• Life and Agrochemicals
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• v.28 no.1 s.224
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• pp.36-37
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• 2007

올해부터 쌀 품종 혼입률을 다르게 표시하면 처벌하고, 음식점 식육원산지표시제가 실시된다. 또 사고농가 영농도우미와 고령 취약농가 가사도우미 사업이 전국으로 확대된다. 특히 현행 4종류인 친환경농산물 인증 종류가 3종류로 간소화 된다. 새해 달라지는 주요 농정제도와 시책을 알아본다.

• Journal of the Korean Society of Propulsion Engineers
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• v.24 no.4
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• pp.33-40
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• 2020

A sturdy on the adhesion properties of solid propellants, liners, and insulation was carried out according to the types of barrier coats. A barrier coats were used to prevent migration of the plasticizer or curative between the propellant/liner/insulation, and the barrier coat was selected out of Isocyanates with different molecular weight and number of -NCO in one molecule. As a result, it was found that the more the -NCO group and the larger molecular weight, the stronger adhesion. In addition, as a result of experiments about effects of the pot life after applying the barrier coat on bond strength, the adhesion strength was shown to increase as the pot life was short.

• Journal of Korean Home Economics Education Association
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• v.18 no.2 s.40
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• pp.135-149
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• 2006

This study analyzed the unit of child rearing in four Household textbooks approved by the Department of Education during the 1920s-30s. These Household textbooks is contained a unit related to child rearing among Household textbooks approved by the Department of Education at that time. The results of the analysis are summarized as follows. First, the structure of the child rearing unit in the Household textbooks were largely composed of 'part, chapter and section' and this structure and contents were similar among all the textbooks. Second. in general, the four textbooks spared a large space for 'childcare,' nursing' and 'new-born babies and infants,' suggesting the importance of these contents. Third, cautions for pregnant women were taught to call attention not only of pregnant women but also of their families to importance of pregnancy. Fourth, the child rearing unit contained many illustrations and pictures and some pictures were shared among the textbooks. Firth, in acquiring medical knowledge related to diseases, the textbooks demanded child-rearing mothers to 'observe' and 'scrutinize' any symptoms appearing in the child. These contents were connected with commercial products but far distant from the realities. The detailed method of 'nursing' also required a lot of time and accuracy impractical in real life.

• Journal of the Korean Society of Costume
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• v.50 no.8
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• pp.75-86
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• 2000

This paper examined the contemporary kasaya of each country in Asia, focussing on the Kasaya Kongyang ceremony and kasaya varieties. As well, the countries in Asia were divided into the southern Buddhist countries, northern Buddhist countries, and Tibetan buddhist countries, and were comparatively analyzed. 1. In terms of the Kasaya Kongyang ceremony, now days the southern Buddhist countries perform the Katina ceremony, passed down from the time of the Buddha. In the northern Buddhist countries, namely China, the kasaya is bestowed to the monk at the end of the precepts ceremony, while in Korea, the kasaya is bestowed to the monk at the end of the ceremony of "opening the eye" of an image. There is no Kasaya Kongyang ceremony in Japan and Tibetan Buddhist countries. 2. In terms of the varieties of kasaya, because the Katina ceremony is performed with 5 jo in southern Buddhist countries, their kasayas are made up of 5 jo, with the exception of Myanmar's sungari. In Taiwan and Korea, which are of the Zen order and part of the northern Buddhist countries, there are 5-25 jo. In Japan, which is of the Kyo, or doctrinal order, it is made up of 5-9 jo. The Tibetan Buddhist countries have only jo that are 7 and 23. In conclusion, when Buddhism was transmitted from the southern Buddhist countries to the northern Buddhist countries, we can see that the Kasaya Kongyang ceremony and the from of the kasaya itself changed from practical robes to majestic ones, in accord with the Mahayana doctrine of saving all sentient being. Therefore, the kasaya simbolizes the Buddhist philosophy that Mahayana claims the existence of many Buddhas at one and the same time.same time.

• Sijohaknonchong
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• v.22
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• pp.143-171
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• 2005

Sip and Byul-Gok (New tunes), as folks musics, are musical concepts opposite to that of the Court musics. They have the tunes. typical and universal. and Byul-Gok for singing. has the words in which the properties of melodies in the structures of compositions are reflected harmoniously. The Song. or Shiga. in Koryo-Sa, History of Koryo. Acjee and Acjanggasa. named ByulGok. is divided into two types. according to the characteries of the forms.: Koryo Sokyo. or the folk songs in Koryo. such as Chengsanbylulgok. and Segyoungbyulgok. and Kyonggichega, or nobility songs in Koryo and Chosen Dynasty. such as Hallimbyulgok. Kwandongbyulgok. and Jucgyebyulgok. In addition. Gasa. or the nobility and folk songs in Chosen Dynasty. such as K wandongbyulgok. also has the title. Byul-Gok. Even though these types of the songs have the same tittle. Byul-Gok, it is not appropriate that Byul-Gok is used as a term described as a branch of the literature: in light of music. they have the properties in common in the sense that they are opposite to the Court music. but. in light of literature. their forms are very different from one another. Therefore, it is appropriate that they are classified according to the characteristics of the forms, winters, the ideology of people who enjoy them, and periods: Sokyo, Kyonggichega, and Gasa. Byul-gok means not only the folks songs opposite to the court musics, but also the songs by setting words to the melodies present. Orignal tunes and their new tunes are not different musical compositions, but the same ones with the melodies which Korean acquired transcendentally. It is general tendency, at those times, that after compositions were made, words are set to them. Such words represent the politic thought in which courtesy and music are considered important. and the spirit with which the ruler and the people enjoy together.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.04a
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• pp.319-320
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• 2000

최근에 산업화와 도시화 등으로 인해 대기오염이 날로 중요한 문제로 대두되고 있다. 대부분의 오염물질은 그 종류와 발생원이 복잡, 다양할 뿐만 아니라 시료의 채취와 분석방법에 내재된 기술적 어려움이 많은 실정이다(Evans et al., 1992). 환경으로 배출되는 페놀 화합물은 주로 산업지역에서 배출되며, 음용수에 의한 오염도 보고되어 있어, 빠르고 선택적인 방법이 요구되고 있는 실정이다(Karen et al., 1994). 현재 대기오염공정시험방법의 제 16항 페놀 화합물의 분석방법은 화학반응 등에 의해 굴뚝에서 배출되는 고농도 배출가사에만 치중되어 있어(환경부, 1998), 대기중에 존재하는 미량 페놀을 분석적용하기에는 한계점이 있다. (중략)

• Journal of Adhesion and Interface
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• v.21 no.2
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• pp.65-70
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• 2020

Epoxy adhesive was mainly used to combine different composite materials. Epoxy adhesive was a typical thermosetting resin that can be bonded by changing from a linear structure to a three-dimensional network structure by curing reaction of epoxy and hardener. The curing conditions of epoxy adhesive were different with different types of hardener such as mixing ratio, curing time, and temperature. These curing conditions affected to the adhesive property of epoxy adhesive. In industry, it was difficult to proceed the applying epoxy adhesive and combining two parts immediately. The adhesive property decreased by humidity and pre-curing of epoxy adhesive in waiting time between two processes. In this paper, the glass fiber reinforced composite (GFRC) was combined with epoxy adhesive and adhesion property between epoxy adhesive and GFRCs was evaluated using single lap shear test. The different waiting times and humidity conditions were applied to epoxy adhesive in room temperature and adhesive property decreased as the waiting time increased. In small amount of humidity, the adhesive property increased because a small amount of moisture in the surroundings accelerated the curing reaction. In certain amount of humidity, however, the adhesion property decreased.

• International Journal of Highway Engineering
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• v.14 no.1
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• pp.17-24
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• 2012

This study evaluated the performance of Korean epoxy asphalt mixtures using several laboratory tests. Four types of epoxy asphalt mixtures were manufactured based on 13mm dense graded asphalt mixtures: three Korean and one Japanese epoxy asphalt mixtures where 20% or 40% of asphalt binder was replaced by epoxy resins. Curing time was determined as 3 and 6 hours for the mixtures containing 40% and 20% of epoxy resins, respectively. From the laboratory tests including wheel tracking, indirect tension fatigue, bending beam, and moisture susceptibility tests, it was concluded that the epoxy asphalt mixtures had superior performance than conventional asphalt mixtures except moisture susceptibility. Also, the performance of the Korean epoxy asphalt mixtures was comparable to the Japanese mixtures. Thermal coefficient, bond strength, and indirect tension tests were conducted to examine the applicability of the Korean epoxy asphalt mixtures to concrete repair. Its adhesion was strong enough to be bonded to surrounding concrete materials and its tensile strength was comparable to the concrete, but thermal expansion coefficient was 5 times greater than the surrounding concrete.

• Elastomers and Composites
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• v.33 no.5
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• pp.324-334
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• 1998

SBR, polyurethane, acryl and epoxy latex were seperately mixed with ethylene-vinylacetate emulsion(EVA) in the range of $0{\sim}50%$ (wt.% ). For the mixtures, the various physical properties were examined. The viscosity of mixtures was mainly influenced by compatability with EVA emulsion, was decreased within 20% (wt.% ) of latex content, and showed the similar values over 20% (wt.% ) of latex content. The workable time of cement mixtures was mainly depended on the reactivity with cement. The formation of film could be only within $30{\sim}40$ minutes from mixing cement. The tack-free time of mixtures was influenced by the sorts of resin and the quantity of cement. The slow order of tack-free time was epoxy mixtures>SBR mixtures>urethane mixtures>acryl mixtures. The pencil hardness of mixtures was $4B{\sim}2H$, represented higher value in cement mixtures than in emulsion state.

• The Journal of the Convergence on Culture Technology
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• v.7 no.3
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• pp.155-161
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• 2021

We surveyed 27 workplaces and 1897 workers and analyzed the correlation between Personal characteristics of workers and Musculoskeletal Symptoms. The presence or absence of Symptoms of Musculoskeletal Disease in workers was based on The Management Target or higher in accordance with the guidelines for The Investigation of Harmful Factors in Musculoskeletal Burdened Work of the Korea Occupational Safety and Health Agency. Personal characteristics were divided into age, work load, housework burden, work experience, leisure type, gender, and marital status. In the survey, correlations were investigated through binominal logistic regression analysis for rank variables of work load, household burden, and work experience, and the significance of the results was confirmed by crosstabulation and chi-square analysis for other nominal variables. And in the case of other variables, there was a slight trend, but it was confirmed that it was not statistically significant. As a result, We confirmed that the incidence rate of Musculoskeletal Disease Symptoms increased as the age of the workers was lower, the higher the workload and housework, if they were women, if they did not engage in leisure activities. However, considering that the results of this study are slightly different as a result of comparing the results of other studies, the data of this study can be used as rough indicators for the prevention of musculoskeletal disorders, but additional research is needed before using it as quantitative indicators.