'퇴원설명문'에 의한 72시간내 부적절한 응급센터 재방문의 감소

박하영,심민섭,송형곤,송근정,Park, Ha Young,Sim, Min Seob,Song, Hyoung Gon,Song, Keun Jeong 한국의료질향상학회 2006 한국의료질향상학회지 Vol.12 No.1

Background : Patients who were discharged from the emergency department(ED) may revisit. These patients are divided into two groups; one is expected scheduled condition, the other is unexpected condition. These patients of inappropriate revisits to the ED would be unsatisfied, difficult to make rapport and take legal action as a result of additional medical charges. The purpose of this study was to reduce inappropriate revisits to the ED with a new method which was developed by analyzing inappropriate revisits in 2002. Methods : This study was conducted in a tertiary hospital consisting of 1,278 beds. The most common cause of inappropriate revisits was the medical team's lack of explanation about a disease. Thus we decided that the effective method was to offer full explanations to patients to understand the clinical pathway of a disease. We made four types of stickers to explain most common 4 diseases in 2003. An emergency physician completed 'discharge explanation report' and explained it to patients in 2004. Results : In 2002 inappropriate revisited patients were 164, patients with four diseases were 79. During the same period of 2003, inappropriate revisited patients were 56 (-65.9%), four disease patients were 6 (-92.4%) and in 2004 inappropriate revisited patients were 52, four disease patients were 19. Causes of revisits were lack of explanation about a disease in 35 patients (44.3%) in 2003, and 5 patients (83.3%) in 2003, and 16 patients (84.2%). Conclusions : Application of 'explanation stickers' at discharge reduced inappropriate revisits from 34.5% in 2002 to 15.9% in 2003. Application of 'Discharge explanation report' by emergency physician reduced inappropriate revisits from 15.9% in 2003 to 13.5% in 2004. Reduction of inappropriate revisits elevated the quality of medical treatment, and decreased patients' dissatisfaction in ED.

무선 ad hoc 망에서 QoS 보장을 위한 가변 우선순위 MAC 프로토콜

박하영,김창욱,한정안,김병기,Park, Ha-Young,Kim, Chang-Wook,Han, Jung-Ahn,Kim, Byoung-Gi 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.7b

Ad hoc 무선망의 동적인 특성으로 인하여 히든노드 문제가 나타날 수 있기 때문에 ad hoc 무선망에서는 분산방식으로 네트워크가 동작되어야 한다. Ad hoc 무선망에서 CSMA/CA는 비동기적 데이터 트래픽을 위해 가장 많이 사용되는 MAC Protocol 중의 하나이다. 그러나 CSMA/CA는 멀티미디어 데이터의 특성을 보장하지 못한다. 또한 경쟁형(Contention)이므로 채널을 먼저 잡은 하나의 스테이션이 채널을 독점해서 사용하여 채널 기아(starvation)로 인한 공평성문제(fairness problem)가 발생한다. 본 논문에서는 무선 ad hoc망에서 멀티미디어 데이터의 특성을 고려하여, QoS 보장을 위한 MAC protocol을 제안한다. Because of MANET's dynamic characteristic, the hidden node problem can happen. Thus it must use with distributed channel access. In Ad hoc networks, carrier sense multiple access with collision avoidance(CSMA/CA) is one of the most widely used medium access control(MAC) schemes for asynchronous data traffics. However, CSMA/CA could not guarantee the quality of multimedia traffics. CSMA is a contention based protocol. Therefor once a node gets a channel, it can momopolze. Thus the fairness problem with channel starvation will happen. We will propose a new MAC protocol to guarantee QoS for multimedia data in ad hoc networks.

한 도시 대학병원 자료를 이용한 입원환자의 의료서비스 이용량 변이에 관한 연구

박하영,신의철,맹광호,Park, Ha-Young,Shin, Eui-Chul,Meng, Kwang-Ho 대한예방의학회 1990 Journal of Preventive Medicine and Public Health Vol.23 No.4

The variation in resource utilization for hospitalized patients who had a group of similar diseases -- a Korean Diagnosis Related Group (KDRG) -- among the same type of hospitals was studied to assess the utillization variation due to the practice pattern of hospitals. Information about inpatients who were beneficiaries of the medical insurance for teachers and government officials discharged from 20 large university teaching hospitals in Seoul during 1986 and information about the hospitals were analyzed to achieve the study objective. A total of 20,223 non-outlier patients in 100 most frequent KDRGs were included in the analysis. Case charges after the review and length of stay (LOS) were used as measures of resource utilization during a hospitalization. A substantial variation among hospitals was found in most KDRGs : o the ratio of the maximum and the minimum among the mean case charges of hospitals was greater than 2 in 83 KDRGs ; o the difference between the maximum and the minimum among the mean case charges of hospitals was greater than 100,000 Won in 94 KDRGs : o the ratio of the maximum and the minimum among the mom LOS of hospitals was greater than 2 in 82 KDRGs ; o the difference between the maximum and the minimum among the mean LOS of hospitals was greater than 3 days in 94 KDRGs. The practice pattern of hospitals explained more than 20% of charge variation in 49 KDRGs and more than 20% of LOS variation in 43 KDRGs. The study results indicated need for a new health policy initiative for cost containment and quality assurance.

대학병원 의사들의 보상결정 기준으로서의 성과 측정지표에 대한 연구

박하영 ( Ha Young Park ) 한국보건행정학회 1999 보건행정학회지 Vol.9 No.2

논문 : 산성 표면절삭결함 제거 공정에 의한 실리콘 태양전지의 텍스쳐링 효과 개선

박하영 ( Ha Young Park ),이준성 ( Joon Sung Lee ),권순우 ( Soon Woo Kwon ),윤세왕 ( Se Wang Yoon ),임희진 ( Hee Jin Lim ),김동환 ( Dong Hwan Kim ) 대한금속재료학회 ( 구 대한금속학회 ) 2008 대한금속·재료학회지 Vol.46 No.12

Texturing for crystalline silicon solar cells is one of the important techniques to increase conversion efficiency by effective photon trapping. Generally, incoming wafers or alkali etched wafers are used for texturing. From this conventional etching process, 7~10 μm-sized random pyramids are formed. In this study, acid etching for removal of saw damages was practiced before texturing. This improved the resulting surface morphology, which consisted of 2~4 μm-sized pyramids. Because these pyramids covered the surface much more extensively, we obtained reduction of optical losses on the surface. In order to compare with conventional texturing, FE-SEM is used for observing surface morphology and reflectance data is analyzed by UV-VIS spectrophotometer.

병원시장의 경쟁특성과 병원행태

박하영 ( Ha Young Park ),권순만 ( Soon Man Kwon ),정영호 ( Young Ho Jung ) 한국보건행정학회 2008 보건행정학회지 Vol.18 No.1

H ow health care providers compete and how competition among them affects their behavior are crucial questions in theory and health policy. In ordinary markets, competition improves social welfare. However in health care markets facing uncertainty and information asymmetry, competition can take the form of wasteful quality competition and result in cost increase. The purpose of this study is to examine the characteristics of hospital service markets and examine the impact of hospital competition on hospital behavior, more specifically hospital cost and the size of personnel. Based on patient discharge data of 2002 by the Ministry of Health and Welfare and Korea Institute for Health and Social Affairs, and health insurance EDI claims data of 2002, this study measures the degree of competition in the inpatient service market of hospitals, using variable radius method and Herfindahl index. The result of the study shows that the hospital service market consists of on average 3.13 government administrative units(shi, gun, or gu). Compared with hospitals, general or general specialized hospitals cover larger markets and operate in more competitive markets. Nearly 60% of patients use hospitals, which are not located in their government administrative units, meaning that market definition based on variable radius is better than the conventional method of market definition based on government administrative units. The results of multivariate analysis show that competition is not associated with high cost index of hospitals. But hospitals in more competitive markets employ larger(more intensive) input of personnel per 100 beds, implying that hospital competition in Korea can have the form of quality and cost-increasing competition.

블록체인 기반 웹툰 플랫폼 BlockToon

박하영(Ha-young Park),전민준(Min-jun Jeon),이수현(Su-Hyun Lee) 한국컴퓨터정보학회 2019 한국컴퓨터정보학회 학술발표논문집 Vol.27 No.2

4차 산업혁명 시대에 떠오르는 기술인 블록체인과 블록체인의 단점을 보완할 수 있는 분산된 파일 시스템 IPFS을 활용하여 새로운 형태의 웹툰 플랫폼 서비스 BlockToon을 개발하였다. 본 논문에서 개발한 BlockToon은 중앙 서버가 웹툰 정보와 파일을 관리하는 것이 아닌 작가가 파일에 대한 정보를 블록체인과 IPFS에 자유롭게 등록, 관리한다. 블록체인 특성상 수정 및 삭제가 불가능하기 때문에 블록체인에 등록된 웹툰의 정보는 저작권 증명이 가능하다. 또한 주요 데이터를 중앙 서버에서 관리하지 않으므로 중앙 서버 유지비용이 절감된다.

수용전념치료(ACT) 프로그램 개발에 관한 연구동향 : 국내 학술지를 중심으로

박하영(Ha Young Park) 단국대학교 상담학연구소 2020 상담교육연구 Vol.3 No.2

본 연구 목적은 국내 수용 전념치료(ACT) 프로그램에 관한 연구 동향을 분석하여 향후 연구의 시사점을 제공하는데 있다. 이를 위해 한국교육학술정보원(RISS)에서 ‘수용전념치료프로그램’을 검색하여 한국연구재단(KCI)에 등재된 학술지 논문 32편을 대상으로 연구년도, 연구대상, 연구방법, 연구변인, 프로그램 개발 근거, 프로그램 회기 및 시간을 기준으로 분석하였다. 수용전념치료에 대한 연구는 2011년 처음 등장하였으며 2020년까지 꾸준히 연구 되었다. 연구대상은 대학생이 53.1%로 가장 많았다. 연구방법으로는 양적 연구 방법이 많이 사용되었고 연구 변인은 독립변인이 수용전념치료 프로그램이었고 종속 변인은 108개가 있었다. 프로그램 개발 근거로는 기존 프로그램 재구성이 가장 많이 쓰였고 프로그램 평균 8.3회기였고 시간은 120분이 가장 많이 쓰였다. 끝으로 연구의 향후 제언, 한계점, 의의를 논의하였다. Objectives: The purpose of this study is to provide implications for future research by analyzing domestic research trends on ACT(Acceptance and Commitment Therapy) programs. Methods: To this end, the phrase, Acceptance Commitment Therapy Program was searched on RISS(Research Information Sharing Service) and the 33 journal articles registered in KCI(Korea Citation Index) were selected. Then, they were analyzed based on the year of publication, study subjects, research scales, variables, the grounds programs were developed, program sessions and time. Results: The research on ACT(Acceptance and Commitment Therapy) first appeared in 2011 and continued to be conducted until 2020. The most common study subjects were university students with 53.1%. As the research method, quantitative research methods were widely used, and the most used independent variable was the acceptance and commitment therapy program, and there were 108 dependent variables. As the grounds for program development, the reorganization of the existing programs was most frequently used. The average duration of the programs was 8.3 sessions, and 120 minutes was the most used. Conclusions: Finally, the limitations, and implications of the study were provided with suggestions for future research.

Ad Hoc 환경에서 효율적인 패킷 충돌 제어기법

박하영(Ha-Young Park),김창욱(Chang-Wook Kim),박원길(Wean-Gil Park),김병기(Byoung-Gi Kim) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1A

무선 통신은 제한된 통신 자원으로 인한 제한된 대역과 단말기능에 있어서의 제약으로 무선 환경에서 제공받는 멀티미디어 통신 서비스를 수용하기가 쉽지 않다. 이러한 문제점을 해소하는 방안으로 무선 접속 기능을 향상하기 위한 통신장비간 무선 통신을 ad hoc 네트워크라고 부른다. 본 논문에서는 이러한 ad hoc 망상에서 CSMA을 이용한다. 그리고 ad hoc 네트워크의 히든노드(hidden node)문제를 해결하기 위하여 아주 작은 단위의 제어프레임을 사용하여 다음에 전송할 데이터패킷의 우선순의를 두고, 더 전송할 데이터패킷의 유무를 구분한다. RTS와 CTS를 전송하고 제어프레임을 받은 후 T-ready만큼 기다려, 새로운 최소 패킷을 받는 즉시 데이터패킷의 우선순위를 판단하여 우선순위가 높은 패킷일 경우에는 채널을 양보하므로 하나의 노드가 채널을 독점하는 기아 현상을 줄인다.

한국형 외래환자분류체계의 개선과 평가: 복수시술 및 항암제 진료와 내과적 방문지표를 중심으로

박하영 ( Ha Young Park ),강길원 ( Gil Won Kang ),윤성로 ( Sung Roh Yoon ),박은주 ( Eun Ju Park ),최성운 ( Sung Woon Choi ),유승학 ( Seung Hak Yu ),양은주 ( Eun Ju Yang ) 한국보건행정학회 2015 보건행정학회지 Vol.25 No.3

Background: Issues concerning with the classification accuracy of Korean Outpatient Groups (KOPGs) have been raised by provid-ers and researchers. The KOPG is an outpatient classification system used to measure casemix of outpatient visits and to adjust pro-vider risk in charges by the Health Insurance Review & Assessment Service in managing insurance payments. The objective of this study were to refine KOPGs to improve the classification accuracy and to evaluate the refinement. Methods: We refined the rules used to classify visits with multiple procedures, newly defined chemotherapy drug groups, and mod-ified the medical visit indicators through reviews of other classification systems, data analyses, and consultations with experts. We assessed the improvement by measuring % of variation in case charges reduced by KOPGs and the refined system, Enhanced KOPGs (EKOPGs). We used claims data submitted by providers to the HIRA during the year 2012 in both refinement and evaluation. Results: EKOPGs explicitly allowed additional payments for multiple procedures with exceptions of packaging of routine ancillary services and consolidation of related significant procedures, and discounts ranging from 30% to 70% were defined in additional payments. Thirteen chemotherapy drug KOPGs were added and medical visit indicators were streamlined to include codes for con-sultation fees for outpatient visits. The % of variance reduction achieved by EKOPGs was 48% for all patients whereas the figure was 40% for KOPGs, and the improvement was larger in data from tertiary and general hospitals than in data from clinics. Conclusion: A significant improvement in the performance of the KOPG was achieved by refining payments for visits with multiple procedures, defining groups for visits with chemotherapy, and revising medical visit indicators.