ycanns - Overview

Hi there ๐Ÿ‘‹

I'm Yohan Chang

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๐Ÿง  About Me

My name is Yohan Chang, Ph.D. in Transportation Engineering (AI / Big Data / Visualization).

I am an Associate Research Fellow at the Smart Infrastructure Research Center, part of the National Infrastructure & Geospatial Information Research Division at KRIHS (Korea Research Institute for Human Settlements). Since 2022, Iโ€™ve been supporting OECD Geospatial Lab Workstream #5. In addition, I serve as:

  • A committee member of the Digital Division in the Open Government Partnership (OGP) (hosted by MoIS*)
  • An advisory member of the Public-Private Joint Data Analysis Council (MoIS)
    MoIS = Ministry of the Interior and Safety

With over 15 years of diverse experience in AI, Data Analytics, Data Science, GeoAI, Visualization, and policy-oriented modeling, Iโ€™m passionate about interdisciplinary collaboration and exploring new research frontiers.

[๐Ÿ‡ฐ๐Ÿ‡ท ํ•œ๊ธ€ ์†Œ๊ฐœ ๋ณด๊ธฐ]

์•ˆ๋…•ํ•˜์„ธ์š”! ์ €๋Š” ๊ตญํ† ์—ฐ๊ตฌ์›(KRIHS) ๊ตญํ† ์ธํ”„๋ผยท๊ณต๊ฐ„์ •๋ณด์—ฐ๊ตฌ๋ณธ๋ถ€์˜ ์Šค๋งˆํŠธ์ธํ”„๋ผ์—ฐ๊ตฌ์„ผํ„ฐ์—์„œ ๋‹ค์–‘ํ•œ ์—ฐ๊ตฌ๋ฅผ ์ˆ˜ํ–‰ํ•˜๊ณ  ์žˆ๋Š” ์žฅ์š”ํ•œ์ž…๋‹ˆ๋‹ค.

2022๋…„๋ถ€ํ„ฐ๋Š” OECD Geospatial Lab Workstream #5 ํ™œ๋™์— ์ฐธ์—ฌํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ๋Œ€ํ•œ๋ฏผ๊ตญ ์—ด๋ฆฐ์ •๋ถ€์œ„์›ํšŒ ์ œ4๊ธฐ ๋ฏผ๊ฐ„์œ„์›(๋””์ง€ํ„ธ๋ถ„๊ณผ)์œผ๋กœ๋„ ํ™œ๋™ ์ค‘์ž…๋‹ˆ๋‹ค. ๋˜ํ•œ, ํ–‰์ •์•ˆ์ „๋ถ€ ์ฃผ๊ด€์˜ ๋ฏผ๊ด€ํ•ฉ๋™ ๋ฐ์ดํ„ฐ๋ถ„์„ํ˜‘์˜์ฒด์—์„œ๋„ ๋ฏผ๊ฐ„์œ„์›์œผ๋กœ ์ฐธ์—ฌํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์ €๋Š” 15๋…„ ์ด์ƒ์˜ AI, ๋ฐ์ดํ„ฐ ๋ถ„์„, ๋ฐ์ดํ„ฐ ์‚ฌ์ด์–ธ์Šค ๊ฒฝํ—˜์„ ๋ฐ”ํƒ•์œผ๋กœ, ITS, GeoAI, ์‹œ๊ฐํ™”, ์ •์ฑ… ๊ธฐ๋ฐ˜ ๋ชจ๋ธ๋ง ๋“ฑ์˜ ๋ถ„์•ผ์—์„œ ์œตํ•ฉ์  ์—ฐ๊ตฌ์™€ ํ˜‘์—…์„ ์ด์–ด๊ฐ€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.



๐Ÿ’ผ Areas of Expertise

With deep interdisciplinary knowledge and technical fluency, I work across data, AI, and infrastructure systems in both research and real-world applications.

  • ๐Ÿง  Machine Learning & AI: Neural Networks, Random Forest, Deep Neural Networks (DNN), t-SNE, Reinforcement Learning
  • ๐ŸŒ Big Data & GeoAI: Data fusion, geospatial analytics, spatio-temporal modeling, GeoAI, Foresting/Estimation
  • ๐Ÿ—บ๏ธ GIS & Spatial Analysis: Tools: QGIS, Mapbox, Leaflet, Folium, PostgreSQL/PostGIS
  • ๐Ÿšฆ Transportation Systems Modeling: VISSIM (COM/API), EMME/2, TransCAD, DynusT, Naturalistic Driving Study (NDS)
  • ๐Ÿ“Š Data Visualization & Tools: Python, R, MATLAB, VBA, Jupyter, interactive dashboards (R Shiny)
[๐Ÿ‡ฐ๐Ÿ‡ท ํ•œ๊ธ€ ์†Œ๊ฐœ ๋ณด๊ธฐ]

ํ•™์ œ ๊ฐ„ ์ง€์‹๊ณผ ๊ธฐ์ˆ  ์—ญ๋Ÿ‰์„ ๋ฐ”ํƒ•์œผ๋กœ, AI, ๊ณต๊ฐ„(geospatial) ๋ฐ ์ธํ”„๋ผ ๋ถ„์•ผ์—์„œ ์—ฐ๊ตฌ์™€ ์‹ค๋ฌด๋ฅผ ์—ฐ๊ณ„ํ•œ ๋‹ค์–‘ํ•œ ๋ถ„์„ ๋ฐ ๋ชจ๋ธ๋ง์„ ์ˆ˜ํ–‰ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

  • ๐Ÿง  ๋จธ์‹ ๋Ÿฌ๋‹ ๋ฐ AI: ์‹ ๊ฒฝ๋ง, ๋žœ๋ค ํฌ๋ ˆ์ŠคํŠธ, ๋”ฅ๋Ÿฌ๋‹(DNN), t-SNE, ๊ฐ•ํ™”ํ•™์Šต ๋“ฑ
  • ๐ŸŒ ๋น…๋ฐ์ดํ„ฐ ๋ฐ GeoAI: ๋ฐ์ดํ„ฐ ์œตํ•ฉ, ๊ณต๊ฐ„์ •๋ณด ๋ถ„์„, ์‹œ๊ณต๊ฐ„ ๋ชจ๋ธ๋ง, GeoAI, ์˜ˆ์ธก ๋“ฑ
  • ๐Ÿ—บ๏ธ GIS ๋ฐ ๊ณต๊ฐ„๋ถ„์„: QGIS, Mapbox, Leaflet, Folium, PostgreSQL/PostGIS ๋“ฑ ๋„๊ตฌ ํ™œ์šฉ
  • ๐Ÿšฆ ๊ตํ†ต ์‹œ์Šคํ…œ ๋ชจ๋ธ๋ง: VISSIM(COM/API), EMME/2, TransCAD, DynusT, Naturalistic Driving Study (NDS) ๋ถ„์„
  • ๐Ÿ“Š ๋ฐ์ดํ„ฐ ์‹œ๊ฐํ™” ๋ฐ ๋ถ„์„ ๋„๊ตฌ: Python, R, MATLAB, VBA, Jupyter, HTML, ๋Œ€์‹œ๋ณด๋“œ(R Shiny) ๋ฐ ์›น ๊ธฐ๋ฐ˜ ์‹œ๊ฐํ™”


๐Ÿ“˜ Recent Focus

My current work explores real-world applications of data science and GeoAI for smarter infrastructure, sustainable mobility, and public policy innovation.

  • ๐Ÿ” Data-Driven Social Science & Policy Support: Integrating machine learning with government data for issue monitoring and decision-making
  • ๐Ÿš— Autonomous & Connected Mobility Systems: Modeling intersections, travel behavior, and safety scenarios using large-scale simulations
  • ๐Ÿงญ GeoAI & Spatio-Temporal Modeling: Applying AI to geospatial data for insights on urban dynamics, land use, and accessibility
  • ๐Ÿงฉ Cross-Domain Collaboration: Bridging transportation, computer science, GIS, and public administration
  • ๐ŸŒ Interactive Visualization: Creating storytelling tools using maps, dashboards, and data platforms for citizen and expert engagement
[๐Ÿ‡ฐ๐Ÿ‡ท ํ•œ๊ธ€ ํ•œ๊ธ€ ์†Œ๊ฐœ ๋ณด๊ธฐ]

์ตœ๊ทผ์—๋Š” ๋ฐ์ดํ„ฐ ์‚ฌ์ด์–ธ์Šค ๋ฐ GeoAI ๊ธฐ๋ฐ˜ ๊ธฐ์ˆ ์„ ํ†ตํ•ด ์Šค๋งˆํŠธ ์ธํ”„๋ผ ๊ตฌ์ถ•, ์ง€์†๊ฐ€๋Šฅํ•œ ๋ชจ๋นŒ๋ฆฌํ‹ฐ, ๊ณต๊ณต์ •์ฑ… ํ˜์‹ ์„ ์œ„ํ•œ ๋‹ค์–‘ํ•œ ์—ฐ๊ตฌ๋ฅผ ์ง„ํ–‰ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

  • ๐Ÿ” ๋ฐ์ดํ„ฐ ๊ธฐ๋ฐ˜ ์‚ฌํšŒ๊ณผํ•™ ๋ฐ ์ •์ฑ… ์ง€์›: ๋จธ์‹ ๋Ÿฌ๋‹ ๊ธฐ๋ฐ˜์˜ ๋ฏผ์› ๋ถ„์„, ์ •์ฑ… ์ด์Šˆ ๋ชจ๋‹ˆํ„ฐ๋ง, ๋ฏผ์› ๋“ฑ ํ–‰์ • ๋ฐ์ดํ„ฐ ํ†ตํ•ฉ ํ™œ์šฉ
  • ๐Ÿš— ์ž์œจ์ฃผํ–‰ ๋ฐ ์ปค๋„ฅํ‹ฐ๋“œ ๋ชจ๋นŒ๋ฆฌํ‹ฐ ์‹œ์Šคํ…œ: ๋Œ€๊ทœ๋ชจ ์‹œ๋ฎฌ๋ ˆ์ด์…˜์„ ํ†ตํ•œ ๊ต์ฐจ๋กœ ๋ชจ๋ธ๋ง, ์ฃผํ–‰ ํ–‰ํƒœ ๋ถ„์„, ์‹œ๋‚˜๋ฆฌ์˜ค ๊ฐœ๋ฐœ
  • ๐Ÿงญ GeoAI ๋ฐ ์‹œ๊ณต๊ฐ„ ๋ชจ๋ธ๋ง: ๋„์‹œ ๋™ํƒœ, ํ† ์ง€์ด์šฉ, ์ ‘๊ทผ์„ฑ ๋ถ„์„์„ ์œ„ํ•œ ๊ณต๊ฐ„์ •๋ณด ๊ธฐ๋ฐ˜ AI ๋ถ„์„
  • ๐Ÿงฉ ํ•™์ œ ๊ฐ„ ์œตํ•ฉ ์—ฐ๊ตฌ: ๊ตํ†ต, ์ปดํ“จํ„ฐ๊ณตํ•™, ๊ณต๊ฐ„์ •๋ณด, ํ–‰์ • ๋ถ„์•ผ์˜ ํ˜‘๋ ฅ ์—ฐ๊ตฌ ์ถ”์ง„
  • ๐ŸŒ ์ธํ„ฐ๋ž™ํ‹ฐ๋ธŒ ์‹œ๊ฐํ™”: ์ง€๋„, ๋Œ€์‹œ๋ณด๋“œ, ๋ฐ์ดํ„ฐ ํ”Œ๋žซํผ ๋“ฑ์„ ํ™œ์šฉํ•œ ์‹œ๊ฐํ™”


๐Ÿ“ซ You are welcome to explore my repositories and reach out! ๐Ÿ˜Š