미세 골절 진달을 위한 초음파 C-scan의 활용 가능성

박원근,최민주,이원흠,이윤준,이헌주,강창익,박전홍 제주대학교 공과대학 첨단기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.2

The study examines the medical potential of an ultrasonic C-scanning technique and for diagnosis of the fatigue induced micro-fractures of the bone. In general, it is not easy to detect the micro­fracture by a simple radiological technique. In the study, the micro­fractures were made on the tibia taken from pigs using a three point bending. Comparison was made between the ultrasonic C-scan images (25 MHz) and X-ray images of the bones with the micro-fractures, It was found that the micro-fractures invisible on the X-ray images were observed on the ultrasonic images. It is proposed further in-vitro and in-vivo studies making the ultrasonic C-scan technique clinically useful for the diagnosis of the fatigued induced micro-fractures of the bone which are not possible to detect by the conventional radiological method.

지난 2년간의 학회지 "신경정신의학" 심사 평가보고

김찬형,김세주,김도관,김성곤,박원명,송동호,박용천,이영문,오강섭,정영철,이상열,김주한,이동영,이헌정,함병주,김율리,김문두,김정진,이강욱,천근아,김재진,홍진표,홍승철 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

권역심뇌혈관질환센터 사업의 비용-편익 분석

김병호 ( Byung Ho Kim ),감신 ( Sin Kam ),배상근 ( Sang Geun Bae ),김건엽 ( Keon-yeop Kim ),이원기 ( Won Kee Lee ),홍남수 ( Nam-soo Hong ),박형근 ( Hyeung-keun Park ),이혜진 ( Heyjean Lee ),조은정 ( Eun-jung Cho ),채성철 ( Shung C 한국보건정보통계학회(구 한국보건통계학회) 2017 보건정보통계학회지 Vol.42 No.1

Objectives: This study was conducted to investigate economic feasibility of operating Regional Cardiocerebrovascular Centers using cost-benefit analysis. Methods: The current study assessed cost and benefit data collected from nine hospitals which were designated as Regional Cardiocerebrovascular Centers between 2008 and 2010. Results: The operation of Regional Cardiocerebrovascular Centers reduced mortality rate and length of stay due to acute myocardial infarction and stroke and also decreased disability occurred after stroke. The total calculated cost of operating nine Regional Cardiocerebrovascular Centers was 19.85-22.30 billion won and the minimum benefit calculated was 23.98 billion won. Applying the maximum cost and the minimum benefit, the net benefit was 1.68 billion won, which is estimated to 190 million won per Regional Cardiocerebrovascular Center. Conclusions: The present study revealed that the operation of Regional Cardiocerebrovascular Centers was economically beneficial. The benefit would be larger if intangible benefit such as the long-term effects to community hospitals and enhancement of quality of life of patients and their families are considered.

臨界原子爐의 爐雜音 解析

李源根 慶熙大學校 1982 論文集 Vol.11 No.-

The reactor noise analysis methods have been widely employed for determining reactor parameters such as time constant and dynamic characteristics, assessing corrected operating characteristics, and diagnosing unexpected abnormal status in advance. Even though the reactor noise analysis methods are developing toward applying to the power reactor the basic theory for stochastic process of nuclear fission can only be verified though experimenting in a critical assembly. The present study is, thus, to develop the fundamental theories and verify through reactor experiments using AGN-201 critical assembly which starts to operate on campus recently. This paper deals with the basic approach to the reactor noise analysis, and is proceeded the detailed experimental results which will be reported in the succeeding reports.

除草劑의 種類와 施用量 및 플라스틱 필름 멀칭이 雜草發生과 고추의 收量 및 生育에 미치는 效果

李政明,曺哉銑,崔根元 慶熙大學校 1983 論文集 Vol.12 No.-

Studies were conducted to investigate the effect of Lasso [Alachlor: 2-Chloro-2'6'-dimethyl-N-(methoxymethyl) acetanilied]on mulched and nonmulched hot pepper filed. Lasso treatment greatly inhibited weed growth and the granular formulation was more effective than emusifiable concentrate in controlling weed growth in both mulched and nonmulched plots. Lasso effect was not apparent about 50 days after treatment. The growth of pepper plant was greatly promoted by mulching and yield of green peppers was more than doubled by transparent polyethylene film mulching. There was no plant in the entire plot which showed apparent phytotoxicity by Lasso treatment.

中國에 있어서 中·近代 關稅制度에 대한 歷史的 考察

이원근 국제무역학회 2002 국제무역연구 Vol.8 No.1

본 연구는 중국의 중·근대 관세제도에 대한 역사적 고찰이다. 중국에 있어서 관세제도의 기원에 대해서는 명확하지는 않지만 주왕조 때 이미 관세가 존재하고 있었던 것으로 보여지나 국가간 교역량이 적어 내국관세으로서의 통과세가 주된 것이었다. 그러나 中代에 이르러서는 당 왕조와 같이 거대한 통일국가가 성립하면서 처음으로 외국과의 해상교역이 시작되었고 늘어나는 교역이익을 통제할 필요성이 요구되었다. 이에 보조를 같이하여 처음으로 금일의 세관에 해당되는 市舶司가 설립되었으며, 관세도 하나의 제도화된 형태로 나타나기 시작하였다. 近代에 들어서면서 중국에 대한 서구 열강들의 침탈이 강화되면서 중국관세조직에 대한 외국인의 참여가 증대되면서 전통적인 중국의 관세제도는 자취를 감추고 금일과 같은 서구화된 海關형태를 갖추게 되었다. Customs serves as a important means in financial and economic policy in every countries and it's historical study provides us with many valuable materials that be of help to understand a change of customs system in the future. This study lays emphasis on collecting and analyzing materials of korean ancient customs system through historical study for chinese customs systems which have had influence on korean history directly and indirectly. All of the dynasty in china in ancient times mainly imposed transit duties in spite of there was a customhouse in the border and the volume of trade between countries was not so much in medieval times, importance for customs have been increased by means of active transaction at home or abroad in consequence, in the tang dynasty a special customs system which is called as Shih-po-ssu(市舶司) has been appeared in chinese customs history for the first time. in modem times, as national strength of china gradually went into a decline, customs business have been controlled by foreign office.

용접공들의 면역능에 관한 연구

이수일,조봉수,김영욱,고광욱,조원근,김영실,강수용,황인경,조병만,김돈균 大韓産業醫學會 1997 대한직업환경의학회지 Vol.9 No.1

The authors examined human immunity indicators such as CD4, CD8, Natural Killer(NK) cell, IgG, IgA, and IgM, and heavy metals such as Pb, Cr, Cd to evaluate the health hazard of welders. We selected total 126 male subjects, 60 welders who had more than 5 year working history as an exposure group, and 66 office workers and medical college students as a control group. This immunity evaluation approach is the first newly designed study that has never been tried in past studies on welder's heath evaluation. And the results were as follows. 1. Total lymphocyte count of peripheral blood was significantly higher in welder group, 2,615±650 ea/㎕ compared with 2,368±681 ea/㎕ in control group(p>0.05). 2. The proportion of CD4, CD8, NK cell in welder group was 37.5±9.4%, 24.0±8.8%, and 21.0±9.5%, respectively, and 35.5±6.5%, 25.0±6.9%, and 19.6±8.8% in control group. CD4 and NK cell were slightly higher, and CD8 was slightly lower in welder group. but there was no statistical significance between two groups(p≥0.05). 3. IgG, IgA, and IgM in welder group were 15.9㎎/㎗, 2.7㎎/㎗ and 1.5㎎/㎗, respectively, and 15.6㎎/㎗, 2.9㎎/㎗ and 1.7㎎/㎗ in control group. There was no statistical significance between two groups(p≥0.05). 4. Blood lead, cadmium and chromium concentrations were 4.2±1.8㎍/㎗, 0.4±0.38㎍/㎗, 1.2±0.6㎍/㎗ in welder group and 3.2±1.7㎍/㎗, 0.44±0.29㎍/㎗, 1.1±0.6㎍/㎗ in control group, respectively, and these value were within normal ranges.

透過法을 利用한 中性子 溫度側定 硏究

李原根 慶熙大學校 1992 論文集 Vol.21 No.-

An experimental investigation of the neutron temperature which is important to both reactor design and studying on neutron thermalizing behavior has been performed using AGN-201 reactor. Among two methods, danger coefficient technique and neutron transmission technique, later method is adapted in the present study. Gold and Indium are used as transmission materials. The results showed that the neutron temperature is 486 ˚K using Gold foil, and 434˚K with Indium foil.

기업테러·유괴에 대한 리스크 관리적 접근

이원근 大邱大學校 社會科學硏究所 2001 社會科學硏究 Vol.9 No.3

새천년의 시작과 함께 종말론적 테러위협이 고조되고 있으며 전 세계 각 지역에서는 민족분리 독립, 이슬람 극단주의, 극좌·극우 등 다양한 동기에 비롯된 테러가 발생하여 많은 인명피해가 발생하고 있으며 테러양상은 더욱 대형화·무차별화되고 있다. 특히 우려가 되는 것은 최근 해외직접투자건수가 과거에 비해 늘어나고 해외여행자수가 큰 폭으로 증가하고 있는 가운데 해외에서 우리 국민이 테러를 당하는 사례는 매년 늘어나고 있다. 그 중에서도 해외진출기업의 임직원이나 기업이 유괴, 납치, 살상, 폭파, 약탈 등 피해를 입는 경우가 큰 비중을 차지하고 있다. 이와 같은 기업테러·유괴는 기업의 경영에 심각한 타격을 줄뿐만 아니라 가정에까지도 미치는 영향이 크다. 미국이나 일본의 경우에는 관민이 일체가 되어 해외자국 기업의 테러행위에 대한 효과적인 대응을 위해 특별조직을 운영하고 있고 기업들은 전문적인 칸설던트의 도움을 받아 기업안전 관리에 노력하고 있다. 그것에 비해 우리 기업의 경우에는 이 같은 대비책이 미비하며 심지어는 전혀 무방비상태에 있는 기업도 많다. 그러나 이 같은 기업테러·유괴에 대한 대응책은 리스크 관리를 통하여 어느 정도 대응할 수 있다. 리스크 관리는 위험의 제어와 재무 양쪽에서 살펴볼 수 있다. 먼저 위험의 예방은 기업으로 하여금 사전에 테러를 초래하는 원인을 제거하는 것이며, 회사에서의 대책, 이동수단에 대한 대책, 가정에 있어서의 대책으로 나누어 대응방안을 강구하는 것이다. 위험의 방지는 기업테러·유괴가 현실에 발생한 경우의 대비책으로서 위기관리조직의 발족, 전문컨설던트의 기용, 사원의 안전교육, 유괴방지대책 매뉴얼작성, 인질석방금의 조달과 관련하여 자금을 준비하는 것이다. 테러가 현실적으로 발생하고 테러범과의 협상이 성공적으로 마무리되었다고 하여도 기업이 입게 되는 피해는 매우 크다. 이를 위해서는 위험을 보험에 전가할 필요가 있다. 테러·유괴와 관련하는 보험으로는 Kidnap and Ransom Insurance(유괴인질석방금보험)이 있다. 그런데 보험계약은 전체 기업테러유괴에 대한 대응책의 극히 일부분에 지나지 않으며 최선의 방책은 기업테러·유괴가 일어나지 않도록 사전에 방지하는 것이다.

原子力 發電所 使用後 核燃料 貯藏 方案의 比較 分析

李源根,金洸杓 慶熙大學校 1994 論文集 Vol.23 No.-

At present all the discharged spent nuclear fuells are stored in at-reator (AR) pools of each nuclear power plant in Korea, but most of the exciting AR pools will lose their full core reserve capacities in the late of 1990s Untill the long-term spent nuclear fuel management policy will be established, this cummulative spent nuclear fuels should be safely stored in an applicable storage facility. By this study results, the alternatives to solve this storage problem of the cummulative spent nuclear fuels are recommended as the followings : If the policy making would be done in the near future, the storage capacities of the existing pools would be expanded by the replacement of the old racks into or the installation of high density racks, and, if it could not be, a centralized wet or dry storage management of the spent nuclear fuels should be more reasonable.