헌법재판의 입법통제와 변형결정

김양균 한국공법학회 1997 公法硏究 Vol.25 No.1

USA Evidence on the Relation between Health Insurance, Outpatient Services and Inpatient Services for Children ACSC

김양균,성주호 한국보험학회 2004 保險學會誌 Vol.69 No.-

The purpose of the study is to identify influence of health insurance status on ambulatory care (outpatient) visits as primary care accessibility and on hospitalization as health outcome caused by lack of primary care accessibility, and to explore the factors affecting outpatient visits, hospitalization caused by lack of outpatient visits.One of indicators to identify the relationship between access to health care service caused by health insurance status and health service utilization is Ambulatory Care Sensitive Conditions (ACSC), which are conditions that when timely and effectively treated in the outpatient setting can help reduce the risk of hospitalizations by preventing onset of an illness. The study chooses ACSC to test the relationship the lack of primary care and hospitalization among diseases.We use the available recent health care survey data (i.e. 1996 Medical Expenditure Panel Survey; MEPS96). We find out the positive relationship between hospitalization and no health insurance, and the negative relationship between outpatient visit and no health insurance. This indicates that reducing accessibility for outpatient visit caused by no health insurance results in increasing hospitalization. Furthermore, this result strongly suggests that the uninsured children is actually not able to care in early disease stage so that they are likely to hospitalization when their disease was more sever and then they need long stay for cure. As a result, fortifying the accessibility to necessary health care in a way of sharing appropriately the role with private health insurance can lead to the efficiency of national health care delivery systems in view of total health care expenditure, in particular in a case of ACSC children. Additionally, this kind of health policy may be expected to reform gradually the population structure such as aging, aged and super-aged society. 본 연구는 미국 의료심사원에서 공표한 실제데이터(MEPS96)를 의료보험통계분석 소프트웨어인 SUDAAN에 적용하여 심각한 질병상태는 아니지만 통근치료가 필요한 질환상태 ACSC(Ambulatory Care Sensitive Conditions: 중이염, 세균감염, 피부염, 위장염 등)에 있는 18세 이하 어린이들의 외래통근치료 빈도, 입원 빈도 및 평균 입원 일수 등을 종속변수로, 이에 영향을 미치는 주요 경제적 요인(사보험가입 여부, 국영보험가입 여부, 가정의 여부, 주거지역 등), 인구통계적 요인(연령, 인종, 성별) 그리고 건강상태(건강체, 표준체, 미달체 등) 등을 독립변수로 두어, 다변량분석 및 다중회귀분석을 수행함으로써 이들간의 상호 인과 관련성을 검증하였다. 우리는 민영건강보험시장 및 국민건강보험의 발전 방향 수립에 참조가 될 수 있는 다음과 같은 주요 시사점들을 도출하였다: 첫째, 사보험가입상태, 국영보험가입상태 및 비보험상태 순으로 외래통근치료 빈도와 양의 상호관련성이 높았으며, 둘째 입원 빈도와 평균입원 일수 등은 모두 외래 통근 치료 빈도와 음의 상호관련성이 있으며, 셋째 유아기(0세-5세) 는 청소년기(6세-18세)에 비하여 공통적으로 통근치료 빈도, 입원 빈도 및 평균입원일수 모두 높음을 알 수 있다. 특히 유아기의 입원빈도 및 평균입원일수는 청소년기에 비해 약 3배 이상 높게 산출되고 있다. 이는 생명표상에 유아기 사망률이 높게 나타나고 있음과 깊은 상관관계가 있음을 시사한다. 따라서 국민건강보험 및 민영건강보험의 보험적용범위를 유아기 질병 조기진단 방향으로 확대 적용할 필요성이 있으며, 이는 궁극적으로 질병악화로 인한 고액 의료비 지출을 조기에 차단하는 재정안정화 효과와 더 나아가 인구구조의 고령화 속도를 지연하는 간접적 효과를 기대할 수 있을 것이다. 이에 대한 국내 실증적 분석은 향후 연구과제로 두고자 한다.

지방공사의료원 규모의 효율성이 수입과 비용에 미치는 영향에 관한 연구

김양균,한보라 한국보건행정학회 2005 보건행정학회지 Vol.15 No.2

This study has two different objectives. First of all is to comparing results of size efficiency scoring on Public Corporation Medical Center(PCMC) by years of 1993, 1997 and 2003 using Data Envelopment Analysis(DEA). The second is to explore the relationship between revenue and PCMCs' efficiency score, and the relationship between expenses and the efficiency score in 2003. The average efficiency scores were significantly decreased by years of 1993, 1997 and 2003. The revenue per bed(revenue) in 2003 was smaller than the expenses per bed(expenses) in 2003, therefore PCMCs had deficits in 2003. The expenses was negatively related to the efficiency score. Therefore its means was that improving efficiency score decreased expenses. Contrarily, the revenue had any significant relation to the efficiency score. PCMC needs to various endeavors to improve their productivity and efficiency. One of the alternatives is reduce of work load through integration of PCMC and development of new performance index reflecting their situation and future direction.

머신러닝을 이용한 터널발파설계 자동화를 위한 기초연구

김양균,이제겸,이승원,Kim, Yangkyun,Lee, Je-Kyum,Lee, Sean Seungwon 한국터널지하공간학회 2022 한국터널지하공간학회논문집 Vol.24 No.5

As many tunnels generally have been constructed, various experiences and techniques have been accumulated for tunnel design as well as tunnel construction. Hence, there are not a few cases that, for some usual tunnel design works, it is sufficient to perform the design by only modifying or supplementing previous similar design cases unless a tunnel has a unique structure or in geological conditions. In particular, for a tunnel blast design, it is reasonable to refer to previous similar design cases because the blast design in the stage of design is a preliminary design, considering that it is general to perform additional blast design through test blasts prior to the start of tunnel excavation. Meanwhile, entering the industry 4.0 era, artificial intelligence (AI) of which availability is surging across whole industry sector is broadly utilized to tunnel and blasting. For a drill and blast tunnel, AI is mainly applied for the estimation of blast vibration and rock mass classification, etc. however, there are few cases where it is applied to blast pattern design. Thus, this study attempts to automate tunnel blast design by means of machine learning, a branch of artificial intelligence. For this, the data related to a blast design was collected from 25 tunnel design reports for learning as well as 2 additional reports for the test, and from which 4 design parameters, i.e., rock mass class, road type and cross sectional area of upper section as well as bench section as input data as well as16 design elements, i.e., blast cut type, specific charge, the number of drill holes, and spacing and burden for each blast hole group, etc. as output. Based on this design data, three machine learning models, i.e., XGBoost, ANN, SVM, were tested and XGBoost was chosen as the best model and the results show a generally similar trend to an actual design when assumed design parameters were input. It is not enough yet to perform the whole blast design using the results from this study, however, it is planned that additional studies will be carried out to make it possible to put it to practical use after collecting more sufficient blast design data and supplementing detailed machine learning processes.

개방 공간에서 발생하는 수소-공기 혼합 가스 폭연에 대한 실험적/해석적 연구

김양균,박병직,Kim, Yangkyun,Park, Byoung Jik 한국안전학회 2021 한국안전학회지 Vol.36 No.1

Experimental and analytical investigations are performed to explore the explosion characteristics of a hydrogen-air mixture in open atmosphere. A hydrogen-air mixture tent of total volume of 27 m³, with 40% hydrogen volume, is used to observe overpressure at a distance from the ignition source. Vapor cloud explosion analyses are performed using the TNO multi-energy model and Baker-Strehlow-Tang model. The results of these analyses are compared with experiment done from this study and references. The experimental results with and without obstacles indicate that the overpressure values measured at a distance of 4.5-21.5 m from the ignition source are about 9.4-3.6 kPa and 6.5-2 kPa, respectively. This implies that the overpressure with obstacles is approximately 1.7 times greater than that without obstacles. Analytical observation indicates that the results obtained with the Baker-Strehlow-Tang model with M_f = 0.2-0.35 are in good agreement with those of most of the previous studies, including that obtained from this study. Moreover, the TNO multi-energy model with a volume of 27 m³ well predicts the overpressure obtained from this study. Further studies should considered explosions in semi-confined spaces, which is more suitable for hydrogen refueling stations.

交通騷音의 現況과 그 低減對策

金良均,Kim, Yang-Kyun 한국음향학회 1990 韓國音響學會誌 Vol.9 No.2

소비가치 이론을 이용한 의료소비자의 의료기관 선택 요인 분석: 의원 및 중소병원과 전문중소병원과 전문병원,의원 및 중소병원과 종합전문요양병원(대학병원)을 중으로,

김양균,오영인,김준석 한국품질경영학회 2009 한국품질경영학회 학술대회 Vol.2009 No.2

내분비-대사 : HLA DRB1*0406와 연관된 자가면역성 저혈당증

김양균,박지윤,권미광,이상열,전숙,정인경,오승준,안규정,김덕윤,정호연,우정택,김성운,김진우,김영설 대한내과학회 2010 대한내과학회 추계학술대회 Vol.2010 No.-

물 분무 소화설비 성능검토를 위한 수치해석 연구

김양균,유용호,박진욱,박병직,김휘성 한국자원공학회 2017 한국자원공학회지 Vol.54 No.6

본 연구에서는 대심도 복층터널 방재에 사용되는 물 분무 소화설비의 체계적인 성능검토를 위해 수치해석을 이용하였다. 선택된 수치해석 기법은 2차원 Eulerian 다상유동 모델이고 수치해석 기법의 검증을 위해 운동량 방정식 및 물 분무 실물시험값을 이용하였다. 수치해석 결과 적용된 모든 노즐 출구 압력에서 물의 체적분율은 0.5를 넘지 않 았다. 또한 물의 분사각도가 없는 경우는 노즐의 출구압력이 증가함에 따라 바닥에 퍼지는 물의 체적분율이 증가하였 지만 물의 분사각도가 올라가면 노즐의 출구압력이 증가함에 따라 바닥에 퍼지는 물의 체적분율이 감소하였다. This paper describes numerical simulation on the water jet extinction system for systematical verification of its performance applied in double deck tunnel in great depth underground space. Numerical model applied is 2D Eulerian multiphase model, and its results are validated with the equation of motion and experiment. Simulation results show that water volume fraction is not over 0.5 in whole nozzle inlet pressure applied. Also, water volume fraction on the ground of tunnel is increased according to an increase in jet discharge pressure in case of 0° of jet inclination angle, while water volume fraction on the ground of tunnel is decreased according to an increase in jet discharge pressure in case of 5° and 11° of jet inclination angle.

豹菴 姜世晃의 《豹翁先生書畵帖》

김양균 동국사학회 2008 동국사학 Vol.45 No.-