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ORCIDKeiichi Ochiai
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Journal Articles
- 2024
[j5]Hiroaki Tanaka
, Wataru Yamada, Keiichi Ochiai, Shoko Wakamiya, Eiji Aramaki:
Estimating work engagement from online chat tools. EPJ Data Sci. 13(1): 58 (2024)- [j4]Keiichi Ochiai, Masayuki Terada, Makoto Hanashima, Hiroaki Sano, Yuichiro Usuda:
Detection of Non-Designated Evacuation Shelters from Real-Time Population Dynamics Using Autoencoder-Based Anomaly Detection. ACM Trans. Spatial Algorithms Syst. 10(3): 29:1-29:23 (2024) - 2023
- [j3]Hisao Katsumi, Wataru Yamada, Keiichi Ochiai:
Characterizing Generic POI: A Novel Approach for Discovering Tourist Attractions. J. Inf. Process. 31: 265-277 (2023) - 2022
- [j2]Kohsuke Kubota, Hiroyuki Sato, Wataru Yamada, Keiichi Ochiai, Hiroshi Kawakami:
Content-based Stock Recommendation Using Smartphone Data. J. Inf. Process. 30: 361-371 (2022) - 2020
- [j1]Yusuke Fukazawa, Naoki Yamamoto, Takashi Hamatani, Keiichi Ochiai, Akira Uchiyama, Ken Ohta:
Smartphone-based Mental State Estimation: A Survey from a Machine Learning Perspective. J. Inf. Process. 28: 16-30 (2020)
Conference and Workshop Papers
- 2024
- [c33]Keiichi Ochiai, Masayuki Terada:
Poster: End-to-End Privacy-Preserving Vertical Federated Learning using Private Cross-Organizational Data Collaboration. CCS 2024: 4955-4957 - [c32]Meisaku Suzuki, Yusuke Fukushima, Ryo Koyama, Hayato Kumagai, Tomohiro Mimura, Keiichi Ochiai:
Cross-city-aware Spatiotemporal BERT. HuMob-Challenge@SIGSPATIAL 2024: 33-36 - [c31]Takuya Kitade, Wataru Yamada, Keiichi Ochiai, Michita Imai:
Bicode: A Hybrid Blinking Marker System for Event Cameras. ICRA 2024: 2939-2945 - 2023
- [c30]Keiichi Ochiai, Masayuki Terada, Hiroaki Sano, Makoto Hanashima, Yuichiro Usuda:
Anomaly Detection for Population Dynamics using Autoencoder Leveraging Periodic Residual Component in Disaster Situations. GeoAI@SIGSPATIAL 2023: 34-42 - [c29]Eiji Kumakawa, Wataru Yamada, Keiichi Ochiai:
BaroDepth: A Method of Estimating Depth with Barometric Pressure Sensors in Smartphones. UbiComp/ISWC Adjunct 2023: 54-57 - [c28]Hisao Katsumi, Kohsuke Kubota, Wataru Yamada, Keiichi Ochiai:
Stay Ahead of the Competition: An Approach for Churn Prediction by Leveraging Competitive Service App Usage Logs. UbiComp/ISWC Adjunct 2023: 73-77 - 2022
- [c27]Keiichi Ochiai, Hiroyuki Sato, Hiroshi Kawakami, Takahiro Ide, Toru Otaki, Akira Yamada, Tatsuya Yano, Hiroki Okawa, Takuya Shirai, Yutaka Arakawa:
Encouraging Crowd Avoidance Behavior using Dynamic Pricing Framework Towards Preventing the Spread of COVID-19. IEEE Big Data 2022: 1661-1670 - [c26]Hiroaki Tanaka, Yuuma Jitsunari, Wataru Yamada, Keiichi Ochiai, Shoko Wakamiya, Eiji Aramaki:
Graph Neural Network Tells Us Who is the Communication Enhancer. IEEE Big Data 2022: 4035-4039 - [c25]Wataru Yamada, Sawa Korogi, Keiichi Ochiai:
Janus Screen: Screen with Switchable Projection Surfaces Using Wire Grid Polarizer. CHI 2022: 259:1-259:12 - [c24]Keiichi Ochiai, Masayuki Terada, Makoto Hanashima, Hiroaki Sano, Yuichiro Usuda:
Detection of non-designated shelters by extracting population concentrated areas after a disaster (industrial paper). SIGSPATIAL/GIS 2022: 50:1-50:9 - [c23]Masayasu Sumiya, Wataru Yamada, Keiichi Ochiai:
Anywhere Hoop: Virtual Free Throw Training System. UIST (Adjunct Volume) 2022: 65:1-65:3 - [c22]Mariko Chiba, Wataru Yamada, Keiichi Ochiai:
Shadowed Speech: an Audio Feedback System which Slows Down Speech Rate. UIST (Adjunct Volume) 2022: 66:1-66:3 - 2021
- [c21]Hiroaki Tanaka, Wataru Yamada, Keiichi Ochiai:
Estimating Work Engagement from Online Chat Logs. AsianCHI@CHI 2021: 70-73 - [c20]Keiichi Ochiai, Hiroto Akatsuka, Wataru Yamada, Masayuki Terada:
Disaster Damage Estimation from Real-time Population Dynamics using Graph Convolutional Network (Industrial Paper). SIGSPATIAL/GIS 2021: 336-345 - [c19]Eiji Kumakawa, Wataru Yamada, Keiichi Ochiai, Yusuke Fukazawa, Mizuki Shirai, Hirokazu Masuda:
Estimating Patient Independence with Sleep Sensors. UbiComp/ISWC Adjunct 2021: 44-45 - [c18]Keiichi Ochiai, Takuya Chida, Keita Yokoyama, Daisuke Koizumi, Hiroaki Tanaka, Akihiro Kawana:
Memory Efficient Adversarial Attacks on Graphs: A Winning Solution for KDD Cup 2020. ICMU 2021: 1-6 - 2020
- [c17]Hisao Katsumi, Wataru Yamada, Keiichi Ochiai:
Generic POI recommendation. UbiComp/ISWC Adjunct 2020: 46-49 - [c16]Keiichi Ochiai, Yusuke Fukazawa, Wataru Yamada, Hiroyuki Manabe, Yutaka Matsuo:
Gravity of Location-Based Service: Analyzing the Effects for Mobility Pattern and Location Prediction. ICWSM 2020: 476-487 - [c15]Taku Ito, Keiichi Ochiai, Yusuke Fukazawa:
C-LIME: A Consistency-Oriented LIME for Time-Series Health-Risk Predictions. PKAW 2020: 58-69 - 2019
- [c14]Keiichi Ochiai, Naoki Yamamoto, Takashi Hamatani, Yusuke Fukazawa, Takayasu Yamaguchi:
Exploiting Graph Convolutional Networks for Representation Learning of Mobile App Usage. IEEE BigData 2019: 5379-5383 - [c13]Takashi Hamatani, Keiichi Ochiai, Akiya Inagaki, Naoki Yamamoto, Yusuke Fukazawa, Masatoshi Kimoto, Kazuki Kiriu, Kouhei Kaminishi, Jun Ota, Yuri Terasawa, Tsukasa Okimura, Takaki Maeda:
Automated inference of cognitive performance by fusing multimodal information acquired by smartphone. UbiComp/ISWC Adjunct 2019: 921-928 - [c12]Keiichi Ochiai, Kohei Senkawa, Naoki Yamamoto, Yuya Tanaka, Yusuke Fukazawa:
Real-time On-Device Troubleshooting Recommendation for Smartphones. KDD 2019: 2783-2791 - [c11]Keiichi Ochiai, Fatina Putri, Yusuke Fukazawa:
Local App Classification using Deep Neural Network based on Mobile App Market Data. PerCom 2019: 186-191 - 2018
- [c10]Keiichi Ochiai, Naoki Yamamoto, Takashi Hamatani, Yusuke Fukazawa, Masatoshi Kimoto, Kazuki Kiriu, Kouhei Kaminishi, Jun Ota, Yuri Terasawa, Tsukasa Okimura, Takaki Maeda:
Analyzing the Relationship between Cognitive Performance and Time to Find Intended Mobile App. UbiComp/ISWC Adjunct 2018: 1686-1690 - [c9]Naoki Yamamoto, Keiichi Ochiai, Akiya Inagaki, Yusuke Fukazawa, Masatoshi Kimoto, Kazuki Kiriu, Kouhei Kaminishi, Jun Ota, Tsukasa Okimura, Yuri Terasawa, Takaki Maeda:
Physiological Stress Level Estimation Based on Smartphone Logs. ICMU 2018: 1-6 - 2017
- [c8]Wataru Yamada, Hiroyuki Manabe, Hiroyuki Hakoda, Keiichi Ochiai, Daizo Ikeda:
CamTrackPoint: pointing stick for mobile device using rear camera. UbiComp/ISWC Adjunct 2017: 321-324 - [c7]Kazuki Kiriu, Keiichi Ochiai, Akiya Inagaki, Naoki Yamamoto, Yusuke Fukazawa, Masatoshi Kimoto, Tsukasa Okimura, Yuri Terasawa, Takaki Maeda, Jun Ota:
Recognizing whether a person is eating alone or has company by using wearable devices. ICMU 2017: 1-2 - 2016
- [c6]Wataru Yamada, Haruka Kikuchi, Keiichi Ochiai, Shu Takahashi, Yusuke Fukazawa, Hiroshi Inamura, Ken Ohta:
Multi-label categorizing local event information from micro-blogs. ICMU 2016: 1-6 - 2015
- [c5]Wataru Yamada, Daisuke Torii, Haruka Kikuchi, Hiroshi Inamura, Keiichi Ochiai, Ken Ohta:
Extracting local event information from micro-blogs for trip planning. ICMU 2015: 7-12 - 2009
- [c4]Keiichi Ochiai, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake:
Efficient acquisition of light transport based on separation of direct and global components. SIGGRAPH ASIA Posters 2009: 38:1 - 2008
- [c3]Keiichi Ochiai, Norimichi Tsumura, Toshiya Nakaguchi, Kimiyoshi Miyata, Yoichi Miyake:
Efficient acquisition and rendering of transparent and refractive objects using quotient image. Three-Dimensional Image Capture and Applications 2008: 680502 - 2007
- [c2]Takao Makino, Norimichi Tsumura, Koichi Takase, Ryusuke Honma, Keiichi Ochiai, Nobutoshi Ojima, Toshiya Nakaguchi, Yoichi Miyake:
Computational lighting reproduction for facial live video with rigid facial motion. SIGGRAPH Posters 2007: 172 - 2006
- [c1]Keiichi Ochiai, Norimichi Tsumura, Toshiya Nakaguchi, Kimiyoshi Miyata, Yoichi Miyake:
Gonio-spectral based digital archiving and reproduction system for electronic museum. SIGGRAPH Research Posters 2006: 97
Informal and Other Publications
- 2021
- [i1]Keiichi Ochiai, Tsukasa Demizu, Shin Ishiguro, Shohei Maruyama, Akihiro Kawana:
Simulating the Effects of Eco-Friendly Transportation Selections for Air Pollution Reduction. CoRR abs/2109.04831 (2021)
Coauthor Index
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