Commentary
Human Resource Development Based on Win-Win-Win Industry-Academia Collaboration ……………………………………… Kouzou Ohara 281
Special Issue:“Recommender Systems”
Editor’s Introduction to“ Recommender Systems” …………………………………………………………………………………… Kenta Oku 282
News Recommendation System Overview and Problem ……………………………………………………………………………Yoshifumi Seki 283
Item Recommender System
─ Use Cases of Recommender Systems in E-Commerce Service ─ ……………………………………… Yu Hirate, Li Tianyu and Le Phuc 292
Music Recommender System
─ Playlist, Context, and Interaction ─ …………………………………………………………………………………………… Kenta Oku 300
Recommender Systems for Tourist Information ……………………………………………………………………………… Daisuke Kitayama 309
Recipe Recommender System …………………………………………………………………………… Shinsuke Nakajima and Mayumi Ueda 317
Special Issue:“Materials Informatics”
Editors ’ Introduction to“ Materials Informatics” …………………… Ryota Kobayashi, Mutsumi Kimura, Youichiro Miyake and Ryutaro Ichise 324
Overview of Materials Informatics in Japan …………………………………………………………………………………………… Satoshi Itoh 325
Persistent Homology and Structural Analysis in Materials Science ………………………… Yasuaki Hiraoka, Ippei Obayashi and Kazuto Akagi 330
Material Development by Interpretable Machine Learning ……………………Yuma Iwasaki, Ryohto Sawada, Ryota Higa and Masahiko Ishida 339
Interface Structure Determination and Spectrum Analysis Using Machine Learning …………………… Shin Kiyohara and Teruyasu Mizoguchi 345
Achievements and Challenges of Materials Informatics in Chemistry ………………………………………………………………Miho Hatanaka 351
Molecular Design in Chemical Industry …………………………………………………………………… Tetsu Isomura and Hiroshi Yamashita 358
Application of Materials Informatics to Inorganic Compounds ……………………………………………………………………Koji Morikawa 364
Lecture Series:“The Current State of Artificial Intelligence”（2）
Fundamentals and Development of Problem Solving, Search and Optimization …………………………………… Katsumi Nitta and Isao Ono 370
Article
Experiencing AI in“ Detroit: Become Human” ……………………………………………………………………………… Youichiro Miyake 381
Series:“AI for the Liberal Arts”（1）
What’s AI ? ……………………………………………………………………………………… Sho Sakurai, Toshinori Sato and Ryutaro Ichise 385
Special Interest Group Report
Report on the First Knowledge Graph Reasoning Challenge 2018
─ Toward the Explainable AI System ─ …… Takahiro Kawamura, Shusaku Egami, Koutarou Tamura, Yasunori Hokazono, Takanori Ugai, 396
Yusuke Koyanagi, Fumihito Nishino, Seiji Okajima, Katsuhiko Murakami, Kunihiko Takamatsu,
Aoi Sugiura, Shun Shiramatsu, Xiangyu Zhang and Kouji Kozaki
JSAI International Symposia on AI 2018 ………………………………………………………………… Kazuhiro Kojima and Maki Sakamoto 413
My Bookmark
Cognitive Bias and Heuristic: The Human Natures and Decision Science Research …………………………………………… Hidehito Honda 418
Global Eye（46）
Visiting Carnegie Mellon University as a Visiting Ph.D. Student ………………………………………………………… Shonosuke Ishiwatari 422
Students Forum（97）
Interview with Prof. Toshio Fukuda: Aims to“ Build a Robot That Blends Seamlessly into the Human World”
……………………………………………………………………………………………………………… Atom Sonoda and Yuki Kuroda 424
Conference Reports
The 33rd AAAI Conference on Artificial Intelligence（AAAI 2019） ……………………………………………………… Jun Ernesto Okumura 427
Book Review
Shunsuke Managi: Jinkou-chinou no Keizaigaku, 400pp., Minerva Publishing Co., Ltd.（2018） ………………………………Dohjin Miyamoto 429
Ken-ichi Fukui：Basics of Machine Learning by Practical Examples with Python, 148pp., Ohmsha, Ltd.（2018） ……………… Toshinori Sato 430
Article
Cover Comment:“ Materials Informatics” ……………………………………………………………… Miho Hatanaka and Youichiro Miyake 432