• Aerospace Industry
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• s.107
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• pp.86-87
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• 2010

• Aerospace Industry
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• s.107
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• pp.64-65
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• 2010

• Korean Journal of Environmental Agriculture
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• v.35 no.2
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• pp.104-110
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• 2016

BACKGROUND: There is lack of comprehensive compositional data of the amino acid profile of spinach with regard to different cultivars. A more detailed knowledge in this aspect will be of benefit in the future selection of spinach genotypes with improved nutritional quality.METHODS AND RESULTS: The effects of cultivar type (Jeoncheonhu, Sagyejul, Namdongcho and Mustang) and harvest time (79^th, 116^th and 145^th days after sowing or DAS) on the concentrations of free amino acids in field-grown spinach (Spinacia oleracea) were examined. About 35 different free amino acids were detected and quantified by the amino acid analyzer. Glutamic acid and proline were identified as the major amino acids, while α -aminoadipic acid and α-aminobutyric acid were present in much lower concentrations. Spinach constituted 1468.4 mg/100 g total free amino acids (TAA), of which essential amino acids, neutral/acidic amino acids and sulphur containing amino acids constituted around 15, 45 and 2% of the TAA, respectively. The most limiting amino acids among the leafy vegetables - cysteine was recorded only in Mustang harvested at 116 DAS. Free amino acid contents did not differ significantly among the spinach cultivars and also at different harvest times.CONCLUSION: The data show that, either of the spinach cultivars, preferably Mustang harvested on or after 116 DAS can serve as a significant source of nutritionally relevant amino acids to meet the demand of the growing populations.

• Structural Engineering and Mechanics
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• v.34 no.5
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• pp.611-623
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• 2010

Excessive stay cable vibrations can cause severe problems for cable-stayed bridges. In this paper a semiactive Magnetorheological (MR) damper is investigated to reduce cable vibrations. The control-oriented cable-damper model is first established; a computer simulation for the cable-damper system is carried out; and finally a MR damper is experimentally used to reduce the cable vibration in a laboratory environment using a semiactive control algorithm. Both the simulation and experimental results show that the semiactive MR damper achieves better control results than the corresponding passive damper.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.461-467
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• 2007

Exact application of the tensile force is critical to high-tension members in civil engineering structures, and thus actual tensile forces have often been estimated in field. To date, a few methodologies have been presented utilizing static and/or dynamic responses of tension members. Each of these methods has its disadvantages as well as advantages in its procedures, accuracy, and equipment requirements. In this paper, the feasibility of a sensitivity based methodology, based on the relationship between the natural frequencies and the applied tensile force, developed by the authors, is verified using the measured data from a cable-stayed bridge structure. From the results, it is shown that the proposed method can be utilized in estimating the tensile force in tension member of a real structure.

• The Journal of the Korean dental association
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• v.38 no.11 s.378
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• pp.1032-1041
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• 2000

5분이면 끝장을 본다는 말이 있다. 사람을 대할 때 첫인상이 대단히 중요하다는 뜻에서 나온 말이다. 사람을 만난 후 처음 5분내에 두 가지 중요한 결정이 이루어진다. 계속해서 대화를 진행시킬 것이냐 그리고 앞으로의 방향을 어떻게 전개시킬 것이냐가 결정된다. 치과의학은 사람들의 구강건강을 다루는 의료사업이다. 사업의 성공과 실패는 대인관계에서 이루어진다. 이러한 대인관계의 성공과 실패를 좌우하는 중요한 계기가 바로 처음 만난 후 5분 이내에 이루어진다는 사실을 우리는 잊어서는 안된다. Ford 자동차회사에서 Mustang이라 이름붙인 유명한 자동차를 탄생시킨 장본인이며 다 쓰러져가는 Chrysler 자동차회사를 파산지경에서 살려낸 유명한 사업가인 Lee lacocca는 bestseller가 된 그의 자서전에 다음과 같이 기록하고 있다. " 나는 빨리 사람을 알아내는 방법을 배웠다. 나는 사람을 처음 만날 때 내가 가장 중요하다고 생각하는 요점을 정확하게 빨리 말하는 기술을 습득했다". 처음 만난 5분간이 가장 중요하다는 사실이다. 그러기에 사람을 만날 때 처음 300초 동안에 자기가 가장 자신 있는 내용에 대하여 상대방과의 대인관계를 확실하게 마련하는 일이 중요하다. 이러한 마음의 자세를 가지고 개원치과의사들은 자기를 찾아오는 환자들을 맞아야 한다. 나는 강의를 시작하기 전에 중요한 내용에 대한 요점정리로 시작하는 것이 보통이다. 한 시간동안의 강의를 5분내에 정리하는 일이다. 무엇을 말 하느냐가 어떻게 말 하느냐보다 중요하다고 생각하기 때문이다.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.39-41
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• 2015

본 논문은 경량항공기에 사용되는 MFD의 판독성 및 가시성을 비교/분석한 것이다. 설문조사를 통해 현재 경량항공기 Cessna Citation Mustang 및 Cessna 172에 사용되는 Garmin사의 G1000과 개발 MFD와 비교/분석 하였다. 설문의 신뢰를 높이기 위해 항공 관계자들을 통해 데이터 수집이 이루어졌으며 정확성, 신뢰성, 적절성, 접근성, 주목성, 분별성, 사실성, 효율성, 디자인 등의 평가요인으로 질문을 작성 수집된 데이터를 통해 평가 및 비교/분석이 이루어 졌다. 수집된 데이터를 통해 기존의 상용 MFD와 개발 중에 있는 MFD를 비교함으로 개발 중인 MFD의 장단점을 분석하여 개발에 더 나은 방향을 제시 할 것이다.

• Structural Engineering and Mechanics
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• v.32 no.6
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• pp.741-754
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• 2009

Excessive cable vibrations are detrimental to cable-stayed bridges. Increasing the system damping of cables is a key solution to resolve this severe problem. Equations representing the dynamic characteristics of an inclined cable with a Deck-Anchored Damper (DAD) or with a Clipped Tuned Mass Dampers (CTMD) are reviewed. A theoretical comparison on the performance of cable vibration reduction between the cable-DAD system and the cable-CTMD systems is thoroughly discussed. Optimal system modal damping for the free vibration and transfer functions for the forced vibration for the two cabledamper systems are addressed and compared in detail. Design examples for these two different dampers are also provided.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.3
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• pp.524-535
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• 1997

The purpose of this study was to find out the clothing values and meanings by material values. The researcher used the scales of Richins & Dawson (1992) for Materialism Scale. The scales of Prentice (1987) and Ricllins (1994a, 1994b) for privateand public meanings of clothing. The scales of Prentice (1987) and Richins (1994a, 1994b) for importance clothes of private and public meanings.. The scales of Creekmore (1968) for clothing values. The subjects of this study were 154 girl students in the university. The research materials was analyzed by Frequency, MANOVA and Scheffe test The results of this study were as follows; 1) Higher group of material values had an orientation that emphasizes enjoyment values of clothing in private moaning and seems expensive of clothing in public meaning. 2) All group set a high value on both suits and jeans in clothing of private meanie that meant both interpersonal and enjoyment values and put much worth on both suits and mustang that concerned both costly and brand. 3) Higher group had significantly difference in aesthetic value and political value, and lower had significantly differene ineconomic value and theoretical value.

• Conservation Science in Museum
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• v.23
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• pp.71-90
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• 2020

The scientific analysis of a 'F-51D Mustang Fighter'(Registered Cultural Heritage 666), one of the War Memorial of Korean collections, was carried out. The paint layer and canopy were discolored due to a constant outdoor exhibit. The results obtained through the scientific survey and analysis processes were intended to be used as basic data for the future dismantling and restoration of the fighter. The analysis results for the pigment components have confirmed red oxide of iron, Fe₂O₃ organic pigments, such as Cobalt Blue, phthalocyanine blue, etc., yellow PbCrO₄, white TiO₂, black Fe₃O₄, and gray Fe₃O₄ + TiO₂. It has been also confirmed that Alkyd resin was mainly used for painting. The fighter's canopy was Poly methyl methacrylate(PMMA), and Al was detected as the main component of the fighter body, wings, and tails.