Search For:

Displaying 1-17 out of 17 total
Internet Workloads: Measurement, Characterization, and Modeling
Found in: IEEE Internet Computing
By Virgílio A.F. Almeida, Jussara M. Almeida
Issue Date:March 2011
pp. 15-18
<p>Workload measurement, characterization, and modeling are key steps toward the design, planning, and management of both new and maturing Internet applications and services. However, the emergence of several new applications (such as online social n...
On Popularity in the Blogosphere
Found in: IEEE Internet Computing
By Marcos André Gonçalves, Jussara M. Almeida, Luiz G.P. dos Santos, Alberto H.F. Laender, Virgílio Almeida
Issue Date:May 2010
pp. 42-49
The blogosphere's more outgoing and informal social nature provides an opportunity to exploit more socially oriented features, such as credibility and popularity, for searching, recommendation, and other tasks. In this article, the authors present evidence...
Quantitative Analysis of Strategies for Streaming Media Distribution
Found in: Web Congress, Latin American
By Marisa A. Vasconcelos, Leonardo C. da Rocha, Juliano de C. Santos, José Ismael Jr., Leonardo L. P. da Mata, Jussara M. Almeida, Wagner Meira Jr, Virgílio A. F. Almeida
Issue Date:November 2003
pp. 154
<p>Distribution of streaming media content, including live news, music and videos, is becoming increasingly popular in today?s Internet. Traditional client/server architectures are inefficient for distributing streaming media objects because of the h...
A Picture of Instagram is Worth More Than a Thousand Words: Workload Characterization and Application
Found in: 2013 IEEE International Conference on Distributed Computing in Sensor Systems (DCOSS)
By Thiago H. Silva,Pedro O.S. Vaz de Melo,Jussara M. Almeida,Juliana Salles,Antonio A.F. Loureiro
Issue Date:May 2013
pp. 123-132
Participatory sensing systems (PSSs) have the potential to become fundamental tools to support the study, in large scale, of urban social behavior and city dynamics. To that end, this work characterizes the photo sharing system Instagram, considered one of...
Visualizing the Invisible Image of Cities
Found in: 2012 IEEE International Conference on Green Computing and Communications (GreenCom)
By Thiago H. Silva,Pedro O.S. Vaz de Melo,Jussara M. Almeida,Juliana Salles,Antonio A.F. Loureiro
Issue Date:November 2012
pp. 382-389
With the recent advances in technology, we have the opportunity to study the city dynamics at a large scale. A fundamental step is to be able to sense extensive areas. Participatory sensor networks have the potential to become a very fundamental tool to st...
Characterizing Dynamic Properties of the SopCast Overlay Network
Found in: Parallel, Distributed, and Network-Based Processing, Euromicro Conference on
By Kênia Carolina Gonçalves,Alex Borges Vieira,Jussara M. Almeida,Ana Paula C. da Silva,Humberto Marques-Neto,Sérgio V.A. Campos
Issue Date:February 2012
pp. 319-326
Peer-to-Peer live video streaming systems are becoming increasingly popular. Nevertheless, in spite of various studies of client behavior aspects and system optimizations, the current knowledge about the dynamic properties of the system, particularly how t...
On the Quality of Information for Web 2.0 Services
Found in: IEEE Internet Computing
By Jussara M. Almeida, Marcos André Gonçalves, Flavio Figueiredo, Henrique Pinto, Fabiano Belem
Issue Date:November 2010
pp. 47-55
Most Web 2.0 applications let users associate textual information with multimedia content. Despite each application's lack of editorial control, these textual features are still the primary source of information for many relevant services such as search. P...
Challenges and opportunities on the large scale study of city dynamics using participatory sensing
Found in: 2013 IEEE Symposium on Computers and Communications (ISCC)
By Thiago H. Silva,Pedro O. S. Vaz de Melo,Jussara M. Almeida,Antonio A. F. Loureiro
Issue Date:July 2013
pp. 000528-000534
Cities are not identical and evolve over time, and sensing in large scale can be used to capture these differences. Research in Wireless Sensor Networks has provided several tools, techniques and algorithms to solve the problem of sensing in restricted sce...
Understanding video interactions in youtube
Found in: Proceeding of the 16th ACM international conference on Multimedia (MM '08)
By Fabricio Benevenuto, Fernando Duarte, Jussara M. Almeida, Keith W. Ross, Tiago Rodrigues, Virgilio A.F. Almeida
Issue Date:October 2008
pp. 40-42
This paper seeks understanding the user behavior in a social network created essentially by video interactions. We present a characterization of a social network created by the video interactions among users on YouTube, a popular social networking video sh...
Pricing residential broadband internet
Found in: Proceedings of the 2006 ACM CoNEXT conference (CoNEXT '06)
By Humberto T. Marques-Neto, Jussara M. Almeida, Virgilio A. F. Almeida
Issue Date:December 2006
pp. 89-97
Pricing could be used to foster fair use of Internet resources and help to control backbone congestion. This paper presents a mechanism for pricing residential broadband Internet services based on the following information: user subscription, ISP backbone ...
Characterizing broadband user behavior
Found in: Proceedings of the 2004 ACM workshop on Next-generation residential broadband challenges (NRBC '04)
By Humberto T. Marques, Jussara M. Almeida, Leonardo C. D. Rocha, Pedro H. C. Guerra, Virgilio A. F. Almeida, Wagner Meira
Issue Date:October 2004
pp. 11-18
This paper presents a characterization of broadband user behavior from a Internet service provider. Users are broken into two major categories: residential and Small-Office/Home-Office (SOHO). For each user category, the characterization is performed along...
GreenMeter: a tool for assessing the quality and recommending tags for web 2.0 applications
Found in: Proceedings of the 34th international ACM SIGIR conference on Research and development in Information (SIGIR '11)
By Dilson A. Guimaraes, Fabiano M. Belem, Jussara M. Almeida, Marcos A. Goncalves, Raquel Prates, Saulo M.R. Ricci
Issue Date:July 2011
pp. 1279-1280
We present GreenMeter, a tool for assessing the quality and recommending tags for Web 2.0 content. Its goal is to improve tag quality and the effectiveness of various information services (e.g., search, content recommendation) that rely on tags as data sou...
Mobile dynamic content distribution networks
Found in: Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems (MSWiM '04)
By Daniel S. Mendes, Geraldo R. Mateus, Jussara M. Almeida, Wagner M. Aioffi
Issue Date:October 2004
pp. 87-94
Mobile networks are becoming increasingly popular as means for distributing inform tion to large number of users. In comparison to wired networks, mobile networks distinguished by potentially much higher variability in demand due to user mobility. Most pre...
On the use of participatory sensing to better understand city dynamics
Found in: Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication (UbiComp '13 Adjunct)
By Antonio A.F. Loureiro, Jussara M. Almeida, Pedro O.S. Vaz de Melo, Thiago H. Silva
Issue Date:September 2013
pp. 1347-1350
In this position paper we argue that certain types of social media systems, such as Instagram and Foursquare, can act as valuable source of sensing, providing access to important characteristics of urban locations and urban social behavior. We discuss some...
The problem of cooperation among different wireless sensor networks
Found in: Proceedings of the 11th international symposium on Modeling, analysis and simulation of wireless and mobile systems (MSWiM '08)
By Antonio A.F. Loureiro, Felipe D. da Cunha, Jussara M. Almeida, Pedro O.S. Vaz de Melo, Raquel A.F. Mini
Issue Date:October 2008
pp. 286-293
An important issue in the design of a wireless sensor network (WSN) is to devise techniques to make efficient use of its energy, and thus, extend its lifetime. When two WSNs are deployed at the same place and their sensors cooperate with the other networks...
Characterization of user access to streaming media files
Found in: Proceedings of the 2001 ACM SIGMETRICS international conference on Measurement and modeling of computer systems (SIGMETRICS '01)
By Jeffrey Krueger, Jussara M. Almeida, Mary K. Vernon
Issue Date:June 2001
pp. 261-269
Immersive environments are those that surround users in an artificial world. These environments consist of a composition of various types of immersidata: unique data types that are combined to render a virtual experience. Acquisition, for storage and futur...
Analysis of educational media server workloads
Found in: Proceedings of the 11th international workshop on Network and operating systems support for digital audio and video (NOSSDAV '01)
By Derek L. Eager, Jeffrey Krueger, Jussara M. Almeida, Mary K. Vernon
Issue Date:January 2001
pp. 21-30
This paper presents an extensive analysis of the client workloads for educational media servers at two major U.S. universities. The goals of the analysis include providing data for generating synthetic workloads, gaining insight into the design of stream...