• 한국가스학회:학술대회논문집
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• 한국가스학회 2001년도 추계학술발표회 논문집
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• pp.16-22
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• 2001

LNG demand has been rapidly increasing in Korea for a variety of reaso including stable supply, non- polluting, and high combustion efficiency characteris As a result the construction and expansion of LNG storage facilities have b continuing at a vigorous pace. One of the most important structural core elemen the LNG storage tank is the membrane, consisting of stainless steel. The memb to be applied inside of LNG storage tank is provided with corrugations to abs thermal contraction and expansion caused by LNG temperature. From the viewp of strength design, however. it is essential to confirm that the membrane undergo a stable deformation and has a sufficient fatigue strength Experim studies are presented to investigate the deformation and strength of the memb which is designed by Kogas. All experiments are conducted on the basis of RP and we found the results is fully satisfied with the RPIS.

• 한국가스학회지
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• 제9권2호
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• pp.16-21
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• 2005

LNG저장탱크에서의 컴프레션링의 역할은 콘크리트 벽체에 고정되어 Steel 루프 플레이트를 연결지지 하는 것이다. 구체적으로는 한쪽 끝부분은 콘크리트 벽체에 묻혀 고정되며 다른 쪽 끝부분은 루프 플레이트와 용접 연결되어 중첩된다. 이러한 조건에서 예측되는 하중 조건인 자중, 내부압력 및 콘크리트 무게에 대한 충분한 안전성을 확보하도록 설계되어야 한다. 본 논문에서는 유한요소법과 실제 시공 시 계측을 통해 획득한 데이터를 이용하여 콘크리트 타설 시공에 따른 컴프레션링의 거동을 파악하였다. 또한 설계변수 변화에 따른 컴프레션링의 거동을 분석한 결과를 기본으로 하여 보다 합리적인 설계법을 제시 하고자 하였다.

• 품질경영학회지
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• 제47권1호
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• pp.151-162
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• 2019

Purpose: This study is in order to secure high quality of military supplies, it is important to secure design quality in the development phase. I will review how to establish a quality assurance system in the development phase based on the author's seminar presentation contents and application example of Hanwha Systems Co., Ltd. Methods: To guarantee design quality in the development phase, in 2002, quality assurance system that is adequate for SQA(Software Quality Assurance)'s requirements of CMM(Capability Maturity Model) was conduct. In 2009, based on the CMMI(Capability Maturity Model Integration) Level 5, there has been continuous and reenforced quality assurance activities. Results: By suggesting the construction and a case study on application of R&D quality assurance, it would be helpful for companies aiming to construct or enhance quality assurance system. Conclusion: To secure high quality for military supplies, a development QA system should be established to secure quality in the development phase. In addition, Total life cycle QA system for development, mass production and operation phase should be reestablished.

• KIEAE Journal
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• 제16권3호
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• pp.13-23
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• 2016

Purpose: In this paper, based on the design drawings of Naju Agricultural Technology Learning Center by focusing on features of New-Hanok applied technology in the design and construction process of New-Hanok Type Public buildings by looking at the characteristics of the whole building is planned to be presented in the future development direction and value of public architecture applied to public buildings. Method: we first review the Phase 1 study results of technology development and application technology to look at the type and characteristics of the technologies applied in Naju Hanok Experience Agriculture Learning Center. As construction designs through the consultation suggestions reflect changes were seven times. By analyzing the changes in the basic design and conduct design in the process were organized for the new technologies applied and whether the application of existing technology hanok. Result: (1) Complements the shortcomings of technology and R & D to offer an alternative to the reinforcement was omitted modify the construction method or irrational process. (2) Implementation of a technique aiming to apply new-hanok workability and economic efficiency is based on a combination of the modern construction techniques and materials. (3) The use of modern materials to the extent that can assist in the purpose and function of the building are to be accommodated. (4) There is sufficient historical study and design plan for establishing identity is necessary in order to reflect the history and tradition of new-hanok public buildings.

• 한국경영과학회지
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• 제29권3호
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• pp.41-61
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• 2004

The purpose of this paper is to construct $\ulcorner$CIDEAR(Cross Impact-DEA-AR)$\lrcorner$ model which evaluates proposed R&D projects considering cross impact among them and selects proper projects to utilize resources efficiently as well as to maximize efficacy of investments. For this purpose, $\ulcorner$CIDEAR$\lrcorner$ model is designed as the following six steps. $\ulcorner$Decision Theory Evaluation Model$\lrcorner$ is for setting and selecting the evaluation items according to the structured procedure of evaluation system. The priority of items is decided at $\ulcorner$AR Decision Model$\lrcorner$$\ulcorner$Cross Impact Estimation Model$\lrcorner$ is for computing the final probability of success and the result is used to revise the evaluation results of $\ulcorner$Decision Theory Evaluation Model$\lrcorner$. $\ulcorner$Resource Performance Analysis Model$\lrcorner$ classifies the proposed R&D projects on the basis of required resources and expected performance. Consequently, the possibility of bias of project selection can be prevented. $\ulcorner$Priority Oder Decision Model$\lrcorner$ is for computing the efficacy of proposed projects. Finally, $\ulcorner$Efficacy-Efficiency Cause Analysis Model$\lrcorner$ analyzes the structure of efficacy and efficiency of the projects. The major findings and significances of this study are summarized as follows: (1) $\ulcorner$CIDEAR$\lrcorner$ model can deal with the affairs of R&D projects having the characteristics of mutual independence as well as mutual dependence in the point of efficacy and efficiency. Hence, it is possible to evaluate and select R&D projects more accurately. (2) It can be possible to raise the possibility of projects success. R&D manager can use the information for project management because the efficacy-efficiency structure of selected projects can be analyzed. (3) We proved the usefulness of the constructed $\ulcorner$CIDEAR$\lrcorner$ model using an case about twenty-one R&D projects of a leading company of electronic industry in Korea.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.485-490
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• 2009

The present study has been conducted to accomplish the investment and analysis, to make the construction manuals, to draw the standards, and to build quality and standards informations of the plumbing/drainage facilities materials. The application plan and the anticipation effect of this results include as follows. (1) The investment and analysis of the plumbing/drainage facilities materials is able to suggest the technology trends and the trends analysis in the construction materials. (2) The quality and standards informations of the plumbing/drainage facilities materials are possible to be the construction faculty and the cost/energy reduction in the construction materials. (3) The standards methods of the plumbing/drainage facilities materials are useful for the reliability guarantee and quality escalation in the construction materials. (4) The standard manuals of the plumbing/drainage facilities materials are applied to the specifications in the construction materials.

• 농촌지도와개발
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• 제23권4호
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• pp.419-429
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• 2016

This study focuses on the policy priorities for training agro-healing experts. Training agro-healing experts is an important task that should boost local community in rural areas. In order to make an efficient decision making, the study analyses priority of relevant policies using the AHP(Analytic Hierarchy Process) method. According to the results, R&D comes out first. Human Resource Development(HRD), financial support, and the construction of legal system comes after R&D. In R&D, qualifications and guidelines for participants comes out the most significant issue. In the aspect of HRD, it is very important to develop and utilize regional personnel such as unemployed youth and retirees from related fields. As for financial support, funding for educational facilities (i.e. classrooms and farmland for practice) is needed. In case of legal system, it is desirable to introduce the recruiting experts system and qualification system certified by government.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.23-26
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• 2005

This paper describes the design, construction and implementation of matrix converter based on space vector modulation technique. The matrix converter provides sinusoidal input and output wave forms, bidirectional power flow, controllable input power factor and a compact design, compared to the VSI with diode rectification stage at the input. The implemented prototype of matrix converter is built using the exclusive IGBT module and has an input filter, overvoltage protection circuit and commutation means for overcoming practical issues. The good results tested using an induction motor are also presented.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 B
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• pp.696-698
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• 2001

This paper considers the research of the hybrid interrupter which adopts both rotating arc and thermal expansion technology. The operating principle of this device depends on rapid arc rotation due to the magnetic field created by the fault current through a coil which is mounted on contacts and also relies on the principle of thermal expansion created by arc energy in extinguishing chamber and finally causes pressure rise in expansion volume. To develope this type of interrupter, we introduced analytical analysis including electromagnetic and arc fluid simulation and experimental analysis including construction of current source generation facility and arc behavior measurements. In this research, the principle of the interrupting techniques are given and analytical and experimental results of hybrid interrupter which is developed by new technology is introduced.

• Architectural research
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• 제2권1호
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• pp.55-60
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• 2000

Recently, there is a great demand for precast reinforced concrete (RC) construction methods on the purpose of simplicity in construction. Nishimatsu Construction Company has developed a construction method with precast reinforced concrete members in medium-rise building. In this construction method, how to joint precast members, especially the anchorage of the main bar of beam, is important problem. In this study, the structural performance of exterior joints with precast members was investigated. The parameters of the test specimens are anchorage type of the main bar of beam (U-shape anchorage or anchorage plate) and the ratio of the column axial force to the column strength. Specimens J-3 and J-4 used U-shape anchorage and the ratio of the column axial force of specimen J-4 was higher. On the other hand, specimens J-5 and J-6 used anchorage plate, and the anchorage lengths are 15d and 18d, respectively. Experimental results are summarized as follows; 1) For the joints with beam flexural failure mode, it was found that the maximum strength of specimen with anchorage plate is equal to or larger than that of specimen with conventional U-shaped anchorage if the anchorage length of more than 15d would be ensured, 2) Each specimen shows stable hysteretic curves and there were no notable effects on the hysteretic characteristics and the maximum strength caused by the anchorage method of beam main bar and the difference of column axial stress level.