• 분석과 대안
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• 제2권2호
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• pp.1-30
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• 2018

The concept of soft power presents both theoretical and practical difficulties for researchers and policy makers. This essay examines the practical use of soft power and argues that soft power resources in education are important for attracting individuals to migrate between countries and assimilate to the new language and culture of the new location. Japan's attempts to utilize soft power resources in its educational system have provided mixed results dependent on the target population. Japan has successfully attracted individuals into fields related to higher education much more so than skilled labor programs. This essay discusses the importance of educational soft power resources in Japanese strategy to increase educated working population that is assimilated to Japanese language and culture. After reviewing the literature on soft power in Asia, and Japanese cultural integration policies, the essay examines three cases of Japanese educational soft power - the JET Programme, the caregiver-training program, and internationalization of university programs. In addition, the essay shows that Japan is more successful attracting higher educated individuals seeking higher paying employment rather than skilled labor through these programs.

• 한국과학교육학회지
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• 제32권1호
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• pp.46-63
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• 2012

본 연구의 목적은 설명판에 포함된 내용 요소의 종류와 관람객의 집단 유형에 따라 관람객의 설명판에 대한 주목도가 어떻게 달라지는가를 분석하여 주목도에 영향을 주는 요인을 탐색하는 것이다. 이를 위해 국립과천과학관의 테슬라코일을 대상으로 하여 테슬라코일에 대한 관람객의 지적 수요를 기반으로 기본 개념, 현상 설명, 작동 원리, 응용, 역사적 배경 등 5개의 내용 요소를 도출하였으며 각각의 요소에 대한 설명판을 제작하여 자유 관람 상태에서 관람객의 관람 행동을 녹화하여 분석하였다. 연구 참여 집단은 총 586집단으로 학생개인, 성인개인, 학생집단, 성인집단, 가족으로 분류하였으며, 각 집단별로 30.0%, 20.6%, 28.2%, 2.4%, 18.8%의 비율을 나타냈다. 관람객의 설명판에 대한 주목도는 견인력과 유지력으로 나누어 분석하였으며, 견인력은 설명판을 바라본 전체 집단 수에 대하여 3초 이상 주목한 집단 수의 비율로 구하였다. 유지력은 각 설명판에 대한 평균 주목시간과 감쇠 시간으로 구하였다. 역사적 배경과 응용 설명판의 견인력은 각각 72.3% 68.8%로 비교적 높게 나타났으며, 기본 개념 설명의 견인력은 46.6%로 비교적 낮게 나타났다. 평균 주목시간의 경우 현상 설명과 작동 원리 설명판이 각각 37.0초와 34.2초로 높게 나타났으며, 역사적 배경과 응용 설명판은 각각 25.0초와 25.4초로 낮게 나타났다. 각 설명판에 대한 감쇠시간도 평균 주목시간과 유사한 경향으로 나타났다. 즉, 접근하기 쉬운 설명판은 견인력이 높고, 과학적 개념을 심도있게 다루는 설명판은 유지력이 높다고 해석할 수 있다. 성인개인, 가족, 학생집단의 경우 견인력이 각각 66.9%, 66.4%, 62.4%로 높게 나타났으며, 학생개인과 성인개인의 경우 견인력이 55.7%로 나타났다. 평균 주목시간은 학생집단, 가족, 성인집단이 34.0초, 33.0초, 31.6초로 높게 나타났으며, 학생 개인이 19.5초로 낮게 나타났다. 각 집단 유형별 감쇠시간도 평균 주목시간과 유사한 경향으로 나타났다. 즉, 학생집단이나 가족의 경우 견인력과 평균 주목시간이 모두 높게 나타났으며, 학생개인의 경우 견인력과 평균 주목시간이 모두 낮게 나타났다. 잠정적으로 설명판의 견인력은 내용 요소에 의해, 평균 주목시간은 집단 유형에 의해 영향을 좀더 받는다고 할 수 있으며, 추가 연구가 필요하다.

• 수산해양기술연구
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• 제51권2호
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• pp.163-170
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• 2015

Recently LED fish-attracting lamps have been more widely used in fisheries as low-cost and high-efficiency fishing gear, and development of long-life high-efficiency lamps is required through the design of LED packages to optimize heat resistance. This study developed an improved LED fish-attracting lamp with excellent heat performance, which was verified using a numerical model. Heat-resistance design factors such as the heat-radiation fin shape, PCB type, and LED chip count were investigated and optimized. Comparison with a commercial 180-W LED fishing lamp showed that the increase in initial temperature was 40% higher than that of the surrounding LED chip because of design errors in contact thermal resistance. The 250-W LED lamp developed in this study has a characteristic with thermal rising in linearly stable according to the heat source. In addition, luminance efficiency was improved by 20-65% by using flow-visualization simulation. A decrease of 45% in total power consumption with a fuel-cost reduction of over 55% can be expected when using these optimized heat release design factors.

• 한국실내디자인학회논문집
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• 제20권4호
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• pp.174-182
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• 2011

This study analyzed visitors' behaviors in the viewpoint of Attraction Power and Holding Power of exhibits on the basis of exhibition layout of real science museums. Through the analysis, the study grasped efficiency of analysis index and exhibition environment elements which might have an effect on planning the exhibition space of a large-scale museum and producing detailed ranges of exhibition. The main indicators used are: 1. Attraction Power: it indicates the relative incidence of people who have stopped in front of an object/exhibit during the exhibition tour. It is calculated by dividing the number of people who stop by the total number of people who have visited the museum or gallery. 2. Holding Power: it measures the average time spent in front of an information/communication element. It is calculated by dividing the average time of stay by the time "necessary" to read an element. As a result of analyzing the exhibition areas of National Science Museum (Daejeon) and National Museum of Emerging Science and Innovation(Tokyo), the Holding Power was found to be relatively lower than the Attracting Power. This means that 3.5 out of 10 visitors stop in front of the exhibit in 6 exhibition areas, and among these, only 1/10 is used when compared to the user required time of the exhibits. In other words, like the method of deriving an analysis index, the stage of viewing can be categorized as Attracting Power and Holding Power, and because the stage from Attracting Power to the stage of Holding Power are strongly linked, it shows that it is not easy to display a meaningful result. Except, the general distribution of Attracting Power was shown to be high from the entrance area of the exhibition hall based on the standard of viewing sequence. Also, the Holding Power became sequentially lower according to the sequence of exhibition viewing and displayed a meaningful interrelationship with the distribution ratio of island exhibits. In the case of island exhibition method, it is less influenced by the movement flow of visitors when compared to the wall type method of exhibition and can be understood as an exhibition method that provides spatial chances enabling stopping and viewing.

• 한국생산제조학회지
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• 제8권4호
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• pp.123-129
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• 1999

Although type 316 stainless steel is widely used such as in reactors of petrochemical plants and pipes of steam power plants and s attracting attention as potential basic material for the fast breeder reactor structure alloys in nuclear power plants and is attracting attention as potential basic material for the fast breeder reactor structure alloys in nuclear power plants the effect of precipitates which form during the long term exposure at service temperature on creep properties is not known sufficiently. In this study to investigate the creep properties and the influence of prior aging on the microstructure to form precipitates specimens were first solutionized at 113$0^{\circ}C$ for 20 minutes and then aged for different times of 0 hr, 100 hrs, 1000 hrs and 2200 hrs at 75$0^{\circ}C$ After heat treatments tensile tests both at room temperature and $650^{\circ}C$ and constant load creep ruptuere tests were carried out.

• 대한임베디드공학회논문지
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• 제13권3호
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• pp.125-131
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• 2018

STT-RAM is attracting as a next generation Non-volatile memory for replacing cache memory with low leakage energy, high integration and memory access performance similar to SRAM. However, there is problem of write operations as the other Non_volatile memory. Hybrid cache memory using SRAM and STT-RAM is attracting attention as a cache memory structure with lowe power consumption. Despite this, reducing the leakage energy consumption by the STT-RAM is still lacking access to the Dynamic energy. In this paper, we proposed as energy management method such as a way-selection approach for hybrid L2 cache fo SRAM and STT-RAM and memory selection method of write/read operation. According to the simulation results, the proposed hybrid cache memory reduced the average energy consumption by 40% on SPEC CPU 2006, compared with SRAM cache memory.

• 한국정보통신학회논문지
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• 제9권5호
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• pp.1052-1058
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• 2005

본 논문은 저주파 구동형 집어등용 전자식 안정기의 설계 및 제작에 관하여 기술하였다. 제.안한 안정기는 전파 정류회로, 정전력형 전류원으로 동작하는 강압형 컨버터와 130Hz 구형파 발진의 인버터 및 재점등 보호회로로 구성하였다. 램프의 음향공명현상은 130Hz의 저주파 구형 펄스로 제거할 수 있었으며, 램프의 재점등을 위한 고전압 펄스 발생회로를 부가하였다. 실험결과로부터 본 안정기에 의해 구동되는 램프 전압과 전류는 각각 132.5V, 7.6A, 소비전력은 약 1,000 W이었다. 전자식 안정기의 가장 큰 이점으로 중량은 동일 용량의 자기식 안정기에 비해 약 1/5로 감소하였다.

• ETRI Journal
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• 제30권3호
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• pp.451-460
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• 2008

Recently, the power consumption of integrated circuits has been attracting increasing attention. Many techniques have been studied to improve the power efficiency of digital signal processing units such as fast Fourier transform (FFT) processors, which are popularly employed in both traditional research fields, such as satellite communications, and thriving consumer electronics, such as wireless communications. This paper presents solutions based on parallel architectures for high throughput and power efficient FFT cores. Different combinations of hybrid low-power techniques are exploited to reduce power consumption, such as multiplierless units which replace the complex multipliers in FFTs, low-power commutators based on an advanced interconnection, and parallel-pipelined architectures. A number of FFT cores are implemented and evaluated for their power/area performance. The results show that up to 38% and 55% power savings can be achieved by the proposed pipelined FFTs and parallel-pipelined FFTs respectively, compared to the conventional pipelined FFT processor architectures.

• Bulletin of the Korean Chemical Society
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• 제6권2호
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• pp.99-102
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• 1985

Substituent effects of substrate and nucleophile for the reaction of substituted phenacyl tosylates with pyridines were determined conductometrically in acetonitrile. Activation parameters for these reactions were also calculated. The substituent effects in nucleophile were increased with electron-donating power of pyridines and Br${\o}$nsted linear relationship was shown. Rate constant was increased by both electron-donating and electron-attracting groups in the substrate. It seems that dissociative S$_{N}$2 ("loose" transition state) mechanism is operating in the case of electron-donating substituents while associative S$_{N}$2 ("tight" transition state) mechanism is operative in the case of electron-attracting substituents.

• International Journal of Control, Automation, and Systems
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• 제3권spc2호
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• pp.355-362
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• 2005

Deregulations and market practices in power industry have brought great challenges to the system planning area. In particular, they introduce a variety of uncertainties to system planning. New techniques are required to cope with such uncertainties. As a promising approach, probabilistic methods are attracting more and more attentions by system planners. In small signal stability analysis, generation control parameters play an important role in determining the stability margin. The objective of this paper is to investigate power system state matrix sensitivity characteristics with respect to system parameter uncertainties with analytical and numerical approaches and to identify those parameters have great impact on system eigenvalues, therefore, the system stability properties. Those identified parameter variations need to be investigated with priority. The results can be used to help Regional Transmission Organizations (RTOs) and Independent System Operators (ISOs) perform planning studies under the open access environment.