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# ✨ TQRG - The Quasar Research Group

Welcome to **TQRG - The Quasar Research Group**, led by **Rui Abreu**. We are a passionate, interdisciplinary team tackling challenges in **software testing**, **debugging**, **security**, **energy efficiency**, and **machine learning**.

Our mission is to create cutting-edge tools and methodologies that enhance software quality, performance, and sustainability. 🚀

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## 👥 Members

- **Rui Abreu** — *Group Leader*  
- Alexandre Perez  
- Thomas Durieux  
- Luis Cruz  
- Sofia Reis  
- Bruno Sotto-Mayor  
- João Ferreira  
- Ricardo Martins  
- Francisco Ribeiro  
- Nuno Sabino  
- David Coimbra  
- Eduard Pinconschi  
- Cláudia Mamede
- Luís Gomes
- Rui Melo

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## 🧪 Projects

| Project | Description |
|--------|-------------|
| **[GZoltar](https://github.com/GZoltar/gzoltar)** | Automatic Testing & Debugging using Spectrum-based Fault Localization (SFL) |
| **GZoltar-plugin** | VS Code plugin with all GZoltar commands integrated |
| **Physalia** | Energy measurement framework for mobile apps |
| **Leafactor** | Automatic refactoring tool for improving energy efficiency in Android apps |
| **Energy Patterns** | Open database of energy-related design patterns for mobile apps (iOS & Android) |
| **Android Test Inspector** | Android App Hall of Fame |
| **Pangolin** | Software visualization toolset for feature localization |
| **SecBench** | Database of real-world security vulnerabilities |
| **SECOM** | Convention for Security Commit Messages |
| **VDET** | Transformer-based VS Code extension for detecting Java vulnerabilities |
| **Tandem-FL** | Test minimizer based on Mozilla’s Lithium tool |

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## 📚 Selected Publications

### 📘 2023
- Gabriela K Michelon et al. *Spectrum-based feature localization for families of systems*. **JSS**.
- Francisco Ribeiro et al. *GPT-3-Powered Type Error Debugging*. **SLE'23**.

### 📘 2022
- Cláudia Mamede et al. *Transformer-based IDE plugin for vulnerability detection*. **ASE'22**.
- Sofia Reis et al. *Improving a Security Linter with Feedback*. **ASE'22**.
- 🏆 **MSR 2022 Foss Impact Paper Award**: *SECOM: Security Commit Message Convention*. **MSR'22**.
- Eduard Pinconschi et al. *Maestro: Program Repair Benchmarking Platform*. **ISSTA'22**.
- Francisco Ribeiro et al. *Framing Program Repair as Code Completion*. **APR'22**.

### 📘 2021
- David Coimbra et al. *Detecting C Security Vulnerabilities with Source Code Representations*. **DX'21**.
- Sofia Reis et al. *Fixing vulnerabilities potentially hinders maintainability*. **EMSE**.
- Rui Abreu et al. *Reducing Time-To-Fix for Fuzzer Bugs*. **ASE'21**.

### 📘 2020–2018
- Bruno Sotto-Mayor et al. *Smell-Based Defect Prediction with Designite*. **DX'20**.
- Thomas Durieux et al. *Empirical Study of Flaky Builds on Travis CI*. **MSR'20**.
- Luis Cruz & Rui Abreu. *Energy Pattern Catalog*. **EMSE**.
- Alexandre Perez et al. *Qualitative Reasoning for Fault Localization*. **IJCAI / ICSE**.

### 📘 2017 and earlier
- Sofia Reis & Rui Abreu. *SECBENCH: A Database of Security Vulnerabilities*. **ESORICS'17**.
- Luis Cruz et al. *Leafactor: Automatic Refactoring for Energy*. **MOBILESoft'17**.
- Alexandre Perez et al. *Test-Suite Diagnosability Metric*. **ICSE'17**.

> For the full list of publications, visit our Google Scholar profiles or institutional page.

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## 🤝 Join Us / Get in Touch

We welcome collaborations, student researchers, and industry partners. Whether you're curious about energy-efficient apps, AI-powered debugging, or software security — **we’d love to hear from you!**

📫 Email: `rui [at] computer.org`  
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_“Shining light on the dark matter of software systems.”_ ✨