• 소성∙가공
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• 제7권2호
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• pp.127-138
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• 1998

Process design of multi-step wire drawing process, conducted by means of finite element analysis and ANN(Artificial Neural Network) has been considered. The investigated problem involves the ade-quate selection of the drawing die angle and the correspondent reduction rate in the condition of desired initial and final diameter. Combinations of the process parameters which are used in finite ele-ment simulation are selected by using the orthogonal array. Also the orthogonal array. Also the orthogonal array and the results of finite element simulation which are related to the process energy are used as train data of ANN. In this study it is shown that the application of new technique using ANN and Othogonal array table to the process design of metal forming process is useful method.

• 대한한방내과학회지
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• 제26권3호
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• pp.685-691
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• 2005

A 33 year-old male who had been diagnosed with severe ulcerative and ankylosing spondylitis was treated and observed. Even though he had been treated with western medicine, he still complained of severe diarrhia, hemafecia, abdominal pain, general weakness, mild fever($37.8^{\circ}C$) and lower back pain. On radiologic examination, the lumbar view revealed the sacroliac joint space are irregular with adjacent bony sclerosis on both sides. He was treated with Chengsim Yeunja-Tang. Having been treated for 99 days, severity of ulcerative colitis changed from severe to mild ade, lower back pain reduced from nine to three, and all other symptoms improved.

• Journal of electromagnetic engineering and science
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• 제18권3호
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• pp.212-214
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• 2018

The finite-difference time-domain (FDTD) model was developed to analyze electromagnetic (EM) wave propagation in an inhomogeneous ionosphere. The EM analysis of ionosphere is complicated, owing to various propagation environments that are significantly influenced by plasma frequency, cyclotron frequency, and collision frequency. Based on the simple auxiliary differential equation (ADE) technique, we present an accurate FDTD algorithm suitable for the EM analysis of complex phenomena in the ionosphere under arbitrary-direction geomagnetic field. Numerical examples are used to validate our FDTD model in terms of the reflection coefficient of a single magnetized plasma slab. Based on the FDTD formulation developed here, we investigate EM wave propagation characteristics in the ionosphere using realistic ionospheric data for South Korea.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 1992년도 한국우주과학회보 제2권1호
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• pp.17-17
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• 1993

태양의 전자파 복사와 입자의 방출은 지구자기구에 변화를 주어 여러 종류의 플라즈마를 발생시킨다. 관측되는 플라즈마파중에서 주파수가 가장 낮은 영역의 파를 극초저주파수 파동(Ultra Low Frequency pulsation)이라 부르며 주기는 수 초에서 수십 분에 이른다. 본 연구에서는 자기권 내부에 존재하는 플라즈마구 영역(L <5)에서 발생되는 주기가 10 \ulcorner45초인 Pc 3파를 다룬다. 210˚ 자기자오선상에 위치한 Kagoshima(KAG. L=1.22), Chichihima(CBI, L=1.44), Birdsvile(BSV, L=1.57) Adelaide(ADE, L=2.13)관측소에서 1990년 7월27일 잡음정도가 0.1nT rms인 fluxgate 자기계측기를 사용하여 측정하였으며 이 자료를 이용하여 Pc 3파의 Power Spectrurn을 구하고 자기위도 변화에 따른 Pc 3파간의 상관성을 알아본다.

• Perspectives in Nursing Science
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• 제15권1호
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• pp.41-48
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• 2018

Purpose: The purpose of this study was to identify the latest evidence for interventions involving adolescent newlyweds, and the feasibility of premarital coaching (PMC). Methods: A narrative literature review design carried out through related studies was used for the present literature review. A diverse search from several databases was performed to create a critical appraisal and to develop a more integrated model for the PMC program. Studies that empirical, written in English, peer-reviewed, and published during 2008~2017 were included. Results: Six articles were selected for the review. The principal findings identified three major themes including underage period as a high-risk for marriage, development tasks of the newly married spouse, parenting self-efficacy and the psycho-educational approach of PMC to enhance parenting knowledge, skills, and readiness. Conclusion: It was found that content of PMC as the preparation of underage married couples were formulated based on coaching technic, various spouse and parenting educations, and adjusted based on couples's preferences. Rigorous studies with measurement of long-term retentions are needed.

• 한국가구학회지
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• 제19권5호
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• pp.307-318
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• 2008

Scientific methods for grading urushi lacquer includes general properties (viscosity, pH etc), and quantitative analysis of moisture, urushiol, gum, laccase content etc, and properties of coating layer such as set to touch drying time, gloss, color difference, delamination strength, tensile strength of film. The grading results evaluated by scientific method showed n order with chinese urushi lacquer (E) > domestic urushi lacquer (A) > japanese urushi lacquer (C) > chinese urushi lacquer (D) > domestic urushi lacquer (B). It is different from hose of traditional methods. Therefore, a more accurate grading of urushi lacquer should be ade by combining traditional method with scientific method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 심포지엄 논문집 정보 및 제어부문
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• pp.246-248
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• 2007

This paper presents fast locking PLL(Phase Locked Loop) that can improve a jitter noise characteristics and acquisition process by designing a PFD(Phase Frequency Detector) circuit. The conventional PFD has not only a jitter noise caused from such a demerit of the wide dead zone and duty cycle, but also a long delay interval that makes a high speed operation unable. The advanced PFD circuit using the TSPC(True Single Phase Clocking) circuit is proposed, and it has excellent performances such as 1.75us of locking time and independent duty cycle characteristic. It is fabricated in a 0.018-${\mu}m$ CMOS process, and 1.8v supply voltage, and 25MHz of input oscillator frequency, and 800MHz of output frequency and is simulated by using ADE of Cadence.

• Asian review of World Histories
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• 제3권1호
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• pp.37-58
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• 2015

The paper examines, in the light of current historiography, the recent trends in the application and applicability of the World Historical studies on the Indian Ocean scenario. Calling for the combination of the breadth of the World Historical studies with the analysis of a historical scenario in its specific spatio-temporal context-instead of a synchronic approach-the present study takes a close look at commerce and politics in the western Indian Ocean in the light of an early 14th century Latin Crusade tract, How to Defeat the Saracens by William of Adam (Guillelmus Ade, Tractatus quomodo Sarraceni sunt expugnandi), a Dominican friar. The text offers remarkable insights into the interlocking of the Indian Ocean and the South Asian subcontinent with the Mamluk Sultanate, the Ilkhanid realm and the Crusades. The paper argues for what is now termed as braided and connected histories.

• Asian-Australasian Journal of Animal Sciences
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• 제4권2호
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• pp.161-164
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• 1991

A rapid and accurate method is described for the determination of nucleo-bases in rumen micro-organisms. A procedure to satisfactorily hydrolyse the micro-organisms involving reaction with a mixture of readily volatile organic acids (acetic and formic acids) under high pressure, is proposed, and optimal conditions for an analytical procedure with reversed phase HPLC is described. The following nucleobases contents (mmol/kg DM) of rumen micro-organisms were found: Adenine (Ade), 82.62; Guanine (Gua), 61.34; Cytosine (Cyt), 84.61; Thymine (Thy), 35.74; Uracil (Ura), 68.62; Hypoxanthine (Hxn), 13.06; Xanthine (Xn), 8.35. Total purine-N content (g/kg N) of rumen micro-organisms were 99.60. The nucleic acid N content (g/kg N) of microbial isolates were: RNA-N, 109.9; DNA-N, 50.9.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2000년도 가을 학술발표논문집 Vol.27 No.2 (1)
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• pp.430-432
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• 2000

시뮬레이션을 구현할 때 대부분의 경우 eventlist 라는 자료구조를 사용하여 사건(event)를 처리하고 시간을 스케쥴링(scheduling)한다. 그러나 eventlist를 사용하는 것은 객체 스스로가 사건을 처리하고 시간 스케쥴링을 하지 않는다는 점에서 객체지향적이지는 못하다. 그래서 본 논문에서는 객체 스스로가 상태를 가지며 사건을 처리하고 시간을 스케쥴링하는 전차대 전차, 전차대 헬기 교전을 위한 시뮬레이션을 설계 및 구현하였다. 설계는 상태변화를 쉽게 하고 시간 전진 문제를 쉽게 처리할 수 있는 Fa$\square$ade Pattern방법을 사용하였으며, 시간전진 방법은 상태변화에는 논리시간(logical time)을 이용한 이산사건(discrete event) 전진방법을 사용하였고 Graphic Visualization에는 실시간(real time)을 이용한 이산(discrete) 전진방법을 사용하여 논리시간과 실시간을 병렬로 동기화시켜 처리하였다. 구현은 Visual C++의 MFC 라이브러리를 사용한 MDI구조로 구현하였다. 논문의 시뮬레이션은 교전모델을 응용하였고 객체지향(Objected-Oriented)으로 설계 및 구현되어 각 객체의 재사용과 확장 및 수정이 용이하다는 장점을 가진다.