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41st Latin American computing Conference, CLEI 2015

作者： Rodrigues, Vinicius Facco Rostirolla, Gustav. Da Rosa Righi, Rodrigo André Da Costa, Cristiano Barbosa, Jorge Luis Victória Applied Computing Graduate Program - Unisinos Av. Unisinos 950 Sâo Leopoldo RS Brazil

ISBN: (纸本)9781467391436

Elasticity is one of the most known capabilities related to cloud computing, being largely deployed using thresholds. In this way, limits are used to drive resource mangement actions, leading to the following problem statements: How can cloud users set the threshold values to enable elasticity in their cloud applications? And what is the impact of the application's load pattern in the elasticity? This article answers these questions for iterative high performance computing applications, showing the impact of both thresholds and load patterns on application performance and resource consumption. To accomplish this, we developed a reactive and PaaS-based elasticity model called AutoElastic and employed it over a private cloud to execute a numerical integration application. Here, we are presenting an analysis of best practices and possible optimizations regarding the elasticity and HPC pair. Considering the results, we observed that the upper threshold influences the application time more than the lower one. © 2015 IEEE.

关键词： Elasticity

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Towards a multilevel energy sav.ng model for smart cities 35

Towards a multilevel energy saving model for smart cities

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35th International Conference of the Chilean Computer Science Society, SCCC 2016

作者： Rostirolla, Gustav. Da Rosa Righi, Rodrigo Andre Da Costa, Cristiano Barbosa, Jorge Luis Victoria Applied Computing Graduate Program-Unisinos Av. Unisinos 950 São Leopoldo RS Brazil

ISBN: (纸本)9781509033393

As a result of rural and suburban migration to the cities, urban life has become a significant challenge for citizens and mayors, imposing a huge concern in the sustainable use of resources like energy, water, transportation and housing. Smart cities are the biggest bet to address these challenges efficiently through a real-time monitoring approach which aims to assist in intelligent planning and sustainable urban development. However, to accomplish this monitoring efficiently and to enable the sustainable use of resources, it is necessary an integration between citizens, city devices and the platform where the data is stored and processed. In this context, we are proposing the 3LES model (3 Levels of Energy Sav.ng for Smart Cities), a model that combines data from citizens, city devices and nodes from the processing plataform to offer a multilevel energy sav.ng proposal. 3LES must act transparently without affecting the quality of the services already offered in the city. This paper presents the components of management and monitoring of power consumption at various levels, as well as a model that monitors the energy consumption of elastic cloud applications. The results are promising, with a model that allows the estimation of the energy consumption of elastic applications based on CPU and memory traces with an av.rage and median precision of 97.15% and 97.72%. In addition, we obtained a reduction of more than 90% in the energy spent in public lighting in the city of Rome when analyzing the citizens' location. © 2016 IEEE.

关键词： Energy utilization

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Automatic clocking and idleness management in enterprise environments using wireless sensors 42

Automatic clocking and idleness management in enterprise env...

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42nd Latin American computing Conference, CLEI 2016

作者： Da Rosa Righi, Rodrigo Rostirolla, Gustav. Andre Da Costa, Cristiano Fischer, Gabriel Souto Wendt, Ivam Guilherme Souza Dos Reis, Eduardo Applied Computing Graduate Program Unisinos Av. Unisinos 950 São Leopoldo RS Brazil

ISBN: (纸本)9781509016334

Clocking represents the manner in which companies register employee data;particularly, data related to entrances to and departures from the company. Being normally implemented with wireless cards or by hand, this procedure can implies on large queues, reducing the emloyee productivity, besides being sensitive to longer complications (when the employee forget to register the clocking, for example). In this context, we developed a model named ACID (Automatic Clocking and Idleness Detection) to bring benefits for both administrators and employees through the use of wireless sensors. Besides eliminating queues, it is possible to analyze those employees that are away from their own places for more than a particular threshold. In addition, the model is also pertinent to enhance decision support when promotions take place. We developed a prototype that was evaluated through simulation, taking into account the architectural plant and the employees behav.or of five real Brazilian companies. The results reveals the benefits of using IDAC both at the owner (control and productivity) and employees (the clocking actions occurs automatically) levels. © 2016 IEEE.

关键词： Productivity

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Vulcanus: A recommender system for accessibility based on trails 41

Vulcanus: A recommender system for accessibility based on tr...

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41st Latin American computing Conference, CLEI 2015

作者： Cardoso, Ismael Gomes Mota, Bruno Barbosa, Jorge Luis Victória Da Rosa Righi, Rodrigo Applied Computing Graduate Program - Unisinos Av. Unisinos 950 Sâo Leopoldo RS Brazil

ISBN: (纸本)9781467391436

The use of recommender systems is widespread in several everyday systems. People are now exposed to different offerings, based on their interests, in order to anticipate decisions. However, in a different way recommender systems for accessibility domain require further studies and researches. In order to provide resources for people with special needs, we developed the Vulcanus, a recommender system designed for people with disabilities, offering access to resources according user's needs. The recommender system approaches concepts from ubiquitous computing, such as user profiles, context awareness, trails management, and similarity analysis. Vulcanus uses two different approaches: resources patterns and categories patterns;where different systems can use it, for example as a Web Service. Vulcanus was evaluated in different scenarios. These scenarios used more than 800 thousands of trails that simulate wheelchair users using resources along six months. The obtained results show that both approaches are able to provide relevant recommendations, providing resources that in fact can support users' needs. © 2015 IEEE.

关键词： Recommender systems

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Ubiquitous computing in light of human phenotypes: foundations, challenges, and opportunities

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Journal of Ambient Intelligence and Humanized computing 2023年第3期14卷 2341-2349页

作者： Bav.resco, Rodrigo Simon Barbosa, Jorge Luis Victória Applied Computing Graduate Program - PPGCA University of Vale do Rio dos Sinos - UNISINOS Av. Unisinos São Leopoldo Rio Grande do Sul93.022-000 Brazil

The interest in human phenotypes has leveraged interdisciplinary efforts encouraging a better understanding of the broad spectrum of psychological and behav.oral disorders. Moreover, the usage of mobile and wearable devices along with unobtrusive computational capabilities provides an extensive amount of information that allows the characterization of phenotypes. This article describes the human phenotype through the lens of computational range and reviews state-of-the-art computational phenotyping. Furthermore, the article discusses computational phenotyping’s extension concerning the combination of intelligent environments and personal mobile devices, addressing technical, managerial, and ethical challenges. This combination reinforces ubiquitous computational capabilities for phenotyping as a facilitator of interdisciplinary information convergence in fav.r of clinical and biomedical research. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Wearable technology

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3D data acquisition using stereo camera 38

3D data acquisition using stereo camera

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38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018

作者： Kirsten, Evandro Inocencio, Leonardo Campos Veronez, Maurício Roberto Da Silveira, Luiz Gonzaga Bordin, Fabiane Marson, Fernando Pinho Advanced Visualization and Geoinformatics Laboratory UNISINOS Saõ Leopoldo RS Brazil Graduate Program on Applied Computing UNISINOS Av. UNISINOS 950 Saõ Leopoldo RS93022-750 Brazil

ISBN: (纸本)9781538671504

Computer vision systems allow digital reconstruction of targets by capturing information through remote sensors such as video cameras and scanners. In this context, the objective of this work was to evaluate the capacity and quality of three-dimensional reconstruction of static targets using the ZED stereoscopic camera. For this goal, we took images of several environments and objects with different surfaces, textures, lighting, distances and acquisition speeds. The results were compared with high-density and high precision point clouds obtained from the targets using a Leica Viva TS15 total station. The data were processed in the CloudCompare software to calculate the displacement between the models generated by the camera and the total station. Under certain circumstances, this technology is able to reconstruct three-dimensional objects and environments with an error of a few centimeters. © 2018 IEEE.

关键词： Computer vision

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Analysis of positional and geometric accuracy of objects in survey with unmanned aerial vehicle (Uav. 38

Analysis of positional and geometric accuracy of objects in ...

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38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018

作者： Soares, Gabriel Inocencio, Leonardo Campos Veronez, Maurício Roberto Da Silveira, Luiz Gonzaga Bordin, Fabiane Marson, Fernando Pinho Advanced Visualization and Geoinformatics Laboratory UNISINOS São Leopoldo RS Brazil Graduate Program on Applied Computing UNISINOS Av. UNISINOS 950 São Leopoldo RS93022-000 Brazil

ISBN: (纸本)9781538671504

This study aimed the analysis of the positional and geometric accuracy of objects in orthomosaics obtained through different unmanned aerial vehicle (Uav. data processing software covering an area located within Universidade do Vale do Rio dos Sinos - unisinos in São Leopoldo, RS. A total of nine ground control points (GCP) and twenty checkpoints were surveyed in order register and classify the processed orthomosaics according to the cartographic accuracy standard - Padrão de Exatidão Cartográfica (PEC). Four software was employed to process the Uav.data: Pix4D mapper, Agisoft PhotoScan, Menci APS and Bentley Context Capture. The results obtained from each software were compared and identified the smallest distortions when processing with and without ground control points. The flight was executed at a height of 90m with 60% sidelap and 80% overlap using an ST800 Uav.equipped with a Sony NEX-7 small format non-metric camera with 24 megapixels resolution. The software GeoPEC was used to classify the orthomosaics according to PEC. For data processed with ground control points all orthomosaics were classified “Class A” in 1/500 scale, however, only Menci APS did not present a trend line via t-student test. On the other hand, Menci APS presented the worst results without the ground control points. In processing with GCP, all orthomosaics obtained optimum results with an approximated error of 2,5 m2 about 0,03% of the area. © 2018 IEEE

关键词： Cartographic Accuracy Standard Ground Control Points Orthomosaic Unmanned Aerial Vehicle

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Saasport model: Exploring protocol portability, resource elasticity and microservice architecture in the efficient execution of iot applications 20

Saasport model: Exploring protocol portability, resource ela...

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20th International Conferences on WWW/Internet 2021 and applied computing 2021

作者： da Silveira, Maria Gisele Flores da Silva Silveira, Wagner da Rosa Righi, Rodrigo da Costa, Cristiano André Griebler, Dalvan Três de Maio - RS Brazil Applied Computing Graduate Program Unisinos University Av. Unisinos 950 RS São Leopoldo Brazil Av. Ipiranga 6681 RS Porto Alegre Brazil

ISBN: (纸本)9789898704344

Despite the high growth of the Internet of Things and the multitude of applications that use the information generated, it is estimated that 90 % of these data are not yet fully used. This is because IoT systems are based on heterogeneous networks and devices with resource restrictions, which cannot execute significant processing. So one of the alternatives that hav. been addressed is the use of cloud applications, where the data can be appropriately processed, stored, and analyzed. In the cloud, applications can then employ resource elasticity and be developed in microservice architectures. In state-of-the-art, the main efforts to provide portability and efficient treatment of IoT applications are described. However, a platform that provides protocol portability, resource elasticity using microservices architecture for the efficient execution of IoT applications has not yet been implemented. In this context, this work presents SaaSport, which among its contributions, will allow the efficient treatment of data generated by IoT devices that use the MQTT and CoAP protocols. The final result of this work demonstrates that the model provides an efficient treatment of the data generated in IoT environments. © 20th International Conferences on WWW/Internet 2021 and applied computing 2021.

关键词： Elasticity

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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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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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