• 시스템엔지니어링학술지
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• 제9권1호
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• pp.47-53
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• 2013

The object of this study is to define systematically for outputs of Verification Process among the system life cycle process based on ISO/IEC 15288 for power supply system, which is one of the importance sub-systems to configure the LRT system. Furthermore, to prevent various problem in advance that can occur in the Transition LRT's power supply to be completed Integration. For this purpose, traceability of verification requirement and outputs. should be managed to use verification for system requirement and data processing tool. by system engineering techniques of system life cycle process based on ISO/IEC 15288 to LRT system.

• 농촌지도와개발
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• 제25권3호
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• pp.149-160
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• 2018

This study aimed to analyze the replacement investment of the diesel fuel system with the pallet fuel system in the Korean farming sector. Equivalent annual annuity approach was used to resolve a discrepancy of useful life in capital goods and to facilitate investment analyses in an independent perspective. Data was obtained from previous studies on economic analysis of greenhouse tomato, paprika and cucumber. Results showed that the replacement with the pallet fuel system was acceptable irrespective of the remaining period of useful life for the diesel fuel system. In addition, sensitivity analysis with government support level, repair cost, and light and heat energy cost show ed robustness in the possibility of replacement with the pallet fuel system while the speed of replacement was accelerated with an increase in the amount of diesel fuel used and price of diesel fuel, and a decrease in price of the pallet fuel. The result implied that the replacement investment rather than a new investment was appropriate for existing greenhouse farmers and the pallet fuel system was acceptable to replace existing diesel fuel system in producing greenhouse tomato, paprika and cucumber.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권1호
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• pp.1-15
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• 2023

The aim of this study is to identify intelligent learning support functions in Learning Management System (LMS) to support university student learning activities during the transition from face-to-face classes to online learning. To accomplish this, we investigated the perceptions of students on the levels of importance and urgency toward learning support functions of LMS powered with Artificial Intelligent (AI) technology and analyzed the differences in perception according to student characteristics. As a result of this study, the function that students considered to be the most important and felt an urgent need to adopt was to give automated grading and feedback for their writing assignments. The functions with the next highest score in importance and urgency were related to receiving customized feedback and help on task performance processed as well as results in the learning progress. In addition, students view a function to receive customized feedback according to their own learning plan and progress and to receive suggestions for improvement by diagnosing their strengths and weaknesses to be both vitally important and urgently needed. On the other hand, the learning support function of LMS, which was ranked as low importance and urgency, was a function that analyzed the interaction between professors and students and between fellow students. It is expected that the results of this student needs analysis will be helpful in deriving the contents of learning support functions that should be developed as well as providing basic information for prioritizing when applying AI technology to implement learner-centered LMS in the future.

• 가정과삶의질연구
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• 제26권5호
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• pp.15-25
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• 2008

By population graying, elderly residing problem is risen by social problem. Specially, because residing is occupying many parts in psychological sentimentalize stability of elderly senescence, it is misgovernment that suitable countermeasure is pressing hereupon with governmental interest so that elderly age may can inhabit to suitable residing space. The purposes of this research used content analysis method about elderly residing support policy laying stress on data of elderly residing support policy connection literature, virtue research etc.. and research result is as following ; First, as elderly residing connection equipment is permitted by common people subject operation in government burden gradually in van abroad including our country, supply of elderly equipment is spreading. Second, support about elderly dependent is introducing house priority supply system to financial favors benefit and income tax exemption, aged parents supporter being increasing. Third, through reconstruction and so on of house, real elderly's ashes are developing by support policy. Also, is administering elderly residing support policy by total service that can support elderly aging in place.

• 한국국방경영분석학회지
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• 제30권2호
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• pp.13-31
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• 2004

This paper aims at efficient determining the economic life of weapon systems. Specifically, the procedure to estimate the life cycle cost at initial acquisition state or at development state using the PRICE model is proposed. The PRICE model is a parametric cost estimation which is widely used in the field of national defense. The model includes the estimation of the cost in life cycle of weapon systems such as research and development, acquisition, operation and support. Using this model, economic life of weapon systems can be determined. Based on an equivalent annual cost (EAC) method which sums the capital recovery with return (CR) and the equivalence cost (EC), the economic life will be calculated. A case study is accomplished to illustrate the proposed procedure.

• Journal of Information Technology Applications and Management
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• 제20권1호
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• pp.43-51
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• 2013

Human being does work to live out and they have their private life because human has sociality. Both work and life are important to live out but they are on the trade-off relationship. Because keeping the balance between work and life is too hard, it has been interested by academic and practical areas. Definition of Work-life balance here is that balance or imbalance arising between work and life has no negative impact on their daily life. Above all, Work-life balance is important because it is strongly related to identity. Recently, the introduction of the mobile office system has emerged as a way to solve the problem of work-life balance. It is based on the teleworking which was formerly generated. Teleworking is to perform the work in the employee's home or office space set aside without going into the workplace. Concept of the mobile office system here is not only using portable devices during work for convenience but also the system which is designed for the performance. Thanks to the diffusion of smart devices(smart phone, tablet pc), mobile office system has been spread. Although the importance of mobile office systems is emerging, there are few researches about it. Even they mostly focus on the standpoint of performance of mobile office system. However, Quality of life is as important as the performance. As a part of Quality of Life field, Work-life balance is the closest to employee's quality of life. So this study aims to examine the effect of the use of mobile office systems on work-life balance. To do so, we try to find factors effecting Work-life balance from existing studies and then set a research model. We set the use of mobile office systems as independent variables which are divided by use of function, use by location and use by situation. There are four dependent variables - sense of self command, sense of balance, solving work problem, solving life problem. We collected data from employees who are using mobile office systems on their job. 215 people were participated in the survey and we used multiple regression analysis to verify our research model. Results show that every independent variable has no impact on solving work problem while they have slight impact on the other dependent variables. Especially use on the business trip has significant effect on dependent variables. It means that there is a possibility use of mobile office system could control the employee's quality of life and system should be evolved until it covers even critical tasks. Also, support for mobile office system -education, encouragement-should be provided. By mobile office system is maturing, future research would be done.

• 정신신체의학
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• 제10권1호
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• pp.27-36
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• 2002

연구목적: 뇌졸중은 개인의 삶의 질에 부정적인 영향을 미치는 만성 질환이다. 그러나 뇌졸중에 대한 대부분의 연구 및 치료, 그리고 재활은 주로 신체적 측면에 집중되었고, 정선과적 측면과 삶의 질에 대한 고려는 많은 부분이 무시되어 왔다. 따라서 본 연구에서는 신체적 영역, 심리적 영역, 사회적 관계 영역, 그리고 환경 영역을 평가하는 WHO 삶의 질 척도를 사용해 뇌졸중 환자들의 삶의 질을 정상인과 비교하고 뇌졸중 환자의 여러 임상 양상과 삶의 질과의 관련성을 알아보고자 한다. 방법: 98명의 급성기 뇌졸중 환자들과 24명의 정상인을 대상으로 세계보건기구 삶의 질 간편형 척도를 사용하여 각 영역과 총점의 평균을 비교하였다. 그리고 뇌졸중 환자군에서 나이, 성별, 교육수준, 우울 및 불안 증상의 정도, 신체적 장애의 정도 등과 삶의 질과의 상관성을 분석하였다. 또한 이들 요인이 삶의 질에 미치는 영향을 다중회귀분석으로 평가하였다. 결과: 뇌졸중 환자군에서 정상군에 비해 전체 삶의 질 및 각 하위 영역 모두 낮은 삶의 질 수준을 보였다 우울 및 불안 증상, 사회적 지지체계의 정도는 전체 삶의 질 및 대부분의 하위 영역과 유의한 상관성을 보였다. 또한 뇌졸중 환자들 중 남자의 경우 여자에 비해 높은 삶의 칠 수준을 보였다. 그러나 Barthel's index로 평가한 신체적 장애의 정도는 삶의 질 수준과 유의한 상관성이 없었다. 다중회귀분석 결과 우울 및 불안 증상의 정도, 사회적 지지체계의 정도, 그리고 성별이 뇌졸중 환자의 삶의 질에 영향을 미치는 요인으로 추출 되었다. 결론: 뇌졸중 환자의 삶의 질은 정상군에 비해 저하되어 있었다. 또한 우울 및 불안 증상의 정도, 사회적 지지 체계의 정도, 그리고 성별이 뇌졸중 환자의 삶의 질에 영향을 미치는 요인이었다.

• 한국산학기술학회논문지
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• 제19권12호
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• pp.90-98
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• 2018

최근 무기 체계에 대한 성능 요구 사양이 강화됨에 따라 연구 개발 초기 단계에서부터 개발 기간 단축 및 비용 최소화와 함께 효율적인 연구 방안 모색이 요구되고 있다. 이의 일환으로 무기 체계 개발 단계에서 가상현실 기술을 활용하여 군수지원 분석과 설계 검증을 수행할 수 있다. 또한 실질적 협업 체계 구축의 일환으로 종합 군수지원(ILS, Integrated Logistics Support) 개발 분야에서는 군수 지원성 향상을 목적으로 한 가상현실 기술의 적용이 대두되고 있다. 이에 본 연구에서는 무기 체계 전 수명주기 동안 가상현실 기술을 적용한 ILS 개발 및 적용 방안을 제안하고자 한다. 또한 현재 개발 중인 무기 체계에서 이를 수행하기 위해 개발한 가상현실 도구인 디지털 정비절차 검증장치(DMS, Digital Maintenance System)의 주요 기능 및 ILS 개발 단계별 적용 방안을 소개하고, DMS의 효율적인 ILS 적용을 위한 향후 발전 과제에 대해서도 제시하고자 한다.

• Smart Structures and Systems
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• 제16권4호
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• pp.743-758
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• 2015

This paper presents an advanced life cycle cost (LCC) analysis of a ground source heat pump (GSHP) system and suggests a smart operation mode with a thermal performance test (TPT) and an energy pile system constructed on the site of the Incheon International Airport (IIA). First, an economic analysis of the GSHP system was conducted for the second passenger terminal of the IIA considering actual influencing factors such as government support and the residual value of the equipment. The analysis results showed that the economic efficiency of the GSHP system could be increased owing to several influential factors. Second, a multiple regression analysis was conducted using different independent variables in order to analyze the influence indices with regard to the LCC results. Every independent index, in this case the initial construction cost, lifespan of the equipment, discount rate and the amount of price inflation can affect the LCC results. Third, a GSHP system using an energy pile was installed on the site of the construction laboratory institute of the IIA. TPTs of W-shape and spiral-coil-type GHEs were conducted in continuous and intermittent operation modes, respectively, prior to system operation of the energy pile. A cooling GSHP system in the energy pile was operated in both the continuous and intermittent modes, and the LCC was calculated. Furthermore, the smart operation mode and LCC were analyzed considering the application of a thermal storage tank.

• 가족자원경영과 정책
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• 제16권3호
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• pp.67-82
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• 2012

The first local exchange trading system(LETS), established in Comox Valley in Canada, aimed at facilitating the regional economy. However, in Korea, LETS was adopted to encourage mutual aid and promote community spirit among residents. This study examines the feasibility of LETS as a revitalization initiative for Pumasi and suggests a number of policies that can be implemented to support the project. The findings are as follows: First, the LETS credit system was found to complement social capital initiatives among Pumasi participants in the early stages of the Pumasi project. Second, combining LETS and Pumasi initiatives was found to consolidate community spirit and encourage a cooperative way of life among participants due to the fact that LETS enlarges the scope of local residents' participation and diversifies the services being exchanged. A number of policy suggestions are made for combining LETS with Pumasi. First, the project must define a vision of its long-term purpose and outcomes. Second, local residents should be employed as assistants to facilitate the project. Third, Pumasi participants should ensure that childcare exchange services are of the highest quality by providing an educational program on parenting. Fourth, the project manager's employment conditions and working environments must be guaranteed.