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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 Universidade do Vale do Rio dos Sinos - Unisinos São Leopoldo RS Brazil

New information and communication technologies enable a better management of the available resources in a smart city. Leaders need tools to analyze data for better decisions, anticipate problems and resolve them proactively. In this context, this article proposes a simulation tool to analyze the interaction of typical cities occurrences like criminal and police. The information of both occurrences, including their densities, are inserted and visualized on a city map. Each record is marked on the GPS point where it happened. From these inputs data, the interactions are modeled by Voronoi Diagrams. The occurrences change their position according to the size area of the opposite event. In this way, crimes runway from police and police catch crimes occurrences. As results, we show that a large increase of police actions will not influence quantitatively in the reduction of criminal occurrences out of a critical zone.

关键词： Data visualization Cities and towns Generators Vectors Government Registers

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Inter-comparison of multiple Global Climate Model (GCM) data based on spatial pattern of rainfall over Indonesia 5

Inter-comparison of multiple Global Climate Model (GCM) data...

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5th International Symposium on LAPAN-IPB Satellite for Food Security and Environmental Monitoring 2018, LISAT-FSEM 2018

作者： Aflahah, Elania Latifah, Arnida Lailatul Hidayat, Rahmat Hidayati, Rini Ihwan, Andi Applied Climatology Study Program Graduate School Bogor Agricultural University Bogor16680 Indonesia Laboratorium of High-Performance Computing Research Center for Informatics Indonesian Institute of Sciences West Java Bogor16916 Indonesia Department of Geophysics and Meteorology Bogor Agricultural University Bogor16680 Indonesia

The Coupled Model Inter-comparison Project Phase 5 (CMIP5) is the output of many coupled atmosphere-ocean of global climate models (GCMs) and widely used for climate research, especially for driving regional climate model. There are more than 40 CMIP5 GCMs data available, but no single model can be considered as the best for every region. The use of CMIP5 GCMs data for rainfall projection in Indonesia is important to improve the accuracy of the monthly and seasonal rainfall forecast. Then, this study evaluates the capability of the CMIP5 GCMs data for Indonesia region by quantitatively comparing the spatial pattern of the precipitation mean and standard deviation of the CMIP5 data against GPCP, GPCC, and CRU data in the period 1980-2005. Furthermore, the composite analysis is conducted to observe the model performance in reproducing the precipitation characteristic over some areas in Indonesia. In conclusion, the models NorESM1-M, NorESM1-ME, GFDL-ESM2M, CSIRO-MK3-6-0 perform the rainfall mean better than others, while the standard deviation of the rainfall show that the models NorESM1-M, BNU-ESM, CMCC-CMS are superior in which NorESM1-M gives the best performance. The annual precipitation pattern of the model NorESM1-M over various areas in Indonesia is also highly correlated with the observations. Thus, the most suitable model for Indonesia region is NorESM1-M. © Published under licence by IOP Publishing Ltd.

关键词： Climate models

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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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Network-Aware Container Scheduling in Multi-Tenant Data Center

Network-Aware Container Scheduling in Multi-Tenant Data Cent...

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IEEE Global Communications Conference

作者： Leonardo R. Rodrigues Marcelo Pasin Omir C. Alves Charles C. Miers Mauricio A. Pillon Pascal Felber Guilherme P. Koslovski Graduate Program in Applied Computing Santa Catarina State University Joinville Brazil University of Neuchâtel (UniNE) Institut d'informatique Switzerland

ISBN: (数字)9781728109626

ISBN: (纸本)9781728109633

Network management on multi-tenant container-based data center has critical impact on performance. Tenants encapsulate applications in containers abstracting away details on hosting infrastructures, and entrust data center management framework with the provisioning of network Quality-of-Service requirements. In this paper, we propose a network-aware multi-criteria container scheduler to jointly process containers and network requirements. We introduce a new Mixed Integer Linear programming formulation for network-aware scheduling encompassing both tenants and providers metrics. We describe two GPU-accelerated modules to address the complexity barrier of the problem and efficiently process scheduling requests. Our experiments show that our scheduling approach accounting for both network and containers outperforms traditional algorithms used by containers orchestrators.

关键词： Containers Servers Bandwidth Quality of service Resource management Scheduling Processor scheduling

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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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Integrity of Cyber-Physical Discrete Event Systems under covert actuator attacks

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IFAC-PapersOnLine 2024年第1期58卷 198-203页

作者： Samuel Oliveira André B. Leal Marcelo Teixeira Yuri K. Lopes Department of Exact and Technological Sciences Federal University of Amapá (UNIFAP) Macapá/AP Brazil Graduate Program in Electrical Engineering Santa Catarina State University (UDESC) Joinville/SC Brazil Graduate Program in Electrical Engineering Federal University of Technology (UTFPR) Pato Branco/PR Brazil Graduate Program in Applied Computing Santa Catarina State University (UDESC) Joinville/SC Brazil

The connectivity requirements brought by Industry 4.0 pose new challenges for cyber-physical systems (CPS), such as the strengthening of their resilience against cyberattacks. In this paper, we use the discrete event systems (DES) formalism to develop an approach that aims to protect CPS from covert actuator attacks using event permutation maps. In this approach, properly selected controllable events are permuted on the plant's site so that attacks on actuators do not have the impact on the plant as expected by the intruder and unsafe states are avoided. Furthermore, a property termed AE-protectability is presented to characterize the necessary and sufficient conditions for the system to be protected against such attacks through event permutations. The proposed approach is applied to a case study where the Identification of the attack is done without causing damage while maintaining the integrity of the system.

关键词： Cyber-security Supervisory Control Theory Diagnosis

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Virtual Reality Evolution in Brazil: A Survey over the Papers in the "Symposium on Virtual and Augmented Reality"

Virtual Reality Evolution in Brazil: A Survey over the Paper...

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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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Tackling Virtual Infrastructure Allocation in Cloud Data Centers: a GPU-Accelerated Framework

Tackling Virtual Infrastructure Allocation in Cloud Data Cen...

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International Conference on Network and Service Management

作者： Lucas L. Nesi Maurício A. Pillon Marcos D. de Assunção Charles C. Miers Guilherme P. Koslovski Graduate Program in Applied Computing Santa Catarina State University Joinville Brazil Inria Avalon LIP Laboratory ENS Lyon University of Lyon France

ISBN: (纸本)9781538691939;9783903176140

Allocating IT resources to Virtual Infrastructures (VIs) (i.e., groups of VMs, virtual switches, and their network interconnections) is a problem which belongs to a class known to be NP-hard. Several approaches designed to run on CPUs have been proposed for reducing the search space and finding suitable allocation solutions. Most algorithms, however, face scalability issues when considering current cloud data centers comprising thousands of servers. To overcome these limitations, this work offers a set of allocation algorithms designed for Graphic Processing Units (GPUs). Experimental results evaluate the scalability of the algorithms and demonstrate their ability to handle three large-scale data center topologies.

关键词： Resource management Servers Cloud computing Graphics processing units Topology Clustering algorithms Network topology

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Protein Structure Prediction Using Dynamic Speciation Evolutionary Algorithm with Aggregated Problem Information

Protein Structure Prediction Using Dynamic Speciation Evolut...

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IEEE Symposium on Computational Intelligence and Bioinformatics and Computational Biology (CIBCB)

作者： Rafael Stubs Parpinelli Nicholas Wojeicchowski Nilcimar Neitzel Will Graduate Program in Applied Computing State University of Santa Catarina Joinville Brazil Computer Science Department State University of Santa Catarina Joinville Brazil

ISBN: (数字)9798350356632

ISBN: (纸本)9798350356649

Protein structure prediction in three dimensions represents a fundamental challenge in Structural Bioinformatics. Leveraging problem-specific information such as fragment insertion, secondary structure, and contact maps can significantly enhance the exploration of the search space. In this study, an evolutionary algorithm is introduced, which incorporates such problem information for protein structure prediction. The proposed method employs a dynamic speciation technique alongside fragment insertion to foster population diversity. To ensure a rich variety of fragments, a fragment library is constructed using the Rosetta Quota protocol. Additionally, information from contact maps and secondary structure is integrated into two selection strategies to facilitate a more thorough exploration of the conformational search space. The results of an experimental evaluation involving 9 proteins are presented, demonstrating competitive performance compared to existing literature. Evaluation metrics include RMSD, GDT, and processing time.

关键词： Proteins Measurement Visualization Protocols Heuristic algorithms Evolutionary computation Search problems Libraries Space exploration Bioinformatics

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Introducing Engineering Undergraduate Students to Network Management Techniques: a Hands-on approach using the Citylab Smart City

Introducing Engineering Undergraduate Students to Network Ma...

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IEEE Education Engineering (EDUCON)

作者： Henrique Carvalho de Resende Nina Slamnik-Krijestorac Cristiano Bonato Both Johann Marquez-Barja IDLab - Faculty of Applied Engineering University of Antwerp - imec Antwerp Belgium Applied Computing Graduate Program Universidade do Vale do Rio dos Sinos Porto Alegre RS Brazil

ISBN: (数字)9781728109305

ISBN: (纸本)9781728109312

The computer network industry is preparing for the revolution caused by the virtualization of the network infrastructure. The virtualization of network functions, together with the network programmability, is a fundamental skill-set required in both electrical engineers and computer scientists, which will become even more significant in the upcoming years. Therefore, in this article, we present an educational framework for Service Function Chaining (SFC) practical teaching to undergraduate students aiming to prepare them for future Information and Communication Technologies (ICT) and communication networks market that will demand skillful professionals in the domain. The educational framework was designed for the Network Management course at the University of Antwerp. To structure the content of the framework's sessions, we explain the fundamental concepts behind the SFC. Moreover, we detail the framework objectives, sessions, and how we plan to evaluate it. We also present facts and works that endorse the hands-on teaching preparing students for the research and development in the new generation communication networks arena. After, we discuss the methodology of the educational framework alignment with joint ACM/IEEE Computer Engineering Curricula for Network Management courses. Next, we present possible outcomes during the course evaluation using the survey. We conclude which this educational framework achieves the necessary core learning outcomes to empower students concerning the practical steps when deploying and managing communication networks and the virtualization techniques which nowadays are being applied.

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