투과형 포토폴리머에서 각도 다중화에 의한 홀로그램 기록

조영래,김은석,김남 충북대학교 컴퓨터 정보통신 연구소 1999 컴퓨터정보통신연구 Vol.7 No.2

본 논문에서는 DuPont사의 HRF-150-38 포토포리머를 기록매질로 이용하여 다중 홀로그램을 기록하였다. 입사빔의 세기 변화에 따른 포토폴리머의 특성을 조사하였고, 실험을 통하여 측정된 각도 선택도(angular selectivity)의 값이 Kogelnik의 2광파 결합 이론으로부터 유도된 각도 선택도의 값에 만족됨을 살펴보았다. 고정된 입사빔 사이의 각도에 대해서 3.6°의 각도로 최대 11개의 평면파 홀로그램을 각도 다중화 하였다. In this paper, multiple holograms were recorded in DuPont's HRF-150-38 photopolymer. The characteristics of the photopolymer was investigated with the variation of incident power. The angular selectivity which is measured to record multiple hologram was satisfied with the value of Kogelnik's two-wave coupled theory. Using the angular multiplexing technology, maximum 11 holograms were recorded with 3.6 degrees in the fixed incident angle range.

식육산업의 발전을 위한 정육점에 관한 조사 연구

조규석,김계웅,김석은 公州大學校 産業開發硏究所 1998 産業開發硏究 Vol.6 No.-

This survey was carried out in order to investigate and analyse the current status of 81 total of fresh meat stores located in Chungnam, Seoul, Kyonggi, and Inchon districts for making a development strategy. The results obtained were as follows; 1. Of 81 total of fresh meat stores, family size were the largest in group of 4∼5 persons(77.8%), the number of stores below 10 pyeong were 63.0 percentage(51 stores), the number of stores for rent were 72.8 percentage(59 stores), the number of getting average monthly income below 1,500 thousand won 63.0 percentage(51 stores). 2. In duration of store management, the number of stores below 5 years-career were 42.0 percentage(34 stores), the number of stores over 16 years-career were 4.9 percentage(4 stores), and then, 52 total of stores answered that they would manage only duration of their generation(64.2%). 3. Fresh meats at 46 stores had been supplied through wholesale stores(56.8%), and those at 14 stores had been supplied through feeding and slaughtering at manager's farm(17.3%). 4. At sides of consumer's preference of fresh beef and pork, consumers preferred to loin muscle(40.7%) and bacon part(54.4%), respectively. 5. 22 total of managers would like to change the name of stores(27.2%), and then they answered to be changed in order of marketing center of animal products, fresh meat center, and marketing store of animal products. 6. All stores had been marketing beef and pork, chicken meat and eggs had been saled at 27 stores(33.3%) and 19 stores(23.5%), respectively. And then, other animal products had been supplied and saled at only 2 stores. 7. The sale price-down at 41 stores wanted to be controlled according to going down at farm price(50.7%). However, that at 25 stores didn't want to be gone down(30.9%).

상부 조기 위암 환자의 복강경하 상부 위절제술 3례 경험

조규석,김형철,박경규,이문수,송옥평,임철완,신웅진,주종우,유기원 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Background : The reported incidence of early gastric cancer located in the upper portion of the stomach has been increasing with the recent advances in its diagnosis and screening. Recently, we have successfully performed laparoscopic assisted proximal gastrectomy and gastric tube reconstruction without pyloroplasty on three patients with early gastric carcinoma localized to the upper third of the stomach. We describe our modification of this procedure in this report. Method : After creating an surgical pneumoperitoneum, the stomach was mobilized using laparoscopic coagulating shears. Upper half of the greater curvature and three-quarters of the lesser curvature were then dissected along with regoinal D2 lymphadenectomy. This was followed by a 5 cm, longitudinal mini-laparotomy in the upper abdomen, and the construction of the exteriorized stomach with a gastric tube measuring 20 cm long and 4 cm wide. Reconstruction with an esophagogastrostomy was performed using a circular stapler. Result : No post-operative morbidity or mortality was observed in this small series of patients. The average operative time was 250 minutes (range 220-300 minutes), and the average blood loss was 150 ml (range 90-180 ml). The mean number of lymph nodes harvested during these laparoscopic proximal gastrectomies was 24 nodes (range 22-25 lymph nodes). The average postoperative hospital stays was 7.5 days (range 7-8 days). Conclusion : Our technique of laparoscopic assisted proximal gastrectomy and gastric tube reconstruction without phloroplasty offers a minimally invasive technique with the potential of impoving the post-operative quality of life patients with an early-stage proximal gastric cancer.

전파조정기를 이용한 마이크로파 소자용 Calibration

석은영,조현광,서영석,한교용 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1

A microwave device measurement tool kit using the TRL method for microwave tuner was developed. Teflon substrate was used for easy manufacturing. An adapter from CDI was used for the junction transition between microstrip and coaxial line. Mask production procedure which have the 3:1 reduction ratio was developed for microstrip transmission line manufacturing. Using these procedure the Cal Kit which can have Thru, Reflect, and Line was manufactured. TRL error correction method can be applied to the Kit. We tested the Cal kit and the error due to the microstrip line could be corrected. It can be applicable to the accurate measurement of microwave transistors.

압력비에 따른 2차원 초음속 터빈의 유동특성에 대한 실험적 연구

조종재,김귀순,김진한,이은석 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.1

본 연구에서는 초음속 충동형 터빈의 유동특성을 알아보기 위해 소형 초음속 풍동을 설계 하였으며 Single pass Schlieren system을 이용하여 유통을 가시화하였다. 실험은 2차원 초음속 노즐과 익렬을 조합하여 압력비에 따라 실시하였다. 실험을 통해 충격파를 포함한 복잡한 유동 형태와 노즐-익렬, 충격파-경계층 상호작용 등을 관찰할 수 있었다. In this paper, a small supersonic wind tunnel is designed and built to study the flow characteristics of a supersonic impulse turbine. The flow is visualized by means of a single pass Schlieren system. The supersonic cascade with 2-dimensional supersonic nozzle was tested over a wide range of pressure ratio. Highly complicated flow patterns including shocks, nozzle-cascade interaction and shock boundary layer interactions are observed.

심전도의 디지털 기록화 모듈과 개인용컴퓨터 저장/분석시스템의 개발

조명찬,김기석,배장환,연태진,김동운,이태수,전은석,김유진 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.2

연구목적: 현재 우리나라의 의료분야에서는 정보기술의 발전으로 처방 전달 시스템과 전자차트의 활용이 상용화 되고 있으나 병원내에서 가장 많이 처방되고 검사되는 12-유도 심전도의 디지털화와 이에 연계된 심전도 결과의 개인용 컴퓨터로의 저장, 인터넷을 이용한 병원으로의 전송이나 타 기관에서의 심전도 결과의 동시 관찰 등에 관한 기술 등은 개발되지 못한 상태이다. 이에 본 연구에서는 심전도를 디지털화하며 저장이 가능한 PC 모듈을 개발하고 심전도 결과를 병원 전산 시스템에 포함시켜 병원내외에서 편리하게 조회, 검색할 수 있는 디지털 인터페이스를 개발하려 하였다. 재료 및 방법 : 낮은 전력에서 잡음특성이 우수한 대역여파기와 증폭기를 설계하였으며 각종기능이 내장된 고신뢰성 프로세서를 채택하였으며 전원 잡음이 고려된 필터와 전원 회로 설계로 하드웨어를 개발하였다. MSC 6.0과 Visual Basic 6.0을 바탕으로 하여 active X 모듈화를 유도하고 조회용 PC에서의 복원과 PACS로의 연동을 통해 순환기내과용 PACS 개발이 가능하도록 소프트웨어를 준비하였다. 결과: 심전도 검사자가 쉽게 장착, 검사가 가능한 소형화된 측정 모듈을 개발하였고 극저전류에서 동작이 가능하였으며 우수한 데이터의 압축 및 복원률을 구현하였다. 결론: 이번 심전도 디지털 모듈의 개발로 기존의 감광지에 의존하던 심전도 결과의 보존과 보관공간에 의한 경제적인 손실을 상당 부분 해결할 수 있으며 OCS에 연계된 결과로 인해 원내에서의 다면적 진료가 가능하다. 이번 연구에서 개발된 기술은 향후 디지털화된 심전도 기록장치와 같은 고부가 의료장치의 국산화와 광파일 의무기록 시스템이나 검사물의 무선 전송에 채용되어 의료 전달 체계나 응급체계의 발전에 기여하리라 사료된다. Purpose : The progressed communication technology commercialized the order communication system ( OCS) and the electric medical records( EMR) in the field of medicine in Korea. However, technologies of digitalization such as recording to personal computer, transfer to internet and simultaneous observation of electrocardiogram ( ECG) recorded at the different center were not realized yet. This study tried to invent personal computer module that can digitalize and record of the ECG and design the digital interface that can approach and search digitalized ECG in various part of hospital simultaneously. Materials and Methods : We had designed high-fidelity digital filter and amplifier which can work in very low voltage, had selected multifunctioned microprocessor. Activation X modulation was conducted by MSC 6.0 and Visual Basic 6.0. Softwares were prepared for the transfer of ECG informations from terminal PC to PACS and cardiologic PACS was designed for future application. Results : We have developed the small, portable, very low voltage managed ECG module and high quality digitalized information compression software in OCS and PACS. Conclusion : This invented ECG digital archive module can save hospital cost by substitution of ECG papers for digital storage or on-line storage, therefore ECG data can be handled in multisector of the hospital and through telemedicine. This technology can be applied to domestic ECG digitalizing device development and effective medical transfer system by adoption cordless medical information delivery.

2.5-헥산디온에 노출된 근로자에게서 발생한 말초 신경병증

조성용,장용석,최은경,김진석,유재영,우극현,최태성 대한산업의학회 2007 대한직업환경의학회지 Vol.19 No.1

목적: 영상음향장비 제조업체에서 2,5-헥산디온을 취급한 근로자에게서 발생한 다발성 말초 신경병증 환례를 보고하고, 동일 공정근로자들의 말초 신경기능을 조사하고 자 한다. 방법: 환례에 대해 방사선학적 검사, 소변 및 혈액 검사, 신경전달속도 검사, 작업환경 측정을 하였으며, 2,5-헥산디온의 노출을 중단시킨 후 5개월 후에 다시 신경전달속도 검사를 하였다. 동일공정 근로자들의 영향평가에서는 2,5-헥산디온에 노출된 13명의 남자 근로자를 노출 군으로, 해당 물질에 노출된 적이 없는 5명의 남자 근로자를 비노출군으로 선정하여 검사를 하였다. 결과: 환례의 신경전도 검사결과 양측 척골신경과 정중 신경에 이상소견을 보였으며, 호전여부를 관찰하기 위하여 5개월 후 추적검사를 실시한 결과 증상 및 신경전달속도 검사결과가 호전되었다. 동일공정 근로자들의 영향평가에서 노출군의 정중 신경과 척골신경이 비노출군에 비하여 유의하게 감소되어 있었다. 감각 신경의 진폭의 경우, 노출군의 정중 신경과 비복 신경이 감소되었으며, 운동 신경 전도속도에서는 노출군의 비골신경이 유의하게 감소되어 있었다. 말단 잠복기에서는 노출군의 정중신경, 척골신경, 비골신경, 경골신경이 비노출군에 비해서 유의하게 연장되어 있었다. 결론: 환례의 증상과 신경전달속도 검사의 이상소견은 2,5-헥산디온에 의한 말초신경병증에 부합되었다. 동일공정 근로자 건강영향평가에서 신경전달속도 검사결과 노출 군과 비노출군간의 유의한 차이가 있었는데, 이를 통해 2,5-헥산디온이 근로자들의 신경독성에 영향을 줄 수 있다는 것을 확인할 수가 있었다. Objectives: This study is a case report of 2,5-hexanedione induced occupational peripheral polyneuropathy. We also investigated the peripheral nerve function of all workers who had been exposed to 2,5-hexanedione in the same process. Methods: In June, 2006, a 2,5-hexanedione exposed worker complained of both hand numbness. He received neurologic, radiologic, laboratorial and electrophysiologic evaluation, including measurements of workplace environment. Five months after cessation of exposure to 2,5-hexanedione, a follow-up electrophysiologic examination was done. We evaluated the peripheral nerve function of 2,5-hexanedione exposed workers by comparing 13 male 2,5-hexanedione exposed workers who were in same company with the patient and 5 male workers who had not been exposed to 2,5-hexanedione. Results: Under electrophysiologic examination, there were abnormalities in sensory and motor nerve velocity, terminal latency, and F-latency of both median nerve and ulnar nerve. After 5 months, the patient symptoms and the results of follow-up electrophysiologic examinations were improved. Comparing the 2,5-hexanedione exposed group with the unexposed group, the sensory nerve velocity of the median and ulnar nerves in the exposed group was decreased. The motor nerve velocity of the peroneal nerve, and sensory nerve velocity of the median and sural nerves were decreased. Terminal latency of median, ulnar, peroneal, and tibial nerves in the exposed group were increased compared with the unexposed group(<0.05). Conclusions: 2.5-hexandione can induce peripheral polyneuropathy in male workers.

사슴 飼育實態와 녹용의 利用方法 開發에 관한 硏究

曺圭錫,金錫銀 公州大學校 資源科學硏究所 1998 資源科學硏究論文集 Vol.6 No.-

Subjects for the study were 190 famers from eight districts of mid-western part of Chung Nam area and 188 parents of students from Seoul, Taejon, Chonan andYesan, who wererunningadeer ranch and were asked the management of the ranch and how to use the antlers. 1. The kinds of deer they are breeding are rated 50.3% of elk, 32.9% of sika deer, 13.0% red deer and 3.9% of crossbreed showing an average of19.3% a farmhouse. 2. For improving the quality of velvet, the farmers used 60.5% of high-grade feed stuff and 13.2% of medical plants and residual products. The most appropriate time for producing the velvet was considered 55∼60 days after the cutting of antlers in sika deer, 65∼70 days in red deer and 75∼80 days in elk. 3. In the ranch management plan 80.6 percentage of farmers wanted to maintain the status Quo, 8.4% wanted to reduce and 11.0% were planing increase. Among the various kinds of difficult problems, they showed the most serious difficulty in selling the products especially in the districts of Yesan and Chongyong(78.4%). 4. For a development of antlers industry it is found that much interest has to be taken in order of products sales(44.8%) restriction of importing antlers(40.5%) priority of consumer(37.9%)and an organization of association(31.0%). 5. A group of people aged 41 to 60 were tended to purchase antlers most(89.1%). Among them, housewives formed 51.3%. In the rate of purchasing antlers, a group with a monthly incomes of 2,000 thousand won(56.4%), was higher than one with a monthly income of 3,010 thousand won(8.0%). But there was no significant difference(P>0.05) 6. The channel to purchase antlers through arein order of the doctor of chinese medicin(63.3%), deer ranch(19.1%) and close acquaintances(17.6%). Some of the purchasers are of ten in doubt about whether the antlers they are buying are real or not. A device is needed to quarantee the quality of velvet.

르 꼬르뷔지에의 건축에 있어서 '기본 볼륨의 가치'에 관한 고찰

이은석,조대희,김종헌 慶熙大學校 1997 論文集 Vol.26 No.-

Making a simple form in architecture has been a major concern of modern architects. Such tendency has been shown explicitly in the works of Le Corbusier, who was one of the most influencing architects in modern age. This study aims to find how Le Corbusier came to find out the value of the primary volume, and also what importance the houses of his early works carry. Further more, this study examines the value of the inner space, which is defined by the simple cubic outer shape. The result of this study reveals the inadequate view which argues that the simplicity of modern architecture was derived only from the functionalism.

생성된 기준 영상과의 차를 이용한 정지 영상 압축에 관한 연구

김은원,김석호,조원경 慶熙大學校 大學院 1993 高凰論集 Vol.12 No.-

Digital image compression that is essential to reduce the transmission cost and the memory storage is necessary for image data processing. The method of transform coding that good quality of rebuilded image with more higher compression ratio is proposed and estimated. In this paper, we proposed reference block generation methods and improved JPEG base line system.