• 설비공학논문집
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• 제17권4호
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• pp.341-346
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• 2005

The simplification of solar thermal systems reduces the possibility of operating trouble and lowers the cost of the initial investment and maintenance. This also leads to increased competitiveness in the energy market. We proposed a spiral-jacketed storage tank that functions both as a heat exchanger and expansion tank, which removes the secondary piping and markedly simplifies the entire system. The new storage tank was designed and manufactured to maintain the same performance as the conventional system and the exiting system was remodelled by adopting the newly proposed storage tank. This experiment was conducted under real conditions over a period of several months. The retrofitted system with the spiral-jacketed storage tank showed good performance that is on a similar level as the previous system having a typical storage tank and heat exchanger.

• 한국농공학회논문집
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• 제49권1호
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• pp.35-42
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• 2007

This paper develops a Sustainable Regional Economic Growth Model (SREG) which estimates the relation of labor population change and employment increase in each occupation and maximum limits and minimum requirements of employment increase by labor population change in a specified region using multiplier theory. To develop the proposed model, sustainable regional economic growth is defined as a steady increase of labor population over a long term period and the limit of employment increase is defined as the estimated labor population change in the region with no need for commutation from the surrounded areas. Developed model was applied to 67 county in Pennsylvania State and the results revealed that the investment in infrastructure occupations, such as transportation, warehousing, utilities, information, communication, and other public utilities, maximizes the effects for increasing employment, whereas finance, insurance, and real estate occupations have minimum effects for increasing employment. Calculated minimum requirements of occupations show that infra-structure occupations is a critical factor for labor population change and maximum limits of occupations show that agriculture and finance occupations are difficult to increase independently.

• 한국지능시스템학회논문지
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• 제22권2호
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• pp.261-266
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• 2012

동북아시아 경제의 급성장으로 인한 지역 물동량 및 해운시장 환경 변화에 따라서 부산항과 상해항은 동북아 물류 중심 허브가 되기 위하여 항만개발 및 항만 경쟁력을 강화해 왔으며, 최근에는 환적 컨테이너 화물 유치경쟁이 더욱 심화되고 있다. 따라서 본 연구에서는 동북아 주요 컨테이너 항만중 경쟁관계에 있는 부산항과 상해항을 대상으로 이 두 항만이 피더항의 환적화물을 유치하기 위한 경쟁의 게임모형을 수립하여 경쟁상황을 분석하였다.

• 안보군사학연구
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• 통권2호
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• pp.23-89
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• 2004

The protective area of military installations can be a essential investment goods for producting public goods like military installations and national security. For the purpose of this, The protective area of military installations are set up and applicated at important strategic areas. It causes colplications and frictions among the people, government and army inevitably to set up the protective area of military installations, as the relation between the army which produces security or public goods and the people that make and use valuable goods is opposed and contradictory to each other. Heretofore, the civil petition of the protective affair to military installations has been presented individually. As local self- government is fixed, a local selg-governing body presents many civil petitions now. Therefore the protective affair to military installations came to be examined carefully in the aspecs of improving the relationship between the civil and army, raising natinal competitiveness, and increasing efficiency of military operations. Though the relationship between the civil and army is opposed and contradictory, it is required to be in keeping with each other with a situation around society, that is, changes and trend of national security, politics, economy, society. Accordingly, if you drive plans of rational management to the protective area of military installations, you can not only achieve successful military installations, but also be a great help to growth of a local community. Then 「The Army with the people」worthy of the name can be real.

• 한국초전도저온공학회:학술대회논문집
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• 한국초전도저온공학회 2003년도 추계학술대회 논문집
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• pp.49-52
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• 2003

As the power demand has increased, it is expected that the transmission system will have more complicated problems under the influence of investment reduction for overall power system. The route length per MW demand will be reduced gradually from 0.6［C-km/㎿］ to 0.53 ［C-km/㎿］ in 2010. This comes up to a real serious problem of system planning and operation viewpoints HTS power technologies have properties to solve these complex transmission and distribution constraints, especially for metropolitan area, in the future. As the HTS technology has developed, the HTS cable technology can be the most effective alternative to solve the future expected transmission constraints as compared with other countermeasures in terms of economics, environments and system operation. This paper describes the general application methodology of developing 22.9 ㎸ HTS cable by CAST for practical distribution system, particularly, step-by-step application methodology of 22.9 ㎸ HTS cable to substitute the existing and planning 154 ㎸ cable. In this scheme, almost of the downtown 154 ㎸ substation of metropolitan city such as Seoul will be changed into 22,9 ㎸ switching station.

• 한국건축시공학회지
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• 제9권2호
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• pp.69-76
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• 2009

Recently, the twenty-first century is called "the age of localization and regionalization" in Korea. So, local government should need to keep balance between the existing administrative management and new management strategies based on CEO's mind in order to deal with the situation of such that(the age of localization and regionalization) and improve efficiency of public service. In addition, they build public buildings after that they should operate and maintain them regularly. However, Korea local governments have tried to run many projects to expand insufficient local finance that was only for profit oriented public projects without considering management. Therefore, this paper is a basic study to establish and suggest the reasonable operation plan for local government by examining and reviewing actual operation condition in the public buildings. With the evaluation method which is demanded from public construction management to introduce a civil management technique manages an investment mind standard and management basis of assessment, proposes 8 sides of financial affairs, real estate maintenance and facility management, achievement evaluation, environmental safe crisis management, judiciary and explanation responsibility with base.

• 한국병원경영학회지
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• 제14권3호
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• pp.49-66
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• 2009

Purpose : This study was aimed at examining the relationships of university students' self-efficacy to creative disposition and creative thinking ability. Method : A descriptive study was conducted with a sample of 320 students enrolled 4-year-undergraduate academic programs major in nursing as well as elderly care management in one University located in Pusan, Korea. This study used: (a) 24 items of Self-Efficacy Scale originally developed by Kim & Cha(1996), and (b) 39 items of creative thinking ability and 16 items of creative attitudes in a Self-Report Form of Integrative Creativity Scale developed by Bak & Kang(2006). The data were analyzed by using Pearson correlation and hierarchical multiple regression methods. Result : University students' self-efficacy has significantly positive impact on creative thinking ability(p<.001) with 26.4% of the variance and creative disposition(p<.001) with 48.9%. Creative thinking ability as well as the disposition related to creativity that university students possessed were significantly influenced by efficacy on self-control and efficacy on taking difficult tasks. Conclusion : This result supports Social Cognitive Theory and Investment Theory of Creativity in terms that self-efficacy is the factor affecting fostering creative ability and demonstration of creativity potential to the real. This also implies that healthcare educational programs reinforcing students' self-efficacy would contribute to breed them to healthcare professionals with creative competency.

• 한국재난정보학회 논문집
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• 제5권1호
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• pp.10-27
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• 2009

The fear briefly became reality in the U.S. after 9/11, as man-made anthrax spores were found in letters and in east coast post offices on a number of occasions. Anthrax attacks must be related to the terrorist attacks of September 11. These two accidents changed the situation completely. Characteristics are summarized as belows. First, it is necessary for all countries to create each own appropriate countermeasures against bioterrorism. In addition, it is urgent to consider countermeasures focusing on bioterror characteristics that terrorists may use biological agents because they can be extremely difficult to detect and do not cause illness for several hours to several days. Otherwise, those attacks will also show the panic and very real danger posed by the release of such toxins on an unsuspecting public. Second, it is crucial to manage the result thoroughly. A biological weapon is useful to a terrorist group mainly as a method of creating mass panic and disruption to a society. Because it is not easy to predict and collect information about how terrorists utilize pathogenic microbe as well as terror measures in their activities, more realistic approach should be taken to reduce damage. Third, to expand investment in research and development is necessary. Considering advances in microbiology and genetic engineering lately, it is likely that new pathogenic microbe would be created by the enemy. For that matter, it is imperative that medical countermeasures should be devised.

• 전기학회논문지
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• 제66권12호
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• pp.1792-1798
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• 2017

Event Data Recorder(Car Black-Box) with WiFi dongle have been released, and the platform of the majority is the Linux platform. This is because the platform development is possible in little investment cost by reducing the source licensing costs by taking advantage of the open source. But utilizing Linux platform has the limitations of boot-up time and consuming processing power due to the limitation of battery capacity, to be cost-competitive to minimize the use of memory. In this paper, the real-time operating system(RTOS) is utilized to optimize these portions. MP4 encoder and Muxer are developed to be about ten seconds boot up and minimized memory. It has the advantages of operating at lower power consumption than the Linux utilizing WiFi dongle. Utilizing a WiFi dongle is to provide a progressive download feature on smart phones to lower product prices. But RTOS has the weakness in WiFi. Porting TCP /IP, Web and DHCP server and combination with the USB OTG Host interface by implementing the protocol stack are developed for WiFi. And also SPI NOR flash memory is utilized for faster boot time and cost reductions, low processing power to be consume. As the results, the developed proved the 10 seconds booting time, 24 frame rate/sec. and 10% lower power consumption.

• 한국산학기술학회논문지
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• 제12권7호
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• pp.3016-3021
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• 2011

국가 신성장사업의 투자계획은 알려져 있으나 그 수익성에 대한 분석 및 예측은 찾기 어렵다. 본 고에서는 불확실성이 큰 신기술사업의 가치평가시 사업주체의 의사결정의 유연성에 기인하는 가치를 감안할 수 있는 컴파운드 옵션 모델에 의해 그 가치평가를 수행하고자 한다. 10개의 후보사업군 중 태양전지, 자동차용 전지, 그리고 바이오제약을 그 대상으로 하여 비교 연구를 수행한다. 또한, 실물옵션 가치평가 이론을 검토하고 그 적용의 한계에 대해서도 서술하였다.