A₃B형 1예

박덕우,박일우,윤갑준,임성자,신계철,이성일 연세대학교 원주의과대학 1995 원주의대논문집 Vol.8 No.1

통신사업자의 멀티미디어 사업영역 설정에 관한 연구

윤문길,박계두 한국항공대학교 경영연구소 1997 경영연구 Vol.4 No.1

The businesses of computing, communications, and content are converging or collapsing to create a new industry sector: multimedia industry. This new industry is the engine of the new economy and will be critical to leading a successful transition Synergy in the fields of telecommunication, information technology, consumer electronics and content providers is me of the key factor in making multimedia services and products a reality today. The convergence of these traditionally independent sectors is giving a great improvement to the multimedia market, providing the end users with new tools and services, almost unrealizable only a few yews aga In this paper, at a point of telecommunication carriers view, we address a business domain for multimedia market, which contains the scope of the multimedia business to be adopted and the integration strategy of the related business Based on the analysis for each multimedia industry, we recommend some suggestion for deciding the multimedia business domain of telecommunication carriers.

역압력구배하에서 윗벽면 및 평판슬릿흡입이 난류경계층의 구조에 미치는 영향

박계향,이학성,윤명식,유상신 한국항공대학교 1994 論文集 Vol.32 No.-

역압력 구배하에서 벽면흡입과 모델 평판의 슬릿흡입이 난류 경계층구조에 미치는 영향에 대하여 실험적으로 연구하였다. 압력탭이 설치된 평판을 실험부에 설치한 후 평판위에 역압력구배가 작용되도록 하고 경계층 내의 속도 분포와 난류강도를 열선유속계로 측정하였다. 역압력구배가 커지면 경계층의 천이점은 평판의 상류쪽으로 이동하며 평판의 벽면에서 슬릿흡입을 하면 경계층내의 난류강도가 감소하고, 흡입량을 증가하면 난류 강도는 더욱 감소한다. An experimental study on the boundary layer structure on the flat plate with upper wall and slit suction under adverse pressure gradients is presented. Velocity profiles and turbulent intensities in the boundary layer are measured by hot-wire anemometer system. The transition point of a bondary layer moves upstream direction as the adverse pressure gradient increases. Slit suction causes a reduction of turbulent intensity of boundary layer. Reduction of trubulent intensity increases as the suction coefficient increases.

Epidemiologic Study on Psoriasis

( Yoon Kee Park ),( Moo Yon Cho ),( Seung Kyung Hann ),( Hyung Joo Kim ),( Seung Hun Lee ),( Won Houh ),( Jae Bok Jun ),( Moo Hyung Lee ),( Kye Suk Lee ),( Soo Nam Kim ),( Hyung Geun Park ),( Young Ke 대한피부과학회 1992 Annals of Dermatology Vol.4 No.1

Impaired Diastolic Recovery after Acute Myocardial Infarction as a Predictor of Adverse Events

Yoon, Hyun Ju,Kim, Kye Hun,Kim, Jong Yoon,Cho, Jae Young,Yoon, Nam Sik,Park, Hyung Wook,Hong, Young Joon,Kim, Ju Han,Ahn, Youngkeun,Jeong, Myung Ho,Cho, Jeong Gwan,Park, Jong Chun Korean Society of Echocardiography 2015 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.23 No.3

<P><B>Background</B></P><P>To investigate the impact of left ventricular (LV) diastolic functional recovery on major adverse cardiac events (MACE) 6 months after acute myocardial infarction (AMI) in patients with preserved LV systolic function.</P><P><B>Methods</B></P><P>A total 463 patients with preserved LV systolic function at 6 months after an AMI were divided into two groups based on the extent of diastolic recovery assessed by echocardiography: group I (n = 241) showed improving diastolic function and group II (n = 222) did not. MACE included death, recurrent myocardial infarction, and rehospitalization due to heart failure, and these events were compared with the patients' characteristics at baseline.</P><P><B>Results</B></P><P>Compared with group I, the patients in group II were older and had a higher prevalence of hypertension and diabetes. Blood levels of hemoglobin and triglyceride were lower in group II, whereas the levels of N-terminal pro-B-type natriuretic peptide (NT-proBNP) and of high-sensitivity C-reactive protein were higher in this group than in group I. MACE were significantly more frequent in group II than in group I. Age, elevated NT-proBNP, and impaired diastolic recovery were significant independent predictors of MACE.</P><P><B>Conclusion</B></P><P>Despite improvement in LV systolic function, LV diastolic function had not improved in 222 patients (47.9%) by the 6-month follow-up after the index AMI, and impaired diastolic functional recovery was found to be an independent predictor of MACE. Evaluation of diastolic function would be a useful way to stratify risk in patients discharged after an index AMI.</P>

Unwanted effects of risk notification for breast cancer regarding intention toward mammography utilization

Park, Keeho,Choi, Kui Son,Kye, Su Yeon,Park, Su Ho,Yoon, Nan He,Park, Eun Cheol John Wiley Sons, Ltd. 2010 PSYCHOONCOLOGY Vol.19 No.8

<P>Objective: This study was conducted to explore the possible influence of risk notification regarding breast cancer on the intention of women to undergo mammography.</P><P>Methods: This study employed an uncontrolled before–after design. A baseline survey was conducted in a random sample of 1000 women to examine the sociodemographic variables, breast cancer risk factors, and screening-related variables. All subjects received the findings of a personalized health-risk appraisal (HRA) following the baseline interview. After 2 months of the baseline survey, a survey was conducted in 855 women to assess whether the intention of undergoing mammography had changed. Thus, the modification in the intention by communicating the individual risk status was assessed.</P><P>Results: There was an overall increase from baseline to post-intervention in the number of subjects with the intention of undergoing mammography. Women in the contemplation and action stages who had intention toward mammography utilization at baseline showed decreased intention regarding mammography. After intervention in the form of HRA to promote mammography utilization, it was determined that young age, being married, being in neither the precontemplation nor the relapse stage, and having one or more risk factors of breast cancer were the predictors of intention to undergo mammography.</P><P>Conclusions: Our findings indicate that communicating the risk status by HRA service can have a negative effect in the promotion of health-conscious behavior. The selection of the appropriate type of intervention using HRA to promote mammography utilization in the target group will be enhanced by taking into account the risk status of each client. Copyright © 2009 John Wiley & Sons, Ltd.</P>

Characteristics and Clinical Outcomes of Cancer Patients Who Developed Constrictive Physiology after Pericardiocentesis

Hyukjin Park,Hyun Ju Yoon,Nuri Lee,Jong Yoon Kim,Hyung Yoon Kim,Jae Yeong Cho,Kye Hun Kim,Youngkeun Ahn,Myung Ho Jeong,Jeong Gwan Cho 대한심장학회 2022 Korean Circulation Journal Vol.52 No.1

Background and objectives: This study aimed to identify the characteristics and clinical outcomes of cancer patients who developed constrictive physiology (CP) after percutaneous pericardiocentesis. Methods: One-hundred thirty-three cancer patients who underwent pericardiocentesis were divided into 2 groups according to follow-up echocardiography (CP vs. non-CP). The clinical history, imaging findings, and laboratory results, and overall survival were compared. Results: CP developed in 49 (36.8%) patients after pericardiocentesis. The CP group had a more frequent history of radiation therapy. Pericardial enhancement and malignant masses abutting the pericardium were more frequently observed in the CP group. Fever and ST segment elevation were more frequent in the CP group, with higher C-reactive protein levels (6.6±4.3mg/dL vs. 3.3±2.5mg/dL, p<0.001). Pericardial fluid leukocytes counts were significantly higher, and positive cytology was more frequent in the CP group. In baseline echocardiography before pericardiocentesis, medial e′ velocity was significantly higher in the CP group (8.6±2.1cm/s vs. 6.5±2.3cm/s, p<0.001), and respirophasic ventricular septal shift, prominent expiratory hepatic venous flow reversal, pericardial adhesion, and loculated pericardial fluid were also more frequent. The risk of all-cause death was significantly high in the CP group (hazard ratio, 1.53; 95% confidence interval,1.10–2.13; p=0.005). Conclusions: CP frequently develops after pericardiocentesis, and it is associated with poor survival in cancer patients. Several clinical signs, imaging, and laboratory findings suggestive of pericardial inflammation and/or direct malignant pericardial invasion are frequently observed and could be used as predictors of CP development.

Gender Difference of Cardiac Remodeling in University Athletes: Results from 2015 Gwangju Summer Universiade

Hyun Ju Yoon,Kye Hun Kim,Kyle Hornsby,Jae Hyeong Park,Hyukjin Park,Hyung Yoon Kim,Jae Yeong Cho,Youngkeun Ahn,Myung Ho Jeong,Jeong Gwan Cho 대한심장학회 2021 Korean Circulation Journal Vol.51 No.5

Background and Objectives: There is little data about cardiac geometry in highly trained young athletes, especially female specific changes. We investigated gender difference on exercise induced cardiac remodeling (EICR) in highly trained university athletes. Methods: A total of 1,185 university athletes divided into 2 groups; female (n=497, 22.0±2.3 years) vs. male (n=688, 22.6±2.4 years). Remodeling of the left ventricle (LV), left atrium (LA), right ventricle (RV), and any cardiac chamber were compared. Results: LV, LA, RV, and any remodeling was found in 156 (13.2%), 206 (17.4%), 82 (6.9%), and 379 athletes (31.9%), respectively. LV, LA, and any remodeling were more common in male than female athletes (n=53, 12.1% vs. n=103, 15.5%, p=0.065), (n=65, 13.1% vs. n=141, 20.5%, p<0.001), (n=144, 30.0% vs. n=235, 34.2%, p=0.058), respectively, whereas RV remodeling was significantly more common in female than male athletes (n=56, 11.3% vs. n=26, 3.8%, p<0.001). Interestingly, the development of LV, LA, and RV remodeling were not overlapped in many of athletes, suggesting different mechanism of EICR according to cardiac chamber. Various predictors including sports type, heart rate, muscle mass, fat mass, body surface area, and training time were differently involved in cardiac remodeling, and there were gender differences of these predictors for cardiac remodeling. Conclusions: EICR was common in both sex and was independently developed among cardiac chambers in highly trained university athletes. LV and LA remodeling were common in males, whereas RV remodeling was significantly more common in females demonstrating gender difference in EICR. The present study also demonstrated gender difference in the predictors of EICR.

급성 심근경색증 환자의 입원 중 합병증과 1년간 임상경과의 예측인자

윤현주 ( Hyun Ju Yoon ),정명호 ( Myung Ho Jeong ),김계훈 ( Kye Hun Kim ),박근호 ( Keun Ho Park ),심두선 ( Doo Sun Sim ),박형욱 ( Hyun Wook Park ),윤남식 ( Nam Sik Yoon ),홍영준 ( Young Joon Hong ),김주한 ( Ju Han Kim ),안영근 ( Yo 대한내과학회 2009 대한내과학회지 Vol.77 No.6

Background/Aims: This study evaluated the predictors of in-hospital early complications and 1-year clinical events in patients with acute myocardial infarction (AMI). Methods: A total of 1,000 consecutive patients (63.4±12 years, 705 males) with AMI were divided into two groups according to the presence of in-hospital events (IHE): group I had IHEs (n=175, 65.6±12 years, 115 males), and group II had no events (n=825, 62.8±12 years, 590 males). IHE included death, cardiogenic shock, pacemaker implantation, ventricular arrhythmia, and mechanical ventilation. Results: The levels of glucose, creatinine, maximal creatine kinase (CK), troponin-I, hs-CRP, and NT-proBNP were higher in group I than in group II. Increased left ventricular dimension, a low ejection fraction, mitral regurgitation (MR), diastolic dysfunction, and a high wall motion score index were more common in group I compared with group II. The initial Killip class, ST-elevation AMI, and high levels of glucose, creatinine, CK-MB, troponin I, hs-CRP, NT-proBNP, and MR were significant independent predictors of IHE on multivariate analysis. During the 1-year follow-up, the major adverse cardiac event (MACE) rate was higher in group I than in group II. IHE, especially cardiopulmonary resuscitation, cardiogenic shock, and respiratory failure, were independent predictors of MACE during the 1-year clinical follow-up. Conclusions: High levels of glucose, creatinine, CK-MB, troponin I, hs-CRP, NT-proBNP, and MR were predictors of IHE, and the 1-year MACE-free survival was lower in AMI patients with IHE. (Korean J Med 77:723-733, 2009)

The Relationship among N-Terminal Pro-B-Type Natriuretic Peptide, High-Sensitivity C-Reactive Protein and Infarct Size in Patients with Acute ST-Elevation Myocardial Infarction

Sim, Doo Sun,Ahn, Youngkeun,Kim, Yun-Hyeon,Seon, Hyun Ju,Park, Keun Ho,Yoon, Hyun Ju,Yoon, Nam Sik,Kim, Kye Hun,Hong, Young Joon,Park, Hyung Wook,Kim, Ju Han,Jeong, Myung Ho,Cho, Jeong Gwan,Park, Jong The Korean Society of Cardiology 2015 Korean Circulation Journal Vol.45 No.4

<P><B>Background and Objectives</B></P><P>We sought to investigate the relationship between levels of high-sensitivity C-reactive protein (hs-CRP) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) and the infarct size and left ventricular (LV) volume after acute myocardial infarction (MI).</P><P><B>Subjects and Methods</B></P><P>Eighty-six patients with acute ST-elevation MI underwent delayed enhancement multidetector computed tomography immediately after they underwent percutaneous coronary intervention to determine the infarct size. LV function and remodeling were assessed by echocardiography. Hs-CRP and NT-proBNP were measured at admission, 24 hours and two months later.</P><P><B>Results</B></P><P>Both hs-CRP and NT-proBNP at 24 hours showed a positive correlation with infarct size and a negative correlation with LV ejection fraction at the baseline and two months later. NT-proBNP at two months correlated with infarct size, LV ejection fraction, and LV end diastolic and systolic volume indices at two months. In patients with high NT-proBNP levels at 24 hours and two months, infarct size was larger and LV ejection fraction was lower. NT-proBNP was higher in patients who developed LV remodeling at two months: 929 pg/mL vs. 134 pg/mL, p=0.002. In contrast, hs-CRP at two months showed no relationship to infarct size, LV function, or LV volumes at two months.</P><P><B>Conclusion</B></P><P>Elevated hs-CRP level 24 hours after the onset of acute MI is associated with infarct size and LV dysfunction, whereas elevated levels of NT-proBNP 24 hours and two months after the onset of acute MI are both correlated with infarct size, LV dysfunction, and LV remodeling.</P>