직업성 안상해(眼傷害)에 관한 기술역학적 연구

이원철,이강숙,맹광호,이승한,정상문,Lee, Won-Chul,Lee, Kang-Sook,Meng, Kwang-Ho,Lee, Seung-Han,Chung, Sang-Moon 대한예방의학회 1988 Journal of Preventive Medicine and Public Health Vol.21 No.1

A total of 181 cases of industrial ocular injuries hospitalized and treated at the St. Mary's Hospital, Seoul during the 5-year period was studied on their epidemiological characteristics. Of these patients 96.7% were males, and 43.6% were in twenties, 49.7% of the cases were injured on left eyes. There were no statistically significant differences in frequencies of study subjects by day of the week and month of the year. Most common injury hour were between 10- <12 AM(13.6%) and between 2- <4 PM(20%). Of the total 101 cases, 37.6% were working less than 6 months, and 73.7%, less than 2 years. Of the total, 42.3% were involved in machinary work and 13.9%, in construction work. According to the American National Standard Method of recording basic facts relating to the nature and occurrence of work injuries, 62%, among all source of injuries was metal item and the most common accident type was struck by flying objects(76.2%). Among 181 cases, only 2 cases were wearing protective equipment when the accidents occurred.

RPWM기법을 이용한 세탁기용 유도전동기 구동 시스템의 소음 및 진동 저감

이원철,김이훈,배우리,장봉안,양하영,원충연,Lee, Won-Chul,Kim, Lee-Hun,Bae, Woo-Ri,Jang, Bong-An,Yang, Ha-Yeong,Won, Chung-Yuen 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.3

본 연구에서는 유도전동기 구동 시스템에서 새로운 RPWM 방식을 제안하였다. 유도전동기 구동 시스템에서 발생하는 소음을 줄이기 위하여 공간벡터 RPWM방식에 기반을 둔 RPWM방식을 제안하였다. 제안된 RPWM방식을 드럼 세탁기에 적용하여 세탁기에서 발생하는 소음과 진동을 측정하였으며 그 결과를 비교하였다. 제안된 방식의 타당성을 입증하기 위하여 시뮬레이션과 실험을 수행하였다. The random pulse width modulation(RPWM) in inverter-fed induction motor drive is presented. This paper describes a RPWM method based on space vector PWM strategy for shaping the switching noise spectrum in such a way it can merge with the natural system noise. To verify the validity of the proposed RPWM scheme, the experiment based on the DSP56F803 microprocessor was executed finally, the simulation and experimental results will be given to demonstrate the effectiveness of the unposed RPWM scheme.

폐암(肺癌)에서 전이(轉移)된 뇌종양환자(腦腫瘍患者)의 한방(韓方) 치험(治驗) 1례(例)

이원철,신광식,Lee, Won-Chul,Shin, Kwang-Sik 대한암한의학회 1999 大韓癌韓醫學會誌 Vol.5 No.1

We have experienced a case of metastatic brain tumor originated from lung cancer treated by oriental medicine (Herbal medication, Acupuncture therapy, Moxa therapy) and We have a good result from that case to report it. According to the therapentic effects, it could be suggeted that Younggyaechulgamtanggagambang extracts and oriental medical symptomatic treatment were significant in improvement of the patient.

한국표준질병사인분류중 한방내과영역의 분류체계 개선 및 진단명 구성에 관한 연구

이원철,Lee, Won-Chul 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.1

Objectives : It is necessary that the international classification of diseases (ICD) be examined in order to comprise the third revision of the Korean Classification of Disease on Oriental Medicine (KCD-OM) and disease classification in the oriental internal medicine field. It is essential that the selection, classification and definition of disease and pattern names of oriental concepts in internal medicine be clear. Since 2008, the fifth revision of the Korean Classification of Disease (KCD-5) has been used in Korea. It was required to use the reference classification from the Oriental medicine area based on the ICD-10. Methods : In this review, the necessity for, meaning of and content of the third revision are briefly described. The ICD system was reviewed and KCD-OM was reconstructed. How diagnosis in the oriental internal medicine area had changed is discussed. Review and Results : In 1973, the disease classification of oriental medicine was established the basis on the contents of Dongeuibogam. It was irrespective of the ICD. As to the classification system in the Oriental internal medicine field, systemic disease was comprised of wind, cold, warm, wet, dryness, heat, spirit, ki, blood, phlegm and retained fluid, consumptive disease, etc. Diseases of internal medicine comprised a system according to the five viscera and the six internal organs and followed the classification system of Dongeuibogam. The first and second revisions were of the classification system based on the curriculum in 1979 and 1995. In 1979, in the first revision, geriatric disease and idiopathic types of disease were deleted, and skin disease was included among surgery diseases. This classification was expanded to 792 small classification items and 1,535 detailed classification items to the dozen disease classes. In 1995, in the second revision, it was adjusted to 644 small classes and 1,784 detailed classification items in the dozen disease classes. KCD-OM3 did KCD from this basis. It added and comprised the oriental medical doctor's concept names of diseases considering the special conditions in Korea. KCD-OM3 examined the KCD-OMsecond revised edition (1994). It improved the duplex classification, improper classifications, etc. It is difficult for us to separate the disease names and pattern names in oriental medicine. We added to the U code and made one classification system. By considering the special conditions in Korea, 169 codes (83 disease name codes, 86 pattern name codes) became the pre-existence classification and links among 306 U codes of KCD-OM3. 137 codes were newly added in the third revision. U code added 3 domains. These are composed of the disease name (U20-U33, 97 codes), the disease pattern name (U50-U79, 191 codes) and the constitution pattern name of each disease (U95-U98, 18 codes). Conclusion : The introduction of KCD-OM3 conforms to the diagnostic system by which oriental medical doctors examine classes used with the basic structure of the reference classification of WHO and raises the clinical study and academic activity of the Korean oriental medicine and makes the production of all kinds of nation statistical indices possible. The introduction of KCD-OM3 promotes the diagnostic system by which doctors of Oriental medicine examine classes using the association with KCD-5. It will raise the smoothness and efficiency of oriental medical treatment payments in the health insurance, automobile insurance, industrial accident compensation insurance, etc. In addition, internationally, the eleventh revision work of the ICD has been initiated. It needs to consider incorporating into the International Classification of Diseases some of every country's traditional medicine.

Logistic Analysis를 이용하여 분석한 인공유산이 속발성불임에 미치는 영향

이원철,Lee, Won-Chul 대한예방의학회 1982 Journal of Preventive Medicine and Public Health Vol.15 No.1

The methods controlling the confounding factors were discussed using the data of secondary infertility with induced abortion. Mantel-Haenszel method and logistic model were applied in the analysis to find out which factors were confounding and/or effect modification variables. In the logistic analysis, the main effect of induced abortion, spontaneous abortion, age and interaction effect between induced abortion and spontaneous abortion were chosen as independent variables being regressed into logistic functions. Spontaneons abortion was interpreted as a potential confounder and at the same time potential effect modifier and age was interpreted as potential confounder. Spontaneous abortion was shown to be more important influencing factor than age to the secondary infertility. In the course of logistic analysis, the problem of parameter estimation and hypothesis testing, assessing the fitness of a model, and selection of the best model were briefly explained. For the program of logistic model, FUNCAT Procedure of SAS package was chosen.

시호(柴胡)의 뇌해마 신경세포 보호효능에 대한 연구

이원철,신광식,Lee, Won-Chul,Shin, Kwang-Sik 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.4

Objective : This study was performed to investigate neuroprotective effects of Bupleuri Radix against oxidative and ischemic damages. Method : To observe the neuroprotective effects against ischemic damage, ischemic insult was induced by oxygen/glucose deprivation (OGD) on organotypic hippocampal slice cultures (OHSC) from 1 week-old Sprague-Dawley rats. Propidium iodide (PI) fluorescence-stained neuronal dead-cell areas, area percentages and TUNEL-positive apoptotic cells in CA1 and dentate gyrus, and LDH levels in culture media of the OHSC were measured following Bupleuri Radix extract treatment. Result : The following results were obtained: (1) The $5\;{\mu}g/ml$ of Bupleuri Radix treatment demonstrated a significant decrease in PI fluorescence-stained neuronal dead-cell areas and area percentage in CA1 region of the OHSC from 18 hrs to 48 hrs following the OGD. The $50\;{\mu}g/ml$ of Bupleuri Radix treatment was also significant from 6 hrs to 48 hrs following the OGD and was more effective. (2) The 5 and $50\;{\mu}g/ml$ of Bupleuri Radix treatment demonstrated a significant decrease in PI fluorescence-stained neuronal dead-cell areas and area percentage in DG region of the OHSC from 6 hrs to 48 hrs following the OGD. The $50\;{\mu}g/ml$ treatment was more effective than the $5\;{\mu}g/ml$ treatment. (3) Bupleuri Radix treatment demonstrated a significant decrease in TUNEL-positive apoptotic cells in CA1 region (with 5 and $50\;{\mu}g/ml$) and in DG region (with $50\;{\mu}g/ml$) of the OHSC damaged by the OGD. (4) Bupleuri Radix treatment demonstrated a significant decrease in LDH concentrations in culture media of the OHSC damaged by the OGD. Conclusion : These results suggest that Bupleuri Radix has neuroprotective and control effects on inflammatory and immune responses where there has been ischemic damage to the central nervous system.

한·양방 협진의 실태 및 문제점과 나아가야 할 방향

이원철(Won-Chul Lee) 대한한의학회 1999 대한한의학회지 Vol.20 No.2

대도시 수변공간의 친수성 평가체계에 관한 연구

이원철(Lee, Won-Chul),박찬돈(Park, Chan-Don) 한국주거환경학회 2014 주거환경(한국주거환경학회논문집) Vol.12 No.3

Recently, light is shed on the value of waterfront space in the respect of being capable to activating a city from the viewpoint of sustainability. Accordingly, the related research, policy-making, development, etc. is actively in progress at this time. However, the conventional evaluation system of waterfront space had a certain problem with waterfront space development plan and strategy. And it was difficult to understand what was a solution to improve this. Therefore, it is necessary to establish an evaluation system which can consider how proper planning items can be applied to the strategy of improving waterfront space in the comprehensive aspect. Hence, this study was carried out in order to present a scheme of waterfront space improvement strategy and plan available for activating a city in the future, by deriving an evaluation system of waterfront space improvement strategy and planning items for activating the city, and by applying the evaluation system to an actual targeted site in Korea. As a result, the evaluation system was established with 5 categories and 24 detailed planning indexes. And an attempt was made to evaluate an example of Korean waterfront space development by applying weight through ANP. It is a thought that waterfront space improvement strategy and planning items derived through the results of this study can be more easily used for a new development of waterfront space in the future, or the maintenance of waterfront space which has been already developed. These can be also utilized as baseline data through a decision can be easily made by the central government, municipality, and the corresponding local residents that are the various subjects that should make an effort to activate waterfront.

일개 권역응급의료센터에서의 중증 외상환자의 전원 현황과 문제점

이원철 ( Won Chul Lee ),조충현 ( Choong Hyun Jo ),정경원 ( Kyoung Won Jung ),민영기 ( Young Gi Min ),최상천 ( Sang Cheon Choi ),김기운 ( Gi Woon Kim ),안정환 ( Jung Hwan Ahn ),정용식 ( Yong Sik Jung ),황선애 ( Sun Ae Hwang ),김지 대한외상학회 2010 大韓外傷學會誌 Vol.23 No.1

Purpose: Trauma is one of the leading causes of death, especially among young people. Life-threatening conditions are very common in multiple-traumatized patients due to concurrent multi-organ injuries. Treating such severely injured patients is time critical. However, in Korea, the transfer of severely injured patients is not uncommon due to the lack of a mature trauma care system. In developed countries, the preventable trauma death rate is very low, but the rate is still very high in Korea. This study`s objective was to demonstrate the current serious state in which severely injured patients have to be transferred from a Regional Emergency Medical Center even though it actually serves as a trauma center. Methods: Ajou University Medical Center is a tertiary hospital that serves as a trauma center in Gyeonggido. The medical records at Ajou University Medical Center for a 1-year period from January 1, 2008, to December 31, 2008, were retrospectively reviewed. A severely injured patient was defined as a patient who showed more than 15 point on the ISS (injury severity score) scale. We investigated the clinical characteristics of such patients and the causes of transfer. Results: Out of 81,718 patients who visited the Regional Emergency Medical Center, 19,731 (24.1%) were injured patients. Among them, 108 severely-injured patients were transferred from one Regional Emergency Medical Center to other hospitals. The male-to-female ratio was about 3.5:1, and the mean ISS was 23.08. The most common mechanism of injury was traffic accidents (41.7%). A major cause of transfer was the shortage of intensive care units (44.4%); another was for emergent operation (27.8%). Most of the hospitals that received the severely-injured patients were secondary hospitals (86.1%). Conclusion: Although the Regional Emergency Medical Center played a role as a trauma center, actually, severely-injured patients had to be transferred to other hospitals for several reasons. Most reasons were related with the deficiencies in the trauma care system. If a mature trauma care system is well-organized, the numbers of transfer of severely injured patients will be reduced significantly. (J Korean Soc Traumatol 2010;23:6-15)

폴리 ( 프로파길 페닐 에테르 ) 의 합성과 그 특성에 관한 연구

이원철(Won Chul Lee),갈영순(Yeong Soon Gal),류문삼(Moon Sam Ryoo),한성호(Sung Ho Han),최삼권(Sam Kwon Choi) 한국고분자학회 1991 폴리머 Vol.15 No.3