• 동아시아식생활학회지
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• 제23권5호
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• pp.519-532
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• 2013

The purpose of this study was to make a comparative analysis of dietary habits, snacks, eating out and fast-food intake between students with a relatively early sexual maturity and others with a relatively late sexual maturity in a bid to grasp the impact of dietary behaviors on sexual maturity. The subjects in this study were 565 boys and girls who resided in Seoul and Gyeonggi province. They included fifth- and sixth-grade school children and seventh-grade middle school students. To classify the selected students according to the level of sexual maturity, the students of the same month age were divided into two groups in consideration of the stage of their sexual maturity and that of the other age groups. The early mature group was significantly taller and weighed more than the late mature group irrespective of gender. According to Tanner stages, the boys of the early mature group reached a 3.03 stage of sexual maturity when the sexual organs were taken into account, and those of the late mature group reached a 1.50 stage of sexual maturity. The girls of the early mature group reached a 3.43 stage of sexual maturity on the basis of breast, and those of the late mature group reached a 2.73 stage of sexual maturity. Concerning eating out, the early mature group ate out more frequently than the late mature group. In regard to snacks, the early mature group had a snack more often. The findings of the study indicated that there were differences in physical development and some dietary behaviors according to sexual maturity. The early mature group had a snack and ate out relatively more often than the late mature group, which showed that some dietary behaviors had an impact on the sexual maturity of the teens who arrived at the age of puberty.

• 한국초지조사료학회지
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• 제16권4호
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• pp.291-298
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• 1996

This study was carried out at Crop Experiment Station in 1993 and 1994. The objective of this study was finding out variation of growth and yield of corn according to maturity. Hybrids of corn used in this study were early maturing corn Comet80, Elite90, Royaldent IOOT, Royaldent T$\times$llO, P3525, P3394, medium maturing corn Royaldent 120T. and late maturing corn Jungbuok, P3144W. G4743. Stalk height, leaf number, ear weight, stover weight, and TDN yield of early maturing corn were linearly increased with prolonged maturity in 1993 growing season. Leaf number, and stover weight of early and late maturing corn were linearly increased with prolonged maturity in 1994 growing season. But ear weight of late manuring corn was not increased as much as that of early manuring corn with prolonged maturity. Increase of total DM and TDN yield of late maturing corn was due to stover weight increase compared with ear weight increase of early maturing corn. Leaf number and stover weight were highly correlated with silk (Growing Degree Days) GDD.

• 수산해양교육연구
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• 제28권4호
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• pp.1076-1088
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• 2016

This study was to validate the WSBS_PECT (Workplace Spirituality Belief Scale for Prospective Early Childhood Teacher) using discriminant analysis on prospective early childhood teachers' happiness and career maturity. The data from 523 prospective early childhood teachers were analyzed statistically through t-test and binary logistic regression model. The results indicated that 1) the higher group in workplace spirituality belief significantly gets more scores of happiness and career maturity than the lower group, 2) 1 factors of the WSBS_PECT has discriminant power on prospective early childhood teachers' happiness, and 3) 2 factors ('meaning for life' and 'belief on calling for ECE teacher job') of the WSBS_PECT are effective to discriminate prospective early childhood teachers' career maturity. Further statistical works are supplementary needed to validate the WSBS_PECT and to increase its' feasibility.

• 서비스연구
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• 제8권1호
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• pp.103-122
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• 2018

본 연구의 목적은 금융마케팅 서비스에서 투자자들이 미흡하게 느끼는 ELS 상품이 실제로 획득할 수 있는 수익률이 얼마나 되는지를 분석하여 ELS에 대한 투자효과를 규명함으로써 ELS 투자방향을 제시하는데 있다. 연구방법은 스텝다운형 ELS를 대상으로 2001년 1월부터 2017년 8월까지 200개월 동안 만기 3년의 조기상환조건 달성확률, 만기상환조건 달성확률, 조기상환추정수익률, 만기상환추정수익률을 산출하였다. 분석결과는 조기상환조건 100% 달성확률은 74.5%이었으며, 조기상환조건 95%는 달성확률이 83.0%, 90%는 89.5%, 85%는 92.5%, 80%는 96.5%, 75%는 97.5% 이었다. 가장 낮은 75% 경우에 만기까지 보유할 확률은 2.5%인 것으로 분석되어 조기상환조건이 달성될 확률이 높았다. 만기도래했을 때 주가상승률이 만기상환조건 65% 이내에 있을 확률은 98.5%이었으며, 만기상환조건 60%, 58%, 57%, 55%, 50%, 45%는 달성확률이 100% 이었다. 만기상환조건 65%는 원금손실 리스크가 1.5%정도 있는 것으로 분석되어서 만기에 약정된 수익률을 달성할 확률이 높았다. ELS 투자의 유의방안으로는 만기상환조건의 비율이 낮은 상품을 선택하고, 조기상환조건 비율이 높은 상품을 선택해야 하며, 주가지수가 박스권 형성이 예상 될 때 투자하는 것이 유리하다.

• 콘크리트학회지
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• 제8권3호
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• pp.197-207
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• 1996

성숙도는 콘크리트의 양생 온도이력에서 구해지는 것으로 초기강도 예측을 위한 하나의 유용한 지표가 될 수 있다. 즉 성숙도 이론은 배합이 동일할 때 성숙도 값이 같으면 강도값은 같다는 이론이다. 본 연구에서는 성숙도 법칙의 이론적 전개과정을 살펴보고 그 값을 계산하기 위하여 가장 널리 알려진 Nurse-Saul함수를 검토하였다. 또한 성숙도 함수와 기준온도(datum temperature) 설정을 위한 일련의 포괄적인 실험연구를 수행하였다. 성숙도를 강도값에 연관시키기 위한 여러 가지 성숙도-강도함수를 비교해보고 그 장단점을 분석해 보았으며 이를 통하여 유용한 강도예측함수를 제안하였다. 성숙도 이론의 적용에 있어서 고려해야 할 변수들을 도출하기 위하여 양생조건과 시멘트의 종류, 그리고 물-시멘트비등을 달리 하였으며 이 경우에는 습도나 초기양생온도 등이 변수로 채택되었다. 마지막으로 제안된 함수의 타당성과 정확성을 검증하기 위하여 콘크리트 슬래브를 타설하고 시간단계별로 콘크리트 코아를 채취하여 예측된 강도값과 비교하여 보았다. 본 논문은 실제 콘크리트 구조물의 초기강도 예측을 위해 매우 유용할 것으로 사료되며 현장품질관리에 효율적으로 활용할 수 있을 것으로 기대된다.

• 한국초지조사료학회지
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• 제17권3호
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• pp.305-314
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• 1997

Nineteen clones of Jerusalem Artichoke (JA) from several countries were collected through the series of experiments about JA started in 1979. Collected clones were screened for adaptibility in Korea and showed introduction path way. The results about an ecological response of collected clones including flowering, tuberization, biomass production, sugar contents and grouping of collected clones for use of genetic material were as follows; 1. Nineteen clones collected were ffom Korea(2), Japan(l), USA(Z), Canada(2), France(4), Germany(7), and USSR(1). 2. Through the characteristics of top collected clones were divided to the types of branch-non branch, short and long plant height, and early and late maturity. Tuber characteristics were mainly grouped to the types of white skin color-violet skin color, clusters-single unit, round-elongate, and knotty-smooth. 3. Total sugar yields 6-om top at flowering time were 490 - 630kgl10a and 6-om the tuber were 420 -490 kg/ IOa through the high yielding clones. The top-high yielding clones were Mammoth French White, Fuseau 60, Nahodka, and JA3. The higher tuber yields were got from the clones of D- 19, Colombia, Bianka and Mammoth French White. 4. Collected clones were grouped to three and first group was characterized to early maturity and short plant height and second group to medium and finally, third group to late maturity and high plant height. 5. High yielding of top was 6-om the I group of early maturity and short plant height and high yielding of tuber h m III group of late maturity and high plant height.

• 한국초지조사료학회지
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• 제24권4호
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• pp.309-316
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• 2004

본 연구는 파종기가 다른 추파호밀의 Feekes scale에 의한 생장발달을 분석하기 위하여 수행하였다. 시험배치는 10처리 3반복의 분할구배치로 주구에는 9월 30일과 10월 15일의 파종시기를, 세구로는 'Kodiak', 'Koolgrager', 'Danko', 'Homil22', 'Olhomil' 품종을 두었다. 초장은 조기파종이 만기파종보다 높았으며, 공시품종간에는 조생품종이 가장 높았다. 분얼경수는 조기파종시에 48.0개로 만기파종시의 24.3개보다 높았으며, 공시품종간에는 만생품종이 다른 품종보다 높게 나타났다. 생장발달 분석에 있어서 조기파종이 만기파종보다 3일 빨랐다. 조기파종시에는 조생품종인 'Olhomil'이 만생품종인 'Danko' 보다 숙기가 빨랐으며, 만기파종시에도 조생품종인 'Olhomil' 및 'Koolgrager'가 빠른 숙기를 보여주었다. 그러므로 시험에서 얻은 결론은 추파용 호밀의 생장과 발달단계를 Feekes scale로 비교한 결과 'Olhomil' 및 'Koolgrazer'는 조생종,'Homil22'는 중생종 그리고 'Kodiak' 및 'Danko'는 만생종으로 분류가 가능했다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권12호
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• pp.1705-1711
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• 2001

Silage corn (Zea mays L) is grown extensively in livestock operations, and many managements focus on forage yield. This experiment was conducted at Seoul National University (SNU) Experimental Livestock Farm, Suwon in 1998. We determined the effect of planting date and harvest stage on forage yield and quality responses of corn hybrids (five relative maturity groups). The five maturity groups (100 d, 106 d, 111 d, 119 d and 125 d) were planted on 15 April and 15 May, and harvested at maturity stages (1/3, 1/2 and 2/3 kernel milkline). Whole plant dry matter (DM) and ear percentages had significant differences among corn hybrids. Ear percentages of early maturing corns (100 d and 106 d) were higher than for other hybrids. Ear percentage at the early planting date was higher than that at the late planting date for all corn hybrids. The DM and total digestible nutrients (TDN) yields of the 106 d and 111 d corn hybrids were higher than other hybrids, and the DM and TDN yields at the early planting date were higher than that at the late planting date. The acid detergent fiber (ADF) and neutral detergent fiber (NDF) percentages were greater for the late maturity corn hybrids. For plants of the early planting date, the ADF and NDF percentages were lower than for those of late planting date for hybrids. From the comparison among harvest stages, ADF and NDF percentages were decreased as harvest stage progressed. The TDN, net energy for lactation (NEL), and cellulase digestible organic matter of dry matter (CDOMD) were decreased as maturity of corn hybrid delayed. The TDN, NEL, and CDOMD values at the early planting date were higher than those at the late planting date among for corn hybrids. From the comparison among harvest dates, TDN, NEL, and CDOMD values were increased as harvest stage progressed. The correlation coefficient for DM percentage of grain at harvest with DM and TDN yields were 0.68*** and 0.76***, respectively. And the correlation coefficient for ear percentage with ADF, NDF, and CDOMD were -0.81***, -0.82*** and 0.73***, respectively. Our study showed differences of silage corn in forage production and quality resulting from hybrid maturity, planting date, and harvest stage. We believe that for the best silage corn, selection of the hybrid and best management practices are very important.

• 한국작물학회지
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• 제35권6호
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• pp.548-558
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• 1990

Physiology and genetics of early maturity in cereals are the subject of practical as well as scientific interest for agronomist and plant breeders, Thorough understanding of the true nature of such a complex character requires physiological and genetical knowledge about the internal factors, which are closely bound up with and react to some particular external or environmental factors. From the practical point of view. experiments should be conducted under controlled conditions. especially the day length and temperature, so that the genotypic differences pertaining to these factors may be discerned. Takahashi and Yasuda (1958, 1970) maintained that at least three physiological factors were responsible for determining earliness in barley. namely. (1) spring and winter habit of growth or vernalization requirement, (2) ogitioeruiduc response or sensitivity to short-day, and (3) earliness factor in a narrow sense or minimal vegetative growth. The same situations were true in common wheat also (Yasuda and Shimoyama, 1965), In this report. physiology and genetics of internal factors and their relations to the time of heading in the field will be presented with some problems concerning differences in mechanism of early maturity between barley and wheat.

• 한국연초학회지
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• 제5권2호
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• pp.25-32
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• 1983

To obtain basic information on the breeding of burley tobacco, classification of 41 varieties was carried out by using the cluster analysis of correlation coefficients and taxonomic distance based on twenty-one agromonic characters. Eight characters, such as days to flowering, length of flower axis, internode length, leaf length, yield, leaf angle to stem, vein angle to midrib and plant height, were useful in monothetic classification. Forty-one varieties were classified into four groups (I, II, III and IV) with weighted variable group method (WVGM ) and weighted jai. group method(WPGM), whereas the results classification of 33 varieties among them by WVGM were coincident with the results by WPGM. As for the characteristics of each group, group I related to late maturity, tall height and high yield, group II related to intermediate maturity, tall height and low yield, group 19 related to early maturity, intermediate height and low yield, and group W related to early maturity, short height and intermediate yield.