• 융합경영연구
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• 제12권2호
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• pp.61-71
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• 2024

Purpose: This study explores the impact of discrimination experience on stress levels among Seoul's public housing complex residents, emphasizing the moderating role of social capital. Research design, data and methodology: Utilizing the 2019 Seoul public housing (PH) panel data and an ordered logit model, the research categorizes residents based on personal and environmental factors, contrasting them across different local housing price levels. Results: We find that public housing residents' experience of discrimination has a significant impact on stress, and local housing prices are positively related to stress. Interestingly, stress due to discrimination is more pronounced in high-priced neighborhoods, which are associated with real estate inequality. Conversely, this impact is less pronounced in lower-priced neighborhoods. Importantly, social capital not only has a significant moderating effect on stress for all residents, but in high-priced neighborhoods, it also moderates the stress caused by experiences of discrimination for social housing residents. Conclusions: These findings highlight the need for policy interventions to strengthen social capital and address socioeconomic disparities in public housing, and are significant for analyzing the nuanced relationship between neighborhood, housing affordability, discrimination, and stress in urban communities for public housing residents, which is a socially problematic issue.

• 한국산업보건학회지
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• 제32권1호
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• pp.10-20
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• 2022

Objectives: The aim of this study is to evaluate exposure levels of the extremely low frequency magnetic fields(ELF-MF) radiated from various electric facilities in Liquid Crystal Display(LCD) manufacturing processes. Methods: This study measured the exposure levels of personal and local ELF-MF for the electronic facilities installed in two LCD manufacturing companies. Samplers were installed around workers' waist during working hours to identify personal exposure levels, and direct reading equipment were located at 3 cm, 10 cm, and 30 cm away from the surface of the electronic facilities to measure local exposure levels. Average and maximum(ceiling) values were calculated for personal and local exposure levels. Results: Average and maximum of personal exposure levels for each worker were 0.56(mean) ± 0.02(SE) µT and 6.31 ± 0.75 µT, respectively. Statistical analyses of the study found that maximum of the personal exposure levels for engineers was significantly higher than that for operators since engineers spend more time near the electronic facilities for repairing. The range of maximum personal exposure levels was 0.50 ~ 43.50 µT and its highest level was equivalent to 4.35 % of ACGIH(American Conference of Governmental Industrial Hygienists) exposure limit value(1 mT). Maximum of local exposure levels was 8.18 ± 0.52 µT and the electronic facilities with higher exposure levels were roof rail and electric panel, which were not related to direct manufacturing. The range of maximum local exposure levels was 0.60 ~ 287.20 µT and its highest level was equivalent to 28.7 % of the ACGIH exposure limit value. Lastly, the local exposure levels significantly decreased as the measurement distance from the electronic facilities increased. Conclusions: Maximum of personal and local exposure levels did not exceed the exposure limit value of ACGIH. However, it is recommended to keep the workers as far as possible from the sources of ELF-MF.

• 디지털융복합연구
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• 제17권11호
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• pp.1-7
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• 2019

본 연구는 1995년부터 2017년까지의 16개 지방자치단체 지역별 패널통계를 활용하여 노동력 고령화가 노동 생산성에 미치는 영향을 분석하였다. 지역별 고정효과와 다양한 조정변수들을 고려한 패널회귀분석 결과에서 총취업자 중 60세 이상의 취업자 비중으로 정의한 노동력 고령화는 노동 생산성에 매우 일관되고 유의한 음(-)의 효과를 주며, 부정적인 효과의 크기는 노동력 고령화가 1% 증가할 때마다 노동 생산성이 약 0.14 ~ 0.20% 감소하는 것으로 나타났다. 이밖에 조정변수로 고려된 1인당 자본스톡과 인적자본은 노동 생산성이 증가하는데 많은 기여를 하고, 경기변동의 대리변수인 실업률은 예상과 같이 노동 생산성에 유의한 음(-)의 효과를 미치며, 비록 유의하지는 않지만, 전체 산업 중 서비스업의 비중을 의미하는 산업구조의 계수가 양(+)의 값을 보이지만 유의하지 않은 것으로 확인되었다. 본 연구의 결과를 통해 노동력 고령화로 예상되는 노동 생산성의 감소를 억제하기 위해 인적자본을 유지 및 확충할 수 있는 경제 및 교육정책의 설계와 구축이 필요하다는 시사점을 도출할 수 있다.

• Journal of Korea Trade
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• 제26권6호
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• pp.1-19
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• 2022

Purpose - This study empirically investigates the effects of Official Development Assistance (ODA) on the economic activities of private actors in recipient countries. As a proxy for the economic activities of private actors, we utilize the job creation activities of foreign subsidiaries in recipient countries. The foreign subsidiaries provide a foundation for economic development by creating paying jobs. That is, if ODA has been successfully transferred to foreign subsidiaries, then these foreign subsidiaries should help economic growth and help create a boom in the local market by providing jobs. These jobs eventually lead to the achievement of the primary aims of foreign aid, including poverty reduction. Thus, this study empirically examines the relationship between ODA and the number of jobs created by foreign subsidiaries in recipient countries. Design/methodology - This is the first study to examine the effects of the ODA on the job creation of foreign subsidiaries because it has been hard to obtain internal information related to the employment status of foreign subsidiaries. Fortunately, we have a unique panel dataset provided by the Export-Import Bank of Korea (KEXIM) for 2006 to 2013. In terms of the empirical specification, we use the generalized least squares (GLS) method. The panel GLS estimator allows us to have an efficient estimation that overcomes the limitations of the panel data. It employs assumptions about the heteroscedasticity between the panels and makes an autocorrelation of the error term within each panel. Findings - We find that ODA influences job creation in foreign subsidiaries. In particular, we found that ODA creates more jobs in sales than in managerial or production positions. This study also shows that the effect of the ODA on the foreign subsidiaries' job creation activities depend on the purpose of the ODA. By examining ODA effects on the foreign subsidiaries' economic activities (e.g., job creation), this study fills a gap in the current literature. Originality/value - Existing studies that focus on the ODA effect have either a macroeconomic point or a microeconomic point of view. However, both approaches do not explain how well foreign aid has influenced private economic actors of recipient countries. In essence, previous researchers found it difficult to obtain the necessary data for internal employment status from foreign subsidiaries. However, thanks to the Korea Export-Import Bank, this study shows that ODA indeed influences the job creation activities of foreign subsidiaries even after controlling for other factors such as FDI, GDP growth rate, employment rate, household expenditure, mother firms' share, etc. By doing so, we can examine how ODA influences the job creation of foreign subsidiaries, which might help economic development and reduce the amount of poverty in recipient countries.

• Nuclear Engineering and Technology
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• 제52권2호
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• pp.417-428
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• 2020

Investigations of the commercial aircraft impact effect on nuclear island infrastructures have been drawing extensive attention, and this paper aims to perform the safety assessment of Generation III nuclear power plant (NPP) buildings subjected to typical commercial aircrafts crash. At present Part III, the local damage of the rigid components of aircraft, e.g., engine and landing gear, impacting the steel concrete (SC) structures of NPP containment is mainly discussed. Two typical SC target panels with the thicknesses of 40 mm and 100 mm, as well as the steel cylindrical projectile with a mass of 2.15 kg and a diameter of 80 mm are fabricated. By using a large-caliber air gas gun, both the projectile penetration and perforation test are conducted, in which the striking velocities were ranged from 96 m/s to 157 m/s. The bulging velocity and the maximal deflection of rear steel plate, as well as penetration depth of projectile are derived, and the local deformation and failure modes of SC panels are assessed experimentally. Then, the commercial finite element program LS-DYNA is utilized to perform the numerical simulations, by comparisons with the experimental and simulated projectile impact process and SC panel damage, the numerical algorithm, constitutive models and the corresponding parameters are verified. The present work can provide helpful references for the evaluation of the local impact resistance of NPP buildings against the aircraft engine.

• 국제지역연구
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• 제14권3호
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• pp.157-177
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• 2010

본 연구는 중국의 1985년부터 2008년까지의 각 성 시에 관한 패널데이터를 활용해서 재정분권화가 경제성장에 미치는 영향을 실증분석한다. 재정분권화를 위해 최근에 개발된 지표를 사용하고 지방정부의 자율재량권을 계량화해서 모형에 반영하여 다음의 결론을 얻는다. 인플레이션율의 증가는 중국경제에 긍정적인 영향을 미치는 것으로 나타났는데 이는 필립스커브에 의하면 고용량의 증가로 대변되는 중국경제성장과 상충되는 개념으로서 향후 중국경제의 불안정성을 암시하고 있다. 중국의 WTO가입은 중국경제에 긍정적인 역할을 해온 것으로 나타났는데 이는 고전학파의 자유무역이론을 뒷받침하는 실증결과로 해석할 수 있다. 지출분권화는 중국경제성장에 긍정적인 영향을 미치고, 또한 세입분권화도 지출분권화만큼 크지는 않지만 경제성장에 긍정적인 영향을 끼쳤다. 국세나 지방세를 많이 부과하면 경제성장에 부정적인 영향을 미치는 것으로 나타났고, 기대와는 달리 지방정부의 자율재량권을 계량화해서 반영한 지표는 경제성장과 관련이 없는 것으로 나타났다.

• 한국유통학회지:유통연구
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• 제16권5호
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• pp.193-209
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• 2011

SSM(Super Supermarket) 출점이 사회적 논쟁이 되고 있고 출점을 저지하기 위한 다양한 규제가 마련되고 있는 중이다. 그러나 SSM 규제의 핵심이 진입제한에 있는바 경쟁 정책적 관점에서 그 타당성을 인정받기는 쉽지 않다. 그렇다면 적어도 보다 거시적 관점 즉 경쟁정책의 범위를 벗어나 사회적 정치적 목적에서 그 타당성을 인정받을 필요가 있을 것이다. 여기서 사회적 정치적 목적의 달성 여부는 '국민경제적 차원'에서 볼 때 규제 타당성이 성립할수 있는 지를 살펴보는 것을 의미한다. 본 논문은 국민경제적 차원을 지역상권의 활성화 차원으로 파악하고 SSM의 출점이 경쟁 소매업체에 대해 미치는 영향이 아닌 지역 상권에 대해 미치는 영향을 파악하는 것으로 연구 목표를 설정하였다. 아울러 본 연구는 이해당사자를 대상으로 한 설문 중심의 연구방법을 활용한 과거 연구의 약점을 일부라도 회피하고자 보다 객관적인 접근을 시도한다. 구체적으로 본 연구에서는 SSM 상권의 범위인 출점 반경 500m 이내에 위치한 편의점 매출액을 해당상권의 활성화 정도의 지표로 사용하고 이에 대한 업종별 점포비율의 변화, SSM의 출점 여부, 그리고 소매판매지수의 영향력을 평가하고자 한다. 이를 위해 편의점 매출액, 업종별 점포비율, 소매판매지수로 구성된 패널자료를 바탕으로 Swamy(1970)의 확률계수모델을 이용하였다. 그 결과 SSM(기업형 슈퍼마켓)의 출점 여부와 상관없이 편의점의 매출액이 증가하거나 감소하고 있기 때문에 SSM의 영향이 미비하거나 없는 것으로 나타났다. 편의점 매출액의 변화에 영향을 주는 많은 변수 중에서 소매업과 음식업의 경우 소매업 비율은 부의 관계를, 음식업 비율은 정의 관계를 나타났다. 이러한 결과는 소매업의 비율이 감소한다고 해서 상권 전체의 침체를 가져오는 것이 아니라는 주장을 지지하는 것으로 보인다.

• Journal of Ship and Ocean Technology
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• 제11권3호
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• pp.39-50
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• 2007

This study aims the observation of wing-in-ground effect near free surface. Numerical computations are carried out to observe the deformation of free surface and the effects on lift and drag. The detailed flow fields around two- and three-dimensional wings with NACA 0012 section are observed from the results of a commercial CFD program, FLUENT, and the local deformations of free surface are obtained by applying a Rankine panel method. In the present cases, the small deformation of free surface under the wings is observed, but different forces are found between solid wall and free surface when the speed of wings becomes large.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.612-616
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• 2007

This paper describes a procedure to improve road noise using DPDS estimation. We can estimate a body local stiffness at chassis mounting point where the path of road input vibration by DPDS with experiment and FE simulation. DPDS result from FE model has a good correlation with experiment data. FE model DPDS shows weak points among chassis mounting points. Body panel thickness and shape were changed to meet DPDS target. Improved DPDS of critical points makes a road noise level lower.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 D
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• pp.1997-1998
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• 2006

In this paper, we propose a remote control system which is used by internet network system in the small water booster supply. So far, TMTC(Tele Metering Tele Control) has been used to control and monitor small water booster pump. But it is possible and easy to control and observe local booster panel with the rapid development of internet, This new system is to provide operators and managers with sufficient information and control in order to implement the operation in an efficient and economical way. This system consists of three parts that are controller, netpump server and netview client. Controller has a dual architecture. The motive for installing controller is the continuous production and supply of drinking water.