물분해용 Cu₂O 박막/ZnO 나노막대 산화물 p-n 이종접합 광전극의 광전기화학적 특성

박정환,김효진,김도진,Park, Junghwan,Kim, Hyojin,Kim, Dojin 한국재료학회 2018 한국재료학회지 Vol.28 No.4

We report on the fabrication and photoelectrochemical(PEC) properties of a $Cu_2O$ thin film/ZnO nanorod array oxide p-n heterojunction structure with ZnO nanorods embedded in $Cu_2O$ thin film as an efficient photoelectrode for solar-driven water splitting. A vertically oriented n-type ZnO nanorod array was first prepared on an indium-tin-oxide-coated glass substrate via a seed-mediated hydrothermal synthesis method and then a p-type $Cu_2O$ thin film was directly electrodeposited onto the vertically oriented ZnO nanorods array to form an oxide semiconductor heterostructure. The crystalline phases and morphologies of the heterojunction materials were characterized using X-ray diffraction and scanning electron microscopy as well as Raman scattering. The PEC properties of the fabricated $Cu_2O/ZnO$ p-n heterojunction photoelectrode were evaluated by photocurrent conversion efficiency measurements under white light illumination. From the observed PEC current density versus voltage (J-V) behavior, the $Cu_2O/ZnO$ photoelectrode was found to exhibit a negligible dark current and high photocurrent density, e.g., $0.77mA/cm^2$ at 0.5 V vs $Hg/HgCl_2$ in a $1mM\;Na_2SO_4$ electrolyte, revealing an effective operation of the oxide heterostructure. In particular, a significant PEC performance was observed even at an applied bias of 0 V vs $Hg/HgCl_2$, which made the device self-powered. The observed PEC performance was attributed to some synergistic effect of the p-n bilayer heterostructure on the formation of a built-in potential, including the light absorption and separation processes of photoinduced charge carriers.

사상의학적으로 치료하여 호전된 주요 신경인지장애 치험 2례

박정환,곽진영,고영미,윤지원,안택원,Park, Junghwan,Kwak, Jinyoung,Koh, Youngmee,Yun, Geewon,Ahn, Taekwon 대전대학교 한의학연구소 2017 혜화의학회지 Vol.26 No.1

Objectives:This study was designed to report treatment by Sasang Constitutional Medicine to the patients with Major Neurocognitive Disorder(Dementia) from various causes. Methods:These two patients were diagnosed as Taeeumin and Soyangin according to the result of Sasang constitutional diagnosis, and treated by Sasang constitutional medications. The progress was evaluated with the Korean version of Mini-Mentel State Exam(KMMSE) and Global Disorientation Scale(GDS). Result:The symptoms like wandering, insomnia, cognitive disorder was improved in these patients. Also, KMMSE and GDS score were highly improved. the one patient was cured with Cheongsimyeonja-tang and and the other was cured with Jihwangbaekho-tang and Yanggyuksanhwa-tang. Conclusion:This cases show that Sasang constitutional herbal medications are an effective treatment for the patients with Major Neurocognitive Disorder.

Acetaminophen(AAP)으로 유발한 간기능 저하 동물 모델에서의 비만 및 지질대사에 대한 영향 평가

박정환(Junghwan Park),김윤하(Yoonha Kim),곽진영(Jinyoung Kwak),홍서진(Seojin Hong),박정미(Jungmi Park),안택원(Taekwon Ahn) 대한한의학회 2016 대한한의학회지 Vol.37 No.3

버져닝 지원 해시 인덱스 기반 네트워크 키-값 스토어

박정환(Junghwan Park),박여현(Yeohyeon Park),김경표(Kyungpyo Kim),박성순(Sung-Soon Park),김영재(Youngjae Kim) 한국정보과학회 2023 한국정보과학회 학술발표논문집 Vol.2023 No.6

이동 통신망을 위한 도시지역에서의 위치 등록 발생율에 관한 연구

박정환(Junghwan Park),전민희(Minheui Jeon),차영환(Yeonghwan Tscha),이균하(Kyoon Ha Lee) 한국정보과학회 1993 한국정보과학회 학술발표논문집 Vol.20 No.1

이동 가입자(mobile station)에 대한 위치정보의 신속한 처리는 이동 통신망에 있어 필수적이다. 특히, 서울과 같은 대도시 지역에서의 이동 가입자의 빈번한 위치 이동은 트래픽의 폭주를 낳을 수 있기 때문에 위치정보의 신속한 처리를 위해 위치 등록기(location register)의 적절한 위치 선정이 중요하다. 본 논문에서는 도로를 중심으로한 정방형 형태의 도심지에 있어 이동 가입자의 트래픽 이동 형태를 반영한 위치 등록 발생률의 분석과 하나의 위치 등록기에 수용 가능한 위치 영역(location area)수의 산정과 이에 따른 위치 등록 발생률을 분석하였다. 분석 결과 본 연구에서 제안된 방법은 대도시 밀집지역에 있어 위치 등록기의 설치 위치 선정과 위치 등록 발생률의 예측에 매우 유용함을 알 수 있었다.

전기 자동차의 안정성 확보를 위한 배터리 관리 시스템의 절연 설계

박정환(Junghwan Park),차한주(Hanju Cha) 전력전자학회 2015 전력전자학술대회 논문집 Vol.2015 No.07

동양의 수도(修道)와 리터러시

박정환(Junghwan Park) 한국종교교육학회 2021 宗敎敎育學硏究 Vol.67 No.-

형사절차상 범죄피해자 정보권 인식에 관한 연구

박정환(Junghwan Park),장은지(Eunji Jang) 부경대학교 인문사회과학연구소 2023 인문사회과학연구 Vol.24 No.1

이 연구는 형사절차상 범죄피해자 정보권 보장의 한계를 분석하고, 현시점에서 적용 가능한 방안 가운데 정보권 인식 개선을 중심으로 개선 방안을 모색하는 데 목적이 있다. 범죄피해자 권리 보호를 주제로 연구를 수행한 기존의 연구들은 권리 보호 법령 및 정책의 문제점에서 시작하여 개선 방안을 도출하는 것까지 활발한 연구를 수행해왔다. 이러한 성과에도 불구하고 여전히 현장에서는 실효성 있는 대안이 되지 못하는 것이 아직까지 풀리지 않는 난제이다. 특히, 범죄피해자의 권리 가운데 ‘정보권’은 다양한 권리 가운데 가장 기본적인 권리라고 할 수 있다. 정보권을 충분히 보장받지 못한다면 다른 권리(가령 진술권, 참여권 등)를 보장받는 데 한계가 있을 수 있기 때문이다. 따라서 범죄와 관련한 당사자들의 입장에서도, 범죄사건을 처리하는 형사사법기관의 입장에서도 매우 중요하게 다뤄져야 할 부분이라고 할 수 있다. 따라서 이 연구는 범죄피해자의 권리보호가 실제 현장에서 효과적으로 발휘되기 위한 방안으로 ‘정보권 인식’에 초점을 둔다. 이를 위해 범죄피해자 정보권 보장과 관련하여 국내 법적 근거 및 지원정책의 한계를 지적하고 범죄피해자 정보권 보장을 위한 구체적이면서도 실현 가능한 인식 개선 방안을 모색하였다. 이 연구의 문제는 다음의 내용과 같다. 첫째, 현시점에서의 범죄피해자 정보권과 관련한 국내 법적 한계점은 무엇인가? 둘째, 범죄피해자 정보권 보장 문제를 해결하기 위한 구체적이면서도 실현 가능한 인식 개선 방안은 무엇인가? 연구결과, 범죄피해자 정보권과 관련된 여러 쟁점 가운데 논쟁이 되고 있는 한계점은 1. 사건기록 등에 대한 열람·등사 신청 문제, 2. 사건의 통지 문제, 3. 사건의 피해자 배제 문제, 4. 형사사법기관의 인식 부재 문제로 정리할 수 있다. 그리고 범죄피해자 정보권 보장을 위한 인식 개선 방안으로는 1. 형사사법기관 담당자 대상 범죄피해자 정보권 인식 개선 교육, 2. 잠재적 범죄피해자 대상 범죄피해자 정보권 인식 개선 교육을 제안하였다. The purpose of this study is to analyze the limitations of guaranteeing information rights of crime victims in criminal proceedings and to find ways to focus on improving awareness of information rights among the measures applicable at this point. Existing studies on the subject of protecting the rights of crime victims have been actively conducted from problems with the Rights Protection Act and policies to deriving improvement measures. Despite these achievements, there is still no effective alternative in the field. It is an unresolved conundrum. In particular, among the rights of crime victims, 'information rights' can be said to be the most basic right among various rights. This is because if the right to information is not sufficiently guaranteed, there may be limitations in securing other rights (e.g., the right to state, participate, etc.). Therefore, it can be said to be a very important part of the parties related to crime and the judicial institution dealing with criminal cases. Therefore, this study focuses on 'recognition of information rights' as a way to effectively exercise the rights of crime victims in the actual field. To this end, it pointed out the limitations of domestic legal grounds and support policies related to the guarantee of information rights for crime victims, and sought specific and feasible ways to improve awareness for guaranteeing information rights for crime victims. The problems of this study are as follows. First, what are the domestic legal issues related to the information rights of crime victims at this point?, Second, what are specific and feasible measures to improve the perception of crime victims' information rights guarantees? As a result of the study, among the various issues related to the information rights of crime victims, the controversial limitations can be summarized as 1. the problem of reading and copying case records, 2. the problem of notification of case, 3. the exclusion of case victims, and 4. the lack of awareness of criminal justice agencies. In addition, as a way to improve awareness of crime victim information rights, 1. Training to improve awareness of crime victim information rights for persons in charge of criminal justice agencies. 2. Education to improve awareness of crime victim information rights for potential crime victims has been proposed.

대한민국의 환경유전자 데이터베이스 플랫폼 시스템 구조 제안

박정환(Junghwan Park),김건희(Keonhee Kim) 전남대학교 수산과학연구소 2022 수산과학연구소논문집 Vol.31 No.2

퇴직연금 모집인을 활용한 가입자 교육 활성화 방안연구 - 생보사의 퇴직연금 모집인 중심으로 -

박정환 ( Junghwan Park ),김성일 ( Sung-il Kim ) 한국연금학회 2022 연금연구 Vol.12 No.2

This study sets out to promote the vitalization of education for retirement pension subscribers, which remain at the formal level, by proposing ways to make use of recruitment agents for a retirement pension. The study also aims to find the priorities and implications of improvement based on improvement factors needed for them and their comprehensive importance. As for the analysis methods, the study identified improvement factors and the priorities of each of them with the Delphi Method applied twice to a panel of experts in subscriber education and checked the complicated priorities of the improvement factors through the pairwise comparison of factors based on the Analytic Hierarchy Process (AHP). The comparison of results from the two analysis techniques led to these implications: First, a 1:1 interview with a panel of 30 experts in subscriber education based on an open-ended questionnaire in the first round of Delphi Method identified 112 items of improvement. After the exclusion of overlapping items, four upper-level factors were identified: law and institution, reward and infrastructure, qualification system, and professionalism and recruitment agent attribute along with 21 lower-level factors. Based on them, a structured questionnaire was devised and administered to 44 experts in subscriber education in a closed-loop survey in the second round of Delphi Method. Of the upper-level factors, reward and infrastructure recorded the greatest importance, followed by qualification system, law and institution, and professionalism and recruitment agent attribute, in that order. Of the 21 lower-level factors, 13 were characterized by the convergence of expert opinions. Of the converged factors, an increase of recruitment commission rates recorded the highest importance, followed by the addition of subscriber education to the scope of work consignment for recruitment agents and the payment of proper fees for subscriber training or retention services. Secondly, a survey was conducted with 20 experts in subscriber education through AHP analysis, and the results found the greatest importance in reward and infrastructure, which was followed by law and institution, qualification system, and professionalism and recruitment agent attribute, in that order. Of the lower-level factors, the professionalism of recruitment agents was the most important, followed by wages for subscriber education and an increase of recruitment fees. The comparison of the Delphi Method and AHP analysis results reconfirm that reward and infrastructure held the greatest importance among the upper-level factors and that the professionalism of recruitment agents recorded the highest level of importance among the lower-level factors. The different expert panels did not reach an agreement on these results. Thus, it is implied that a consensus should be formed for the professionalism of recruitment agents before the implementation of subscriber education with recruitment agents for a retirement pension. This study was the first research that directly surveyed recruitment agents for a retirement pension. It is significant in that it examined differences in opinions among expert panels and identified the importance and implications of each factor. The findings of the study are expected to serve their roles in the efficient execution of resources when the policy authorities make related decisions.