• East Asian Economic Review
• /
• 제28권3호
• /
• pp.277-314
• /
• 2024

This study analyzes the response of economic fundamentals to a misalignment shock of the real effective exchange rate in Korea. The estimation results of the equilibrium exchange rate determination model and time series model show that there is no significant difference in the direction of the deviation from equilibrium and that the won is significantly undervalued during the period before 1988, or during the currency and global financial crises. The cumulative impulse response analysis of the VAR model over the full period shows that an upward shock to the deviation from the equilibrium exchange rate reduces the GDP gap and inflation rate, while the effect on the call rate is not statistically significant. Furthermore, an upward misalignment shock initially worsens the goods and services balance, but the deficit in the goods and services balance shrinks significantly over time. In rolling regressions analysis, the entire sample is divided into two periods to estimate the impulse response function from the first period, and then the same procedure is repeated by moving the sample forward one by one. The cumulative impulse response results show that, as is the case for the full period, a positive exchange rate misalignment shock initially reduces the GDP gap, inflation, and worsens the goods and services balance, but the impact of this upward shock on these variables becomes increasingly weaker in the more recent sample. It also shows that the negative impact of upward shocks on the current account is smoothed out more recently during periods of undervaluation than during periods of overvaluation.

• 선박안전
• /
• 통권25호
• /
• pp.64-76
• /
• 2008

This paper describes the failure mechanism and Charpy impact test of Fiber glass Reinforced Plastic composites which it was actually used for side plate of vessel. There are two examinations. The examination I, the specimens which it given temperature range $-25^{\circ}C$-$50^{\circ}C$ and with different initial notch length did impact test and then it compared impact energy(Uc) and impact fracture toughness(GIC). The examination II, the specimens which it putted into fresh water and sea water for scheduled hours did impact test and it compared impact energy(Uc) and impact fracture toughness(GIC). From examination I, it showed that impact energy(Uc) and impact fracture toughness(GIC) were peak at ambient temperature and decrease as temperature reduced. Fracture toughness(GIC) showed increase as initial notch length reduced. From examination II, impact energy(Uc) and impact fracture toughness(GIC) tended to increase which specimens putted in fresh water compared with sea water and maximum tolerance rate tend to decrease as permeation hours will be long.

• 한국콘텐츠학회논문지
• /
• 제15권1호
• /
• pp.276-285
• /
• 2015

이 연구의 목적은 우리나라의 지역사회 건강관련 삶의 질에 영향을 미치는 지역사회 요인을 확인하기 위함이다. 2012년 단면연구이며, 국가통계포털의 209개의 시군구별 2차 자료를 사용하였다. 기본 틀은 International Council of Science(ICSU)에서 제시한 지역사회 건강결정요인을 바탕으로 구성하였고, 6가지 측면으로 분류하였다. 분석방법은 지역사회 EQ-5D지수와 지역사회 요인들에 다변량 회귀분석을 실시하였다. 분석결과로, 흡연율, "양호한" 주관적 건강수준 인식률, 상수 및 하수도 보급률 그리고 재정자립도가 EQ-5D에 통계적으로 유의하게 긍정적인 연관성이 있었다. 순인구이동률, 비만율, 필요서비스 미치료율 그리고 지역사회 유형이 EQ-5D에 통계적으로 유의하게 부정적인 연관성이 있었다. 이 연구는 지역사회 수준의 건강관련 삶의 질에 영향을 미치는 지역사회 요인들의 연관성을 확인했으며, 이것은 지역사회 건강 정책 개발에 유용한 증거를 제공할 수 있다.

• Journal of Gastric Cancer
• /
• 제22권4호
• /
• pp.264-272
• /
• 2022

Purpose: The coronavirus disease 2019 (COVID-19) pandemic has significantly disrupted cancer screening services worldwide. We aimed to measure the impact of COVID-19 on gastric cancer screening rates based on age, sex, household income, and residential area. Materials and Methods: We analyzed data from the Korean National Cancer Screening Survey from 2017 to 2021 for adults aged 40-74 years. We evaluated the gastric cancer screening rate within two years in accordance with the National Cancer Screening Program protocol recommendations and that within the previous year. We compared the trends in the pre- and post-COVID-19 outbreak periods. Results: Before the COVID-19 outbreak, there was little change in the gastric cancer screening rates until 2019. After the COVID-19 outbreak, the screening rate as per recommendation decreased from 70.8% in 2019 to 68.9% in 2020 and that for one year decreased from 32.7% in 2019 to 27.2% in 2020. However, as the COVID-19 pandemic continued after 2020, both gastric cancer screening rates as per recommendations and for one year rebounded. Although a similar trend was observed for the upper endoscopy screening rate, the upper gastrointestinal series screening rate decreased from 7.8% in 2020 to 3.1% in 2021. During the pandemic, the screening rate decreased among younger adults (40-49), those residing in metropolitan regions, and those with high incomes. Conclusions: Despite a decline in gastric cancer screening rate during the COVID-19 pandemic, the rate surged in 2021. Further studies are needed to estimate the impact of cancer screening delays on future cancer-related mortalities.

• 한국항공운항학회지
• /
• 제18권4호
• /
• pp.67-72
• /
• 2010

In this study, performance analysis and design optimization is carried out for a multi-rate spring brake system, which is used in a cable ride to stop the arriving passengers in safe and comfortable manner. Mathematical model for the spring is developed toward the objective of minimizing the impact at the arrival while satisfying the constraint of limited distance at the stop. Matlab code is utilized to examine parameters affecting the performance of the brake system. The results are validated by a commercial software RecurDyn. Kriging meta model is used to reduce the computational cost of the analysis. Optimization is conducted by RecurDyn, from which the design parameters are determined that minimizes the impact at the stop.

• 한국주조공학회지
• /
• 제11권1호
• /
• pp.63-70
• /
• 1991

Aluminium alloy castings, which can be not only manufactured in larger geometrically complex shapes, but also show good mechanical properties in addition to light weight, have kept their potential use as structures in the field of automotives, industrial machines and aircrafts. The variations of eutectic Si size a great effect on the elongation, impact value, fracture toughness and fatigue crack propagation rate without changes in the tensile strength or yield strength. The cooling curves with the solidification rate between $1.4^{\circ}C\;/min$ and $19.1^{\circ}C\;/min$ were obtained. With the increase of solidification rate, DAS, eutectic Si size and grain size were all decreased, which enhanced the mechanical properties. The tensile strength and yield strength were the most greatly influenced by DAS, and the elongation and impact value by eutectic Si size.

• 환경영향평가
• /
• 제14권1호
• /
• pp.17-24
• /
• 2005

This study was performed to evaluate the adsorption rate of phosphate corrosion inhibitor and reaction rate constant in drinking water distribution systems. The optimum concentration of corrosion inhibitor would vary depending on the quality of water, pipe materials, and condition of metal surfaces. The current adsorption study indicated that the residual phosphate concentration of the corrosion inhibitor decreased with the time as it adsorbed on the surface of pipe material. As time went by, the residual phosphate concentration became constant. It means that the formation of the corrosion protection film on metal surfaces is completed.

• 한국음향학회지
• /
• 제42권6호
• /
• pp.565-571
• /
• 2023

사후확인제 도입으로 현장에서의 바닥충격음 성능 측정이 의무화되고, 평가 방법이 변경되었다. 제도 변화에 따른 바닥충격음 성능 변화를 추적하기 위해서는 변경된 평가방법에 따라 중량충격음 특성이 어떻게 나타나는지에 대한 연구가 필요하다. 본 연구에서는 평면과 바닥구조가 동일한 하나의 아파트 건물에 위치한 59세대를 대상으로 충격원 및 평가지표에 따라 단일수치평가량을 결정하는 주파수 대역의 기여율을 분석하였다. 단일수치평가량에 따른 주파수대역별 기여도 산출방법이 상이하여 단순 비교는 어려우나, 사후확인제 도입 이전 평가방법(뱅머신 측정 및 L'_i,Fmax,AW으로 평가)에서는 63 Hz가 미치는 기여율은 평균 80.8 %로 나타났으며, 125 Hz가 미치는 기여율은 평균 19.2 %으로 나타났다. 현행 평가방법(고무공 측정 및 L'_iA,Fmax으로 평가) 에서는 기여율은 50 Hz ~ 80 Hz에서 평균 33.1 %, 100 Hz ~ 160 Hz에서 평균 58.7 %, 200 Hz ~ 315 Hz에서 평균 6.9 %, 400 Hz ~ 630 Hz에서 평균 1.3 %으로, 63 Hz 대역의 기여도가 낮아진 것으로 나타났다. 이 결과는 대상 공동주택에 대한 사례 분석 내용으로, 더 다양한 공동주택에 대한 측정 데이터를 분석할 필요가 있다.

• The Journal of Asian Finance, Economics and Business
• /
• 제7권12호
• /
• pp.85-93
• /
• 2020

This study aimed to explore the impact of macroeconomic (Real GDP growth (GDPG), Inflation rate (INF)) and bank -specific variables (profitability (ROA), capital adequacy (CADEQ), non-performing loans (NPL), deposit growth (DEPG)) on the liquidity (lIQ) of 13 listed Jordanian commercial banks for the period 2011-2018. Panel data analysis, Pooled least square, fixed effects model and random effects model, Lagrange multiplier test, and Hausman test were used. The random effects model output shows that, macroeconomic variables have a significant impact on Jordanian commercial banks liquidity since inflation has a positive impact while GDPG has a negative impact on banks (LIQ). On the other hand among the bank-specific variables capital adequacy and deposit growth have a positive significant impact on banks (LIQ), while (NPL) and (SIZE) have a negative significant impact on Jordanian commercial banks liquidity. But ROA has a negative insignificant impact on (LIQ). The findings of the study suggest that commercial banks departments need to pay attention to the economic and internal variables of banks in order to maintain acceptable levels of liquidity.

• 한국생산제조학회지
• /
• 제21권4호
• /
• pp.639-643
• /
• 2012

The hip protector has been developed using the air-bag which has the capability of attenuating an impact. The impact force using the PVC air-bag was decreased by values of 27.5% on average, compared to the impact force without the air-bag. In the experiment, the standard deviation of the impact force attenuation rate was 0.78%. It means that the dimensions of the air-bag have no significant effects to reduce the impact. We believe that it is possible to design light and cheap hip protectors with air-bag to prevent the femur fracture.