An Overview of Myocardial Bridging With a Focus on Multidetector CT Coronary Angiographic Findings

고성민 대한심장학회 2008 Korean Circulation Journal Vol.38 No.11

Myocardial bridging (MB) is a common anatomical variant rather than a congenital anomaly, and it is usually considered benign. It is generally confined to the mid-portion of the left anterior descending coronary artery. Atherosclerotic plaques are often located in the segment proximal to the bridged segment, although the tunneled segment is typically spared. Conventional coronary angiography is the gold standard for detection, but it is invasive and may not be sensitive enough to detect a thin bridge. The prevalence of MB reported in multidetector CT (MDCT) coronary angiographic series has ranged from 3.5% to 30.5% in patients with chest pain or with suspected or known coronary artery disease. Today, MDCT coronary angiography is an alternative noninvasive imaging tool that allows for easy and accurate evaluation of MB. Myocardial bridging (MB) is a common anatomical variant rather than a congenital anomaly, and it is usually considered benign. It is generally confined to the mid-portion of the left anterior descending coronary artery. Atherosclerotic plaques are often located in the segment proximal to the bridged segment, although the tunneled segment is typically spared. Conventional coronary angiography is the gold standard for detection, but it is invasive and may not be sensitive enough to detect a thin bridge. The prevalence of MB reported in multidetector CT (MDCT) coronary angiographic series has ranged from 3.5% to 30.5% in patients with chest pain or with suspected or known coronary artery disease. Today, MDCT coronary angiography is an alternative noninvasive imaging tool that allows for easy and accurate evaluation of MB.

Scintigraphic Evaluation of Heterotopic Ossification

고성민,홍인수,성기준,이준하 대한핵의학회 1997 핵의학 분자영상 Vol.31 No.2

객체지향 언어 Java를 이용한 Multimedia Client / Server System Test-Bed 구현 ( Implementation of a Multimedia Client / Server System Test-Bed with Object Oriented Programming Language Java )

고성민,송영부,이기영 한국통신학회 1998 한국통신학회 학술대회논문집 Vol.17 No.3

국내 대학생의 진로개발역량에 관한 연구동향 분석: 국내 학술지 논문을 중심으로

고성민,박윤희 중앙대학교 Human Engagement Institute 2023 역량개발학습연구 Vol.18 No.3

본 연구의 목적은 국내 학술지에 발표된 대학생 대상의 진로개발역량에 관한 연구를 분석함으로써연구의 특징을 파악하고 향후 연구 방향 및 시사점을 제시하는 것이다. 이를 위해 연구 기간을 지정하지 않고 2023년 8월 기준에서 학술정보서비스(RISS)에서 ‘ 대학생’, ‘진로개발역량’ 또는 ‘경력개발역량’ 을 키워드로 사용하여 학술논문 총 25편을 최종 선정하여 분석하였다. 분석 결과를 요약하면 다음과같다. 첫째, 연구물 특성 분석 결과 대학생을 대상으로 한 진로개발역량에 관한 연구는 2002년부터 현재까지 꾸준히 발표됐으며, 2015년에 4편으로 가장 많은 논문이 발표되었다. 게재지별 분석 결과 교육관련 학회에 투고된 논문이 가장 많았다. 둘째, 연구대상은 4년제 대학생을 대상으로 한 연구가 가장많았다. 셋째, 연구주제는 진로개발역량과 관련 변인들의 관계를 밝혀 진로교육의 내실을 강화하는 연구가 가장 많았다. 넷째, 연구방법의 유형은 양적연구가 가장 많았으며 모두 횡단연구를 사용했다. 다섯째, 진로개발역량 측정에는 성희진과 나승일(2012)의 도구가 가장 많이 사용되었으며, 진로개발역량의 하위요인은 자기이해, 전공 및 직업지식, 진로결정 확신도, 의사결정 효능감, 관계활용 효능감, 구직기술이었다. 여섯째, 대학생의 진로개발역량은 종속변인으로 가장 많이 사용되었으며 주로 대학의 진로취업서비스경험, 경력탐색행동, 고용가능성, 전공만족도, 진로결정과 정(+)의 관계를 보였다. 이러한 연구 결과를 바탕으로 대학생의 진로개발역량 연구에 대한 시사점과 향후 연구방향을 제시하였다. 마지막으로 학술지에 작성된 주제어를 워드 클라우드 분석을 진행하였으며 연구주제인 진로개발역량, 대학생, 경력개발역량, 진로역량, 경력개발 등의 주제어가 빈출 횟수가 높았다. 이러한 연구 결과를 통해 앞으로 연구에 대한 제안과 시사점을 기술하였다 The purpose of this study was to analyze research trends on the career development competencies of college students in South Korea. A total of 25 papers were analyzed, selected from the Academic Information Service (RISS) using keywords 'undergraduate' or ‘college’ and 'career development competencies'. Key findings are as follows. First, studies on career development competencies of college students have been consistently published since 2002, peaking in 2015, primarily in education-related journals. Second, the majority of research subjects were 4-year college students. Third, most studies focused on enhancing career education by exploring the relationship between career development competencies and related variables. Fourth, in terms of research method, it was found that quantitative research conducted as cross-sectional studies were the most. Fifth, the measures of Heejin Sung and Seung-il Na(2012) were the mostly used to measure the career development competencies. In addition, the sub-factors were self-understanding, major and occupational knowledge, career decision certainty, decision-making efficacy, relationship utilization efficacy, and job search skills. Sixth, career development competencies of college students were most often used as a dependent variable and had a positive relationship with employment support service experience, career exploration behavior, employment possibility, major satisfaction, and career decision-making. Based on the research findings, several future research directions in the area of the career development competencies are provided.

수소충전소 입지 최적화를 활용한 수소연료자동차 시장수요예측

고성민,신정우 대한산업공학회 2020 대한산업공학회 추계학술대회논문집 Vol.2020 No.11

안정형 협심증 환자들에서 관상동맥 전산화단층촬영을 이용한 심근허혈의 평가

고성민 대한영상의학회 2020 대한영상의학회지 Vol.81 No.2

Assessment of myocardial ischemia in patients with stable angina is important in deciding whether to treat coronary artery disease and in predicting clinical outcome. The fractional flow reserve is a standard reference for the diagnosis of myocardial ischemia, but this procedure has limitations because of its invasiveness. Coronary computed tomography angiography (CCTA) is now an established tool in the anatomic diagnosis of coronary artery disease; however, there are limits to the diagnosis of hemodynamically important stenosis that causes myocardial ischemia. In order to address this problem, studies using quantification of coronary atherosclerotic plaques, myocardial perfusion, and noninvasive calculation of fractional flow reserve based on CCTA have been actively conducted and recognized for their diagnostic value. In this review, several imaging techniques of CCTA used to assess myocardial ischemia are described. 안정형 협심증 환자에서 관상동맥질환의 치료 여부를 결정하고 임상 결과를 예측하기 위해서는 심근허혈의 평가가 중요하다. 현재 심근허혈 진단의 표준검사법으로 분획혈류예비력검사법이 인정되나 침습적 검사라는 제한점이 있다. 또한, 관상동맥 전산화단층촬영은 형태적인 관상동맥질환 진단에 유용한 방법으로 정립되었지만, 혈역학적으로 유의한 협착에 의한 심근허혈 진단에는 한계가 있다. 최근 이러한 문제를 해결하고자 관상동맥 전산화단층촬영 영상을 기반으로 측정한 관상동맥 죽상경화판의 정량화, 심근관류, 그리고 심근 분획혈류예비력을 이용한 연구들이 진행되어 왔고, 그 진단적 가치를 점차 인정받고 있다. 본 종설에서는 심근허혈진단과 관련된 관상동맥 전산화단층촬영 혈관조영술의 여러 영상기법들에 대해서 알아보고자 한다.

Primary Surgical Closure Should Be Considered in Premature Neonates with Large Patent Ductus Arteriosus

고성민,윤영철,조광현,이양행,한일용,박경택,황윤호,전희재 대한흉부외과학회 2013 Journal of Chest Surgery (J Chest Surg) Vol.46 No.3

Background: Treatment for patent ductus arteriosus (PDA) in premature infants can consist of medical or surgical approaches. The appropriate therapeutic regimen remains contentious. This study evaluated the role of surgery in improving the survival of premature neonates weighing less than 1,500 g with PDA. Materials and Methods: From January 2008 to June 2011, 68 patients weighing less than 1,500 g with PDA were enrolled. The patients were divided into three groups: a group managed only by medical treatment (group I), a group requiring surgery after medical treatment (group II), and a group requiring primary surgical treatment (group III). Results: The rate of conversion to surgical methods due to failed medical treatment was 67.6% (25/37) in the patients with large PDA (≥2 mm in diameter). The number of patients who could be managed with medical treatment was nine which was only 20.5% (9/44) of the patients with large PDA. There was no surgery-related mortality. Group III displayed a statistically significantly low rate of development of bronchopulmonary dysplasia (BPD) (p=0.008). The mechanical ventilation time was significantly longer in group II (p=0.002). Conclusion: Medical treatment has a high failure rate in infants weighing less than 1,500 g with PDA exceeding 2.0 mm. Surgical closure following medical treatment requires a longer mechanical ventilation time and increases the incidence of BPD. Primary surgical closure of PDA exceeding 2.0 mm in the infants weighing less than 1,500 g should be considered to reduce mortality and long-term morbidity events including BPD.

The Diagnostic Accuracy of the 64-slice Multi-detector CT Coronary Angiography for the Assessment of Coronary Artery Stenosis in Symptomatic Patients

고성민,이정근,남창욱,김동훈 대한영상의학회 2008 대한영상의학회지 Vol.59 No.4

Purpose: We evaluated the diagnostic accuracy of a 64-slice multi-detector CT (MDCT) coronary angiography against a conventional coronary angiography (CCA) for the detection of significant stenosis (≥50% lumen diameter narrowing). Materials and Methods: Sixty-four patients underwent a MDCT and a subsequent CCA to evaluate the presence of atypical chest pain or suspected coronary artery disease (CAD). A MDCT angiography was performed using a 64-slice MDCT-scanner (Sensation 64, slice collimation 32×0.6 mm). The coronary artery segments were classified according to a 15-segment model. The sensitivity, specificity, and diagnostic accuracy of the 64-slice MDCT for the detection or exclusion of significant CAD were calculated on a per-segment and per-patient basis. Results: Fifty-nine of the 64 (92%) coronary CT angiograms were of diagnostic image quality with 93.5% (809 of 865) of the coronary segments assessable by CT angiography. One-hundred two (12.6%) segments showed significant stenosis by CCA. Stenosis of 50% or greater was detected by sensitivity, specificity, accuracy, positive predictive valve, and negative predictive value on a per segment basis (89%, 99%, 97%, 90%, and 98%, respectively) and a per-patient basis (96%, 69%, 90%, 92%, and 82%, respectively). Conclusion: The 64-slice MDCT coronary angiography demonstrated a high diagnostic accuracy for both the per-segment and per-patient analyses for this symptomatic patient group.

유기금속분해 법에 의한 ITO 박막의 제조 및 특성

고성민,이병수,Go, Seong-Min,Lee, Byeong-Su 한국재료학회 1995 한국재료학회지 Vol.5 No.8

유기금속분해법(MOD, Metal Organic Decomposition)에 의하여 ITO 박막을 제조하고 SnO$_2$의 조성과 소성온도의 변화에 따른 박막의 특성변화를 고찰하였다. SnO$_2$의 양이 변하여도 ITO는 In$_2$O$_3$의 결정구조를 유지하고 있었으며, 이로부터 Sn이 In자리를 치환하여 고용체를 형성함을 알 수 있었다. SnO$_2$를 9wt.% 첨가 하였을때 비저항이 2.5$\times$$10^{-3}$$\Omega$-cm로 가장 낮은 값을 보였으며, 이는 타 연구자들의 결과치 보다 약 10배정도 큰 값이다. 이러한 비저항값의 차이는 작은 입경으로 인한 이동도의 감소 때문인 것으로 판단되었다. 투광도는 SnO$_2$의 첨가량 및 소성온도에 크게 의존하지 않았으며 가시영역에서 90% 이상을 보였다. 광흡수단으로부터 계산된 optical energy gap은 4.51-4.96eV 이었다. Thin films of Indium tin oxie (ITO) were prepared by the process of metal organic decomposition. Light transmittance and electrical transport properties of the films were studied with varying the firing temperature and SnO$_2$content. XRD study showed that tin substituted indium in the In$_2$O$_3$lattice. The resistivity had the minimum value of 2.5 ${\times}$ 10$\^$-3/$\Omega$-cm when the content of SnO$_2$was 9wt.%. This value was higher by a factor of 10 than the previously reported results. This difference was attributed to the low mobilities presumably caused by the fine grain size. The transmittance of ITO films in the visible range was over 90%, and the optical energy gap calculated from the absorption edge was in the range of 4.51 and 4.96eV.

비정규직과 정규직 비교연구 동향분석에 기반한 사무비서직 종사자에 관한 시사점 제안연구

고성민,박윤희 한국비서학회 2023 비서·사무경영연구 Vol.32 No.4

본 연구의 목적은 국내 학술지에 발표된 비정규직과 정규직을 비교하는 양적연구를 분석함으로써 연구의 특징을 파악하고 사무비서직 종사자의 비정규직 문제에 대한 시사점과 향후 연구 방향을 제시하는 것이다. 이를 위해 연구 기간을 지정하지 않고 2023년 9월 기준에서 학술연구정보서비스(RISS)에서 ‘비정규직’, ‘비교’, ‘분석’을 키워드로 사용하여 양적연구로 진행한 국내 학술 논문 41편을 선정하여 분석하였다. 분석 결과를 요약하면 다음과 같다. 첫째, 비정규직과 정규직에관한 연구는 국내에서 2003년 이후 꾸준히 진행되어 왔다. 특히 2005년과 2017년에 해당 연구가집중적으로 발표되었다. 게재지별로는 경영 분야에서 가장 활발한 연구가 진행되었다. 둘째, 연구대상 논문은 서비스업 종사자와 여성을 대상으로 한 연구가 많았다. 연구방법은 설문조사와 패널조사가 주로 사용된 연구 방법이었으며, 종단연구와 횡단연구가 모두 활용되었다. 연구분석 방법은 독립변인의 종속변인에 대한 영향력을 요인별로 알아보기 위한 회귀분석과 비정규직과 정규직비교를 위한 t-test를 사용한 연구가 가장 많았다. 임금 차이 분석을 위해서는 Oaxaca 분해가 활발히 사용되었다. 셋째, ‘직무만족’이 가장 많이 사용된 종속변인이었으며, 그 외 다양한 변인들이활용되었다. 독립변인으로는 고용 형태를 제외하고는 임금이 가장 많이 사용되었다. 워드 클라우드 분석을 통해 변인 중 빈도가 높은 고용 형태와 직무만족, 조직몰입이 주제어로도 자주 사용된것을 확인할 수 있었다. 이러한 연구 결과를 통해 사무비서직 종사자의 고용 형태 연구에 관한향후 연구 방향과 시사점을 제안하였다 This study examined the characteristics of research by conducting a comprehensive analysis of quantitative research comparing temporary and permanent workers in domestic journals, to offer insights and directions for future research pertinent to office secretarial workers in the temporary employment sectors. Forty-one papers conducted as quantitative research using ‘temporary workers’ and ‘comparison’ as keywords in the Research Information Sharing Service(RISS) were selected and analyzed as of September 2023. The analysis results are as follows. First, research on temporary and permanent workers has been conducted steadily in Korea since 2003. By publication, the most active research was conducted in management. Second, there have been many studies on service workers and women in the research subject papers. The primary research methods were surveys and panel studies, using longitudinal and cross-sectional approaches. Common analysis methods included t-tests and regression to assess the influence of independent variables on dependent ones. Third, 'job satisfaction' was the most used dependent variable, and various other variables were assessed. These research results provided suggestions and implications for studies on the employment patterns of office secretarial workers.