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A FIWARE-Based Component for Data Analysis in Smart Mobility Context

A FIWARE-Based Component for Data Analysis in Smart Mobility...

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IEEE First Summer School on Smart Cities (S3C)

作者： Rosangela de Fátima Pereira Marquesone Tereza Cristina Melo de Brito Carvalho Lucas Batista Guimarães Eduardo Mario Dias Laboratory of Computer Networks and Architecture - LARC Polytechnic School University of São Paulo São Paulo Brazil Department of Energy Engineering and Automation Polytechnic School University of São Paulo São Paulo Brazil

Smart mobility is an emerging concept characterized by the use of disruptive technologies, such as cloud computing, Big Data and artificial intelligence. In this paper we propose a FIWARE-based component focus on improving the data analysis process, from data generated in services and applications existing in the smart mobility context. Our proposal aims to provide features that allows the development of solutions from the industry 4.0 concept and smart cities. Firstly, we briefly contextualize these terms, then we describe the characteristics and architectural design of our FIWARE component, highlighting how it can improve the support to smart services and applications. We also present real application scenarios where this component can be applied, specially considering the Brazilian cities.

关键词： Data analysis Big Data Internet Companies Smart cities

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Inclusion of security requirements in SLA lifecycle management for cloud computing

Inclusion of security requirements in SLA lifecycle manageme...

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IEEE Workshop on Evolving Security and Privacy Requirements Engineering (ESPRE)

作者： Marco Antonio Torrez Rojas Nelson Mimura Gonzalez Fernando Sbampato Fernando Redigolo Tereza Cristina Melo de Brito Carvalho Kim Koa Nguyen Mohamed Cheriet Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR Laboratory of Computer Networks and Architecture (LARC) Universidade de São Paulo São Paulo Brasil Ecole de Technologie Superieur (ETS) Universite du Quebec Montreal Canada

Service Level Agreement (SLA) is an essential tool for managing cloud computing services. The support of the security requirements through SLA is fundamental to achieve the full potential of the cloud computing paradigm. In this paper we present how security requirements are addressed in a cloud computing SLA. Furthermore, a unified SLA lifecycle for cloud computing services is proposed. The relationship between security requirements and the lifecycle proposed is analyzed. Through the analysis, the current cloud computing security requirements scenario for the SLA context is identified in addition to its research opportunities.

关键词： Security Cloud computing Context Measurement Monitoring Proposals Contracts

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Off-body LOS and NLOS channel characterization in a mine environment

Off-body LOS and NLOS channel characterization in a mine env...

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International Conference on Electrical and Information Technologies (ICEIT)

作者： Moulay El Azhari Mourad Nedil Yassine Salih Alj Ismail Ben Mabrouk Khalida Ghanem Larbi Talbi Underground Communications Research Laboratory UQAT Val d'Or Canada Al Akhawayn University in Ifrane (AUI) Ifrane Morocco Sensor Networks and Cellular Systems (SNCS) Research Center University of Tabuk Tabuk Saudi Arabia Division Architecture des Systèmes Centre de développement des technologies avancées Algiers Algeria Department of Computer Science and Engineering University of Quebec in Outaouais (UQO) Canada

ISBN: (纸本)9781479974801

In this paper, the off-body performance of a single-input single-output (SISO) system was evaluated in Non-Line-of-Sight (NLOS) situations and compared with measurements done with a clear Line of Sight (LOS) link. The obstructed link study takes into account the human shadowing effect, usually caused by close by miners interrupting the transmitter-receiver link. Measurement campaigns were performed using Monopole antennas in an underground gold mine. The off-body channels were characterized in terms of the channel impulse response, RMS delay spread, and coherence bandwidth. The channel capacity was determined using the well-known Shannon formula for LOS and NLOS situations. The variation of the channel parameters in the different measurement scenarios was analyzed.

关键词： Delays Bandwidth Coherence Antenna measurements Loss measurement Channel capacity Shadow mapping

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Exploiting Hadoop Topology in Virtualized Environments

Exploiting Hadoop Topology in Virtualized Environments

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IEEE World Congress on Services (SERVICES)

作者： Rosangela de Fatima Pereira Walter Akio Goya Karen Langona Nelson Mimura Gonzalez Tereza Cristina Melo de Brito Carvalho Jan-Erik Mangs Azimeh Sefidcon Laboratory of Computer Networks and Architecture Escola Politecnica University of sao Paulo sao Paulo Brazil Ericsson Research Sweden Stockholm Sweden

Virtualization is a key technique to make an environment easier to manage in terms of resource allocation. MapReduce is a programming model that provides an abstraction to perform distributed computation for large datasets. Hadoop is a well-known framework that offers an open source implementation for this model. Combining Hadoop and virtualization techniques in cloud-computing environments can unveil great potential, especially for big data context. However, running MapReduce jobs on virtual machines has indicated performance issues not solved yet. In this paper we present and discuss three scenarios regarding Hadoop topology in a cloud infrastructure. The first scenario proposes to allocate Hadoop daemons in a fully virtualized environment, the second scenario presents a hybrid environment, and the third scenario suggests to virtualize only MapReduce *** also report results from a series of tests allocating Hadoop daemons in a fully virtualized environment. Results show that adding virtual machines to the cluster causes an overhead, decreases the efficiency of CPU utilization, and shortens the time slots for the MapReduce jobs.

关键词： Virtual machining Cloud computing Virtualization Hardware Resource management Virtual machine monitors

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Novel Differentiated Service Methodology Based on Constrained Allocation of Resources for Transparent WDM Backbone networks

Novel Differentiated Service Methodology Based on Constraine...

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Brazilian Symposium on computer networks and Distributed Systems (SBRC)

作者： Joana Sócrates-Dantas Regina Melo Silveira Davide Careglio José Roberto Amazonas Josep Solé-Pareta Wilson Vicente Ruggiero Laboratory of Computer Networks and Architecture (LARC) Laboratory of Communications and Signal (LCS) Escola Politécnica da Universidade de São Paulo (EPUSP) São Paulo Brazil Department of Computer Architecture (DAC) Technical University of Catalonia (UPC) Barcelona Spain

Current Internet traffic comprises diverse service requirements. Service providers differentiate connections characteristics according to demand's requirements and pricing policy. In this paper we propose a differentiated service methodology that implements constrained resources allocation according to demand's priority level for WDM networks. With our proposed mechanism higher priority connections are guaranteed a larger amount of resources, still, lower priority demands are guaranteed a minimum level of service.

关键词： Bandwidth WDM networks Multiprotocol label switching Resource management Proposals Computational modeling

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A business model for video transmission services using dynamic adaptation streaming over HTTP 9

A business model for video transmission services using dynam...

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9th Advanced International Conference on Telecommunications, AICT 2013

作者： Rodríguez, Demóstenes Zegarra Rosa, Renata Lopes Bressan, Graça Laboratory of Computer Architecture and Networks Computer and Digital System Engineering Department University of São Paulo São Paulo Brazil

ISBN: (纸本)9781612082790

A business model for video transmission services is proposed that uses the Dynamic Adaptation Streaming over HTTP (DASH) mechanism using different versions of the same video. These video versions are encoded using different parameters, such as spatial resolution or number of frames per second. The transmission of each video version depends on the capabilities of the network at the end user point. The business model proposed considers different costs for each version of video fragments transmitted. The costs of video resolution upgrade are predefined by the service provider and used during the video streaming. Also, in this model, the user can either accept or reject an upgrade. Subjective tests were performed using different spatial resolutions of the same video, in which the interest level of users to perform a video upgrade is evaluated. Furthermore, the network architecture of the proposed solution is presented and the technical feasibility to deploy the proposed solution in commercial networks is shown. As a consequence, the proposed solution can improve the earnings of the video service provider. Copyright © 2013 IARIA.

关键词： Video streaming

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Distributed Processing from Large Scale Sensor Network Using Hadoop

Distributed Processing from Large Scale Sensor Network Using...

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IEEE International Conference on Services Economics (SE)

作者： Rosangela de Fatima Pereira Marcelo Risse de Andrade Artur Carvalho Zucchi Karen Langona Walter Akio Goya Nelson Mimura Gonzalez Tereza Cristina Melo Brito de Carvalho Jan-Erik Mangs Azimeh Sefidcon Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR Laboratory of Computer Networks and Architecture Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR Laboratory of Computer Networks and Architecture University of São Paulo Brazil Ericsson Research Sweden

Big data refers to large amounts of data, normally in unstructured forms, such as text, sensor data, audio, video, log files, and more. When collecting from a large number of nodes, sensor networks can produce large data sets. Climate and sensor network data are applied to assist the decision making process in agricultural production. In this paper we present the main aspects of a prototype to test Hadoop framework applied to process climate related data sets in a cloud computing infrastructure.

关键词： Meteorology Cloud computing Distributed databases computer architecture Decision making Portals Distributed processing

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A Framework for Authentication and Authorization Credentials in Cloud Computing

A Framework for Authentication and Authorization Credentials...

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IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Nelson Mimura Gonzalez Marco Antônio Torrez Rojas Marcos Vinícius Maciel da Silva Fernando Redígolo Tereza Cristina Melo de Brito Carvalho Charles Christian Miers Mats Näslund Abu Shohel Ahmed Laboratory of Computer Networks and Architecture University of São Paulo Brazil State University of Santa Catarina Joinville Brazil Ericsson Research

Security is a key concern when adopting cloud technology. Cloud solutions include not only issues inherited from related technologies, such as virtualization and distributed computing, but also new concerns associated to complexity of the cloud ecosystem, composed by the cloud entities and their interactions. One of the concerns is related to authentication and authorization in the cloud in order to provide robust mechanisms to identify entities and establish their permissions and roles in the cloud, controlling resource usage and promoting accounting and isolation. This paper identifies the state of the art in terms of credential management focusing on the cloud ecosystem. It proposes a credential classification and a framework for studying and developing solutions in this context, unifying concepts related to cloud deployment models, service types, entities and lifecycle controls.

关键词： Cloud computing Authorization Authentication Biological system modeling Ecosystems Organizations

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Cloud Distributed Processing Using Trade Wind

Cloud Distributed Processing Using Trade Wind

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IEEE International Conference on Services Economics (SE)

作者： Nelson Mimura Gonzalez Walter Akio Goya Karen Langona Rosangela De Fatima Pereira Marcelo Risse de Andrade Artur Carvalho Zucchi Tereza Cristina Melo Brito de Carvalho Jan-Erik Mangs Azimeh Sefidcon Laboratory of Computer Networks and Architecture University of São Paulo Brazil Lab. of Comput. Networks & Archit. Universidade de Sao Paulo Sao Paulo SÃ£o Paulo BR Ericsson Research Sweden Lab. of Comput. Networks & Archit. Univ. of Sao Paulo Brazil

This paper presents the distributed processing feature for Trade Wind, a cloud deployment and management solution. The main objective of this research is to evaluate performance and feasibility of this feature for big data applications. A prototype has been created and tested in the calculation of monthly average temperature and humidity based on data from a public data set. Preliminary results show great improvement in terms of time reduction, speedup, and efficiency.

关键词： Distributed processing Clouds Information management Data handling Data storage systems Humidity Load management

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Revisiting the security of the ALRED design and two of its variants: Marvin and lettersoup

Revisiting the security of the ALRED design and two of its v...

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作者： Simplicio Jr., Marcos A. Barreto, Paulo S.L.M. Laboratory of Computer Architecture and Networks Escola Politécnica University of São Paulo 04023-900 Brazil

The Alred construction is a lightweight strategy for constructing message authentication algorithms from an underlying iterated block cipher. Even though this construction's original analyses show that it is secure against some attacks, the absence of formal security proofs in a strong security model still brings uncertainty on its robustness. In this paper, aiming to give a better understanding of the security level provided by different authentication algorithms based on this design strategy, we formally analyze two Alred variants - the Marvin message authentication code and the LetterSoup authenticated-encryption scheme, - bounding their security as a function of the attacker's resources and of the underlying cipher's characteristics. © 1963-2012 IEEE.

关键词： Authentication

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