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.

농축 계수비를 이용한 해산 식품 중의 허용농도 설정

이원근,이창민 경희대학교 산학협력기술연구원 1999 산학협력기술연구논문집 Vol.5 No.-

Concentration limit of radioactive accumulation is not established so, effective public information to the people is limit. furthermore, several data which is not suitable for korean is used. Therefore, in this paper, concentration limit is determined using Korean food intake. Even if there were already-established research data, the current research was helpful to researchers in laboratories by giving them the sense of the current status in determining permissible concentration and understanding the plant habitat characteristics about the power plant. Ministary of science of technology will adopt the new recommendation soon, so at this paper, dose limit of new value is used. Experts in this area worry about over-expure by estimation of simple intake limit, therefore, complex intake limit is determined about all kinds of fishery products to solve the problem.

작물의 음향 신호에 대한 반응 분석에 관한 연구

이근영,허태원,김응성,이재원 成均館大學校 科學技術硏究所 1996 論文集 Vol.47 No.2

The puper studies the relationship between plants and audio signals. Responses of plant are transformed to electrical signals and digitized to process them on computer. Variance and mean are used for spatial domain analysis. and Fourier transform is used for frequency responses analysis as tools. We used celery cabbage, cucumber, parsley and onions as experimental plants. With this experiments, we found out that specific plants are sensitive to specific music signals and external stimulus.

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.

臨界 原子爐의 核的 特性

李源根 慶熙大學校 1984 論文集 Vol.13 No.-

The purpose of this study is to measure and determine accurately the critical mass which is the most important unclear characteristics in operation of AGN-201 reactor and the minimum amount of unclear fuel, U-235, to sustain chain reaction. The reactor temperature to affect critical mass was 18.4℃ during performing this experiment. As the result of critical experiment, the critical mass is 687.5 grams under the temperature condition mentioned the above.

용접 불티 차단막의 방염 및 난연성능 평가

권오승,이근원,하동명 한국화재소방학회 2001 한국화재소방학회논문지 Vol.15 No.2

본 연구에서는 조선 및 화학공장 등 산업현장에서 용접ㆍ용단작업 공정에서 비산 되는 불티에 의한 화재 예방를 위하여 불티 차단막에 관한 방염 및 난연 성능 평가를 실시하였다방영성능 실험결과 기존제품의 용접 불티 차단막 6종 모두 충분한 방염성능을 갖고 있었다그러나, 용접ㆍ용단 불꽃에 의한 난연성실험 결과 섬유유리에 수지코팅한 제품 2종은 용접ㆍ용단 불티에 대한 화재예방성능이 부족한 것으로 나타났다용접 불티 차단막의 최소산소지수의 국내기준은 30이상으로 고려하는 것이 좋을 것으로 사료된다용접 불티 차단막의 성능향상을 위한 지속적인 연구가 필요하며, 방염 및 난연성능 기술지침 개발의 기초자료로서 활용될 수 있을 깃으로 사료된다. This study was undertaken to evaluate the performance of flame retardant for fire precaution from sparks at welding-cutting process in industry sites such as shipbuilding yard and chemical factoryAs the results of the performance experiment, six kinds of welding blanket in samples that are used commercially had enough in the performance of flame retardantNevertheless, the performance to fire precaution on welding blanket shows that the coating product of two kinds is not sufficientThe lower oxygen index to welding blanket is considered that it is more than 30 in domestic standardWe suggested that the performance improvement of flame retardant for welding blanket need continuously, and the guideline of the flame retardant to welding blanket should be considered and established.

WTO 농업교섭의 추이와 우리농업의 대응

이원근 대구대학교 경제경영연구소 2005 경제경영연구 Vol.3 No.1

본 연구는 1993년에 체결된 WTO 농업협정과 2000년부터 시작된 새로운 농업교섭에서 제시된 각국의 세부원칙 등을 교섭단계별로 검토하고 또한 주요국의 WTO 농업교섭 전후의 농업정책상의 변화를 각국의 농업예산집행 내역을 중심으로 살펴봄으로써 우리나라의 금후 농업교섭 및 정책상의 대안을 제시하고자 한다. 그동안 우리나라는 농업부문에 대해서는 개도국의 지위를 인정받아 WTO 협정체결에 따른 영향이 그렇게 없었지만 새로운 WTO 교섭에서는 국내지지, 수출보조, 국경조치 등 핵심의제에 대한 미국과 케언즈 그룹 등 농산물수출국의 제안이 첨예화되고 있는 것이 현실이다. 뿐만 아니라 이들 농산물수출국은 교섭에 임함에 있어서 이미 자국의 농업정책의 기조를 녹색정책으로 전환하였거나 하고 있는 상태로 WTO 교섭상의 문제에 대해 사전 대비책이 구축되어 있다. 본 연구에서는 이 같은 상황을 고려하여 우리 농업정책의 금후 대안으로 농산물선진국과 같이 교섭의 영향을 덜 받을 수 있도록 황색. 청색의 정책으로부터 녹색정책 체제로 빨리 전환하여야 하며 협상에 대해서는 국민들의 충분히 이해를 바탕으로 협조를 확보할 수 있어야 할 것이다. 또한 우리의 농산물 자급도가 30% 미만인 점을 고려하여 안정된 식량확보를 위해 NTC에 대한 배려가 지속적으로 유지되어야 한다는 당위성을 주지시키기 위한 개발도상국의 지지를 확보해야 한다는 점을 제안하였다. this paper presents alternatives for korean agricultural policy from this time by looking into new modalities of the leading countries by each negotiation stage and the leading country's change in agricultural policy based on agricultural budget details after WTO agreement conclusion. we have not so much been influenced from WTO agreement conclusion as WTO recognized especially the status of the developed country to us in the agricultural field. But in new WTO negotiation, the modality from the leading agricultural countries becomes acute more and more. moreover, those agricultural product exporting countries have been building up the provision against the problem in WTO negotiation by changing from amble policy to blue policy. under those circumstances, the paper suggests that first, amble and blue policy should be changed into green policy gradually to minimize the impact from negotiation, and second, the assistance of nations for success of negotiation should be secured under ground of the nations' sufficient understanding without fail. and in view of self-supporting level of 30% below of Korean agricultural product, it is important for us to secure the support of the developed countries to persuade WTO numbers the reason why the special managements for NTC will constantly be maintained in Korea to achieve a stable food security.

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.