luiz celso gomes-jr
Assistant Professor - Databases - UTFPR

| about me |

I'm an Assistant Professor at the Informatics Department of the Federal University of Technology (UTFPR). I'm a member of the ADA (Advanced Data Applications) research group at the university. My research interests are quite broad, but they all revolve around getting answers from data that won't give them up easily. I am currently working on general Data Science topics including outlier detection, complex network analysis, natural language processing, etc. I also work on Database Systems topics, such as querying models, privacy and accountability. More about that further on this page, specially in the research section.

Outside the lab, I am a rock climber, an yoga practitioner, and an barefoot/minimalist runner. I'd be up for anything outdoorsy. There is a hobbies section below as well.

My curriculum vitae

| research |

We live in a diverse world that tempt us with patterns that are often times challenging to interpret. This diversity fascinates me, and manifests itself in my research interests. I have always been interested in data models and the techniques to analyze them. Tables, text and graphs are like Lego pieces that can be put together using machine learning, complex networks and natural language processing. Data Science is all about this diversity, being currently my main research focus. In this context I'm currently involved with topics such as outlier detection, fake news analysis, and academic social networks.

Talk about Fake News (slides in Portuguese)

Talk about data science and multi-model, multi-disciplinary applications (slides in Portuguese)

Tutorial about outlier detection (slides in Portuguese)

I'm also involved in Database Systems research. Lately I have explored topics such as privacy-preserving databases and blockchain-based transparency. In my phd thesis, I proposed a framework for management of complex data, named CDMS (Complex Data Management System). It features a more expressive query language and a extended relational algebra that allows graph-based aggregation. This enables the representation, combination and assessment of several complex network measurements in the queries.

Thesis defense (slides)


| projects |

Data Science for a Cause: The goal of the project is to connect NGOs with students that are learning about data science. The NGOs propose data analysis tasks for the students, which are supervised by researchers in the related areas.

Data Science for a Cause website (in Portuguese)

SecureCloud: The SecureCloud project aims to remove technical impediments to dependable cloud computing, i.e., SecureCloud will ensure the confidentiality, integrity, availability and security of applications and their data.

SecureCloud website


| publication |

See up-to-date list on Curriculo Lattes

In-class social networks and academic performance: how good connections can improve grades - L. Gomes-Jr - Brazilian Symposium on Databases (SBBD), 2019

Fake News and Brazilian politics - temporal investigation based on semantic annotations and graph analysis - L. Gomes-Jr and G. Frizzo - Brazilian Symposium on Databases (SBBD), 2019

A Context-driven Querying System for Urban Graph Analysis - Chabin, Jacques and Gomes-Jr., Luiz and Halfeld-Ferrari, Mirian - IDEAS 2018

Privacy-preserving recommendations for Online Social Networks using Trusted Execution Environments - ROSSI, Guilmour; GOMES-JR, Luiz; ROSA, Marcelo; FONSECA, Keiko - SBSEG 2018

Cloud Challenge: Secure End-to-End Processing of Smart Metering Data - BRITO, Andrey et al. - 2018 IEEE/ACM International Conference on Utility and Cloud Computing Companion (UCC Companion), 2018

Securing Smart Metering applications in Untrusted Clouds with the SecureCloud Platform - Riella, R. et al. - 1st Workshop on Privacy by Design in Distributed Systems - W-P2DS, 2018

Beta-Algebra: Towards a Relational Algebra for Graph Analysis - L. Gomes-Jr, B. Amann and A. Santanche - GraphQ/EDBT 2015

The Web Within: Leveraging Web Standards and Graph Analysis to Enable Application-Level Integration of Institutional Data - L. Gomes-Jr and A. Santanche - Transactions on Large-Scale Data- and Knowledge-Centered Systems XIX 2015

Query-based inferences in the Complex Data Management System - L. Gomes-Jr, R. Jensen and A. Santanche - SLG/ICML 2013

Towards query model integration: topology-aware, IR-inspired metrics for declarative graph querying - L. Gomes-Jr, R. Jensen and A. Santanche - GraphQ/EDBT 2013

Information Extraction for BI - D. Barbosa, L. Gomes-Jr, and F. Tompa - Perspectives on Business Intelligence (book chapter) 2013

Ecologically-aware Queries for Biodiversity Research - L. Gomes-Jr and C. Medeiros - GeoInfo 2007


| teaching |


Discrete Mathematics

Introduction to Data Science

Data Science 2 (unstructured data)

Information Retrieval


| hobbies |

I like outdoor activities, especially those involving contact with nature. I'm a rock climber, very fond of the mountains. I love traveling and I'm always looking for opportunities to hit the road. I've covered many miles backpacking and climbing through nice places, especially in the amazing South America.

Travel Pictures

I've been practicing yoga for several years and used to lead yoga practices at the university. I used to cultivate an organic garden and have been a volunteer in the WOOFF program. Lately I have been studying and practicing photography.

Things Light Does (Flickr)

I read lots of things, but lately it has been mostly non-fiction. I really enjoy reading a book that attempts to answer interesting and non-trivial questions about the real world. I liked Malcolm Gladwell's books, most of James Gleick's and the Freakonomics series. I have been reading a lot about sustainability (Michael Pollan's, The One-Straw Revolution, The World Without Us, Rational Optimist, etc). I am very passionate about biology, especially neurology, and liked many related books (The Last Human, Why Zebras don't get Ulcers, The Accidental Mind, Mind Wide Open, etc). More recently, my readings have been mostly about the information revolution, its history and possible implications (The Information, The Singularity is Near, etc). And there are, of course, the many science-related classics (Sagan's, Dawkins', Gould's, Hawking's).


| links |

Some random links for sites and tools I find interesting.

The Collection of Computer Science Bibliographies

The Retrocomputing Museum

Princeton University: WebMedia - Lectures