@article{10.1145/3412326,
author = {Oliveira, Lucas Santos De and Vaz-de-Melo, Pedro O. S. and Amaral, Marcelo S. and Pinho, Jos\'{e} Ant\^{o}nio G.},
title = {Do Politicians Talk about Politics? Assessing Online Communication Patterns of Brazilian Politicians},
year = {2020},
issue_date = {October 2020},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
volume = {3},
number = {4},
issn = {2469-7818},
url = {https://doi.org/10.1145/3412326},
doi = {10.1145/3412326},
journal = {ACM Transactions on Social Computing},
month = sep,
articleno = {19},
numpages = {28},
keywords = {congresspeople, politics, Twitter, Brazil, social media}
}

@inproceedings{Silva2019,
address = {Taipei, Taiwan},
author = {Silva, M{\'{a}}rcio and Oliveira, Lucas Santos De and Vaz de Melo, Pedro O. S. and Benevenuto, Fabr{\'{i}}cio and Andreau, Athanasios and Goga, Oana},
booktitle = {Proceedings of The Web Conference 2020},
doi = {10.1145/3366423.3380109},
isbn = {978-1-4503-7023-3/20/04},
keywords = {acm reference format,athanasios andreou,facebook ads,lucas santos de oliveira,misinformation,m{\'{a}}rcio silva,pedro olmo,political advertisement},
number = {20--24April 2018},
publisher = {ACM},
title = {{Facebook Ads Monitor : An Independent Auditing System for Political Ads on Facebook}},
year = {2020}
}

@inproceedings{oliveira2019a,
address = {Miami Beach, FL, USA},
author = {Oliveira, Lucas Santos De and Vaz De Melo, Pedro O S and Viana, Aline Carneiro},
booktitle = {The 17th ACM International Symposium on Mobility Management and Wireless Access (MobiWac '19)},
doi = {10.1145/3345770.3356744},
isbn = {9781450369053},
keywords = {acm reference format,and aline carneiro viana,graph-based,important locations,lucas santos de oliveira,mobility,pedro o,power relation,s,vaz de melo},
title = {{Measuring Power Relations Among Locations From Mobility Data}},
year = {2019}
}

@article{Oliveira2018,
abstract = {Since June 2013, when Brazil faced the largest and most significant mass protests in a generation, a political crisis is in course. In midst of this crisis, Brazilian politicians use social media to communicate with the electorate in order to retain or to grow their political capital. The problem is that many controversial topics are in course and deputies may prefer to avoid such themes in their messages. To characterize this behavior, we propose a method to accurately identify political and non-political tweets independently of the deputy who posted it and of the time it was posted. Moreover, we collected tweets of all congressmen who were active on Twitter and worked in the Brazilian parliament from October 2013 to October 2017. To evaluate our method, we used word clouds and a topic model to identify the main political and non-political latent topics in parliamentarian tweets. Both results indicate that our proposal is able to accurately distinguish political from non-political tweets. Moreover, our analyses revealed a striking fact: more than half of the messages posted by Brazilian deputies are non-political.},
archivePrefix = {arXiv},
arxivId = {1805.01589},
author = {Oliveira, Lucas S. and de Melo, Pedro O. S. Vaz and Amaral, Marcelo S. and Pinho, José Antônio. G.},
eprint = {1805.01589},
number = {Icwsm},
pages = {664--667},
title = {{When Politicians Talk About Politics: Identifying Political Tweets of Brazilian Congressmen}},
url = {http://arxiv.org/abs/1805.01589},
year = {2018}
}

Since June 2013, when Brazil faced the largest and most significant mass protests in a generation, a political crisis is in course. In midst of this crisis, Brazilian politicians use social media to communicate with the electorate in order to retain or to grow their political capital. The problem is that many controversial topics are in course and deputies may prefer to avoid such themes in their messages. To characterize this behavior, we propose a method to accurately identify political and non-political tweets independently of the deputy who posted it and of the time it was posted. Moreover, we collected tweets of all congressmen who were active on Twitter and worked in the Brazilian parliament from October 2013 to October 2017. To evaluate our method, we used word clouds and a topic model to identify the main political and non-political latent topics in parliamentarian tweets. Both results indicate that our proposal is able to accurately distinguish political from non-political tweets. Moreover, our analyses revealed a striking fact: more than half of the messages posted by Brazilian deputies are non-political.

@inproceedings{Oliveira2017,
address = {New York, New York, USA},
author = {Oliveira, Lucas Santos De and {Vaz Melo}, Pedro O.S.},
booktitle = {Proceedings of the 23rd Brazillian Symposium on Multimedia and the Web - WebMedia '17},
doi = {10.1145/3126858.3131590},
isbn = {9781450350969},
keywords = {s entropy,shannon,social network,text relevance,tf-idf,twitter},
pages = {465--468},
publisher = {ACM Press},
title = {{How to Find the Relevant Words Politicians Use in Twitter?}},
year = {2017}
}

@article{Applications2017,
author = {Applications, Ghz Millimeter-wave Wlan and Maniçoba, Robson H C and Lovato, Agnaldo V and Guimarães, Marcelo A and Oliveira, Lucas S De and Santana, Murilo S and Santos, Alex F and Oliveira, Alexandre M De and Assis, Karcius D R},
keywords = {combined element,frequency selective surface,millimeter-wave,wlan},
pages = {50--56},
title = {{A Combined Element Based Frequency Selective Surface for 60 GHz Millimeter-Wave WLAN Applications}},
url = {http://www.ijmer.com/papers/Vol7{\_}issue8/Version-1/F7815056.pdf},
volume = {7},
year = {2017}
}

@article{ccsa,
	author = {Marcelo Santos Amaral e José Gomes de Pinho e Lucas Santos de Oliveira e Israel dos Santos Aguiar},
	title = { O Congresso nas Redes Sociais: uso do Twitter por parlamentares brasileiros},
	journal = {Cadernos de Ciências Sociais Aplicadas},
	year = {2016},
	keywords = {},
	abstract = {O Twitter tem atraído a atenção de políticos e pesquisadores, desde que campanhas políticas demonstraram sua relevância no meio digital. Enquanto parte de uma pesquisa sobre o uso político das mídias sociais, o objetivo deste trabalho é fazer uma descrição inicial sobre o uso do Twitter por Deputados e Senadores. Foram coletadas e analisadas informações sobre 512 contas parlamentares em 20 de dezembro de 2013. Os resultados revelam os perfis de uso dos parlamentares no Twitter, a interação entre os partidos políticos neste ambiente virtual e compreendem uma descrição deste quadro empírico.},
	issn = {2358-1212},	url = {http://periodicos2.uesb.br/index.php/ccsa/article/view/2088}
}

O Twitter tem atraído a atenção de políticos e pesquisadores, desde que campanhas políticas demonstraram sua relevância no meio digital. Enquanto parte de uma pesquisa sobre o uso político das mídias sociais, o objetivo deste trabalho é fazer uma descrição inicial sobre o uso do Twitter por Deputados e Senadores. Foram coletadas e analisadas informações sobre 512 contas parlamentares em 20 de dezembro de 2013. Os resultados revelam os perfis de uso dos parlamentares no Twitter, a interação entre os partidos políticos neste ambiente virtual e compreendem uma descrição deste quadro empírico.

@misc{amaral2014congresso,
  title={O Congresso nas Redes Sociais: uso do Twitter por parlamentares brasileiros},
  author={AMARAL, Marcelo S and de Pinho, Jos{\'e} Antonio Gomes and de Oliveira, Lucas Santos and dos Santos Aguiar, Israel},
  journal={ENCONTRO DA ASSOCIA{\c{C}}{\~A}O DE P{\'O}S-GRADUA{\c{C}}{\~A}O EM ADMINISTRA{\c{C}}{\~A}O, XXXVIII},
  year={2014},
  publisher={Anpad Rio de Janeiro}
}

@article{de2013analise,
author = {de Andrade, Joabe Ara{\'{u}}jo and Mani{\c{c}}oba, Robson Hebraico Cipriano and Guimarães, Marcelo Alves and dos Santos, Alex Ferreira and Lovato, Agnaldo Volpe and de Oliveira, Lucas Santos and Santana, Murilo Silva},
journal = {REAVI-Revista Eletrônica do Alto Vale do Itajaí},
number = {2},
pages = {74--86},
title = {{AN{\{}{\'{A}}{\}}LISE DA QUALIDADE DE REDES PLC POR MEIO DA APLICAÇÃO DO SERVIÇO VOIP}},
volume = {2},
year = {2013}
}

@article{falcao2013classification,
author = {Falc{\~{a}}o, Her{\'{a}}clito Santos and Lovato, Agnaldo Volpe and dos Santos, Alex Ferreira and de Oliveira, Lucas Santos},
journal = {Revista de Sistemas de Informação da FSMA},
number = {12},
pages = {41--48},
title = {{Classification of Parking Spots Using Multilayer Perceptron Networks}},
year = {2013}
}

@inproceedings{Souza2012,
abstract = {Awareness is a natural human characteristic. However, in a virtual environment, the perception is impaired due to systems limitations. Social networks are systems which many interactions among users take place and it becomes necessary to provide awareness support. There is no standard to give its support and each social network provides it in your own way. This paper presents a domain analysis using the FODA method, based on the 3C collaboration model (communication, coordination and cooperation) and the types of awareness (social, workspace and activities) to classify the features found.},
author = {de Souza, Vinicius Barbosa and de Oliveira, Lucas Santos},
booktitle = {2012 Brazilian Symposium on Collaborative Systems},
doi = {10.1109/SBSC.2012.23},
isbn = {978-1-4673-4696-2},
keywords = {3C collaboration model,Collaborative software,Collaborative work,Computational modeling,FODA,FODA method,Face,Software,Web 2.0,activity awareness,awareness,collaboration,communication,cooperation,coordination,domain analysis,natural human characteristic,perception,social awareness,social networking,social networking (online),social networks,virtual environment,workspace awareness},
pages = {163--167},
publisher = {IEEE},
shorttitle = {Collaborative Systems (SBSC), 2012 Brazilian Sympo},
title = {{Domain Analysis for Mechanism of Awareness in Social Networking in the Web 2.0}},
url = {http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6391743},
year = {2012}
}

Awareness is a natural human characteristic. However, in a virtual environment, the perception is impaired due to systems limitations. Social networks are systems which many interactions among users take place and it becomes necessary to provide awareness support. There is no standard to give its support and each social network provides it in your own way. This paper presents a domain analysis using the FODA method, based on the 3C collaboration model (communication, coordination and cooperation) and the types of awareness (social, workspace and activities) to classify the features found.

@inproceedings{Oliveira2012,
abstract = {Researchers and developers still replicate ideas with low reuse when developing Web 2.0 applications. A domain engineering identify and document commonalities and variabilities of an application family fostering reuse. In this work, we used a domain engineering approach for content sharing features of social networks. We used as a method the {\{}FODA{\}} (Feature Oriented Domain Analysis) with patterns for computer-mediated interaction to describe the collaborative features and the {\{}3C{\}} collaboration model to classify them. To implement the commonalities, a component kit was defined and developed, based on an infrastructure named Groupware Workbench. We conducted an experiment to evaluate the artifacts generated by the domain engineering.},
author = {de Oliveira, Lucas Santos and Gerosa, Marco Aurélio},
booktitle = {Proceedings of the 18th Brazilian symposium on Multimedia and the web},
keywords = {Collaborative Systems,Groupware,Web 2.0,domain engineering,interaction patterns,social networks,3C collaboration model},
pages = {343--350},
publisher = {ACM},
series = {{\{}WebMedia{\}} '12},
title = {{A domain engineering for content sharing collaborative features}},
url = {http://doi.acm.org/10.1145/2382636.2382708},
year = {2012}
}

Researchers and developers still replicate ideas with low reuse when developing Web 2.0 applications. A domain engineering identify and document commonalities and variabilities of an application family fostering reuse. In this work, we used a domain engineering approach for content sharing features of social networks. We used as a method the \FODA\ (Feature Oriented Domain Analysis) with patterns for computer-mediated interaction to describe the collaborative features and the \3C\ collaboration model to classify them. To implement the commonalities, a component kit was defined and developed, based on an infrastructure named Groupware Workbench. We conducted an experiment to evaluate the artifacts generated by the domain engineering.

@inproceedings{SantosDeOliveira2011,
abstract = {Researchers and developers still replicate ideas with low reuse when developing Web 2.0 applications. A domain engineering identify and document communalities and variabilities of an application family fostering reuse. In this work, we used a domain engineering approach for content sharing features of social networks. We used as a method the {\{}FODA{\}} (Feature Oriented Domain Analysis) with patterns for computer-mediated interaction to describe the collaborative features and the {\{}3C{\}} collaboration model to classify them. To implement the commonalities, we defined and developed a component kit based on an infrastructure named Groupware Workbench. We conducted an experiment and a case study to evaluate the artifacts generated by the domain engineering.},
author = {{Santos De Oliveira}, Lucas and Gerosa, M. A.},
booktitle = {Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)},
keywords = {3C Collaboration Model,Collaborative Systems,Domain Engineering,Groupware,Interaction Patterns,Social Networks,Web 2.0},
pages = {142--157},
title = {{Collaborative features in content sharing web 2.0 social networks: A domain engineering based on the 3C collaboration model}},
volume = {6969 LNCS},
year = {2011}
}

Researchers and developers still replicate ideas with low reuse when developing Web 2.0 applications. A domain engineering identify and document communalities and variabilities of an application family fostering reuse. In this work, we used a domain engineering approach for content sharing features of social networks. We used as a method the \FODA\ (Feature Oriented Domain Analysis) with patterns for computer-mediated interaction to describe the collaborative features and the \3C\ collaboration model to classify them. To implement the commonalities, we defined and developed a component kit based on an infrastructure named Groupware Workbench. We conducted an experiment and a case study to evaluate the artifacts generated by the domain engineering.

@phdthesis{de2010funcionalidades,
author = {de Oliveira, Lucas Santos},
school = {Universidade de São Paulo},
title = {{Funcionalidades colaborativas no compartilhamento de conteúdo em redes sociais na Web 2.0: Uma engenharia de domínio baseada no modelo 3C de colaboração}},
year = {2010}
}

@inproceedings{rozestraten2010arquigrafia,
author = {Rozestraten, Artur Simões and Martinez, Maria Laura and Michalsky, Straus and Stafusa, Victor W and Braga, Gustavo H and Muñoz, Carlos L H and de Oliveira, L and Gerosa, M},
booktitle = {Collaborative Systems II-Simposio Brasileiro de Sistemas Colaborativos (SBSC-II), 2010 Brazilian Symposium of},
doi = {0.1109/SBSC-II.2010.17},
organization = {IEEE},
pages = {40--43},
title = {{Arquigrafia-brasil social network: Design of an online environment based on transdisciplinarity and collaboration}},
year = {2010}
}

@phdthesis{oliveira2010funcionalidades,
author = {Oliveira, L S},
school = {Dissertação de Mestrado (Ciência da Computação)--Instituto de Matem{\{}{\'{a}}{\}}tica e Estat{\{}$\backslash$'$\backslash$i{\}}stica, Universidade de S{\{}{\~{a}}{\}}o Paulo},
title = {{Funcionalidades colaborativas no compartilhamento de conte{\{}{\'{u}}{\}}do em redes sociais na Web 2.0: Uma engenharia de dom{\{}$\backslash$'$\backslash$i{\}}nio baseada no modelo 3C de colabora{\{}{\c{c}}{\}}{\{}{\~{a}}{\}}o}},
year = {2010}
}

@inproceedings{Rozestraten2010b,
abstract = {This works describes the "Arquigrafia-Brasil Social Network" which aims the development of a user centered collaborative environment to document and study Brazilian architecture through images. The components of this system are implemented using the infraestructure of the Groupware Workbrench(GW), that is free software project that provides generic components to support the development of collaborative systems.},
author = {Rozestraten, Artur Simões and Martinez, Maria Laura and Michalsky, Straus and Stafusa, Victor W and Braga, Gustavo H and Mu{\~{n}}oz, Carlos L H and Oliveira, Lucas Santos De and Gerosa, Marco Aurélio},
booktitle = {Collaborative Systems II - Simposio Brasileiro de Sistemas Colaborativos (SBSC-II), 2010 Brazilian Symposium of},
keywords = {- web 2,0,0 favorece o uso,a web2,architecture,architecture representation,colaborative environments,de ambientes sociais,engineering,photograph,resumo,social network,software,usability,user centered design},
pages = {0--3},
title = {{Arquigrafia-Brasil Social Network : Design of an Online Environment Based on Transdisciplinarity and Collaboration}},
year = {2010}
}

This works describes the "Arquigrafia-Brasil Social Network" which aims the development of a user centered collaborative environment to document and study Brazilian architecture through images. The components of this system are implemented using the infraestructure of the Groupware Workbrench(GW), that is free software project that provides generic components to support the development of collaborative systems.

@article{deengenharia,
author = {de Oliveira, Lucas Santos and Gerosa, Marco Aurélio},
title = {{Uma Engenharia de Domínio Baseada em Padrões de Interações e no Modelo 3C de Colaborações para Redes Sociais de Compartilhamento na Web 2.0}}
}