Visiting Professor, College of Software, Sungkyunkwan University (September 2019 ~ Current)
Research Topic : Big Data Platform / Text Mining / Machine Learning
Education Topic : Data Mining / Art & Big Data / Big Data Platform / System Programming Lab / R Programming
Research Professor, Consumer & Family Sciences, Sungkyunkwan University (June 2016 ~ August 2019)
Research Topic : Big data based Consumer Analysis / Text Mining / Machine Learning
Education Topic : Introduction to Big Data / Big Data Analysis / Advanced Big Data Analysis / R / Python / Data Visualization / Linux
CEO, DaeGyeom IT (Originally, Themost Consulting Co., LTD) (2012 ~ 2024)
Vision : Knowledge Value Creation for Intelligentsia
Services : Analysis, Planning, Development, Distribution, and more
Fields : Computer Sciences / Information Communications & Networking
Head of Research Center, Geasoft Co., LTD (January 2015 ~ June 2016)
Research & Development : Collaborative & Communication Solution
Director, Research and Development Center, CHAHOO Limited (August 2010 ~ September 2012)
Smart Pipeline Management System (http://www.youtube.com/watch?v=fh_bYh_m1SQ) using IT Convergence Technologies such as Location Based Service, QR Code Recognition, Augmented Reality, GIS Map, and more.
Smart Builder
Smart Explorer
Smart Power Surveyor
Smart GPS Controller
Postdoctoral Fellow, Computer Sciences Department, University of Wisconsin – Madison, WI, USA (November 2007 ~ February 2010)
Advisor: Prof. Suman Banerjee
Researched and studied the adaptive and intelligent next generation transport protocol for heterogeneous networks.
Improved TCP performance (e.g. throughput, goodput, fairness, friendliness) in integrated wireless communications networks.
Studied loss differentiation schemes (e.g. TCP NewReno-LP, JTCP, Jersey, Veno) for TCP over wireless networks.
Proposed timestamp and congestion level index based available bandwidth estimation scheme.
Compared various TCP versions (e.g. TCP New Jersey, Westwood, Vegas, Reno) using ns-2 simulator.
Designed and implemented random simple error model for uncorrelated losses and multi-state error model for correlated losses (e.g. multi-path fading) in NS-2 simulator.
Research Professor, Intelligent HCI Convergence Research Center, School of Information and Communication Engineering, Sungkyunkwan University, South Korea (March 2006 ~ August 2007)
Coordinated with HCI research groups (Sungkyunkwan Univ., Yonsei Univ., Korea Univ., Chungbuk National Univ.) for ITRC research project.
Organized the parallel session of “Intelligent HCI Convergence” at HCI international conference 2007.
Instructor, Sungkyunkwan University, South Korea (March 2003 ~ February 2006)
Taught several undergraduate courses (System Programming, Object-Oriented Programming) and graduate courses (Computer Networks, Computer Security).
Infrastructure Engineer, LG CNS (originally, LG-EDS), South Korea (October 1999 ~ August 2002)
Designed and implemented Microsoft Windows 2000 Server Services (e.g. Directory Service, Networking Service).
Determined and proposed computer platform (HP), operating system (HP-UX), and database system (Oracle) of a next-generation credit card system for Industrial Bank of Korea through capacity planning.
Designed and implemented the paper-to-digital document conversion center, making transition from paper-based to electronic-based document systems for Korea Intellectual Property Office.
Installed and maintained a workflow based document imaging server for patent application locating and monitoring system.
Collaborated with all members of the workflow software developers and OCR/ICR developers to ensure total document imaging system development.
Designed and implemented system architecture of sports TOTO game for Korea Sports Promotion Foundation.
Constructed 3-way cluster servers for main game systems using Compaq AlphaServer ES45 and storage area network using EMC disk array.
Designed and implemented a backup center for data backup and disaster recovery.
Designed and implemented several servers (e.g. web servers, backup servers, firewall server, security monitoring server).
Troubleshot Microsoft Exchange servers for Korea Honeywell and Microsoft SQL server for KBS Media Enterprises through divide-and-conquer approach.
System Engineer, Korea Information Systems, South Korea (January 1997 ~ September 1999)
Designed and developed Internet disclosure information systems for Korea Financial Investment Association.
Used client-side solutions (e.g. Javascript, VBScript, Dynamic HTML, Web forms, ActiveX control) and server-side solutions (e.g. ASP, remote database access)
Designed, developed, and maintained a web and bulletin board server for Korea Information Systems.
Installed and maintained Microsoft IIS server and SQL server.
Developed an enterprise bulletin board system using web application technologies.