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조상현,Youngs Chang,Yoon Kim 대한예방의학회 2019 Journal of Preventive Medicine and Public Health Vol.52 No.1
Objectives: The aim of this study was to investigate cancer patients’ utilization of tertiary hospitals in Seoul before and after the benefit expansion policy implemented in 2013. Methods: This was a before-and-after study using claims data of the Korean National Health Insurance Service from 2011 to 2016. The unit of analysis was inpatient episodes, and inpatient episodes involving a malignant neoplasm (International Classification of Diseases, Tenth Revision codes: C00-C97) were included in this study. The total sample (n=5 565 076) was divided into incident cases and prevalent cases according to medical use due to cancer in prior years. The tertiary hospitals in Seoul were divided into two groups (the five largest hospitals and the other tertiary hospitals in Seoul). Results: The proportions of the incident and prevalent episodes occurring in tertiary hospitals in Seoul were 34.9% and 37.2%, respectively, of which more than 70% occurred in the five largest hospitals in Seoul. Utilization of tertiary hospitals in Seoul was higher for inpatient episodes involving cancer surgery, patients with a higher income, patients living in areas close to Seoul, and patients living in areas without a metropolitan city. The utilization of the five largest hospitals increased by 2 percentage points after the policy went into effect. Conclusions: The utilization of tertiary hospitals in Seoul was concentrated among the five largest hospitals. Future research is necessary to identify the consequences of this utilization pattern.
앵커와 마찰의 영향을 고려한 교량상 급속경화궤도의 궤도-교량 상호작용해석
조상현,이일화,정원석,이희영,이경찬 한국전산구조공학회 2018 한국전산구조공학회논문집 Vol.31 No.1
Ballast track requires constant maintenance work due to progress of track irregularity. Fast Hardening Track(FHT) has been developed to reduce the maintenance effort done by injecting fast hardening mortar in aged ballast to convert slab track . For the application of FHT to a railway bridge, post-installed anchors should be placed at center of the track segment to fix it on bridge. This paper presents track-bridge interaction analysis results with FHT considering stiffness and strength of post-installed anchor, age of FHT concrete and friction between FHT and bridge deck surface. Based on the analysis results, this study suggests when is good to install the anchors and allow normal operation of passing train. 자갈 궤도는 부설 후 궤도틀림이 발생하여 지속적인 유지·보수 작업이 필요하다. 이를 개선하기 위하여 기존의 자갈 궤도에 급속경화 모르타르를 주입하여 단시간 내에 콘크리트 궤도로 치환할 수 있는 급속경화궤도가 개발되었다. 교량에 부설되는 급속경화궤도는 교량과 궤도의 거동을 일치시키기 위하여 후설치 앵커를 궤도 세그먼트 중앙부에 시공한다. 본 논문은 앵커로 교량과 연결된 급속경화궤도와 교량의 궤도-교량 상호작용 해석을 수행하여 레일 및 앵커의 안전성을 검토하였다. 이때 앵커의 강성 및 강도, 급속경화 콘크리트의 재령, 급속경화궤도와 교량 사이의 마찰을 고려하였다. 이를 바탕으로 급속경화궤도 부설 후 적절한 앵커의 설치시기 및 열차 정상운행 가능시기를 검토하였다.
이대용 장군 일기와 한국현대사 : 일기에 나타난 주요 사건을 중심으로
조상현 순천대학교 인문학술원 2022 인문학술 Vol.9 No.-
General Lee Dae-yong spent his entire life as a soldier. During the Korean War, he fought 110 battles and left a record of never losing a single battle. At the height of the Vietnam War, he was dispatched to the Korean embassy in Vietnam as the Economic Affairs Officer. When Vietnam was defeated by the communists, he sacrificed himself for the safe evacuation of Koreans. He had several chances to escape, but he gave up on it for the safety of the residents. He was detained by the Communist Party of Vietnam and sentenced to five years in prison. This is the reason why he is revered as a sacrificial saint and a model of the spirit of sacrifice. He was a righteous soldier who avoided injustice, did not compromise with injustice, and always wanted to walk the right path. This study revealed that he was a great soldier and citizen who gave his life for what was right to uncover the historical truth. The diary left by General Lee Dae-yong contains modern historical values. The contents of the situation at the time enhance the political and historical value. He records every move and every move of an individual, so you can know his life at the time. Diaries are also valuable as life history research materials. The diary containing the insights of General Lee Daeyong, who has spent his whole life as a soldier, has high military value. 이대용 장군은 평생 군인의 삶을 살았다. 그는 6·25전쟁시, 110회의전투를 치루면서 단 한 번도 패하지 않는 진기록을 남겼다. 베트남 전쟁이 한창이던 시기 베트남 주재 한국대사관 경제공사로 파견되었다. 공산세력에 의해 베트남이 패망하자, 그는 교민들의 안전한 철수를 위해 자신을 희생했다. 그는 몇 번이고 탈출할 수 있는 기회가 있었지만, 교민들의안전을 위해 이를 포기했다. 그는 베트남 공산당국에 억류되어 5년 동안옥고를 치렀다. 그가 살신성인과 희생정신의 표본으로 알려진 이유다. 그는 부정을 멀리하고 불의와 타협하지 않았으며 언제나 바른길을 걷고자했던 정의로운 군인이었다. 이번 연구는 이대용 장군의 일기를 통해 그의 행적을 되돌아보고, 일기에서 언급된몇 가지 사건에 대한 분석을 통해 한국현대사에서 이대용 장군의 일기가 갖는 가치를탐구하는 것이다. 이대용 장군이 남긴 일기는 현대사적 가치가 내포되어 있다. 당시 상황이 담긴 내용들은 정치사적 가치를 높여 준다. 개인의 일거수일투족을 낱낱이 기록해서 당시 생활상을 알 수 있다. 일기는 생활사 연구 자료로서의 가치도 있다. 평생을 군인으로살아온 이대용 장군의 식견이 담겨 있는 일기는 군사학적 가치 또한 상당하다.
Cardiovascular Protective Effects and Clinical Applications of Resveratrol
조상현,남궁경,신민지,박주은,양은영,임진수,부티투,김형규,한진 한국식품영양과학회 2017 Journal of medicinal food Vol.20 No.4
Resveratrol is a naturally occurring phenol that is generated by plant species following injury or attack by bacterial and fungal pathogens. This compound was first described as the French Paradox in 1992. Later in 2003, resveratrol was reported to activate sirtuins in yeast cells. Recent experimental studies have found that resveratrol offers a variety of benefits that include both anticarcinogenic and anti-inflammatory effects in addition to the ability to reverse obesity, attenuate hyperglycemia and hyperinsulinemia, protect heart and endothelial function, and increase the life span. Multiple molecular targets are associated with the cardioprotective capabilities of resveratrol, and therefore, resveratrol has potential for a wide range of new therapeutic strategies for atherosclerosis, ischemia/reperfusion, metabolic syndrome, cardiac failure, and inflammatory alterations during aging. Expectations for application in human patients, however, suffer from a lack of sufficient clinical evidence in support of these beneficial effects. This article reviews recently reported basic research results that describe the beneficial effects of resveratrol in an attempt to condense the evidence observed in clinical trials and provide support for the future development of novel clinical therapeutics in patients with cardiovascular diseases.
HOLDER ESTIMATES FOR THE CAUCHY-RIEMANN EQUATION ON PARAMETERS
조상현 대한수학회 2011 대한수학회지 Vol.48 No.2
Let <수식> be a family of strictly convex domains in C^n. We obtain explicit estimates for the solution of the ∂-equation on Ω × I in Holder space. We also obtain explicit point-wise derivative estimates for the ∂-equation both in space and parameter variables.