Park's Vector Pattern의 왜곡률 분석에 의한 BLDC 모터의 권선 고장진단

이대성(Dae-Seong Lee),김준영(Jun-Yong Kim),양철오(Chul-Oh Yang),송명현(Myung-Hyun Song),박규남(Song, Kyu-Nam Park) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.7

Algal bioassay 에 의한 조류생장 제한영양염류 결정

오희목(Hee Mock Oh),이석준(Seog June Lee),김성빈(Seong Bin Kim),박미경(Mi Kyung Park),윤병대(Byung Dae Yoon),김도한(Do Han Kim) 한국하천호수학회 1998 생태와 환경 Vol.31 No.2

Determination of Limiting Nutrient for Algal Growth by Algal Bioassay. Oh, Hee-Mock, Seog June Lee, Seong-Bin Kim, Mi- Kyung Park, Byung-Dae Yoon and Do-Han Kim (Environmental Microbiology Research Unit, Korea Research Institute of Bioscience and Biotechnology, Taejon 305-333, Korea and Water Resources Research Institute, Korea Water Resources Corporation, Taejon 305-390, Korea) Water quaiity and algal growth potential (AGP) using Microcystis aeruginosa were investigated from April to September 1997 in Daechung Reservoir. Secchi disk transparency was 1.1 m in August. Chlorophyll-a concentrations were higher than 10㎍/l at all samples. Total phosphorus concentration was in a range of 0.020∼0.027mg/l which is at the approximate value of 0.03 mg/l, the general critical level of eutrophication. These results indicate that Daechung Reservoir is in an eutrophic state except some temporary times and restricted sites. Phosphorus uptake rate of M. aeruginosa was higher in the water from the epilimnion than in the hypolimnion and also higher under light condition than under dark condition. Therefore, phosphorus uptake rate appears to depend on cellular phosphorous content and light condition, a meaning of endergonic process. Phosphorus was the most frequently limiting nutrient: phosphorus was limiting algal gowth in April and May, nitrogen, phosphorus and trace elements were the limiting factors for algae in August, and trace elements in September. If a fast growing alga, M, aeruginosa, is used as a test organism for assaying AGP, in vivo fluorescence instead of dry weight can be measured for algal biomass and incubation period can be reduced from traditional 14 days to 7 days.

스테이지 이동 반력에 의한 베이스 진동 저감기법 개발

박아영,김형기,권오영,홍성욱 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

A variety of precise stages are adopted for precise machinery. To secure vibration isolation, those precise stages are mounted on a heavy base structure supported by compliant springs. Then the base structure is often subjected to vibration due to the reaction force induced by the stage motion. This paper investigates the dynamic behavior of base structures as well as a vibration reduction technique. A 6 DOF dynamic model is established to investigate the vibration of positioning stage and base structure. A new input shaper is devised to eliminate both the residual vibrations in base structure. Simulations show that the proposed input shaper effectively remove the residual vibrations in base structure.

모 제약회사 근로자들의 직업성 천식 유병률과 약제 분말 노출수준

오성수,최용휴,김은아,이영목,장재길,유장진,박승현,김태균,정수영,김규상,강성규 大韓産業醫學會 2006 대한직업환경의학회지 Vol.18 No.2

목적: 제약회사에서 직업상 천식의 유병 규모를 파악하고 작업공정에 대한 작업환경 측정을 통해 제약회사의 약제 분말에 대한 노출수준을 평가하고자 하였다. 방법: 제약회사에서 약제 분말에 노출되는 근로자를 대상으로 천식을 선별하기 위하여 설문조사 및 진찰, 혈액검사, 폐기능 검사 그리고 피부단자시험을 실시하였고, 각 부서별 공정에 따라서 총분진과 항생제 또는 효소제 분말에 대한 작업환경 측정을 실시하였다. 직업상 천식이 의심되는 근로자에 대하여 기관지과민성에 대한 검사(메타콜린을 이용한 비특이 기관지유발시험)와 약제 분말 기관지유발시험을 실시하여 확진하였다. 결과: 설문조사 및 진찰에서 작업 관련 천식 증상이 있는 근로자는 11명(34.4%)이었고, 약제 분말을 이용한 피부단자시험에서 1+ 이상 반응을 보인 근로자 10명(31.2%)이었다. 비특이 기관지유발시험 결과 8명(25.0%)이 양성(PC20 ≤16 mg/ml)이었다. 약제 분말 기관지유발시험을 통해 직업상 천식으로 확진된 근로자는 5명(15.6%)이었다. 작업환경 측정에서 원료를 충진하거나 투입하는 작업 그리고 정립작업에서 약제 분말에 대한 노출이 많았다. 결론: 제약회사에서 직업상 천식은 주로 제조공정 중 약제 분말에 노출된 근로자에서 발생하여, 증상 및 직업성 천식의 유병률이 높았다. 따라서 원료를 충진 또는 투입하는 작업과 정립작업 등 제조과적에서 약제 분말 노출을 줄이기 위한 세심한 주의가 필요하여, 약제 분말을 취급하는 근로자에 대해서는 천식 증상 조사뿐 아니라 정기적으로 피부단자시험, 비특이 기관지유발시험 등을 실시하여야 할 것이다. Objectives: After the investigation of one worker with occupational asthma, we surveyed the preva- lence of occupational asthma and the exposure level of pharmaceutical dust of 32 workers in a pharmaceutical company. Methods: Thirty-two of the 90 employees participated in the survey which consisted of questionnaire, blood sampling, spirometry and skin prick tests with 8 common allergens as well as 9 antibiotics and 2 enzymes. Various indices of the working environment were also measured. Subjects who had a symptom suggestive of work-related asthma or positive skin prick test were further investigated by PC20 methacholine. Nine subjects who had a PC20 result of 16 mg/ml or less (n=7) or had work-related symptoms and positive skin prick test (n=2) were referred to undergo a specific bronchial provocation test to phar- maceutical dust in an academic allergic disease center. Results: Eleven of 32 workers (34.4%) had a work-related symptom suggestive of occupational asthma. Ten (31.2%) showed positive skin prick test. 8 (25.0%) had a PC20 result of 16 mg/ml or less (indicative of significant bronchial hyperresponsiveness), and 5 (15.6%) had a positive result on the specific bronchial provocation test. Exposure levels of stuffing, input of raw materials and screening process were relatively high. Conclusions: This survey showed that pharmaceutical workers have an increased risk of occupational asthma. Although pharmaceutical factories maintain a relatively good working environment, careful control of respiratory tract exposures, especially during stuffing, input or raw materials and screening process, is important to prevent occupational asthma. Pharmaceutical workers need to undergo regular skin prick and methacholine bronchial provocation tests, as well as asthmatic symptom survey, to ensure the early detection and prevention of occupational asthma.

GIS를 위한 홍수유출해석에 관한 연구

박준일,함계운,성오경,장영태,김경훈 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-

In the rainfall-runoff simulation, it is crucial problem to extract the hydrologic topographical factors that are used as the model input parameters. Those factors are drawn out from DEM(Digit a1 Elevation Model) along with GIS(Geographic Information System) techniques represent a wide range of topographical informations. GIS is employed to estimate the parameters and examine application. Also, the results from different GIS data and analysis methods are examined. In the study, spatial data are calculated using WMS(Watershed Modeling System) v.6.1, which is hydrologic analysis software coupled with GIS, and flood analysis is accomplished by HEC-1 included in WMS, and applied to Dukchon River basin. To calculate the effective rainfall CN values of NRCS are used. Clark, Snyder and NRCS methods are selected to derive unit hydrograph respectively. In addition, the characteristics of runoff responses according to the selection of GIS spatial data for NRCS CN, TIN or Grid used to extract hydrologic topographical informations. and the number of partitioning sub-basin are investigated.

기관골 신생증 1예

오영상,이은우,정종혁,문승원,김수현,김동한,양혁승,박정환,박경옥,강성수,이영직 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Tracheobronchopathia osteoplastica is a rare disorder of unknown cause characterized by the projection of numerous bony or cartilaginous submucosal nodules into the tracheobronchial lumen with sparing of the posterior membranous portion of tracheobronchial tree. In the past, most of the cases were diagnosed as secondary finding at autopsy. Nowaday, the key component of the evaluation is flexible fiberoptic laryngoscopy and bronchoscopy, which typically demonstrates irregular spicules of subrnucosal bone and cartilage projecting into the tracheobronchial lumen and causing various degrees of airway obstruction. A 45 years old man was visited Sunchon St. Carollo hospital due to discomfort on throat. We saw several nodules just below vocal cord via laryngoscope. The computed tomography revealed multiple small calcified nqdules on trachea and both main bronchi. Pathologic finding of bronchoscopic biopsy showed abnormal proliferation of bony and cartilagious nodules in the tracheal submucosa. These fingdings were consistent with tracheobronchopathia osteoplastica. We report here on a case of tracheobronchopathia osteoplastica with review of literature.

장시간 불가피한 공복(fasting)후 인체의 내분비 변화 : 삼풍백화점 붕괴 사고후 구조된 3인의 증례 THREE CASES IN COLLAPSE OF SAMPOONG DEPARTMENT STORE

박규남,황주일,박조현,오동렬,이원재,오승택,김세경,김인철 대한응급의학회 1995 대한응급의학회지 Vol.6 No.2

The interactions between nutrition and the endocrine system are more intimate and complex that previously thought. Nutrition modulates secretion and activity of many hormones, as part of the stress adaptation process. Fasting, in particular, produces a number of important changes in the endocrine system, with teleological purpose of helping the body tolerate the lack of food ingestion. These changes are therefore beneficial and protective, although at times they may not appear to be that way. The endocrine changes of fasting mediate the metabolic response. We must emphasize that these changes are completely reversible when appropriate nutrition is established. These changes are as followes: 1) decreased insulin and increased glucagon levels, 2) decreased thyroid effect, 3) decreased sympathetic activity, 4) hypothalamic hypogonadism, 5) decreased growth, 6) altered glucocorticoid secretion and metabolism, 7) impaired mineralocorticoid response, 8) decreased ADH secretion and effect. We experienced three cases of involuntary prolonged fasting after collapse of Sampoong department store. They were released from collapsed field after 11(case Ⅰ), 13(case Ⅱ), 17days(case Ⅲ) respectively. In each case, the endocrine changes of plasma levels were as followes: decrease of cortisol in case Ⅰ, increase of GH in case Ⅱ, decrease of free T3, T3, cortisol and increase of reverse T3, insulin in case Ⅲ. Each one did not show the same endocrine changes of plasma levels. But we think these changes of fasting are beneficial in metabolic response of human.

MPEG-2 비디오 디코더(MP@HL)의 상위 레벨 설계에 관한 연구

박준호,오주환,천성권 경운대학교 산업기술연구소 2002 産業技術硏究論文誌 Vol.5 No.1(A)

In this paper, high level of MPEG-2 video MP@HL decoder is designed and follows ISO/IEC 13818-2 standard specification. MPEG-2 video decoder consists of system processign board, slice processign board, and motion processing board, which is compatible with MPEG-TS and MPEG layer-2. Each board represents schematic level design and external interface.

노사관계 선진화를 위한 기업윤리 제고 방향

오영환,박성규 聖心女子大學校 社會科學硏究所 1992 社會科學硏究 Vol.8 No.-

Flumazenil의 투여 방법에 따른 혈장내 농도와 midazolam에 의해 유도된 진정 상태의 환원 효과

박성규,이상호,이창섭,이난영,오유향 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.3

Flumazenil의 투여 방법에 따른 혈중 농도와 midazolam에 의해 유도된 진정 상태의 환원 효과를 평가하기 위해 23-25세의 학생을 대상으로 비강으로 midazolam을 투여하여 진정시킨 후 flumazenil을 비강내과 정맥내를 통하여 투여한 다음 액체크로마토그래피(HPLC)를 사용하여 시간 경과에 따른 혈중 농도의 변화와 함께 생징후 및 진정 정도를 측정하여 flumazenil의 길항 효과를 다각적으로 분석, 평가하여 다음과 같은 결과를 얻었다. 1. Midazolam에 의한 진정 상태에서 flumazenil의 투여시 수축기 및 이완기 혈압, 동맥혈 산소포화도 등의 생징후는 변화가 없었으나 맥박은 일시적인 상승이 있었다(P<0.05). 2. Flumazenil은 비강내 투여 및 정맥내 투여 등 투여 방법에 관계없이 midazolam에 의한 진정 상태를 일시적으로 환원시키며 투여 방법에 따른 발현 시간의 차이는 없으나 환원 정도와 지속 시간은 정백내 투여에서 크게 나타났다(P<0.05). 3. Flumazenil의 비강내 투여는 최고 혈중 농도에 2분, 정맥내 투여는 4분 후에 각각 도달하므로써 흡수 속도는 비강내 투여와 정맥내 투여의 차이가 크지 않았다. 4. Flumazenil의 투여 후 수 분 동안 midazolam의 혈중 농도가 일시적으로 상승하였다(P<0.05). 이상의 결과를 종합하여 보면 flumazenil은 midazolam에 의한 진정 상태에서 생징후의 변화에 영향을 미치지 않으며 진정의 정도를 감소시키는 효과가 있고, 특히 비강내 투여는 정맥내 투여와 발현 시간에 있어서 차이가 없는 것으로 나타나 임상적으로 midazolam에 의 한 부작용 발현시 응급 처치법으로 유용하게 사용할 수 있을 것으로 사료된다. The purpose of this study were to evaluate the effect on the reversion of sedation induced by midazolam with flumazenil and to determine the plasma concentration of flumazenil according to the method of administration. Intranasal and intravenous flumazenil were administered to sedated health volunteers aged from 23 to 25 years, in doses typical of those used clinically to induce sedation with midazolam and for reversal with flumazenil. Objective assessment for degree of sedation and vital signs, plasma concentration were made for 2 hours period. 1. Systolic and diastolic blood pressure, SpO₂ were not changed by adminstration of flumazenil in sedated subject with midazolam, but pulse rate was increased temporarily. 2. Flumazenil showed the reversal of the sedative effect induced by midazolam regardless of administration methods. But intravenous administration showed more effect on the degree and the duration of reversion than intranasal administration with the exception of on set time. 3. Peak plasma concentration of flumazenil administered by intranasal route reached after 2 min and that of flumazenil administered by intravenous route was 4 min. Thus uptake of flumazenil did not showed any difference in accordance with the adminstration route. 4. Administration of flumazenil resulted in the temporary increase of midazolam plasma concentration.