• Journal of Crop Science and Biotechnology
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• 제10권3호
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• pp.193-200
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• 2007

Mungbean plants generally have a relatively close canopy, thus a large amount of self-shading can reduce yield due to poor light penetration. Modification of leaflet type can affect leaf canopy and could alter seed yield. Two multiple leaflet mutants were obtained from gamma-ray irradiation and used to study the mode of inheritance related to leaflet types and to evaluate their agronomic features. The cross between large-heptafoliate leaflet with small-pentafoliate leaflet mutants produce all $F_1$ plants with normal trifoliate leaflets. The $F_2$ plants segregated in leaflet size and leaflet number into a 9:3:3:1 ratio of large-trifoliate: large-heptafoliate: small-pentafoliate: small-heptafoliate plants, suggesting that independent loci control leaflet size and leaflet number. Regarding leaflet number, the $F_2$ population can be classified into normal-trifoliate, small-pentafoliate, large-heptafoliate, and small-heptafoliate at the dihybrid ratio of 9:3:3:1. The gene symbols $N_1,n_1$ and $N_2,n_2$ are proposed to represent leaflet number. Since no plant was found with large-pentafoliate leaflets, we hypothesize that the $N_2$ allele expresses pleiotropic effect on both leaflet number and leaflet size. Another possibility is that an additional locus with S and s alleles controls leaflet size and S is tightly linked with $N_2$. The effect of multifoliate leaflet on yield and yield components was evaluated in four mungbean families each with four leaflet isolines under three environments. Averaging across the families and environments, the normal-trifoliate and large-heptafoliate lines gave higher yield than small pentafoliate and heptafoliate ones. These two large leaflet lines also had higher leaf area per plant than the other multifoliate lines. Therefore, the mungbean lines with a greater leaf area, which were likely to intercept more sunlight, gave greater yield. Three AFLP markers that were found to be linked to number of leaflets per leaf, corresponded to the N1 allele of the smallpentafoliate parent.

• 복식
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• 제61권3호
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• pp.63-70
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• 2011

The purpose of this study was to investigate trend of articles on men's fashion in Korea as seen through clothing-related academic journals from 1990 to 2009. For a total of 478 research papers on men's fashion published in 18 clothing-specialized learned society journals, which are KCI-cited journals or candidates thereof The results were as follows: First, With respect to the number of papers on men's fashion from 1990 to 2009, that of the 2000s rapidly increased to 5.2 times that of the 1990s. Second, The number of each area research was ranked aw follows: social psychology marketing 34.1%(163), clothing construction 32.2%(154), design aesthetics 19.7%(94), beauty 7.7%(37), history of clothing 4.8%(23), textile science 1.5%(7.7). Third, Studies on the aesthetics in men's fashion showed a steady increase from 1995, resulting in the number of papers in the 2000s being 12 times that of the 1990s. And, in the 2000s, the subjects explored in the 1990s, such as feminization of men's clothes, gender images, men's suit, etc. were deepened and expanded.

• 한국학교수학회논문집
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• 제17권2호
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• pp.235-249
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• 2014

본 논문에서는 우리나라와 일본의 초등학교 1학년 수학 교과서 <수와 연산> 영역을 비교하고 있다. 그 결과를 바탕으로 우리나라의 초등학교 1학년 수학 교과서 <수와 연산> 영역의 개선을 위해 얻은 시사점은 다음과 같다. 첫째, 두 자리 수의 구성을 설명할 때 먼저 구체물로 나타낸 것을 수학적 표현으로 바꾸고, 그 다음에 그것을 수학적으로 처리하는 것을 고려할 필요가 있다. 둘째, 수의 합성과 분해와 관련하여, '(몇)과 (몇)'이라는 표현을 사용하는 것을 고려할 필요가 있다. 셋째, 등호가 있는 덧셈식과 뺄셈식을 읽을 때, 각각 '합'과 '차'를 사용하여 읽는 방식을 재고할 필요가 있다. 넷째, 첨가 상황과 합병 상황, 제거 상황과 비교 상황을 각각 구별해 주는 표현의 사용을 고려할 필요가 있다. 다섯째, 받아내림이 있는 (십 몇)-(몇)을 설명하기 위해 두 수의 뺄셈을 세 수의 뺄셈 또는 세 수의 혼합산으로 표현하는 과정에서 나타나는 비약을 해소할 필요가 있다.

• 대한수의학회지
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• 제16권2호
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• pp.115-119
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• 1976

The survey was carried out to investigate the average number of days from parturition to conception to 349 calving cases out of Holstein cows in total 154 heads observed. The results were as follows: 1. The average number of days from parturition to conception was $97.41{\pm}8.22$ and it's similar during the period from primipara to 4th calving order, and irregular during on and after 5th. 2. The average number of days from parturition to conception in calving month was observed all through the year: the prolongation among on April and July, and the brief duration among on January and March. 3. In the cases under 50 and 150 days after delivery, the distribution showed 53.56% and 83.91%, respectively, and it's about 20% between 70 and 90 days after delivery.

• 교육시설
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• 제9권1호
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• pp.15-26
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• 2002

According to seventh curriculum, new types of school design have been developed recently. However there are hardly any data of national status about plan and area organization, types and number of rooms of those. On this background, the purpose of this study is to provide fundamental resources for architectural designing and planning of high schools and to recognize national status of plan organizations of high schools through collecting 53 school's standard design drawings(arrangement, plan drawing) which city, province education office drafted for 4 years(from 1997 to 2000) and analyzing them into plan types, building area and type, number and area of rooms. The results of this study are as follows: 1. The range of class number of designed 53 high schools varies from 24 to 36 and 36-class-schools are 47.2% of all. Average number of class is 34.1. As a result we can find out large scale schools are mainly designed. 2. Among 53 schools, 21 schools have the department system but few of them equipped sufficient rooms and their features are very manifold. After recognizing utilization status of each schools, the standards of room type, number and plan organization should be proposed. In terms of plan type for fluent level based transferring class, most of schools are not apt. 3. In the status of type and number of rooms related to class number, range is very wide. So simplification is necessary. 4. The variations of building area, area per a class and area per a student are very large so that standard of adequate area should be established. 5. That every school which has different plan organization from conventional schools exceeds ministry of education's minimum area standards shows those standards cannot cover the diverse plan design of school. So more adequate standards should be proposed. 6. Area and number of Teacher's research room and Home Base are also very manifold from school to school. They are also considered to be simplified immediately.

• 한국신뢰성학회지:신뢰성응용연구
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• 제18권2호
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• pp.143-152
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• 2018

Purpose: In this paper, we propose calculation methods of Maintenance Float (M/F). Results of each method are compared and verified by using commercial tool (OPUS Suite). As modern weapon systems become more expensive, we need to find the most economical and efficient method to achieve the target operational availability (Ao). Methods: Three kinds of methods (Considering the number of CSP, Applying the Poisson distribution, and Applying M&S Tool) are used to find the number of M/F. Three methods (Considering the number of CSP, Applying the Poisson distribution, and Applying M&S Tool) were used to estimate the required number of M/F. The analysis results were verified by SIMLOX. The cost of equipment calculated by each analysis method was compared and the cause of the difference was analyzed. Conclusion: Ao and cost must be considered to find the optimal number of M/F. In general, it costs more to increase availability. But the cost is not necessarily proportional to Ao. Therefore, it is better to compare the calculation method and determine the final MF quantity.

• Animal Systematics, Evolution and Diversity
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• 제28권1호
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• pp.29-35
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• 2012

Two Spirostomum species collected from freshwater in Korea were identified as S. caudatum (Muller, 1786) and S. teres (Claparede and Lachmann, 1858). They are recorded for the first time in Korea. The description was based on the observation of living specimens and protargol impregnated specimens. Diagnostics of these species are as follows. Spirostomum caudatum: body size $400-450{\times}20-30\;{\mu}m$ in vivo, shaped long and slender with a tapered posterior part, highly contractile; macronucleus ellipsoid; adoral zone of membranelles occupied 30% of body length; somatic kineties 14-22 in number. Spirostomum teres: body size $240-460{\times}25-40\;{\mu}m$ in vivo, shaped long and slender with a flattened posterior end, highly contractile; cortical granules arranged in 2-3 rows; adoral zone of membranelles occupied 50% of body length; somatic kineties 20-30 in number; macronucleus ellipsoid; micronuclei 2-3 in number. Spirostomum caudatum and S. teres are the most similar congeners, but they are different in the posterior part of body (tail-like posterior part vs. flattened posterior end), length of adoral zone of membranelles in body length (1/3 vs. 1/2), and the number of somatic kineties (14-22 vs. 20-30). These populations match with European populations in morphological characters.

• 대한수학회지
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• 제46권6호
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• pp.1309-1318
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• 2009

Let k be a positive integer, and let G be a simple graph with vertex set V (G). A Roman k-dominating function on G is a function f : V (G) $\rightarrow$ {0, 1, 2} such that every vertex u for which f(u) = 0 is adjacent to at least k vertices $\upsilon_1,\;\upsilon_2,\;{\ldots},\;\upsilon_k$ with $f(\upsilon_i)$ = 2 for i = 1, 2, $\ldot$, k. The weight of a Roman k-dominating function is the value f(V (G)) = $\sum_{u{\in}v(G)}$ f(u). The minimum weight of a Roman k-dominating function on a graph G is called the Roman k-domination number ${\gamma}_{kR}$(G) of G. Note that the Roman 1-domination number $\gamma_{1R}$(G) is the usual Roman domination number $\gamma_R$(G). In this paper, we investigate the properties of the Roman k-domination number. Some of our results extend these one given by Cockayne, Dreyer Jr., S. M. Hedetniemi, and S. T. Hedetniemi [2] in 2004 for the Roman domination number.

• 품질경영학회지
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• 제14권1호
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• pp.47-52
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• 1986

Slow-moving items whose cost is so high and/or whose demand is so low the optimal policy is to place a reorder immediately whenever a demand occurs. This is a continuous review (S-1,S) inventory policy which means that whenever a demand for an arbitrary number of units is accepted, a reorder is placed immediately for that number of units. This paper show optimal inventory level ($S^*$) when arrivals tend to get discouraged and recommend practical difficulties of deciding stockholding policy of slow-moving items. Also, a simple numerical example is provided.

• 대한수학회지
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• 제6권1호
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• pp.47-50
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• 1969