Research

Last updated: 20 September 2025

Publication

Journal Paper (* : corresponding author)

  1. A. Jampeepan, S. Chaidee, and P. Inkeaw (2025). A Geometrical Approach for Identifying the Corners of Convex Bodies Composed by Circular Arcs. ScienceAsia, 51S (2):ID 2025s021 1-8; [DOI: doi: 10.2306/scienceasia1513-1874.2025.s021]
  2. P. Sukkasem, S. Chaidee*, W. Khokthong (2025), An Algorithm for Illuminating n Nonoverlapping Circular Discs’ Boundaries on the Plane with Application to Tree Stem Illumination Problem. ScienceAsia, 51S (2):ID 2025s018 1-11 ; [DOI: 10.2306/scienceasia1513-1874.2025.s018]
  3. K.Chaichana, S. Chaidee, S. Panma, N. Sukantamala, N. Peyrone, A. Khemphet. (2025) Influence of Regional PM2.5 Sources on Air Quality: A Network-Based Spatiotemporal Analysis in Northern Thailand, Mathematics 2025, 13(15), 2468; [DOI:10.3390/math13152468]
  4. T. Keelapang, S. Chaidee*. P. Sripratak, T. Kittipraparsorn, T. Taniguchi, R. Uehara. (2025) Enumeration on Convex Configuration of Lucky Puzzle. Experimental Mathematics, pp.1-15 [DOI:10.1080/10586458.2025.2483281]
  5. S. Chaidee, P. Inkeaw, T. Mekee, K. Khamyod, S. Angkurawaranon, P. Traisathit,  T. Vaniyapong, I. Chitapanarux (2023). Comparative Analysis between Different Volumetric Methods on Measuring Intracranial Hemorrhage Incorporating Roundness Index, PLoS ONE, 18(10): e0292092, pp.1-20 [DOI:10.1371/journal.pone.0292092]
  6. K. Sriamorn, S. Sriswasdi and S. Chaidee* (2023). The Non-Existence of Convex Configuration for a Given Set of Radii in Two-Dimensional Space. Carpathian Journal of Mathematics, 39:2, pp. 491-510 [DOI:10.37193/CJM.2023.02.11]
  7. K. Chaichana, A. Kitro, S. Chaidee and T. Rojsiraphisal (2021), The potential effects of temperature on outpatient visits: a case study in Chiang Mai, Thailand, Environmental Science and Pollution Research, 28, pp 64431–64439 (2020IF 4.223) [DOI:10.1007/s11356-021-15512-y]
  8. V. Suppakitpaisarn, A. Ariyarit & S. Chaidee* (2021), A Voronoi-based method for land-use optimization using semidefinite programming and gradient descent algorithm, International Journal of Geographical Information Science, 35:5, 999-1031 (2019IF 3.733 ) [DOI: 10.1080/13658816.2020.1841203]
  9. S. Chaidee* and K. Sugihara (2020), The Existence of a Convex Polyhedron with Respect to the Constrained Vertex Norms. Mathematics 2020, 8, 645. (2018IF 1.105) [DOI:10.3390/math8040645]
  10. S. Chaidee* and K. Sugihara (2020), Laguerre Voronoi Diagram as a Model for Generating the Tessellation Patterns on the Sphere, Graphs and Combinatorics,  36, pp 371–385 (2018IF 0.481) [DOI:10.1007/s00373-019-02006-5]
  11. S. Chaidee* and K. Sugihara (2018), Spherical Laguerre Voronoi Diagram Approximation to Tessellations without Generators, Graphical Models 95, pp. 1 – 13 (2016IF 1.188) [DOI:10.1016/j.gmod.2017.11.002]
  12. S. Chaidee and W. Wichiramala (2016), Optimal Partitioning of a Square : Numerical Approach, ScienceAsia 42:2, pp. 150 – 157  (2016IF 0.343) [DOI 10.2306/scienceasia1513-1874.2016.42.150]
  13. S. Chaidee* and K. Sugihara (2015), Numerical Fitting of Planar Photographic Image with Spherical Voronoi Diagrams, Computer Aided Drafting, Design and Manufacturing (CADDM) 25:4, pp. 26-31. [This paper is invited paper from AFGS conference.]
  14. S. Chaidee* and K. Sugihara (2017), Approximation of Fruit Skin Patterns Using Spherical Voronoi Diagram, Pattern Analysis and Applications, 20:3, pp. 783–795 (2016IF 1.352) [DOI 10.1007/s10044-016-0534-2]

Reviewed Proceeding (International Conference)

  1. P. Suriya, V. Suppakitpaisarn, S. Chaidee, P. Sukkasem (2023). Submodularity Property for Facility Locations of Dynamic Flow Networks, In Proc. of The 23rd Symposium on Algorithmic Approaches for Transportation Modelling, Optimization, and Systems (ATMOS 2023), Open Access Series in Informatics (OASIcs), pp. 10:1-10:13. [DOI:10.4230/OASIcs.ATMOS.2023.10]
  2. C. Sawatdithep and S. Chaidee (2023). Recognition of Archimedean Spiral Voronoi Diagrams from Linear Parastichies. L.-Y. Cheng (Ed.): ICGG 2022, LNDECT 146, pp. 441–453, Springer, 2023. [DOI:10.1007/978-3-031-13588-0_38]
  3. S. Chaidee, P. Pakawanwong, V. Suppakitpaisarn, P. Teerasawat (2017), Interactive Land-Use Optimization Using Laguerre  Voronoi Diagram with Dynamic Generating Point Allocation, The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLII-2/W7, 2017 (ISPRS Geospatial Week 2017),  pp. 1091-1098. [DOI:10.5194/isprs-archives-XLII-2-W7-1091-2017]
  4. S. Chaidee and K. Sugihara (2016),Fitting Spherical Laguerre Voronoi Diagrams to Real World Tessellations Using Planar Photographic Images, J. Akiyama et al. (eds.): Discrete and Computational Geometry and Graphs (LNCS 9943), Springer, 2016, pp. 73-84. [DOI:10.1007/978-3-319-48532-4_7]
  5. S. Chaidee and K. Sugihara (2015), Numerical Fitting of Planar Photographic Image with Spherical Voronoi Diagrams, In Proc. of the 10th Asian Forum on Graphic Science (2015).

Research Wordcloud from https://www.wordle.net/
(Information based on journal papers and  Proceedings in the international conferences on January 2, 2024)

308857336207

Reviewed Proceeding (Domestic Conference)

  1. A. Jampeepan, S. Chaidee, Geometric Data Analysis for Classifying Patterns of Points Derived from Partial Circle,In Proc. of the Thailand 29th Annual Meeting in Mathematics (2025), 747-761
  2. W. Chaipunya and S. Chaidee. Development of the Mastery Learning Self-study Package on Geometry for Upper Secondary Students by Comparing Classical and Analytical Geometry Concepts. In Proc. of the Thailand 26th Annual Meeting in Mathematics (2022), 397-411. (in the Thai language)
  3. S. Chaidee and W. Wichiramala (2013), Numerical Approach to the Optimal Partitioning of a Square Problem, In Proc. of the Thailand 18th Annual Meeting in Mathematics (2013), 199-206.

Papers in Processes

  • T. Yoshino, S. Chaidee. Apple Peel Unfolding of Archimedean and Catalan Solids. submitted to Journal of Mathematics and Arts
  • P. Suriya, P. Sukkasem, S. Chaidee, V. Suppakitpaisarn. Submodularity-Based and Metaheuristic Approaches for Facility Location in Dynamic Flow Networks. In preparation
  • P. Sukkasem, S. Chaidee, Properties of the Region Generated by Slabs Intersection of a Set of Three Circles, submitted to Journal of Geometry and Graphics.

Ongoing Project (Manuscript in preparation)

  • P. Jaima, P. Homsombut, S. Chaidee. Decomposition of Polyhedra to Polylinks
  • N. Rintaew, S. Chaidee. Squares in Trapezoids
  • S. Chaidee and Y. Chao. Convex Decomposition Arising from Geometric Triangulation

Preprints

  • S. Chaidee and K. Sugihara, Recognition of Spherical Laguerre Voronoi Diagram Arxiv

Proceedings (Book of Abstracts)

  1. P. Sukkasem, S. Chaidee and A. Kittiya, Geometric Strategy Analysis for Magnetic Chess Game, In Proc. of The 25th China-Japan Conference on Discrete and Computational Geometry, Graphs, and Games (CJCDCGGG’25), pages 81-82, 2025 Here
  2. Woraphan Wattana and Supanut Chaidee, Geometrical Analysis for Closed-loop Kirigami with Applications to Cutting Pattern of Tung Sai Moo, In Proc. of the 15th Asian Forum on Graphic Science (AFGS2025), pages 24-25, 2025
  3. S. Chaidee, T. Yoshino, N. Ploymaklam. Design and Approximation of Three-dimensional Stella-liked Shapes Using Spherical Voronoi Diagrams. In Proc. of The 24th Japan Conference on Discrete and Computational Geometry, Graphs, and Games (JCDCGGG’24), pages 88-89, 2024. Here
  4. T. Keelapang, S. Chaidee, P. Sripratak. Enumeration on the Convex Composition of Polygons in Lucky Puzzle. In Proc. of The 25th Indonesia-Japan Conference on Discrete and Computational Geometry, Graphs, and Games (IJCDCGGG’23), pages 11, 2023. Here
  5. S. Chaidee, P. Homsombat, and P. Jaima. A Family of Convex Polyhedra Generated by Regular Polylinks. In Proc. of The 24th Japan Conference on Discrete and Computational Geometry, Graphs, and Games (JCDCGGG’22), pages 21-22, 2022. Here
  6. N. Rintaew and S. Chaidee. The Conditions for Fitting a Square in a Trapezoid , In Proc. of The 23rd Thailand-Japan Conference on Discrete and Computational Geometry, Graphs, and Games (TJCDCGGG 2020+1), pages 90-91, 2021.  Here
  7. K. Sriamorn, S. Sriswasdi and S. Chaidee. The Non-Existence of Convex Configuration for a Given Set of Radii in Two-Dimensional Space, In Proc. of The 22nd Japan Conference on Discrete and Computational Geometry, Graphs, and Games (JCDCGGG’19), pages 113-114, 2019. Here
  8. S. Chaidee, S. Nishida and N. Phetmak, Geometrical Analysis of Crane Game in Two Dimensions, In Proc. of The 21st Japan Conference on Discrete and Computational Geometry, Graphs, and Games (JCDCGGG’18), pages 43-45, 2018. Here
  9. S. Chaidee and K. Sugihara, Laguerre Voronoi Diagram as a Model for Generating the Tessellation Patterns on the Sphere, In Proc. of The 20th Japan Conference on Discrete and Computational Geometry, Graphs, and Games (JCDCGGG’17), pages 33-34, 2017. Here
  10. S. Chaidee and K. Sugihara, Recognition of the Spherical Laguerre Voronoi Diagram, In Computational Geometry Week 2016: Young Researcher Forum , pages 5-6, 2016. Here
  11. S. Chaidee and K. Sugihara, Laguerre Voronoi Diagram as a Tool for Fitting Spherical Tessellations Using Planar Photographic Images, In Proc. of The 19th Japan Conference on Discrete and Computational Geometry, Graphs, and Games (JCDCGGG’16), pages 60-61, 2016. Here
  12. S. Chaidee and K. Sugihara, Approximation of a Spherical Tessellation by the Laguerre Voronoi Diagram, In Proc. of the 32th European Workshop on Computational Geometry (EuroCG’16), page 143 – 146, 2016. Here
  13. S. Chaidee and K. Sugihara. Fitting spherical Laguerre Voronoi diagrams to real world tessellations using planar photographic images. In Proc. of the 18th Japan Conference on Discrete, Computational Geometry, and Graphs (JCDCGG’15), pages 40-41, 2015
  14. S. Chaidee and K. Sugihara, A Method for Fitting Real World Tessellations with Voronoi Diagrams, In Proc. of the 31th European Workshop on Computational Geometry (EuroCG’15), page 192 – 195, 2015. Here
  15. S. Chaidee and K. Sugihara. Comparison between curved-surface tessellations and the Voronoi diagrams using planar photographic images. In Proc. of the 17th Japan Conference on Discrete, Computational Geometry, and Graphs (JCDCGG’14), pages 11-12, 2014
  16. S. Chaidee and W. Wichiramala. Optimal Partitioning of a Square Problem: Numerical Approach. In Proc. of the 16th Japan Conference on Discrete and Computational Geometry (JCDCGG’13), pages 58-59, 2013. Here

Presentation

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International Conferences (Oral Presentation)

Poster Presentation

Domestic Conferences

Academic Meetings (Oral Presentation)

Short Visiting for Research Activities

  • 2023 April – May (38 days): The University of Tokyo, Toyo University, and Tokyo University of Science, Japan
  • 2022 May – June (22 days): Toyo University, Saitama, Japan
  • 2019 June-July (11 days): Sun Yat-Sen University, Guangzhou, China
  • 2019 March (9 days): Sun Yat-Sen University, Guangzhou, China
  • 2018 July – September: Visiting Scholar at Meiji Institute for Advanced Study of Mathematical Sciences (MIMS), Meiji University, Tokyo, Japan, under the FYI2018 Follow-up Research Fellowship by JASSO

Invited Talks / Seminars

Research Grants (as Principal Investigator)

  • March 2019 – February 2021: TRF-CHE Research Grant for New Scholar
    • แผนภาพลาแกร์โวโรนอยบนทรงกลมแบบมัธยฐานสำหรับการศึกษาและจำลองเทสเซลเลชันบนทรงกลม
    • Centroidal spherical Laguerre Voronoi diagram for understanding and modeling spherical tessellation patterns
  • October 2018 – 2019: Faculty of Science Research Grant.
    • การวิเคราะห์เชิงเรขาคณิตสำหรับปัญหากล่องบนคานรูปสี่เหลี่ยมคางหมู
    • Geometrical analysis of a box on the trapezoidal beam problem
  • October 2017 – 2018: Faculty of Science Research Grant.
    • แผนภาพลาแกร์โวโรนอยบนทรงกลมสำหรับจำลองรูปแบบเทซเซลเลชันในธรรมชาติ
    • Spherical Laguerre Voronoi diagram for modeling the tessellation patterns in real world.

Research Grants (as Project Member)

  • November 1, 2021 – October 31, 2024 [PMU-B]
    • การพัฒนาและถ่ายทอดเทคโนโลยีปัญญาประดิษฐ์ในการวินิจฉัยผู้ป่วยที่ได้รับบาดเจ็บทางสมอง
    • Development and transfer of technology, artificial intelligence techniques in the diagnosis of patients with brain injury
  • October 1, 2023 – September 30, 2024 [Fundamental Fund 67]
    • การบูรณาการเชิงคณิตศาสตร์เพื่อการบริหารจัดการปัญหา PM2.5 (Fundamental Fund 2567)
    • Integrated mathematical approaches to PM2.5 management (Fundamental Fund 2567)
  • October 1, 2022 – September 30, 2023 [Fundamental Fund 66]
    • การวิเคราะห์ข้อมูลการเปลี่ยนแปลงสภาพภูมิอากาศของประเทศไทยเชิงลึก เพื่อสร้างตัวแบบทางคณิตศาสตร์สำหรับทำนายปัจจัยสภาพภูมิอากาศที่มีผลกระทบต่อภาคการเกษตร ทรัพยากรน้ำ และปัญหาฝุ่นพีเอ็ม 2.5
    • In-depth Analysis of Thailand’s Climate Change Data for Predictive Modeling of Climatological Impact on Agriculture, Water Resources and PM2.5 Problems

Other Grants

  • May – June 2022: Toyo University Short-term International Visiting Professor Program
  • July – September 2018: FYI 2018 Follow-up Research Fellowship by JASSO
  • September 2017: The ISPRS Foundation (TIF) travel grant to attend ISPRS Geospatial Week 2017 (18 – 22 September 2017) at Wuhan, China.

Research Experience

  • 2013-2014 Chulalongkorn University, Bangkok, Thailand
    • Research Assistant;  Department of Mathematics and Computer Science
      • Research Topic: Improvement Results of Optimal Partitioning of a Square
      • Advisor: Asst.Prof. Wacharin Wichiramala, Ph.D.
  • 2007 10th Junior Science Talent Project
    • Research Fund for Upper Secondary School and Undergraduate Student by National Science and Technology Development Agency (NSTDA), Thailand
    • Research Topic: Some Algebraic Properties of O(Zn)
    • Advisor: Prof. Jintana Sanwong

Academic Membership