• 한국작물학회지
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• 제48권2호
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• pp.120-126
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• 2003

Four different rice varieties, Sindongjinbyeo, Dongjin #1, Saegyehwabyeo, and Iksan 467, were transplanted under three different nitrogen levels and two different seedling numbers per hill to obtain basic information on panicle traits under different cultural conditions and to propose the ideal panicle structure in Japonica rice. Sindongjinbyeo and Iksan 467 were characterized by more primary rachis branches (PRBs) per panicle and more grains on PRB than other cultivars. The two varieties also had fewer secondary rachis branches (SRBs) per PRB and fewer grains on SRB per PRB. These characteristics, consequently, resulted in higher ripened grain rate, contrary to that of Dongjin #1 and Saegyehwabyeo. In the correlation coefficient analysis, PRB number per panicle and grain number on PRB per panicle were positively correlated with ripened grain rate, while SRB number per panicle, number of grains on SRB per panicle, SRB number per PRB, number of grains on SRB per PRB and grain number per panicle were negatively correlated with ripened grain rate. Therefore, the number of grains on PRB per panicle, SRB number per PRB and the number of grains on SRB per PRB were the appropriate criteria for determining and achieving higher ripened grain rate in rice. High ripened grain rate over 90% was obtainable with over 12.5 PRBs per panicle and 63 grains on PRB per panicle, and with under 1.7 SRBs per PRB, 5 grains on SRB per PRB, 130 grains per panicle, and 14 panicles per hill. The study recommended that for over 90% high ripened grain rate, the critical limiting factors should be under 2 SRBs per PRB, 6 grains per PRB, and 130 grains per panicle, irrespective of the PRB number per panicle and the number of grains on PRB.

• 대한수학교육학회지:학교수학
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• 제5권3호
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• pp.385-399
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• 2003

현재 우리 나라 수학 초등학교 교육과정에서 자연수는 측정과 무관한 일대일 대응 조작이나 수세기를 통하여 지도되고 있으며 분수는 측정이 부분적으로 개재된 방식으로 지도되고 있다. 이러한 지도 방식의 가장 큰 문제점은 자연수와 분수가 분리된다는 점이다. 이러한 문제점을 극복하고자 양의 측정을 통하여 자연수와 분수를 가르칠 것을 주장한 대표적인 인물이 Dewey와 Davydov이다. 이 논문에서는 Dewey와 Davydov의 주장에 근거하여 양의 측정을 통한 자연수와 분수 지도 방법을 개략적으로 제시하였고, 그것과 현재 우리나라 교육과정에서 자연수와 분수를 지도하는 방법과의 차이점을 고찰하였다. 이를 토대로 양의 측정을 통한 자연수와 분수 지도 방법의 교수학적 의의를 다음과 같이 파악하였다. 첫째, 양의 측정활동으로부터 자연수와 분수 개념이 분화된다. 둘째, 자연수에서 분수로의 전이과정이 필연성을 띤다. 셋째, 자연수와 분수 그리고 그것들의 하위 분야가 긴밀하게 연결된다.

• 대한수학회보
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• 제41권1호
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• pp.95-107
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• 2004

In this paper, we consider fuzzy number-valued functions and fuzzy number-valued Choquet integrals. And we also discuss positively homogeneous and monotonicity of Choquet integrals of fuzzy number-valued functions(simply, fuzzy number-valued Choquet integrals). Furthermore, we prove convergence theorems for fuzzy number-valued Choquet integrals.

• Journal of applied mathematics & informatics
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• 제34권1_2호
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• pp.49-60
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• 2016

In this paper, two different approaches to chromatic number of a bipolar fuzzy graph are introduced. The first approach is based on the α-cuts of a bipolar fuzzy graph and the second approach is based on the definition of Eslahchi and Onagh for chromatic number of a fuzzy graph. Finally, the bipolar fuzzy vertex chromatic number and the edge chromatic number of a complete bipolar fuzzy graph, characterized.

• 대한수학회논문집
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• 제25권1호
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• pp.37-49
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• 2010

In this paper we introduce the integration of scalar valued functions with respect to a generalized fuzzy number measure which we call the generalized fuzzy number valued Bartle integral. We first establish some properties of the generalized fuzzy number measures and then study the generalized fuzzy number valued Bartle integrals.

• Korean Journal of Mathematics
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• 제14권1호
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• pp.85-93
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• 2006

A good arithmetic random number generator should possess full period, uniformity and independence, etc. To obtain the excellent random number generator, many researchers have found good parameters. Also an initial seed is the important factor in random number generator. But, there is no theoretical guideline for using the initial seeds. Therefore, random number generator is usually used with the arbitrary initial seed. Through the empirical tests, we show that the choice of the initial values for the seed is important to generate good random numbers.

• 대한수학회보
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• 제35권1호
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• pp.83-89
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• 1998

Using the list of all imaginary quadratic fields with class number 1, 2, 3 and 6, we determine all imaginary bicyclic biquadratic number fields of class number 3. There are exactly 163 such fields and their conductors are less than or equal to 163 $\cdot$883.

• 한국작물학회지
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• 제14권
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• pp.41-45
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• 1973

본 시험은 중부지방에서 담수직파재배에 알맞은 파종립수를 구명함과 파종립수에 EK른 수량 및 수량구성요소의 변이를 알고져 1972년에 수행하였던 바 그 결과를 요약하면 다음과 같다. 1. 최고분얼수는 밀파할수록 직선적으로 증가하여 280립 파종구에서 최고수치를 보였고 그 이후는 점차 감소되었으며 분얼에 대한 경합은 $m_2$당 280립이상 파종구에서 뚜렸했다. 2. 유효경비율은 $m_2$당 120립부터 280립 파종구까지는 파종밀도가 증가될수록 감소되다가 그 이후는 점차 증가되었다. 3. 최고분얼수가 $m_2$당 1,000개 이하에서는 얼자간 경합이 적었다. 4. 수수와 파종립수는 현저한정(+)의 상관이 인정되었고 수수와 일수영화수, 수수와 동숙비율은 (-)의 상관 경향이었다. 5. 수량과 $m_2$당 영화수는 r=0.929이며 수량과 수수는 r=0.695, 수수와 $m_2$당 영화수는 r=0.796이었다. 또한 수량과 수량구성요소간의 순위상관을 보면 수량과 수수가 가장 상관이 높았으며 (r=0.954_ 담수직파에서 수량을 지배하는 요인은 수수이었다. 6. 수량은 $m_2$당 280립 파종구에서 최고를 나타냈다.

• 대한산업공학회지
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• 제20권4호
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• pp.65-72
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• 1994

An independent set of nodes is a set of nodes no two of which are joined by an edge. An independent set is called maximal if no more nodes can be added to the set without destroying its independence. The greatest number of maximal independent set is the maximum possible number of maximal independent set of a graph. We consider the greatest number of maximal independent set in connected graphs with fixed numbers of edges and nodes. For arbitrary number of nodes with a certain class of number of edges, we present the connected graphs with the greatest number of maximal independent set. For a given class of number of edges, the structure of graphs with the greatest number of maximal independent set is that the two components are completely joined; one consists of disjoint triangles as many as possible and the other is the complete graph with remaining nodes.

• 한국전산응용수학회:학술대회논문집
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• 한국전산응용수학회 2003년도 KSCAM 학술발표회 프로그램 및 초록집
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• pp.7-7
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• 2003

We studied closed set-valued Choquet integrals in two papers(1997, 2000) and convergence theorems under some sufficient conditions in two papers(2003), for examples : (i) convergence theorems for monotone convergent sequences of Choquet integrably bounded closed set-valued functions, (ii) covergence theorems for the upper limit and the lower limit of a sequence of Choquet integrably bounded closed set-valued functions. In this presentation, we consider fuzzy number-valued functions and define Choquet integrals of fuzzy number-valued functions. But these concepts of fuzzy number-valued Choquet inetgrals are all based on the corresponding results of interval-valued Choquet integrals. We also discuss their properties which are positively homogeneous and monotonicity of fuzzy number-valued Choquet integrals. Furthermore, we will prove convergence theorems for fuzzy number-valued Choquet integrals. They will be used in the following applications : (1) Subjectively probability and expectation utility without additivity associated with fuzzy events as in Choquet integrable fuzzy number-valued functions, (2) Capacity measure which are presented by comonotonically additive fuzzy number-valued functionals, and (3) Ambiguity measure related with fuzzy number-valued fuzzy inference.