Joint Optimization of Charging Location and Time for Network Lifetime Extension in WRSNs Thuy Dung Nguyen, Tuyen Nguyen, Thanh Hung Nguyen, Kien Nguyen, Phi Le Nguyen IEEE Transactions on Green Communications and Networking (Early Access), pp.1-1, Dec. 2021. [Abstract | pdf] Frequency-Modulation Controlled Load-Independent Class-E Inverter Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Taichi Mishima, Yuki Ito, Takeshi Uematsu, Kien Nguyen, Hiroo Sekiya IEEE Access, vol.9, pp.144600-144613, Nov. 2021. [Abstract | pdf] Comprehensive and Simplified Numerical Design Procedure for Class-E Switching　Circuits Wenqi Zhu, Yutaro KOMIYAMA, Kien NGUYEN, and Hiroo Sekiya IEEE Access, Oct. 2021. [Abstract | pdf] Analysis and Design of 6.78 MHz Wireless Power Transfer System for Robot Arm Katsuki Tokano, Wenqi Zhu, Tatsuki Osato, Kien Nguyen, Hiroo Sekiya IEICE Transactions on Communications, pp.1-10, Sept. 2021. [Abstract | pdf] Empowering 5G Mobile Devices with Network Softwarization Kien Nguyen, Phi Le Nguyen, Zhetao Li, Hiroo Sekiya IEEE Transaction on Network and Service Management, vol.18, Issue 3, pp.2492-2501, Sept. 2021. [Abstract | pdf] A novel design methodology for extended continuous class-F power amplifiers in wireless applications Sepehr Zarghami, Mohsen Hayati, Marian K. Kazimierczuk, and Hiroo Sekiya Wireless Networks, vol.27, pp.3947-3968, Aug. 2021. [Abstract | pdf] An On-demand Charging for Connected Target Coverage in WRSNs using Fuzzy Logic and Q-learning Phi Le Nguyen, La Van Quan, Anh Duy Nguyen, Thanh-Hung Nguyen, Kien Nguyen Sensors, vol.21, no.16: 5520, Aug. 2021. [Abstract | pdf] QIH: An Efficient Q-Learning Inspired Hole-Bypassing Routing Protocol for WSNs Phi Le Nguyen, Nang Hung Nguyen, Khanh Le, Thanh-Hung Nguyen, Kien Nguyen IEEE Access, vol.9, pp.123414-123429, Aug. 2021. [Abstract | pdf] Implementation of Micropayment System Using IoT Devices Ryota Nakada, Kien Nguyen, Hiroo Sekiya Journal of Signal Processing, vol.25, no.4, pp.137-140, July 2021. [Abstract | pdf] High-Frequency Single-Switch PFC with Frequency-Modulation Controlled Class-E2 Converter Wenqi Zhu, Takayuki Ikari, Giorgio Lovison, Keisuke Inoue, Shigeharu Yamagami, and Hiroo Sekiya IET Power Electronics, pp.1-11, June 2021. [Abstract | pdf] Decentralizing Private Blockchain-IoT Network with OLSR Chen Xuan, Shujuan Tian, Kien Nguyen, Hiroo Sekiya Future Internet, vol.13, Issue 7:168, June 2021. [Abstract | pdf] Early wake-up ahead node for fast code dissemination in wireless sensor networks Qingyong Deng, Yan Ouyang, Shujuan Tian, Rong Ran, Jinsong Gui, and Hiroo Sekiya IEEE Transactions on Vehicular Technology, vol.70, no.4, Apr. 2021. [Abstract | pdf] PM2.5 Prediction Using Genetic Algorithm-based Feature Selection and Encoder-Decoder Model Minh Hieu Nguyen, Phi Le Nguyen, Kien Nguyen, Van An Le, Thanh-Hung Nguyen, Yusheng Ji IEEE Access, vol.9, pp.57338-57350, Apr. 2021. [Abstract | pdf] An Experimental Study on Performance of Private Blockchain in IoT Applications Chen Xuan, Kien Nguyen, Hiroo Sekiya Elsevier Peer-to-Peer Networking and Applications, Mar. 2021. [Abstract | pdf] Analysis and Design of Load-Independent Class-E Synchronous Rectifier  (in Japanese) Tatsuki OSATO, Asiya, Xiuqin WEI, Wenqi ZHU, Kien NGUYEN, and Hiroo, and SEKIYA , vol.J104-B, no.2, pp.83-92, Feb. 2021. [Abstract | pdf]

SDN-based Resource Provisioning System with IOTA Hideya Masaki, Kien Nguyen, Hiroo Sekiya IEEE Workshop on Nonlinear Circuit Networks December 3-4, 2021, pp.9-12, Dec. 2021. [Abstract | pdf] Wireless Power Transfer System with Load-Independent Inverse Class-E Oscillator Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Kien Nguyen, Takeshi Uematsu, Yuki Ito, Taichi Mishima, and Hiroo Sekiya The 2021 Nonlinear Science Workshop (NLSW2021), p.39, Dec. 2021. [Abstract | pdf] Constant Voltage Output Autonomous Wireless Power Transfer System Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Kien Nguyen, Takeshi Uematsu, Yuki Ito, Taichi Mishima, and Hiroo Sekiya 2021 IEEE Workshop on Nonlinear Circuit Networks (NCN2021), pp.21-24, Dec. 2021. [Abstract | pdf] Load-Independent Inverse Class-E Oscillator with Armstrong-Oscillator Based Topology Yutaro Komiyama, Shuya Matsuhashi, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya The 18th International SoC Design Conference (ISOCC 2021), pp.175-176, Oct. 2021. [Abstract | pdf] A QoS-guaranteed System with Software Defined Networking and Micropayment Hideya Masaki, Kien Nguyen, Hiroo Sekiya 2021 26th IEEE Asia-Pacific Conference on Communications (APCC), pp.94-98, Oct. 2021. [Abstract | pdf] Realizing Mobile Air Quality Monitoring System: Architectural Concept and Device Prototype Viet An Nguyen, Viet Hung Vu, Van Sang Doan, Thanh Hung Nguyen, Do Phan Thuan, Kien Nguyen, Phi Le Nguyen, Minh Thuy Le 2021 26th IEEE Asia-Pacific Conference on Communications (APCC), pp.115-120, Oct. 2021. [Abstract | pdf] A Comparison of Distributed Ledger Technologies in IoT: IOTA Versus Ethereum Xuan Chen, Ryota Nakada, Kien Nguyen, Hiroo Sekiya IEEE ISCIT 2021, Oct. 2021. [Abstract | pdf] PSO-based Design Procedure for Class-DE Inverter Wenqi Zhu, Yutaro KOMIYAMA, Kien NGUYEN, and Hiroo Sekiya 18th International SoC Design Conference (ISOCC 2021), Oct. 2021. [Abstract | pdf] Heuristic Algorithm-Based Design Method for Class-E Switching Circuits Wenqi Zhu, Yutaro KOMIYAMA, Kien NGUYEN, and Hiroo Sekiya IEEE Annual Energy Conversion Congress and Exposition (ECCE2021), Oct. 2021. [Abstract | pdf] Class-E Inverter with Frequency Modulation Control Yutaro Komiyama, Wenqi Zhu, Kien Nguyen, and Hiroo Sekiya The 10th International Conference on Renewable Energy Research and Applications (ICRERA 2021), pp.94-98, Sept. 2021. [Abstract | pdf] Efficient Prediction of Discharge and Water Levels Using Ensemble Learning and Singular-Spectrum Analysis-based Denoising Anh Duy Nguyen, Viet Hung Vu, Minh Hieu Nguyen, Duc Viet Hoang, Thanh Hung Nguyen, Kien Nguyen, Phi Le Nguyen the 34th International Conference on Industrial, Engineering & Other Applications of Applied Intelligent Systems (IEA/AIE 2021), July 2021. [Abstract | pdf] Load Independent Class-E-1 Inverter with Shunt Capacitance Ayano Komanaka, Wenqi Zhu, Kien Nguyen, Hiroo Sekiya, and Xiuqin Wei ISIE2021, June 2021. [Abstract | pdf] Optimal Design of 6.78 MHz Wireless Power Transfer System for Robot Arm Katsuki Tokano, Wenqi Zhu, Tatsuki Osato, Kien Nguyen, Hiroo Sekiya International Symposium on Circuits and Systems, May 2021. [Abstract | pdf] "Multi-Agent Multi-Armed Bandit Learning for Offloading Delay Minimization in V2X Networks Nang Hung Nguyen, Phi Le Nguyen, Hieu Dinh, Thanh Hung Nguyen, Kien Nguyen The 19th IEEE international conference on embedded and ubiquitous computing (EUC 2021), Apr. 2021. [Abstract | pdf] Analysis and Design of Load-Independent ZCS Parallel-Resonant Inverter Ayano Komanaka, Wenqi Zhu, Xiuqin Wei, Kien Nguyen, and Hiroo Sekiya RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, pp.309-312, Mar. 2021. [Abstract | pdf] Evaluating Congestion Control Algorithms of Raspberry Pi in Wi-Fi Network Yuki Horie, Kien Nguyen and Hiroo Sekiya RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, pp.182-185, Mar. 2021. [Abstract | pdf] Implementation of Micropayment System Using IoT Devices Ryota Nakada, Kien Nguyen, and Hiroo Sekiya RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, pp.178-181, Mar. 2021. [Abstract | pdf]

Principle Operation and Design Example of Mutli-hop Magnetic-Resonant Wireless Power Transfer System (in Japanese) Hiroo Sekiya IEICE Tech. Rep, vol. 121, no. 234 , pp.111-116, Nov. 2021. [Abstract | pdf] Examination status for the realization of wire-free robots (in Japanese) 清水聡, 芹澤和伸, 佐久間和司, 鈴木義規, 関屋大雄, 大平昌敬 , vol.121, no.266, pp.27-30,, Nov. 2021. [Abstract | pdf] Wireless Spiking Neural Networks and Its FPGA Implementation (in Japanese) Hiroo Sekiya, Kien Nguyen, Hiroyuki Torikai IEICE Tech. Rep, Oct. 2021. [Abstract | pdf] Design Theory of Multi-Hop Multi-Output Load-Independent Wireless Power Transfer Systems (in Japanese) Hiroo Sekiya, Katsuki Tokano, Kien Nguyen, Satoru Shimizu, Kazunobu Serizawa, Kazushi Sakuma, Yoshinori Suzuki IEICE Tech. Rep., EE2021-13, pp.6-11, Oct. 2021. [Abstract | pdf] Load-Independent Multi-power Multi-hop WPT System for Robot Arm (in Japanese) Katsuki TOKANO, Wenqi ZHU, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep., EE2021-14, pp.12-17, Oct. 2021. [Abstract | pdf] Analysis and Design of Load-Independent ZVS Parallel-Resonant Inverter (in Japanese) Ayano KOMANAKA, Wenqi ZHU, Xiuqin WEI,Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Semiconductor Power Converter IEEJ Industry Applications Society (SPC) SPC-21-099, pp.26-31, July 2021. [Abstract | pdf] Design of Load-Independent Multi-hop WPT System for Robot Arm (in Japanese) Katsuki TOKANO, Wenqi ZHU, Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Semiconductor Power Converter IEEJ Industry Applications Society (SPC) SPC-21-100, pp.32-37, July 2021. [Abstract | pdf] Load-Independent Class-E Inverter with Frequency-Modulation Control (in Japanese) Yutaro KOMIYAMA, Kien NGUYEN, Taichi MISHIMAN, Yuki ITO, Takeshi UEMATSU, and Hiroo SEKIYA IEICE Tech. Rep., EE2021-8, vol.121, no.124, pp.6-11, July 2021. [Abstract | pdf] Guaranteed Network Resource Provision with Micropayment (in Japanese) Hideya MASAKI, Kien NGUYEN, and Hiroo SEKIYA Technical Committee on Network Systems (NS)NS2021-32 , vol.121, no.102, pp.1-6, July 2021. [Abstract | pdf] Heuristic Algorithm-Based Design Method for Class-E Switching Circuits (in Japanese) Wenqi ZHU, Katsuki TOKANO, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep., EE2020-46, Mar. 2021. [Abstract | pdf] Load Independent E^2 Design of Class 2 DC-DC Converters (in Japanese) Tatsuki OSATO, Xiuqin WEI, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep., EE2020-45, pp.28-33, Mar. 2021. [Abstract | pdf] Heuristic Algorithm-Based Design Method for Class-E Switching Circuits (in Japanese) Wenqi ZHU, Katsuki TOKANO, Kien NGUYEN, and Hiroo SEKIYA IEICE Tech. Rep.,EE2020-46, pp.34-38, Mar. 2021. [Abstract | pdf]