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2022 International Symposium on Networks, Computers and Communications, ISNCC 2022

作者： Ximenes, Pablo Mello, Patricia School of Cybersecurity and Privacy College of Computing Atlanta United States Computer Science Graduate Program Fortaleza Brazil

ISBN: (数字)9781665485449

ISBN: (纸本)9781665485449

This paper uses the Diamond Model of intrusion analysis to discuss the intricacies and unfoldings of the cyberattack that enabled Operation 'Car Wash' leak (nicknamed 'VazaJato'), one of the most significant leaks in Brazil's political history. Our discussion tries to understand the cyberattack that took place in a threat intelligence perspective and, as a result, it draws conclusions and presents an assessment and some recommendations with regards to cybersecurity policy. © 2022 IEEE.

关键词： Cybersecurity

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A method to automatically identify road centerlines from georeferenced smartphone data

A method to automatically identify road centerlines from geo...

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14th Brazilian Symposium on GeoInformatics, GEOINFO 2013

作者： Costa, George Henrique Rangel Baldo, Fabiano Graduate Program in Applied Computing Computer Science Department UDESC Santa Catarina State University Joinville Brazil

Digital road maps have gained fundamental role in population's daily life, so they need to be accurate and up-to-date. A viable solution is to generate maps by processing GPS data. However, one of the most challenging tasks regarding this approach is how to extract road centerlines from the cloud of georeferenced GPS points. The literature presents various methods that do it, but none have been found that is prepared for the continuous update of the map and refinement of its roads' accuracy. In this context, the objective of this work is to propose a method to identify road centerlines using an evolutive algorithm in order to generate and update road maps. This work uses as source of data GPS traces collected by smartphones. Although suitable to obtain a large amount of georeferenced data, these devices bring the additional problem of identifying the transport vehicle used along each trace. Preliminary results indicate that the method's performance is satisfactory, with an average variation of 2.95 meters in relation to satellite images.

关键词： Smartphones

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Towards a multilevel energy saving 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, Gustavo 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 Saving for Smart Cities), a model that combines data from citizens, city devices and nodes from the processing plataform to offer a multilevel energy saving 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 average 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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Recommender systems in mobile apps for health a systematic review 12

Recommender systems in mobile apps for health a systematic r...

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12th Iberian Conference on Information Systems and Technologies, CISTI 2017

作者： Ferretto, Luciano Rodrigo Cervi, Cristiano Roberto De Marchi, Ana Carolina Bertoletti Graduate Program in Applied Computing - PPGCA/ICEG Universidade de Passo Fundo - UPF Passo Fundo Brazil

ISBN: (纸本)9789899843479

This paper aims to identify and analyze recommender systems developed for the health area, available in mobile applications. Therefore, literature was reviewed systematically from ACM, IEEE, Springer and Science Direct databases. 1006 studies were found, eight of which met the eligibility criteria. From the chosen studies, only one was not applied to the areas of nutrition and physical activity. The recommender techniques adopted were Collaborative Filtering and Content-based Filtering. The main mobile device identified was the Smartphone and the Operating System was Android. After analyzing the results, it was possible to realize that, although they are widely used in ecommerce, recommendation systems do not have many mobile healthcare applications, and the existing ones are recent. © 2017 AISTI.

关键词： Smartphones

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Gamification strategies for mobile device applications: A systematic review 12

Gamification strategies for mobile device applications: A sy...

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12th Iberian Conference on Information Systems and Technologies, CISTI 2017

作者： Cechetti, Nathalia Pinto Biduki, Daiana De Marchi, Ana Carolina Bertoletti Graduate Program in Applied Computing - PPGCA/ICEG Universidade de Passo Fundo - UPF Passo Fundo Brazil

ISBN: (纸本)9789899843479

In the quest to engage and motivate users on the use of mobile applications, the gamification concept has been excelling in the market since incorporates game elements in a non-game context. Scoring systems, challenges, competitions and badges, are some of the elements implemented in many fields, such as health, education, ecological awareness, among others. In this context, this study aimed to systematically review available literature to identify gamification strategies used in mobile applications. A search was conducted in ACM, Science Direct and Scopus databases, from March to June 2016. A total of 402 studies were found, 23 of which met the eligibility criteria. The results demonstrated the heterogeneity of gamification elements being used and the impact they caused in the applications, especially as a motivational factor for users. This study provides the basis for future research on gamification methods and emphasizes the importance of this concept to increase engagement and provide enjoyment to users. © 2017 AISTI.

关键词： Mobile computing

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Fixed-wing UAV robust guidance strategy based on compound flight mission of on-ground targets 31

Fixed-wing UAV robust guidance strategy based on compound fl...

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31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018

作者： Olavo, José Lucas Gomes Torres, Leonardo Antônio Borges Jesus, Tales Argolo Graduate Program in Electrical Engineering UFMG Brazil Department of ElectronicsEngineering UFMG Brazil Department of Computing CEFET Brazil

ISBN: (纸本)9783932182884

A controlled fixed wing unmanned aerial vehicle is modeled based on a simplified low dimensional nonlinear dynamical system with additive disturbances. The guidance strategy proposed on a previous work is extended for the accomplishment of more complex flight missions. The trajectory is composed by subsequent targets or the concatenation of arcs of circumferences that compose the goal mission. The strategy seems to be robust to additive perturbations representing norm bounded uncertainties on the execution of the compound mission by the UAV. Simulations are provided on area mapping and border patrol missions on the map of the city of Belo Horizonte. © 31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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Spectral Model for Soybean Yield Estimate Using MODIS/EVI Data

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International Journal of Geosciences 2013年第9期4卷 1233-1241页

作者： Anibal Gusso Jorge Ricardo Ducati Mauricio Roberto Veronez Damien Arvor Luiz Gonzaga da Silveira Jr. Environmental Engineering UNISINOSSao LeopoldoBrazil Remote Sensing Center and Astronomy Department UFRGSPorto AlegreBrazil Graduate Program in Geology UNISINOSSao LeopoldoBrazil Institut de Recherche Pour le Developpement(IRD) MontpellierFrance Graduate Program in Applied Computing UNISINOSSao LeopoldoBrazil

Attaining reliable and timely agricultural estimates is very important everywhere, and in Brazil, due to its characteristics, this is especially true. In this study, estimations of crop production were made based on the temporal profiles of the Enhanced Vegetation Index (EVI) obtained from Moderate Resolution Imaging Spectroradiometer (MODIS) images. The objective was to evaluate the coupled model (CM) performance of crop area and crop yield estimates based solely on MODIS/EVI as input data in Rio Grande do Sul State, which is characterized by high variability in seasonal soybean yields, due to different crop development conditions. The resulting production estimates from CM were compared to official agricultural statistics of Brazilian Institute of Geography and Statistics (IBGE) and the National Company of Food Supply (CONAB) at different levels from 2000/2001 to 2010/2011 crop years. Results obtained with CM indicate that its application is able to generate timely production estimates for soybean both at municipality and local levels. Validation estimates with CM at State level obtained R2 = 0.95. Combining all cropping years at municipality level, estimates were highly correlated to official statistics from IBGE, with R2 = 0.91 and RMSD = 10,840 tons. Spatially interpolated comparisons of yield maps obtained from the CM estimates and IBGE data also showed visual similarity in their spatial distribution. Local level comparisons were performed and presented R2 = 0.95. Implications of this work point out that time-series analysis of production estimates are able to provide anticipated spatial information prior to the soybean harvest.

关键词： Remote Sensing Coupled Model Soy Yield Forecast Satellite Images

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User interface modelling by implementing storytelling on Sundanese cultural introduction media for early childhood using child-centered design method 3

User interface modelling by implementing storytelling on Sun...

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3rd Annual Applied Science and Engineering Conference, AASEC 2018

作者： Ayuningtyas, O.D.J. Effendy, V. Kaburuan, E.R. School of Computing Universitas Telkom Jawa Barat Bandung Indonesia Graduate Program Universitas Bina Nusantara Jakarta Indonesia

The introduction of local culture to early age children in Indonesia is very necessary to maintain its sustainability. Several institutions of Early Childhood Education began to introduce local culture to their students, but the limited time and place to be a separate constraint for the activity. Digital media can solve this problem by presenting an introduction to local culture which can be accessed without time and place limitation, but there are some problems of using the existing application because children have their own characteristics and different ways of absorbing a knowledge. From the observation of an early childhood, it is known that children more easily absorb knowledge through playing game and listening to the story telling. Story telling invites children to develop their imagination and more memorable, so that information can be better absorbed. To accommodate the learning need, this research developed the User Interface (UI) by combining a game and a story telling. This modelling involves the participation of early childhood and companions using child-centered design (CCD) methods. The UI model then tested using System Usability Scale (SUS) to measure its usability score and obtained 85.833, which means the children feel satisfied in using the UI model. © Published under licence by IOP Publishing Ltd.

关键词： Digital storage

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Session Based Logging (SBL) for IP-traceback on network forensics

Session Based Logging (SBL) for IP-traceback on network fore...

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2006 International Conference on Security and Management, SAM'06

作者： Demir, Omer Ji, Ping Kim, Jinwoo Graduate Program on Forensics Computing John Jay College of Criminal Justice City University of New York United States

ISBN: (纸本)1601320019

The widely acknowledged problem of reliably identifying the origin of information in cyberspace has been the subject of much research. Due to the nature of the Internet protocol, the source IP can be easily falsified which results in numerous problems including infamous denial of service attacks. The combination of smart devices with powerful processing capabilities once observed only in mainframe computers decades ago and the presence of the Internet which allows communications between all those devices exacerbate the problem. In this paper, we propose a novel technique called Session Based Logging (SBL) for simple and effective IP-Traceback and logging mechanism. SBL is easy to implement and also has significant advantage of saving storage space over previously proposed schemes. Moreover the SBL approach has clear edge under sensitive privacy regulations since it does not need to capture detailed contents of each individual communication session. Experimental results show its potential and ease of execution from free of any agent software installation on the logging machine. The proposed SBL scheme on this paper currently supports only TCP sessions but we believe this approach could be further extended to UDP connections which have many inherent network security problems.

关键词： Internet protocols

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ProFog: A Proactive Elasticity Model for Fog computing-based IoT Applications 17

ProFog: A Proactive Elasticity Model for Fog Computing-based...

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17th International Conference on Web Information Systems and Technologies, WEBIST 2021

作者： Barth, Guilherme Gabriel da Rosa Righi, Rodrigo da Costa, Cristiano André Rodrigues, Vinicius Facco Applied Computing Graduate Program Universidade do Vale do Rio dos Sinos São Leopoldo Brazil

ISBN: (纸本)9789897585364

Today, streaming, Artificial Intelligence, and the Internet of Things (IoT) are being some of the main drivers to accelerate process automation in various companies. These technologies are often connected to critical tasks, requiring reliable and scalable environments. Although Fog computing has been on the rise as an alternative to address those challenges, we perceive a gap in the literature related to adaptability on the number of resources on both cloud and fog layers. Multiple studies suggest different Cloud-Fog architectures for IoT implementations, but not thoroughly addressing elasticity control mechanisms. In this context, this article presents ProFog as a proactive elasticity model for IoT-based Cloud-Fog architectures. ProFog uses the ARIMA prediction model to anticipate load behaviors, so triggering scaling actions as close to when they are required as possible. This strategy allows the delivery of new resources before reaching an overloaded or underloaded state, benefiting performance, and energy saving. We developed a ProFog prototype that showed an improvement of 11.21% in energy consumption in favor of ProFog. © 2021 by SCITEPRESS – Science and Technology Publications, Lda. All rights reserved.

关键词： Internet of things

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