Hang-Hyun Jo

Hubo, 2004

www.npsm-kps.org/journal/view... published version (special thanks to @socph.bsky.social et al.)

Handbook of Computational Social Science cover and authors

ICYMI -- Delighted that the Handbook of Computational Social Science is finally out. Amazing cast of coauthors, with special thanks to @tahayasseri.bsky.social for leading the effort. Happy Holidays!

www.elgaronline.com/edcollbook/b...

Happy holidays and happy new year!

The Korean translation of the fascinating textbook 'The Nature of Complex Networks' [1] written by Sergey N. Dorogovtsev and José F. F. Mendes will be published soon (expected in early 2026), feat. Prof. Mendes's special message to Korean readers!

[1] global.oup.com/academic/pro...

Oh, Taha has been in Bluesky @tahayasseri.bsky.social, who edited the handbook.

www.e-elgar.com/shop/gbp/han... I learned that the Handbook of Computational Social Science is about to be published, to which my old colleague Marton @martonkarsai.bsky.social and I contributed a chapter on bursty human phenomena.

Balancing the Last Birth: A Game-Theoretical Resolution to the Human Sex Ratio Puzzle We study the evolution of offspring sex ratios using a game-theoretical model in which the decision to have another child depends on the sex of the previous child. Motivated by higher male infant mort...

Hi, you might be interested in the following paper: arxiv.org/abs/2507.10332

I've got the message that the abstract submission opened.

Thank you for your information, but the answer is no. We just cited several papers on detrended fluctuation analysis (DFA), multiscale entropy (MSE), and visibility graph (VG) algorithm that have been applied to the heartbeat time series analysis.

Analysis framework for higher-order temporal correlations with applications to human heartbeats We propose a time series analysis framework focused on higher-order temporal correlations in the event sequence beyond the interevent time distribution by employing the burst-tree decomposition method...

New arXiv preprint out with my postdoc Tibebe Birhanu @tibebe12.bsky.social on the time series analysis: Analysis framework for higher-order temporal correlations with applications to human heartbeats, arxiv.org/abs/2512.01235

paper submitted

We’re recruiting PhD students at @uvadatascience.bsky.social, and I’m looking for students to join our group (Y Lab) next year!

My group works at the intersection of network science, machine learning, and interpretable AI.

yyahn.com/ylab/

Apply here! datascience.virginia.edu/degrees/phd

Accepted for publication in Physica D!

www.complexity.kr?p=1336 I learned that there'll be the Korea Academy of Complexity Studies Conference on December 6. The topic is the AI and complex systems.

Hierarchical organization of bursty trains in event sequences Temporal sequences of discrete events that describe natural and social processes are often driven by non-Poisson dynamics. In addition to a heavy-tailed interev

published pubs.aip.org/aip/cha/arti...

Two variants of the friendship paradox: The condition for inequality between them The friendship paradox -- the observation that, on average, one's friends have more friends than oneself -- admits two common formulations depending on whether averaging is performed over edges or ove...

Two variants of the friendship paradox: The condition for inequality between them arxiv.org/abs/2511.06176 a small experimental scientific communication project, encouraged by @socph.bsky.social

중간고사 문제 출제를 계기로 다시 보기 시작했고, 궁금증을 해결했지만 논문거리는 아닌 것 같아서 이 정도로 남김 ... 을 ChatGPT가 이 정도로 확장해 줌 ... 😶

친구 역설 또는 우정 역설 (friendship paradox) 에 대해 예전부터 갖고 있었던 의문이 있었는데, ChatGPT의 도움으로 해결한 듯 하다.

1. 결과물: drive.google.com/file/d/1GRSu...
2. 배경 설명: drive.google.com/file/d/1Uqu1...

이런 간단한 일을 *빠르기* 처리하기엔 좋은 듯 함.

Accepted for publication in Chaos! @takayukihir.bsky.social

Attending the KPS fall meeting in Gwangju, Korea

Our paper “Regional disparities in the distribution of public and private healthcare facilities in South Korea” has been published in the international journal PLOS ONE 🎉 (lnkd.in/gMPnhkdC)
Special thanks to our undergraduate co-author (3rd year student) for contributing to this meaningful study.

I just learned that Asia-Pacific Summer School and Conference on Networks and Complex Systems will be held next year at NTU, Singapore. Please check out the official website: apcncs2026.github.io

I just copied the poster of the workshop, which looks interesting.

Now attending the RHINO 2025 in Pukyong National University in Busan with participants mostly from Korea and Japan.

Hierarchical organization of bursty trains in event sequences Temporal sequences of discrete events that describe natural and social processes are often driven by non-Poisson dynamics. In addition to a heavy-tailed interevent time distribution, which primarily c...

Our new preprint with @takayukihir.bsky.social is out in arXiv: Takayuki Hiraoka‬ and Hang-Hyun Jo, Hierarchical organization of bursty trains in event sequences, arxiv.org/abs/2508.18281

I submitted my manuscript to the arXiv one week ago, which is still "on hold", and didn't get any message from the arXiv since then. Should I wait longer or take any action?

journals.aps.org/pre/abstract...

Is this the first journal containing the term "social physics"? In any case, I'm excited to see that such journal has been finally started.

On the friendship paradox and inversity: A network property with applications to privacy-sensitive network interventions | PNAS We provide the mathematical and empirical foundations of the friendship paradox in networks, often stated as “Your friends have more friends than y...

Recently, Scott Feld and his colleagues reported a mathematical result regarding the difference between individual-level and network-level FPs, but not exactly the same as my previous definitions. You can refer to www.pnas.org/doi/10.1073/...