• 대한수학회보
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• 제54권3호
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• pp.917-933
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• 2017

In this paper, seven equivalent conditions of complete moment convergence and complete integral convergence for negatively orthant dependent (NOD, in short) sequences are shown under two cases: identical distribution and stochastic domination. The results obtained in the paper improve and generalize the corresponding ones of Liang et al. [10]). In addition, an extension of the Baum-Katz complete convergence theorem: six equivalent conditions of complete convergence is established.

• Journal of the Korean Statistical Society
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• 제33권4호
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• pp.353-365
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• 2004

In this paper, we define the weighted U-empirical process for simple linear model and show the weak convergence to a Gaussian process under some conditions. Then we illustrate the usage of our result with examples. In the appendix, we derive the variance of the weighted U-empirical distribution function.

• 한국산업융합학회 논문집
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• 제24권3호
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• pp.307-313
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• 2021

In this study, the comparative analysis, among the design standard value of distribution power, the calculated value from the measurement data of strand and the empirical data of the distribution line itself, have been performed for the elastic coefficients and linear expansion coefficients of distribution line conductors. The empirical values of elastic coefficients were lower about 10.6%(892kgf/mm²) than those of the design standard value of the distribution power and there were a little difference between the empirical values of linear expansion coefficients and the design standard value of the distribution power. From the above results, it could be concluded that the empirical values of conductor characteristics should be used in the dip design and installation of distribution line.

• 산경연구논집
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• 제9권4호
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• pp.37-42
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• 2018

Purpose - The purpose of this study is to analyze the current status of various fusion research journals and the operational strategies of such journals and compare them with the operational strategies of IJIDB. Research design, data, and methodology - This study focused on the contents analysis of convergence journals after summarizing the development history from IJIDB's past and its external situation. In addition, we analyzed other strategies such as the number of publication journals, the number of publications, the academic scope, and the impact factor that other convergence journals operate on. Results - As a result of the analysis, the convergent journals showed to have several related journals, and some journals managed their impact factor well at 5.8. Also, some journals loaded 25 papers in one volume. Also, the managerial functions in IJIDB should be developed further to increase its stability. Finally, opportunities for articles by Candidates of Ph.D. and Masters degree students should be more open to in this field. Conclusions - If IJIDB finds its competitiveness in comparison with the operational strategies of other convergence journals, it will be the best journal in the Korea Citation Index to receive the most research papers and hospitality from scholars in the Korean journals.

• Journal of the Korean Physical Society
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• 제73권10호
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• pp.1577-1583
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• 2018

Tumor-treating fields therapy involves placing pads onto the patient's skin to create a low- intensity (1 - 3 V/cm), intermediate frequency (100 - 300 kHz), alternating electric field to treat cancerous tumors. This new treatment modality has been approved by the Food and Drug Administration in the USA to treat patients with both newly diagnosed and recurrent glioblastoma. To deliver the prescribed electric field intensity to the tumor while minimizing exposure of organs at risk, we developed an optimization method for the electric field distribution in the body and compared the electric field distribution in the body before and after application of this optimization algorithm. To determine the electric field distribution in the body before optimization, we applied the same electric potential to all pairs of electric pads located on opposite sides of models. We subsequently adjusted the intensity of the electric field to each pair of pads to optimize the electric field distribution in the body, resulting in the prescribed electric field intensity to the tumor while minimizing electric fields at organs at risk. A comparison of the electric field distribution within the body before and after optimization showed that application of the optimization algorithm delivered a therapeutically effective electric field to the tumor while minimizing the average and the maximum field strength applied to organs at risk. Use of this optimization algorithm when planning tumor-treating fields therapy should maintain or increase the intensity of the electric field applied to the tumor while minimizing the intensity of the electric field applied to organs at risk. This would enhance the effectiveness of tumor-treating fields therapy while reducing dangerous side effects.

• 조명전기설비학회논문지
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• 제28권8호
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• pp.24-31
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• 2014

This paper dealt with the LED optical illumination system design for the Masthead navigation light to replace halogen lamps. We made Fresnel lens satisfy luminous intensity distribution of "Convention on the International Regulation for Preventing Collisions at Sea(COLREG)". The optical system is designed by classifying three parts: light source, lens, and cut off plate. The source of light has been made to have the uniform horizontal and vertical light distribution by placing 6 LEDs at intervals of $54^{\circ}$, and as the cylindrical Fresnel lens, the lens has been designed to achieve the uniform horizontal and vertical light distribution in the range of plain light. Finally, the cover has been designed to block the light from the outside of plain light and ultimately met the standards for light distribution of navigation lights. In addition, the validity of design has been verified with manufacturing a trial product.

• 한국농공학회논문집
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• 제64권2호
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• pp.1-13
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• 2022

Agrivoltaic facility is the composite system that the solar panel is installed above the farmland, and it enables crop and electricity production simultaneously. Solar panels of the agrivoltaic facilities can block and reduce the amount of solar irradiance arriving at the farmland, but it can help the crop growth by preventing excessive solar irradiance. Therefore, to clarify how the agrivoltaic facilities affect the crop growth, precise solar irradiance distribution under the solar panel should be modeled. In this study, PAR (photosynthetically active radiation), radiation from 400 to 700 nm, which crops usually use to grow, was extracted from the total irradiance and its distribution model under various conditions was developed. Monthly irradiance distributions varied because the elevation of the sun was changed over time, which made the position changed that the local maximum and minimum irradiance appear. The higher panel height did not cause any significant difference in the amount of irradiance reaching below the solar panel, but its distribution became more uniform. Furthermore, the panel angles with the most irradiance arriving below the solar panel were different by month, but its difference was up to 2%p between the irradiance with 30° angle which is usually recommended in Korea. Finally, the interval between panels was adjusted; when the ratio of the length of the panel to the empty space was 1:2, the irradiance of 0.719 times was reached compared to when there was no panel, 0.579 times for 1:1 and 0.442 times for 2:1.

• 한국비블리아학회지
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• 제15권2호
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• pp.49-70
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• 2004

본 연구는 출판미디어의 메타 데이터적 개발과 보급동향을 파악하기 위하여, 종이책과 전자출판물로 나누어서 현황을 지표위주로 분석하였다. 더불어, 현황분석에서 도출되는 문제점을 통해 출판미디어의 데이터 개발과 보급에 어떠한 전망적 시각을 부여할 것인지를 논의한 연구이다. 기존의 종이책과 새로운 전자출판물은 인터넷으로 표방되는 디지털 미디어 시대에 새로운 융합 미디어로 그 범위를 넓혀가고 있다. 수용의 유비쿼터스 실현을 위한 융합미디어로의 변화는 기존의 종이책이 갖는 형질을 물려받는 유전의 속성을 기저로 진화한다는 논거를 통해, 종이책과 전자출판물 그리고 융합미디어로서의 디지털 출판물의 양적 확장의 전망을, 보급에 앞서 해결해야 할 솔루션 문제와 함께 논의하고 있다.

• 한국정보컨버전스학회논문지
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• 제6권2호
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• pp.89-96
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• 2013

본 연구는 도매안경테의 종사자를 중심으로 안경테 유통을 분석하여 유통의 개선점을 연구하였다. 다양한 연령층과 학력으로 유통업계에서 근무를 하고 있으며, 회사의 규모는 영세하였다. 안경테의 재고 관리를 위해서는 체계적인 관리가 이루어지지 않았고, 보다 나은 유통 시스템에 대한 기대도 크지 않았다. 안경소비자와 안경제조업체의 중간적인 역할에 있는 도매안경테 회사는 보다 나은 판매 확보를 위해 공동 판매장이나 internet판매의 활성화를 확보하여야 할 것으로 본다.

• 한국정보컨버전스학회논문지
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• 제5권2호
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• pp.25-35
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• 2012

현대 유통산업에서 기업들은 많은 전략을 구사하고 있다. 유통구조의 개선은 기업의 중대한 과제인 동시에 국가적으로도 그 비중이 너무나 크다. 국내 유통시장의 변화는 기업의 마케팅 정책 수립에 중대한 영향을 가져온다. 라이프스타일과 소비트렌드의 다양성도 유통환경에 많은 변화를 가져왔으며 그 대응전략도 다양하다. 따라서 본 연구는 급변하는 유통분야 발전에 기초 자료가 되고 향후 연구에 출발점이 되고자 한다.