• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.412-413
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• 2008

가공배전선로는 야외에 시설되어 하계의 태풍 및 동계의 설해와 같은 자연재해에 상시 노출됨에 따라 지지물 절손 피해가 발생할 우려가 높다. 따라서 직선으로 시설되는 전주가 절손되지 않도록 설계지역의 기상조건을 감안하여 전주강도가 충분한지 여부를 검토하여야 한다. 그러나 현업에 종사하는 설계원들이 어떠한 방법으로 전주강도를 검토하는지에 대한 이해가 부족한 실정이다. 따라서 본 고에서는 전주강도 계산과 관련하여 연구된 이론을 설명하였고, 그 이론을 바탕으로 장경간개소와 표준경간에 설치되는 전주에 대한 설계방안을 연구한 결과를 사례를 통해서 설명하였다. 본 고에서 제시한 방법에 따라 설계를 시행한다면 직선으로 시공되는 전주들의 강도가 태풍 및 설해에 대비하여 충분히 확보됨에 따라 재해 시에도 이로 인한 전주 절손 피해가 예방될 수 있을 것으로 기대되며, 또한 전기고장 예방을 통한 고품질 전력확보에도 기여할 것으로 기대된다.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.948-954
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• 2008

In this study, vibrational characteristics of two nano-imprinting stages is analyzed and compared with respect to the methodology to support the upper-plate of the stage. The first type of the stage has three supporters at each corners of the stage and one thrust bearing at the center of the stage. The other type of the stage has four supporter in each corner of the stage without a thrust bearing. The FEM software with flexible modeling is used for the normal mode analysis. The result depicts the difference of vibrational characteristics caused by the difference of support methods. The design criteria for the precision nano-imprinting stage is also discussed.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.12 no.1
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• pp.15-21
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• 2013

The safety and stability of 5MW class offshore wind turbine Jack-up platform was investigated through ocean basin experiment. For simulating the environmental condition of yellow sea in the South Korea, diverse waves, winds and currents were performed based on Froude's number. Regular wave and irregular wave based on Froude's number were applied to the wind turbine structure. In experiments, the height and period of regular wave type were scaled down as the 1:50 ratio of real wave condition. Irregular wave type was simulated with TMA(Texel Storm, Marsen and Arsloe)spectrum. The vertical reaction force, resonance period and wave pressure applied to multi-supporters of wind offshore structure were measured experimentally. Finally, the results showed that the capsizing situation of the offshore structure was generated by the severe environmental condition.

• Transactions of the Korean Society of Mechanical Engineers
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• v.17 no.10
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• pp.2646-2653
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• 1993

A rotational torque calibration system is developed to measure rotational torque of power generating systems and to calibrate non-contact rotational torque measurement systems. The maximum capacity of the developed system is 4.5 N-m. It is composed of a DC motor, a DC generator, a control system, a master torque cell, a slip ling/brush set, supporters, a bed etc. The control system is characterized by the closed-loop control with differential intergrator. Rotational torque measurement test and unit response test are conducted to estimate the accuracy of the developed system. It is found that system maintain high consistency and accuracy with the maximum error of 0.25%, Therefore the developed system can be used to measure the rotational torque of power generating systems and to calibrate non-contact rotational torque measurement systems.

• Journal of Korean Institute of Industrial Engineers
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• v.22 no.3
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• pp.427-440
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• 1996

Constraint networks are a major approach to knowledge representation in Concurrent Engineering (CE) systems. The networks model various factors in CE as constraints linked by shared variables. Many systems have been developed to assist constraint network processing. While these systems can be useful, their underlying assumption that a solution must simultaneously satisfy all the constraints is often unrealistic and hard to achieve. Proposed in this paper is a hierarchical representation of constraint networks using priorities, namely Prioritized Constraint Network (PCN). A mechanism to propagate priorities is developed, and a new satisfiability definition taking into account the priorities is described. Strength of constraint supporters can be derived from the propagated priorities. Several properties useful for investigating PCN's and finding effective solving strategies ore developed.

• Journal of Family Resource Management and Policy Review
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• v.9 no.2
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• pp.93-110
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• 2005

Improving the quality and level of the research of institutional household management is one of major issues in the field of study on family resource management and human ecology In this context the purposes of this study were to develop the scheme for the theoretical reconstruction of the subsystem in the institutional household management and to present the applicational contents focused on the marketing management. This study reached a conclusion that the marketing management has to include more practical contents such as PR(public relations), the development and management of supporters and volunteers in order to enhance the useful community resources.

• Journal of the Korean Society for Library and Information Science
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• v.13
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• pp.73-94
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• 1986

The purpose of this article is to take a look into the past twenty years and to evaluate the changes in the organization of the library and the information function during this time period. Academic and special libraries are the ones that have made an impressive progress and innovations to keep pace with a changing environment. New technologies and ideas have brought strong supporters of offering various specialized information services to the library users. The different approaches and experiments to better perform this professional role in the library and in turn, the efforts in the educational institutions to meet the challenges were reviewed through the literature. Much of the literature available regarding the reference and information function deals mainly with the trends in the u. s. libraries. The implications of these trends to Korean libraries and library education are sought in view of our social, economic, and educational circumstances as well as our user behavior.

• Proceedings of the KIEE Conference
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• 2006.07e
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• pp.9-10
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• 2006

가공배전선로는 태풍 내습시 전주 및 전선에 작용하는 풍압에 대하여 견딜 수 있도록 설계되어져야 한다. 따라서 본 연구에서는 가공배전선로의 설계시 사용되는 전주에 가해지는 풍압에 의한 굽힘모멘트 및 굴곡개소의 합성모멘트 계산시 사용하는 기존 계산식의 문제점을 분석하고 현장에서 쉽게 적용 가능한 새로운 계산식을 유도하였다. 새로운 계산식을 이용하여 설계자들이 가공배전선로의 지지물 및 지선강도를 검토할 수 있게 됨으로써 태풍과 같은 재해시에도 안전한 설비를 시설할 수 있게 되었다.

• International Journal of Contents
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• v.17 no.4
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• pp.52-61
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• 2021

The 2020 US Presidential Election was a highly-anticipated moment for our global society. During the election period, the most intriguing issue was who would be the winner-Trump or Biden? Among the possible main themes of the 2020 election, from the COVID-19 pandemic to racism, this study focused on feminism ('women') as a main component of Biden's victory. To explore the character of Biden's supporters, this paper focused on internet spaces as a source of public opinion. To guide the data analysis, this study employed four indices from empirical studies on Big Data analytics: issue salience, attention diversity, emotional mentioning, and semantic cohesion. The main finding of this study was that the representative keyword 'women' appeared more prevalently within content related to Biden than Trump, and the keyword pairs indicated that female voters were the main reason for Trump's failure but the root cause of Biden's victory. The results of this study indicated the role of the internet as a forum for public opinion and a fountain of political knowledge, which requires more rigorous investigation by researchers.

• Asian Journal for Public Opinion Research
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• v.9 no.2
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• pp.85-106
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• 2021

What is the basis of the political polarization in Thailand? What are the key differences between the opposing camps? This paper aims to answer these questions at the individual level, using a national survey conducted by the authors between July and August 2017. The paper argues that the color-based polarizations in Thailand are significant and deeply rooted in a complicated array of demographic, attitudinal, and political dimensions. That is, despite their relative differences in demographics and socioeconomic status, the Yellow Shirt and Red Shirt supporters differ in party identification and democratic values. This finding indicates that the struggle between the conflicting groups in this country is not just about competing interests, but about the identities and basic values underlying the "rules of the political game."