Data Science and Complex Systems Group @ KIAS

Openings for research fellow positions will be announced in spring  2025.
Five  positions in School of Computational Sciences (announcement) are open for research fellows (2+2 years) with deadline October 31, 2024.

We are a group based in School of Computational Sciences at Korea Institute for Advanced Study (KIAS) investigating the large-scale data-sets of macroscopic complex systems in various disciplines to establish their underlying mathematical and physical principles. 


Macroscopic complex systems consist of a large number of interacting elements for which their full Hamiltonian or dynamical equations at the microscopic level are either hard to write down or not so useful for deciphering their emergent behaviors, contrasted to the systems of high degree of symmetry or homogeneity. The examples are biological cells, ecological communities, social networks, and economic systems, the large-scale data-sets of which are fortunately available in this era of big data. 


To extract quantitative and verifiable principles of those systems from the empirical data analysis and iteratively guide the latter, it is essential to develop mathematical models, for which the fundamental theoretical results and methods of statistical physics, network science, and data science are applied, such as the mean-field theory, stochastic processes, critical phenomena, non-equilibrium statistical mechanics, graph theory, neural networks, and so on.


Currently, the research topics of the group are wide ranging, including the intricate wiring of chemical reactions in the cellular metabolism, the interspecific interactions in ecological communities, human mobility, the spatiotemporal patterns of disease spreading, the value distributions in international trade, and so on.  


Seminars, Workshops, and Conferences

Upcoming


Past

2024

11/4 - 11/8/2024 KIAS-KU International workshop: Theoretical Challenges in Network Science (Web )

9/4/2024 Dr. Eddie Lee (Complexity Science Hub)  Following the thread of information: Insights from armed conflict, online reading, and innovation-obsolescence (Announcement )

7/29/2024 Dr. Jibeom Choi (Kyung Hee Univ.) Spatial simulation of autologous cell defection for cancer treatment (Announcement)

7/8/2024 Prof. Ulf Dieckmann (OIST) Complex adaptive systems at the interface of ecology, evolution, and socio-economic dynamics (Announcement)

5/20/2024 Dr. Sanjukta Krishnagopal (UC Berkeley&LA) Networks and higher-order modeling of society and opinions (Announcement)

5/7/2024 Mr. Jaeseok Hur (KAIST) Interplay of network structure and talent configuration on wealth dynamics & Money emergence with multi-agent reinforcement learning (Announcement)

3/26/2024 Dr. Bukyoung Jhun (CEU) Inference and reconstruction of latent macroscopic structure in complex networks (Announcement)

2/26/2024 Dr. Emil Mallmin (MPI) Rare fluctuations in nonequilibrium steady states (Announcement)

2023

12/18/2023 Dr. Min-Kyung Chae (NIMS) Evaluation of COVID‑19 intervention policies in South Korea using the stochastic individual‑based model (Announcement)

11/20/2023 Prof. Hayoun Lee (USC) Immune cell identification and classification with single cell RNA sequening data (Announcement )

10/6/2023 Prof. Youngjoo Cho (Konkuk U.) Statistical modeling : theory and applications (Announcement)

9/25-9/28/2023 Vermont-KIAS Workshop: Group Interactions in Network Science (webpage) 

8/2 - 8/6/2023 Statphys28 Satellite Meeting: New Frontiers in Complex Networks (webpage )

7/30 - 31/2023 KIAS-KENTECH Mini Workshop (webpage )

3/14 - 3/17/2023 KIAS-Vermont Workshop (webpage)

3/8 - 3/9/2023 MEEW2023 (webpage)

2022

10/27 - 10/29/2022 Modeling on Ecology and Evolution Workshop (MEEW2022)  (webpage ) 

09/26 - 09/30/2022 KIAS-KU International workshop: Theoretical Challenges in Network Science  (registration by 09/14, webpage)

08/02/2022 Prof. Jinhyuk Yun (Soongsil U.)  Analysis of risk propagation using the world trade network (Announcement )

7/20/2022 Prof. Euncheol Shin (KAIST) Strategic Sophistication and Collective Action: Theory and Evidence from the COVID-19 Pandemic (Announcement )

6/27/2022 Dr. Yongsun Lee (KENTECH) Brief introduction to graph convolutional networks (Announcement )

6/27/2022 Dr. Jongshin Lee (KENTECH) (k,q)-core percolation process on hypergraphs (Announcement )

6/16/2022  Prof.  Young-ho Eom  (Univeristy of Seoul)  Characterizing the structure and dynamics of urban traffic flow: The case of Seoul (Announcement )

2021

8/20/2021 KIAS Public health sciences workshop (Web)

8/9 & 8/11/2021 Dr. Ryo Hanai (APCTP) Non-reciprocal phase transitions (part 1 , part 2 )

7/30/2021 Dr. Kookyoung Han (UNIST) A reputation game on cyber-security and cyber-risk calibration (Announcement )

7/7/2021 Dr. Hyun-Gyu Lee (Korea Univ.)  Neighbor-enhanced motility of breast cancer cells (Announcement )

6/23-6/25/2021 KIAS workshop on Complex Systems and Data Science (Web)

4/28/2021 Dr. Sungmin Hwang (CFM) Jamming in multilayer supervised learning models (Announcement)

3/24/2021 Dr. Matthieu Barbier (CIRAD) Disordered systems and simplicity in many-species ecological dynamics (Announcement)

2020

12/1/2020 Prof. Hye Jin Park (APCTP) Extinction dynamics from meta-stable coexistences in ecological systems (Announcement )


People

Current

Prof. Deok-Sun Lee (Comp. Sci. & CAINS, 9/1/2020 - present, CV Google Scholar Researchgate ORCID)

Dr. Sudo Yi (Comp. Sci., 3/1/2021 - present,  Google Scholar)

Dr. Hyun Gyu Lee (Comp. Sci., 10/1/2021 - present, Google Scholar )

Dr. Andrus Giraldo Munoz (Comp. Sci., 1/25/2022 - present,  Google Scholar)

Dr. Gangmin Son (Comp. Sci. 3/1/2024 - present, Google Scholar)

Dr. Min-Kyung Chae (Comp. Sci. 9/16/2024 - present, Google Scholar )

Ms. Jihye Kim (Graduate student fellow at Comp. Sci. 1/1/2024 - present, Google Scholar)


Alumni

@KIAS (2020~)
Dr. Seong-Gyu Yang (Research fellow at Comp. Sci., 2/1/2023 - 3/31/2024,  Web) Umeå University, Sweden
Prof. Eunho Koo (Research fellow at CAINS, 3/1/2022 - 2/29/2024, Google Scholar) Dept. Big Data Convergence, Chonnam Nat'l Univ.
Dr. Seungwoong Ha (Research fellow at Comp. Sci., 3/16/2023 - 6/16/2023, Web) Santa Fe Institute, USA
Prof. Jongmin Lee (Research fellow at CAINS, 9/1/2022 - 2/28/2023, Web) Dept. Statistics, Pusan Nat'l Univ.
Mr. Nicolas Errandonea (Visiting student, 7/18/2022 -8/26/2022 )

@Dept. Physics, Inha University (~ 2020)

Mr. Hyun Woo Lee (MS: 9/1/2019 - 8/31/2021) under Prof. Jae Woo Lee at Inha University

Prof. Mi Jin Lee (postdoc; 3/1/2017 - 8/31/2020) Dept. Applied Physics, Hanyang University

Dr. Hyung-Ha Yoo (MS: 3/1/2014 - 2/28/2016, PhD: 3/1/2016 - 2/29/2020)

Mr. Sung-Gook Choi (BS: 9/1/2016 - 2/28/2017, MS: 3/1/2017 - 8/31/2019) Korea Securities Depository

Mr. Min Seok Kim (MS: 3/1/2017 - 2/28/2019) 

Mr. Heung Kyung Kim (MS: 3/1/2017 - 2/28/2019) Mesh Korea, Co. Ltd.

Mr. Jaegu Kyoung (MS course: 3/1/2013-9/23/2017 incomplete) 

Mr. Seong-Seok Lee (BS: 1/1/2015 - 2/28/2017)

Dr. Seong Eun Maeng (postdoc: 3/1/2016 -2/28/2017 ) BizData, Korea

Dr. Kanghun Kim (postdoc: 2/1/2014 - 4/26/2016) Hana Financial Investment, Korea

Mr. Chang-Young Oh (BS: 3/1/2014 - 5/31/2015) ASML Korea, Co. Ltd., Korea

Mr. Gyeong-Gyun Ha (MS: 3/1/2014 - 8/31/2015) King's College London, UK

Dr. Matthieu Barbier (postdoc: 1/1/2013 - 4/12/2014)  CIRAD, France

Research area 

Publications

Deok-Sun Lee's Google Scholar

Contact information

Deok-Sun Lee, Ph.D

Professor

School of Computational Sciences

Korea Institute for Advanced Study

85 Hoegiro, Dongdaemun-gu

Seoul 02455, Korea


Phone: 82-2-958-3881

Email: deoksunlee_at_kias.re.kr