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최규정,오신성,홍서기 한국방사성폐기물학회 2023 방사성폐기물학회지 Vol.21 No.4
With South Korea increasingly focusing on nuclear energy, the management of spent nuclear fuel has attracted considerable attention in South Korea. This study established a novel procedure for selecting safety-relevant radionuclides for long-term safety assessments of a deep geological repository in South Korea. Statistical evaluations were performed to identify the design basis reference spent nuclear fuels and evaluate the source term for up to one million years. Safety-relevant radionuclides were determined based on the half-life criteria, the projected activities for the design basis reference spent nuclear fuel, and the annual limit of ingestion set by the Nuclear Safety and Security Commission Notification No. 2019-10 without considering their chemical and hydrogeological properties. The proposed process was used to select 56 radionuclides, comprising 27 fission and activation products and 29 actinide nuclides. This study explains first the determination of the design basis reference spent nuclear fuels, followed by a comprehensive discussion on the selection criteria and methodology for safety-relevant radionuclides.
崔圭丁 朝鮮大學校 自然科學硏究所 1982 自然科學硏究 Vol.5 No.-
We have abtained several limit theorem in the theory of probability which are collectively known as the law of large numbers. In this paper, deal with convergence in probability and almost everywhere convrgent.
Experimental Study of the Dynamic Characteristics of Rubber Mounts for Agricultural Tractor Cabin
최규정,오주선,안다빈,박영준,박성운,김흥섭 한국농업기계학회 2018 바이오시스템공학 Vol.43 No.4
Purpose: To obtain the dynamic characteristics (spring stiffness and damping coefficient) of a rubber mount supporting a tractor cabin in order to develop a simulation model of an agricultural tractor. Methods: The KS M 6604 rubber mount test method was used to test the dynamic characteristics of the rubber mount. Of the methods proposed in the standard, the resonance method was used. To perform the test according to the standard, a base excitation test device was constructed and the accelerations were measured. Results: Displacement transmissibility was measured by varying the frequency from 3–30 Hz. The vibration transmissibility at resonance was confirmed, and the dynamic stiffness and damping coefficient of the rubber mount were obtained. The front rubber mount has a spring constant of 1247 N/mm and damping ratio of 3.27 Ns/mm, and the rear rubber mount has a spring constant of 702 N/mm and damping ratio of 1.92 Ns/mm. Conclusions: The parameters in the z-direction were obtained in this study. In future studies, we will develop a more complete tractor simulation model if the parameters for the x- and y-directions can be obtained.
최규정 한국수산학회 1974 한국수산과학회지 Vol.7 No.4
1974年 1月 10日부터 同月 17日에 걸쳐 全羅南道 寶城郡 會泉面 書堂里 앞바다 (得糧灣)에서 2.7ton 級 小型船(機關 DAE DONG 5H)으로 112ha (1,400m×800m)의 漁場에서 피조개 桁綱을 16回 引綱하여 피조개의 現存量을 調査했다. 1. 피조개의 推定 現存量은 約 3.4∼8.3M/T, 個休數로는 約 11,000∼37,000個이다. 2. 漁獲된 피조개는 93%가 3年生 以上의 것이며 主成體를 이루고 있고 殼長(L)과 總重量(W)과의 關係式은 W=0.0002796L^(3.03353)이다.
Optimality Criteria in Experimental Designs
최규정,박병전,양성기,이정화 한국자료분석학회 2005 Journal of the Korean Data Analysis Society Vol.7 No.2
We want to find an optimal design in experimental block designs. In this paper, we have studied the relationship among A-optimality, D-optimality and E-optimality, also -optimality and Criterias of them. Especially we comment the outline of optimality and terminologys in section 1, arrange the reduced normal equation for parameter estimation of model in section 2 and handle the theory of above optimalities by the optimal criterias in section 3. Finally, for readers, we have attached a representative example of A-optimality with simulation tables.