https://jungbaepark.github.io/blog/Recent content on Jungbae ParkHugo -- 0.152.2en-usThu, 15 Jan 2026 00:00:00 +0000https://jungbaepark.github.io/blog/projects/agentic-3d-model-search/Thu, 15 Jan 2026 00:00:00 +0000https://jungbaepark.github.io/blog/projects/agentic-3d-model-search/Building an agentic multimodal search system (CoI-Fit) for 3D product retrieval at Bucketplace, combining LLM reasoning with BM25+KNN hybrid search across visual, textual, and spatial signals via LangGraph and A2A protocol.https://jungbaepark.github.io/blog/projects/digital-twin-scene-retrieval/Thu, 01 Jan 2026 00:00:00 +0000https://jungbaepark.github.io/blog/projects/digital-twin-scene-retrieval/Built an end-to-end scene-to-products retrieval pipeline for Digital Twin at Bucketplace, achieving 13x recall improvement, 6,000x cost reduction in 3D collaboration, and scaling the catalog from 30K to 400K+ products.https://jungbaepark.github.io/blog/projects/ohouseai-genai-workflow/Sat, 15 Nov 2025 00:00:00 +0000https://jungbaepark.github.io/blog/projects/ohouseai-genai-workflow/Led systematization of OHouseAI’s GenAI interior design service at Bucketplace, achieving +253% net satisfaction, 2x latency reduction, and outperforming GPT-IMAGE-1.5 and Gemini Nano. Reached Korea #8 in Graphics/Design.https://jungbaepark.github.io/blog/projects/multimodal-retrieval-vlm/Sun, 15 Jun 2025 00:00:00 +0000https://jungbaepark.github.io/blog/projects/multimodal-retrieval-vlm/Developed personalized multimodal retrieval combining SASRec sequential recommendation with Jina-CLIP-V2 vision-language representations, using knowledge distillation for efficient production serving at Bucketplace.https://jungbaepark.github.io/blog/projects/search-okr-ecommerce/Sun, 15 Jun 2025 00:00:00 +0000https://jungbaepark.github.io/blog/projects/search-okr-ecommerce/Delivered measurable search ranking OKR impact at Bucketplace through 4 production A/B experiments (3 winners shipped), achieving +11.17% buyer conversion on category pages and +7.35% deals exposure on store search.https://jungbaepark.github.io/blog/projects/mohper-automl-ecommerce/Wed, 15 Jan 2025 00:00:00 +0000https://jungbaepark.github.io/blog/projects/mohper-automl-ecommerce/Built a multi-objective hyperparameter optimization framework for e-commerce search at Bucketplace, launching tuned parameters 5x+ on SERP and 3x+ on CPLP for CTR/CVR gains. Accepted to CIKM'25 Applied Research Track.https://jungbaepark.github.io/blog/projects/global-content-search-ranking/Fri, 15 Sep 2023 00:00:00 +0000https://jungbaepark.github.io/blog/projects/global-content-search-ranking/Built a two-stage content ranking system at Bucketplace covering 3 content types, with ElasticSearch function-score reranking, time decay, global language analysis, and Redis-cached serving.https://jungbaepark.github.io/blog/projects/clip-ecommerce-multimodal/Thu, 15 Jun 2023 00:00:00 +0000https://jungbaepark.github.io/blog/projects/clip-ecommerce-multimodal/Shipped CLIP-based multimodal retrieval at Bucketplace, achieving +16.39% query CTCVR, 2x inference speed via quantization, and 92.23% Top-10 accuracy across 2,000+ product categories.https://jungbaepark.github.io/blog/projects/shared-team-ml-mart/Thu, 01 Jun 2023 00:00:00 +0000https://jungbaepark.github.io/blog/projects/shared-team-ml-mart/Designed a shared ML feature mart for Bucketplace Search Team with client-side log validation, lag anomaly detection, and automated A/B test analysis pipeline using PySpark and HiveDB.https://jungbaepark.github.io/blog/projects/speech-scoring-interspeech/Sun, 15 Jan 2023 00:00:00 +0000https://jungbaepark.github.io/blog/projects/speech-scoring-interspeech/Developed a prompt-aware automatic speech scoring system at RIIID that solves the cold-start item problem using BERT/CLIP prompt embeddings. Published at InterSpeech 2023 and deployed to SANTA Say TOEIC Speaking app.https://jungbaepark.github.io/blog/projects/knowledge-tracing-contrastive/Sat, 15 Oct 2022 00:00:00 +0000https://jungbaepark.github.io/blog/projects/knowledge-tracing-contrastive/Proposed ACCL and RCL contrastive learning methods at RIIID, achieving state-of-the-art on student modeling across 6 benchmarks (dropout prediction, knowledge tracing). Deployed to Santa TOEIC platform.https://jungbaepark.github.io/blog/projects/ml-infrastructure-riiid/Wed, 15 Sep 2021 00:00:00 +0000https://jungbaepark.github.io/blog/projects/ml-infrastructure-riiid/Built ML model registry (MLFlow) and dataset pipelines (Airflow, Athena, BigQuery) at RIIID, serving 4+ products including SANTA TOEIC, IVYGlobal SAT, CASA GRANDE, and INICIE.https://jungbaepark.github.io/blog/projects/ml-pipeline-acceleration/Tue, 15 Dec 2020 00:00:00 +0000https://jungbaepark.github.io/blog/projects/ml-pipeline-acceleration/Introduced RIIID’s first multi-GPU training, boosting GPU utilization from 25% to 95% and cutting initialization time from 1 hour to 10 seconds. Built CI/CD pipelines with GitHub Actions.https://jungbaepark.github.io/blog/projects/emotional-tts-humelo/Fri, 15 May 2020 00:00:00 +0000https://jungbaepark.github.io/blog/projects/emotional-tts-humelo/Led development of duration-controllable TTS and emotional voice conversion at Humelo, producing two ICASSP publications (2019 Oral 1st author, 2020). Won Minister of Science and ICT Special Award at K-Startup 2018.https://jungbaepark.github.io/blog/projects/government-rd-grants/Sun, 15 Mar 2020 00:00:00 +0000https://jungbaepark.github.io/blog/projects/government-rd-grants/Secured ~US$875K across three competitive Korean government R&D grants (IITP, TIPS, Seoul R&BD) at Humelo, covering brain-inspired AI, emotional TTS, and voice conversion research.https://jungbaepark.github.io/blog/projects/sound-event-detection-transfer-learning/Mon, 15 Apr 2019 00:00:00 +0000https://jungbaepark.github.io/blog/projects/sound-event-detection-transfer-learning/Developed convolutional bidirectional LSTM with synthetic data-based transfer learning for polyphonic sound event detection at Humelo, achieving +28.4% F1 improvement. Published at ICASSP 2019 as corresponding author.https://jungbaepark.github.io/blog/projects/ai-music-composition-sxsw/Fri, 15 Mar 2019 00:00:00 +0000https://jungbaepark.github.io/blog/projects/ai-music-composition-sxsw/Led AI music composition and rap synthesis at Humelo, presented at SXSW 2019, collaborated with SM Entertainment and rapper Sleepy (KBS Documentary), and received coverage from 10+ national media outlets.https://jungbaepark.github.io/blog/projects/speech-emotion-recognition/Fri, 01 Feb 2019 00:00:00 +0000https://jungbaepark.github.io/blog/projects/speech-emotion-recognition/Built a multi-class speech emotion recognition system at Humelo using SpeechCNN and CRNN architectures with MFCC/Mel-spectrogram features, integrated into the Emotional TTS pipeline.https://jungbaepark.github.io/blog/projects/attentional-control-timeseries/Fri, 15 Feb 2019 00:00:00 +0000https://jungbaepark.github.io/blog/projects/attentional-control-timeseries/Master’s thesis at KAIST on attentional control for time-series classification and synthesis, solving the memory-based vs. memoryless trade-off for EEG signals. Oral presentation at IEEE SMC 2018.https://jungbaepark.github.io/blog/projects/multi-agent-reinforcement-learning/Tue, 15 Nov 2016 00:00:00 +0000https://jungbaepark.github.io/blog/projects/multi-agent-reinforcement-learning/Undergraduate research at KAIST on multi-agent cognitive policy learning through competitive reinforcement learning, demonstrating emergence of complex behaviors. Won Best Paper Award at 2016 KIIS Conference.