파이프 제조 공정을 포함하는 다단자동단조공정의 해석 및 설계

엄재근(Eom Jae Gun),김해지(Kim Hae Ji),전만수(Joun Man Soo),박상균(Park Sang Gyun),류성욱(Lyoo Song Wook) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6

In this paper, special topics in automatic forging simulation of the automatic multi-stage cold forging processes are studied and the related techniques are presented with their application example. The characteristics of the processes are taken into account with emphasis on the forging simulation. The flow stress of a mild steel SWCH10A in large strain is achieved by using the results of the tensile test. Special frictional conditions of the automatic multi-stage forging processes are considered. The presented approach is applied to developing a near-optimal process for mass production of the inner tube of an automotive part by an automatic multi-stage forging machine.

창업자의 창업 실패 모형에 대한 탐색적 연구: 시스템 사고에 의한 접근

엄재근 ( Eom Jae-gun ),김회춘 ( Kim Hoi-choon ) 한국시스템다이내믹스학회 2017 한국시스템다이내믹스 연구 Vol.18 No.3

Most founders have failed. Why do many startups fail ? We can consider there is a single-minded thought that people easily think about entrepreneurship. Anyone can start a business, but very few people succeed in starting a business. This is because the process of entrepreneurship has a complex structure beyond simple structure. In this paper, the structure of entrepreneurship is approached by system dynamics. The structure explains the interaction of the founder with the entrepreneurial environment and the entrepreneurial resource through causal loop diagram. This paper is an exploratory study on the factors of start - up failure. It is used to analyze the entrepreneurial structure based on the theory of reasoned action and ser-M theory. It will give the meaningful points through systems thinking approach to the people who prepare for start-up.

기업의 Big Bath 분석에 대한 시스템 사고에 의한 접근: 한국 조선업을 중심으로

엄재근 ( Eom Jae-gun ),권경헌 ( Kwon Kyung-heon ),김회춘 ( Kim Hoi-choon ) 한국시스템다이내믹스학회 2017 한국시스템다이내믹스 연구 Vol.18 No.2

The purpose of this study is to study the structural problems regarding the Big Bath related to earnings management to companies. This paper examines the behavior of Big Bath on CEO changes and suggests alternatives to structural problems. CEO are always tempted to control earnings. This is because the ability of CEO is evaluated according to how much profit the company makes. It is natural that it is necessary to raise profits under CEO`s management, but it is very difficult actually. Earnings adjustments under accounting method can be made easily. The previous study showed a new CEO had tried to arrange the bad debts through the allowance for accounts receivable loss as much as possible. In other words, the new CEO does not have responsibility for management on the first year. Through it, a new CEO can show the improvement in earnings from the following year and receive the trust from shareholders and investors. In this study, we will look at the system structure of the Big Bath. Through this, we will look at the problems of the structure of the company and consider the alternative.

국제통상에서 KIKO 파생금융상품과 그 영향에 대한 시스템 다이내믹스 시뮬레이션

엄재근 ( Jae Gun Eom ),정창권 ( Chang Kwon Chung ) 한국시스템다이내믹스학회 2014 한국시스템다이내믹스 연구 Vol.15 No.4

Derivatives can be easily bought by those companies that need to hedge foreign currency debt or foreign currency assets through the financial market, considering their exchange rate exposure from international trade. The derivatives market has been growing rapidly due to the needs for investment and hedging. To manage foreign exchange risk, companies hedge risks through financial derivatives. According to our study, hedging is an effective way to mitigate the impact of exposure to exchange risk, as long as companies are only hedging underlying assets. Yet, covetous attitude toward the profit from derivatives and unexpected changes in exchange rate can cause problems for companies. This study analyzed the structural risks of derivatives with analysis of system dynamics. In particular, many companies suffered substantial loss due to KIKO during the economic crisis. We explained the problem therein through dynamic analysis. In addition, we revealed the structural problem that could cause a sudden spike in losses through simulations.

환노출과 환노출 완화 전략의 인과관계에 관한 탐색적 연구: 시스템 사고에 의한 접근

엄재근 ( Jae Gun Eom ),정창권 ( Chang Kwon Chung ),설원식 ( Won Sik Sul ) 한국시스템다이내믹스학회 2014 한국시스템다이내믹스 연구 Vol.15 No.2

The purpose of this study is to analyze Foreign Exchange (FX) exposure and FX hedge strategy based on the systems thinking perspective using causal loop diagrams. FX exposure has been a critical issue on a business management. Many studies in Korea have researches on variables which make effects to the company value. This study displays causal loop diagrams (CLDs) on these issues. In order to make CLD more objective, most causalities are articulated from recent 72 studies (1998~2013) of domestic top journals. This approach is valuable in that it is the first try to draw all the causalities from various literature review regarding FX exposure and FX hedge strategy. This study is expected to make a useful and basic material to research the financial issues of corporate, as the first research to dynamically understand FX exposure and FX hedge strategy.

폐쇄단조용 복동링크유압식 다이세트의 링크의 정역학적 해석과 구조해석

엄재근(Jae Gun Eom),전병원(Byoung Yoon Jun),전만수(Man Soo Joun) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.10

기업 안전문화 수준평가에 관한 연구 - 화학물질취급 기업 사례를 중심으로 -

엄재근(Jae Gun Eom),이규식(Guy Sik Lee),이동윤(Dong Yoon Lee),조규선(Guy Sun Cho) 한국가스학회 2023 한국가스학회 학술대회논문집 Vol.2023 No.5

고변형률에서 진응력-진변형률 곡선의 표현을 위한 새로운 구성방정식의 제안

엄재근(Jae Gun Eom),지창운(Chang Woon Jee),전만수(Man Soo Joun) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11

In this paper a new constitutive law is presented for modeling the material behavior of the true stress-strain curves in room temperatures. The problems of the Hollomon’s constitutive law, which has been most commonly used, are given from the standpoint of the tensile test. An accurate method of acquisition of stressstrain curves over large strain up to 1.0 from the tensile test results of engineering stress-strain curves is introduced. A new constitutive law is proposed by modifying the Hollomon’s constitutive law with emphasis on the tensile test. The validity of the presented constitutive law is verified by applying it to the tensile test of an annnealed SWCH10A bar, drawn after rolled, and comparing the experiments and the predictions.

한국 기업의 채용평가와 직무성과의 관계성에 관한 사례 분석

이재영 ( Jae-yong Lee ),엄재근 ( Jae-gun Eom ) 국제지역학회 2016 국제지역연구 Vol.20 No.4

Recently, many companies consider various methods for hiring employees. Hiring talent employee has made influences on the future of the company. Therefore, companies spend a lot of money for developing many tools on hiring employee. But most of companies don`t try to review the comparison between the assessment system of hire and performance. There is few research on the performance results from the assessment scores of hiring. Only, the companies focus on hiring good employee who have good ability. Sometimes, HR managers are satisfied only with low quit rate. The paper analyzes what kind of relevance between the hire assessment and performance assessment for the same people. It uses the actual data for A company. This is very useful data for research on the relevance between hire and perform assessment. We can consider what the important things are for hiring and managing employee.

은행의 수익성에 영향을 미치는 요인에 관한 연구

김미경(Mi-Kyung Kim),엄재근(Jae-Gun Eom) 한국콘텐츠학회 2018 한국콘텐츠학회논문지 Vol.18 No.1

은행의 수익성과 관련하여 어떠한 요인들이 영향을 미치는지 연구하고 있다. 본 연구에서는 은행의 수익성 개선을 위한 자금조달구조의 다양화 측면에서 기존연구와 달리 시장성수신비중을 주요 관심변수로 하여 8개의 설명변수와 총자산영업이익률을 수익성 지표로 사용하여 가설설정하고 전체기간과 금융위기 전 · 후 로 비교 분석하여 차이를 보고자 한다. 다중회귀분석한 결과, 모든 분석기간에서 유의미한 결과가 나타나는 수익성 요인은 원화예대금리차, 점포수, 고정이하여신비율이며 국내은행은 원화예대금리차가 커지고 점포수가 증가할수록 수익성도 향상되고 부실여신이 증가하면 수익성도 하락하는 것을 알 수 있다. 시장성수신비중은 은행의 수익성에 통계적으로 유의미한 영향을 주지는 못하는 것으로 나타났다. 글로벌 금융위기이전에는 거시경제지표의 영향을 받기 보다는 개별 은행의 상황 및 다른 금융환경의 영향을 더 받았다는 것을 알 수 있으며 금융위기이후에는 은행의 여신이 증가하면서 수익성도 향상되는 것으로 추정할 수 있다. 은행의 수익성 요인은 분석 기간별 특징이 있다고 추론되며 이에 그 의미와 시사점을 가진다. 향후 은행산업의 수익성에 관한 연구는 특수은행이 포함된 국내은행 전체로 대상을 확대할 필요가 있다. This study is founded on banks` profitability factors. Unlike the previous study in terms of diversification of the banks` funding structure, this research performs multiple regression analysis during the entire period and examines the comparative analysis of before and after the financial crisis. the study establishes hypotheses by using the wholesale funding ratio as a key focus variable with 8 explanatory variables and the operating profit on assets as a profitability index. The Loan-deposit rate gap, the Number of stores and the Non-performing loan ratio prove to be a significant profitability factor for all periods of time. Korean banks are also more profitable when their the Loan-deposit rate gap get bigger and the Number of stores grows. The wholesale funding ratio is analyzed to have no statistically significant effect on the profitability of banks. Rather than being influenced by macroeconomic indicators, it is indicated that the situation of individual banks and other financial environments have been affected. And banks increase profitability as banks increase their loan after the financial crisis. The empirical analysis shows that profitability factors have periodical distinctions, and in this aspect, this research has implications. The study needs to be expanded to cover the entire domestic banking sector, in consideration of the profitability of the banking industry in the future.