MS Data Science @ Sabancı University

Sima Adleyba

Computational Social Science, Network Science & Algorithmic Fairness

I'm a second year Master's student in Data Science at Sabancı University, advised by Dr. Onur Varol. My research interests lie at the intersection of computational social science, network analysis, and algorithmic fairness.

My first paper studies the topical and social structure of Bluesky starter packs. I'm now investigating fairness and systemic bias in curation, network structure, and user exposure.

Portrait of Sima Adleyba
01

Selected Research

2025

Traffic Accident Severity Prediction

CS512 course project at Sabancı University, Oct 2025 to Jan 2026

Predicted injury severity in U.S. traffic crashes with class-weighted models and examined results using SHAP, LIME, and DiCE. With Başak Çarhacıoğlu and Ahmet İhsan Gül.

Machine learning, explainability

Confusion matrices comparing crash severity models
2024–25

Kariyer.net Knowledge Base

Industry project with Kariyer.net, Oct 2024 to Jun 2025

Built a skill extraction and normalization pipeline for Turkey's largest job platform using LangChain, GPT-4o-mini, and HDBSCAN. The resulting knowledge graph contains over 114,000 nodes and roughly 61 million edges.

NLP, knowledge graphs, LLMs

Poster ↗
02

Research Interests

Computational
Social Science

Online behavior, digital communities, social platforms, misinformation and polarization.

Network Science

Network structure, homophily, community formation, and diffusion.

Recommender Systems

Personalization and user modeling.

AI, HCI & Algorithmic Fairness

Bias in LLMs and how people interact with AI systems.

03

Experience

Oct 2025 – Present (3 terms)

Teaching Assistant, CS412 Machine Learning

Sabancı University

Led recitations on implementing core ML models, wrote and graded homework and quizzes, held weekly office hours.

Jan to Aug 2024

Data Science Intern

iLab

Built a RAG-based usability testing tool with LangChain, OpenAI API, MongoDB, and Docker.

04

Education

Sep 2025 to Jun 2027 expected

MS in Data Science

Sabancı University

Research with Dr. Onur Varol at the VRL Lab.

Sep 2020 to Jun 2025

BS in Computer Science

Sabancı University

05

Teaching & Resources

INTERACTIVE STUDY GUIDENetwork ScienceVisual explanations and interactive tools for centrality, random graphs, diffusion, and more.
06

Writing

Notes on research, technology, learning, and whatever else I get curious about long enough to finish.

Read the blog
People walking along a street in Kızılay, AnkaraA commuter in AnkaraMatisse exhibition at AKM, IstanbulWinter scene at Sabancı UniversityInside Istanbul ModernA passenger on an Istanbul ferry
08

Beyond Research

Music

I'll listen to almost anything, but lately it's mostly K-pop, rap, Japanese folk, progressive rock, and K-indie. I also play guitar. Though I must say, I like my HSS Strat and how I look with it.

Movies

I love whodunnits and murder mysteries and could genuinely talk about them for hours. Also into psychological thrillers and Korean cinema. Park Chan-wook especially.

Other Media

Some YouTube channels I watch regularly:

Other Interests

Linguistics, etymology, mathematics, sociology, urban studies. I game sometimes too.