• 제목/요약/키워드: Jeong-a

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An Analysis of the Contents and Expression Methods of Jeong Yag-yong's 『Gugo Wonlyu』 (정약용의 『구고원류』의 내용과 표현방법 분석)

  • Lee, Kyung Eon
    • Journal for History of Mathematics
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    • 제29권1호
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    • pp.1-16
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    • 2016

  • This study analyzes the contents and expression methods of Jeong Yag-yong's "Gugo Wonlyu". The 530-page long "Gugo Wonlyu" discusses 1541 formulas about Gu, Go, Hyun, Hwa, Gyo; however, it has only the results of formulas and no explanations about their inducement method. Therefore we do not know how he derives and verifies the formulas. In addition, it did not follow the basic form of oriental mathematics textbooks: problem-answer-solution, and presented all the formulas only with characters without using numbers. This is a very distinctive aspect compared to other mathematical textbooks. In addition, the formulas about 5-Hwa and 5-Gyo are addressed exactly in fixed order and covers a formula in various directions. This is a clear evidence that Jeong Yag-yong analyzed and studied the Gugosul thoroughly.

  • https://doi.org/10.14477/jhm.2016.29.1.001 인용 PDF KSCI

A study on the problems and solutions of the illegal charges transportation act by using a private truck (자가용화물차량의 불법유상운송 행위에 따른 문제점과 개선방안)

  • Lee, Seok-Hyeon;Kim, Jeong-Hyeon;Jeong, Jae-Jeong;Lee, Gye-Jeong;Jo, Gwang-Hui;Seong, Haeng-Gi;Hwang, Dae-Seong
    • Proceedings of the Safety Management and Science Conference
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    • 대한안전경영과학회 2011년도 추계학술대회
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    • pp.449-455
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    • 2011

  • Illegal transportation act using a private truck cases indigested freight market. Moreover it incurs social and economic damage. There are some remedy for this problem that is reintroducing suspension of the service law, creating the law to punish client who have the goods which is delivered and improving transportation environment.

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