• Structural Engineering and Mechanics
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• 제78권4호
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• pp.387-401
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• 2021

This paper provides a methodology to analyze the seismic performance of different component designs in hybrid masonry structures (HMS). HMS, comprised of masonry panels, steel frames and plate connectors is a relatively new structural system with potential applications in high seismic areas. HMS dissipate earthquake energy through yielding in the steel components and damage in the masonry panels. Currently, there are no complete codes to assist with the design of the energy dissipation components of HMS and there have been no computational studies performed to aid in the understanding of the system energy dissipation mechanisms. This paper presents parametric studies based on calibrated computational models to extrapolate the test data to a wider range of connector strengths and more varied reinforcement patterns and reinforcement ratios of the masonry panels. The results of the numerical studies are used to provide a methodology to examine the effect of connector strength and masonry panel design on the energy dissipation in HMS systems. We use as test cases two story structures subjected to cyclic loading due to the availability of experimental data for these configurations. The methodology presented is however general and can be applied to arbitrary panel geometries, and column and story numbers.

• Nuclear Engineering and Technology
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• 제51권4호
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• pp.1024-1031
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• 2019

The Molten Salt Fast Reactor (MSFR) with its liquid circulating fuel and its fast neutron spectrum calls for a new safety approach including technological neutral methodologies and analysis tools adapted to early design phases. In the frame of the Horizon2020 program SAMOFAR (Safety Assessment of the Molten Salt Fast Reactor) a safety approach suitable for Molten Salt Reactors is being developed and applied to the MSFR. After a description of the MSFR reference design, this paper focuses on the identification of the Postulated Initiating Events (PIEs), which is a core part of the global assessment methodology. To fulfil this task, the Functional Failure Mode and Effect Analysis (FFMEA) and the Master Logic Diagram (MLD) are selected and employed separately in order to be as exhaustive as possible in the identification of the initiating events of the system. Finally, an extract of the list of PIEs, selected as the most representative events resulting from the implementation of both methods, is presented to illustrate the methodology and some of the outcomes of the methods are compared in order to highlight symbioses and differences between the MLD and the FFMEA.

• 디지털융복합연구
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• 제14권9호
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• pp.19-29
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• 2016

본 연구는 근로능력이 있는 빈곤층의 삶의 경험과 탈수급/탈빈곤 전망을 혼합방법론 중 순차적 탐구전략을 활용하여 질적 양적으로 분석하였다. 이를 위해 우선 한국복지패널 연계 질적패널의 1-3차 웨이브 중 근로능력이 있는 14인의 빈곤 가구주의 인터뷰를 분석하여, 이들이 3년간 경험한 삶의 변화를 탈빈곤 전망 맥락에서 제시하였다. 이후 질적분석에서 도출한 가설을 양적분석으로 확인하는 순차적 탐구전략에 따라, 빈곤층의 교육수준이 생활전망 및 자존감을 매개로하여 탈수급/탈빈곤 전망에 영향을 미친다는 가설을 설정하고, 한국복지패널 7차년도 자료를 활용하여 변량분석과 구조방정식을 통하여 가설을 검증하였다. 그 결과, 교육수준은 그 자체가 아니라 생활전망이라는 심리적 요인을 매개로 하여 탈수급/탈빈곤 전망에 영향을 미치고 있음을 확인할 수 있었고, 이는 향후 탈빈곤정책이 물질적 지원 외에도 빈곤층의 생활전망을 제고하는 심리적 차원을 고려해야 한다는 함의를 제시하고 있다.

• 한국의류산업학회지
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• 제12권3호
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• pp.354-363
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• 2010

The purpose of this study was to provide some preliminary results on application of 3D scan data of head shapes to the hat design and pattern-making. This paper defined necessary measurement items and concepts in 3-dimensional images of head shapes. And also it presented the methodology to pattern-making of 6-piece crown hat based on 3D data. It used the data of Size Korea to pick up and choose a head shape model with the average head size of Korean women in their twenties. Main results were: 1. The 3D scan data of head shape was better than the 1 dimensional measurement data. Because I could establish a hat pattern-making theory by the 3D scan data of head. 2. The 3D scan data provided the basis for conceptualization of basic measurement points and items for a better fit of hats as well as the definition of the basic hat circumference. 3. This presented a methodology for analyzing out head shape by 3D scan data, and allowed the derivation of the basic hat circumference from the maximum head circumference. 4. As the 6-piece Crown cloche hat made by this method fitted the head shape model perfectly, this methodology could suggest potential applicability to various hat design.

• 대한기계학회논문집A
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• 제26권2호
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• pp.365-373
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• 2002

For gas turbine engines, the safe life methodology has historically been used fur fatigue life management of failure critical engine components. The safe retirement limit is necessarily determined by a conservative life evaluation procedure, thereby many components which have a long residual life are discarded. The objective of this study is to introduce the damage tolerant design concept into the life management for aircraft engine component instead of conservative fatigue life methodology which has been used for both design and maintenance. Crack growth data were collected on a nickel base superalloy which have been subjected to combined static and cyclic loading at elevated temperatures. Stress analysis fur turbine disk was carried out. The program for computing creep-fatigue crack growth was developed. The residual lifes of turbine disk component under various temperatures and conditions using creep-fatigue crack growth data were estimated. As the result of analysis, it was confirmed that retirement fur cause concept was applicable to the evaluation of residual life of retired turbine disk which had been designed based on the conventional fatigue life methodology.

• 유통과학연구
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• 제21권9호
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• pp.43-53
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• 2023

Purpose: This study aims to examine the demographic similarities and differences in objectives, methodology, and findings of previous studies in the context of gaining financial literacy using videos. This study employs a systematic review design. Research design, data and methodology: Based on the content analysis method, 15 articles were chosen from Scopus and Science Direct during 2015-2020. After formulating the research questions, the paper identification process, screening, eligibility, and quality appraisal are discussed in the methodology. The keywords for the advanced search included "Financial literacy," "Financial Education," and "Video". Results: The results of this study indicate the effectiveness of learning financial literacy using videos. Significant results were obtained when students interacted with the video content distribution. The findings of this study provide an overview and lead to a better understanding of the use of video in financial literacy. Conclusions: This study is important as a guide for educators in future research and practice planning. A systematic review on this topic is the research gap. Video learning was active learning that involved student-centered activities that help students engage with financial literacy. By conducting a systematic review, researchers and readers may also understand how extending an individual's financial literacy may change after financial education.

• 한국산학기술학회논문지
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• 제10권10호
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• pp.2900-2906
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• 2009

e-health 시스템은 의료부문에 관련된 이해당사자들에게 의료서비스와 정보를 정보통신기술을 이용하여 제공하는 것이다. 이런 상황에서 보건의료 분야에서 'e-Health' 시스템의 구축을 통해서 보건의료부문의 효율성 증진, 서비스질의 향상, 의료비용의 감소 그리고 관련 산업 발전에 따른 대외경쟁력 강화를 위한 돌파구를 마련하고 있다. 의료분야가 다른 산업분야에 비해서 매우 전문적이고 폐쇄적이어서, 인터넷 기술을 적용하는데 어려움이 많다. 그래서 인터넷의 사용자 중심적인 속성을 의료분야에 활성화시켜야 소정의 목적을 이룰 수 있을 것이다. 본 연구에서는 의료 부문에서의 인터넷을 이용한 e-Health 시스템의 개념과 특성 그리고 유형을 고찰하고, 한국의 의료부문을 위한 e-Health 시스템의 구축을 위한 보다 진보된 새로운 개념의 설계 방법론을 연구하기로 한다. 본 연구자에 의해 제안된 발전된 모형의 방법론을 AHP 기법을 이용하여 그 타당성과 적용가능성을 검증해보도록 한다. 본 연구는 e-Health 시스템의 발전 및 활성화를 위한 정책개발 및 실현에 기초자료가 될 수 있을 것으로 기대한다.

• 한국가스학회지
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• 제19권5호
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• pp.81-86
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• 2015

배관설계에 있어 스트레스에 기반한 결정론적 방법이 전통적으로 사용되어 왔다. 한편, 신뢰도기반 설계 및 평가(RBDA) 방법론은 해양 또는 원자력 구조물에 대해 적용되어 왔다. 최근 들어 배관의 한계상태법에 기반한 신뢰도에 대해 ISO 규격 즉, ISO 16708의 출간은 RDBA 방법론이 천연가스배관 설계의 최신방향 중에 하나라는 것을 보여준다. 본 논문은 부식결함을 가진 배관의 시간 의존적 파손 확률을 예측하는 절차에 대한 사례연구를 보여준다. 여기서 전통적인 부식 배관의 신뢰도를 추정하는 데 crude Monte Carlo (CMC) 법을 사용하는 대신에 separable Monte Carlo (SMC) method 적용한다. 그 결과 SMC 방법은 신뢰도 계산에 효율을 향상시키는 장점을 보여준다.

• 한국정밀공학회지
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• 제28권10호
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• pp.1196-1203
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• 2011

Statistical optimum methodology of table of orthogonal array, ANOM, ANOVA and RSM are applied to formulate optimum allocation design with design variables. It can be minimized average SPL of control volume, the objective function in closed system by optimal allocated positions of absorbing material. Structural natural frequency and acoustic natural frequency of cavity are analyzed by FEM and BEM in the closed system. Using BEM, average SPL of specific control volume is calculated according to the condition before using absorbing material and after using it. It is shown that noise is reduced by $5.02dB_{RMS}$ by absorbing material located at optimal position and minimum $1.83dB_{RMS}$ and maximum $3.47dB_{RMS}$ by the table of orthogonal array.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2003년도 학술대회지
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• pp.377-383
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• 2003

In this study, the methodology for determination of shoulder height in the internal shape design of ball bearing using 3D contact analysis is proposed. The quasi-static analysis of a ball bearing was performed to calculate the distribution of applied contact load and angles among the rolling elements. From each rolling element loads and the contact geometry between ball and inner/outer raceway, 3D contact analyses using influence function are conducted. These methodology is applied to HDD ball bearing. The critical axial load and the critical shoulder height which are not affected by edge in the present shoulder height is calculated. The proposed methodology may be applied to other rolling element bearing for the purpose of reducing the material cost and improving the efficiency of the bearing design process.