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.

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.

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.

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.

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.

액체 공기 저장 시스템 연계 혁신형 SMR 유연운전 기술개발

박정환(Jung Hwan Park),채용재(Yong Jae Chae),김나영(Nayoung Kim),이정익(Jeong Ik Lee) 한국유체기계학회 2023 한국유체기계학회 학술대회 논문집 Vol.2023 No.12

u-Learning 시대의 교사양성 체제 모형 연구

박정환(Park, Jung-Hwan),정동욱(Cheong, Dong-Uk),박형성(Park, Hyung-Sung) 한국산학기술학회 2009 한국산학기술학회논문지 Vol.10 No.11

이 연구의 목적은 u-Learning 시대에 교육의 변화를 주도할 수 있는 교원양성체제의 모형을 제시하는데 있 다. 이 목적을 달성하기 위하여 첫째, 현재의 교원양성체제를 고찰하였다. 둘째, 교원양성체제에 활용될 수 있는 유비 쿼터스 기술을 분석하였다. 셋째, 기술 분석을 토대로 교원양성체제 구성요소 간 커뮤니케이션을 지원하는 유비쿼터 스 기능을 탐색하였다. 마지막으로 u-Learning 시대의 교원양성 체제에 대한 예비교사들의 인식, 필요성, 요구사항 등 을 분석하였다. 이러한 연구를 토대로 u-Learning 시대에 적합한 교원양성체제의 모형을 제시하였다. 이 연구에서 제 시하는 교원양성체제 모형은 u-Learning 시대를 주도할 교사 양성에 도움을 줄 수 있을 것이다. The purpose of this research is to develop a model of teacher education system in u-Learning age. To achieve the purpose, first, the current teacher education system was analyzed. Second, ubiquitous technologies which could be used in future teacher education system were analyzed. Third, functions of ubiquitous technologies supporting communication between the elements of teacher education system were explored based on the analysis of the technologies. Forth, researchers analyzed pre-service teachers’ understanding, needs, and demands for the future teacher education system in u-Learning age. The model of teacher education system which is appropriate for u-Learning age was proposed based on the results of analyses. The developed model could help to educate pre-service teachers who will lead the education in u-Learning age.

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.

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.-