김준성 교수

This study aimed to investigate the effectiveness of near-infrared spectroscopy (NIRS) monitoring for the early detection of limb ischemia in patients who were placed on veno-arterial extracorporeal membrane oxygenation (VA-ECMO) via femoral artery. We prospectively used NIRS monitoring for the early detection of limb ischemia in 28 adult patients, who were supported with peripheral VA-ECMO between August 2013 and August 2014 (NIRS group). A decision to perform distal perfusion catheterization w

Well-designed scaffolds provide appropriate niches that can effectively recruit host cells and induce differentiation of recruited cells into the desired cell types, facilitating in situ tissue regeneration. Here we report a tissue-specific extracellular matrix (ECM) hydrogel composed of adipose-derived soluble ECM (sECM) and methylcellulose (MC) as a cell-free scaffold system for adipose tissue regeneration. The sECM-MC hydrogels showed a thermosensitive sol-gel phase transition and rapidly for

Using province-level establishments and employment data from the Korean Employment Insurance Database, this paper investigates how the regional spread of COVID-19 affects local businesses and unemployment by establishment size and industry. We find that the number of small establishments declines substantially after the COVID-19 pandemic through a decrease in new establishment creation and a surge in establishment closures. By contrast, large establishments are not affected significantly. Examin

Soloassist II can reduce the participation of a human assistant during surgery and is not inferior to human assistance in laparoscopic-assisted colon cancer surgery. Thus, it is a feasible instrument in laparoscopic-assisted colon cancer surgery that can provide positive short-term outcomes.

The Cox-maze IV procedure using RFBP2 and cryothermy is quite safe and freedom from atrial fibrillation at postoperative 6 month was 82.5%. Risk factors for failure or recurrence of atrial fibrillation after Cox-maze IV were old age and preoperative over moderate tricuspid regurgitation.

Purpose: To evaluate the change in blink rate in adolescents according to the type and duration of computer tasks and to analyze the risk of ocular dryness using an ocular protection index. Methods: Fifteen male high school students played computer games and viewed Internet lectures for 20 minutes each. Blink rate was measured by USB camera, and ocular protection index (OPI, the ratio of BUT to inter-blink interval) was calculated for each subject during the two tasks. In addition, 7 of the 15 s

We investigate whether real exchange rate fluctuations contribute to the fluctuations in housing prices differently across local housing markets through the differential compositions of immigrants. We first develop a new measure of the immigrant-weighted local real exchange rate, which varies across areas and over time within Australia. Using this measure and a fixed-effect instrumental variables approach, we find that the growth in local real exchange rate positively affects housing price growt

문】선점preemption은 인과관계를 반사실적 의존관계로 해명하는 반사실인과이론에 대한 문제로서 제기되었다. 최근에 선점은 인과관계를 확률의 관계로 해명하는 확률인과이론에 대한 문제로서 다시 부각되었다. 문제의 핵심은, 확률의 관계가 인과관계를 해명하는 데 필요하지도 충분하지도 않다는 것이다. 이 문제에 대해 필자는 다음을 논의한다. 첫째, 선점의 문제는 확률인과이론의 반례가 아니라 사건 수준의 인과관계를 위한 확률인과이론의 필요성을 보여주는 것이다. 필자는 두 가지 서로 다른 인과관계의 개념으로 이 필요성을 입증한다. 둘째, 사건 수준의 새로운 확률인과이론으로서 엘스Eells(1998, 2002)의 확률궤적이론과 선점 현상에 대한 이 이론의 해명을 소개한다. 셋째, 셰퍼Schaffer(2001)가 제시한 새로운 유형의 선점의 문제와 이 문제를 해결하는 셰퍼의 두 가지 분석을 소개하고, 확률궤적이론이 그 문제를 어떻게 분석할 수 있는지 보여준다. 넷째, 보다 복잡한 선점의 현상에서

With MDCT imaging, well-educated surgeons could be accurate in three fourths of cases. There was room for improvement through experience. Considering the substantial possibility of inaccuracy, critical decisions on CT images should be made through thorough reviewing by as many experienced radiologists and surgeons as possible.

This paper investigates returns to women’s education by applying an optimal IV selection approach, post-Lasso IV estimation, which improves the first-stage predictive relationship between an endogenous regressor and instruments. Using the 2010 American Community Survey, we find that an extra year of education increases married women’s own income by $4,480 and spouse income by $8,822. Our findings indicate that 53% of the increase in women’s consumption by education is attributed to the marriage

This paper studies how the strength of social ties is affected by the geographical location of other individuals and their social capital. We characterize the equilibrium in terms of both social interactions and social capital. We show that lower travel costs increase not only the interaction frequency but also the social capital for all agents. We also show that the equilibrium frequency of interactions is lower than the efficient one. Using a unique geocoded data set of friendship networks amo

본 연구는 공공기관 지방 이전과 혁신도시 조성이 지역의 경제성장 및 산업구조 변화에 미치는 영향을 실증적으로 분석하였다. 2007년부터 2019년까지 13년의 전국 시･군･구 데이터를 활용하여 혁신도시 조성 지역과 나머지 지역 간의 DID 분석을 시행하였다. 분석 결과 지역내총생산(GRDP), 노동자 수, 창업기업 수 측면에서 지역 경제성장에는 유의미한 효과가 있음을 확인할 수 있었다, 하지만 광업･제조업 노동생산성과 집적경제의 외부성을 유발하는 산업의 특화, 다양성, 경쟁도 측면의 지역 산업구조 변화에는 유의미한 효과가 없었던 것으로 확인되었다. 이는 공공기관 이전과 혁신도시 조성 정책이 공공기관 이전과 외형적 성장이라는 정책 산출 측면의 주요 단계를 완료 하였지만, 혁신도시 조성이 목표로 한 지역의 성장 거점화에는 아직 도달하지 못한 것을 시사한다.