architecture to be adapted to different policies and integrated with OS power managers.

关键词： Power demand Middleware Operating systems Network interfaces Mathematical model Estimation

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