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[[[Japanese]>Chikara Ohta's Front Page (Japanese)]] #norelated * Greetings [#bb92e90b] Welcome to Chikara Ohta's New Home Page.~ Now I am moving from the old to the new one.~ My old web page is [[here:http://www.al.cs.kobe-u.ac.jp/~ohta/old_public_html]].~ The new one is still under construction, so please be patient. *** Personal Information [#d2fb21d3] #ref(http://www.al.cs.kobe-u.ac.jp/~ohta/image/90x120.jpg,right,nowrap,around,zoom,120x150); - Name: Chikara OHTA (Given/Family) - Title: Associate Professor - Degree: Ph.D (Dr. Eng., [[Osaka University:http://www.osaka-u.ac.jp/eng/index.html]]) - Affiliation: [[Kobe University:http://www.kobe-u.ac.jp/en/index.htm]], [[Graduate School of Engineering:http://www.eng.kobe-u.ac.jp/en/index.html]], [[Department of Computer Science and Systems Engineering:http://www.cs.kobe-u.ac.jp/cs-eng/e-index.html]], [[System Infomatics Laboratory, CS14:http://www.al.cs.kobe-u.ac.jp/]] - Address: 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, JAPAN - Phone/Fax: +81 - 78 - *** - 6315 (*** is "803") - E-mail: ohta [amphora] ****.kobe-u.ac.jp (**** is "port") *** Professional Society Memberships [#ze390770] - [[IEEE:http://www.ieee.org]] [[Communications Society:http://www.comsoc.org]], [[Computer Society:http://www.computer.org]] - [[ACM:http://www.acm.org]] [[SIGCOMM:http://www.sigcomm.org]] - [[IEICE:http://www.ieice.org/eng/]] [[Communications Society:http://www.ieice.org/cs/]] - [[IPSJ:http://www.ipsj.or.jp/english/]] *** Professional Social Activities (Current Status) [#d93663b2] - [[IEICE:http://www.ieice.org/eng]] [[Communication Society:http://www.ieice.org/cs/]] -- Editor of [[Transaction on Communications (EB):http://www.ieice.org/cs/pub/trans_commun_e.html]] (2008.5-2010.5) -- Committee of [[Technical Committee on Network Systems:http://www.ieice.org/cs/ns/index.html]] (2006.5-2009.5) - [[IPSJ:http://www.ipsj.or.jp/english/]] -- Committee of [[SIG-Mobile Computing and Ubiquitous Communications:http://www.ishilab.net/mbl/index-e.html]] (2007.5-) - [[ARIB:http://www.arib.or.jp/english/index.html]] -- Committee of Ship Wireless Ad-hoc Networks (2007.11-) - [[JARI:http://www.jari.or.jp/en/]] -- Committee of Feasible Study on Network Simulator for Safty Driving Support Systems (2008.7-2009.4) *** Research Interests [#p3017ac9] - Sensor Networks - Mobile Ad-hoc Networks - Overlay Networks - Wireless Access Networks - Network Performance Evaluation - Network Simulation *** Grants [#z92b7f72] - [[Ministry of Internal Affairs and Communications:http://www.soumu.go.jp/english/]], [[Strategic Information and Communications R&D Promotion Programme (SCOPE):http://www.soumu.go.jp/joho_tsusin/scope/]], Local ICT Promortion - [[Japan Society for the Promotion of Science:http://www.jsps.go.jp/english/index.html]], Grant-in-Aid for Scientific Research (C) *** Publications (Rrecent) [#s5acd972] - Journal/Transactions (Refereed) -- Augusto Foronda, Chikara Ohta, and Hisashi Tamaki, "Scheduling Algorithms for Maximizing Throughput with Zero-Forcing Beamforming in a MIMO Wireless System," IEICE Trans on Communications, Vol.E91-B,No.06,pp.-,Jun. 2008. -- Takashi Matsuda, Masumi Ichien, Hiroshi Kawaguchi, Chikara Ohta, and Masahiko Yoshimoto, "Data Transmission Scheduling based on RTS/CTS Exchange for Periodic Data Gathering Sensor Networks," IEICE Trans. Communications, vol.E90-B, no.12, pp.3410-3417, Dec. 2007. -- Augusto Foronda, Chikara Ohta, Masahiko Yoshimoto, and Yoji Okada, "Service Interval Optimization with Delay Bound Guarantee for HCCA in IEEE 802.11e WLANs," IEICE Trans on Communications, vol.E90-B, no.11, pp.3158-3169, Nov. 2007. -- S. Mikami, T. Aonishi, H. Yoshino, C. Ohta, H. Kawaguchi, and M. Yoshimoto, "Aggregation Efficient-Aware Greedy Incremental Tree Routing for Wireless Sensor Networks," IEICE Trans. Communications, Vol.E89-B, No.10, pp.2741-2751, Oct. 2006. - International Conference (Refereed) -- Shintaro Izumi, Takashi Matsuda, Hiroshi Kawaguchi, Chikara Ohta, and Masahiko Yoshimoto, "Hop Count Aware Broadcast Algorithm with Random Assessment Delay Extension for Wireless Sensor Networks," 7th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2008), Bandos Island, Maldives, April 2008. -- Takashi Matsuda, Shintaro Izumi, Takashi Takeuchi, Hidehiro Fujiwara, Hiroshi Kawaguchi, Chikara Ohta, and Masahiko Yoshimoto, "Impact of Divided Static Random Access Memory Considering Data Aggregation for Wireless Sensor Networks," 7th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2008), Bandos Island, Maldives, April 2008. -- Ken-ichiro Yagura, Yusuke Kato, Takayuki Kitada, Kazuhiro Yamaguchi, Yumi Takaki, Mitsuhiro Kuwano, and Chikara Ohta, "Implementation of Publish/Subscribe System on Wireless Mesh Networks -Word-mouth Information Distribution Service-," 7th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2008), Bandos Island, Maldives, April 2008. -- Augusto Foronda, Chikara Ohta, Hisashi Tamaki, "A Fair Scheduling Algorithm to Improve Stability Region with Zero-Forcing Beamforming," Proc. IEEE International Symposium on Wireless Communication Systems 2007 (ISWCS2007), CD-ROM, Trondheim, Norway, 16-19 October, 2007. -- Takashi Matsuda, Takafui Aonishi, Takashi Takeuchi, Hiroshi Kawaguchi, Chikara Ohta, and Masahiko Yoshimoto, "Multipath Routing Using Isochronous Medium Access Control with Multi Wakeup Period for Wireless Sensor Networks," Proc. IEEE International Symposium on Wireless Communication Systems 2007 (ISWCS2007), pp. 718-721, Trondheim, Norway, 16-19 October, 2007. -- Shintaro Izumi, Takashi Matsuda, Hiroshi Kawaguchi, Chikara Ohta, and Masahiko Yoshimoto, "Improvement of Counter-based Broadcasting by Random Assessment Delay Extension for Wireless Sensor Networks," International Conference on Sensor Technologies and Applications (SENSORCOMM 2007), pp.76-81, Valencia, Spain, October 14-20, 2007. -- Yu Otake, Masumi Ichien, Takashi Takeuchi, Akihiro Gion, Shinji Mikami, Hidehiro Fujiwara, Hiroshi Kawaguchi, Chikara Ohta, and Masahiko Yoshimoto, "Cross-Layer Design for Low-Power Wireless Sensor Node using Long-Wave Standard Time Code," International Conference on Sensor Technologies and Applications (SENSORCOMM 2007), pp.341-346, Valencia, Spain, October 14-20, 2007. -- Fumio Ishizaki and Chikara Ohta, "Analysis of the Statistical Time-Access Fairness Index under a Scheduler Exploiting Multiuser Diversity," Proc. Wireless Telecommunications Symposium 2007, CD-ROM, Pomona, CA, April 26-28, 2007. -- Y. Higuchi, A. Foronda, C. Ohta, M. Yoshimoto, and Y. Okada, "Delay Guarantee and Service Interval Optimization for HCCA in IEEE 802.11e WLANs," Proc. IEEE Wireless Communications and Networking Conference (WCNC 2007), pp.2080-2085, Hong Kong, China, March 2007. -- S. Mikami, T. Takeuchi, H. Kawaguchi, C. Ohta, and M. Yoshimoto, "An Efficiency Degradation Model of Power Amplifier and the Impact against Transmission Power Control," Proc. IEEE 2007 Radio and Wireless Symposium (RWS 2007), pp.447-450, Long Beach, California, USA, Jan. 2007. -- S. Mikami, M. Ichien, T. Takeuchi, H. Kawaguchi, C. Ohta, and M. Yoshimoto, "A 356-µW, 433-MHz, Rail-to-Rail Voltage Amplifier with Carrier Sensing Function for Wireless Sensor Networks," Proc. IEEE 2007 Radio and Wireless Symposium (RWS 2007), pp.451-454, Long Beach, California, USA, Jan. 2007. -- Augusto Foronda, Leandro Corrrea Pykosz, Chikara Ohta, and Masahiko Yoshimoto, "A New Framework to Provide Quality of Service in MPLS Network," Proc. International Telecommunications Symposium (ITS2006), pp.765-769, Fortaleza-CE, Brazil, September 3-6, 2006. -- M. Ichien, T. Takeuchi, S. Mikami, H. Kawaguchi, C.Ohta and M. Yoshimoto, "Isochronous MAC using Low Frequency Radio Wave Time Synchronization for Wireless Sensor Networks," Proc. First International Conference on Communications and Electronics (ICCE 2006), pp.172-177, Hanoi, Vietnam, Oct. 2006 -- T. Matsuda, M. Ichien, S. Mikami, H. Kawaguchi, C. Ohta, and M. Yoshimoto, "Data Transmission Scheduling based on RTS/CTS Exchange for Periodic Data Gathering Sensor Networks," First International Conference on Communications and Electronics (ICCE 2006), Hanoi, Vietnam, Oct. 2006. -- T. Aonishi, T. Matsuda, S. Mikami, C. Ohta, H. Kawaguchi, and M. Yoshimoto, "Impact of Aggregation Efficiency on GIT Routing for Wireless Sensor Networks," Proc. International Workshop on Wireless and Sensor Networks, Columbus, Ohio, USA, Aug. 2006. - Domestic Conference (Not Refereed) -- Ken-ichiro Yagura, Yusuke Kato, Takayuki Kitada, Yumi Takaki, Mituhiro Kuwano, and Chikara Ohta, "Information Distribution Publish/Subscribe-type Word-mouth Information Distribution Service," Proc. IEICE General Conference, B-6-6, vol. 2, p. 6, (Kita-Kyushu) March 2008. -- Takayuki Kitada, Ken-ichiro Yagura, Yusuke Kato, Yumi Takaki, Chikara Ohta, Daisuke Nishimoto, Ryota Matsui, Kazuhiro Yamaguchi, and Mituhiro Kuwano, "Implementation of Word-mouth Information Distribution Service with Publisher/Subscribe Method on the Wireless Ad-hoc Network Infrastructure," Proc. IEICE General Conference, B-6-7, vol. 2, p. 7, (Kita-Kyushu) March 2008.
