食堂環境이 人體에 미치는 影響에 關한 硏究

李良元,李炳甲 中央醫學社 1972 中央醫學 Vol.22 No.2

An experimental study of carbon monoxide concentration in air of the restaurants(total 50) and carboxyhemoglobin saturation of workers(512) who were working in the restaurants was conducted by the staffs of the Dept. of Preventive Medicine from November 1970 to December 1971. Carbon monoxide concentration in air was measured with Kitagawa CO detecting tube and carboxyhemoglobin saturation in the blood of workers was measured by The expired air analysis technique following Dr. Breysse and Gabay. Each worker was asked to inhale and exhale deeply prior to commencement of the test. They were then requested to inhale and hold their breath for approximately 20 seconds after which they were instructed to exhale "normally" then to blow the remainder of the breath into a balloon. This expired air was then immediately examined with the Kitagawa tube and carboxyhemoglobin saturation was calculated from the following regression relationship: COHb%=0.5+(CO ppm/5) The findings and results obtained were summarized below: 1. The mean CO concentration in air of restaurants of Class A, where only propane gas was used for fuel, was less than 50 ppm and the mean COHb saturation in the blood of workers was 7.5% in summer and 8.1% in winter. 2. The minimum concentration of CO in air of the hall of Class B restaurants where used gas was 96.5 ppm during summer and maximum concentration was 180.3 ppm in the kitchen during winter. And the COHb saturation was 12.5-17.1% which could initiate the slight CO poisoning. 3. In the restaurants of Class A where charcoal was used for fuel, the air contained 83.5-144.8 ppm of carbon monoxide and the COHb saturation in the blood of workers was 11. 1-15.4% which could cause slight symptoms of CO poisoning. 4. Mean concentration of CO_ in the B or C graded restaurants where charcoal was used, was 265 ppm and the COHb saturation was as high as 20% which could cause moderate CO poisoning to the workers. 5. Even in the summer, so called wine shop where coal was used for fuel contained more than 124.3 ppm of CO and in the winter it contained 221.5 ppm. Among them we could find some contained as much as 350 ppm of carbon monoxide in air. The mean COHb saturation in the blood was 21.4% which could cause moderate symptoms of CO poisoning. 6. Highly significant correlation was found between the COHb saturation and the concentration of CO in air of restaurants.

정적, 배경 및 동적 모자이크 영상 구축과 재분배에 관한 구현

이양원,강오형,양원보 群山大學校 情報通信技術硏究所 1999 情報通信技術硏究論文集 Vol.3 No.-

Image mosaic is called that creation a new image which to composition search for overload region from several image. In this paper, we represent construction image mosaic not depend on direct method but tree-based method. We represent static and dynamic image mosaic construction method that extract to from background and dynamic object in image. When image mosaic is constructed, we could constructed that only background mosaic eliminated from dynamic object. We understood synopsis mosaic that is constructed by overlaying the trajectories of the moving objects on top of the background mosaic. In this paper, also we represent that redistribution method from image mosaic.

Web GIS를 이용한 지역격차 측정 시스템 제작에 관한 연구

이양원 서울大學校 社會科學大學 地理學科 2001 地理學論叢 Vol.38 No.-

Evaluation of Expression of Lipases and Phospholipases of Malassezia restricta in Patients with Seborrheic Dermatitis

이양원,정원희,이신영,이영훈 대한피부과학회 2013 Annals of Dermatology Vol.25 No.3

Background: Malassezia species (spp.) are cutaneous opportunistic pathogens and associated with various dermatological diseases including seborrheic dermatitis, dandruff and atopic dermatitis. Almost all Malassezia spp. are obligatorily lipid-dependent, which might be caused by lack of the myristic acid synthesis. Recent genome analysis of M. restricta and M. globosa suggested that the absence of a gene encoding fatty acid synthesis might be compensated by abundant genes encoding hydrolases, which produce fatty acids, and that lipases and phospholipases may play a role in virulence of the fungus. Objective: The current study aimed to investigate the contribution of lipases and phospholipases in virulence of the M. restricta as being the most frequently isolated Malassezia spp. from the human skin. Methods:Swap samples of two different body sites of at least 18patients with seborrheic dermatitis were obtained and in vivo expression of lipases and phospholipases of M. restricta was analyzed by the gene specific two-step nested RT-PCR. Results: The results of the current study suggest that majority of the patients display expression of lipase RES_0242. Conclusion: These data imply a possible role of lipase in the host environment to produce free fatty acids for the fungus.

물과기름의 상극성을 완화시키는 안정제-유화제

이양원,Lee, Yang-Won 대한제과협회 1996 베이커리 Vol.10 No.-

A GIS-based Simulation to Predict GPS Availability along the Tehran Road in Seoul, Korea

이양원,서용철,Ryosuke Shibasaki 대한토목학회 2008 KSCE Journal of Civil Engineering Vol.12 No.6

GPS (Global Positioning System) availability is somewhat limited in urban areas because portions of the signals are blocked, reflected, and diffracted by obstructions like buildings. This has been well known through a number of on-site surveys, and recent GIS (Geographic Information System) approaches also simulate the urban GPS availability using 3-D (three-dimensional) terrain data. However, such simulation for skyscraper areas in Seoul, Korea has not been reported yet. Hence, we built a GIS-based prediction model to analyze the GPS availability in terms of LOS (Line of Sight) and DOP (Dilution of Precision), and conducted a simulation for the Tehran Road in Seoul, according to time and location. Our prediction model can show spatiotemporal aspects in GPS availability and apply to examine when and where the navigation services are usable in dense urban areas.

인터넷을 통한 자판기 원격제어 구현 연구

이양원,김미 호남대학교 정보통신연구소 2001 정보통신연구 Vol.11 No.-

As giving If on electric home appliance like as TV, Air-conditioner, etc., with the development of electric products and home networking, it has been possible to communicate through the Internet. In this paper, we proposed and developed the system which is possible to control the commercial vending machine using embeded internet card through internet. We implemented the basic circuit and application program for TCP/IP communication program by Java applet.

호남대학교 특성화사업 지역산업(스마트가전) 맞춤형 ICT융복합 기술인력 양성사업단

이양원,Lee, Yang-Won 한국공학교육학회 2016 공학교육동향 Vol.23 No.3

클라우드 서버 기반 IoT를 이용한 무선기지국 원격 감시시스템 개발

이양원,김철원,Lee, Yang-weon,Kim, Chul-won 한국정보통신학회 2018 한국정보통신학회논문지 Vol.22 No.6

넓은 지역에 광범위하게 분포되어 있는 통신용 무선기지국은 관리에 많은 어려움이 있다. 특히 산간 오지에 있는 무인 통신무선 기지국은 위급한 상황 발생시에 접근에 많은 어려움을 겪고 있다. 대형 통신회사들은 송수신 정보만 원격으로 관리하고 있고 실제 시설 유지를 책임지고 있는 지역 중소기업 협력업체들은 이러한 기술을 보유하고 있지 않아서 일일이 현장 방문을 통하여 확인하고 있는 실정이다. 본 연구에서는 넓은 범위에 산재해 있는 무선기지국내의 온도, 습도, 화염 발생여부, 전원 동작 여부를 실시간으로 모니터링 하여 클라우드 서버에 보내 사무실에서 실시간 모니터링을 통하여 관리하며 위급시 경고 메시지 전송 등이 수행이 가능한 시스템을 클라우드 서버 구축을 통하여 IoT 센서 기술을 이용하여 구현한 내용을 제시하고자 한다. Radio base stations, which are widely distributed across large areas, have many difficulties in managing them. Unmanned radio base stations in remote mountains are having a hard time accessing them in case of emergencies. Major telephone service providers only remotely control incoming and outgoing information and local small business partners responsible for maintaining actual facilities do not possess such technologies, so they are each checked during field visits. In this study, in order to process the sensor raw data and smoothing, we apply the particle filters and confirmed that the performance of sensor data accuracy is increased. Integrated system using temperature, humidity, fire condition, and power operation at a wide range of radio base stations under the real-time monitoring status is operated well. It show that all of the status of base station are monitored at the remote office using the cloud server through internet networking.

리눅스 환경에서 USB 디바이스 제작에 관한 연구

이양원 한국정보통신학회 2004 한국정보통신학회지 Vol.5 No.2