David Seunghyun Yoon
Research Scientist

PhD Candidate
Dept. of Electrical & Computer Engineering
Seoul National Unviersity

[CV]  [Google Scholar]  [GitHub]  [LinkedIn]

I'm a Ph.D. candidate at Machine Intelligence Lab. at Seoul National University. I am advised by Prof. Kyomin Jung at Dept. of Electrical and Computer Engineering. Before coming to SNU, I was a senior software engineer at Samsung artificial intelligence (AI) research center.

My research interests are in the areas of machine learning and natural language processing (NLP). In particular, I am interested in the question-answering system and emotional dialogue model.

Keywords: NLP, Machine Learning, Artificial Intelligence


Academic Activities

  • Teaching Assistant:
    Programming Methodology, Seoul Nat’l Univ., Spring 2018
    Lab. Sentiment Analysis, BigCamp (Big Data Academy), Big Data Institute, 2016-2018
    Topics in Computer and VLSI (Machine Learning), Seoul Nat’l Univ., Fall 2015

  • Invited Talks:
    Research in Natural Language Processing, NVIDIA AI Conference, Jul. 2019
    QA-pair ranking algorithm and its applications, Naver, Aug. 2018
    Advancement of the Neural Dialogue Model, Fast campus, Jul. 2018

  • Service:
    Program Committee of NAACL-19, EMNLP-19, INTERSPEECH-19, AAAI-20

Professional Experiences

  • Research Scientist Intern: Adobe Research (San Jose, CA, US), 2018
  • Senior Engineer: Samsung AI Research Center (Seoul, KR), 2006-2017
  • Representative of employees: Samsung, 2012-2014
  • Trainer of Global New Employee Course: Samsung, 2011


  1. A Compare-Aggregate Model with Latent Clustering for Answer Selection [paper]
    (oral presentation, accpetance rate: 21.2%)
    S Yoon, F Dernoncourt, DS Kim, T Bui, K Jung
    CIKM 2019
  2. Surf at MEDIQA 2019: Improving Performance of Natural Language Inference in the Clinical Domain by Adopting Pre-trained Language Model [paper]
    J Nam, S Yoon, K Jung
    ACL 2019 (Workshop)
  3. Speech Emotion Recognition Using Multi-hop Attention Mechanism [paper] [slide]
    (oral presentation)
    S Yoon, S Byun, S Dey, K Jung
    IEEE ICASSP 2019
  4. Neural Networks for Compressing and Classifying Speaker-Independent Paralinguistic Signals [paper]
    S Byun, S Yoon, K Jung
    IEEE BigComp 2019
  5. Detecting Incongruity Between News Headline and Body Text via a Deep Hierarchical Encoder [paper] [code] [slide] [poster]
    (oral presentation, accpetance rate: 16.2%)
    S Yoon, K Park, J Shin, H Lim, S Won, M Cha, K Jung
    AAAI 2019
  6. Multimodal Speech Emotion Recognition using Audio and Text [paper] [code] [poster]
    S Yoon, S Byun, K Jung
    IEEE SLT 2018
  7. Comparative Studies of Detecting Abusive Language on Twitter [paper] [code]  
    Y Lee*, S Yoon*, K Jung
    EMNLP 2018 (Workshop)
  8. Learning to Rank Question-Answer Pairs using Hierarchical Recurrent Encoder with Latent Topic Clustering [paper] [code] [poster] [video_kor]
    (acceptance rate: 31%)
    S Yoon, J Shin, K Jung
    NAACL HLT 2018
  9. Contextual-CNN: A Novel Architecture Capturing Unified Meaning for Sentence Classification [paper]
    J Shin, Y Kim, S Yoon, K Jung
    IEEE BigComp 2018
  10. Synonym Discovery with Etymology-based Word Embeddings [paper]
    S Yoon, P Estrada, K Jung
    IEEE SSCI 2017
  11. Efficient Transfer Learning Schemes for Personalized Language Modeling using Recurrent Neural Network [paper]
    S Yoon, H Yun, Y Kim, G Park, K Jung
    AAAI 2017 (Workshop)
  12. Automatic Question Answering System for Consumer Product [paper]
    S Yoon, M Sundar, A Gupta, K Jung
    IntelliSys 2016
  13. Mining the Minds of Customers from Online Chat Logs [paper]
    (accpetance rate: 21%)
    K Park, J Kim, J Park, M Cha, J Nam, S Yoon, E Rhim
    CIKM 2015
  14. Domain Question Answering System
    S Yoon, E Rhim, D Kim
    KIISE Transactions on Computing Practices 2015
  15. Media clips: Implementation of an intuitive media linker [paper]
    S Yoon, K Lee, H Shin
    IEEE BMSB 2011


[ International Patents ]

  1. [issued] Method of recommending application, mobile terminal using the method, and communication system using the method [link]
    J Nam, M Lee, M Koo, S Yoon
    US 9,247,376, Jan. 26, 2016  
  2. [issuedMethod and apparatus for displaying photo on screen having any shape [link]
    S Yoon, M Lee
    US 9,049,383, Jun. 2, 2015  
  3. [issuedMethod and apparatus for providing information and computer readable storage medium having a program recorded thereon for executing the method [link]
    S Yoon, M Lee, M Koo, J Nam
    US 8,958,824, Feb. 17, 2015  
  4. [issued] Method and apparatus for fast tracking position by using global positioning system [link]
    S Yoon, S Kim
    US 8,094,070, Jan. 10, 2012  
  5. Device and method for analyzing user emotion
    E Rhim, J Kim, J Nam, S Yoon, K Park, J Park, M Cha
    PCT/KR1020160058782, May. 13, 2016
  6. User terminal device, information providing system, and method for providing information [link]
    Y Won, S Yoon, O Kwon, M Kim, H Oh, S Lee, S Cha
    US 14/511,506, EP20140185800, Oct. 10, 2014
  7. Terminal apparatus, server and method of controlling the same [link]
    Y Kim, O Kwon, S Kim, H Oh, S Yoon, S Cha, J Lee
    US 14/250,081, CN 201410085759, EP20140154718, Apr. 10, 2014
  8. Apparatus and method for searching with consideration user's action [link]
    S Yoon, M Lee, M Koo, J Nam
    US 13/631,353, Sep. 28, 2012
  9. Apparatus and method for clipping and sharing content at a portable terminal [link]
    S Yoon, M Lee, M Koo, J Nam
    US 13/629,394, CN 201280047213, EP20120837007, PCT/KR1020110097578, Sep. 27, 2012
  10. Apparatus and method for correcting position information of portable terminal in multi-path zone [link]
    S Yoon
    US 13/604,528, Sep. 5, 2012
  11. Method and apparatus for connecting devices [link]
    K Kim, J Lee, W Park, H Shim, Y Park, M Lee, M Koo, S Yoon, J Nam
    US 13/452,766, EP20120162473, PCT/KR1020110037351 , Apr. 20, 2012
  12. Method and apparatus for crawling webpages [link]
    S Yoon, S Maeng, J Huh, S Seo, J Kim, J Park
    US 13/116,785, May. 26, 2011

[ Korean Patents ]

  1. [issuedApparatus and method for collecting information of destination in portable terminal
    S Yoon, J Nam, M Koo, M Lee
    KR 1019146320000, Oct. 29, 2018
  2. [issuedMethod and apparatus for providing information, and computer readable storage medium
    S Yoon, M Lee, M Koo, J Nam
    KR 1017731670000, Aug. 24, 2017  
  3. [issued] Method for recommendation of application, mobile terminal thereof and communication system thereof
    J Nam, M Lee, M Koo, S Yoon
    KR 1017473030000, Jun. 8, 2017  
  4. [issued] Method and apparatus for fast positioning using global positioning system
    S Yoon, S Kim
    KR 1015649380000, Oct. 27, 2015  
  5. Artificial intelligence based dialog system and response control method thereof
    K Jung, S Yoon, J Shin, H Kwak, S Byun
    KR 1020170158345, Nov. 24, 2017
  6. Method and apparatus for changing personal information
    S Yoon, S Lee, O Kwon, M Kim, H Oh, Y Won, S Cha
    KR 1020130122222, Oct. 14, 2013
  7. Apparatus and method for setting manner mode in portable terminal
    J Nam, M Lee, M Koo, S Yoon
    KR 1020110113927, Nov. 3, 2011