• 산업경영시스템학회지
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• 제41권4호
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• pp.111-122
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• 2018

The private sector is currently reviewing the feasibility of the project or deciding economic policies by analyzing the economic ripple effects. However, the arms acquisition project focuses on the need for the national defense weapons system by analyzing the costs and the effectiveness of the analysis and reviewing the necessity and feasibility of the project. In order to analyze the economic ripple effects, KB (the Bank of Korea) prepares and publishes an analysis table of industrial associations in a given unit. IAAR (the industrial association analysis report) is difficult to apply directly to the defense weapons system. Therefore, research on the economic ripple effects applicable to the defense arms procurement project was needed. In this study, we propose the generic methodology for estimating economical and technical ripple effects resulted in acquiring new weapon systems. Based on the analysis of inter-industrial relations, economical ripple effects are estimated with production inducing effects, value-induced effects, employment-induced effects and export-induced effects. Also, the technological ripple effects are estimated with technological intensity represented by investment cost in research and development. To show the validity of proposed methodology, a case study of acquiring new weapon systems such as GR (guided rocket), destroyer, and helicopter is accomplished. From the case study, it is concluded that these economical & technological ripple effects can be used as a reference to decision making in the course of acquiring major future defense weapons systems.

• 한국심리학회지 : 문화 및 사회문제
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• 제23권4호
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• pp.557-585
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• 2017

본 연구에서는 파급효과를 예측하는 것에 따라 의사결정의 어려움이 달라지는지, 그리고 파급효과 예측과 의사결정 어려움 사이의 관계를 의사결정 결과에 대한 책임감과 부담감이 매개하는지 살펴보았다. 연구 1에서는 정책 결정 상황을 제시하여 예측된 파급효과의 크기와 의사결정 어려움 간의 관계를 알아보았다. 그 결과, 결정의 파급효과를 크게 예측할수록 의사결정 시 어려움을 더 크게 경험한 것으로 나타났다. 연구 2에서는 예상되는 파급효과의 크기를 실험적으로 조작하여, 파급효과를 크게 예상하도록 한 조건과 작게 예상하도록 한 조건 사이에서 도덕적 의사결정을 내릴 때 경험하는 어려움의 정도가 다른지 알아보았다. 또한, 예측된 파급효과의 크기와 의사결정 어려움 사이의 관계를 의사결정 결과에 대한 책임감과 부담감이 매개하는지 검증하였다. 그 결과, 가설과 일관되게 예측된 파급효과의 크기가 작은 조건에 비하여 큰 조건에서 위해/돌봄, 공정/호혜, 그리고 내집단/충성심 관련 도덕적 의사결정 시 어려움을 더 크게 경험하는 것으로 나타났다. 이러한 관계를 의사결정 결과에 대한 책임감과 부담감이 매개하는지 살펴본 결과, 부담감의 매개효과가 내집단/충성심 관련 도덕적 의사결정에서 관찰되었다. 이러한 연구 결과를 토대로 본 연구의 의의와 제한점, 그리고 후속 연구 방향에 대하여 논하였다.

• International Journal of Contents
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• 제6권1호
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• pp.20-25
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• 2010

This paper discusses an academic study on electronic games and their incredibly vast and rapid growth over the years. It specifically addresses the evolution of electronic games from the 1960s to today, the ripple effects of electronic games, and the development of electronic game platforms. In terms of scope, the study first describes the ripple effects of the emergence of electronic games in chronological order and from the "immersion" and "convergence" perspectives, and then explores the evolution of electronic game platforms such as arcade machines, video consoles, personal computers, and mobile game devices.

• International Journal of Advanced Culture Technology
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• 제11권3호
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• pp.83-88
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• 2023

The increasing global average temperature and the emergence of various abnormal climate phenomena are already being experienced in reality. The problems arising from climate change are expanding and becoming catastrophic, despite the efforts of various organizations to prevent them. In order to avoid climate issues from becoming black elephants, we conducted interviews with emergency planning officer from various institutions to identify potential X-events caused by climate change. The results of analyzing the anticipated X-events by these emergency planning officer revealed a chain of ripple effects associated with their occurrence. This implies that once an X-event happens, its influence is broader and more significant. Through this study, we aim to share the understanding of the ripple effects of climate X-events with many people, raising awareness of the severity of climate issues. We hope that this will serve as a starting point for more institutions, individuals, and nations to make efforts in resolving climate problems, turning X-events into opportunities rather than crises.

• 산업경영시스템학회지
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• 제38권4호
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• pp.39-44
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• 2015

The VHTR (Very High Temperature gas-cooled nuclear Reactor) has been considered as a major heat source and the most safe generation IV type reactor for mass hydrogen production to prepare for the hydrogen economy era. The VHTR satisfies goals for the GIF (Generation IV International Forum) policy such as sustainablility, economics, reliability and proliferation resistance and physical protection, and safety. As a part of a VHTR economic analysis, we have studied the VHTR construction cost and operation and maintenance cost. However, it is somewhat difficult to expect the ripple effect on the whole industry due to the lack of information about Inter-industries relationship. In many case, the ripple effect are based on experts' knowledge or uncertain qualitative assumptions. As a result, we propose quantitative analysis techniques for ripple effects such as the production inducement effect, added value inducement effect, and employment inducement effect for VHTR 600MWt${\times}$4 modules construction and operation ripple effect based on NOAK (Nth Of A Kind). Because inducement effect values have been published annually, we predict inducement effect's relation function and estimated values including production inducement effect value, added value inducement effect value, and employment inducement effect value using time series and estimated values are verified with published inducement effects' value. This paper presents a new method for the ripple effect and preliminary ripple effect consequence using a time series analysis and inter-industry table. This ripple effect analysis techniques can be applied to effect expectation analysis as well as other type reactor's ripple effect analysis including VHTR for process heat.

• 조명전기설비학회논문지
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• 제18권6호
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• pp.230-237
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• 2004

본 논문에서는 인버터에서 발생하는 맥동전류가 양자 교환막형 연료전지에 미치는 영향을 임피던스 모델을 통하여 분석한다. 제안된 방법은 주파수 응답 분석법을 이용하여 연료전지 스택의 등가 임피던스를 유도하고, 유도된 모델을 이용하여 맥동전류의 영향을 분석한다. 모델을 통해 계산된 결과는 상용 연료전지 스택을 사용한 실험을 통하여 증명된다. 실험결과는 인버터에 의해 발생한 맥동전류로 인해 최대 10(%)까지 연료전지 스택의 출력이 감소할 수 있음을 보인다.

• 국제학술발표논문집
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• The 7th International Conference on Construction Engineering and Project Management Summit Forum on Sustainable Construction and Management
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• pp.62-72
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• 2017

In this study, liner unit root tests and panel unit root tests to the ratio of city to regional house price were applied to examine the ripple effects across 28 cities in the Yangtze River Delta region. Then invert LM unit root tests with two structural breaks for 10 representative cities were conducted. The results showed that there is overwhelming evidence of the existence of ripple effect in the Yangtze River Delta region, while segmentation is restricted to a small group of cities in which there is no long-run relationship with the Yangtze River Delta region average; compared to no- and one-break case, there is overwhelming evidence of a ripple effect with the LM test with two structural breaks. Furthermore, the results of the Granger causality test showed that changes in house prices in Shanghai, Nanjing and Hangzhou have led to changes in house prices in other cities. The findings of this research make certain contributions to the improvements of research system of ripple effect among regional house prices in the Yangtze River Delta Region,and could be referenced by other markets of other cities.

• 국제지역연구
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• 제12권3호
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• pp.269-291
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• 2008

비즈니스 성격의 회의, 인센티브관광, 컨벤션, 전시를 아우르는 MICE산업은 수익성이 낮은 우리나라 관광구조를 개선시키기 위해 육성할 필요가 높은 산업으로 제시되고 있다. 이를 위해 개선이 요구되는 발전요인과 정부 및 전담기구의 역할, MICE산업의 파급효과 간 관계를 전문가들의 인식을 바탕으로 파악해 보았다. 그 결과, MICE산업 발전요인으로 마케팅요인과 인적자원 육성 요인이 제시되었으며, MICE 산업의 파급효과는 경제적 효과와 국가홍보 효과요인으로 압축되었다. 요인들 간의 구조모형분석결과, 여러 가지 시사점을 도출할 수 있었다. MICE 발전의 마케팅요인은 정부의 역할에 유의한 영향을 끼친 반면, 전담기구의 역할과는 유의한 영향관계를 보이지 않았다. 반면, 인적자원 육성요인은 정부와 전담기구의 역할 모두에 유의한 영향관계를 가지는 것으로 분석되었다. 그리고, 정부의 역할은 전담기구의 역할에 유의한 영향관계에 있으며, 정부의 역할과 전담기구의 역할은 MICE산업의 경제적 효과와 국가홍보의 효과에 모두 유의한 영향을 주는 것으로 나타났다.

• Journal of Electrical Engineering and Technology
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• 제10권6호
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• pp.2307-2314
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• 2015

In this paper, a discontinuous conduction mode (DCM) frequency control algorithm is proposed to reduce the input current ripple of a multi-phase interleaved boost converter. Unlike conventional variable duty and constant frequency control, the proposed algorithm controls the switching frequency to regulate the output voltage. By fixing the duty ratio at 1/N in the N-phase interleaved boost converter, the input current ripple can be minimized by ripple cancellation. Furthermore, the negative effects of the diode reverse recovery current are eliminated because of the DCM characteristic. A frequency controller is designed to employ the proposed algorithm considering the magnetic permeability change. The proposed algorithm is analyzed in the frequency domain and verified by a 600 W three-phase boost converter prototype that achieved 57% ripple current reduction.

• 한국자동차공학회논문집
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• 제11권3호
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• pp.106-114
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• 2003

The pressure ripple in the delivery port is caused by flow ripple, which is induced by variation of pumping chamber volume. The other reason is the reverse flow from the outlet volume produced by pressure difference between pumping chamber and outlet volume, when the pumping chamber is connected with the outlet volume. In this study, a mathematical model is presented for analyzing discharge pressure ripple, which includes vane detachment, cam ring movement , and fluid inertia effects in V-groove in the side plate. From the analysis and experiment, it was found that V-groove on the side plate, coefficient of spring supporting the cam ring, and average discharge pressure are the main factors of discharge pressure ripple in variable displacement vane pump. The theoretical results, provided in this study, were well agreed with experimental results. The analytical model to estimate the magnitude of pressure ripple in this study is expected to be used f3r the optimal design of the variable displacement vane pump.