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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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Cloud elasticity for HPC applications: Observing energy, performance and cost

Cloud elasticity for HPC applications: Observing energy, per...

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Conferencia Latinoamericana En Informatica (CLEI)

作者： Vinicius Facco Rodrigues Gustavo Rostirolla Rodrigo da Rosa Righi Cristiano André da Costa Jorge Luis Victoria Barbosa Applied Computing Graduate Program Unisinos São Leopoldo RS Brazil Applied Computing Graduate Program Unisinos RS Brazil

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.

关键词： Cloud computing Elasticity Computational modeling Manuals Monitoring High performance computing

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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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4G/5G performance of a multi-RAT UAV for medical parcel delivery 19

4G/5G performance of a multi-RAT UAV for medical parcel deli...

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19th IEEE Annual Consumer Communications and Networking Conference, CCNC 2022

作者： De Resende, Henrique Carvalho Pinheiro, Joao Francisco Nunes Reiter, Philippe Both, Cristiano Bonato Marquez-Barja, Johann M. University of Antwerp - Imec IDLab Faculty of Applied Engineering Antwerp Belgium Universidade Do Vale Do Rio Dos Sinos Applied Computing Graduate Program RS Porto Alegre Brazil

ISBN: (纸本)9781665431620

Unmanned Aerial Vehicles (UAVs) are being developed and researched to be used in different areas and diverse use cases. The delivery of medical parcels is an emergency service that avails from the air traffic for the fast delivery of critical health content. Besides 5G networks being the target communication technology for the UAV parcel transport, the infrastructure is still not optimized for ground-level User Equipments (UEs). Using multiple Radio Access Technology (RAT) by UAVs is an alternative solution for scenarios where the 5G network is unstable or not yet fully deployed. In this paper, we present bench-marking of 5G and 4G networks on unideal radio scenarios to understand the real latency and throughput delivered by these technologies in worst-case scenarios. The results show that the 5G network can provide the necessary Quality of Service (QoS) for UAV operations even with Reference Signal Received Power (RSRP) in the order of -90. In comparison, the preliminary data for the 4G network validates that the 4G network could not provide the required latency. © 2022 IEEE.

关键词： 5G mobile communication systems

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MOSIS - Multi-outcrop sharing & interpretation system 37

MOSIS - Multi-outcrop sharing & interpretation system

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37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017

作者： Gonzaga, Luiz Veronez, Mauricio Roberto Alves, Demetrius Nunes Bordin, Fabiane Kannenberg, Gabriel Lanzer Marson, Fernando P. Tognoli, Francisco M.W. Inocencio, Leonardo C. Graduate Program on Applied Computing UNISINOS São Leopoldo RS Brazil Graduate Program on Geology UNISINOS São Leopoldo RS Brazil Advanced Visualization and Geoinformatics Laboratory UNISINOS São Leopoldo RS Brazil

ISBN: (纸本)9781509049516

The use of LiDAR and multiples digital images jointly with 3-D reconstruction techniques for creating 3-D models of natural outcrops and surfaces studies have increased dramatically in the last few years. These techniques have provided an enormous amount of data for interpretation by geoscientists. However, these researchers have no available software capable of offering a user experience comparable to the fieldwork. The majority of solutions have considered desktop systems, which presents inherent limitations due to the 2-D characteristics of displays and loss of immersion into the 3-D model, or up until expensive and complex stereoscopic based approaches to improve the 3-D user experience do not offer well suitable solutions. To address these limitations, this paper presents a low-cost completely disruptive solution for processing, visualizing, sharing and directly handling Digital Outcrop Models with the support of a full interpretation toolset, the MOSIS System. The proposed system provides a fully immersive computational environment, capable of teleporting virtually geoscientists to the fieldwork, giving an awareness of being there physically with an extensible toolset for the DOM's interpretation. Besides, desktop, web and mobile versions of MOSIS have been under development and fulfill the lack of tools for digital outcrop modeling. © 2017 IEEE.

关键词： Three-dimensional displays Geology Data visualization Solid modeling Tools Visualization Standards

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EAVIRA: Energy-Aware Virtual Infrastructure Reallocation Algorithm

EAVIRA: Energy-Aware Virtual Infrastructure Reallocation Alg...

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Brazilian Symposium on computing System Engineering (SBESC)

作者： Denivy B. Ruck Maurício A. Pillon Charles C. Miers Guilherme P. Koslovski Department of Computer Science Graduate Program in Applied Computing

The elastic provisioning of Virtual Infrastructures (VIs) enables a dynamic management of cloud resources (computing and communication) in order to meet the hosted application's requirements. Thus, to perform elasticity requests, providers usually rely on reallocation mechanisms and policies. The concerns regarding the environment and the operational costs indicate energy consumption of the data centers as recurring topic in providers policies. Moreover, energy-aware provisioning is beneficial for tenants also. Recent cost models have introduced an implicit incentive to use computing and networking resources just when need to avoid high rent costs. However, reallocation and elasticity requests can unbalance the Data Center (DC) unnecessarily increasing the number of active servers. In this paper we propose EAVIRA algorithm, which takes into account the proportional sharing of CPU usage of DC servers to calculate individual usage costs to: disable idle equipments, and reallocate VIs. EAVIRA acts on online requests for elasticity configuration and performs an offline load balancing, triggered by the Infrastructure as a Service (IaaS) provider. Our experimental analysis indicates a reduction of energy consumption and an increasing on acceptance ratio of allocation requests.

关键词： Resource management Servers Energy consumption Elasticity Cloud computing Load management Computational modeling

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Redesigning transaction load balancing on electronic funds transfer scenarios 14

Redesigning transaction load balancing on electronic funds t...

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29th Annual ACM Symposium on applied computing, SAC 2014

作者： Da Rosa Righi, Rodrigo Da Costa, Cristiano André Gonzaga Jr., Luiz Farias, Kleinner Andrade, Alexandre Luis Graebin, Lucas Universidade do Vale do Rio dos Sinos Applied Computing Graduate Program Unisinos Av. 950 São Leopoldo RS Brazil

ISBN: (纸本)9781450324694

The use of electronic medias for payment has been increasingly adopted, instead of employing money in currency paper or check directly. Considering this electronic funds transfer (EFT) scenario, we developed a model called GetLB which comprises not only a completely new and efficient scheduler but also a cooperative communication infrastructure for handling heterogeneous and dynamic environments. The scientific contribution consists of a scheduling heuristic that combines static data from transactions and dynamic one from processing nodes to overcome the limitations of Round-Robin. Besides the GetLB's description, this article also presents a prototype evaluation by using both traces and configurations obtained with a real EFT company. Copyright 2014 ACM.

关键词： Scheduling

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Software supply chain security: a systematic literature review

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International Journal of Computers and Applications 2024年第10期46卷 853-867页

作者： Reichert, Beatriz M. Obelheiro, Rafael R. Graduate Program in Applied Computing Santa Catarina State University Joinville Brazil

In recent years, software supply chain security has attracted significant research attention. This research subject is concerned both with the security of infrastructures used to build software and deliver it to end users and with the security of software that contains external dependencies such as third-party packages and libraries, and its chief goal is to ensure that no vulnerabilities are introduced in the path between developers and users. This paper presents a Systematic Literature Review to identify knowledge gaps in software supply chain security. For this, we considered studies published between 2012 and 2023 in the search engines of IEEE Xplore, ACM Digital Library, Engineering Village, Scopus, and arXiv. Of the 2051 studies obtained in the primary survey, only 85 are relevant for this research. Analyzing the studies, we observed gaps such as little discussion of software supply chains that involve cloud components, few proposals focused on the software distribution process, and a lack of use of threat modeling frameworks to help identify threats to the supply chain and validate the results. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Software packages

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Artificial neural network-based method to classify sedimentary rocks 12

Artificial neural network-based method to classify sedimenta...

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12th International Conference on Sensing Technology, ICST 2018

作者： Figueiredo, Rodrigo Marques Veronez, Mauricio Roberto Wohnrath, Francisco Manoel Da Silva, Marcio Rosa Gonzaga, Luiz Kupssinsku, Lucas Silveira Bordin, Fabiane Brum, Diego Cazarin, Caroline Lessio Graduate Program in Geology Unisinos University Saõ Leopoldo Brazil Advanced Visualization and Geoinformatics Laboratory Unisinos University Saõ Leopoldo Brazil Graduate Program in Electrical Engineering Unisinos University Saõ Leopoldo Brazil Graduate Program in Applied Computing Unisinos University Saõ Leopoldo Brazil Rio de Janeiro Brazil

ISBN: (纸本)9781538651476

In a geological study, an important step is to determine the type of sedimentary rock or its grain size. Such a determination requires accurate analysis in the field or in a laboratory. As the size of the study area grows, this activity can be time consuming and error prone because the number of specialists working under rigid criteria also increases. This paper proposes a novel methodology to classify grain size using unique wavelength reflectance data and artificial neural networks. The results indicate that the proposed method can be reliably used in the field. © 2018 IEEE.

关键词： Neural networks

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Optimal resource allocation for survivable virtual infrastructures

Optimal resource allocation for survivable virtual infrastru...

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International Workshop on Design of Reliable Communication Networks (DRCN)

作者： Gustavo A. de S. Cavalcanti Rafael R. Obelheiro Guilherme Koslovski Graduate Program in Applied Computing Department of Computer Science Santa Catarina State University Graduate Program in Applied Computing Santa Catarina State University

Virtual infrastructures (VIs) consolidated the dynamic provisioning of computing and communication resources. A VI is a set of virtual machines interconnected by virtual links and switches/routers. Infrastructure providers (InPs) manage the physical substrates in which virtual resources requested by VIs (such as CPU, disk, memory, bandwidth) are reserved and allocated. Resource allocation is a complex problem that needs to satisfy different goals: users expect to run their applications on survivable VIs, while InPs aim to maximize profits, minimize costs and reduce substrate fragmentation. However, there is a dichotomy between minimizing substrate fragmentation, by co-locating VIs, and maximizing VI survivability, by sparsely allocating resources in order to decrease the impact of substrate failures. In this context, this paper discusses VI survivability and its impact on substrate fragmentation. We propose a mixed integer linear programming model to allocate resources considering the joint coordination of fragmentation and survivability. Experimental results suggest that it is possible to enhance VI survivability without significantly impacting substrate fragmentation.

关键词： Substrates Resource management Measurement Indium phosphide Servers Bandwidth Linear programming

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