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Improvement of the Intrusion Detection Method Based on User Command History Using the Adaboost Machine Learning Meta-algorithm
No full textIn this study,we investigate the new intrusion detection method with Adaboost machine learning
meta-algorithm. Adaboost can be used to improve their performance conjuncting multiple weak
descriminators. We construct 6 weak descriminators for user command history and we conjunct
these weak discriminator with Adaboost. As a result of experiment,we found that it is improved
intrusion detections with Adaboost
小規模校における多様な人間関係構築のためのネット会議システムを用いた学校連携プロジェクトの実践と問題点
No full text本報告では,小規模校における多様な人間関係構築機会を保証するために,複数の学校を,ネット会
議システムを用いて常時接続する学校連携プロジェクトの実践を行った。半年間の実践後,関係者に対
するインタビューを実施し,本プロジェクトに対する問題点を明らかにした。具体的には,学校ごとに
時程が異なり,休み時間が同一ではないという問題があった。そのため,子どもたちの交流が妨げられ
るという事態になっていた。また,複数の学校で行っているため,学校ごとにそれぞれのニーズが異な
るという問題が明らかとなった
Words and Experiences that Reaffirm the Values of Farming and Rural Life: Findings from Qualitative Interview Research in Fukui Prefecture, Japan
No full text
Correlation between fragility and cooperativity in segmental dynamics of glass-forming para-substituted polystyrenes
No full textTo understand the mechanism of the viscous slowdown in supercooled liquids that is
responsible for glass transition, we investigate the interrelation between glass transition
temperature Tg, fragility, and cooperativity in segmental dynamics. Polymeric
glass-formers having a similar chemical structure are expected to exhibit clear
correlations between the above parameters. In this paper, polystyrene (PS) derivatives
possessing various para-substituents are studied using calorimetry in regard to the
fragility parameter m, dynamic length scale ξ, and the number of cooperatively
rearranging segments NCRR at Tg. Positive correlations were revealed for both NCRR(Tg)
vs. m and ξ3(Tg) vs. m. Both fragility and cooperativity were found to increase as the
bulkiness of the substituent increases. Wide-angle X-ray scattering measurements
revealed that the structural correlation between backbone chains is reduced as the
bulkiness increases. This may be responsible for the reduced cooperativity. In contrast,
for poly(methacrylic acid ester)s, the relations between the above parameters appeared
to be less clear. The clear trend observed for the PS system may be due to the rigidity of
the phenylene unit, through which the substituent directly affects the backbone
dynamics. The estimated activation energy per segment increased consistently with an
increase in the para-substituent's bulkiness