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Reposted by Hang-Hyun Jo

netscieunlee.bsky.social @netscieunlee.bsky.social · 14d

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.

This link will take you to a page that’s not on LinkedIn

lnkd.in

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Hang-Hyun Jo @socph.bsky.social · 24d

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

APCNCS 2026 - Asia-Pacific Summer School and Conference on Networks and Complex Systems

Asia-Pacific Summer School and Conference on Networks and Complex Systems - June 2-5, 2026 at Nanyang Technological University, Singapore

apcncs2026.github.io

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Hang-Hyun Jo @socph.bsky.social · Aug 30

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

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Hang-Hyun Jo @socph.bsky.social · Aug 30

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

Hang-Hyun Jo @socph.bsky.social · May 3

We're organizing the "APCTP Workshop on the Roles of Heterogeneity in Nonequilibrium (RHINO 2025)"; the workshop will be held from 29 August to 1 September 2025 in Pukyong National University (PKNU), Busan, Korea.

www.apctp.org/theme/d/html...

APCTP

www.apctp.org

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Hang-Hyun Jo @socph.bsky.social · Aug 27

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

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...

arxiv.org

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Hang-Hyun Jo @socph.bsky.social · Aug 21

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?

Reposted by Hang-Hyun Jo

Sang Hoon Lee @lshlj.bsky.social · Aug 16

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

Editorial: Statistical and Nonlinear Physics Crosses a Threshold

The leadership of APS Division of Statistical and Nonlinear Physics celebrates its division status and reflects on the state of the art.

journals.aps.org

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Hang-Hyun Jo @socph.bsky.social · Aug 15

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.

Scilight Press @scilightpress.bsky.social · Aug 11

🌐 Journal of Social Physics now accepting submissions exploring the sociophysics, econophysics, and overlaps with computational social science. Share your research!
#CallForPapers #SocialPhysics #ComplexSystems
sciltp.com/journals/jsp

Hang-Hyun Jo @socph.bsky.social · Aug 15

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/...

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...

www.pnas.org

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Scilight Press @scilightpress.bsky.social · Aug 11

🌐 Journal of Social Physics now accepting submissions exploring the sociophysics, econophysics, and overlaps with computational social science. Share your research!
#CallForPapers #SocialPhysics #ComplexSystems
sciltp.com/journals/jsp

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Hang-Hyun Jo @socph.bsky.social · Aug 15

We have distinguished them: the former is the individual-level friendship paradox (FP), while the latter is the network-level FP. For the former, we used to measure the fraction of individuals who suffer the individual FP. E.g., see Table 1 in www.nature.com/articles/sre...

Generalized friendship paradox in complex networks: The case of scientific collaboration - Scientific Reports

Scientific Reports - Generalized friendship paradox in complex networks: The case of scientific collaboration

www.nature.com

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Hang-Hyun Jo @socph.bsky.social · Aug 14

Yet another kind of friendship paradox, an imposter paradox?

Casey Explosion @caseyexplosion.bsky.social · Aug 13

Other people have better imposter syndrome than me I bet

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Hang-Hyun Jo @socph.bsky.social · Aug 13

I don't have much knowledge about your question, in particular, regarding the graph embedding.

Hang-Hyun Jo @socph.bsky.social · Aug 13

Our new preprint is out in arXiv: Copula-based analytical results of horizontal visibility graphs for correlated time series arxiv.org/abs/2508.08934 This is from the collaboration with my undergraduate student Jeong-Min Lee.

Copula-based analytical results of horizontal visibility graphs for correlated time series

The visibility graph (VG) algorithm and its variants have been extensively studied in the time series analysis as they transform the time series into the network of nodes and links, enabling to charac...

arxiv.org

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Hang-Hyun Jo @socph.bsky.social · Aug 12

Attending the summer school on nonlinear dynamics and chaos at KIAS

Hang-Hyun Jo @socph.bsky.social · Aug 10

I posted a short article to my blog: brunch.co.kr/@socph/21 . The title is "fixed points and fate". To be precise, the fate of x(t) following the differential equation dx/dt=f(x,r) is determined by the parameter r.

고정점과 운명

비선형 동역학과 카오스 강의를 준비하며 | 다음 주에 열리는 복잡계 여름학교에서 스티븐 스트로가츠의 책 <비선형 동역학과 카오스> 3장을 맡아 강의하기로 했다. 3장의 제목은 갈래치기(bifurcation)다. 간단히 말하면 dx/dt = f(x,r) 형태로 주어지는 미분방정식에서 매개변수 r에 따라 x(t)의 운명이 어떻게 달라지는지를 보는 것이다. 내...

brunch.co.kr

Hang-Hyun Jo @socph.bsky.social · Jul 30

Wow cool!

Andreas Bjerre-Nielsen @andbjn.bsky.social · Jul 29

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What does the social fabric of an entire country look like?
We built a nation-scale social network of Denmark — 7.2 million people, 1.4 billion ties, 14 years of data.
Here’s what we found 👇
📄 doi.org/10.1038/s415...
#NetworkScience #Sociology

Unveiling the social fabric through a temporal, nation-scale social network and its characteristics - Scientific Reports

Scientific Reports - Unveiling the social fabric through a temporal, nation-scale social network and its characteristics

doi.org

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Hang-Hyun Jo @socph.bsky.social · Jun 30

Our new preprint is out!

Hyun-Woo Lee, Gerardo Iñiguez @iniguezg.bsky.social Hang-Hyun Jo, Hye Jin Park @hyejinpark.bsky.social "Ranking dynamics in movies and music" arxiv.org/abs/2506.21944

Ranking dynamics in movies and music

Ranking systems are widely used to simplify and interpret complex data across diverse domains, from economic indicators and sports scores to online content popularity. While previous studies including...

arxiv.org

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Takayuki Hiraoka @takayukihir.bsky.social · Jun 29

We also showed that the use of toponyms decays as a power law outside the area they represent.

If you are interested in knowing more, read on here:
doi.org/10.1371/jour...

Geospatial analysis of toponyms in geotagged social media posts

Place names, or toponyms, play an integral role in human representation and communication of geographic space. In particular, how people relate each toponym with particular locations in geographic spa...

doi.org

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Reposted by Hang-Hyun Jo

Takayuki Hiraoka @takayukihir.bsky.social · Jun 29

We found that toponyms show spatial specificity in their occurrence, unlike many common nouns. Interestingly, toponyms and common nouns describing places (e.g., “park”) behave differently from other common nouns (e.g., “music”) and toponyms referring to places outside the observation area.

A bar chart showing the dissimilarity of empirical data from the location-independent model for different words.

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Reposted by Hang-Hyun Jo

Takayuki Hiraoka @takayukihir.bsky.social · Jun 29

However, quantitative studies of toponyms have been scarce.

In our new article in PLOS One, Takashi Kirimura, Naoya Fujiwara and I tried to address this gap by using a dataset of 400 million geotagged Twitter posts to study the association between toponyms and geography.

Geographic distribution of the occurrence of the word "Fukuoka", plotted on a map of Japan.

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Reposted by Hang-Hyun Jo

Takayuki Hiraoka @takayukihir.bsky.social · Jun 29

Spatial cognition is vital for all animals. Humans, in particular, use cartographic knowledge and language to understand the environment beyond what we directly experience. Place names (toponyms) play a key role in this cognitive process as they reflect how we mentally structure geographical space.

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Hang-Hyun Jo @socph.bsky.social · Jun 15

Here are the codes for the implementation: github.com/h2jo/memory_b/

GitHub - h2jo/memory_b: Codes for the time series simulation with correlated burst sizes

Codes for the time series simulation with correlated burst sizes - h2jo/memory_b

github.com

Hang-Hyun Jo @socph.bsky.social · Jun 15

Our paper has been finally published in Physica D! See www.sciencedirect.com/science/arti...

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Reposted by Hang-Hyun Jo

New papers in Network Science @networkspapers.bsky.social · Jun 11

PLOS ONE: Homophilic organization of egocentric communities in ICT services
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0325187

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