Hyeonseok Jeong WritingWriting about digital twin, data/API work, project retrospectives, and learning notes.https://log-ian.duckdns.org/Arriving Early Before Anyone Askedhttps://log-ian.duckdns.org/blog/arriving-early-before-anyone-asked/https://log-ian.duckdns.org/blog/arriving-early-before-anyone-asked/A personal note about learning a kids-cafe kitchen before my shift, becoming a manager, and discovering what responsibility feels like when the work is concrete.Mon, 13 Jul 2026 05:00:00 GMTHow I Write About Confidential Work Without Making It Emptyhttps://log-ian.duckdns.org/blog/confidential-project-writing/https://log-ian.duckdns.org/blog/confidential-project-writing/A working note on showing real technical contribution while protecting internal screens, data, partners, and project details.Mon, 13 Jul 2026 00:00:00 GMTHow I Split APIs for a Traffic Digital Twin Screenhttps://log-ian.duckdns.org/blog/digital-twin-api-boundary/https://log-ian.duckdns.org/blog/digital-twin-api-boundary/A working note on separating road loading, real-time traffic updates, and prediction requests between Flask and Unity.Mon, 13 Jul 2026 00:00:00 GMTReading AI Guidelines as a Systemhttps://log-ian.duckdns.org/blog/reading-ai-guidelines-as-a-system/https://log-ian.duckdns.org/blog/reading-ai-guidelines-as-a-system/A short work note on comparing public AI guidance materials and organizing them so proposal and project-document writers could find the right reference.Mon, 13 Jul 2026 02:00:00 GMTReturning to a Project With More Responsibilityhttps://log-ian.duckdns.org/blog/returning-to-a-project-with-more-responsibility/https://log-ian.duckdns.org/blog/returning-to-a-project-with-more-responsibility/A work story about leaving an inspection-software project, returning when the company asked for help, and taking responsibility for both development and coordination.Mon, 13 Jul 2026 04:00:00 GMTTeaching Java by Following the Requesthttps://log-ian.duckdns.org/blog/teaching-java-by-following-the-request/https://log-ian.duckdns.org/blog/teaching-java-by-following-the-request/A teaching note about answering Java questions, reviewing learner code, and using request and database flows to explain backend concepts.Mon, 13 Jul 2026 03:00:00 GMTWhy LINK_ID and Five-Minute Traffic Data Matterhttps://log-ian.duckdns.org/blog/traffic-link-id-note/https://log-ian.duckdns.org/blog/traffic-link-id-note/A working note on how one road key and one time unit made traffic data usable for training, APIs, and a Unity digital twin screen.Mon, 13 Jul 2026 00:00:00 GMT