• Advisory Committees: ISAAC (International Symposium on Algorithms and Computation
• Program Committees: during last 5 years,

  ICALP'15 / AAAC'15 / COCOON'15 / FAW'15 / MFCS'15 / FAW'16 / AAAC'16 / WADS'17 / AAAC'17 / WALCOM'18 / FAW'18 / AAAC'18 / SoCG'19 / EuroCG'19 / AAAC'19

• PC co-chair: ISAAC'21, ISAAC'14 at Jeonju, Korea
  
• Editorial board member: Currently,

  Computational Geometry: Theory and Applications (CGTA) - CoEditor-in-Chief
  Algorithmica - guest editor for the special issue of ISAAC 2021
  Journal of Information Processing (JIP)
  Interdisciplinary Information Sciences (IIS)

• Board member of AAAC - Asian Association for Algorithms and Computation
• General secretary of KWCG- Korean Workshop on Computational Geometry ( KWCG 2023 at Thailand )
• Organizer of FWAC - Fall Workshop on Algorithms and Computation (2018 / 2016)
• Member of GaiA - Geometry And Its Applications

• Polygon Subdivision

  - Farthest-point Voronoi diagrams in the presence of rectangular obstacles.
  Symposium on Computational Geometry, 2022.
  - A New Balanced Subdivision of a Simple Polygon for Time-Space Trade-off Algorithms.
  Algorithmica, 2019.
  - Voronoi Diagrams for a Moderate-Sized Point-Set in a Simple Polygon.
  Discrete & Computational Geometry, 2019.
  - Point Location in Dynamic Planar Subdivisions.
  34th International Symposium on Computational Geometry (SoCG 2018)
  - A linear-time algorithm for the geodesic center of a simple polygon.
  Discrete & Computational Geometry 56(4), pages 836-859, 2016. (on invitation, SoCG 2015)
  - Reachability by paths of bounded curvature in a convex polygon.
  Computational Geometry: Theory and Applications, 45(1-2), pages 21-32, 2012.

• Shape Matching

  - Largest similar copies of convex polygons in polygonal domains.
  41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2021)
  - Minimum Convex Container of Two Convex Polytopes under Translations.
  Computational Geometry: Theory and Applications, 77, pages 40-50, 2019. (on invitation, CCCG 2014)
  - Overlap of Convex Polytopes under Rigid Motion.
  Computational Geometry: Theory and Applications 47(1), pages 15-24, 2014.
  - A Generalization of the Convex Kakeya Problem.
  Algorithmica 70(2), pages 152-170, 2014. (on invitation, LATIN 2012)
  - Maximizing the Overlap of Two Planar Convex Sets under Rigid Motions.
  Computational Geometry: Theory and Applications 37, pages 3-15, 2007. (on invitation, ACM SoCG 2005)

• Nearest-neighbor Search and Clustering

  - Product Quantized Translation for Fast Nearest Neighbor Search.
  32nd AAAI Conference on Artificial Intelligence (AAAI-18)
  - Approximate Range Queries for Clustering.
  34th International Symposium on Computational Geometry (SoCG 2018), pages 62:1-62:14, 2018.
  - An Improved Data Stream Algorithm for Clustering.
  Computational Geometry: Theory and Applications 48(9), pages 635-645, 2015.
  - A Fast Nearest Neighbor Search Algorithm by Nonlinear Embedding.
  25th IEEE Conference on Computer Vision and Pattern Recognition (CVPR 2012)
  - Convergent Bounds on the Euclidean Distance.
  In Proc. 25th Annual Conference on Neural Information Processing Systems (NIPS 2011)

• Skyline Queries

  - MSSQ: Manhattan Spatial Skyline Queries.
  Information Systems 40, pages 67-83, 2014.
  - Spatial Skyline Queries: Exact and Approximation Algorithms.
  GeoInformatica, 15(4), pages 665-697, 2011. (on invitation, SSTD 2009 Best Paper)

• Casting

  - Casting an Object with a Core.
  Algorithmica 54(1), pages 72-88, 2009.
  - Casting with Skewed Ejection Direction.
  Algorithmica 44(4), pages 325-342, 2006.
  - Separating an Object from its Cast.
  Computer-Aided Design (CAD) 34(8), pages 547-559, 2002.

Algorithms (CSED331)
Advanced Algorithms (CSED536)
Discrete and Computational Geometry (CSED508/MATH570)

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[전시회] 음악프로듀서 가재발, 미술 전시회 개최 (2010.10) 동아일보
[SSTD2009 Best paper] 국제데이터베이스대회 최우수논문상 (2009.7) 연합뉴스
Algorithmic Audio-Visual Art
The Church tree / Mathematics Genealogy
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