• Title/Summary/Keyword: RYU

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Activity Space of Yangban Landlords during the Colonial Era : Based on the Kieo written by Ryu Hyeong-eop - (일기를 통해 본 한말${\sim}$일제강점기 양반소지주의 활동공간 - 류형업의 "기어"를 자료로 -)

  • Jung Chi-Young
    • Journal of the Korean Geographical Society
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    • v.39 no.6 s.105
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    • pp.922-932
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    • 2004

  • This paper uses the diary entitled Kieo, which was kept by Ryu Hyeong-eop for 38 years, to analyze the active space of small-scale Yangban landlords. Ryu lived during the period spanning from the end of the Taehan Empire through the colonial era. The researcher classified the contents of Kieo into different sections which were divided according to different stages of the writer's life, his objectives, destinations, and periods, and based on the writer's life-cycle, strived to recreate his spatial activities. As a result, researcher was able to ascertain that Ryu's spatial activities gradually increased, and that his active space also continuously expanded. Ryu's active space during his youth was narrow and centered around certain specific places. However, this active space gradually increased as time went by. It was during the middle stages of his life that the volume of his spatial activities was the heaviest. In addition, the objectives of his outings also became more diversified over time. This change was originated in the larger changes in his roles within the family and community, as well as by the changes in the periodic situation. Moreover, the regional sphere of Ryu's outings, including his day and over nights trips, allowed the researcher to form a better understanding of the daily living area of the Yangban.

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VFF-PASTd Based Multiple Target Angle Tracking with Angular Innovation

  • Lim, Jun-Seok;Choi, Yongjin;Yoon, Sug-Joon
    • The Journal of the Acoustical Society of Korea
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    • v.22 no.1E
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    • pp.19-25
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    • 2003

  • Ryu et al. recently proposed a multiple target angle-tracking algorithm without a data association problem. This algorithm, however, shows the degraded performance on evasive maneuvering targets, because the estimated signal subspace is d,:graded in the algorithm. In this Paper, we proposed a new algorithm, in which VFF-PASTd (Variable Forgetting Factor PASTd) algorithm is applied to Ryu's algorithm to effectively handle the evasive target tracking with better time-varying signal subspace.

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A Consideration on the Risk-Based Remedial methods of Petroleum-contaminated Farmlans (위해성에 근거한 유류오염 농지의 복원방안에 대한 고찰)

  • Yu, Chan-ryu;Ryu, Si-Chang;Lee, Keun-Hoo;Cho, Byung-Jin
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 2002.10a
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    • pp.409-412
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    • 2002

  • In this presentation, the methods that is appropriate to remediate the farmland contaminated by petroleum hydrocarbon was considered using the case histories of the abroad. As a result of a consideration, most remediation procedures were based risk assessment and management, risk-based procedure. It is also useful to use natural attenuation mechanism to remediate petroleum-contaminated sites. However, more research efforts are demanded for developing a cost-effective and efficient technologies.

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