Hiroyuki SAKAI


K-Band AlGaN/GaN MIS-HFET on Si with High Output Power over 10 W
Noboru NEGORO Masayuki KURODA Tomohiro MURATA Masaaki NISHIJIMA Yoshiharu ANDA Hiroyuki SAKAI Tetsuzo UEDA Tsuyoshi TANAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/08/01
Vol. E95-C  No. 8  pp. 1327-1331
Type of Manuscript:  Special Section PAPER (Special Section on Heterostructure Microelectronics with TWHM 2011)
Category: GaN-based Devices
Keyword: 
AlGaN/GaN MIS-HFETK-bandpower amplifierSi substratehigh-temperature chemical vapor deposition SiN
 Summary | Full Text:PDF

Assigning Polarity to Causal Information in Financial Articles on Business Performance of Companies
Hiroyuki SAKAI Shigeru MASUYAMA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2009/12/01
Vol. E92-D  No. 12  pp. 2341-2350
Type of Manuscript:  Special Section PAPER (Special Section on Natural Language Processing and its Applications)
Category: Document Analysis
Keyword: 
polarity assignmenttext miningcausal informationknowledge extractioninformation extraction
 Summary | Full Text:PDF

An Informative DOM Subtree Identification Method from Web Pages in Unfamiliar Web Sites
Masanobu TSURUTA Hiroyuki SAKAI Shigeru MASUYAMA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/04/01
Vol. E91-D  No. 4  pp. 986-989
Type of Manuscript:  Special Section LETTER (Special Section on Knowledge-Based Software Engineering)
Category: 
Keyword: 
informative region identificationWeb documentDOMlayout analysis
 Summary | Full Text:PDF

Cause Information Extraction from Financial Articles Concerning Business Performance
Hiroyuki SAKAI Shigeru MASUYAMA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/04/01
Vol. E91-D  No. 4  pp. 959-968
Type of Manuscript:  Special Section PAPER (Special Section on Knowledge-Based Software Engineering)
Category: Knowledge Engineering
Keyword: 
cause informationcausal expressionknowledge extractioninformation extraction
 Summary | Full Text:PDF

A Statistical Method for Acquiring Knowledge about the Abbreviation Possibility of Some of Multiple Adnominal Phrases
Hiroyuki SAKAI Shigeru MASUYAMA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2003/09/01
Vol. E86-D  No. 9  pp. 1710-1718
Type of Manuscript:  Special Section PAPER (Special Issue on Text Processing for Information Access)
Category: 
Keyword: 
abbreviation of multiple adnominal phrasescorpussummarizationmutual information
 Summary | Full Text:PDF

Development of K-Band Front-End Devices for Broadband Wireless Communication Systems Using Millimeter-Wave Flip-Chip IC Technology
Kazuaki TAKAHASHI Suguru FUJITA Hiroyuki YABUKI Takayuki YOSHIDA Yoshito IKEDA Hiroyuki SAKAI Morikazu SAGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/06/25
Vol. E81-C  No. 6  pp. 827-833
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Module Technology)
Category: Functional Modules and the Design Technology
Keyword: 
flip-chipmicro bump bondingmillimeter-waveHFETHBT
 Summary | Full Text:PDF

High Frequency Flip-Chip Bonding Technologies and Their Application to Microwave/Millimeter-Wave ICs
Hiroyuki SAKAI Takayuki YOSHIDA Morikazu SAGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1998/06/25
Vol. E81-C  No. 6  pp. 810-818
Type of Manuscript:  INVITED PAPER (Special Issue on Microwave and Millimeter-Wave Module Technology)
Category: Functional Modules and the Design Technology
Keyword: 
flip-chipbumpHIC (Hybrid IC)microwavemillimeter-wave
 Summary | Full Text:PDF

A Novel Millimeter-Wave IC on Si Substrate Using Flip-Chip Bonding Technology
Hiroyuki SAKAI Yorito OTA Kaoru INOUE Takayuki YOSHIDA Kazuaki TAKAHASHI Suguru FUJITA Morikazu SAGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/08/25
Vol. E78-C  No. 8  pp. 971-978
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
millimeter-waveflip-chipIC (Integrated Circuit)microstrip linebump
 Summary | Full Text:PDF

Low-Power Technology for GaAs Front-End ICs
Tadayoshi NAKATSUKA Junji ITOH Kazuaki TAKAHASHI Hiroyuki SAKAI Makoto TAKEMOTO Shinji YAMAMOTO Kazuhisa FUJIMOTO Morikazu SAGAWA Osamu ISHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/04/25
Vol. E78-C  No. 4  pp. 430-435
Type of Manuscript:  Special Section PAPER (Special Issue on Low-Voltage, Low-Power Integrated Circuits)
Category: Analog Circuits
Keyword: 
mobile communicationfront-enddown-converterup-converterGaAs IChybrid IClow-power consumption
 Summary | Full Text:PDF

Double Self-Aligned Contact Technology for Shielded Bit Line Type Stacked Capacitor Cell of 16 MDRAM
Masanori FUKUMOTO Yasushi NAITO Kazuhiro MATSUYAMA Hisashi OGAWA Koji MATSUOKA Takashi HORI Hiroyuki SAKAI Ichiro NAKAO Hisakazu KOTANI Hiroshi IWASAKI Michihiro INOUE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1991/04/25
Vol. E74-C  No. 4  pp. 818-826
Type of Manuscript:  Special Section PAPER (Special Issue on LSI Memories)
Category: DRAM
Keyword: 
 Summary | Full Text:PDF