• Journal for History of Mathematics
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• v.22 no.4
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• pp.41-52
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• 2009

This study investigates a mathematical subject, 'triangles' in mathematics books of Chosun Dynasty, in special Muk Sa Jib San Bub(默思集算法), Gu Il Jib(九一集), San Hak Ib Mun(算學入門), Ju Hae Su Yong(籌解需用), and San Sul Gwan Gyun(算術管見). It is likely that they apt to avoid manipulating general triangles except the right triangles and the isosceles triangles etc. Our investigation says that the progress of triangle-related contents in Chosun mathematics can fall into three stages: measurement of the triangle-shaped fields, transition from the object of measurement to the object of geometrical study, and examination of definition, properties and validation influenced by western mathematics.

• Journal of Physiology & Pathology in Korean Medicine
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• v.21 no.2
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• pp.370-378
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• 2007

${\ulcorner}$Zhujieshanghanlun(註解傷寒論)${\lrcorner}$ are som particular points as below ; first, set up the concepts of chuanjing(傅經), zaichuanjing(再傅經), and guojing(過經). Second, suggested the half exterior and half interior syndrome(半表半裏證) firstly. The third, understood origin literature by the distinguished way for syndrome in accordance with the Yin and Yang(陰陽). Forth, wangyang(亡陽) is described by two different syndromes. One is with perspiration. The other is yangxuzheng(양허증(陽虛證)) from injured yangqi(陽氣). Fifth, xialibiannongxue(下利便膿血) was distinguished by the generic characters of The Cold and Hot(熱${\cdot}$寒). The last, ${\ulcorner}$Shanghanlun${\lrcorner}$ (傷寒論) was described at the view of viscera & bowels's physiology and their pathology. And shaoyin(少陰) disease was aware of kidney case and Taiyin(太陰) disease was aware of spleen case. There are two different cases of bowel diseases. One is that xieqi(邪氣) goes in stomach of Yangming(陽明). The other is that xieqi(邪氣) follows channel and goes into bowel.

• Journal of the KSME
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• v.34 no.8
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• pp.582-586
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• 1994

국내적으로는 '60년 이래 급속히 진전되어 온 산업화와 도시화로 발생되는 환경오염문제를 조 속히 해결하고, 헌법에 보장되어 있는 국민의 환경권을 보호하기 위하여 적극적이고 효율적이며 쾌적한 환경조성이 절실하다. 국외적으로는 '92년 6월 브라질의 리우데자에이로에서 열린 유엔 환경개발회의(UNCED) 이후 범지구적인 환경문제의 해결의 중요성이 인식되어 있다. 그러나 선진국은 자국의 이익을 추구하기 위해 우수한 환경기술을 앞세워 무역 규제의 수단으로 활용 하려 하고 있다. 환경기술의 우위확보가 주해결방법이 될 환경라운드(Green Round)는 WTO의 활동이 시작될 '95년부터 본격화되리라고 예측되고 있다.

• Journal of the Korean Society for Precision Engineering
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• v.5 no.3
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• pp.63-70
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• 1988

This paper presents the development of a microcomputer-aided design program for a SISO control system. The program has been written in GWBASIC language which is suitable for Intel 80861 CPU with 640KB memory. By utilizing this program, sampling time, the number of bits for the A/D and D/A converter, and the stability for the digital control system can be determined. To demonstrate the utility of this program, a microcomputer controlled precision temperature control system has been employed as an example.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.16 no.1
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• pp.8-13
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• 1983

Three species of marine algae collected from the western coast of Korea were described. Of these, two species i. e., Hypoglossum geminatum Okamura and Sphacelaria radiata Takamatsu are newly recorded in Korea.

• The Journal of Information Technology
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• v.10 no.3
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• pp.77-92
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• 2007

This study aims to suggest an implementation methodology of security module for data integrity of mobile internet terminal. This is based on the WTLS(Wileless Transport Layer Security) of WAP Protocol. This security module is expected to achieve central role in conversion of wireless internet environment and emphasis of encryption technology and safe and calculable wireless communication environment construction.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1993.04b
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• pp.185-191
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• 1993

A flexible nanipulator can move in the high speed even with the small driving torque. The dynamic equations of flexible manipulator whichinclude 2 vibrationalmodes are derived using the clamped-free boundarycondition. Simulation results of the 6th order modelare well matched with experimental results. The hub angle of the flexible manipulator can be controlled without vibration of beam by the feedback of both hub angle and strain. The overshoot of the hub angle in the step resonse is reduced without sacrificing the rise time using the cycloidal function instead of the step function as the reference input.

• Journal of Plant Biology
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• v.32 no.4
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• pp.363-373
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• 1989

Morphotaxonomic accounts are given to four species of Amphiroa, Rhodophyta from Cheju Island ; A. valonioides Yendo, A. itonoi Srimanobhas et Masaki, A. rigida Lamouroux, and A. misakiensis Yendo. A. valomioides has one-tiered genicula of unequal length and its semiendophytic in other Amphiroan species, whereas A. rigida has two-tiered genicula of equal length and is semi-endophytic in non-articulated coralline alga. A misakiensis has five to thirteen-tiered genicula of unequal length and forms tufts on rocks where the branches are often recumbent. A. rigida is introduced for the first time to Korean flora.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.559-564
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• 1993

Nonlinear equation of motion of the flexible manipulator are derived by the Lagrangian method in symbolic form to better understand the structure of the dynamic model. The resulting equations of motion have a structure which is useful to reduce the number of terms calculated, to check correctness, or to extend the model to high order. A manipulator with a flexible 4 bar link mechanism is a constrained system whose equations are sensitive to numerical integration error. This constrained system is solved using the null space matrix of the constraint Jacobian matrix. Singular value decomposition is a stable algorithm to find the null space matrix.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.1269-1272
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• 1996

Several input shaping techniques are suggested to reduce the vibration of a flexible manipulator. The theories of typical 4 methods(Singer, Tuttle, Feddema, Zuo) are explained and are tested by the experiment of one link flexible manipulator. Zuo's method is the best of all with respect to its robustness.