Analysis and experiments of maximum throughput in wireless multi-hop networks for VoIP application Masahiko Inaba, Yoshihiro Tsuchiya, Hiroo Sekiya, Shiro Sakata, and Kengo Yagyu IEICE Transactions on Communications, vol.E92-B, no.11, pp.3422-3431, Nov. 2009. [Abstract | pdf] Analysis and design of class DE amplifier with nonlinear shunt capacitances Hiroo Sekiya, Takayuki Watanabe, Tadashi Suetsugu, and Marian K. Kazimierczuk IEEE Transactions on Circuits and Systems Part I: Regular Papers, vol.56, no.10, pp.2362-2371, Oct. 2009. [Abstract | pdf] Low-complexity selected mapping schemes with subband division in OFDM systems (in Japanese) Tomoya Imamachi, Tatsuru Watanabe, Hiroo Sekiya, and Shiro Sakata IEICE Transactions on Communications, vol.J92-B, no.8, pp.1245-1255, Aug. 2009. [Abstract | pdf] A new framework of removing salt and pepper impulse noise for the noisy image including many noise-free white and black pixels Song Li, Caizhu Wang, Yeqiu Li, Ling Wang, Shiro Sakata, Hiroo Sekiya, and Shingo Kuroiwa IEEJ Transactions on Electronics, Infomation and Systems, vol.129, no.7, pp.1427-1434, July 2009. [Abstract | pdf] QoS-aware MAC protocol based on the ratio of buffer usage in multihop network (in Japanese) Masaki Matsumoto, Hiroo Sekiya, Jianming Lu, Takashi Yahagi, and Shiro Sakata IEICE Transactions on Communications, vol.J92-B, no.2, pp.390-399, Feb. 2009. [Abstract | pdf]

An efficient collaborative filtering algorithm using SVD-free latent semantic indexing and particle swarm optimization Amira Abdelwahab, Hiroo Sekiya, Ikuo Matsuba, Yasuo Horiuchi, Shingo Kuroiwa, and Masafumi Nishida 2009 International Conference on Natural Language Processing and Knowledge Engineering (NLP-KE2009) , pp.1-4 , Sept. 2009. [Abstract | pdf] Design of class-EM power amplifier with one input signal Ryosuke Miyahara and Hiroo Sekiya European Conference on Cognitive Ergonomics 2009 (ECCE2009), pp.3859-3864, Sept. 2009. [Abstract | pdf] Design of RF-choke inductors using core geometry coefficient Hiroo Sekiya and Marian K. Kazimierczuk Electrical Manufacturing Coil Winding & Coating Expo (EMCW2009), Sept. 2009. [Abstract | pdf] Design of AC resonant inductors using area product method Marian K. Kazimierczuk and Hiroo Sekiya 2009 IEEE Energy Conversion Congress and Exposition (ECCE2009), pp.994-100, Sept. 2009. [Abstract | pdf] Analysis of maximum UDP throghput of short-hop string networks for VoIP applications Yoshihiro Tsuchiya, Masahiko Inaba, Masaki Matsumoto, Hiroo Sekiya, Shiro Sakata and Kengo Yagyu The 12th International Symposium on Wireless Personal Multimedia Communications (WPMC2009), Sept. 2009. [Abstract | pdf] QoS-based routing in multichannel multihop WLANs Atsushi Nagasaki, Hiroo Sekiya, Shiro Sakata, Kengo Yagyu The 12th International Symposium on Wireless Personal Multimedia Communications (WPMC2009), Sept. 2009. [Abstract | pdf] Design of class-DE amplifier with linear and nonlinear shunt capacitances for 25 % duty ratio Hiroo Sekiya, Ryosuke Miyahara, and Marian K. Kazimierczuk 2009 IEEE International Symposium on Circuits and Systems (ISCAS2009) , pp.2870-2873 , May 2009. [Abstract | pdf] Experimental evaluation of interleaving technique in class E2 dc/dc converter with phase control Motoki Katayama, Hiroo Sekiya, and Marian K. Kazimierczuk 2009 International Workshop on Nonlinear Circuits and Signal Processing (NCSP2009), pp.593-596, Mar. 2009. [Abstract | pdf]

MAC protocol for hidden terminal problem alleviation using transmission pause control in wireless multi hop networks (in Japanese) Shota Furukawa, Hiroo Sekiya, Nobuyoshi Komuro, and Shiro Sakata IEICE Technical Committee on Ad Hoc Networks, vol.109, no.274, pp.19-24, Oct. 2009. [Abstract | pdf] Subband division scheme in SLM for computation reduction (in Japanese) Tomoya Imamachi, Hiroo Sekiya, and Shiro Sakata IEICE Technical Committee on Communication Systems, vol.108, no.454, pp.19-24, Feb. 2009. [Abstract | pdf]