지구성 운동이 부신피질호르몬에 미치는 영향

이창근,박병근 한국체육과학회 2024 한국체육과학회지 Vol.33 No.2

This study was to confirm the changes in cortisol and aldosterone according to the difference in endurance exercise period and exercise intensity in 18 female college students. control group(n=6) and exercise group(n=12) of two types were selected as experimental groups, and endurance exercise was performed 5 times a week for 12 weeks, and the results obtained are as follows. 1. Cortisol according to exercise period and exercise intensity showed a significant increase at 8 weeks (p<.01) and 12 weeks (p<.01) in both intensities of E.GI and E.GII. 2, Among the groups, cortisol showed significant differences between CG and E.GI and between CG and E.GI at 8 weeks (p<.01) and 12 weeks (p<.001). Looking at the above results, it was found that an exercise period of at least 8 weeks and an exercise intensity of 55-70% of a maximum heart rate are required to cause changes in cortisol according to the exercise period and exercise intensity. Since the exercise period and exercise intensity of this study did not show any significant change in aldosterone, it is expected that future studies according to various exercise types are needed.

수목병해의 발생과 환경

이창근 한국양묘협회 1981 韓國養苗協會誌 Vol.9 No.-

회의실 카페트에서 방출되는 Ethylbenzene과 1,2,3-Trimethylbenzene의 거동특성에 관한 수치 해석적 연구

이창근,정진,김창녕 대한설비공학회 2006 설비공학 논문집 Vol.18 No.2

This study has been conducted to quantify the emissions of Volatile Organic Compounds(VOCs) in a conference room. The carpet has emitted a variety of VOCs, but in this study, 2 VOCs compounds have been considered: Ethylbenzene and 1,2,3-Trimethylbenzene. In this study, a three dimensional numerical analysis has been carried out to investigate the emission and behavior characteristics of Ethylbenzene and 1,2,3-Trimethylbenzene emitted from the carpet in the conference room. The mass diffusion coefficient and the initial concentrations of VOCs in the carpet have been obtained from experimental data with non-linear regression. It has been found that the concentrations and emission factors of VOCs have exponentially decayed with time and that the concentration gradients and emission factors of VOCs are different from each other for various components. This study may supply fundamental understandings for the emission and behavior characteristics of VOCs.

跆拳道의 歷史的 由來와 精神的 價値에 관한 硏究

이창근 長安專門大學 社會科學硏究所 1996 社會科學硏究 Vol.5 No.1

지방재정지출의 지역별 효과 분석

이창근 한국지방재정학회 2013 한국지방재정논집 Vol.18 No.2

The study aims to analyze the effect of local government expenditure on regional economies during 2008 through 2011. The determinants of functional local government expenditure (e.g., per capita investment expenditure and per capita consumption expenditure) are regional population structure and non-urbanization ratio, which are statistically significant. The effects of active fiscal policy of local government on regional economies are different by a region under economic crisis and economic recession. Also, the enlargement of all kinds of functional local government expenditures do not induce the regional economic growth in all regions. It is important to promote local treasury investment project representing regional characteristics in aging regions and non-urban regions. Local fiscal investment would replace the scarce capital within region and local government expenditures could lead and attract the private investment. 본 연구의 목적은 시·군·구 단위의 지역 차원에서 지방재정지출이 지역경제에 미치는 영향을 분석하는 것이다. 분석시기는 2008~2011년까지이며, 먼저 기능별 지방재정지출의 결정요인을 분석한 결과, 1인당 투자적 지출과 1인당 소비적 지출 모두에 통계적으로 유의한 영향을 끼치는 결정요인은 지역의 인구구조 변수, 비도시화비율로 나타났다. 이러한 결과를 바탕으로 우리나라 228개 시·군·구 지역을 총 8개 지역으로 분류하였고, 이를 다시 고령화 지역과 비도시화 지역으로 재분류하였다. 지역별로 기능별 지방재정지출과 지역경제성장과의 관계 분석결과, 외부요인에 의한 경제위기 상황이나 경기침체 시기에 경기부양을 위한 적극적인 재정조기집행 효과가 모든 지역에서 동일하게 긍정적으로 나타난다고 판단하기 어렵다. 또한, 모든 종류의 기능별 지방재정지출 증대 모두 지역경제성장에 정(+)의 효과를 가져온다고 볼 수 없다. 고령화 지역이나 비도시 지역에서 가장 중요한 것은 중앙정부 주도에 의하기보다 지역별 특성을 최대한 살린 적극적인 지방재정투자사업의 추진이었으며, 일부 지역별로 불필요한 예산 집행은 지양되어야 할 것이다. 또한, 도시 지역 가운데, 서울, 부산, 대구 등 우리나라 주요 대도시 지역들의 경우에는 이들 지역의 투자적 지출 크기의 한계생산성, 투자적 지출 규모의 효율성 등에 대한 검토가 필요하다. 오히려 이들 지역의 경우에는 민간 자본의 지역경제성장에 대한 탄력성이 다른 어느 지역보다도 높으므로 민간 중심의 지역경제성장 방안을 적극적으로 고려할 필요가 있겠다. 궁극적으로 지방재정투자는 지역 내 부족한 자본을 대신하고, 지방정부의 재정지출은 민간투자 참여도 끌어낼 수 있어야 할 것이다.

Antithrombotic or Anti-Platelet Agents in Patients Undergoing Permanent Pacemaker Implantation

이창근,유상용,Man Yong Hong,Jinkun Jang 대한심장학회 2012 Korean Circulation Journal Vol.42 No.8

Background and Objectives: The growing implantations of electrophysiological devices in the context of increasing rates of chronic an-tithrombotic therapy in cardiovascular disease patients underscore the importance of an effective periprocedural prophylactic strategy for prevention of bleeding complications. We assessed the risk of significant bleeding complications in patients receiving anti-platelet agents or anticoagulants at the time of permanent pacemaker (PPM) implantation. Subjects and Methods: We reviewed bleeding complications in patients undergoing PPM implantation. The use of aspirin or clopidogrel was defined as having taking drugs within 5 days of the procedure and warfarin was changed to heparin before the procedure. A significant bleeding complication was defined as a bleeding incident requiring pocket exploration or blood transfusion. Results: Permanent pacemaker implantations were performed in 164 men and 96 women. The mean patient age was 73±11 years old. Among the 260 patients, 14 patients took warfarin (in all of them, warfarin was changed to heparin at least 3 days before procedure), 54patients took aspirin, 4 patients took clopidogrel, and 25 patients took both. Significant bleeding complications occurred in 8 patients (3.1%),all of them were patients with heparin bridging (p<0.0001). Heparin bridging markedly increased the length of required hospital stay when compare with other groups and the 4 patients (1.5%) that underwent the pocket revision for treatment of hematoma. Conclusion: This study suggests that hematoma formation after PPM implantation was rare, even among those who had taken the anti-platelet agents. The significant bleeding complications frequently occurred in patients with heparin bridging therapy. Therefore, heparin bridging therapy was deemed as high risk for significant bleeding complication in PPM implantation.

지역별 분야별 지방재정지출과 지역경제 성장과의 인과관계 분석

이창근 한국지방재정학회 2019 한국지방재정논집 Vol.24 No.3

The purpose of this study is to verify the causality between local government expenditure by sector and the regional economic growth. As the analyzed results, the Wagner hypothesis as well as the Keynesian model were mostly established in the causality between local government expenditure by sector and the regional economic growth, except for the causality between the economic development expenditure and the regional economic growth in Seoul Metropolitan regions. Through the verification of the casuality between local government expenditure by sector and the regional economic growth, it was confirmed that the impact of local government expenditure by sector on the regional economic growth differs by region. For example, in Seoul Metropolitan regions the role of social development expenditure was more important among local government expenditure by sector. In other non-Seoul Metropolitan regions, the role of general administration expenditure and economic development expenditure were necessary for the regional economic growth. For the low income regions, the role of social development expenditure was the most important to achieve the regional economic growth in the Keynesian model. However, the regional economic growth led to the increasement of the social development and the economic development expenditures in the Wagner hypothesis. Ultimately, in the low-income and the other non-Seoul Metropolitan regions where private capital accumulation has been lacking, the regional income growth as well as the social development and general administration expenditures for the regional economic growth were needed. Particularly, the regional income growth would lead to the increased local government revenue, which would induce the economic development expenditure. This is a virtuous cycle of economic feedback covering the Keynesian model and the Wagner hypothesis. 본 연구의 목적은 우리나라 지역별로 분야별 지방재정지출과 지역경제 성장과의 인과관계를 검증하는 것이다. 분석 결과, 우리나라의 분야별 지방재정지출과 지역경제 성장 간의 인과관계에서 수도권 지역의 경제개발비와 지역내총생산 간의 관계를 제외하면 대체로 케인즈 모형 뿐 아니라 바그너 가설도 함께 성립하였다. 또한 지역별로 분야별 지방재정지출과 지역경제 성장과의 인과관계 검증을 통해 지역경제 성장에 있어서 지방재정의 분야별 세출의 영향이 지역에 따라 다르게 나타난다는 것을 확인할 수 있었다. 가령 수도권 지역의 경우 지역경제 성장에 있어서 분야별 지방재정지출 가운데 사회개발비의 역할이 보다 중요하였다. 기타 비수도권 지역은 지역경제성장을 위해 무엇보다도 공공행정비와 경제개발비의 역할이 필요하였다. 저소득 지역의 경우 케인즈 모형에서는 지역소득 증대에 있어서 사회개발비의 역할이 가장 중요하였으나, 바그너 가설에서는 지역경제 성장이 사회개발비 뿐 아니라 경제개발비 증대로 이어졌다. 궁극적으로 민간의 자본 축적 등이 부족한 저소득 지역 및 기타 비수도권 지역의 경우 지역경제 성장을 위한 사회개발비나 공공행정비의 역할 외에도 지역소득 증가가 세수 증대를 통한 경제개발비 지출 확대로 이어지는 경제의 선순환 피드백 효과 구축이 보다 적극적으로 필요하다.

Comparison of Complications between Endoscopic and Percutaneous Replacement of Percutaneous Endoscopic Gastrostomy Tubes

이창근,강현우,임윤정,이준규,고문수,이진호,양창헌,김재학 대한의학회 2013 Journal of Korean medical science Vol.28 No.12

When replacing percutaneous endoscopic gastrostomy (PEG) tubes, an internal bolster may be retrieved either percutaneously or endoscopically. The aim of this study was to compare the complications of percutaneous and endoscopic method during PEG tube replacement. The medical records of 330 patients who received PEG tube replacement were retrospectively analyzed. According to the removal method of internal bolster, we categorized as endoscopic group and percutaneous group. Demographic data, procedure-related complications and risk factors were investigated. There were 176 cases (53.3%) in endoscopic group and 154 cases (46.7%) in percutaneous group. The overall immediate complication rate during PEG tube replacement was 4.8%. Bleeding from the stoma (1.3%) occurred in percutaneous group, whereas esophageal mucosal laceration (7.4%) and microperforation (0.6%) occurred in endoscopic group. The immediate complication rate was significantly lower in the percutaneous method (OR, 6.57; 95% CI, 1.47-29.38, P=0.014). In multivariate analysis, old age was a significant risk factor of esophageal laceration and microperforation during PEG tube replacement (OR, 3.83; 95% CI, 1.04-14.07, P=0.043). The percutaneous method may be more safe and feasible for replacing PEG tubes than the endoscopic method in old patients.

Differential Effects of Low and High Radiation Dose Rates on Mouse Spermatogenesis

이창근 대한방사선방어학회 2022 대한방사선방어학회 학술발표회 논문요약집 Vol.2022 No.04

A Case of Hepatic Portal Venous Gas as a Complication of Endoscopic Balloon Dilatation

이창근,강현우,송민근,김재학,이준규,임윤정,고문수,이진호 대한의학회 2011 Journal of Korean medical science Vol.26 No.8

The development of hepatic portal venous gas (HPVG) is rare but it might be associated with serious disease and poor clinical outcome. Recently, several iatrogenic causes of HPVG have been reported. HPVG as a complication of endoscopic balloon dilatation is a previously unreported event. We experienced a case of HPVG after endoscopic balloon dilatation in a 31 yr-old man with pyloric stricture due to corrosive acids ingestion. The patient was treated conservatively with fluid resuscitation, antibiotics and Levin tube with natural drainage. Five days later, the follow-up CT scan showed spontaneous resolution of HPVG. This case reminded us the clinical importance and management strategy of HPVG. We report here a case of iatrogenic HPVG with a review of relevant literature.