Hello, I'm Jinu Choi, Researcher.
Building accessible systems that bring real change to people's lives. HCI Researcher at Letsur.
Interested in trying any of these? Contact me to get access.
Building accessible systems that matter
Hi, I'm Jinu Choi, an HCI Researcher at Letsur. I'm deeply interested in system design, particularly mobile computing and user interfaces.
Previously, I researched human-in-the-loop accessibility systems for visually impaired users at KAIST NCLab.
I dive deep into new problems and prefer learning new technologies for research rather than relying on existing ones. I love bringing real change to people's lives through my work.
2025.04 ~ Present
2022.09 ~ 2024.08
2017.03 ~ 2022.08
Things I'm thinking about
Sharing thoughts on technology, design, and the future. Hoping these ideas will evolve into projects someday.
AI Agent Memory System
Instead of storing answers, store functions. Extract knowledge inductively from conversations— preserving context like who, when, and under what conditions. Rule-based reasoning over value-based retrieval.
02Spark System
Capture fleeting ideas in 2 seconds, auto-link to existing notes, and build meta-cognition over time. Making Claude an AI that truly knows me through thought pattern analysis.
03Private Music Archive
A private SoundCloud for music clubs—stream, search by lyrics or credits, visualize collaboration networks. Digitize years of CDs gathering dust into a searchable archive.
04AI Crystallizer
Just talk naturally—the AI gradually understands you in the background. It collects your scattered utterances, crystallizes implicit thoughts you can't quite articulate, and proactively connects ideas across domains.
05N-Split
Graph-algorithm-powered group expense settler that minimizes the number of transfers using Minimum Cash Flow and Cycle Detection. Native Korean payment integration for one-click settlement.
06Agora
Multiple LLMs take org-chart personas—CTO, designer, junior dev—and hold structured debates on real decisions. Applies Jury Learning to intentionally surface minority opinions that majority voting would silence.
07Dream Pipeline
Inspired by REM sleep—an offline batch pipeline that consolidates AI memories. Discovers cross-memory patterns, creates implicit links between unrelated knowledge, and compresses old details into higher-level abstractions.
08AI Memory Pipeline Principles
An anti-complexity, schema-first design philosophy for AI agent memory. Three-stage Write–Index–Read pipeline where schema quality and query decomposition beat complex retrieval algorithms every time.
09Typed Memory System
Memory nodes typed into Knowledge, Person, and Event with distinct schemas. Events act as ambient context injected into every query automatically. An Alias Registry expands domain jargon transparently at search time.
10CPS Agent Architecture
Dual-channel pattern for enterprise AI agents: Expert Channel treats humans as "slow tools" via A2H protocol, User Channel handles Q&A. A Messenger Layer absorbs multi-turn and multi-channel complexity.
Projects
Chaperone
A privacy-preserving system for visually impaired users receiving remote assistance. Modified AOSP to filter sensitive information at the framework level before sharing with helpers.
Hivemind Field Trial
Field trial research on instant social control of shared devices in public spaces. Deployed in classrooms and cafeterias to analyze user behavior. Published in IMWUT.
Sidekick AI
A context-aware system that monitors driver status during voice chatbot conversations. Uses T Map SDK to predict road conditions and pauses conversations in high-attention zones.
ButtonTap
Wearable interaction using shirt buttons with embedded microphones to classify object contact sounds. Achieved high accuracy object recognition using SVM-based algorithms.
AR/VR Vocational Training
AR/VR application for students with developmental disabilities to practice car-sharing vehicle inspection. Developed tablet AR and Oculus VR simultaneously using Unity and AR Foundation.
Writing
AI, 제품, 그리고 생각의 구조에 대한 글.