• Nuclear Engineering and Technology
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• 제56권1호
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• pp.309-316
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• 2024

The U.S. Nuclear Regulatory Commission (NRC) Regulatory Guide (RG) 1.20 provides guidance on the comprehensive vibration assessment program (CVAP) to be performed on reactor internals during preoperational and startup tests. The purpose of the program is to identify loads that could cause vibration in the reactor internals and to ensure that these vibrations do not affect their structural integrity. The structural vibrational analysis program involves creating finite element analysis models of the reactor internals and calculating their structural responses when subjected to vibration loads. The appropriateness of the structural analysis methodology must be demonstrated through benchmarks or any other reasonable means. Although existing structural analysis methodologies have been proven to be appropriate and are widely used, this paper presents the development of an improved new structural analysis methodology for APR1400 reactor internals using scaled model tests.

• 한국군사과학기술학회지
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• 제22권1호
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• pp.124-134
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• 2019

As the types of North Korea's provocation are diverse and unexpectable in the costal area, ROK navy needs to develop countermeasures, such as costal defence guided rockets. Recently ROK navy developed the PKX-B which is equipped with the new 130 mm guided rocket. The most popular rockets are LOGIR for short range targets, 130 mm guided rocket for middle range targets and Spike-NLOS for long range targets. As various guided rockets are developed, it is required to develop a guided rocket analysis model and it's analysis methodology. In addition, these guided rockets can be installed on any platforms; ground vehicle, aircraft and warship. The paper proposes systematic methodology to estimate the operational effectiveness of costal defence guided rockets. A case study exploiting the ARENA simulation model is explained to demonstrate the implementation of the proposed methodology.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2001년도 춘계학술대회 논문집
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• pp.643-646
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• 2001

This paper investigates the structural analysis and design of mechanical heart valve through the numerical analysis methodology. In a numerical analysis methodology application to the thickness minimization structural design of mechanical heart valve, structural analysis is performed for the blood flow through a bileaflet mechanical heart valve. The structural static analysis is carried out to confirm the thickness minimization structural condition (minimum thickness shape of leaflet).

• 한국국방경영분석학회지
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• 제36권3호
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• pp.95-111
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• 2010

NCO(Network Centric Operation) 효과분석과 관련된 요소 및 이들 간 관계는 PCO(Platform Centric Operation)의 그것과 비교하여 복잡하다. 그러나 기존 효과분석모델은 단위 효과요소관점의 효과분석방법을 제시하여, 복잡한 NCO의 효과분석을 위해서는 엔터프라이즈 관점의 통합된 효과분석과 공통언어로 활용 가능한 효과분석모델 개발이 시급한 상태다. EA(Enterprise Architecture)는 공통언어 가능의 참조모델과 이에 순응하는 적용모델 개념을 도입하여 엔터프라이즈의 변화와 복잡도를 관리한다. 본 연구는 EA의 특성인 참조 및 적용모델 개념을 도입한 '참조모델기반 NCO 효과분석모델 개발방법'을 제시한다. 이를 위해 첫째 참조 및 적용모델 개념을 가진 EA를 연구하며, 둘째, NCO 및 C2 효과분석 절차 몇 모델 분석과 모델 구성요소 식별과 관계설정을 위한 방법을 연구하며, 셋째, 연구된 내용을 바탕으로 참조모델기반 NCO 효과분석모델 개발방법을 제시하고, 마지막으로 제시된 방법에 따라 사례를 개발하여 제시한 방법의 효과성을 입증한다.

• 한국해양공학회지
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• 제20권3호
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• pp.54-60
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• 2006

For optimal design of a deep-sea ocean mining collector system, based on self-propelled mining vehicle, it is imperative to develop and validate the dynamic model of a tracked vehicle traveling on soft deep seabed. The purpose of this paper is to evaluate the fidelity of the dynamic simulation model by means of response surface methodology. Various statistical techniques related to response surface methodology, such as outlier analysis, detection of interaction effect, analysis of variance, inference of the significance of design variables, and global sensitivity analysis, are examined. To obtain a plausible response surface model, maximum entropy sampling is adopted. From statistical analysis and prediction for dynamic responses of the tracked vehicle, conclusions will be drawn about the accuracy of the dynamic model and the performance of the response surface model.

• 산업공학
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• 제16권1호
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• pp.70-84
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• 2003

Recently, object-oriented techniques have been used more and more for developments of an information system. But, established object-oriented methodologies are hard to express a business process of various abstract degrees in the analysis level and independent components of the system. They have difficulties in developing a large-scale information system of manufacturing industry such as PDM and CIM. This paper proposes an information system development methodology that imports the object-oriented IDEF0 (OOIDEF0) function model in analysis level. This methodology is made up of requirements gathering, system analysis, system design, and implementation. In requirements gathering level, organization diagram and interview technique are used for input data of OOIDEF0 function model. The OOIDEF0 function model, the interface model and function descriptions are made out in analysis level. Information objects and implementation objects are designed on the basis of the OOIDEF0 function model in design level. The database is built and programming is accomplished in implementation level. In order to prove the consistency and efficiency of the proposed methodology, the PDM system for ship production is modeled and prototyped.

• 스마트미디어저널
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• 제12권9호
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• pp.116-123
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• 2023

본 연구에서는 MORPG PC 게임에서 초심자와 전문가 그룹 간의 게임 조작계를 중심으로 한 조작 방식의 차이에 대해 기술하고, 이를 분석하기 위한 방법론에 집중하고자 한다. 우선 MORPG에서 흔히 사용하는 캐릭터 움직임에 대한 조작계를 중심으로 초심자와 전문가 그룹을 구분 지을 수 있는 가설을 수립하고, 이러한 구분을 통해 조작계에 관련된 손가락 움직임 데이터와 키 Stroke 데이터가 향후 MORPG 조작계 분석에 유의미하게 활용될 수 있는가를 분석하였다. 이러한 분석 결과를 바탕으로, 기존의 단순 키 Stroke를 통한 분석이 아닌, 손가락 움직임 데이터와 키 Stroke 분석을 결합시킨 분석 방법론이 향후 PC MORPG 게임 조작계에 대한 유저테스트 방법론으로서 의미가 있다는 것을 보였다.

• 한국가스학회지
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• 제3권2호
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• pp.34-42
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• 1999

회분식 공정의 HAZOP 분석 기법은 연속 공정의 HAZOP 분석 기법과는 달리 time과 sequence라는 이산적인 변수들을 고려해야 한다. 회분식 공정의 time과 sequence 해석은 연속 공정의 HAZOP 분석 기법으로는 설명될 수 없으므로, 이산 변수들과 연속 변수들의 관계를 이용하여 회분식 공정의 HAZOP 분석을 수행하는 방법을 개발하였다 본 연구에서는 이 방법을 Latex 제조 공정에 적용하여 그 실효성을 검토하였다.

• 한국경영과학회지
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• 제21권3호
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• pp.175-195
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• 1996

In conventional analysis methods, data and process are loosely coupled for building information systems. Several object oriented approaches have been proposed to integrate data and process. However, object oriented analysis requires a radical paradigm and thus system analysts find difficulties in generating object models direcctly from end users. To alleviate these difficulties, this paper proposes a methodology for deriving an object model by using structured analysis results. Objects are obtianed primarily from entities in Entity-Relationship Diagram. Methods are obtained through the analysis of the relationship between processes and data stores in Data Flow Diagram Methods are assigned to the objects by using object/process matrices. A real-life case is illustrated to demonstrate the usefulness of the methodology.

• 경영과학
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• 제31권4호
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• pp.1-13
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• 2014

This study aims to expand the future study methodology and to develop a methodology of future-oriented curriculum analysis with future skills needs derived from patent analysis. With the case of information security, the methodology is applied to the 16 universities, which have information security department in undergraduate course. From the results, the followings are suggested : 1) for the increasing importance area including hacking, infiltration and PC security, a practical exercise should be emphasized; 2) for the convergence area including security policy, security legislation and OS security, proper faculties should be filed with recruiting field-based experts; 3) for the increasing importance area including professional area including security audit and information security protocol, the advanced curriculum related to graduate level should be provided.