• Food Science and Preservation
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• v.17 no.6
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• pp.847-852
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• 2010

The anthocyanin pigment composition and color of several grape cultivars including Campbell Early, Muscat Bailey A, Kyoho (black berries), and North Red (red berries), were investigated. Twelve types of anthocyanins were identified in these cultivars by LC-MS. Black-colored cultivars, especially Muscat Bailey A, contained the widest range of anthocyanins, whereas the anthocyanin composition of North Red, the red-colored cultivar, was relatively simple. Anthocyanins extracted from the skin of berries were red in color at low pH, regardless of the origin of the extract. At higher pH, however, various colors, including blue, violet, brown, and black, were evident, depending on the cultivar. Differences in color expression among cultivars may be related to variations in the types and amounts of anthocyanidins synthesized, from which anthocyanin pigments are derived. The colors expressed by anthocyanin pigments were strong and diverse even at low concentrations. Therefore, anthocyanins extracted from grapes may be useful as natural food colorants.

• Journal of The Korean Society of Grassland and Forage Science
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• v.19 no.4
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• pp.355-362
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• 1999

This experiment was conducted to evaluated the effect of maturity at harvest and wrap colors on the quality of round baled rye(Secal cereale L.) silage at the forage experimental field, Grassland and Forage Crops Division, National Livestock Research Institute, Suwon in 1998. The experiment was consist of split-plot design with three repications. The main plots were three different harvesting stages : boot, heading, and flowering stages, the subplots were wrap colors : white, black, and light green color. Acid detergent fiber(ADF) and neutral detergent fiber(NDF) of rye silage were increased with delayed harvesting date, but there were no significant differdence among wrap colors. However, average in vitro dry matter digestibility (IVDMD) of rye silage with white color wrap tended to have higher than those of other colors. The silage pH of heading stage was highest (5.12), and that of flowering stage was lowest (4.57) in different harvest stages. Among tested wrap colors, white color wrap resulted on lowest pH than others (p<0.05), but there were no significant difference between black and light green color. Dry matter (DM) content of rye silage were increased as harvest stage progressed (p<0.05). However, DM content of white color was highest among warp colors, but there was signifiant difference (p<0.05). Ammonia-N content of silage harvested at boot stage was the highest in harvest stage, but there was no difference between heading and flowering stages. Among wrap colors tested, ammonia-N content of black color was highest, but there was no significant difference. The number of lactic acid bacteria of white colors was highest in different colors, and that of flowering stage was highest among harvest stage. Acetic and butyric acid contents were decreased as harvest stage progressed, and lactic acid was increased from 6.33 to 7.98%. However, wrap colors did not influence lactic acid concentration. Among different wrap colors, outside temperature of rye silage was affected by air temperature, but effect of inside temperature was minimal. Black color wrap increased inside temperature by $3{\sim}5^{\circ}C$. The results of this study indicate that rye should be harvested for round bale silage after heading stage. The quality of rye silage wrapped white and light green color will increase slightly.

• Journal of The Korean Society of Grassland and Forage Science
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• v.21 no.1
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• pp.1-6
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• 2001

This experiment was conducted to evaluated the effect of maturity at harvest on the changes in quality of round baled rye silage at forage experimental field of Grassland and Forage Crops Division, National Livestock Research Institute, RDA, Suwon in 1998. The experimental design was a split-plot design with three replications. The main plots were three different harvest stages : boot, heading and flowering stages, and the subplots were days after ensiling : 1, 2, 3, 5, 10, 30, 45, and 60 days. The wilting period of boot, heading and flowering stages were 1, 0.5 and 0.5 days, respectively. The final pH of rye silage was higher in the order of flowering, boot and heading stages. And pH of flowering stage began to change at early fermentation period, but that of boot and heading stages was delayed 1~2 days. Ammonia-N content of boot stage was highest. and that was increased as fermentation progressed. But Ammonia-N of heading stage was decreased to 30 days. then that was increased after 45 days fermentation. Among fermentation periods, inside temperature of deep place was not affected by external temperature. And that of deep place was increased to 3$0^{\circ}C$ at early fermentation. then decreased as fermentation progressed. However surface temperature was affected by external temperature after 10 days. Acetic acid content was not changed with 5 days by harvest stages, but that of boot stage was increased after 10 days. Butyric acid of boot stage was increased after 5 days. but that of heading stage was increased after 10 days. However lactic acid was increased from 1~2% to 6~8%. Lactic acid bacteria (LAB) of heading and flowering stages were highest at 5 days fermentation, and that of boot stage was highest at 10 days fermentation. The results of this study indicate that fermentation of round baled rye silage occur within 5 days. Therefore, any modification should be applied with an 5 days for high quality of round baled rye silage.

• Korean Journal of Child Studies
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• v.5
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• pp.53-64
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• 1984

The purpose of this research was to supplement the preceding study and to examine the feasibility of standardizing the Bayley Scales of Infant Development (BSID) for Korean infants. The subjects of this research were 93 healthy infants at 1-12 months of age living in Seoul. Seventy were the same infants as the subjects of the preceding research. Statistical analysis of the results was done by Item analysis and scalogram analysis using Green's method. The scalability of the BSID for Korean infants was .78 on the mental scale and .8l on the motor scale. Item order by counting positive responses was slightly different from the original BSID item order. On the feasibility of standardization of the BSID in Korea, the results showed that: 1) The BSID is scalable for Korean infant development, and 2) The BSID needs correction in item rank order.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2012.03a
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• pp.91-91
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• 2012

본 연구에서는 아랍 중동지역 이슬람교 여성들이 착용하고 있는 베일이나 망토 형태의 전통의상(히잡(Hijab), 차도르(Chador), 아바야(Abaya) 등)에 사용되는 심색 제트블랙(Jet-Black) 소재를 개발하기 위하여, 고분자 조합에 의한 심초형 복합방사(POY 85/36) 및 열연신 복합가공사(ACY 135/72)를 개발, 심미적 심색성 및 세탁견뢰도가 우수한 Jet-Black 제품(L값 7.32)을 개발하였다.

• The Safety technology
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• no.145
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• pp.12-14
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• 2010

서울의 중심 종로구, 한국의 선진 경제를 상징하는 각종 건축물이 모여 있는 곳. 우뚝 솟은 건물들은 아름다운 스카이라인을 연출하며 이곳을 오가는 수 십만 행인들의 탄성을 자아낸다. 지금 이곳에선 또 하나의 우수한 건축물이 베일을 벗고 기대에 찬 사람들을 맞이할 준비를 하고 있다. 그 주인공은 바로 신동아건설 신문로 2구역 제5지구업무시설 신축현장. 이곳을 흙먼지 펄펄 날리는 흔한 건설현장이라고 생각한다면 큰 오해를 할 것이다. 외관에서 내관에 이르기까지 깨끗이 정리된 모습은 현장을 방문한 이들이 '이 곳이 건설현장이 맞나'하는 의구심까지 들게 한다. 또한 '조금의 진동과 약간의 먼지도 허용하지 않겠다'는 투철한 각오로 도심 속 현장에 맞는 공법을 도입, 조용함 속에 철저한 시공을 진행하고 있다. 이곳 현장은 지하 5층~지상 14층 규모의 업무시설로 현재 46.5%의 공정률을 보이고 있다. 2010년 10월을 준공일로 예정하며, 준공까지는 대략 10개월 남짓 남은 상황, 현재까지 무재해를 이어가고 있다. 시시각각 변화하는 공정에다 여러 협력업체들이 모여 있는 건설현장의 가변적 특성에도 불구하고 지금까지 무재해를 이어오고 있는 것이다. 이같은 배경에 대해 이곳 현장의 임직원들은 현장 내 자연스럽게 자리잡고있는 '자율적인 안전관리 문화'와 '감성안전문화'를 꼽는다.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1998.10a
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• pp.186-191
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• 1998

Electropolishing is the anodic dissolution process in the transpassive state. It removes non-metallic inclusions and improves mechanical and corrosion resistance of stainless steel. If there is a Bailby layer, it will be recovered again. Electropolishing is normally used to remove a very thin layer of material on the surface of a metal component. The aim of this study is to determine the tendencies of electropolishing STS316L tubes in terms of current density, machining time, temperature, electrode gap and surface roughness.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2011.06a
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• pp.230-236
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• 2011

Despite economic sanctions, including Western countries' ban on exports of advanced technology, North Korea is regarded as being equipped with independent technology power in the science technology sector as shown in its launch of intercontinental ballistic missile. However, North Korea has been shrouded in mystery in terms of software technology level. Chosun Computer Center, a software development institution representing North Korea since 2006, mobilized IT experts from Kim Il-sung University and Kim Chaek University of Technology and launched a project for an independent development of a computer operating system (OS), called "Red Star." Recently, it made public the 2.1-version. The OS program, which was manufactured in two types for a server computer and personal computer and are being supplied to institutions and individuals.

• Transactions of the Korean Society of Automotive Engineers
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• v.23 no.2
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• pp.239-245
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• 2015

In order to control the hybrid power system efficiently, the knowledge for the required load of the system is important. The agricultural tractor performs various farm works such as plow, rotary, and baler. When it performs rotary tillage and baler operation, the generated work load is analyzed. To analyze trend of work load, moving average technique is applied to the measurement data. Optimal control inputs for the two works are obtained from simulation using the dynamic programming. The novel fundamental control strategy for parallel hybrid tractor called Max. SOC is proposed.

• Journal of Educational Research in Mathematics
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• v.27 no.4
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• pp.663-678
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• 2017

Semiotic studies in mathematical education have been based on Saussure, Peirce, and Frege and many prior researches have explored the concepts in a perspective of semiotics. However, the relationship among semiotical elements and the formation and the evolution of a conception are still ambiguous and veiled in many aspects. This thesis is intended to show how a conception was formed and evolved by expression, which is an element of semiotics. In this process, I sought to partially illuminate the relationship among expressions, concepts, and objects.