# Aleksandar Tomasevic

> Associate Research Professor and computational social scientist based in Novi Sad, Serbia. Current roles: Associate Research Professor, Scientific Computing Laboratory at Institute of Physics Belgrade; Assistant Professor / Research Associate at University of Novi Sad. Primary topics: computational social science, online-community analysis, machine learning, natural language processing, network analysis, LLM-agent simulation, and multimodal emotion analysis.

## Identity

- Canonical name: Aleksandar Tomašević
- Alternate spelling: Aleksandar Tomasevic
- Website: https://atomasevic.xyz
- Location: Novi Sad, Serbia

## Current Roles

- Associate Research Professor, Scientific Computing Laboratory, Institute of Physics Belgrade (Belgrade / Serbia) | 2025-07-01 to present
- Assistant Professor / Research Associate, University of Novi Sad (Novi Sad / Serbia) | 2016-02-01 to present

## Focus Areas

- Online-community analysis
- Machine learning
- Natural language processing
- Text classification
- Sentiment analysis
- Toxicity analysis
- Emotion recognition
- LLM systems
- Agent simulation
- Python
- R
- PostgreSQL
- Docker
- Transformer models
- Scientific computing
- Reproducible workflows

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## Recent Updates

- 2026-07-07 — A dynEGA case-study paper was published in *Psychiatry Research Case Reports*. [DOI](https://doi.org/10.1016/j.psycr.2026.100342) · [OSF preprint](https://doi.org/10.31234/osf.io/urfek_v1)
- 2026-07-06 — “Between ‘we’ and ‘well-being’: Do basic psychological needs mediate the relationship between interdependent self-construal and adolescent subjective well-being?” was published in *Applied Psychology: Health and Well-Being*. [DOI](https://doi.org/10.1111/aphw.70172) · [OSF preprint](https://osf.io/preprints/osf/r4vfp_v1)
- 2026-07-02 to 2026-07-03 — Served on the examination committee for the Italian National PhD Programme in Artificial Intelligence, AI for Society track, at CNR Pisa.
- 2026-07-01 — Gave the invited ISTI-CNR seminar “From Simulated Online Communities to Hybrid Publics with YSocial: Operational Validation and Experimental Evidence.” [Official event](https://www.isti.cnr.it/announcements/seminars/17/From_Simulated_Online_Communities_to_Hybrid_Publics_with_YSocial%3A_Operational_Validation_and_Experimental_Evidence) · [Slides](https://docs.google.com/presentation/d/1UZQJa1CSCb9o3Cb5v5VEF0Pl7_5ARJOrAs4QVjtArZw/view?usp=sharing)
- 2026-06-27 — “From Agents to Humans: Network Structure and Homophily in LLM-Simulated and Mixed Online Communities” was presented by Sara Major at Sunbelt 2026. [Conference](https://www.insna.org/events/sunbelt-2026---daytona-beach)
- 2026-06-11 — “Towards Operational Validation of LLM-Agent Social Simulations: A Replicated Study of a Reddit-like Technology Forum” was published in *EPJ Data Science*. [DOI](https://doi.org/10.1140/epjds/s13688-026-00674-x) · [Code](https://github.com/atomashevic/voat-simulation)

## Selected Publications (2026)

- dynEGA case-study paper. *Psychiatry Research Case Reports*, 5(2), 100342. [DOI](https://doi.org/10.1016/j.psycr.2026.100342) · [OSF](https://doi.org/10.31234/osf.io/urfek_v1)
- “Between ‘we’ and ‘well-being’: Do basic psychological needs mediate the relationship between interdependent self-construal and adolescent subjective well-being?” *Applied Psychology: Health and Well-Being*, 18(4), e70172. [DOI](https://doi.org/10.1111/aphw.70172) · [OSF](https://osf.io/preprints/osf/r4vfp_v1)
- “Towards Operational Validation of LLM-Agent Social Simulations: A Replicated Study of a Reddit-like Technology Forum.” *EPJ Data Science*. [DOI](https://doi.org/10.1140/epjds/s13688-026-00674-x)
- “Investigating the analytical robustness of the social and behavioural sciences.” *Nature*, 652(8108), 135–142. [DOI](https://doi.org/10.1038/s41586-025-09844-9)
- “Identity Orientations: Personal, Relational, Public, and Collective Aspects of Identity.” *Identity*. [DOI](https://doi.org/10.1080/15283488.2026.2649028)
- “Making Sense of Student Feedback in Large Classes: A Practical Guide Using AI-Based Text Analysis.” *College Teaching*. [DOI](https://doi.org/10.1080/87567555.2026.2639369)
- Cross-national adolescent mental-health and subjective well-being study. *Journal of Affective Disorders*. [DOI](https://doi.org/10.1016/j.jad.2026.121693)
- “transforEmotion: An Open-Source R Package for Emotion Analysis Using Transformer-Based Generative AI Models.” *Computational Communication Research*. [DOI](https://doi.org/10.5117/CCR2026.2.2.TOMA)
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## Selected Projects

- **YSocial Multi-Agent Social Platform Simulation** (2025-09-01 to present): Built and evaluated components of an LLM-powered social media twin spanning microblogging and forum-style simulations for trust, toxicity, and conversation-quality research.
- **MADOC Dataset and Tools** (2025-01-01 to present): Built a research dataset and tooling stack for large-scale online-community analysis, with emphasis on reproducible ingestion, cleaning, and downstream modeling workflows. [Link](https://zenodo.org/records/14637314)
- **transforEmotion R package** (2023-10-01 to present): Built an R package with a Python backend for multimodal emotion recognition across text, image, and video, with more than 9k CRAN installs. [Link](https://github.com/atomashevic/transforEmotion)
- **COVID-19 Data Analysis and Visualization Platform** (2020-04-01 to 2020-06-30): Engineered R data pipelines to clean, analyze, and visualize epidemiological data from multiple sources. [Link](https://scienceversuscorona.shinyapps.io/covid-overview/)

## Site Pages

- [Home](https://atomasevic.xyz/) ([Markdown](https://atomasevic.xyz/index.html.md))
- [Publications](https://atomasevic.xyz/publications.html) ([Markdown](https://atomasevic.xyz/publications.html.md)): all 36 papers with authors, venue, DOI, citation counts and, for 33 of them, the abstract
- [Software](https://atomasevic.xyz/software.html) ([Markdown](https://atomasevic.xyz/software.html.md))
- [Talks](https://atomasevic.xyz/talks.html) ([Markdown](https://atomasevic.xyz/talks.html.md))
- [Updates](https://atomasevic.xyz/updates.html) ([Markdown](https://atomasevic.xyz/updates.html.md))
- [CV PDF](https://atomasevic.xyz/cv.pdf)

## Paper Pages

Plain-language summaries of major papers, with links to the paper, code and data, the main figure, abstract and BibTeX.

- [“Oh No, the Robots Are Here”: AI identity labels, social uptake and sanctioning in mixed human–AI communities](https://atomasevic.xyz/papers/ai-identity-labels.html) ([Markdown](https://atomasevic.xyz/papers/ai-identity-labels.html.md)), 2026
- [A Latent Oscillator Measurement Model to Simulate Emotional-Expression Score Dynamics in Video](https://atomasevic.xyz/papers/latent-oscillator.html) ([Markdown](https://atomasevic.xyz/papers/latent-oscillator.html.md)), 2026
- [Reddit deplatforming and cohort mixing in generalist Voat communities](https://atomasevic.xyz/papers/voat-deplatforming.html) ([Markdown](https://atomasevic.xyz/papers/voat-deplatforming.html.md)), 2026
- [Towards Operational Validation of LLM-Agent Social Simulations: A Replicated Study of a Reddit-like Technology Forum](https://atomasevic.xyz/papers/llm-simulation-validation.html) ([Markdown](https://atomasevic.xyz/papers/llm-simulation-validation.html.md)), 2026
- [transforEmotion: An Open-Source R Package for Emotion Analysis Using Transformer-Based Generative AI Models](https://atomasevic.xyz/papers/transforemotion.html) ([Markdown](https://atomasevic.xyz/papers/transforemotion.html.md)), 2026
- [Multi-Platform Aggregated Dataset of Online Communities (MADOC)](https://atomasevic.xyz/papers/madoc.html) ([Markdown](https://atomasevic.xyz/papers/madoc.html.md)), 2025
- [The face of populism: examining differences in facial emotional expressions of political leaders using machine learning](https://atomasevic.xyz/papers/face-of-populism.html) ([Markdown](https://atomasevic.xyz/papers/face-of-populism.html.md)), 2025
- [Sustainability of Stack Exchange Q&A communities: The role of trust](https://atomasevic.xyz/papers/stack-exchange-trust.html) ([Markdown](https://atomasevic.xyz/papers/stack-exchange-trust.html.md)), 2023

## Machine-Readable Data

- [Source YAML](https://atomasevic.xyz/cv.yml)
- [Full LLM profile](https://atomasevic.xyz/llms-full.txt): full CV plus the complete publication list with abstracts, in one file
- [Publications JSON](https://atomasevic.xyz/papers.json): one record per paper with DOI, abstract (where available), open-access link, citation count, APA citation and BibTeX
- [Structured CV JSON](https://atomasevic.xyz/cv.json)
- [Person JSON-LD](https://atomasevic.xyz/person.jsonld)

## Profiles

- [ORCID (0000-0003-4863-6051)](https://orcid.org/0000-0003-4863-6051)
- [Google Scholar (nPTApsYAAAAJ)](https://scholar.google.com/citations?user=nPTApsYAAAAJ)
- [GitHub (atomashevic)](https://github.com/atomashevic)
- [LinkedIn (atomasevic)](https://www.linkedin.com/in/atomasevic/)
- [X (atomasevic)](https://x.com/atomasevic)