• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2020년도 봄 학술논문 발표대회
• /
• pp.23-24
• /
• 2020

In this study, the concrete compressive strength estimation system Concrete IoT Management System (hereinafter referred to as CIMS) was developed, and CIMS was applied to domestic field structure slabs and wall concrete to check whether CIMS is practically available and to estimate the accuracy of the initial strength estimation of concrete. As a result, it shows a very high correlation when the compressive strength of the specimen for structural management is compared with the estimated strength of CIMS in terms of integrated temperature, and it is expected to be gradually applied to domestic construction sites in the future.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2020년도 봄 학술논문 발표대회
• /
• pp.25-26
• /
• 2020

In this study, by applying the concrete compressive strength estimation system Concrete IoT Management System (hereinafter referred to as CIMS) to the concrete slab concrete in the domestic field, the purpose of this study is to confirm the practical use of CIMS and to verify the accuracy of estimating the initial strength of concrete. As a result, it shows a high correlation when the compressive strength and CIMS estimated strength of the specimen for structural management are converted and compared with the integrated temperature. However, in order to determine a more accurate experimental constant, it is necessary to consider the results up to 28 days.

• 한국자원식물학회지
• /
• 제27권4호
• /
• pp.359-364
• /
• 2014

충남지역에 자생하는 콩과식물 몇 종의 적정한 채종시기 판단과 발아특성을 평가한 결과는 다음과 같았다. 콩과식물 몇 종류의 종자 성숙도, 착생 종자량, 발아율, 발아일수, 탈립을 고려한 채종적기는 차풀이 10월 초중순, 비수리가 11월 초순, 싸리가 11월 초중순으로 판단되었다. 착생 종자량이 가장 많은 시기는 차풀이 10월 초순, 비수리와 싸리가 각각 11월 초순이었고, 성숙 말기 종자비율이 가장 높은 시기는 차풀이 11월 초순, 비수리와 싸리가 각각 11월 중순이었다. 채종시기별 발아율이 가장 높은 시기는 차풀(99.8%)이 10월 초순, 비수리(68.3%)가 11월 중순, 싸리(24.3%)가 11월 초순이었고, 채종시기별 발아일수가 가장 짧은 시기는 차풀이 10월 중순, 비수리와 싸리가 각각 11월 중순이었다. 공시종자의 발아적온은 차풀이 $15{\sim}35^{\circ}C$, 비수리가 $25{\sim}30^{\circ}C$이었고, 싸리는 발아율이 낮아 발아적온의 판단이 어려웠다.

• 한국작물학회지
• /
• 제40권1호
• /
• pp.44-51
• /
• 1995

도입에 의존하고 있는 풋콩 종자 생산체계를 확립하고자 조숙성 품종인 큰올콩과 풋콩 도입풍종인 Fukura 피두를 평야지（영남농업시험장） 및 고랭지（경남 밀양군, 사자평 ：해발 850m）에 파종시기（5월 15일, 6월 15일, 7월 15일）를 달리하여 생육 및 수량과 병해립 및 저장후 발아력을 조사한 결과를 요약하면 다음과 같다. 1. 파종시기가 빠를수록 협수가 많고 100립종은 무거웠으며 수량도 높았다. 재배지별로는 평야지가 고랭지보다 증수되었고, 큰올콩이 Fukura보다 수량성이 높았다. 2. 남부지방의 산간 고랭지는 평야지에 비해 생육 및 100립종이 저하하고 수량성이 크게 떨어져 평야지보다 불리하였다. 3. 안전립 수량은 파종시기가 빠를수록 높고, 평야지 및 큰올콩품종에서 증수되었으며, 전체 립종에 대한 안전립 비율은 고랭지에서 높게 나타났다. 4. 파종시기에 따른 병해정도는 큰올콩은 뚜렷한 차이가 없었으나 Fukura는 파종기가 빠를수록 나병립율이 높았고, 미이라병은 파종기가 빠를수록 심하게 발생하였으며 자정병은 파종기가 늦을수록 많이 발생하는 경향이었다. 5. 종자의 발아율은 파종기가 늦은 것이 높았으며, 5월 15일에 파종하여 수확ㆍ저장한 종자의 발아율은 매우 낮아 문제시 되었다. 따라서 풋콩 종자생육을 위한 적정파종시기는 수파기의 고온ㆍ다습한 환경을 고려하여 6월 중순경이 좋을것으로 생각되었다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제18권9호
• /
• pp.1249-1254
• /
• 2005

The aim of this study was to determine the effect of maturity stage on the nutritive value of wild mustard straw in terms of chemical composition, in situ, in vitro dry matter degradability and calculated ME. The nutritive values of wild mustard, Sinapsis arvensis hays harvested at three stages were evaluated by chemical composition, in vitro gas production and in situ dry matter degradation methods. Gas production or dry matter (DM) degradation were determined at 0, 3, 6, 12, 24, 48, 72 and 96 h and their kinetics were described using the equation p = a+b(1-e$^{-ct}$). Maturity had a significant effect on both the chemical composition and degradability of wild mustard. Neutral detergent fibre (NDF) and acid detergent fibre (ADF) (p<0.001) increased with increasing maturity whereas the crude protein (CP) (p<0.001) decreased. The gas produced after 96 h incubation ranged between 64.7 and 81.5 ml per 0.200 g of dry matter. The gas production (ml) at all incubation times and estimated parameters decreased with increasing maturity of wild mustard. The gas production at all incubation times and estimated parameters (a, b (a+b), metabolizable energy (ME) and organic matter digestibility (OMD)) were negatively correlated with NDF and ADF. The DM disappearance after 96 h incubation ranged between 50.8 and 76.1%. The in situ DM disappearance at all incubation times and estimated parameters decreased with increasing maturity of wild mustard. The in situ dry matter disappearance at all incubation times and some estimated parameters (c, a, b and effective dry matter degradability (EDMD)) were negatively correlated with NDF and ADF but positively correlated with CP. The nutritive value of wild mustard continually changed as it matured. Wild mustard, harvested at the proper stage of maturity offers considerable potential as a high quality forage for ruminants during the winter feeding period. The present study showed that if higher quality forage is an objective, wild mustard should be harvested at the early flowering stage.

• 한국산학기술학회논문지
• /
• 제22권1호
• /
• pp.149-158
• /
• 2021

본 연구의 목적은 고등학교 학생의 자아효능감과 부모와의 대화가 진로성숙도에 미치는 영향 관계를 알아보고 자아효능감과 진로성숙도 간 학교생활에 만족하는 학생과 만족하지 않은 두 집단 간의 비교연구를 통해 학교와 선생님이 학교생활에서 학생을 어떻게 지도해야 하는지, 학생들의 진로성숙도를 높이려는 노력과 학생들의 학교생활 만족을 위해 학교들의 진로교육에 대한 시사점을 살펴보는 것이다. 실증분석을 위해 한국직업능력개발원에서 2018년 초 실시한 한국교육고용패널(KEEP II) 조사 Data를 활용하였다. 연구결과, 자아효능감은 진로성숙도에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 자아효능감은 부모와 대화에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 부모와의 대화빈도와 내용은 진로성숙도에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 자아효능감과 부모와 대화 변인이 진로성숙도에 미치는 영향은 학교생활에 만족하는 집단과 만족하지 않는 두 집단 간에 유의미한 조절적 작용(Pairwise T-Test -5.439⁎⁎⁎)을 하는 것으로 나타났다.

• 아동학회지
• /
• 제26권2호
• /
• pp.27-41
• /
• 2005

The purpose of this study was to test the reliability and validity of the Infant Montessori Performance Assessment Scales developed by the authors. Subjects of the study consisted of 132 Montessori teachers and 50 infants who were attending Montessori home school throughout the whole country, using census method. Infant's age ranged from 6 to 24 months. Data were analysed by using SAS 8.2 PC program. Statistical methods employed were frequency, Cronbach's alpha, Kappa coefficient, test-retest correlation, construct validity, and concurrent validity. The Cronbach's alpha of 6 sub-scales included physical, creativity, practical life, sense, language, and cognitive education, which ranged from .70 to .86. And the! correlation of the test/re-test was .72. The correlation between the 6 sub-scales of Infant-Montessori Performance Assessment Scales and the total scores of 6 items ranged from .06 to .84. Therefore, the construct validity of Infant Montessori Performance Assessment Scales was verified. The Kappa coefficient of inter-rater reliability was .76. The correlation between the Infant Montessori Performance Assessment Scales and the Standardized Korean Creativity Traits Checklist(K-CTC) and the Korean Child Social Maturity Scales showed non-significant levels of .16 and .12 respectively. Conclusively, Infant Montessori Performance Assessment Scales developed by the authors were verified through the above reliability and validity tests. Specifically the Infant Montessori Performance Assessment Scales showed the relationship of the convergent and divergent validity with the Korean Child Social Maturity Scales and the Standardized Korean Creativity Traits Checklist, respectively.

• 한국패류학회지
• /
• 제1권1호
• /
• pp.5-12
• /
• 1985

The maturity of gonads, early development of the fertilized egg, spawning period, and morphogenesis of larvae in Limnoperua fortunei were studied from October, 1981 to November, 1982 as on attempt to identify its life cycle. 1) Active motility of its sperm was observed at late May, and matured egg could be found at late June. 2) It was estimated that the spawning was occured from late August. This species was belong to the short-term breeder because it finished its spawning within 20 days. 3) It has free-living trochophore and D-shaped larva stage. The shell lengths of early, middle, and D-larval stage were $140.0{\mu}m$, $167.6{\mu}m$ and $210.0{\mu}m$, respectively. The shell heigths of each stage were $97.3{\mu}m$, $137.6{\mu}m$ and $178.2{\mu}m$, respectively.

• 한국수산과학회지
• /
• 제42권6호
• /
• pp.633-641
• /
• 2009

Maturity and spawning of the atka mackerel, Pleurogrammus azonus, was investigated based on the samples collected by gill net and set net in the East Sea from January 2006 to March 2009. Gonadosomatic index (GSI) began to increase in October, and reached a maximum between November and December. After spawning GSI began to decrease from January. The spawning period was from October to January, and main spawning period was from November to December. Annual reproductive cycles of this species could be divided into five successive stages in females; early growing stage (June), late growing stage (July to August), mature stage (September to October), ripe and spent stage (November to January), and recovery and resting stage (January to May). Males showed four successive stages: growing stage (June to August), mature stage (September to October), ripe and spent stage (October to December), and recovery and resting stage (January to May). P. azonus could be one of polycyclic species spawning two times or more during one spawning season. Number of total and mature eggs in the fecundity were proportional to fork length. The fork length at 50% group maturity was estimated to be 26.9 cm.

• Fisheries and Aquatic Sciences
• /
• 제13권4호
• /
• pp.332-339
• /
• 2010

Maturity and spawning of the snailfish, Liparis ochotensis was investigated based on samples collected by gill net in the East Sea of Korea from December 2008 to December 2009. The average total length of L. ochotensis was 63.4 cm and 64.1 cm for females and males, respectively. Gonadosomatic index (GSI) began to increase in July, reaching a maximum in November, then began to decrease in December. Monthly changes in the GSI values of L. ochotensis were similar for females and males. Annual reproductive cycle of this species can be divided into five successive stages in females: early growing stage (May), late growing stage (June to July), mature stage (August to September), ripe and spent stage (September to December), and recovery and resting stage (January to April). Males show four successive stages; growing stage (May to July), mature stage (August to September), ripe and spent stage (September to December), and recovery and resting stage (January to April). Relationship between total length (TL) and fecundity (F) was F=$0.00003TL^{4.002}$ ($R^2$ = 0.703), and F increased with TL. Total length at 50% group maturity was estimated to be 55.8 cm. Our findings suggest that the spawning period takes place from September to December, with the main spawning period occurring from October to December.