초기 수직반사음의 역할을 고려한 새로운 명료도 지표

박종영(Park, Jong Young),한명호(Han, Myung Ho),정대업(Jeong, Dae Up),오양기(Oh, Yang Ki) 한국생태환경건축학회 2007 한국생태환경건축학회 논문집 Vol.7 No.3

SPS의 보호동작과 우리나라 계통보호설비 현황

박종영(Jong-young Park),박종근(Jong-keun Park),추진부(Jin-bu Chu),장병태(Byung-tae Jang),강계희(Gye-hee Kang),양정재(Jung-jae Yang) 대한전기학회 2002 대한전기학회 학술대회 논문집 Vol.2002 No.7

생물리학적 푸로필을 이용한 태아안녕의 평가

박종영(JY Park),박용원(YW Park),서경(K Seo),박찬규(CK Park) 대한산부인과학회 1989 Obstetrics & Gynecology Science Vol.32 No.7

1988년 3월1일부터 1988년 10월31일까지 만 8개월간 연세대학교 의과대학부속 세브란스병원 산부인과에서 진료받은 고위험임신군 114명을 대상으로 BPS를 시행하여 다음과 같은 결론 은 얻었다. 1. 대상으로한 고위험임신 114예중 40예에서 비수축성 자궁검사 결과가 무반응였으며 반응 성을 보인예는 74예이었다. NST에서 무반응성을 보인 40예에서 5분 Apgar치 <7, 태아곤란 증, 호흡곤란증후군발생 통계학적으로 의의있게 증가하였다. 2. NST와 BPS의 상관관계를 보면, 초음파를 이용한 4가지 변수의 결과가 정상인 69예중 20 예에서 NST가 무반응성이었으며 3가지 변수만 정상이었던 36예중에서는 14예서 2가지 변수 만 정상이었던 6예엇는 3예에서 1가지 변수만 정상이었던 경우는 무반응성 NST를 보여 BPS의 높은 신뢰도를 보여주고 있다. 3. BPS결과를 보면 6예에서 비정상 17예에서 equivocal (BPS=6), 91예에서 정상이었다. 비정 상 BPS결과를 보인 6예에서 정상 BPS를 보인 91예에서보다 신생아 이환율을 나타내는 지 표중, 태아곤란증, 5분 Apgar 치 <7, 호흡곤란증후군 발생빈도가 의의있는 증가를 보였는데 이중 5예(83%)에서 5분 Apgar치가 7미만으로 가장 높은 빈도수를 나타내었다. 4. 주산기이환율을 나타내는 지표중 태아곤란증, 5분 Apgar치, 호흡곤란증후군을 기준으로한 진단정확도를 조사하면, 1) NST의 특이도는 81%로 BPS의 특이도 98%보다 낮았으며, 민감도는 76%로서 BPS의 민 감도55%보다 높앗다. 2) BPS의 위양성율은 16%로서 NST위양성율 46%보다 통계학적으로 의의잇는 낮은 결과를 얻었다. 3) BPS의 양성에측율은 83%로서 NST의 53%보다 높았으며 음성예측율은 95%로서 NST의 음성예측율 92%보다 높은 결과를 얻었다. 1. In 40 cases of NST non-reactive high risk pregnancy, statistically significantly increase in the incindence of fetal distress 5 minute Apgar score <7 and the respiratory distress syndrome compared to the NST reactive group was observed. 2. Of 69 instances with four normal variables of BPS, 20(29%) instances had non-reactive NST. and there were 14(39%) instances of non-reactive NST among 36 instances associated with normal variables of three. Of 6 cases of two normal variables 3(50%) cases had non-reactive NST and in 3cases with one normal variable all showed non-reactive NST 3. All six cases with abnormal BPS group showed statistically significantly increase in the incindence of fetal distress, low 5-minute Apgar score, respiatory distress syndrome 4. Diagnostic accuracy of BPS in the prediction of perinatal morbidity based on fetal distress , 5minute Apgar score <7, respiratory distress syndrome were as following. Specificity = 98%, Sensitivity=55% False positive rate = 16%, False negateive rate =4.3%. positive predictive value = 83% negateive predictive value = 95% From this study , BPS test is currently useful in the prediction of perinatal morbidity in high risk pregnancy

원저 : 지방도시 공공병원과 민간병원 내원환자의 의료서비스 만족도 차이분석

박종영 ( Jong Young Park ),한성현 ( Sung Hyun Han ) 대한보건협회 2006 대한보건연구 Vol.32 No.1

지방의료원의 재무성과 영향요인

박종영 ( Jong Young Park ) 한국병원경영학회 2007 병원경영학회지 Vol.12 No.3

This paper aims at suggesting several ways to change financial vulnerability and to improve managerial capability of local public hospitals (LPHs) in Korea through the identification of factors affecting profitability. Several findings of the research are as follows: To begin with, LPHs exhibited a statistically significant difference in their profitability from one another, according to the analyses of their profitable margins from the general characteristics. It depends on the number of hospitals in the area, the population of the hospital-built area, the number of competing hospitals, the number of staff per 100 beds, the opening of special clinic, the educational function, and the capacity of rooms. However, there was no variable in the managerial characteristics, presenting a significant difference, in contrast with hospitals which have been managed by private companies and made a great amount of profits. Second, according to the analyses of profit differences in behavioral effort-characteristics, a statistically significant difference was revealed upon the basis of the efforts to improve the clinic service, invite special patients, and shorten the period of being hospitalized. Third, the result of analyses about the difference of profitability from medical care and finance is statistically significant in the rate of labor cost, the rate of management cost, bed-occupancy rate, and the period of being hospitalized. Fourth, according to the analyses of the factors influencing the net profit ratio of the entire capital, Adjusted explanatory power(Adjusted R2) was shown up to 65.2%, which is high. To compare the adjusted explanatory power stage by stage, the first stage model applying only two variables such as structural and strategic characteristics exhibited 23.8%, and the second stage model adding financial characteristics showed 51.5%. The explanatory power was much improved up to 65.2% when the third stage model incorporated the outcome of medical care performance. When the return on investment(ROI) was examined by using the multivariate linear regression analysis at the final model of third stage, it was found that ROI had a positive relationship with the increase rate of patients, labor costs per doctor, and medical care rate of socially protected inpatients. However, it revealed that ROI had a negative relationship with the ratio of labor costs, the number of patients per managerial staff, and occupancy rate of rooms, respectively. The research suggests that in order for LPHs to increase profitability, LPHs should make efforts not only to attract patients to the hospitals without any discrimination of the patients depending on their financial status, but also to develop efficient management methods to reduce labor costs.

커패시터의 최적 스케줄링을 고려한 ULTC의 협조 제어

朴鍾泳(Jong-Young Park),南淳烈(Soon-Ryul Nam),朴鍾根(Jong-Keun Park) 대한전기학회 2006 전기학회논문지A Vol.55 No.6

This paper proposes a coordinated control method for under-load tap changers (ULTCs) with shunt capacitors to reduce the operation numbers of both devices. The proposed method consists of two stages. In the first stage, the dispatch schedule is determined using a genetic algorithm with forecasted loads to reduce the power loss and to improve the voltage profile during a day. In the second stage, each capacitor operates according to this dispatch schedule and the ULTCs are controlled in real time with the modified reference voltages considering the dispatch schedule of the capacitors. The performance of the method is evaluated for the modified IEEE 14-bus system. Simulation results show that the proposed method performs better than a conventional control method.

[미발표]鐵道安全法 改定(案)의 시스템엔지니어링的 硏究

박종영(Jong Young Park),이성권(Sung Kwun Lee),고재현(Jae Hyun Ko),이현주(Hyun Ju Lee) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5

본 연구의 목적은 철도안전법 개정(안)을 시스템엔지니어링 관점으로 분석하는 데있다. 철도차량의 안전성 검증체계 개편은 철도차량의 제작과 유지보수, 운영 전 단계에 걸쳐 사후적 안전관리를 예방적·상시적 안전관리체계로 전환하는 것으로 이는 SE(Systems Engineering)의 전체론적 관점을 적용했다고 볼 수 있다. 또한 철도차량의 형식승인 제도 도입을 통해 철도차량 제작 시 생산단계 이전의 설계도면에 대해 정부가 규정한 철도기술기준에 부합하는지 여부에 대해 전문 승인기관의 형식승인을 받도록 되어있는데 이는 SE수명주기 프로세스 관점에서 철도차량의 제작을 승인하고 검증하겠다는 의도로 보인다. 우선, 철도안전법 개정 전·후 법안들을 비교 분석한 후 철도안전법 개정(안)에 내재되어있는 SE 적용 사례를 조사하여 향후 철도안전법 개정 시 SE 기법의 확대 적용을 제안하고자 한다. The purpose of this study is to analyze Korean Railroad Safety Act revision(Bill) by applying the Systems Engineering. Revision of safety verification system of rolling stock applied a holistic viewpoint of SE(Systems Engineering). It is to be switched from follow-up service to preventive management. This revision act(bill) specifies a railroad control right and includes railroad safety regulations that were separated from the urban railroad. Also, It is included approval of the Special Approval Authority whether rolling stocks design corresponds with railroad standards defined by government, in order to prevent problems by design verification shortages. In this paper, We analyzed before and after revision in the Railroad Safety Act and look up the application example in the systems engineering. Also, We proposed stretching the technique of the systems engineering when amending the Act and promoting railroad business.

산란시기의 칼납자루 Acheilognathus koreensis(잉어과)의 배측융기와 산란관의 구조

박종영 ( Jong Young Park ),김익수 ( Ik Soo Kim ) 한국어류학회 2006 韓國魚類學會誌 Vol.18 No.1

기상분사용 LPG 기화기의 유량 및 압력특성에 대한 실험적 연구

박종영(Chongyoung Park),이범호(Beomho Lee),조승환(Shengwhan Cho),이대엽(Daeyup Lee),이병직(Byongjik Lee),최윤재(Yoonjae Choi) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-

In order to satisfy more stringent emission regulations, it is required to control the fuel supply system with higher accuracy for LPG vehicles. Vaporizer, which is one of the important core parts in gaseous LPG injection system, functions not only to evaporate an LPG fuel and its pressure. thus in this work, pressure drop across the vaporizer in a gaseous LPG vehicle was measured and analyzed. Pressure drop occurs through orifices of pressure regulator and flow meter. As expected, pressure drop depends on flow rate, which increases when the more fuel is needed to be injected. Although Pressure sensor helps engine computer calculate the accurate amount of injected fuel depending on fuel pressure, it may be necessary to understand the pressure drop as a function of flow rate and coolant temperature. In this work, an experimental study of flow rate and pressure drop across the vaporizer was carried out.

동탄성 계수와 재하시간과의 상관성 연구

박종영(Jong-Young Park),정갑철(Gab-Cheol Jeong),임정빈(Jeong-Bin Im) 한국소음진동공학회 2009 한국소음진동공학회 학술대회논문집 Vol.2009 No.4