군산부근 조간대 및 조하대역에서의 식물플랑크톤과 Bacterioplankton

이원호,이건형,최문술,이다미,Lee, Won Ho,Lee, Gean Hyoung,Choi, Moon Sul,Lee, Da Mi 한국해양학회 1989 韓國海洋學會誌 Vol.24 No.3

Quantitative species distribution and primary productivity of phytoplankton were studied monthly from August, 1987 to July, 1988 along with the quantitative distribution of total heterotrophic bacterioplankton and three groups of physiologically chracteristic bacterioplankton in the intertidal and subtidal waters off Kum River Estuary, Yellow Sea. A total of 121 phytoplankton taxa including 102 diatoms occurred, and cell concentration ranged from 15 to 5451 (cells/ml). The great spatio-temporal variations of the number of phytoplankton species and cell concentration well reflected the environmental differences between the intertidal and subtidal waters. Primary productivity (in Piopt, mgC/$m^3$/hr) ranged from 0.6 to 27.3. Just after the phytoplankton bloom (March) Piopt was very low in April at station 1, where amylolytic bacterioplankton also showed quite low population density. The peaks of primary productivity were not always coincided with those of phytoplankton standing crop. The ratio of Piopt's between samples well indicated the environmental differences between the intertidal and subtidal waters. Little characteristic trend was found in the scatter diagrams of phytoplankton standing crop along the population densities of total heterotrophic bacterioplankton and the three groups of physiologically characteristic bacterioplankton. In summer the phytoplankton standing crop was minimum in contrast with the high population density of bacterioplankton, which implies the influx of much allochthonous orgainc matter from Kum River. The scatter diagrams of Piopt along bacterioplankton population density revealed some phenomena there. Piopt had highly positive correlation with the population density of amylolytie bacterioplankton($R^2$=0.84) and that of lipolytic bacterioplankton($R^2$=0.70) while total heterotrophic bacterioplankton and proteolytic bacterioplankton had lesser correlations with Piopt. From the regression lines the increase of unit Piopt (mgC/$m^3$/hr) in the study area was calculated to mean the increase of $9.0{\times}10$ cells/ml and $8.0{\times}10$ cells/ml of amylolytic bacterioplankton and lipolytic bacterioplankton, respectively.

소아치과 환자에서의 세보플루란을 이용한 흡입 심진정법

이원호,김영재,장기택,이상훈,서광석,김현정,염광원,박창주,Lee, Won-Ho,Kim, Young-Jae,Jang, Ki-Taeg,Lee, Sang-Hoon,Seo, Kwang-Suk,Kim, Hyun-Jeong,Yum, Kwang-Won,Park, Chang-Joo 대한치과마취과학회 2004 Journal of Dental Anesthesia and Pain Medicine Vol.4 No.2

Background: Sevoflurane, a rotatively new inhalational anesthetic. has non-pungent odor and is less reluctant to pediatric patients. The purpose of this study is to examine the feasibility of sevoflurane in inhalational sedation instead of the nitrous oxide for short and simple dental treatments in pediatric patients. Patients and Methods: Fifteen healthy children, whose dental treatment was abandoned due to their little or no cooperation, were selected with their caregivers' written permission. Deep sedation was induced and maintained with oxygen and 1-5% sevoflufane via specially designed nasal mask. Blood pressure, heart rate, oxygen saturation, and electrocardiogram were monitored at 3-nin interval. A dental anesthesiologist, who was independent of dental treatments, was wholly responsible for the sedation procedure. Post-sedation complications and operator's and caregiver's acceptability of this type of inhalational sedation were also investigated. Results: The systolic and diastolic blood pressure, heart rate, and oxygen saturation was significantly depressed during the deep sedation using sevoflurane (P < 0.05). No severe post-sedation complications were found, however, bradycardia was reported in 3 patients. Almost all the operators and caregivers answered that they would adapt this sedation procedure again if possible. Conclusion: In this study, inhalational deep sedation using sevoflurane for dental treatments was found to be very useful. Furthermore, the application of sevoflurane to conscious sedation for pediatric and adult dental patients should be added.

화산재해 대응 국제협력 네트워크

이원호,장은미,이승수,양원직,Yi. Waon-Ho,Chang. Eunmi,Lee. Sungsu,Yang. Won-Jik 한국방재학회 2014 한국방재학회 학술발표대회논문집 Vol.2014 No.1

백두산은 2002년 이후 화산활동 재개 가능성에 대해 주목받고 있는 화산으로서, 지리적으로는 중국과 북한령에 해당하나 실제 화산분화가 이루어질 경우 우리나라는 물론 아시아 지역의 여러 국가에 피해가 있을 것으로 예측되고 있다. 그러나 국내에는 화산 전문가가 부족한 실정이며, 국제적인 활동 및 국제적 네트워크 구축 또한 미비한 상황이지만, 화산재해에 관련된 자료를 확보하여, 백두산이 분화했을 때 국내뿐만 아니라 국제적 공동 대응에 필요한 인접 국가 및 주요 화산중심국들과의 국제협력 체계가 구축되어야 한다. 본 연구에서는 화산재해 국제전문가 참여연구 기반, 국제전문가들이 이용할 수 있는 온라인 네트워크 시스템, 화산재해 국제전문가 네트워크 등의 구축을 위해 참여 연구방안을 수립하고 국제 전문가 참여 연구체계를 구축한다. 본 연구의 기대효과로는 선진 화산재해 대응 기술을 조기 도입할 수 있게 되며, 화산재해 대응기술 분야의 국제적 협력 능력을 높이게 되고, 온라인 네트워크를 통한 해당 분야의 국제 전문가 네트워크를 확보할 수 있다.

지능형 선박의 자율운항제어를 위한 시뮬레이션 시스템의 설계 및 구현

이원호,김창민,최중락,강일권,김용기,Lee, Won-Ho,Kim, Chang-Min,Choi, Joong-Lak,Kang, Il-Kweon,Kim, Yong-Gi 한국정보처리학회 2003 정보처리학회논문지B Vol.10 No.4

ANS (autonomous navigation system) is an expert system which builds navigation plans, understands the current environment, and controls a surface ship. The most ideal way to test ANS is available after it is installed into a real surface ship. however, it is impossible to implement into a real ship. since it costs too much to develop the hardware interfaces just for testing. The most appropriate way for testing is to develop a simulation system for a surface ship and apply it. A simulation system for a surface ship consists of two sub-systems : one is a ship movement simulation system to imitate the physical movement characteristics of the ship, and the other is an environmental objects simulation system to build up surroundings of the ship. In this paper, we design and develop a surface ship movement simulation system which imitates its physical movement characteristics by using a motion equation for surface ship. 자율운항제어 시스템은 선박운항에 있어 항해계획을 수립하고 현재의 선박운항 상태를 파악하여 선박을 제어하는 항해 전문가 시스템이다. 이러한 자율운항제어 시스템을 테스트하기 위해서는 실제 선박을 대상으로 성능을 테스트하여야하나, 선박은 고가의 운송수단이고, 자율운항제어 시스템을 장착하기 위한 하부장치 인터페이스를 설계 및 구현하기에는 많은 시간이 소요되므로 선박시뮬레이션 시스템을 이용하는 것이 타당하다. 선박시뮬레이션 시스템은 선박의 물리적 운항특성을 모방하는 선박운동시뮬레이션 시스템과 선박 운항 주변에 변화하는 장애물을 시뮬레이션하는 주변객체 시뮬레이션 시스템으로 구성된다. 본 연구에서는 선박 운동방정식을 이용하여 선박의 물리적 및 운항 특성을 모방한 선박운동시뮬레이션 시스템을 설계 개발하였다.

회원작품-서울 위생병원 추모관

이원호,Lee, Won-Ho 대한건축사협회 2007 建築士 Vol.2007 No.8

동해(東海) 서남해역(西南海域) 식물(植物) 플랑크톤의 현존량(現存量) 분포(分布)와 수온(水瑥)-염분(鹽分) 특성(慝性)

이원호,심재형,Lee, Won Ho,Shim, Jae Hyung The Korean Society of Oceanography 1990 韓國海洋學會誌 Vol.25 No.1

Seawater temperature, salinity, inorganic nutrients and the standing crop of phytoplankton species of the 841 water samples from the upper 125 m at 15-40 stations on the 6 semiannual cruises in the southwestern waters of the East Sea (Korea) were studied during the period from September, 1981 to October, 1984, Among the 235 taxa identified two pennate diatioms, cylindrotheca closterium and Nitzschia delicatissima, were the most common and dominant species. The multiple regression analyses between net phytoplankton abundance (dependent variable) and associated environmental factors(independent variables) were applied to the samples from the surface mixed-layer. In spring the coefficients for the seawater temperature was 1. to 4.2 times greater than those for salinity, while the coefficients for the salinity was 2.1 to 3.4 times greater than those for seawater temperature in autumn. Distribution seawater temperature in spring, and salinity in autumn. Schematically the zone of high standing crops moved about on the T-S diagram in a cyclic manner. The distribution of phytoplankton standing crop was quite closely associated with the hydrographic conditions among various kinds of environmental factors studied.

연속냉간압연기 제어모델의 적응수정방법에 관한 연구

이원호,이상룡,Lee, Won-Ho,Lee, Sang-Ryong 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.7

The control model in the tandem cold rolling mill consists of many mathematical theories and is used to calculate the reference values such as the roll gap and the rolling speed for good operation of rolling mill. But, the control model used presently has a problem causing inaccurate prediction of the rolling force. By the parameter identification, it was found that the main factor causing inaccurate prediction of the rolling force was incorrect modeling of the friction coefficient and the flow stress. To get rid of the erroneous factor new adaptive schemes are suggested in this work. Those are a long-time adaptation by the iterative least-square method and a short-time adaptation by the recursive weighted least-square method respectively. The new equations for the friction coefficient and the flow stress are derived by applying the suggested adaptive algorithms. Through the on-line test in an actual mill, it is proved that the rolling force predicted by the new equations is more accurate than the one by the existing equations ever used.

레이더 관계식 산정을 위한 격자망 크기 결정

이원호,김진극,Lee, Won-Ho,Kim, Jin-Geuk 한국농공학회 2006 한국농공학회논문집 Vol.48 No.5

The purpose of the study is to determine grid cell of radar relationship, and to promote the radar data on hydrology field. The study region is the Chungjudam basin with a drainage area of $6,648km^{2}$ located within the 260 km circle under the DWSR-88C C-band umbrella(Kwanak Mt Radar). Grid cell was produced to extract radar reflectivity and rainfall data of the same time and point using Arc-view software package. The grid cell size is to estimate mean correlation coefficient for $1km{\times}1km,\;2km{\times}2km,\;3km{\times}3km$ grid. The result of mean correlation coefficient showed good result(0.57) for the $1km{\times}1km$ grid cell. The 32 rainfall stations Z-R relationship was estimated in Chungjudam basin.

우리나라 재난안전기술개발의 현주소와 활성화 방안

이원호,Lee, Won-Ho 한국건설안전협회 2008 建設 安全技術 Vol.47 No.-

회원작품 - 히든베이 호텔

이원호,Lee, Won-ho 대한건축사협회 2013 建築士 Vol.2013 No.8