CV

Last Updated: Aug. 28 2019

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Professional Experiences

Sep. 2020 - present: Assistant Professor at Incheon National University.
Feb. 2019 - Aug. 2020: Research Scientist at Georgia Institute of Technology.
(PI: Munmun De Choudhury)
Aug. 2012 - Feb. 2019: Research Assistance at Seoul National University.
(Supervisors: Prof. Ted “Taekyoung” Kwon and Prof. Yanghee Choi )
Aug. 2016 - Dec. 2016: Visiting Researcher at HEIG-VD, Swithzerland.
Aug. 2007 - Jan. 2010: Software Engineer at GameVil Inc.

Education

Ph.D in Electronic Engineering and Computer Science, Seoul National University, 2019.02
- Thesis:”Understanding and Predicting User Behavior and Content Propagation Patterns in Internet: A Data-Scientific Approach”
  Supervisors: Prof. Ted “Taekyoung” Kwon and Prof. Yanghee Choi
B.S. in Computer Science and Engineering (Mathematics as Minor), Korea University, 2012.08

Selected Publications

see here for all publications.

2020
- “Rumor Propagation is Amplified by Echo Chambers in Social Media”,
  Daejin Choi, Selin Chun, Hyunchul Oh, Jinyoung Han, and Ted “Taekyoung” Kwon,
  Scientific Reports. Vol. 10, Issue 1, pp. 310. Jan. 2020. (DOI:10.1038/s41598-019-57272-3, SCI. IF=4.122)
2019
- “Who Drives Successful Online Conversations? Unveiling the Role of First User Response”,
  Ye-eun Won, Jiwon Kang, Daejin Choi, Eunil Park, and Jinyoung Han,
  Kybernetes, Accepted. (DOI: 10.1108/K-09-2018-0518)
- “Understanding Customers’ Hotel Revisiting Behaviour: A Sentiment Analysis of Online Feedback Reviews”,
  Eunil Park, Jiwon Kang, Daejin Choi, and Jinyoung Han
  Current Issues in Tourism, Accepted. (DOI: 10.1080/13683500.2018.1549025)
- “Predicting Content Consumption from Content-to-Content Relationships”,
  Jinyoung Han, Daejin Choi, Taejoong Chung, Chen-Nee Chuah, Hyun-chul Kim, and Ted “Taekyoung” Kwon,
  Elsevier Journal of Network and Computer Applications (JNCA), April 2019. (DOI: 10.1016/j.jnca.2019.01.030)
2018
- “Privacy Leakage in Event-based Social Networks: A Meetup Case Study”,
  Taejoong Chung, Jinyoung Han, Daejin Choi, Taekyoung Kwon, Jong-Youn Rha, and Hyunchul Kim,
  ACM Conference on Computer-Supported Cooperative Work and Social Computing (CSCW`18), Jersey City, United States, November 2018. (acceptance ratio = 105/384 = 27.3%)
- “Understanding Influential Comments in Online Conversations”,
  Jiwon Kang, Daejin Choi, Eunil Park, and Jinyoung Han,
  ACM Conference on Computer-Supported Cooperative Work and Social Computing (CSCW`18), Jersey City, United States, November 2018. (poster)
- “Unveiling a Socio-Economic System in a Virtual World: A Case Study of an MMORPG”,
  Selin Chun, Daejin Choi, Jinyoung Han, Huy Kang Kim, and Taekyoung Kwon,
  International World Wide Web Conferenc (WWW) 2018, Ryon, France, April 2018.
- “Bit.ly/practice: Uncovering Content Publishing and Sharing through URL Shortening Services”,
  Daejin Choi, Jinyoung Han, Selin Chun, Efstratios Rappos, Stephan Robert, and Ted “Taekyoung” Kwon,
  Elsevier Telematics and Informatics, Vol. 35, Issue 5, pp. 1310-1323, August 2018. (DOI: 10.1016/j.tele.2018.03.003
2017
- “Predicting Popular and Viral Image Cascades in Pinterest”,
  Jinyoung Han, Daejin Choi, Jungseock Joo and Chen-Nee Chuah,
  International AAAI Conference on Web and Social Media (ICWSM 17’), Montreal, Canada, 2017.
  (acceptance ratio = 50/357= 14.0%)
Before 2016
- “Characterizing Conversation Patterns in Reddit: From the Perspectives of Content Properties and User Participation Behaviors”,
  Daejin Choi, Jinyoung Han, Taejoong Chung, Yong-Yeol Ahn, Byung-Gon Chun, Ted “Taekyoung” Kwon,
  ACM Conference on Online Social Networks (COSN) 2015, Standford, CA, USA, Nov. 2015.
  (acceptance ratio = 22/82 = 26.8%)
- “Sharing Topics in Pinterest: Understanding Content Creation and Diffusion Behaviors”
  Jinyoung Han, Daejin Choi, A-Young Choi, Jiwon Choi, Taejoong Chung, Ted “Taekyoung” Kwon, Jong-Youn Rha, Chen-Nee Chuah,
  ACM Conference on Online Social Networks (COSN) 2015, Standford, CA, USA, Nov. 2015.
  (acceptance ratio = 22/82 = 26.8%)
- “Collecting, Organizing, and Sharing Pins in Pinterest:Interest-driven or Social-driven?”,
  Jinyoung Han, Daejin Choi, Byung-Gon Chun, Ted “Taekyoung” Kwon, Hyun-chul Kim and Yanghee Choi,
  ACM SIGMETRICS, Austin, Texas, USA, Jun. 2014. (acceptance ratio = 40/238 = 16.8%)
  Also published in ACM SIGMETRICS Performance Evaluation Review, Vol. 42, Issue 1, pp. 15-27, Jun. 2014.
- “Unveiling Group Activities in Online Social Games: A Socio-Economic Analysis”,
  Taejoong Chung, Jinyoung Han, Daejin Choi, Ted “Taekyoung” Kwon, Huy Kang Kim and Yanghee Choi,
  International World Wide Web (WWW) 2014, Seoul, Korea, Apr. 2014. (acceptance ratio = 84/650 = 12.9%)

Patents

Ted “Taekyoung” Kwon, Daejin Choi, Selin Chun, Minhyeok Kang,
“A Long Short Term Memory-based Recurrent Neural Network Method to Predict per-Service Temporal Trac Amount in Data Center”
Korea patent, Pending no. 10-2019-0014970 (Feb. 8, 2019).
Ted “Taekyoung” Kwon, Minkyung Park, Sungmin Sohn, and Daejin Choi,
“Credit-based Multipath Transmission Method for Datacenter Network Load Balancing”
Korea patent, Registraction no. 10-1932138 (Dec. 18, 2018).
Ted “Taekyoung” Kwon, Yanghee Choi, Daejin Choi, Youngbin Im, Yoon Kwon, and Junho Suh, “Content Routing Method and Architecture”
Korea patent, Pending no. 10-2014-0072835 (Jun. 16, 2014).

Talks

[Conference Talk] Characterizing Online Conversations on Reddit:From the Perspectives of Content Properties and User Participation Behaviors

November 03, 2015

Talk at Stanford University, California, USA

[Conference Talk] Predicting Popular and Viral Image Cascades in Pinterest

May 18, 2017

Tutorial at Montreal, Canada

[Invited Talk] Computational Social Science with Graph Modeling

May 25, 2018

Invited Talk at Hanyang University (ERICA), Ansan, South Korea

[Invited Talk] Data Science & Machine Learning Tutorial

January 22, 2019