Articles

What to expect, and how to improve online discussion forums: the instructors’ perspective

Online discussion forums are asynchronous communication tools that are widely used in Learning Management Systems. However, instructors and students face various difficulties, and instructors lack a guide on w...

Authors: Dhanielly P. R. de Lima, Marco A. Gerosa, Tayana U. Conte and José Francisco de M. Netto

DOD-ETL: distributed on-demand ETL for near real-time business intelligence

The competitive dynamics of the globalized market demand information on the internal and external reality of corporations. Information is a precious asset and is responsible for establishing key advantages to ...

Authors: Gustavo V. Machado, Ítalo Cunha, Adriano C. M. Pereira and Leonardo B. Oliveira

Evaluating CRoS-NDN: a comparative performance analysis of a controller-based routing scheme for named-data networking

The huge amount of content names available in Named-Data Networking (NDN) challenges both the required routing table size and the techniques for locating and forwarding information. Content copies and content ...

Authors: João Vitor Torres, Igor Drummond Alvarenga, Raouf Boutaba and Otto Carlos Muniz Bandeira Duarte

Upgrading a high performance computing environment for massive data processing

High-performance computing (HPC) and massive data processing (Big Data) are two trends that are beginning to converge. In that process, aspects of hardware architectures, systems support and programming paradi...

Authors: Lucas M. Ponce, Walter dos Santos, Wagner Meira Jr., Dorgival Guedes, Daniele Lezzi and Rosa M. Badia

Better safe than sorry: a vehicular traffic re-routing based on traffic conditions and public safety issues

Vehicular traffic re-routing is the key to provide better traffic mobility. However, taking into account just traffic-related information to recommend better routes for each vehicle is far from achieving the d...

Authors: Allan M. de Souza, Torsten Braun, Leonardo C. Botega, Raquel Cabral, Islene C. Garcia and Leandro A. Villas

Clustering and reliability-driven mitigation of routing attacks in massive IoT systems

As an integral component of the 5G communications, the massive Internet of Things (IoT) are vulnerable to various routing attacks due to their dynamic infrastructure, distinct computing resources, and heteroge...

Authors: Aldri L. Santos, Christian A. V. Cervantes, Michele Nogueira and Burak Kantarci

Detecting web attacks with end-to-end deep learning

Web applications are popular targets for cyber-attacks because they are network-accessible and often contain vulnerabilities. An intrusion detection system monitors web applications and issues alerts when an a...

Authors: Yao Pan, Fangzhou Sun, Zhongwei Teng, Jules White, Douglas C. Schmidt, Jacob Staples and Lee Krause

Efficient data dissemination protocol based on complex networks’ metrics for urban vehicular networks

Services that aim to make the current transportation system more secure, sustainable, and efficient constitute the Traffic Management Systems (TMS). Vehicular Ad hoc Networks (VANETs) exert a strong influence ...

Authors: Joahannes B. D. da Costa, Allan M. de Souza, Denis Rosário, Eduardo Cerqueira and Leandro A. Villas

Thematic series on Social Network Analysis and Mining

Social networks were first investigated in social, educational and business areas. Academic interest in this field though has been growing since the mid twentieth century, given the increasing interaction amon...

Authors: Rodrigo Pereira dos Santos and Giseli Rabello Lopes

A participatory sensing framework to classify road surface quality

Participatory sensing networks rely on gathering personal data from mobile devices to infer global knowledge. Participatory sensing has been used for real-time traffic monitoring, where the global traffic cond...

Authors: Davidson E. Nunes and Vinicius F. S. Mota

An optimization-based approach for efficient network monitoring using in-band network telemetry

In recent years, as a result of the proliferation of non-elastic services and the adoption of novel paradigms, monitoring networks with high level of detail is becoming crucial to correctly identify and charac...

Authors: Jonatas Adilson Marques, Marcelo Caggiani Luizelli, Roberto Irajá Tavares da Costa Filho and Luciano Paschoal Gaspary

Towards business partnership recommendation using user opinion on Facebook

The identification of strategic business partnerships can potentially provide competitive advantages for businesses; however, due to the dynamics and uncertainty present in business environments, this task cou...

Authors: Diego P. Tsutsumi, Amanda T. Fenerich and Thiago H. Silva

A semantic-based discovery service for the Internet of Things

With the Internet of Things (IoT), applications should interact with a huge number of devices and retrieve context data produced by those objects, which have to be discovered and selected a priori. Due to the ...

Authors: Porfírio Gomes, Everton Cavalcante, Thais Batista, Chantal Taconet, Denis Conan, Sophie Chabridon, Flavia C. Delicato and Paulo F. Pires

Multi-objective routing aware of mixed IoT traffic for low-cost wireless Backhauls

The futuristic wireless networks expects to provide adequate support for distinct kind of applications, their diverse requirements, and scenarios for future Internet systems, such as Internet of Things based o...

Authors: Vinícius N. Medeiros, Bruno Silvestre and Vinicius C. M. Borges

DG2CEP: a near real-time on-line algorithm for detecting spatial clusters large data streams through complex event processing

Spatial concentrations (or spatial clusters) of moving objects, such as vehicles and humans, is a mobility pattern that is relevant to many applications. Fast detection of this pattern and its evolution, e.g.,...

Authors: Marcos Roriz Junior, Bruno Olivieri and Markus Endler

Managing to release early, often and on time in the OpenStack software ecosystem

The dictum of “Release early, release often.” by Eric Raymond as the Linux modus operandi highlights the importance of release management in open source software development. However, there are very few empiri...

Authors: José Apolinário Teixeira and Helena Karsten

An agile and effective network function virtualization infrastructure for the Internet of Things

The processing and power-consumption constraints of the Internet of Things devices hinder them to offer more complex network services than the simple data transmission in smart city scenarios. The lack of comp...

Authors: Diogo Menezes Ferrazani Mattos, Pedro Braconnot Velloso and Otto Carlos Muniz Bandeira Duarte

GARSAaaS: group activity recognition and situation analysis as a service

Human activity recognition using embedded mobile and embedded sensors is becoming increasingly important. Scaling up from individuals to groups, that is, group activity recognition, has attracted significant a...

Authors: Amin B. Abkenar, Seng W. Loke, Arkady Zaslavsky and Wenny Rahayu

Improving microservice-based applications with runtime placement adaptation

Microservices are a popular method to design scalable cloud-based applications. Microservice-based applications (μApps) rely on message passing for communication and to decouple each microservice, allowing the lo...

Authors: Adalberto R. Sampaio Jr., Julia Rubin, Ivan Beschastnikh and Nelson S. Rosa

Adaptive placement & chaining of virtual network functions with NFV-PEAR

The design of flexible and efficient mechanisms for proper placement and chaining of virtual network functions (VNFs) is key for the success of Network Function Virtualization (NFV). Most state-of-the-art solu...

Authors: Gustavo Miotto, Marcelo Caggiani Luizelli, Weverton Luis da Costa Cordeiro and Luciano Paschoal Gaspary

SCOPE: self-adaptive and policy-based data management middleware for federated clouds

A federated cloud storage setup which integrates and utilizes storage resources from multiple cloud storage providers has become an increasingly popular and attractive paradigm for the persistence tier in clou...

Authors: Ansar Rafique, Dimitri Van Landuyt, Eddy Truyen, Vincent Reniers and Wouter Joosen

Pseudonymization risk analysis in distributed systems

In an era of big data, online services are becoming increasingly data-centric; they collect, process, analyze and anonymously disclose growing amounts of personal data in the form of pseudonymized data sets. I...

Authors: Geoffrey K. Neumann, Paul Grace, Daniel Burns and Mike Surridge

Networking architectures and protocols for smart city systems

The smart city model is used by many organizations for large cities around the world to significantly enhance and improve the quality of life of the inhabitants, improve the utilization of city resources, and ...

Authors: Imad Jawhar, Nader Mohamed and Jameela Al-Jaroodi

Is it possible to describe television series from online comments?

Due to the omnipresence of the Internet and Social Media in current society, it has become easy to find groups or communities of people discussing the most varied subjects in discussion forums, social network ...

Authors: Túlio C. Loures, Pedro O. S. Vaz de Melo and Adriano A. Veloso

The computer for the 21st century: present security & privacy challenges

Decades went by since Mark Weiser published his influential work on the computer of the 21st century. Over the years, some of the UbiComp features presented in that paper have been gradually adopted by industr...

Authors: Leonardo B. Oliveira, Fernando Magno Quintão Pereira, Rafael Misoczki, Diego F. Aranha, Fábio Borges, Michele Nogueira, Michelle Wangham, Min Wu and Jie Liu

Graph mining for the detection of overcrowding and waste of resources in public transport

The imbalance between the quantity of supply and demand in public transport systems causes a series of disruptions in large metropolises. While extremely crowded vehicles are uncomfortable for passengers, virt...

Authors: Carlos Caminha, Vasco Furtado, Vládia Pinheiro and Caio Ponte

A user-driven free speech application for anonymous and verified online, public group discourse

Online social networks are major hubs of communications that are used to share information by societies worldwide. However, the ability to freely communicate on these platforms is increasingly restricted in co...

Authors: Michael Nekrasov, Danny Iland, Miriam Metzger, Lisa Parks and Elizabeth Belding

Metrics for network power based on Castells’ Network Theory of Power: a case study on Brazilian elections

The identification of power groups that act within the political structure is a tool for citizens and also a challenging research topic as an unstable and complex force of interests system. This paper presents...

Authors: Letícia Verona, Jonice Oliveira, José Vitor da Cunha Hisse and Maria Luiza Machado Campos

Who is really in my social circle?

Tie strength allows to classify social relationships and identify different types of them. For instance, social relationships can be classified as persistent and similar based respectively on the regularity wi...

Authors: Jeancarlo C. Leão, Michele A. Brandão, Pedro O. S. Vaz de Melo and Alberto H. F. Laender

Self-adaptive authorisation in OpenStack cloud platform

Although major advances have been made in protection of cloud platforms against malicious attacks, little has been done regarding the protection of these platforms against insider threats. This paper looks int...

Authors: Carlos Eduardo Da Silva, Thomás Diniz, Nelio Cacho and Rogério de Lemos

Using sentiment analysis to define twitter political users’ classes and their homophily during the 2016 American presidential election

This paper proposes an analysis of political homophily among Twitter users during the 2016 American Presidential Election. We collected 4.9 million tweets of 18,450 users and their contact network from August ...

Authors: Josemar A. Caetano, Hélder S. Lima, Mateus F. Santos and Humberto T. Marques-Neto

Organizing for openness: six models for developer involvement in hybrid OSS projects

This article examines organization and governance of commercially influenced Open Source Software development communities by presenting a multiple-case study of six contemporary, hybrid OSS projects. The findi...

Authors: Hanna Mäenpää, Simo Mäkinen, Terhi Kilamo, Tommi Mikkonen, Tomi Männistö and Paavo Ritala

B-space: dynamic management and assurance of open systems of systems

Connected cars, freely configurable operating rooms, or autonomous harvesting fleets: dynamically emerging open systems of systems will shape a new generation of systems opening up a vast potential for new kin...

Authors: Daniel Schneider and Mario Trapp

Fog orchestration for the Internet of Everything: state-of-the-art and research challenges

Recent developments in telecommunications have allowed drawing new paradigms, including the Internet of Everything, to provide services by the interconnection of different physical devices enabling the exchang...

Authors: Karima Velasquez, David Perez Abreu, Marcio R. M. Assis, Carlos Senna, Diego F. Aranha, Luiz F. Bittencourt, Nuno Laranjeiro, Marilia Curado, Marco Vieira, Edmundo Monteiro and Edmundo Madeira

Conflict-free rerouting scheme through flow splitting for virtual networks using switches

The weaknesses of the Internet led to the creation of a new network paradigm – network virtualization. Virtualization is a very successful technique for sharing and reusing resources, which results in higher e...

Authors: Vianney Kengne Tchendji, Yannick Florian Yankam and Jean Frédéric Myoupo

A comprehensive survey on machine learning for networking: evolution, applications and research opportunities

Machine Learning (ML) has been enjoying an unprecedented surge in applications that solve problems and enable automation in diverse domains. Primarily, this is due to the explosion in the availability of data,...

Authors: Raouf Boutaba, Mohammad A. Salahuddin, Noura Limam, Sara Ayoubi, Nashid Shahriar, Felipe Estrada-Solano and Oscar M. Caicedo

A new approach to deploy a self-adaptive distributed firewall

Distributed firewall systems emerged with the proposal of protecting individual hosts against attacks originating from inside the network. In these systems, firewall rules are centrally created, then distribut...

Authors: Edmilson P. da Costa Júnior, Carlos Eduardo da Silva, Marcos Pinheiro and Silvio Sampaio

Insights on the large-scale deployment of a curated Web-of-Trust: the Debian project’s cryptographic keyring

The Debian project is one of the largest free software undertakings worldwide. It is geographically distributed, and participation in the project is done on a voluntary basis, without a single formal employee ...

Authors: Gunnar Wolf and Víctor González Quiroga

Recovering user-interactions of Rich Internet Applications through replaying of HTTP traces

In this paper, we study the “Session Reconstruction” problem which is the reconstruction of user interactions from recorded request/response logs of a session. The reconstruction is especially useful when the ...

Authors: Salman Hooshmand, Gregor V. Bochmann, Guy-Vincent Jourdan, Russell Couturier and Iosif-Viorel Onut

Thematic series on Verification and Composition for the Internet of Services and Things

The Internet of Services and Things is characterized as a distributed computing environment that will be populated by a large number of software services and things. Within this context, software systems will ...

Authors: Marco Autili, Dimitra Giannakopoulou and Massimo Tivoli

Security and privacy aware data aggregation on cloud computing

The use of cloud computing has become common due to advantages such as low cost and sizing of computing resources according to demand. However, it also raises security and privacy concerns, because critical da...

Authors: Leandro V. Silva, Pedro Barbosa, Rodolfo Marinho and Andrey Brito

EZ-AG: structure-free data aggregation in MANETs using push-assisted self-repelling random walks

This paper describes EZ-AG, a structure-free protocol for duplicate insensitive data aggregation in MANETs. The key idea in EZ-AG is to introduce a token that performs a self-repelling random walk in the netwo...

Authors: V. Kulathumani, M. Nakagawa and A. Arora

BROAD-RSI – educational recommender system using social networks interactions and linked data

There are several educational resources distributed in different repositories that address to a wide range of subjects and different educational goals. The proper choice of these educational resources is a cha...

Authors: Crystiam Kelle Pereira, Fernanda Campos, Victor Ströele, José Maria N. David and Regina Braga

Support mechanisms provided by FLOSS foundations and other entities

Foundations function as a vital institutional support infrastructure for many of the most successful open-source projects, but the different roles played by these support entities are understudied in Free/Libr...

Authors: Juho Lindman and Imed Hammouda

High-performance IP lookup using Intel Xeon Phi: a Bloom filters based approach

IP lookup is a core operation in packet forwarding, which is implemented using a Longest Prefix Matching (LPM) algorithm to find the next hop for an input address. This work proposes and evaluates the use of p...

Authors: Alexandre Lucchesi, André C. Drummond and George Teodoro

A controller design for mitigation of passive system identification attacks in networked control systems

The literature regarding attacks in Networked Control Systems (NCS) indicates that covert and accurate attacks must be designed based on an accurate knowledge about the model of the attacked system. In this co...

Authors: Alan O. de Sá, Luiz F. R. da Costa Carmo and Raphael C. S. Machado

Environment for integration of distributed heterogeneous computing systems

Connecting multiple and heterogeneous hardware devices to solve problems raises some challenges, especially in terms of interoperability and communications management. A distributed solution may offer many adv...

Authors: Thiago W. B. Silva, Daniel C. Morais, Halamo G. R. Andrade, Antonio M. N. Lima, Elmar U. K. Melcher and Alisson V. Brito

A framework for searching encrypted databases

Cloud computing is a ubiquitous paradigm responsible for a fundamental change in the way distributed computing is performed. The possibility to outsource the installation, maintenance and scalability of server...

Authors: Pedro G. M. R. Alves and Diego F. Aranha

Providing privacy on the tuple space model

Conceptually, tuple spaces are shared memory objects that provide operations to store and retrieve ordered sets of data, called tuples. Tuples stored in a tuple space are accessed by the contents of their fiel...

Authors: Edson Floriano, Eduardo Alchieri, Diego F. Aranha and Priscila Solis

Free and open source software development: the end of the teenage years

Authors: Igor Steinmacher, Gregorio Robles, Brian Fitzgerald and Anthony Wasserman