• 한국자원식물학회지
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• 제19권6호
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• pp.697-699
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• 2006

To find out the best complex fertilizer for high yielding of rapeseed crop, experiment was conducted on complex fertilizers at the experiment field in upland of rapeseed in Mokpo Experiment Station, Nat'l Institute of Corp Science, RDA, Korea. Experiment was laid out in randomized complete block (RCBD) design. The effects of complex fertilizer (22-22-11) on the number of branches, pod length, percentage of seed set and seed yield were highest but on the plant height, ear length, and number of pods per ear were negligible. On th basis of the results reported above, for getting higher yield of rapeseed crop, among the tested fertilizers complex fertilizer (22-22-11) gave the superior performance and is recommended for application.

• 전자공학회논문지C
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• 제34C권2호
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• pp.12-18
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• 1997

An efficient synthesis method of cellular architecture FPgA is proposed in this paper. To generate a logical representation called complex term which is to be directly mapped onto the cellular architecture FPGA, and SO or ESOP minimization tool was used in previous methods. Instead, we use a logic function transformed into BDD (binary decision diagram) in the actual generation of the complex temrs. In this process it estimates the cost(i.e. the number of complex terms) for three branches, 0-branch and 1-branches. This process is continued over the whole BDD to do such computation, and we observed that the number of complex terms has been reduced compared to the previous results.

• 한국중재학회지:중재연구
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• 제9권1호
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• pp.139-160
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• 1999

International commercial arbitrations have developed into a simple form in which both parties involved in the dispute by a contract intend to solve the dispute through the legal arbitration system. however nowadays the above traditional form taken by international projects are rarely seen and instead the form of complex arbitration in which many parties are involved has become more and more universal. The complex arbitration means not only many-sided parties concerned but also means a plural number of contract involved in conflicts, a plural number of issues involved in conflicts and a plural number of contracts though their contractors are not in a plural number. However in this report the complex arbitrations will be studied into categories as follows : 1. Pure multi-issue situations, 2. Pure multi-party situations, 3. Pure multi-contract situations. A Pure Multi-Issue arbitration basically includes a plural number of claims between the two parties concerned. A Pure Multi-party case classically presupposes an arbitration clause which involves a plural number of parties concerned. After Party A takes a legal proceeding and then Party B institutes a request to Party C in the above proceeding. In that case the problem arises on whether it is allowed to do so or not. A Pure Multi-Contract case presupposes that when Party A and Party B have independent arbitration clauses based on separate contract relations, respectively, the problem is whether both above-mentioned proceedings can be unified into one or not. As for the above-mentioned complex arbitration, though international treaties are being formed, including the WTO treaties, the NAFTA treaties, the Mercosur treaties and others, legal regulations and customs have not yet been formed domestically. The institutional preparations will be necessitated in consideration of national legal status as well as international treaty relations.

• 호남수학학술지
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• 제35권4호
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• pp.809-817
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• 2013

We research properties of a corresponding Cauchy theorem of hyperholomorphic functions in an open set of product complex spaces, in the sense of complex Clifford analysis.

• Journal of applied mathematics & informatics
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• 제35권3_4호
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• pp.331-347
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• 2017

Soft sets are fantastic mathematical tools to handle imprecise and uncertain information in complicated situations. In this paper, we defined the hybrid structure which is the combination of soft set and complex number representation of intuitionistic fuzzy set. We defined basic set theoretic operations such as complement, union, intersection, restricted union, restricted intersection etc. for this hybrid structure. Moreover, we developed this theory to establish some more set theoretic operations like Disjunctive sum, difference, product, conjugate etc.

• 대한수학교육학회지:학교수학
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• 제9권2호
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• pp.291-312
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• 2007

복소수의 취급이 처음으로 시작되는 제 10-단계 교과서들을 살펴본 결과 그 도입 방법은 모두 이차방정식 $x^2+1=0$을 만족하는 해를 생각하는 과정에서 새로운 수 i를 도입하여 사용하고 있다. 이 방법은 우선 새로운 수 i의 도입이 인위적이기 때문에 학생들이 도입과정에서 혼란스러워하며, 이차방정식을 잘 이해하지 못하는 학생들이 이해하도록 하게 하는 것이 어렵다. 이에 비하여 복소수 도입을 좌표평면 위의 점인 순서쌍과 화살표를 사용하여 도입하면 이차방정식을 이해하지 못한 학생들까지도 흥미를 갖고 학습에 임하게 할 수 있고, 또 수체계를 체계적인 확장으로 다룰 수 있어 학습 효과도 높일 수 있다. 그러나 고등학교 과정에 적합한 지도 내용의 개발이 없어서인지 고등학교에서 순서쌍을 사용한 복소수 도입은 시도되고 있지 않다. 여기서는 수체계의 확장 과정을 초등학교 과정부터 중학교과정을 거쳐 복소수 도입까지 연계되는 체계적이고 가시적인 표현을 통하여 학습할 수 있도록 지도 내용을 개발하였다. 그리고 이 내용으로 지도를 하여본 결과 개발된 학습내용으로 학습지도가 가능함을 알았고, 이 학습이 바람직한 학습임도 알 수 있었다.

• 한국수학사학회지
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• 제25권4호
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• pp.69-82
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• 2012

본 논문은 복소수 지도에 대한 De Morgan의 관점을 분석하였다. De Morgan의 복소수를 도입하고 정당화하는 과정은 그의 대수에 대한 관점이 보편적 산술, 기호 대수, 의미 대수로 발전해가는 과정과 일치한다. De Morgan은 허수의 유용성을 이유로 수학적으로 엄밀하지 않은 허수를 인정하였다. 이를 설명하기 위해 De Morgan은 기호의 의미나 대상은 고려할 필요가 없다는 기호대수를 수용했다. 그러나 그는 허수의 의미를 포기할 수 없었고, 결국 길이와 방향을 가진 직선을 대상으로 하는 이중대수 이론을 전개하였다. De Morgan은 복소수 지도를 정당화하는 과정을 정련해가면서 대수와 수학 전반에 관한 자신의 관점을 지속적으로 발전시켜나갔다고 볼 수 있다. 이는 복소수의 지도가 새로운 수학적 개념의 도입에 머물지 않고 대수에 대한 관점의 변화와 발전을 일으키는 촉매가 될 수 있음을 보여주고 있다.

• 대한기계학회논문집B
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• 제20권9호
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• pp.2953-2964
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• 1996

왕복유동에 의한 순간 열전달현상은, 왕복유동의 두가지 특성인 왕복주파수와 왕복거리를 나타내는 .betha.와 .gamma.에 의하여 결정되고, 그 특성에 따라 세영역으로 나누어짐을 확인하였다. 영역 I에서는 일방향유동에서와 마찬가지로 열유속이 평균온도차에 비례하고, 영역 II에서는 열유속과 평균온도차간에 약 45.deg.의 위상차가 발생하지만 모두 1차 조화성분이 주로 나타났다. 한편 영역 III의 경우에는 위상차가 생길뿐만 아니라 평균온도차에 고차 조화성분이 나타났다. 기존의 방법인 복소 Nusselt수를 고차 조화성분까지 확장하면 열유속을 평균온도차로 나타낼 수 있지만 각 조화성분의 정보를 다 알아야하므로 실제 적용이 불가능하였다.

• Structural Engineering and Mechanics
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• 제87권1호
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• pp.57-68
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• 2023

Response spectrum method is still an effective approach for the design of buildings with supplemental dampers. In practice, complex complete quadratic combination (CCQC) rule is always used in the response spectrum method to consider the effect of non-classical damping. The conventional CCQC rule is based on exact complex mode vectors. Sometimes the calculated complex mode vectors may be not excited by the external loading and errors in the structural responses always arise due to the mode truncation. Load-dependent Ritz (LDR) vectors are associated with the external loading and LDR vectors not excited can be automatically excluded. Also, contributions of higher modes are implicitly contained in the LDR vectors in terms of static responses. To improve the calculation efficiency and accuracy, LDR vectors are introduced in the CCQC rule in the present study. Firstly, the generation procedure of LDR vectors suitable for non-classical damping system is presented. Compared to the conventional LDR vectors, the LDR vectors herein are complex-valued and named as complex LDR (CLDR) vectors. Based on the CLDR vectors, the CCQC rule is then rederived and an improved response spectrum method is developed. Finally, the effectiveness of the proposed method in this paper is verified through three typical non-classical damping buildings. Numerical results show that the CLDR vector is superior to the complex mode with the same number in the calculation. Since the generation of CLDR vectors requires less computational cost and storage space, the method proposed in this paper offers an attractive alternative, especially for structures with a large number of degrees of freedom.

• International Journal of Advanced Culture Technology
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• 제9권4호
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• pp.376-384
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• 2021

This study wants to provide basic data on effective escape safety plans when residents of apartment complex use residential convenience facilities. The findings of the analysis are as follows. First, when this study applied the actual number of users (No=54) of those facilities, the existence of elevator for escape reduced the escape time by 189.0 seconds. Second, when the number of users was calculated on the standard of the number of people who can be accommodated for performance based design (No=316), the existence of the elevator for escape reduced the escape time by 173.5 seconds. Finally, when the number of users was calculated on the standard of installing fire-fighting facilities (No=122), the existence of the elevator for escape reduced the escape time by 159.2 seconds. As a result, it was found that elevator for escape reduces the escape time from fire. Accordingly, it is necessary to revise the construction law to make it obligatory for residential convenience facilities to be equipped with elevator for escape. Currently, apartment buildings lower than 30 stories have either elevator for passengers or elevator for escape. Thus, in future studies, it is necessary to compare escape times in fire depending on the kinds of elevator, and identify the usefulness of elevator for escape.