Hang-Hyun Jo
@socph.bsky.social
Associate Professor at The Catholic University of Korea; statistical physics and complex systems; co-author of "Bursty Human Dynamics" (Springer, 2018); http://h2jo.xyz; visiting the University of Michigan till February 2027
Don’t reach for ChatGPT Images or Nano Banana as your first option when creating scientific images There are multiple free and open-source images, icons, and tools for creating scientific illustrations. #plantscience @stephenturner.us blog.stephenturner.us/p/free-open-...
Free and open-source images, icons, and tools for creating scientific illustrations
Phylopic, NIH Bioart, Bioicons, Scidraw, Open Science Art, Health Icons, Servier Medical Art, Biodiversity Heritage Library, the Noun Project, Segment Anything, Excalidraw, draw.io, Biographics
blog.stephenturner.us
After a couple of weeks of heatwave in Ann Arbor, now it feels like a Finnish summer. Several years ago, when I visited Aalto University in summer, I had to buy a "summer jacket".
Few statisticians know that Frank Yates, pioneer of experimental design, is responsible for the annoying practice of indicating 3 tiers of statistical significance by stars (*p ≤ 0.05, **p ≤0.01, ***p ≤ 0.001). He soon regretted it and “vehemently opposed its unthinking use”. And here we are.
All of sudden, I wondered why the number of neighbors of a node in networks is called a "degree". In the original paper by Erdos and Renyi (1960), I found a sentence: "The number of edges starting from the point P of a graph G will be called the degree of P in G." But without any explanation.
I've never imagined that I'd worry about the air quality in Ann Arbor, until yesterday. Today it's getting worse and worse.
The New York Times@nytimes.com · 3w agoWildfire smoke can be seen via satellites from the Upper Midwest and Canada, across the Great Lakes and down to New York City. A heat dome is pushing temperatures close to 100 degrees across much of eastern Canada and has prompted alerts about poor air quality. nyti.ms/3RHmZnk
How can an extremely simple equation open the door to virtually infinite complexity? Fifty years ago, Bob May’s classic paper in @nature.com on chaos showed how deterministic rules can generate unpredictability, with deep implications for ecology, physics & beyond. mym.iimas.unam.mx/ramon/docs/M...
sites.google.com/view/rhino20... "Roles of Heterogeneity In NOn-equilibrium collective dynamics (RHINO2026)", August 28-30, 2026, Yokohama Campus, Meiji Gakuin University, Japan
RHINO2026
News July 6, 2026 Home page open Registration and abstract submission start
sites.google.com
Oh, I've used "quite some" quite often in my everyday English conversation and didn't know it was not a standard English.
Philip Ball@philipcball.bsky.social · last mo.I'd go further: if we native English speakers expect English to be the lingua franca (ha!) of most of the world, everyone who uses it gets to influence how it evolves. Phrases that aren't standard English, like "quite some" and "allows to", are then no longer really "wrong" at all.
I'd go further: if we native English speakers expect English to be the lingua franca (ha!) of most of the world, everyone who uses it gets to influence how it evolves. Phrases that aren't standard English, like "quite some" and "allows to", are then no longer really "wrong" at all.
Rae Radford@raeradford.bsky.social · last mo.Kudos #BookSky
Why does it take so long to get the volume and pages for the accepted paper in Scientific Reports? I need such information for the process in my university.
Hang-Hyun Jo@socph.bsky.social · 3mo agoAccepted for publication in Scientific Reports! I thank @tibebe12.bsky.social for his hard work.
Chapter 15: @kristinalerman.bsky.social on the Strong Friendship Paradox. Showing how the structure of social networks systematically biases our perceptions of reality. When our friends are not representative of the population, rare behaviours and opinions can appear surprisingly common.
Taha Yasseri@tahayasseri.bsky.social · 2mo agoChapter 14: @bolozna.bsky.social on multilayer social networks. A great introduction to one of the most important recent developments in network science: moving beyond single-layer graphs to represent the multiple social contexts and relationships that shape human behavior. Social life is layered!
www.youtube.com/watch?v=MwFe... Yesterday I happened to watch Prof. C.-K. Peng's lecture video. He developed the DFA and MSE, etc. with his colleagues.
A Theory of Medical Science, Complexity as the Measurement for Health
YouTube video by Labfront
youtube.com
Alex Vespignani officially opening #NetSci2026, reviewing the history of this community's growth This year, 800 people came together!! @netscisociety.bsky.social @netsciconf.bsky.social
Our new preprint is out on arXiv: Jiyoung Kang, Hang-Hyun Jo, Naoki Masuda, Quantifying concurrency in event-based temporal network and hypergraph data arxiv.org/abs/2605.24633
Quantifying concurrency in event-based temporal network and hypergraph data
Many social, biological, and technological systems are recorded as sequences of time-stamped interactions. In such systems, concurrency, i.e., the tendency for an individual to participate in multiple...
arxiv.org
In our now-accepted paper, we analyzed more than 200 people's heartbeat time series, publicly available at physionet.org. We focused on the inter-event times (IETs, equivalent to RR intervals) for the analysis, e.g., we measured the burstiness and memory coefficient between two IETs:
PhysioNet
physionet.org
Hang-Hyun Jo@socph.bsky.social · 8mo agoNew 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
Balancing research and family life doesn't have to be a dilemma! 👶 If you are planning to attend #CCS2026 and need on-site childcare services, please reach out to stulkjesso@binghamton.edu with the email subject line: "Childcare for CCS".
Accepted for publication in Scientific Reports! I thank @tibebe12.bsky.social for his hard work.
Hang-Hyun Jo@socph.bsky.social · 8mo agoNew 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
Our new paper is out on the arXiv: Yeonji Seo, Mi Jin Lee, Seung-Woo Son, Hang-Hyun Jo, Yohsuke Murase, Editorial Trajectories in Wikipedia Reflect Underlying Hyperlink Structure, arxiv.org/abs/2605.16850
Editorial Trajectories in Wikipedia Reflect Underlying Hyperlink Structure
Wikipedia hyperlinks have primarily been studied as navigational tools for readers, but their role in how information providers move between articles during editing remains less explored. Here, we com...
arxiv.org
Our new preprint is out on arXiv: Hang-Hyun Jo, Naoki Masuda, Modeling non-Poissonian temporal hypergraphs by Markovian node dynamics, arXiv:2604.07694 arxiv.org/abs/2604.07694
Modeling non-Poissonian temporal hypergraphs by Markovian node dynamics
Temporal hypergraphs capture time-resolved group interactions among nodes. Empirical data support that time-stamped group interactions show bursty event sequences and non-trivial temporal correlations...
arxiv.org
I just found that in their IJMPC paper in 2017, Fu & Wu copied the first paragraph of our paper (Eom & Jo, Sci. Rep. 2014) without any modifications. Wow, so brave.
Super excited that we will be hosting the 2026 Conference on #ComplexSystems in Binghamton. Our campus has a foundational history in the field, and we are delighted to welcome back the community this October. Abstract submission deadline: May 1, 2026. ccs26.cssociety.org
CCS 2026: The 2026 Conference on Complex Systems @ Binghamton, NY, USA
ccs26.cssociety.org
