Updated on 2023/12/26

 
SAKAMOTO Hiroshi
 
Scopus Paper Info  
Total Paper Count: 0  Total Citation Count: 0  h-index: 7

Citation count denotes the number of citations in papers published for a particular year.

Affiliation
Faculty of Computer Science and Systems Engineering Department of Artificial Intelligence
Job
Professor
External link

Research Interests

  • Compressed Index

  • Knowledge Discovery

  • Data Compression

Research Areas

  • Informatics / Intelligent informatics

Undergraduate Education

  • 1994.03   Kyushu University   Faculty of Science   Graduated   Japan

Post Graduate Education

  • 1998.03   Kyushu University   Graduate School, Division of Information Systems   Doctoral Program   Completed   Japan

Degree

  • Kyushu University  -  Doctor of Science   1998.12

Biography in Kyutech

  • 2022.04
    -
    2024.03
     

    Kyushu Institute of Technology   Faculty of Computer Science and Systems Engineering  

  • 2020.04
    -
    2022.03
     

    Kyushu Institute of Technology   Faculty of Computer Science and Systems Engineering  

  • 2017.04
    -
    2018.03
     

    Kyushu Institute of Technology   School of Computer Science and Systems Engineering  

  • 2017.04
    -
    2018.03
     

    Kyushu Institute of Technology   Faculty of Computer Science and Systems Engineering  

  • 2013.04
     

    Kyushu Institute of Technology   Faculty of Computer Science and Systems Engineering   Department of Artificial Intelligence   Professor  

  • 2008.04
    -
    2013.03
     

    Kyushu Institute of Technology   Faculty of Computer Science and Systems Engineering   Department of Artificial Intelligence   Associate Professor  

  • 2007.04
    -
    2008.03
     

    Kyushu Institute of Technology   School of Computer Science and Systems Engineering   Associate Professor  

  • 2003.08
    -
    2007.03
     

    Kyushu Institute of Technology   School of Computer Science and Systems Engineering   Associate Professor (as old post name)  

▼display all

Biography before Kyutech

  • 2009.10 - 2013.03   JST   JST PRESTO researcher   Japan

  • 2002.06 - 2003.05   ニューサウスウェールズ大学   文部科学省在外研究員   Australia

  • 1999.01 - 2003.07   Kyushu University   Research Assistant   Japan

  • 1996.04 - 1998.12   Japan Society for the Promotion of Science (JSPS)   Special researcher of the Japan Society for the Promotion of Science   Japan

Academic Society Memberships

  • 2010.04   1st International Workshop on Social Networks and Social Media Mining on the Web   Japan

  • 2007.04   日本データベース学会   Japan

  • 2004.04   The institue of electronics, information and communication engineers (IEICE)   Japan

  • 2003.04   The Japanese Society for Artificial Intelligence   Japan

  • 2003.04 - 2008.03   Information Processing Society of Japan (IPSJ)   Japan

Papers

  • Privacy-Preserving Feature Selection with Fully Homomorphic Encryption Reviewed International journal

    Shinji Ono, Jun Takata, Masaharu Kataoka, Tomohiro I , Kilho Shin, Hiroshi Sakamoto

    Algorithms ( MDPI )   15 ( 7 )   229   2022.06

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.3390/a15070229

    DOI: 10.3390/a15070229

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    Other Link: https://www.mdpi.com/1999-4893/15/7/229

  • A Compression-Based Multiple Subword Segmentation for Neural Machine Translation Reviewed International journal

    Nonaka K., Yamanouchi K., I T., Okita T., Shimada K., Sakamoto H.

    Electronics (Switzerland)   11 ( 7 )   1014   2022.03

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.3390/electronics11071014

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  • RePair in Compressed Space and Time Reviewed

    Sakai K., Ohno T., Goto K., Takabatake Y., I T., Sakamoto H.

    Data Compression Conference Proceedings   2019-March   518 - 527   2019.05

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/DCC.2019.00060

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  • A faster implementation of online RLBWT and its application to LZ77 parsing Reviewed

    Ohno T., Sakai K., Takabatake Y., I T., Sakamoto H.

    Journal of Discrete Algorithms   52-53   18 - 28   2018.09

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1016/j.jda.2018.11.002

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  • Practical Random Access to SLP-Compressed Texts Reviewed

    Gagie T., I T., Manzini G., Navarro G., Sakamoto H., Seelbach Benkner L., Takabatake Y.

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   12303 LNCS   221 - 231   2020.09

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-030-59212-7_16

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  • Faster privacy-preserving computation of edit distance with moves Reviewed International journal

    Yoshimoto Y., Kataoka M., Takabatake Y., Tomohiro I., Shin K., Sakamoto H.

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   12049 LNCS   308 - 320   2020.01

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-030-39881-1_26

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  • Rpair: Rescaling RePair with Rsync Reviewed

    Gagie T., I T., Manzini G., Navarro G., Sakamoto H., Takabatake Y.

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   11811 LNCS   35 - 44   2019.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-030-32686-9_3

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  • LZ-ABT: A practical algorithm for α-balanced grammar compression Reviewed

    Ohno T., Goto K., Takabatake Y., I T., Sakamoto H.

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   10979 LNCS   323 - 335   2018.07

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-319-94667-2_27

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  • Approximate frequent pattern discovery in compressed space Reviewed

    FUKUNAGA Shouhei, TAKABATAKE Yoshimasa, I Tomohiro, SAKAMOTO Hiroshi

    IEICE Transactions on Information and Systems ( The Institute of Electronics, Information and Communication Engineers )   E101D ( 3 )   593 - 601   2018.03

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    <p>A grammar compression is a restricted context-free grammar (CFG) that derives a single string deterministically. The goal of a grammar compression algorithm is to develop a smaller CFG by finding and removing duplicate patterns, which is simply a frequent pattern discovery process. Any frequent pattern can be obtained in linear time; however, a huge working space is required for longer patterns, and the entire string must be preloaded into memory. We propose an <i>online</i> algorithm to address this problem approximately within compressed space. For an input sequence of symbols, <i>a</i><sub>1</sub>,<i>a</i><sub>2</sub>,..., let <i>G<sub>i</sub></i> be a grammar compression for the string <i>a</i><sub>1</sub><i>a</i><sub>2</sub>…<i>a<sub>i</sub></i>. In this study, an online algorithm is considered one that can compute <i>G</i><sub><i>i</i>+1</sub> from (<i>G<sub>i</sub></i>,<i>a</i><sub><i>i</i>+1</sub>) without explicitly decompressing <i>G<sub>i</sub></i>. Here, let <i>G</i> be a grammar compression for string <i>S</i>. We say that variable <i>X</i> approximates a substring <i>P</i> of <i>S</i> within approximation ratio <i>δ</i> iff for any interval [<i>i</i>,<i>j</i>] with <i>P</i>=<i>S</i>[<i>i</i>,<i>j</i>], the parse tree of <i>G</i> has a node labeled with <i>X</i> that derives <i>S</i>[<i>l</i>,<i>r</i>] for a subinterval [<i>l</i>,<i>r</i>] of [<i>i</i>,<i>j</i>] satisfying |[<i>l</i>,<i>r</i>]|≥<i>δ</i>|[<i>i</i>,<i>j</i>]|. Then, <i>G</i> solves the frequent pattern discovery problem approximately within <i>δ</i> iff for any frequent pattern <i>P</i> of <i>S</i>, there exists a variable that approximates <i>P</i> within <i>δ</i>. Here, <i>δ</i> is called the approximation ratio of <i>G</i> for <i>S</i>. Previously, the best approximation ratio obtained by a polynomial time algorithm was Ω(1/lg<sup>2</sup>|<i>P</i>|). The main contribution of this work is to present a new lower bound Ω(1/<<sup>*</sup>|<i>S</i>|lg|<i>P</i>|) that is smaller than the previous bound when lg<sup>*</sup>|<i>S</i>|<lg|<i>P</i>|. Experimental results demonstrate that the proposed algorithm extracts sufficiently long frequent patterns and significantly reduces memory consumption compared to the offline algorithm in the previous work.</p>

    DOI: 10.1587/transinf.2017FCP0010

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  • A faster implementation of online run-length burrows-wheeler transform Reviewed International journal

    Ohno T., Takabatake Y., I T., Sakamoto H.

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   10765 LNCS   409 - 419   2018.01

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    DOI: 10.1007/978-3-319-78825-8_33

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  • Privacy-Preserving String Edit Distance with Moves Reviewed

    Nakagawa S., Sakamoto T., Takabatake Y., I T., Shin K., Sakamoto H.

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   11223 LNCS   226 - 240   2018.01

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-030-02224-2_18

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  • A space-optimal grammar compression Reviewed International journal

    Takabatake Y., I T., Sakamoto H.

    Leibniz International Proceedings in Informatics, LIPIcs   87   2017.09

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    DOI: 10.4230/LIPIcs.ESA.2017.67

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  • A Space-Optimal Grammar Compression Reviewed

    Yoshimasa Takabatake, Tomohiro I, and Hiroshi Sakamoto

    Proc. The 25th Annual European Symposium on Algorithms   to appear   2017.09

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    Austria   Vienna   2017.09.04  -  2017.09.08

  • Calculation of Distance between String based Bit-decomposition Protocol

    NAKAGAWA Shunta, SAKAMOTO Tokio, SHIN Yoshihiro, SAKAMOTO Hiroshi

    JSAI Technical Report, SIG-FPAI ( The Japanese Society for Artificial Intelligence )   104 ( 0 )   04   2017.08

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    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)

    DOI: 10.11517/jsaifpai.104.0_04

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  • A Faster Implementation of Online Run-Length Burrows-Wheeler Transform Reviewed

    Tatsuya Ohno, Yoshimasa Takabatake, Tomohiro I and Hiroshi Sakamoto

    Proceeding of 28th Internal Workshop on Combinatorial Algorithms (IWOCA2017)   to appear   2017.07

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    Australia   Newcastle   2017.07.17  -  2017.07.21

  • Stream-based Lossless Data Compression Hardware using Adaptive Frequency Table Management Reviewed

    9495   1 - 14   2016.08

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    DOI: 10.1007/978-3-319-29006-5_11

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  • Online Grammar Compression for Frequent Pattern Discovery

    FUKUNAGA Shouhei, TAKABATAKE Yoshimasa, I Tomohiro, SAKAMOTO Hiroshi

    JSAI Technical Report, SIG-FPAI ( The Japanese Society for Artificial Intelligence )   101 ( 0 )   06   2016.08

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    DOI: 10.11517/jsaifpai.101.0_06

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  • siEDM: An efficient string index and search algorithm for edit distance with moves Reviewed

    Takabatake Y., Nakashima K., Kuboyama T., Tabei Y., Sakamoto H.

    Algorithms   9 ( 2 )   2016.06

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    DOI: 10.3390/a9020026

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  • Online Grammar Compression by Constant Space Item Counting

    JSAI Technical Report, SIG-FPAI ( The Japanese Society for Artificial Intelligence )   100 ( 0 )   15   2016.03

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    DOI: 10.11517/jsaifpai.100.0_15

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  • Application to a big database of similarity calculation using the grammar compression

    ONISHI Takanori, KUBOYAMA Tetsuji, SAKAMOTO Hiroshi

    JSAI Technical Report, SIG-FPAI ( The Japanese Society for Artificial Intelligence )   100 ( 0 )   18   2016.03

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    DOI: 10.11517/jsaifpai.100.0_18

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  • Space-Efficient Reverse Dictionary for Grammar Compression

    FUKUNAGA Shouhei, SAKAMOTO Hiroshi

    JSAI Technical Report, SIG-FPAI ( The Japanese Society for Artificial Intelligence )   100 ( 0 )   02   2016.03

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    DOI: 10.11517/jsaifpai.100.0_02

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  • ストリームデータからの頻出パターンの近似発見

    青山 友紀, 高畠 嘉将, 坂本 比呂志

    人工知能学会研究会資料 人工知能基本問題研究会 ( 一般社団法人 人工知能学会 )   99 ( 0 )   21   2016.01

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    DOI: 10.11517/jsaifpai.99.0_21

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  • 文法圧縮のハッシュ領域の削減

    水野 仁人, 高畠 嘉将, 坂本 比呂志

    人工知能学会研究会資料 人工知能基本問題研究会 ( 一般社団法人 人工知能学会 )   99 ( 0 )   05   2016.01

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    DOI: 10.11517/jsaifpai.99.0_05

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  • Lazy management for frequency table on hardware-based stream lossless data compression Reviewed International journal

    Marumo K., Yamagiwa S., Morita R., Sakamoto H.

    Information (Switzerland)   7 ( 4 )   2016.01

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    DOI: 10.3390/info7040063

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  • Online Grammar Compression for Frequent Pattern Discovery Reviewed

    井 智弘, 坂本 比呂志

    ICGI 2016   -   93 - 104   2016.01

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  • Online Self-Indexed Grammar Compression Reviewed

    9309   258 - 269   2015.09

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    DOI: 10.1007/978-3-319-23826-5_25

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  • Finding ambiguous patterns on grammar compressed string Reviewed

    9067   331 - 339   2015.01

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-662-48119-6_25

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  • Workshop on graph-based algorithms for big data and its applications (GABA2014) Reviewed

    9067   293 - 295   2015.01

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    DOI: 10.1007/978-3-662-48119-6_21

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  • An Extension of Community Extraction Algorithm on Bipartite Graph Reviewed

    4 ( 4 )   30 - 34   2014.12

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

  • Online Pattern Matching for String Edit Distance with Moves Reviewed

    21th International Symposium on String Processing and Information Retrieval   2014.10

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    DOI: 10.1007/978-3-319-11918-2

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  • Grammar Compression: Grammatical Inference by Compression and Its Application to Real Data Invited Reviewed

    Hiroshi Sakamoto

    12th International Conference on Grammatical Inference (ICGI2014, 2014-9)   3 - 20   2014.09

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  • Improved ESP-index: A Practical Self-index for Highly Repetitive Texts Reviewed

    13th International Symposium on Experimental and Efficient Algorithms   2014.06

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    DOI: 10.1007/978-3-319-07959-2_29

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  • Truss Decomposition for Extracting Communities in Bipartite Graph Reviewed

    Y. Li, T. Kuboyama, H. Sakamoto

    The Third International Conference on Advances in Information Mining and Management (IMMM2013)   2013.11

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  • Scalable Pattern Discovery on Knot Theory Reviewed

    Workshop on Data Discretization and Segmentation for Knowledge Discovery (DDS 2013)   2013.10

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  • An Implementation of Truss Decomposition of Bipartite Graph Reviewed

    Y. Li, T. Kuboyama, H. Sakamoto

    Workshop on Data Discretization and Segmentation for Knowledge Discovery (DDS2013)   2013.10

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  • Fully-Online Grammar Compression Reviewed

    S. Maruyama, Y. Tabei, H. Sakamoto, K. Sadakane

    20th International Symposium on String Processing and Information Retrieval (SPIRE2013)   218 - 229   2013.10

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    DOI: 10.1007/978-3-319-02432-5_25

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  • A Reconfigurable Stream Compression Hardware based on Static Symbol-Lookup Table Reviewed

    S. Yamagiwa, H. Sakamoto

    The First Workshop on Benchmarks, Performance Optimization, and Emerging hardware of Big Data Systems and Applications (BPOE 2013)   86 - 93   2013.10

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    DOI: 10.1109/BigData.2013.6691702

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  • Pattern extraction from graphs and beyond Reviewed

    24   115 - 145   2013.09

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    DOI: 10.1007/978-3-319-00372-6J7

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  • A Succinct Grammar Compression Reviewed

    Y. Tabei, Y. Takabatake, H. Sakamoto

    24th Annual Symposium on Combinatorial Pattern Matching (CPM2013)   235 - 246   2013.06

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-642-38905-4_23

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  • Mining Twitter Data: Discover Quasi-Truss from Bipartite Graph Reviewed

    Yanting Li, Tetsuji Kuboyama, Hiroshi Sakamoto

    5th International Conference on Intelligent Decision Technologies   287 - 295   2013.06

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.3233/978-1-61499-264-6-287

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  • Scalable Detection of Frequent Substrings by Grammar-Based Compression Reviewed

    E96-D ( 3 )   457 - 464   2013.03

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1587/transinf.E96.D.457

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  • ESP-Index: A Compressed Index Based on Edit-Sensitive Parsing Reviewed

    18   100 - 112   2013.01

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1016/j.jda.2012.07.009

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  • Variable-length codes for space-efficient grammar-based compression Reviewed

    7608 LNCS   398 - 410   2012.10

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1007/978-3-642-34109-0-42

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  • An online algorithm for lightweight grammar-based compression Reviewed

    19 - 28   2011.11

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    Language:English   Publishing type:Research paper (international conference proceedings)

    DOI: 10.1109/CCP.2011.40

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  • An Online Algorithm for Lightweight Compression of Highly Repetitive Text Reviewed

    2011.04

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  • Predicting Mutation Trend of Influenza A Virus through Dimensionality Reduction in Hamming Metric on HA Amino Acid Sequences Reviewed

    T.Kuboyama,K.Ito,K.Hirata,H.Sakamoto

    Annual International Conference on Bioinformatics and Computational Biology   2011.03

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    2011.02.28  -  2011.03.01

  • An improved algorithm for extracting research communities from bibliographic data Reviewed

    Y.Nakamura,T.Horiike,Y.Taira,Hiroshi Sakamoto

    DASFAA workshop   338 - 345   2010.04

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    2010.04.01  -  2010.04.04

    DOI: 10.1007/978-3-642-14589-6_34

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  • Context-sensitive grammar transform: compression and pattern matching Reviewed

    S.Maruyama,Y.Tanaka,H.Sakamoto,M.Takeda

    IEICE Trans. on Information and Systems   2010.04

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    DOI: 10.1587/transinf.E93.D.219

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  • データ圧縮の理論に基づく効率的な索引構造 Reviewed

    多比良嘉成,岸上直也,田中洋平,坂本比呂志

    日本データベース学会論文誌   8 ( 3 )   7 - 12   2010.01

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    主要雑誌 代表的研究業績

  • Extracting Research Communities by Improved Maximum Flow Algorithm Reviewed

    Toshihiko Horiike,Youhei Takahashi,Tetsuji Kuboyama,Hiroshi Sakamoto

    Proc. 13th International Conference on Knowledge-Based and Intelligent Information & Engineering Systems   2009.09

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    2009.09  -  2009.09

  • A Space-Saving Approximation Algorithm for Grammar-Based Compression Reviewed

    Hiroshi Sakamoto,Shirou Maruyama,Takuya Kida,Shinichi Shimozono

    IEICE Trans. on Information and Systems   E92-D ( 2 )   158 - 165   2009.04

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  • 有向グラフ上の最短経路問題に対する効率的な索引付け Reviewed

    原口新平,中村有作,坂本比呂志

    日本データベース学会論文誌   7 ( 1 )   211 - 214   2008.04

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    代表的研究業績

  • 有向グラフ上の到達可能性のための索引構造と大規模XMLデータベースへの応用 Reviewed

    中村有作,原口新平,舞田哲哉,坂本 比呂志

    電子情報通信学会論文誌Vol.J91-D,No.9,pp.2217-2224.   J91-D ( 9 )   2217 - 2224   2008.04

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    主要雑誌 代表的研究業績

  • Context-Sensitive Grammar Transform: Compression and Pattern Matching Reviewed

    Shirou Maruyama,Youhei. Tanaka,Hiroshi. Sakamoto,Masayuki. Takeda

    Proc. 15th String Processing and Information Retrieval Symposium   27 - 38   2008.04

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    Australia   2008.04  -  2008.04

  • Move as Multi-Dominance and Graph-Theoretical Linearization Reviewed

    Takashi Toyoshima,Hiorshi Sakamoto

    Proc. 3rd Brussels Conference on Generative Linguistics   53 - 55   2008.04

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    Belgium   2008.04  -  2008.04

  • 高速な到達可能性判定のための規模耐性の高い索引付け Reviewed

    中村有作,舞田哲哉,坂本比呂志

    DBSJ Letters   6 ( 1 )   77 - 80   2007.06

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    代表的研究業績

  • 参照構造を持つXML上の高速な到達可能性判定 Reviewed

    中村有作,舞田哲哉,坂本 比呂志

    人工知能学会論文誌   22 ( 2 )   191 - 199   2007.04

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    主要雑誌 代表的研究業績

  • Efficient Reachability Test on Directed Graphs and Its Application to Large XML Data Reviewed

    Yuusaku Nakamura,Tetsuya Maita,Hiroshi Sakamoto

    Proc. 3rd IEEE International Workshop on Databases for Next-Generation Researchers   2007.04

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    Turkey   2007.04  -  2007.04

  • 木構造データに対するカーネル関数の設計と解析 Reviewed

    鹿島久嗣,坂本比呂志,小柳光生

    人工知能学会論文誌   21 ( 1 )   113 - 121   2006.04

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    主要雑誌 代表的研究業績

  • Improving Time and Space Complexity for Compressed Pattern Matching Reviewed

    Shirou Maruyama,Hiromitsu Miyagawa,Hiroshi Sakamoto

    Proc. 17th International Symposium on Algorithms and Computation   484 - 493   2006.04

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    2006.04  -  2006.04

  • Fast Reachability Test on DAGs for XML Reviewed

    Yusaku Nakamura,Tetsuya Maita,Hiroshi Sakamoto

    Proc. International Workshop on Data-Mining and Statistical Science   151 - 158   2006.04

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    2006.04  -  2006.04

    代表的研究業績

  • A Fully Linear-Time Approximation Algorithm for Grammar-Based Compression Reviewed

    Journal of Discrete Algorithms   3 ( 1 )   416 - 430   2005.09

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  • A Simple Extension of Queriable Compression for XML Data Reviewed

    Tetsuya Maita,Hiroshi Sakamoto

    Proc. of the 2005 International Conference on Active Media Technology (AMT2005)   91 - 95   2005.04

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    2005.04  -  2005.04

  • Efficient Substructure Discovery from Large Semi-structured Data Reviewed

    T. Asai,K. Abe,S. Kawasoe,H. Sakamoto,H. Arimura,S. Arikawa

    IEICE Transactions on Information and Systems   E87-D ( 12 )   2754 - 2763   2004.04

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  • A Space-Saving Linear-Time Algorithm for Grammar-Based Compression Reviewed

    Hiroshi Sakamoto,Takuya Kida,Shinichi Shimozono

    Proc. 11th International Symposium on String Processing and Information Retrieval (SPIRE 2004)   218 - 229   2004.04

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    2004.04  -  2004.04

  • 最適データ圧縮のための省スペースな近似アルゴリズム Reviewed

    坂本 比呂志

    情報技術レターズ   29 - 30   2003.04

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    代表的研究業績

  • Learning Elementary Formal Systems with Queries Reviewed

    Hiroshi Sakamoto,Kouichi Hirata,Hiroki Arimura

    Theoretical Computer Science   298   21 - 50   2003.04

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  • A Fully Linear-Time Approximation Algorithm for Grammar-Based Compression Reviewed

    Proc. 14th Annual Symposium on Combinatorial Pattern Matching (CPM 2003)   348 - 360   2003.04

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    2003.04  -  2003.04

  • Efficiently Mining Frequent Substructures from Semi-structured Data Reviewed

    Tatsuya Asai,Kenji Abe,Shinji Kawasoe,Hiroshi Sakamoto,Hiroki Arimura,Setsuo Arikawa

    Proc. International Workshop on Informations & Electrical Engineering (IWIE2002)   59 - 64   2002.04

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    2002.04  -  2002.04

  • Knowledge Discovery from Semistructured Texts Reviewed

    Hiroshi Sakamoto,Hiroki Arimura,Setsuo Arikawa

    Progress in Discovery Science - Final Report of the Japanese Discovery Science Project   586 - 599   2002.04

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    2002.04  -  2002.04

  • Efficient Substructure Discovery from Large Semi-structured Data Reviewed

    Tatsuya Asai,Kenji Abe,Shinji Kawasoe,Hiroki Arimura,Hiroshi Sakamoto,Setsuo Arikawa

    Proc. 2nd SIAM International Conference on Data Mining (SDM'02)   158 - 174   2002.04

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    2002.04  -  2002.04

  • Efficient Data Mining from Large Text Databases Reviewed

    Hiroki Arimura,Hiroshi Sakamoto,Setsuo Arikawa

    Progress in Discovery Science - Final Report of the Japanese Discovery Science Project   123 - 139   2002.04

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    2002.04  -  2002.04

  • Mining Frequent Substructures from Web Reviewed

    Kenji Abe,Shinji Kawasoe,Tatsuya Asai,Hiroki Arimura,Hiroshi Sakamoto,Setsuo Arikawa

    Active Mining - New Directions of Data Mining   79   83 - 94   2002.04

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    2002.04  -  2002.04

  • HTMLからのテキストの自動切り出しアルゴリズムと実装 Reviewed

    村上義継,坂本比呂志,有村博紀,有川節夫

    情報処理学会論文誌:数理モデル化と応用   42 ( SIG14-006 )   39 - 49   2001.04

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    代表的研究業績

  • Mining Semi-Structured Data by Path Expressions Reviewed

    Katsuaki Taniguchi,Hiroshi Sakamoto,Hiroki Arimura,Sinich Simozono,Setsuo Arikawa

    Proc. 4th International Conference on Discovery Science   378 - 388   2001.04

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    2001.04  -  2001.04

  • Prediction-Preserving Reducibility with Membership Queries on Formal Languages Reviewed

    Kouichi Hirata,Hiroshi Sakamoto

    Proc. 13th International Symposium on Fundamentals of Computer Theory   172 - 183   2001.04

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    2001.04  -  2001.04

  • Extracting Partial Structures from HTML Documents Reviewed

    Hiroshi Sakamoto,Hiroki Arimura,Setsuo Arikawa

    Proc. 14th International FLAIRS Conference: Knowledge Discovery and Data Mining   264 - 268   2001.04

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    2001.04  -  2001.04

  • Efficient Discovery of Proximity Patterns with Suffix Arrays Reviewed

    Hiroki Arimura,Hiroki Asaka,Hiroshi Sakamoto,Setsuo Arikawa

    Proc. 12th Annual Symposium on Combinatorial Pattern Matching   152 - 156   2001.04

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    2001.04  -  2001.04

  • Efficient Learning of Semi-Structured Data from Queries Reviewed

    Hiroki Arimura,Hiroshi Sakamoto,Setsuo Arikawa

    Proc. 12th International Conference on Algorithmic Learning Theory   315 - 331   2001.04

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    2001.04  -  2001.04

  • Intractability of decision problems for finite-memory automata Reviewed

    Theoretical Computer Science   231   297 - 308   2000.04

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  • Learning Term Rewriting Systems from Entailment Reviewed

    Hiroki Arimura,Hiroshi Sakamoto,Setsuo Arikawa

    10th International Conference on Inductive Logic Programming (ILP2000)   2000.04

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    2000.04  -  2000.04

  • Text Data Mining: Discovery of Important Keywords in the Cyberspace Reviewed

    Hiroki Arimura,Jun-ichiro Abe,Ryoichi Fujino,Hiroshi Sakamoto,Shinichi Shimozono,Setsuo Arikawa

    Proc. 2000 Kyoto International Conference on Digital Libraries: Research and Practice   121 - 126   2000.04

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    2000.04  -  2000.04

  • Identification of Tree Translation Rules from Examples Reviewed

    Hiroshi Sakamoto,Hiroki Arimura,Setsuo Arikawa

    Proc. 5th International Colloquium on Grammatical Inference   241 - 255   2000.04

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    2000.04  -  2000.04

  • The learnability of simple deterministic finite-memory automata via queries Reviewed

    Bulletin of Informatics and Cybernetics   30 ( 1 )   93 - 108   1998.04

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  • Intractability of Decision Problems for Finite-Memory Automata Reviewed

    Hiroshi Sakamoto,Daisuke Ikeda

    Proc. 2nd International Conference on Universal Machines and Computations   II   58 - 74   1998.04

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    1998.04  -  1998.04

  • Finding a One-Variable Pattern from Incomplete Data Reviewed

    Proc. 9th International Conference on Algorithmic Learning Theory   234 - 246   1998.04

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    1998.04  -  1998.04

  • Learning Simple Deterministic Finite-Memory Automata Reviewed

    Proc. 8th International Workshop on Algorithmic Learning Theory   416 - 431   1997.04

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    1997.04  -  1997.04

  • Language Learning from Membership Queries and Characteristic Examples Reviewed

    Proc. 6th International Workshop on Algorithmic Learning Theory   55 - 65   1995.04

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    1995.04  -  1995.04

▼display all

Publications (Books)

  • Sublinear Computation Paradigm Algorithmic Revolution in the Big Data Era

    Yoshimasa Takabatake, Tomohiro I, and Hiroshi Sakamoto(Contributor)

    Springer  2021.10  ( ISBN:978-981-16-4095-7

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    Total pages:403   Responsible for pages:16   Language:English

  • Big Data Management

    Shigeru Shimada et al.(Joint author)

    NTS  2014.03  ( ISBN:978-4-8646-9084-3

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    Language:Japanese

  • Multimedia Services in Intelligent Environments

    Hiroshi Sakamoto and Tetsuji Kuboyama(Joint author)

    Springer  2013.03  ( ISBN:978-3-319-00371-9

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    Language:English

Conference Prsentations (Oral, Poster)

  • PCA-based Extraction of Foreground Images from Textile Printing Stencils

    Yasuhiro Hamada, Hiroshi Sakamoto

    SAES2022 

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    Event date: 2022.12.12 - 2022.12.14   Language:English  

  • Implementation of Load-Balancing Succinct B Tree

    Sohei Yamaguchi, Tomohiro I, Hiroshi Sakamoto

    SAES2022 

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    Event date: 2022.12.12 - 2022.12.14   Language:English  

  • Privacy-Preserving Multivalued Feature Selection with Fully Homomorphic Encryption

    Shinji Ono, Jun Takata, Masaharu Kataoka, Tomohiro I,Kilho Shin and Hiroshi Sakamoto

    SAES2022 

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    Event date: 2022.12.12 - 2022.12.14   Language:English  

  • Neural machine translation using subword segmentation with probabilistic locally consistent parsing

    Keita Nonaka, Hiroshi Sakamoto

    SAES2021 

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    Event date: 2021.12.05 - 2021.12.08   Language:English  

  • Secure computing of eigenvalues and eigenvectors using fully homomorphic encryption

    Kanta Moriyama, Hiroshi Sakamoto

    SAES2021 

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    Event date: 2021.12.05 - 2021.12.08   Language:English  

  • Evaluating the execution time of an efficient multiparty sorting protocol on TFHE

    Jun Takata, Hiroshi Sakamoto

    SAES2021 

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    Event date: 2021.12.05 - 2021.12.08   Language:English  

  • JPEGの画像表現を用いた画像生成の高速化

    大北 剛, 管谷克彦, 坂本 比呂志

    IBIS2021  電子情報通信学会 情報論的学習理論と機械学習研究会

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    Event date: 2021.11.10 - 2021.11.13   Language:English  

  • Faster Image Generation straight from Compressed Data

    Katsuhiko Sugaya, Yoshimasa Takabatake, Tomohiro I, Yoshihiro Shin and Hiroshi Sakamoto

    International Symposium on Applied Engineering and Sciences 

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    Event date: 2020.12.12 - 2020.12.19   Language:English  

  • 非可逆圧縮データからの高速な画像生成

    管谷 克彦, 高畠 嘉将, 井 智弘, 申 吉浩, 坂本 比呂志

    IBIS2020  電子情報通信学会 情報論的学習理論と機械学習研究会

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    Event date: 2020.11.23 - 2020.11.26   Language:Japanese  

    画素値の代わりにJPEGの離散コサイン変換(DCT)係数を入力とすることでCNNによる画像分類を高速化できることが知られている (NIPS2018).しかし,DCT係数は冗長性の観点で改良の余地がある.本研究では,このモデルを画像生成へ拡張し,冗長性を削減したDCT係数からの画像生成が可能であることを示す.実験では,MNISTで通常の手法に対し7倍から9倍の高速化が達成できたことを確認した.但し,生成画像の画質の改善が今後の課題である.

  • 移動付き編集距離に基づく曖昧検索が可能な圧縮索引

    中島 健太,前田 幸司,高畠 嘉将,坂本 比呂志

    第97回 SIG-FPAI研究会 

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    Event date: 2015.03.22   Language:Japanese  

  • 移動付き編集距離のオンラインパターンマッチング

    高畠 嘉将,田部井 靖生,坂本 比呂志

    第97回 SIG-FPAI研究会 

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    Event date: 2015.03.22   Language:Japanese  

  • 文法圧縮に基づく自己索引のオンライン構築について

    高畠 嘉将,田部井 靖生,坂本 比呂志

    第96回 SIG-FPAI研究会 

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    Event date: 2015.01.13   Language:Japanese  

  • 文法圧縮を応用したハミング距離計算の高速化

    前田幸司, 高畠嘉将, 田部井靖生, 坂本比呂志

    第95回 SIG-FPAI研究会 

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    Event date: 2014.10.10   Language:Japanese  

  • 乱択アルゴリズムを用いた頻出文字列の近似数え上げに基づく省スペース文法圧縮

    宮木 亮洋,坂本 比呂志

    第94回 SIG-FPAI研究会 

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    Event date: 2014.07.24   Language:Japanese  

  • 文法圧縮を応用したハミング距離の短い文字列列挙アルゴリズム

    前田幸司,高畠嘉将,田部井靖生,坂本比呂志

    第94回 SIG-FPAI研究会 

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    Event date: 2014.07.24   Language:Japanese  

  • 頻度情報に基づく省スペースなオンライン文法圧縮

    前田幸司, 高畠嘉将, 坂本比呂志

    第92回 SIG-FPAI研究会 

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    Event date: 2014.01.30   Language:Japanese  

  • 文法圧縮に基づく自己索引の省スペース化

    高畠嘉将, 坂本比呂志

    第90回 SIG-FPAI研究会 

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    Event date: 2013.07.18   Language:Japanese  

  • Mining Twitter Data: Discover Quasi-Truss from Bipartite Graph

    Yanting Lee, Mirei Matsumoto, Hiroshi Sakamoto

    第88回 SIG-FPAI研究会 

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    Event date: 2013.01.24   Language:English  

  • 文法圧縮の最適な符号化

    高畠嘉将,田部井靖生,坂本比呂志

    第88回 SIG-FPAI研究会 

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    Event date: 2013.01.24   Language:Japanese  

  • 単調列の発見に基づく文法圧縮の符号化

    前田幸司,宮木亮洋,坂本比呂志

    第88回 SIG-FPAI研究会 

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    Event date: 2013.01.24   Language:Japanese  

  • The Implementation of Triangle Counting Based on Random Sampling

    Yanting Lee, Hiroshi Sakamoto

    第86回 SIG-FPAI研究会 

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    Event date: 2012.08.09   Language:English  

  • 大規模グラフから抽出したコミュニティの階層化

    松本美玲, 山抱由依, 久保山哲二

    第86回 SIG-FPAI研究会 

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    Event date: 2012.08.09   Language:Japanese  

  • BOOLアルゴリズムとSIFT特徴量を利用した文書画像からの頻出キーワード発見

    高岡拓真,坂本 比呂志

    第86回 SIG-FPAI研究会 

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    Event date: 2012.08.09   Language:Japanese  

  • 大規模ネットワークデータ分析のためのデータ圧縮ツール

    松本 美玲

    第85回 SIG-FPAI研究会 

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    Event date: 2012.02.02 - 2012.02.03   Language:Japanese  

  • 文法型圧縮法の全二分木表現による符号化とランダムアクセス手法の提案

    丸山史郎

    第134回アルゴリズム研究会 

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    Event date: 2011.03.07   Language:Japanese  

  • 文法型圧縮法の全二分木表現による符号化とランダムアクセス手法の提案”

    第134回アルゴリズム研究会 

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    Event date: 2011.03   Language:Japanese  

  • 長い部分文字列を検索するための文法圧縮索引

    本人

    冬のLAシンポジウム 

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    Event date: 2011.02   Language:Japanese  

  • 関連語の自動選定による論文コミュニティ抽出技術の改良

    第81回 SIG-FPAI研究会 

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    Event date: 2011.02   Language:Japanese  

  • 文法圧縮に基づいた圧縮データの自己索引構造化の提案

    冬のLAシンポジウム 

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    Event date: 2011.02   Language:Japanese  

  • 長いパターンを検出するための文法圧縮に基づく索引構造

    第133回アルゴリズム研究会 

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    Event date: 2011.01   Language:Japanese  

  • 検索可能な文法圧縮の実現 ―文字列間類似度の高速計算―

    本人

    FIT2010イベント企画,ScienceとEngineering をつなぐ『Art』を求めて-ERATO湊離散構造処理系プロジェクトシンポジウム-ポスターセッション 

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    Event date: 2010.09   Language:Japanese  

  • Edit Sensitive Parsingを用いた文法圧縮に基づく省スペースな索引構造 -実験による評価-

    第78回SIG-FPAI研究会 

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    Event date: 2010.07   Language:Japanese  

  • Edit Sensitive Parsingを用いた文法圧縮に基づく省スペースな索引構造 -理論編-

    第78回SIG-FPAI研究会 

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    Event date: 2010.07   Language:Japanese  

  • データ圧縮によるパターン発見とメタ情報検索への応用

    本人

    情報処理学会50周年記念全国大会,JSTさきがけセッション 

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    Event date: 2010.03   Language:Japanese  

  • アルファベット還元による圧縮法の改良

    大津祐樹(情報科学専攻)

    第76回SIG-FPAI研究会 

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    Event date: 2010.01   Language:Japanese  

  • 圧縮データからの高速検索

    多比良嘉成(情報科学専攻)

    第76回SIG-FPAI研究会 

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    Event date: 2010.01   Language:Japanese  

  • データ圧縮の理論に基づく効率的な索引構造

    田中洋平(情報科学専攻)

    第1回データ工学と情報マネジメントに関するフォーラム 

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    Event date: 2009.03   Language:Japanese  

  • 辞書式データ圧縮による高速なパターン検索

    本人

    第71回SIG-FPAI研究会 

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    Event date: 2008.04   Language:Japanese  

  • 有向グラフの効率的なラベル付け

    本人

    夏のLAシンポジウム 

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    Event date: 2008.04   Language:Japanese  

  • グラフ上の高速な距離計算に基づく大規模半構造データからのパターン発見

    情報科学専攻 中村有作

    電子情報通信学会第19回データ工学ワークショップ予稿集 

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    Event date: 2008.03.09 - 2008.03.11   Language:Japanese  

  • 最終年度成果報告

    本人

    基盤研究A研究集会 

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    Event date: 2008.03.05 - 2008.03.06   Language:Japanese  

  • 有向グラフ上の最短距離の効率的な計算

    情報科学専攻 原口新平

    人工知能学会 第68回 人工知能基本問題研究会予稿集 

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    Event date: 2008.01.16 - 2008.01.17   Language:Japanese  

  • グラフ上の高速な距離計算に基づく大規模半構造データからのパターン発見

    本人

    基盤研究A研究集会 

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    Event date: 2007.12.20 - 2007.12.21   Language:Japanese  

  • 圧縮アルゴリズムLCA法の改良と実験による評価

    コンピュテーション研究会 

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    Event date: 2007.04   Language:Japanese  

  • DAG上の2HOPラベリングの大規模化

    筆頭著者:指導学生

    第66回SIG-FPAI研究会 

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    Event date: 2007.04   Language:Japanese  

  • DAG上の2HOPラベリングの効率的なメンテナンス

    筆頭著者:指導学生

    第66回SIG-FPAI研究会 

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    Event date: 2007.04   Language:Japanese  

  • 有向グラフ上の到達可能性判定のための索引構造と大規模XMLデータへの応用

    第18回データ工学ワークショップ 

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    Event date: 2007.04   Language:Japanese  

  • 有向グラフ上の到達可能性を判定するための索引構造とXMLデータへの応用

    第65回人工知能基本問題研究会 

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    Event date: 2007.03   Language:Japanese  

  • 有向グラフ上の接点間の関係を高速に判定するための索引付けとXMLへの応用

    本人

    基盤研究A「大規模半構造データからの高速知識発見システムの開発」研究集会 

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    Event date: 2007.03   Language:Japanese  

  • 圧縮アルゴリズムLCA法の改良と実装

    第65回人工知能基本問題研究会 

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    Event date: 2007.03   Language:Japanese  

  • 参照構造を持つXMLにおける高速な到達可能性の判定

    第63回人工知能基本問題研究会 

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    Event date: 2006.09   Language:Japanese  

  • 圧縮パターン照合アルゴリズムの改良

    第63回人工知能基本問題研究会 

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    Event date: 2006.09   Language:Japanese  

  • 圧縮文字列照合における計算量の理論的改善

    本人

    基盤研究A「大規模半構造データからの高速知識発見システムの開発」研究集会 

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    Event date: 2006.08   Language:Japanese  

  • 算術符号化を利用したXMLデータへの高速な問い合わせ処理の改良

    第17回データ工学ワークショップ 

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    Event date: 2006.04   Language:Japanese  

  • 算術符号化と範囲ラベルによるXMLデータベースの高速化

    本人

    基盤研究A「大規模半構造データからの高速知識発見システムの開発」研究集会 

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    Event date: 2006.02   Language:Japanese  

  • 半構造データからのパターン発見と高速検索のためのアルゴ リズムの開発

    本人

    基盤研究A「大規模半構造データからの高速知識発見システムの開発」研究集会 

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    Event date: 2005.10   Language:Japanese  

  • 半構造データの効率的な圧縮と問い合わせ処理への応用

    第1回Webインテリジェンスとインタラクション研究会 

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    Event date: 2005.02   Language:Japanese  

  • 省スペースな線形時間文法圧縮アルゴリズム

    本人

    コンピュテーション研究会 

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    Event date: 2004.09   Language:Japanese  

  • 省スペースな線形時間文法圧縮アルゴリズム

    本人

    夏のLAシンポジウム 

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    Event date: 2004.07   Language:Japanese  

  • 文脈自由文法による圧縮のための省スペースな近似アルゴリズム

    本人

    コンピュテーション研究会:文字列アルゴリズム特集 

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    Event date: 2004.01   Language:Japanese  

  • 最適データ圧縮のための省スペースな近似アルゴリズム

    情報技術フォーラムFIT2003  

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    Event date: 2003.09   Language:Japanese  

  • 文脈自由文法による文字列の圧縮

    Stringology Workshop 2003 

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    Event date: 2003.09   Language:Japanese  

  • 最適パターン発見に基づくWebマイニング

    情報論的学習理論ワークショップ 

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    Event date: 2002.09   Language:Japanese  

  • 頻出および最適パターンの発見に基づく半構造データマイニング

    2002年度人工知能学会全国大会 

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    Event date: 2002.05   Language:Japanese  

  • 最適パターン発見に基づくWebマイニング

    第5回情報論的学習理論ワークショップ(IBIS2002) 

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    Event date: 2002.04   Language:Japanese  

  • 半構造データからの頻出パターン発見アルゴリズム

    第13回データ工学ワークショップ 

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    Event date: 2002.04   Language:Japanese  

  • 文字列圧縮問題の近似可能性

    本人

    LAシンポジウム 

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    Event date: 2002.02   Language:Japanese  

  • 順序木パターンの質問による同定の複雑さ

    LAシンポジウム 

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    Event date: 2002.02   Language:Japanese  

  • 頻出順序木パターン発見に基づくウェブマイニング

    第46回人工知能学会SIGFAI-KBS合同研究会 

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    Event date: 2001.11   Language:Japanese  

  • タグとキーワードの関係を利用したテキストマイニング

    本人

    第46回人工知能学会SIGFAI-KBS合同研究会 

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    Event date: 2001.11   Language:Japanese  

  • ウェブからの情報抽出と最適パターン発見

    第4回情報論的学習理論ワークショップ(IBIS2002) 

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    Event date: 2001.04   Language:Japanese  

  • HTMLからの自動切り出しアルゴリズムと実装

    情報処理学会MPS研究会 

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    Event date: 2001.03   Language:Japanese  

  • 木構造の変換と平面グラフの埋め込み問題の関係

    本人

    LA シンポジウム 

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    Event date: 2001.01   Language:Japanese  

  • 基礎形式体系の質問学習の複雑さ

    LAシンポジウム 

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    Event date: 2001.01   Language:Japanese  

  • テキストマイニングを用いたウェブデータからのキーワード獲得

    九州大学情報基盤センター研究集会 

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    Event date: 2001.01   Language:Japanese  

  • 数値データからの回帰結合ルールの発見

    第14回人工知能学会全国大会 

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    Event date: 2000.07   Language:Japanese  

  • 木の変換規則の例からの学習

    本人

    第41回人工知能基礎論研究会 

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    Event date: 2000.07   Language:Japanese  

  • ネットワーク上のテキストからの知識発見

    本人

    「発見科学」平成12年度A04/A05班第2回会議 

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    Event date: 2000.04   Language:Japanese  

  • 木構造データからの変換規則の学習

    本人

    「発見科学」平成12年度A05班第1回会議 

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    Event date: 2000.04   Language:Japanese  

  • Learning Term Rewriting Systems from Entailment

    本人

    「発見科学」平成12年度A02班第1回班会議  

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    Event date: 2000.04   Language:Japanese  

  • 単純な文脈自由文法の能動予測困難性

    LA シンポジウム 

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    Event date: 2000.01   Language:Japanese  

  • ネットワーク環境におけるテキストデータからの知識発見

    本人

    「発見科学」平成11年度A05班第2回会議 

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    Event date: 1999.04   Language:Japanese  

  • データマイニング手法に基づくテキストデータからの知識発見

    本人

    「発見科学」平成11年度A05班第1回会議 

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    Event date: 1999.04   Language:Japanese  

  • Deterministic Finite-Memory Automata の決定問題

    本人

    LA シンポジウム 

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    Event date: 1997.02   Language:Japanese  

  • 有限オートマトンの効果的な学習,

    本人

    LA シンポジウム 

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    Event date: 1997.02   Language:Japanese  

  • 決定性有限メモリーオートマトンの学習可能性

    本人

    応用数学合同研究集会 

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    Event date: 1996.12   Language:Japanese  

  • On regularity of pattern languages

    本人

    LA シンポジウム 

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    Event date: 1996.02   Language:Japanese  

  • 形式言語における文字列パターンの特徴付け

    本人

    応用数学合同研究集会 

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    Event date: 1995.12   Language:Japanese  

  • 特性例と所属性質問からの言語学習:括弧言語の学習可能性

    本人

    第9回人工知能学会全国大会 

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    Event date: 1995.07   Language:Japanese  

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Industrial Property

  • 情報処理装置、情報処理方法、情報処理プログラムおよび情報処理システム

    坂本比呂志, 申吉浩

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    Application no:特願2019-93908  Date applied:2019.05.17

  • Data compression/decompression system, data compression method and data decompression method, and data compressor and data decompressor

    Shinichi Yamagiwa, Hiroshi Sakamoto

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    Application no:15560577   Date applied:2016.03.24

    Announcement no:20180054215  Date announced:2018.02.22

    Patent/Registration no:09948319   Date registered:2018.04.17 

  • Data Compression/Decompression System, Data Compression Method and Data Decompression Method

    Shinichi Yamagiwa and Hiroshi Sakamoto

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    Application no:特願 2015-63449  Date applied:2015.03.25

    Patent/Registration no:6256883  Date registered:2017.12.05 

  • Data Compression device and Data Decompression device

    Shinichi Yamagiwa and Hiroshi Sakamoto

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    Application no:特願2013-118356  Date applied:2013.06.04

    Announcement no:特開 2014-236449  Date announced:2014.12.15

    Patent/Registration no:6168595  Date registered:2017.07.07 

Lectures

  • データ圧縮の機械学習と秘匿計算への応用

    第120回人工知能基本問題研究会  2022.03  人工知能学会

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    Event date: 2022.03.22 - 2022.03.23   Language:Japanese   Presentation type:Invited lecture   Venue:オンライン  

    データ圧縮は、冗長性を取り除くことでデータサイズを削減する技術の総称で可逆圧縮と非可逆圧縮
    に大別される。どちらにおいても圧縮というプロセスは、データの規則性を発見することに帰着され
    る。ここから圧縮をなにか他の計算の前処理として利用するという考え方が生まれ、圧縮したまま情
    報検索などが盛んに研究されるようになった。近年では、機械学習とプライバシー保護計算が社会的
    な課題として非常に重要視されており、データ圧縮の応用もこの分野で活用されている。本稿では、
    それらのいくつかを紹介し、今後の展望を述べたい。

  • Grammar Compression: Grammatical Inference by Compression and Its Application to Real Data

    12th International Conference on Grammatical Inference  2014.09 

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    Language:English   Presentation type:Invited lecture  

  • 第14回EDIX大阪

    工学と情報学の掛け合わせによるDX人材の育成  2023.06 

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    Language:Japanese   Presentation type:Special lecture  

  • 工学と情報学の掛け合わせによるDX人材の育成

    第14回EDIX東京  2023.05 

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    Language:Japanese   Presentation type:Special lecture   Venue:東京ビッグサイト  

  • ストリームデータ圧縮とその応用

    第30回 回路とシステムワークショップ  2017.05  電子情報通信学会

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    Presentation type:Invited lecture   Venue:北九州国際会議場  

  • Grammar Compression: Grammatical Inference by Compression and Its Application to Real Data

    12th International Conference on Grammatical Inference  2014.09 

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    Event date: 2014.09.17 - 2014.09.19   Language:English   Presentation type:Special lecture  

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Press

  • 大学で必修化広がる「データサイエンス」 文系大学でも力を入れているのはなぜ?   Newspaper, magazine

    坂本比呂志

    朝日新聞社  AERAdot  2023.01.05

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    Author:Other  

  • 新聞報道

    山際伸一,坂本比呂志

    茨城新聞  2018.08.28

  • 新聞報道

    山際伸一,坂本比呂志

    常陽新聞  2015.08.27

  • 理系白書「挑戦の時」

    坂本比呂志

    毎日新聞  2009.12.08

Honors and Awards

  • 大学発ベンチャー表彰2018

    科学技術振興機構   2018.08.10

    山際伸一,坂本比呂志

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    Country:Japan

  • Best paper award

    2015.08.31

    Shinichi Yamagiwa Koichi Marumo Hiroshi Sakamoto

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    Country:United States

  • 人工知能学会2013年度研究会優秀賞

    人工知能学会   2014.06.13

    高畠 嘉将,坂本 比呂志

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    Country:Japan

Grants-in-Aid for Scientific Research

  • 圧縮学習:最適な可変長符号からの直接学習を可能にする理論の構築と実装

    Grant number:23K11233  2023.04 - 2028.03   基盤研究(C)

  • 圧縮秘匿計算による大規模データ処理

    Grant number:11111111  2021.10 - 2026.03   基盤研究(S)

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    圧縮秘匿計算」という新概念を提案する.これは次のような概念である.(a) 秘匿計算:個人のプライバシーを保護するためにデータを暗号化したまま保存,計算する.(b) 圧縮索引:データに付加する補助情報を圧縮することで大規模データを省資源の計算機で高速に処理する.(c) 圧縮計算:データを圧縮することで冗長性を排除し,データからの学習・解析の性能・速度を向上させる.この技術を個人ゲノム医療解析,自然言語等の非定型データの解析に応用する.

  • 圧縮情報処理によるストリームデータからの知識発見

    Grant number:26280088  2014.04 - 2018.03   基盤研究(B)

  • データ圧縮が発見する結び目理論の新定理

    Grant number:26540119  2014.04 - 2017.03   挑戦的萌芽研究

  • データ圧縮はテキストを要約できるか?

    Grant number:23650074  2011.04 - 2014.03   挑戦的萌芽研究

  • 圧縮マイニング:超大規模テキストに埋もれている知識の顕在化

    Grant number:23680016  2011.04 - 2014.03   若手研究(A)

  • グラフの局所的構造に基づく大規模半構造データからの高速パターン発見

    Grant number:20700143  2008.04 - 2011.03   若手研究(B)

  • 高速圧縮パターン照合に基づく組込み機器向けXMLデータベース基盤技術

    Grant number:19300008  2007.04 - 2010.03   基盤研究(B)

  • データの更新に対して頑健・高速な半構造データからの情報抽出アルゴリズムの構築

    Grant number:18700154  2006.04 - 2008.03   若手研究(B)

  • 大規模半構造データからの高速知識発見システムの開発

    Grant number:17200011  2005.04 - 2008.03   基盤研究(A)

  • 超高速データストリームのためのオンライン型半構造情報変換システムの開発

    Grant number:16650021  2004.04 - 2006.03   萌芽研究・萌芽的研究

  • データ圧縮とパターン照合に基づく高速機械発見システムの開発

    Grant number:15300049  2004.04 - 2005.03   基盤研究(B)

  • 最適パターン発見に基づく大規模半構造データからの知的情報獲得システムの開発

    Grant number:16016266  2004.04 - 2005.03   特定領域研究

  • 半構造テキストデータの一般構造を推論する高度情報抽出アルゴリズムの構築

    Grant number:15700136  2003.04 - 2005.03   若手研究(B)

  • 最適パターン発見に基づく大規模半構造データからの知的情報獲得システムの開発

    Grant number:15017268  2003.04 - 2004.03   特定領域研究

  • データ圧縮と高速文字列照合アルゴリズムを用いた知的全文検索システムの開発

    Grant number:13558029  2001.04 - 2004.03   基盤研究(B)

  • 最適パターン発見に基づく大規模半構造データからの知的情報獲得システムの開発

    Grant number:13224073  2001.04 - 2002.03   特定領域研究(C)

  • ネットワーク上の半構造テキストデータの変換規則に関する知識獲得システムの研究

    Grant number:12780233  2000.04 - 2002.03   奨励研究(A)

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Other Research Activities

  • JSPS外国人特別研究員書面審査委員

    2020.09
    -
    2020.10

  • JSPS特別研究員書面審査委員

    2020.07
    -
    2020.08

  • Workshop on Graph-based Algorithms for Big Data and its Applications (GABA2014) PC chair

    2014.11

  • 人工知能学会基本問題研究会主査

    2014.04
    -
    2016.03

  • 人工知能学会基本問題研究会幹事

    2012.05
    -
    2014.03

  • 情報処理学会論文誌 データベース編集委員

    2012.04
    -
    2016.03

  • IEICE Transactions on Information and Systems editorial board member

    2010.03

  • 電子情報通信学会Webインテリジェンスとインタラクション研究会幹事

    2004.07

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Activities of Academic societies and Committees

  • 飯塚研究開発機構   評議員  

    2022.05

Social activity outside the university

  • 夢ナビライブ

    Role(s):Lecturer

    2022.07.09

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    Type:Visiting lecture

    夢ナビライブで研究紹介

  • 取材対応

    AERA  高校生向けの情報発信  2022.06.24

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    Audience: Junior students, High school students

    Type:Other

    別冊AERAの取材対応:
    【特集】世界と未来につながる大学選び

  • 2022年データサイエンスプロ(深層学習特化型)

    Role(s):Lecturer

    九州工業大学  2022.03.08

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    Audience: General, Company

    Type:Seminar, workshop

    圧縮やプライバシーの機械学習

  • 夢ナビライブ

    Role(s):Lecturer

    FROMPAGE  2021.07.10 - 2021.07.11

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    Audience: High school students

    Type:Visiting lecture

  • 夢ナビライブ

    Role(s):Lecturer

    FROMPAGE  夢ナビライブ  2020.09.01 - 2020.10.01

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    Audience: High school students

    Type:Visiting lecture

  • 夢ナビライブ

    2018.10.20

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    Type:Visiting lecture

  • 夢ナビライブ

    2013.07.13

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    Type:Visiting lecture

  • 夢ナビライブ

    2012.05.26

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    Type:Visiting lecture

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