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  • Publication . Report . 1989
    Closed Access English
    Country: Netherlands
  • Publication . Article . 2015
    Closed Access
    Country: Netherlands
  • Closed Access English
    Country: Netherlands
  • Open Access English
    Authors: 
    Congying Han; Lijun Xu; Guoping He;
    Publisher: COMPUTING AND INFORMATICS

    This paper considers the problem of mining recent frequent itemsets over data streams. As the data grows without limit at a rapid rate, it is hard to track the new changes of frequent itemsets over data streams. We propose an efficient one-pass algorithm in sliding windows over data streams with an error bound guarantee. This algorithm does not need to refer to obsolete transactions when they are removed from the sliding window. It exploits a compact data structure to maintain potentially frequent itemsets so that it can output recent frequent itemsets at any time. Flexible queries for continuous transactions in the sliding window can be answered with an error bound guarantee.

  • Open Access Japanese
    Publisher: 慶應義塾大学大学院社会学研究科

    Though the piano is originally a European instrument, many Japanese people are more familiar with the piano than they are with Japanese instruments. Piano culture expanded in Japan during the period of high economic growth, namely from 1954 to 1973, and therefore today many in Japan play the piano. However, piano culture developed even more substantially following the period of high economic growth, especially from the 1980s onward. For example, during this period many of those learning to play the piano participated in piano competitions. This study focuses on piano culture in Japan from the 1980s. I analyzed the 1980s piano culture using interviews. The number of learners aspiring to study piano began to gradually decrease at this time. However, the number of "high-ranking amateurs" increased. High-ranking amateurs are skilled piano players who have never studied piano at a music college. Playing piano is merely a hobby to them. They choose to clear a fiercely competitive entrance examination, and go on to study something other than music. Bourdieu classifies interests into two groups: "interests of necessity" and "interests of luxury." According to Bourdieu, high-ranking amateurs have interests of luxury, because to them playing the piano is far from a necessity. They do not need to earn a living as music teachers. However, their piano playing does not constitute an interest of luxury according to Bourdieu. Rather, high-ranking amateurs have learned to play piano at the insistence of their parents; —they had to study piano earnestly since they were children. Piano culture is also part of the education of high-ranking amateurs. 論文

  • English
    Authors: 
    SATO, KAIJI;
  • Open Access Japanese
    Publisher: お茶の水女子大学生活科学部生活工学研究会
  • Open Access German
    Authors: 
    Duppel, Mechthild;
    Publisher: 上智大学ヨーロッパ研究所

    視察レポート

  • Publication . Research . 1994
    Japanese
    Publisher: 沖縄国際大学商経学部
  • Publication . Article . 2002
    Japanese
    Authors: 
    Senoo, Dai;
Advanced search in
Research products
arrow_drop_down
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includes
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Include:
168,696,114 Research products, page 1 of 16,869,612
  • Publication . Report . 1989
    Closed Access English
    Country: Netherlands
  • Publication . Article . 2015
    Closed Access
    Country: Netherlands
  • Closed Access English
    Country: Netherlands
  • Open Access English
    Authors: 
    Congying Han; Lijun Xu; Guoping He;
    Publisher: COMPUTING AND INFORMATICS

    This paper considers the problem of mining recent frequent itemsets over data streams. As the data grows without limit at a rapid rate, it is hard to track the new changes of frequent itemsets over data streams. We propose an efficient one-pass algorithm in sliding windows over data streams with an error bound guarantee. This algorithm does not need to refer to obsolete transactions when they are removed from the sliding window. It exploits a compact data structure to maintain potentially frequent itemsets so that it can output recent frequent itemsets at any time. Flexible queries for continuous transactions in the sliding window can be answered with an error bound guarantee.

  • Open Access Japanese
    Publisher: 慶應義塾大学大学院社会学研究科

    Though the piano is originally a European instrument, many Japanese people are more familiar with the piano than they are with Japanese instruments. Piano culture expanded in Japan during the period of high economic growth, namely from 1954 to 1973, and therefore today many in Japan play the piano. However, piano culture developed even more substantially following the period of high economic growth, especially from the 1980s onward. For example, during this period many of those learning to play the piano participated in piano competitions. This study focuses on piano culture in Japan from the 1980s. I analyzed the 1980s piano culture using interviews. The number of learners aspiring to study piano began to gradually decrease at this time. However, the number of "high-ranking amateurs" increased. High-ranking amateurs are skilled piano players who have never studied piano at a music college. Playing piano is merely a hobby to them. They choose to clear a fiercely competitive entrance examination, and go on to study something other than music. Bourdieu classifies interests into two groups: "interests of necessity" and "interests of luxury." According to Bourdieu, high-ranking amateurs have interests of luxury, because to them playing the piano is far from a necessity. They do not need to earn a living as music teachers. However, their piano playing does not constitute an interest of luxury according to Bourdieu. Rather, high-ranking amateurs have learned to play piano at the insistence of their parents; —they had to study piano earnestly since they were children. Piano culture is also part of the education of high-ranking amateurs. 論文

  • English
    Authors: 
    SATO, KAIJI;
  • Open Access Japanese
    Publisher: お茶の水女子大学生活科学部生活工学研究会
  • Open Access German
    Authors: 
    Duppel, Mechthild;
    Publisher: 上智大学ヨーロッパ研究所

    視察レポート

  • Publication . Research . 1994
    Japanese
    Publisher: 沖縄国際大学商経学部
  • Publication . Article . 2002
    Japanese
    Authors: 
    Senoo, Dai;
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