ET 중력계에 의한 기조력 변화 연구

박정환,한욱,Park, Jung Hwan,Han, Uk 대한자원환경지질학회 1998 자원환경지질 Vol.31 No.2

Earth tide observations were taken at AMIST observatory in Seoul by LaCoste-Romberg ET gravimeter from September 2 to 16, 1997 for determining the gravimetric factor ($\delta$) and analyzing the tidal components. Meter drifts were corrected by regression and then denoised by threshholding wavelet, a data processing tool. The mean value of $\delta$ is 1.2 and the mean phase lag of & ($M_2$, $S_2$) and & $K_1$, $O_1$) is $0.07{\pm}0.03^{\circ}$ and $0.08{\pm}0.07^{\circ}$ by analyzing the observed earth tides. For yielding measurements of gravity accurate to about 0.01 mgal, the Earth tide observations are required by ET meter. The tidal variations are due to the planet's distance and zenith angle. With the exception of Earth-Moon and Earth-Sun mechanism, the possible causes of tidal variations are tectonical, meterological and hydrological perturbations. The long period and broad observations are required for determining the state of art gravimetric factor in Korea.

저온 플라즈마 공정에 의한 NO_x 제거시 공정 변수의 영향

박정환,김동주,김교선,Park, Jung-Hwan,Kim, Dong-Joo,Kim, Kyo-Seon 강원대학교 산업기술연구소 2001 産業技術硏究 Vol.21 No.1

In this study, we analyzed the $NO_X$ removal effiency by the low temperature plasma process and investigated the effect of several process variables. Most of NO is converted into $NO_2$ and, later, into $HNO_3$ which reacts with $NH_3$ to form $NH_4NO_3$ particles. As the frequency of appling voltage increases, as the applied voltage increases or as the residential time increases, removal efficiency of the NO supplied initially increase. The removal efficiency of $NO_X$ also increases with the increase of $NH_3$ supplied.

침(鍼) 및 전침(電鍼)이 SHR 대뇌(大腦)에서 Doublecortin, PSA-NCAM, pCREB 양성 신경세포에 미치는 영향

박정환,이재동,김창환,Park, Jung-hwan,Lee, Jae-dong,Kim, Chang-hwan 대한침구의학회 2004 대한침구의학회지 Vol.21 No.3

Background and Objective : The aim of this study was to investigate the effects of acupuncture and electroacupuncture on the DCX, PSA-NCAM, and pCREB expression in the brain of spontaneously hypertensive rats(SHR). Materials and Methods : SHR were divided into five groups: control group, acupuncture group, 2Hz electroacupuncture(EA) group and 100Hz EA group. We evaluated the changes of the DCX, PSA-NCAM, and pCREB positive cells using immunohistochemical method. In the olfactory bulb, we investigate the optical densities of the immunoactive cells. In the dentate gyrus and the piriform cortex, we count the immunoactive cells under the $100{\times}$ visual field optical microscope. Results : 1. The optical densities of DCX-positive cells in the subependymal zone were significantly decreased in all groups, compared to the control group. 2. The counts of DCX-positive cells in the dentate gyrus were significantly increased in all groups, compared to the control group. The counts of DCX-positive cells in the piriform cortex were significantly increased in the acupuncture and 100Hz EA group, compared to the control group. 3. The optical densities of PSA-NCAM-positive cells in the subependymal zone were significantly decreased in the acupuncture and 2Hz EA group, compared to the control group. 4. The counts of PSA-NCAM-positive cells in the dentate gyrus and the piriform cortex were significantly increased in all group, compared to the control group. 5. The counts of pCREB-positive cells in the dentate gyrus were significantly increased in all groups, compared to the control group. The counts of pCREB-positive cells in the piriform cortex were significantly increased in the acupuncture and 100Hz EA group, compared to the control group. Conclusion : We conclude that acupuncture and EA may affect neuronal cell proliferation, differentiation and plasticity in the brain.

사상의학적(四象醫學的)으로 접근한 노인성 입얼굴 이상운동증 환자 치험 2례

박정환,김윤하,고가연,안택원,Park, Jung-Hwan,Kim, Yoon-Ha,Go, Ga-Yeon,Ahn, Taek-Won 사상체질의학회 2015 사상체질의학회지 Vol.27 No.3

Objectives This study was designed to report diagnosis and treatment by Sasang Constitutional Medicine to the patients with Oro-facial Dyskinesia. Methods These two patients were diagnosed as Soyangin and Taeeumin according to the result of Sasang constitutional diagnosis, and treated by Sasang constitutional medications and acupuncture. The progress was evaluated with the Global Assessment Scale (GAS). Result Oro-facial Dyskinesia was almost disappeared in each patients. the one patient was cured with Chongshimyeonja-tang and Yuldahanso-tang, and the other was cured with Hyeungbangjihwang-tang. Conclusion We can treat Oro-facial Dyskinesia whose cause is mostly idiopathic with the diagnosis and treatment of Sasang Constitutional Medicine.

하드웨어와 소프트웨어의 역할 분담을 통해 칩 면적을 크게 줄인 Image Signal Processor의 설계

박정환,박종식,이성수,Park, Jung-Hwan,Park, Jong-Sik,Lee, Seong-Soo 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.8

이미지 센서에서 획득된 영상에는 화질 개선을 위해 다양한 이미지 처리 과정이 필요하다. 이러한 이미지를 처리해 주는 역할을 하는 것을 ISP(Image Signal Processor)라고 한다. 기존의 비전 카메라는 상용 ISP 칩을 사용하는 대신에 자체적으로 ISP 기능을 소프트웨어로 구현하여 PC등에서 수행하는 방식을 택해왔다. 그러나 이러한 방식은 ISP 기능을 수행하는데 많은 연산을 필요로 함에 따라 고성능 PC를 필요로 하는 문제가 있다. 본 논문에서는 하드웨어와 소프트웨어의 효율적인 분담을 통해 칩 면적을 크게 줄인 ISP를 제안한다. 연산을 빠르게 처리하기 위하여 연산이 많은 블록은 하드웨어로 설계하였고, 하드웨어의 면적을 고려하여 하드웨어와 소프트웨어를 동시에 이용하도록 설계하였다. 구현된 ISP는 VGA(640*480)급의 영상을 처리할 수 있으며 0.35um 공정에서 91450 게이트의 크기를 가진다. The Image sensor needs various image processing to improve image quality. ISP(Image Signal Processor) performs various image processing. Conventional vision cameras have own software ISP functions and perform in PC instead of using commercial ISP chips. However these methods have problems such as large computation for image processing. In this paper, we proposed ISP that significantly reduced chip area by efficient sharing of hardware and software. Large operation blocks are designed to hardware for high performances, and we used hardware simultaneously with software considering the size of the hardware. The implemented ISP can process VGA(640*4800) images and has 91450 gate sizes in 0.35um process.

칼 융의 사상과 다석 류영모 사상의 비교분석

박정환(Jung-hwan Park) 한국종교학회 2017 宗敎硏究 Vol.77 No.1

This paper aims to compare and contrast the ideas of C.G. Jung, a Western psychologist with Dasuk Ryu Youngmo who known as the spiritual man of Korea. In contrast to Freud, who had neglected unconsciousness as a repository of sexual desires, Jung found unconsciousness as an important research area by discovering the creativity and possibility of unconsciousness. For this reason, Jung, unlike other psychologists, has not only been much easier to compare with people with religiosity, but also the contents that can be revealed through comparison can be much richer. Therefore, by comparing two thinkers in the East and the West, I would like to find common points of their ideas and to reveal their ideas more deeply. The composition of this paper is as follows. First, keeping in mind the common sense of unconsciousness and nothingness(無), I want to compare Jung s unconsciousness with Dasuks nothingness(無) and void(虛空). They saw the unconsciousness and nothingness(無) as the basic foundation for forming human beings. Second, the questions about the center of nothingness(無) and unconsciousness, which can be seen as the innermost nucleus of human being as Selbst and Ölna, respectively, were raised. Jungs Selbst is the center of consciousness and unconsciousness, and Dasuks Ölna is an immanent self(selbst) given by God. Jung and Dasuk insisted that we should go back to these two centers of humanity. Third, we reviewed Jung and Dasuks Christology, paying attention to the fact that one of Jungs prototypes was Christ. Their Christology has a lot in common in that it emphasizes the possibility of human beings distinct from orthodox Christianity. Finally, We compared ‘the individualization’ and ‘the Bataltagi(바탈타기)’ perceived by two people as the process of self–actualization. Given the life they have lived in, the two process are likely to be recognized as important goals for them. Through the comparative analysis of the above two people, I tried to show that the two people made their way towards their goal of self-life, and that they lived for the completion of their own life and tried to inform others about it.

유비쿼터스 컴퓨팅 환경에서 디지털 포트폴리오 평가 시스템 설계

박정환(Park, Jung-Hwan) 한국산학기술학회 2008 한국산학기술학회논문지 Vol.9 No.1

본 연구는 유비쿼터스 컴퓨팅 환경에서 디지털 포트폴리오를 명가하기 위한 시스템을 설계하려는 데 그 목 적이 있다. 이러한 목적을 달성하기 위하여 포트폴리오에 관한 이론들을 고찰하고, 선행 프로그램들을 분석해서 시스템에 포함되어야 할 내용요소를 추출하였다 추출된 내용요소를 바탕으로 유비쿼터스 컴퓨팅 환경에서 디지털 포트폴리오 평가를 위한 교육평가 시나리오를 개발하였으며, 개발된 시나리오를 바탕으로 디지털 포트폴리오 평가 체제의 요소 즉, 학습활동, 포트폴리오 평가, 포트폴리오 활용, 유비쿼터스 기술, 데이터베이스 영역을 반영하여 시스템 설계를 수행하였다. 이러한 설계는 기존의 포트폴리오 평가 방법과 달리 우리 생활 속에 내재해 있는 컴퓨터 즉, 유비쿼터스 컴퓨팅 환경에서 평가가 어떠한 과정과 방법으로 이루어져야 하는지에 대한 안내를 제공할 것이다. 또한 새로운 시스템은 실제 교육평가에서 활용될 수 있는 유비쿼터스 기술이 무엇인지를 알고자 하는 이들에게 도움이 될 것이다. This study aims to design a digital portfolio assessment system in ubiquitous computing(DPASUbi). To achieve that goal, the following issues were worked: Review of various theoretical discussions on portfolio and an analysis of existing programs to select elements to be included in the DPASUbi. Educational evaluation scenarios for the DPASUbi were developed based on the elements. The system was designed on reflecting these elements, that is, learning activities, assessment and usage of portfolio, ubiquitous technology and database. This system will provide guidance on what methods and assessment procedures should be applied in the ubiquitous computing environment totally different from the conventional one. Also, The new system will be helpful in indicating what kind of techniques should be required in the real educational evaluation.

통일에 대한 종교학적 성찰 : 동질성의 회복

박정환(Park Jung hwan) 호남대학교 인문사회과학연구소 2017 人文社會科學硏究 Vol.55 No.-

본 논문은 종교적인 관점을 적용하여 통일에 대한 성찰을 하고 있다. 논문에서는 한국인이 통일이전에 동질성을 가지고 있었으며 한반도의 통일은 이러한 동질성을 다시 회복할 수 있다는 가정아래 통일을 대비해야 함을 강조했다. 한국인이 공유하는 영성, 종교성을 살펴보고 이러한 영성을 다시 회복하자는 것이 본고의 주된 주장이다. 한국인은 통일 이전 유불선의 종교가 들어오기 이전에 풍류라고 하는 삼교를 포함하는 오묘한 도를 지니고 있었다. 한사상을 기본으로 하는 이러한 동질성은 남·북한이 분단되면서 남과 북에서 각각 다른 형태로 변환되어 북한에서는 주체사상이라는 형태로 남한에서는 기독교의 번성이라는 형태로 진행되었다. 통일을 대비하여 한국인이 통일 이전에 가졌던 동질성을 회복하고 민족의 얼을 다시 회복함으로써 남북한의 통일주체들인 사람의 통일을 이루어내는데 기여하는 것이 본 논문의 주된 목적이다. This thesis focuses on the reflection on unification which is seen from the religious perspective. The paper emphasized that Koreans were homogeneous before division and that unification of the Korean peninsula should prepare for unification under the assumption that this homogeneity can be regained again. It is the main argument of this essay to examine the spirituality and religiosity shared by Koreans and restore this spirituality. The Koreans had a mysterious Tao(道) that included three religion -confucianism, buddhism, taoism- before the entrance of the three religion. This article examines how homogeneity that Koreans have in common changes in the South and the North. This homogeneity based on Han-thought has been transformed into a different form in the divided North and South. While it evolved in the form of Juche Ideology(주체사상) in North Korea, in South Korea it has progressed in the form of prosperity of Christianity. I have shown that the divided North and South identities can eventually be brought together again. The main objective of this paper in preparing for unification is to contribute to the unification of the subjects of the two Koreas by restoring the homogeneity that the Koreans had before the division.

농어촌버스 단일요금제 시행에 따른 손실액 산정방안에 관한 연구

박정환(PARK, Jung Hwan),김명수(KIM, Myung soo),서소민(SEO, So Min),조경남(JO, Kyung Nam),유병훈(YOO, Byung hoon) 대한교통학회 2014 대한교통학회 학술대회지 Vol.70 No.-

가상현실공간에서 아바타를 통한 원격학습이 아바타 사용자의 교수효능감에 미치는 영향

박정환(Park, Jung-Hwan),정동욱(Cheong, Dong-Uk) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.4

이 연구의 목적은 가상현실공간에서 아바타를 이용한 원격강의 경험이 사용자의 교수효능감에 미치는 영향 을 알아보는 것이다. 이 연구를 위해 J대학교 교육학 전공 강좌의 수강생 9명이 연구에 참여하였다. 이들은 모두 교 육학 전공의 박사과정 학생들이었다. 이 강좌의 첫 번째 강의에서 6시간 동안 세컨드라이프 사용법에 대해 면대면 강 의가 이루어졌으며, 이후 3시간씩 14회의 강의는 모두 세컨드라이프 내 강의실에서 이루어졌다. 설문에 응한 5명의 참여자로부터의 성찰노트, 연구자 관찰 및 면담 내용을 분석한 결과, 세컨드라이프에서 아바타를 사용한 원격강의 수 강과 발표 경험은 세컨드라이프에서 아바타를 사용한 원격 강의를 수행할 수 있는 자신감에 영향을 미친 것으로 나 타났다. 이 연구는 세컨드라이프라는 가상현실공간에서 아바타를 사용한 원격교육의 가능성을 확인하였다는 것에 의 의가 있으며, 향후 원격 교육에 대한 연구를 촉진할 것으로 기대된다. The purpose of this study was to investigate the influence of distance education experience using users’ avatars in virtual reality space on their teaching efficacy belief. There were 9 participants who were enrolled in a course in doctoral program of education department in J University for the study. The first class of six sessions was face to face class on how to use Second Life and the 14 classes of 3 sessions were done in a classroom of Second Life. According to the analysis of reflection notes, interviews, researcher’s observations of 5 participants, their experiences of presentation and taking classes in distance education using their own avatars in Second Life had positive influence on participants’ teaching efficacy belief in their future working for distance education using avatars of Second Life. The implication of this study is to show some conditions for successful distance education as well as to see the potential of distance education in 3D virtual reality space using avatars. This study will contribute to promote the future study in distance education field.