• Korean Journal of Poultry Science
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• v.14 no.1
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• pp.15-24
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• 1987

A total of 216 day-old broiler chickens were randomly assigned to 6 treatment combined 2 dietary protein regimens (22-20%, 20-18% for starter and finisher, respectively) with 3 times of change (2, 4, 6 weeks) to study the effects of different protein levels and time of change from starter to finisher ration on the performance of broilers. Increasing the dietary protein level resulted in not only a significant increase in the body weight gain and the protein requirement per kg body weight gain, but also an improvement of feed efficiency. However abdominal fat accumulation was decreased by adding incremental levels of protein. On the other hand, the earlier time of change from starter to finisher ration, less\ulcorner\ulcornerbody weight gain and the abdominal fat accumulation. But feed intake and viability were not affected by the dietary protein level and/or the time of change from starter to finisher ration. Income was highest for birds fed 22% and 20% protein diet' starter and finisher, respectively changed from starter to finisher at 4weeks of age.

• Journal of the Korean association of regional geographers
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• v.12 no.1
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• pp.16-30
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• 2006

In terms of world system theory, the historical period of Yanbian area was divided into 3 parts: Japan colonial period which was assigned to the periphery of world system, socialist period which escaped from the world system, and the reform-open period that was reincorporated to world system. The cultural character of each period was studied. The conclusions are as follow. During the period of periphery of world system, Yanbian area as an area where the massed Korean people lived, was dominated by Korean peninsular culture. However, Yanbian area was also affected by the Japanese and Chinese cultural assimilation policy. During the period that Yanbian area aparted from the world system, it was affected by the requirement of unique socialist culture assimilation, and traditional cultures were hard to keep. During the period of reincorporation to the world system with lighten of minority policy by Chinese government, traditional national culture begin revived, but due to extend intercourse of Yanbian with China mainland and Republic of Korea, China-Korean culture of Yanbian area was strongly affected by Chinese and Korean culture too.

• Journal of Korean Ophthalmic Optics Society
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• v.15 no.4
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• pp.373-379
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• 2010

Purpose: The purpose of this study was to investigate the effect of vision training using MYSTERY CIRCLE system on patients with exophoria and intermittent extropia. Mehtods: The vision training observation group consists of 26 clients who had exophoria (n=18) and intermittent extropia (n=8) without opthalmic diseases or vertical phoria. Our clients took each vision training once a week for eight weeks and were investigated for the symptoms changes of binocular vision. Results: According to the results, MISTERY CIRCLE vision training methods improved the binocular vision function and sensation symptoms. For Worth 4 Dot test, Titmus test and red lenses showed fusion rate changes. Conclusions: The study proved that MISTERY CIRCLE vision training system for patients with binocular vision was effective for the improvement of the binocular vision symptoms of these patients.

• The Korean Journal of Applied Statistics
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• v.30 no.3
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• pp.417-426
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• 2017

It is important to predict the flowering dates of Japanese cherry and autumnal dates in Korea. Flowering date is decided by heating requirement with daily maximum and minimum temperature used to calculate the pre-determined heating requirements for flowering. Recent, changes in climate have impacted the flowering season of Japanese cherry in Korea. When compared with the current normal, the flowering of Japanese cherry is expected to be about 10 days earlier than in near future normal years. In this paper, we first consider a linear model based on meteorological data that predicts the flowering date and then incorporate a spatial structure into the model. Real data analysis indicates that the proposed approach provides more reasonable predicted dates.

• Korean journal of food and cookery science
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• v.4 no.1
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• pp.47-52
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• 1988

The chemical composition of 13 different Korean green tea products made from various kinds of tea trees and processing methods was analyzed. The distinct changes in the chemical composition noticed by the harvesting time of tea leaves. The content of crude protein decreased and the contents of crude fat and crude fiber increased as the harvesting runs proceeded. The contents of tanic substances and total sugar tended to increase while caffein content decreased as the runs proceeded. The contents of some organic acids reached to the maximum at the second run of harvest. Steamed leaves had higher chlorophyll content than roasted one, and it resulted in the brighter green and more yellow color of steamed tea products.

• Journal of the Korean Society of Clothing and Textiles
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• v.20 no.1
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• pp.76-86
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• 1996

복식사 연구의 한 방법으로서, 문헌을 통하여 다량의 정보 수집이 가능할 경우, 사회과학의 분야에서 사용되어 온 내용분석법을 도입하여 정보의 수량화를 꾀할 수 있다. 본 연구에서는 내용분석법을 이용하여 1856년부터 1870년에 이르기까지 미국 여성의 평상복(daydress)중 재킷과 치마의 유행 경향을 당시의 대포적인 패션 잡지인 Godey's Ladies Book과 Perterson's Magazine의 패션 삽화를 토대로 분석하였다. 1856∼1870년은 미국의 남북전쟁 발발 5년 전부터 남북전쟁 직후 5년까지 의 15년간의 기간을 이르며, 해당 15년은 전쟁 전, 전쟁 중, 그리고 전쟁 후의 5년간씩의 3 시기로 나뉘어졌다. 연구의 목적은 여성 평상복의 디자인이 위의 기간 동안 남북전쟁의 한 영향으로서 군복 '라일의 경향을 띄게 되는지의 여부를 조사하는 것이다. 군복 스타일의 경향은 몸에 꼭 맞는 실루엣(fitted silhouette), 에플렛(epaulet), 스텐딩 칼라(standing collar), 더블 여밈 (double-breastedness) 다수의 단추의 사용 및 장식(buttons)으로 정의되었다. 여성스러운 스타일의 경향은 풍성한 실루엣 (full silhouette), 플라운스가 된 치마(flounced skirt), 그리고 러플/fp이 스/리본 (ruffles/lace/ribbons)의 사용 여부로 정의되었다. 연구의 초점은 객관적이고 체계적인 문헌 정보의 수집 방법을 수립하는 데 있었으며, 수집된 자로는 각 변수의 빈도 분포포에 의해 조사되었다. Fitted silhouette, epaulet, 그리고 standing collar는 제 3시기에 가장 많이 나타났고 제 1시기에 가장 적게 나타났다. 여성스러운 스타일에 있어서 full sihouette과 trounced skirt는 제 1시기에 가 장 많이 보였고 전쟁 당시와 전후에 점차적으로 적게 나타났다. Buttons나 double breastedness 등은 제 2시기에 가장 많이 보이고 제 3시기에는 오히려 가장 낮은 빈도수를 보였다. 반면에 ruffles/lace/ribbons는 fitted silhouette 등의 군복 스타일의 변수와 더불어 제 3시기에 가장 많이 보인 것으로 분석되었다. 전반적인 유행의 경향에 있어서, 군복 스타일의 변수와 여성스러운 경향의 변수를 각각 종합하여 분석해 보면, 제 2시기를 중심으로 전자의 유행은 점차적으로 증가하고 후자의 유행은 감소되고 있는 것을 볼 수 있다. 그러나 당시 미국 패션은 유럽 왕실의 유행에 의해 크게 영향을 받은 것을 감안할 때 본 연구의 결괴는 서양 복식의 역사의 선상에서 조심스럽게 해석되어야 할 것 이다.

• The Journal of the Petrological Society of Korea
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• v.14 no.1
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• pp.38-44
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• 2005

Hornblende $^{40}Ar/^{39}Ar$ age of $113.4{\pm}2.4(2{\sigma})$ Ma was determined from the volcanic pebble of the Silla Conglomerate which belongs to the Hayang Group of the Cretaceous Gyeongsang Supergroup. This age corresponds to the top of Aptian. Based on the reported age information, onset and duration of deposition of the constituting formations of the Hayang Group are constrained as follows; deposition of the Jindong Formation started from ca. 96~97 Ma and lasted for about 15 Ma. Therefore, Jindong Formation was deposited since Cenomanian to Santonian and it is likely to be extended to the early Campanian. We propose 81~80 Ma, which is in early Campanian, as the boundary between Hayang and Yucheon Groups. We suggest that the Silla Conglomerate was deposited during the early Albian and the Haman Formation was deposited during the rest of the Albian and also during the Cenomanian. The Chilgok Formation seems to be deposited during the late Aptian.

• Food Science and Preservation
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• v.14 no.6
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• pp.624-632
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• 2007

Changes in proximate composition, amino acid, free sugar, reducing sugar and vitamin contents of Curcuma longa L. (autumn woolgeom in Korean) and Curcuma atomatica Salib (spring woolgeom) were investigated according to picking time. Moisture, crude ash, crude protein and crude lipid were increased and non nitrogen substances was decreased by extending the picking time. Contents and ratio of total amino acid to essential amino acids was increased by extending the picking time. Free amino acid was increased by extending the picking time. Ratio of essential amino acids to total amino acids was decreased. Fructose was gradually increased, and then glucose, sucrose and total free sugars were decreased by extending the picking time. Amino acid and sugar contents of Curcuma longa. L. were higher than those of Curcuma atomatica Salib. In contents of vitamin C and $B_1$, Curcuma longa L. was decreased and Curcuma atomatica Salib was increased by extending the picking time.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.197-197
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• 2012

본 연구에서는 대기 순환패턴 및 수문 환경변화에 영향을 미치는 주요인자인 El Ni$\tilde{n}$o-Southern Oscillation (ENSO)의 서로 다른 형태인 Warm-pool (WP) El Ni$\tilde{n}$o, Cold-tongue (CT) El Ni$\tilde{n}$o에 따른 한강유역의 봄철 (March~May)과 여름철 (June~August) 강수 및 유출의 특성을 분석하였다. 봄철 강수량의 경우, WP El Ni$\tilde{n}$o 시기에 증가추세를 보이며, 강수의 변동특성 또한 크게 나타났다. 여름철 강수량의 경우, CT El Ni$\tilde{n}$o 시기에는 평년보다 대체로 건조한 경향을 보이나, WP El Ni$\tilde{n}$o 시기에는 유역 전체에서 습한 경향을 보였으며 강수의 변동성은 매우 작은 것으로 분석되었다. 봄철 유출량의 경우, CT El Ni$\tilde{n}$o 시기와 WP El Ni$\tilde{n}$o 시기에 모두 평년치보다 크게 나타났으며, WP El Ni$\tilde{n}$o 시기에 한강 남부 대부분 유역에서 유출량이 통계적으로 유의한 증가 경향을 보였다. 여름철 유출량의 경우, CT El Ni$\tilde{n}$o 시기에는 대부분 유역에서 평년치보다 감소하나 수문 변량의 변동성은 큰 것으로 분석되었다. WP El Ni$\tilde{n}$o 시기에는 거의 모든 유역에서 유출이 증가하는 것으로 나타났으며, 특히 13개 중권역에서는 유출의 변동성이 작고 통계적으로 유의한 증가패턴이 분석되었다. 따라서 본 연구는 서로 다른 두가지 형태의 El Ni$\tilde{n}$o패턴에 대하여 한강유역의 봄철과 여름철 수자원 변동성에 민감하게 영향을 미치고 있음을 확인하였으며 수자원의 효율적인 예측 및 관리와 안정적인 용수공급을 위한 수문기상인자와 수문자료간의 관계 규명에 유용하게 활용될 것으로 기대한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.5
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• pp.2573-2578
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• 2014

An experimental study was performed to investigate the characteristics of combustion pressure and exhaust emissions when the pilot injection timing and EGR rate were changed in a CRDI 4-cylinder diesel engine using bio-diesel blended fuel. The pilot injection timing and EGR rate have a significant impact on the combustion and emission characteristics of diesel engine. In this study, the pilot injection timing and EGR rate variation were conducted to 2000rpm of engine speed with fuel of bio-diesel blended rate 20%. In these experimental results, IMEP was shown maximum pressure at pilot injection timing BTDC$10^{\circ}$ combustion pressure and heat release rate were decreased in proportion to increase of EGR rate under the same pilot injection timing conditions. The NOx emission was decreased with increasing the EGR rate without influence on pilot injection timing. However, soot emission was reduced to a minimum at pilot injection timing BTDC$20^{\circ}$.