• Radioisotope journal
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• v.17 no.1
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• pp.51-53
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• 2002

• The Science & Technology
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• no.1 s.464
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• pp.108-109
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• 2008

• 발명특허
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• v.10 no.5 s.111
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• pp.24-30
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• 1985

• The Science & Technology
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• v.34 no.5 s.384
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• pp.40-42
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• 2001

• Radioisotope journal
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• v.15 no.1
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• pp.31-38
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• 2000

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.10
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• pp.1908-1913
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• 2010

In this paper, a robust variable structure tracking controller is designed for the mixed tracking control of highly nonlinear rigid robot manipulators for the first time. The mixed control problem under consideration is extended from the basic tracking problem, with the different initial condition of both the planned trajectory and link of robots. This control problem in robotics is not addressed to until now. The tracking accuracy to the sliding trajectory after reaching is analyzed. The stability of the closed loop system is investigated in detail in Theorem 2. The results of Theorem 2 provide the stable condition for control gains. Combing the results of Theorem 1 and Theorem 2 gives rise to possibility of designing the improved variable structure tracking controller to guarantee the tracking error from the determined sliding trajectory within the prescribed accuracy after reaching. The usefulness of the algorithm has been demonstrated through simulation studies on the mixed tracking control of a two.link robot under parameter uncertainties and payload variations.

• 프린팅코리아
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• v.12 no.3
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• pp.62-73
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• 2013

3월 8일은 '세계 여성의 날' 이다. 1908년 당시 미국의 여성노동자들은 먼지 자욱한 현장에서 하루 12~14시간씩 일해야 했으나, 여성이라는 이유만으로 선거권과 노동조합 결성의 자유가 주어지지 않았다. 굶지 않기 위해 일하면서도 인간 이하의 삶을 강요받아야 했던 것이다. 그러던 1908년 3월 8일, 전 의류노동자들의 시위를 계기로 의류노동자연합이라는 조직이 탄생됐다. 이를 기념해 1911년부터 3월 8일을 '세계여성의 날'로 선정해 세계 곳곳에서 여성의 날 기념행사를 펼쳐오고 있다. 여성의 날에는 '그녀에게 빵과 장미를'이라는 구호를 외치는데, 여기서 빵은 생존을, 장미는 인간 존엄을 의미한다. 세계 여성의 날을 맞아 예전보다는 많이 호전됐지만 이직도 갈 길이 먼 여성경영활동 여건과 여성인쇄인에 대해 알아본다.

• Korean journal of applied entomology
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• v.21 no.4 s.53
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• pp.185-190
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• 1982

One new species and three newly recorded species of anthomyiid flies from Korea are treated as: Meliniella sobaeksana sp. nov., Fucellia apicalis Kertesz, 1908 gen. et sp. hav. nov., Fucellia kamtchatica Ringdahl, 1930 gen. et sp. hav. nov., and Delia robustiseta Judin, 1974 sp. hav. nov. Some male genitalic characters are given here respectively.

• Journal of the Korean Physical Society
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• v.73 no.12
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• pp.1908-1917
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• 2018

The binding affinity between the T-cell receptors (TCRs) and antigenic peptides mainly determines immunological recognition. It is not a trivial task that T cells identify the digital sequences of peptide amino acids by simply relying on the integrated binding affinity between TCRs and antigenic peptides. To address this problem, we examine whether the affinity-based discrimination of peptide sequences is learnable and generalizable by artificial neural networks (ANNs) that process the digital experimental amino acid sequence information of receptors and peptides. A pair of TCR and peptide sequences correspond to the input for ANNs, while the success or failure of the immunological recognition correspond to the output. The output is obtained by both theoretical model and experimental data. In either case, we confirmed that ANNs could learn the immunological recognition. We also found that a homogenized encoding of amino acid sequence was more effective for the supervised learning task.

• Animal Systematics, Evolution and Diversity
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• v.39 no.4
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• pp.295-299
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• 2023

Two land snails, Aegista chejuensis (Pilsbry and Hirase, 1908) and Plectotropis quelpartensis (Pilsbry and Hirase, 1908), are endemic to Korea and were collected from Hataedo and Jodo Islands in the Yellow Sea of South Korea, respectively. Many terrestrial snail habitats have been confirmed in Korea; however, their genetic sequences have rarely been reported. This study describes the mitochondrial cytochrome c oxidase subunit I gene (COI) sequences of two species, followed by an analysis of the genetic distance between these two species and their congeners. As a result, there was no intra-species variation in both species A. chejuensis or P. quelpartensis. However, the inter-species variation was clear (10.3-31.5%). We provide photographs and a brief diagnosis for morphological verification.