• Title/Summary/Keyword: 유일선

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First Mathematical Science Journal of Korea in 1905 (한국 최초의 수학 및 과학 저널 - 수리학잡지(數理學雜誌))

  • Lee, Sang-Gu;Seol, Han-Guk
    • Journal for History of Mathematics
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    • v.23 no.2
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    • pp.1-21
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    • 2010

  • The first Korean mathematical science journal was published by Yu, Il- Sun in 1905 and the name of this journal is "Mathematical Science magazine". This monthly journal was published for 2 years. But in the existing literature, there is no information about it. We discovered its existence and studied its contents. From the historical materials, pioneering contributions of Yu, Il-Sun to mathematics were provided. In this article, the first issue of this journal was fully analyzed. We could see his affection and enthusiasm for the journal that he started. More mathematical search efforts on finding historical math materials should be continued. More efforts should be made on finding historical math literatures. Related researches will be done. Those works will be worth to be shared in ICME-12 and ICM 2014.

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An Automatic Address Allocation Mechanism based on the Signal Strength for the PLC-based Home Network (전력선 홈 네트워크를 위한 신호 세기 기반의 자동 주소 할당 기술)

  • Hwang, Min-Tae;Choi, Sung-Soo;Lee, Won-Tae
    • Journal of Korea Multimedia Society
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    • v.11 no.8
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    • pp.1072-1081
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    • 2008

  • We can categorize the network address allocation mechanism into two types. One is to assign a unique network address using the address allocation server and the other is to make a random address by itself and process the DAD(Duplicate Address Detection) procedure. In this paper we suggest a new address allocation mechanism based on the signal strength for the PLC-based home network. As the combined mechanism of two types this mechanism allocates a unique address for the new node from one of the existing nodes with the simple equation and with the priority based on the signal strength from the new node to the existing nodes. We can use this mechanism for the self-healing function when the packet from the source node may not be delivered to the destination node directly. We developed the simulator for our mechanism using the C# programming and verified the network address assigned uniquely based on the signal strength.

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