Takeshi Ohkawa, Masaki Nakamura, Yuto Shiota, Takeshi Kuboki, Masahiro Aoyagi, "3D-LSI Emulation Chips for BUS Behavioral and Thermal Modeling," The 10th Taiwan and Japan Conference on Circuits and Systems (TJCAS 2024) (August 23-25, 2024), Poster presentation, 2024.
Takeshi Ohkawa, "Toward Model-driven Development of Hardware-Software Cooperative System for Robots and IoT Systems," Asia Pacific Conference on Robot IoT System Development and Platform 2023 (APRIS2023), Nov. 1-5, 2023, Tokyo, Japan, 2023. <<Invited Talk>>
Takeshi Ohkawa, Masahiro Aoyagi, "FPGA Emulation of Through-Silicon-Via (TSV) Dataflow Network for 3D Standard Chip Stacking System," IEEE Symposium on Low-Power and High-Speed Chips and Systems (COOL Chips 26), 3 pages, oral presentation, 2023.
Hayato Mori, Eisuke Okazaki, Gai Nagahashi, Mikiko Sato, Takeshi Ohkawa, Midori Sugaya, "Offloading Image Recognition Processing to FPGA Using Resource Manager for Multi-access Edge Computing," Proc. of Asia Pacific Conference on Robot IoT System Development and Platform 2023 (APRIS2023), Nov. 1-5, 2023, Tokyo, Japan, 2023. (6 pages, oral presentation)
Takeshi Ohkawa, Kenta Arai, Kanemitsu Ootsu, Takashi Yokota, "Alchemist: A Component-Oriented FPGA Development Tool Using Publish/Subscribe Model," 2024 IEEE International Conference on Consumer Electronics (ICCE) - SS11: FPGA and Related Applications for Consumer Electronics, 5-8 January 2024 | Las Vegas, NV, USA, 2024. (6 pages, oral presentation)
Hayato Mori, Eisuke Okazaki, Gai Nagahashi, Mikiko Sato, Takeshi Ohkawa, and Midori Sugaya, "Offloading Image Recognition Processing for Care Robots to FPGA on Multi-access Edge Computing," International Conference on Field Programmable Technology 2023 (FPT'23), Dec. 11-14, 2023, Yokohama, Japan, 2023. (Demo Night, 2 pages)
Ludi Wang, Takeshi Ohkawa, "AI-Based Keypoint Detection for Remote Robot Operation with Improved Safety," Proc. of Asia Pacific Conference on Robot IoT System Development and Platform 2023 (APRIS2023), Nov. 1-5, 2023, Tokyo, Japan, 2023. (2 pages, poster presentation)
Eisuke Okazaki, Hayato Mori, Gai Nagahashi, Mikiko Sato, Midori Sugaya, Takeshi Ohkawa, "Offloading Image Recognition Processing Using Heterogeneous FPGAs for Care Robot Applications," Proc. of Asia Pacific Conference on Robot IoT System Development and Platform 2023 (APRIS2023), Nov. 1-5, 2023, Tokyo, Japan, 2023. (2 pages, poster presentation)
Mikiko Sato, Gai Nagahashi, Eisuke Okazaki, Hayato Mori, Lee Yeonji, Takeshi Ohkawa, Yuji Sato, Midori Sugaya, "Sustainable Care Support System with Environmentally Adaptive Swarm Intelligence Robots," Proc. of Asia Pacific Conference on Robot IoT System Development and Platform 2023 (APRIS2023), Nov. 1-5, 2023, Tokyo, Japan, 2023. (2 pages, poster presentation)
Hiroki Hashimoto, Harumi Watanabe and Takeshi Ohkawa, “ROS-based Experimental Environment Towards Model-Driven Development with FPGA,” University Booth 23 @ DATE2021（Design, Automation and Test in Europe Conference2021), Feb. 4, 2021.
Chinatsu Yamamoto, Harumi Watanabe, Takeshi Ohkawa, Mikiko Sato, Ikuta Tanigawa, Kenji Hisazumi and Nobuhiko Ogura, "Layer Modeling and Its Code Generation based on Context-oriented Programming," In Proceedings of the 9th International Conference on Model-Driven Engineering and Software Development - Volume 1: MODELSWARD, ISBN 978-989-758-487-9, DOI: 10.5220/0010328303300336
Daniel Pinheiro Leal, Midori Sugaya, Hideharu Amano and Takeshi Ohkawa, “FPGA Acceleration of ROS2-Based Reinforcement Learning Agents,” 8th International Workshop on Computer Systems and Architectures (held in CANDAR’20), Naha, Okinawa, Japan, November 24-27, 2020, 7 pages, 2020.
Daniel Pinheiro Leal, Midori Sugaya, Hideharu Amano and Takeshi Ohkawa, “Automated Integration of High-Level Synthesis FPGA Modules with ROS2 Systems,” 2020 International Conference on Field Programmable Technology (FPT20), online, Dec. 09-11, 2020, 2 pages poster abstracts, 2020.
Chinatsu Yamamoto, Harumi Watanabe, Takeshi Ohkawa, Mikiko Sato, Ikuta Tanigawa, Kenji Hisazumi and Nobuhiko Ogura, “Layer Expression of Context-Oriented Programming and its Model-Driven Development on xtUML,” Asia Pacific Conference on Robot IoT System Development and Platform 2020 (APRIS2020), Regular paper (8 pages), 2020.
Koki Higashi, Yoichi Ishiwata, Takeshi Ohkawa and Midori Sugaya, “fogcached-ros: Hybrid main memory KVS server,” Asia Pacific Conference on Robot IoT System Development and Platform 2020 (APRIS2020), Regular paper (8 pages), 2020.
Masato Fukui, Yoichi Ishiwata, Takeshi Ohkawa and Midori Sugaya, “Predictive Many-core Allocation Method for Edge Off-Road Services,” Asia Pacific Conference on Robot IoT System Development and Platform 2020 (APRIS2020), Regular paper (8 pages), 2020.
Panadda Solod, Nattha Jindapetch, Daniel Leal and Takeshi Ohkawa, “Low-power High-performance Intelligent Camera Framework ROS-FPGA node,” Asia Pacific Conference on Robot IoT System Development and Platform 2020 (APRIS2020), 2020.
Ludi Wang and Takeshi Ohkawa, “A Prototype of Remote Robotic Hand Controlled by FPGA”, Asia Pacific Conference on Robot IoT System Development and Platform 2020 (APRIS2020), 2020.
Takeshi Ohkawa, Kazushi Yamashina, Takuya Matsumoto, Kanemitsu Ootsu, Takashi Yokota, "Automatic Generation Tool of FPGA Components for Robots ," IEICE Transactions on Information and Systems (Special Section on Reconfigurable Systems), Vol.E102-D No.5, pp.1012-1019, May. 2019.
Takeshi Ohkawa, Shotaro Tayama, Hayato Mori, Dohyung Lee, Hayato Amano, Itsuki Hirakawa, Mikiko Sato, Harumi Watanabe, "Design and Development of Networked Multiple FPGA Components for Autonomous Tiny Robot Car," 2019 International Conference on Field-Programmable Technology (ICFPT), Tianjin University, China, 9-13 December 2019, pp.473-475, 2019.
Takeshi Ohkawa, Ikuta Tanigawa, Mikiko Sato, Kenji Hisazumi, Nobuhiko Ogura, Harumi Watanabe, "Prototype of FPGA Dynamic Reconfiguration based-on Context-Oriented Programming," 13th IEEE International Symposium on Embedded Multicore/Many-core Systems-on-Chip, MCSoC 2019, Singapore, Oct. 1-4, 2019, pp.116-122, 2019.
Takeshi Ohkawa, "Component-based FPGA Development for Intelligent Robotics," 2019 International Workshop on Smart Info-Media Systems in Asia (SISA 2019),Sep.4-6,2019, pp.11-18 (SS1-3), 2019.
Takeshi Ohkawa, Yuhei Sugata, Harumi Watanabe, Nobuhiko Ogura, Kanemitsu Ootsu, Takashi Yokota, "High Level Synthesis of ROS Protocol Interpretation and Communication Circuit for FPGA," 2nd Workshop of Robot Software Engineering 2019 (RoSE2019) held with ICSE2019, 2019.
Shotaro Tayama, Takeshi Ohkawa, Mikiko Sato, Nobuhiro Ohe, Harumi Watanabe, "Simple Algorithm of Lane Detection for Tiny Robot Car by Single Horizontal Line Search of Camera Image," Asia Pacific Conference on Robot IoT System Development and Platform 2019 (APRIS2019), Nov. 2019.
Takeshi Ohkawa, Kazushi Yamashina, Hitomi Kimura, Kanemitsu Ootsu, Takashi Yokota, "FPGA Component Technology for Easy Integration of FPGA into Robot Systems," IEICE Transactions on Information and Systems (Special Section on Reconfigurable Systems), Vol.E101-D, No.2, pp.363-375, Feb. 2018.
Takeshi Ohkawa, Aoi Soya, Yuhei Sugata, Takuya Matsumoto, Kanemitsu Ootsu, Takashi Yokota, "Distributed Visual SLAM Processing in Robot-Cloud Cooperative System," International Workshop on Embedded Software for Industrial IoT (ESIIT Workshop 2018), March 23, 2018, International Congress Center ICC, Dresden, Germany (co-located with DATE 18)
Harumi Watanabe, Takeshi Ohkawa, Mikiko Sato, Nobuhiko Ogura, Makoto Imamura,"Towards Context-Dependent Robot Platform for Industrial Automation," International Workshop on Embedded Software for Industrial IoT (ESIIT Workshop 2018), March 23, 2018, International Congress Center ICC, Dresden, Germany (co-located with DATE 18)
Takeshi Ohkawa, Yuhei Sugata, Aoi Soya, Kanemitsu Ootsu, Takashi Yokota,"Robot-Cloud Cooperative Visual SLAM Processing using ROS-Compliant FPGA Component," DATE 2018 University Booth, March 21, 2018.
Yuhei Sugata, Takeshi Ohkawa, Kanemitsu Ootsu and Takashi Yokota, "Acceleration of publish/subscribe messaging in ROS-Compliant FPGA Component," The 8th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies (HEART2017), 7-9 June 2017
Takeshi Ohkawa, Kanemitsu Ootsu, Takashi Yokota, Katsuya Kikuchi, Masahiro Aoyagi, "Designing Efficient Parallel Processing in 3D Standard-chip Stacking System with Standard Bus," IEEE 11th International Symposium on Embedded Multicore/Many-core Systems-on-Chip (MCSoC-17), Seoul, Korea, September 18-20, 2017 (Accepted for presentation)
Takeshi Ohkawa, Yutaro Ishida, Yuhei Sugata, Hakaru Tamukoh, "ROS-Compliant FPGA Component Technology - FPGA installation into ROS," RosCon2017 (co-located with IROS2017), Vancouver, September 21-22 (Accepted for presentation)
Takeshi Ohkawa, Yuhei Sugata, Kanemitsu OOTSU, Takashi Yokota, "Distributed and Parallel Processing in Robot-Cloud System using ROS-Compliant FPGA Component," IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS2017), September 24-28, 2017. (poster presentation)
Kazushi Yamashina, Hitomi Kimura, Takeshi Ohkawa, Kanemitsu Ootsu, Takashi Yokota, "cReComp: Automated Design Tool for ROS-Compliant FPGA Component," IEEE 10th International Symposium on Embedded Multicore/Many-core Systems-on-Chip (MCSoC-16), Lyon Congress Center, Lyon, France, September 21-23, 2016
Takeshi Ohkawa, Kazushi Yamashina, Takuya Matsumoto, Kanemitsu Ootsu, Takashi Yokota, "Architecture Exploration of Robot System using ROS-Compliant FPGA Component," 27th IEEE International Symposium on Rapid System Prototyping (RSP) Oct 6-7, 2016
Kazushi Yamashina, Takeshi Ohkawa, Kanemitsu Ootsu, Takashi Yokota, "Proposal of ROS-compliant FPGA Component for Low-Power Robotic Systems ---case study on image processing application---," Second International Workshop on FPGAs for Software Programmers (FSP 2015) September 1, 2015, London, United Kingdom, pp.62-67
Takeshi Ohkawa, Daichi Uetake, Kanemitsu Ootsu, Takashi Yokota, "Component-based System Design of FPGA and Software for Intelligent Real-time Systems," Proc. 2014 International Workshop on Smart Info-Media Systems in Asia (SISA 2014), pp.64-69, Presented in 2014 International Workshop on Smart Info-Media Systems in Asia (SISA 2014) 8-10 October, 2014, Hotel Majestic Saigon, Ho Chi Minh City, Vietnam, Oct. 2014.
Takeshi Ohkawa, Takashi Yokota, Kanemitsu Ootsu, Masahiro Aoyagi, Katsuya Kikuchi and Hiroshi Nakagawa, "HW/SW Hybrid Processes Network with Application Layer Communication for 3D Chip Stacking Systems," 16th International Workshop on Innovative Architecture for Future Generation High-Performance Processors and Systems 2014 (IWIA2014) Kohala Coast, Hawaii (The Big Island), Mar 2014.
Takeshi Ohkawa, Takashi Yokota, Kanemitsu Ootsu, "A Prototyping System for Hardware Distributed Objects with Diversity of Programming Languages --- Design and Preliminary Evaluation," Proc. 2013 International Conference on Field Programmable Technology (ICFPT 13), pp.474--477, Dec. 2013.
Takeshi Ohkawa, Daichi Uetake, Takashi Yokota, Kanemitsu Ootsu, "Component-based FPGA Circuit Design and Verification for Robotic Systems using JavaRock and ORB Engine --- A Case Study," 2nd International Conference on Mechatronics and Control Engineering (ICMCE2013), Applied Mechanics and Materials, Vols.433-435 (2013), pp.1849-1852, (ISBN print: 978-3-03785-894-3), Aug. 2013.
Takeshi Ohkawa, Daichi Uetake, Takashi Yokota, Kanemitsu Ootsu, Takanobu Baba, "Reconfigurable and Hardwired ORB Engine on FPGA by Java-to-HDL Synthesizer for Realtime Application," Proc. 4th International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies (HEART 2013), June 2013.
Takeshi Ohkawa, Yukoh Matsumoto, Kenji Toda, “Ultra Android: High Energy Efficiency Parallel Java Objects Processing via Object Request Broker on Heterogeneous Multi-core Processor”, Cool Chips XII, Yokohama, Japan (2009), 2009/04/15
Runtao Qu, Satoshi Hirano, Takeshi Ohkawa, Takaya Kubota, "DisUnit: Enable Automated Distributed Testing for Distributed Systems," the 18th IASTED International Conference on Parallel and Distributed Computing and Systems (PDCS 2006)，Dallas,TX,USA、2006/11/13
Runtao Qu, Satoshi Hirano, Takeshi Ohkawa, Takaya Kubota, "MEMORY UTILIZATION ANALYSIS OF JAVA MIDDLEWARE FOR DISTRIBUTED REAL-TIME AND EMBEDDED SYSTEMS," 18th IASTED International Conference PARALLEL AND DISTRIBUTED COMPUTING AND SYSTEMS，Dallas, TX, USA、2006/11/13
Satoshi Hirano, Runtao Qu, Takeshi Ohkawa,"Zero GC communication broker system，" PCT/JP2006/318485(WIPO), 2006/09/19
Satoshi Hirano, Takeshi Ohkawa, Runtao Qu, "Software Document Generation System in Multiple Natural-Languages，" PCT/JP2006/314607 (WIPO), 2006/07/25
Koji Kotani, Soichiro Kita, Naoto Miyamoto, Takeshi Ohkawa, Amir Jamak, Tadahiro Ohmi, "A Personal-Use Single-Chip Emulator Using Dynamically Reconfigurable Logic Array", The 1st IEEE Asian Solid-State Circuits Conference (A-SSCC) 2005, 1 - 3 November 2005, Hsinchu, Taiwan (2005)
Khan, A. Miyamoto, N. Ohkawa, T. Jamak, A. Kita, S. Kotani, K. Ohmi, "An approach to realize time-sharing of flip-flops in time-multiplexed FPGAs", 2004 IEEE International Conference on Field-Programmable Technology, 2004. Proceedings. ,6-8 Dec. 2004, pp. 351- 354 (2004)
Takeshi Ohkawa, Toshiyuki Nozawa, Masanori Fujibayashi, Naoto Miyamoto, Karnan Leo, Soichiro Kita, Koji Kotani and Tadahiro Ohmi, "The Flexible Processor An Approach for Single-Chip Hardware Emulation by Dynamic Reconfiguration", Asia and South Pasific Design Automation Conference 2004(ASP-DAC 2004), 2004 January 27-30, Yokohama, Japan, (2004)
2004 The 6th LSI IP design Award / IP Award, May 20, 2004
"A Study of Design-Automation System for Short Term LSI Development", (IN JAPANESE), Ph. D. Thesis, Tohoku University, Japan, March 2003
Takeshi Ohkawa, Toshiyuki Nozawa, Masanori Fujibayashi, Naoto Miyamoto, Karnan Leo, Soichiro Kita, Koji Kotani and Tadahiro Ohmi, "The Flexible Processor - Dynamically Reconfigurable Logic Array for Personal-use Emulation System", Digest of Technical Papers, 2003 symposium on VLSI circuits, 2003 June 10-13, Kyoto, Japan, (2003), 279-282
Amir Jamak, Takeshi Ohkawa, Koji Kotani, Naoto Miyamoto, Masanori Fujibayashi, Masanobu Yamashita, Leo Karnan, Soichiro Kita and Tadahiro Ohmi, "Flexible Processor: A Dynamically Reconfigurable System for a Novel Approach to Digital Information Processing", Internation Conference on Information and Communication Technology (IKT2003), 2003 December 1-3, Sarajevo, Bosnia and Herzegovina, (2003),
Takeshi Ohkawa, Amir Jamak, Koji Kotani and Tadahiro Ohmi, "The design of programmable interconnect architecture for a dynamically reconfigurable LSI - the Flexible Processor", Proceesings of the 1st student-organizing international mini-conference on information electronics system (SOIM-COE03), 2003 November 5-7, Sendai, Japan, (2003), 182-185
Takeshi Ohkawa, Osamu Nakamura, Herzl Aharoni, and Tadahiro Ohmi, "Highly Reliable Gate Oxidation Using Catalytic Water Vapor Generator (WVG) for MOS Device Fabrication", The Thin Solid Films 405 (2002) 290-299
Takeshi Ohkawa, Osamu Nakamura, Shigetoshi Sugawa, Herzl Aharoni, and Tadahiro Ohmi, "Improving the Reliability and the Insulation Properties of Gate Oxide in the Gate Injection Mode by Using a New Procedure of (100) Si surface and Si/SiO2 Interface Treatments", IEEE transactions on Electron Devices, Vol. 48, pp. 2957-2959, Dec 2001
Takeshi Ohkawa, Yoshihide Wakayama, Sadao Kobayashi, Shigetoshi Sugawa, Herzl Aharoni, and Tadahiro Ohmi, "The Effect Of Organic Contaminations Molecular Weights in the Cleanroom Air on MOS Devices Degradation - a Controlled Laminar Air Flow Experiment", Extended Abstracts Book of the 2001 International Conference on Solid State Devices and Materials (SSDM2001), Tokyo, Japan, September, 2001, pp. 24-25
"A Study of Improving the Reliabiltiy of Ultra-thiin Gate Oxide" (IN JAPANESE) Thesis for the M.Sc. Degree, Tohoku University, Japan, March 2000
Osamu NAKAMURA, Takeshi OHKAWA, and Tadahiro OHMI, "Improvement of Gate Oxide Integrity by Preparing Atomic Order Flattened Si (100) Surface," The Physics and Chemistry of SiO2 and The Si-SiO2 Interface-4, Edited by H. Z. Massoud, I. J. R. Baumvol, M. Hirose and E. H. Poindexter, PV2000-2, The Electrochemical Society, Peninngton, NJ, pp.101-112, 2000
Yoshihide Wakayama, Takeshi Ohkawa, Osamu Nakamura, Herzl Aharoni, and Tadahiro Ohmi, "Controlled Contamination Experiments fo Gate Oxide Surfaces by Organic Compounds and their Effect on the reliability of M.O.S Devices" AGIL 2000 International Conference on Materials Science and Technologies, November 8-9, 2000, Jerusalem, Israel, p. 130
T. Ohkawa, O. Nakamura, H. Aharoni, T. Ohmi, "Improvement of MOS Device Reliability and Performance by Atomic Order Flattening of Si(100) Surfacce and Si-SiO2 Interface Selective Nitridation", AGIL 2000 International Conference on Materials Science and Technologies, November 8-9, 2000, Jerusalem, Israel, p. 67
Yoshihide Wakayama, Takeshi Ohkawa, Osamu Nakamura, Sadao Kobayashi, Shigetoshi Sugawa, Herzl Aharoni, and Tadahiro Ohmi, "The Effect of Organic Compounds Contamination on the Electrical Characteristics of Ultra-Thin Gate Oxide Films," Extended Abstracts Book of the 2000 International Conference on Solid State Devices and Materials (SSDM2000), Sendai, Japan, August 29-31, 2000, pp. 550-551
Takeshi OHKAWA, Osamu NAKAMURA, and Tadahiro OHMI, "Improvement of Gate Oxide Integrity by Preparing Atomic Order Flattened Si (100) Surface," Extended Abstracts, The 197th Meeting of The Electrochemical Society, Abstract No. 452, Vol. 2000-I, Tronto, Canada, May 2000
Osamu Nakamura, Takeshi Ohkawa, Munekatsu Nakagawa, and Tadahiro Ohmi, "Formation Process of Highly Realiable Gate Oxide Using Water Vapor Generator System," Precision Science and Technology for Perfect Surface, Proceedings of the 9th International Conference on Production Engineering (9th ICPE), Edited by Y. Furukawa, Y. Mori, and T. Kataoka, JSPE Publication Series No. 3, pp. 426-431, August-September, 1999
Tadahiro Ohmi, Osamu Nakamura, Takeshi Ohkawa, and Yukinori Morita, "Great Importance of Atomic Order Flatness of Substrate Surface for Very Advanced ULSI," Precision Science and Technology for Perfect Surface, Proceedings of the 9th International Conference on Production Engineering (9th ICPE), Edited by Y. Furukawa, Y. Mori, and T. Kataoka, JSPE Publication Series No. 3, pp. xxiii-xxix Osaka, <invited>, August-September, 1999
Tadahiro Ohmi, Katsuyuki Sekine, Takeshi Ohkawa, Ryu Kaihara, Yasuyuki Shirai, and Masaki Hirayama, ”PASSIVITY ISSUE IN DEVICE FABRICATION", Electrochemical Society Proceedings, Vol. 99-42, pp.764-777, May 1999
O. Nakamura, T. Ohkawa, M. Nakagawa, Y. Shirai, K. Kawada, N. Ikeda, Y. Minami, A. Morimoto and T. Ohmi, "Highly reliable Ultra Thin Gate Oxide Grown using Water Vapor Generator," Abstract, AVS 46th International Symposium <invited>, pp.32, Seattle, USA, Oct. 1999