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; he/him
I just copied the poster of the workshop, which looks interesting.
August 30, 2025 at 6:24 AM
I just copied the poster of the workshop, which looks interesting.
Attending the summer school on nonlinear dynamics and chaos at KIAS
August 12, 2025 at 1:46 AM
Attending the summer school on nonlinear dynamics and chaos at KIAS
www.complexity.kr?p=1322 I'm pleased to join the 2025 KACS-KENTECH Summer School on Complex Systems as a lecturer with other 7 lecturers. This year we study the Korean translation of the famous book "Nonlinear Dynamics and Chaos" by Steven Strogatz. All lectures are given in Korean too.
June 10, 2025 at 1:07 AM
www.complexity.kr?p=1322 I'm pleased to join the 2025 KACS-KENTECH Summer School on Complex Systems as a lecturer with other 7 lecturers. This year we study the Korean translation of the famous book "Nonlinear Dynamics and Chaos" by Steven Strogatz. All lectures are given in Korean too.
Complex social system
December 15, 2024 at 6:09 AM
Complex social system
I took this video last summer at Aalto University, Finland.
November 29, 2024 at 8:31 AM
I took this video last summer at Aalto University, Finland.
If you see this, please repost with a favourite photo of the sky that you’ve taken recently
November 16, 2024 at 11:16 AM
If you see this, please repost with a favourite photo of the sky that you’ve taken recently
Patterns of the civilization
November 10, 2024 at 10:57 AM
Patterns of the civilization
No photos about the workshop but a few about Okinawa.
November 10, 2024 at 6:58 AM
No photos about the workshop but a few about Okinawa.
I just made a slide showing the flowchart for the derivation of the autocorrelation function from the inter-event time and burst size distributions.
October 28, 2024 at 1:45 PM
I just made a slide showing the flowchart for the derivation of the autocorrelation function from the inter-event time and burst size distributions.
Four years ago I proposed the burst-tree decomposition method with Takayuki and Mikko (www.nature.com/articles/s41...). It was shown that the event sequence (lower part of the figure) can be mapped to the binary tree structure (upper), each node is a bursty train detected at the timescale Δt.
October 28, 2024 at 2:58 AM
Four years ago I proposed the burst-tree decomposition method with Takayuki and Mikko (www.nature.com/articles/s41...). It was shown that the event sequence (lower part of the figure) can be mapped to the binary tree structure (upper), each node is a bursty train detected at the timescale Δt.
Attending now the symposium on nonlinear and complex systems
June 28, 2024 at 4:23 AM
Attending now the symposium on nonlinear and complex systems
Today’s bluesky with clouds
May 28, 2024 at 5:05 AM
Today’s bluesky with clouds
Thus, in their model β is infinite. Our solution is for any β, finally completing the picture in the figure.
April 29, 2024 at 1:33 AM
Thus, in their model β is infinite. Our solution is for any β, finally completing the picture in the figure.
For this, we devised a simple model generating time series with any functional forms of IET and burst-size distributions (see Figure). Then we derived the ACF for this model. Finally, assuming that IET and burst-size distributions are power laws, we obtained the ACF, hence the decay exponent.
April 29, 2024 at 1:25 AM
For this, we devised a simple model generating time series with any functional forms of IET and burst-size distributions (see Figure). Then we derived the ACF for this model. Finally, assuming that IET and burst-size distributions are power laws, we obtained the ACF, hence the decay exponent.
It's because the autocorrelation function (ACF) measures "all" temporal correlations in time series, while inter-event times (IETs) and burst sizes reveal only some "part" of those correlations. Now we have the answer.
April 29, 2024 at 1:22 AM
It's because the autocorrelation function (ACF) measures "all" temporal correlations in time series, while inter-event times (IETs) and burst sizes reveal only some "part" of those correlations. Now we have the answer.
Figure from link.springer.com/chapter/10.1...
Let's begin with the following figure, where the decay exponent γ of the autocorrelation function A must be a function of the power-law exponent α of inter-event time distribution P and the power-law exponent β of burst-size distribution, i.e., γ(α, β).
Let's begin with the following figure, where the decay exponent γ of the autocorrelation function A must be a function of the power-law exponent α of inter-event time distribution P and the power-law exponent β of burst-size distribution, i.e., γ(α, β).
April 29, 2024 at 1:19 AM
Figure from link.springer.com/chapter/10.1...
Let's begin with the following figure, where the decay exponent γ of the autocorrelation function A must be a function of the power-law exponent α of inter-event time distribution P and the power-law exponent β of burst-size distribution, i.e., γ(α, β).
Let's begin with the following figure, where the decay exponent γ of the autocorrelation function A must be a function of the power-law exponent α of inter-event time distribution P and the power-law exponent β of burst-size distribution, i.e., γ(α, β).
Finally published online, see link.springer.com/article/10.1... However, I have to complain about the proofreading process; I've never seen two-column captions for single column figures. We already asked to correct these but the paper was published without fixing this issue.
November 14, 2023 at 11:49 AM
Finally published online, see link.springer.com/article/10.1... However, I have to complain about the proofreading process; I've never seen two-column captions for single column figures. We already asked to correct these but the paper was published without fixing this issue.
Now attending the Korean Physical Society Fall Meeting, StatPhys session.
October 27, 2023 at 1:39 AM
Now attending the Korean Physical Society Fall Meeting, StatPhys session.
Blue sky with white clouds
August 25, 2023 at 12:19 AM
Blue sky with white clouds
The attached figure essentially summarizes my academic network for the last ~20 years. Thank you for all. Source: Pure by Elsevier
July 31, 2023 at 2:45 PM
The attached figure essentially summarizes my academic network for the last ~20 years. Thank you for all. Source: Pure by Elsevier
The upper figures are from Bokanyi's paper (2023) and the lower part is from my presentation in 2016, presenting my PRE paper with my colleagues (https://journals.aps.org/pre/abstract/10.1103/PhysRevE.94.052319). Our conjecture is now proven!
July 18, 2023 at 8:09 AM
The upper figures are from Bokanyi's paper (2023) and the lower part is from my presentation in 2016, presenting my PRE paper with my colleagues (https://journals.aps.org/pre/abstract/10.1103/PhysRevE.94.052319). Our conjecture is now proven!