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심리적 운동중독에 관련된 운동 지속 동기 심리의 과학적 세분화
정윤하 한국전시산업융합연구원 2017 한국과학예술융합학회 Vol.29 No.-
The purpose of this study is to find out the reason why fitness club users who recognize exercise addiction participate in exercise and to understand the structure of those factors. Statistical data from questionnaires were collected from 277 adolescents who participated in a fitness exercise in a fitness center located in Seoul and Kyunggi - do. Statistical programs SPSS.20.0 and AMOS. 20.0 were used for data analysis. As a result of exploratory factor analysis and confirmatory factor analysis, it was found six factors restructure that the motivation for participating in the activities including physical, psychological, achievement, socialization, institutional factors. 본 연구는 피트니스 클럽을 지속적 이용하는 성인들을 대상으로, 운동 참여와 지속이라는 행위를 결정하는 과정을 파악하기 위해, 운동참여 동기를 파악하고 동기를 구성하는 요인구조를 알아보고자 하였다. 서울과 경기도에 위치한 피트니스 센터에서 헬스운동에 참여하고 있는 성인들 중, 자신이 심리적 운동중독증상이 있다고 인지하는 215명으로부터 설문지를 통한 통계적 자료를 수집하였다. 자료분석에는 통계프로그램인 SPSS.20.0과 AMOS. 20.0가 사용되었다. 탐색적 요인분석과 확인적 요인분석 결과, 운동중독 인지작들의 참여동기는, 신체적, 심리적, 성취, 과시, 사교, 시설적 요인 등 총 6가지 요인으로 재구성 됨을 알수 있었다.
소아 특발성 중추성 요붕증의 임상경과, 내분비학적 소견 및 뇌자기공명 영상 소견의 경과 관찰
정윤하,정우영 인제대학교 2008 仁濟醫學 Vol.29 No.-
Idiopathic central diabetes insipidus (CDI) can be diagnosed when it occurs in the absence of a cause known to be responsible for diabetes insipidus. Some patients initially diagnosed as idiopathic CDI progressed to brain tumors. We reviewed clinical, endocrinological and brain MRI courses in patients with pediatric idiopathic central diabetes insipidus, to assess the predicting factors for progression to brain tumors. We reviewed the medical records of all patients who had documented cases of idiopathic CDI from 1988 to 2008, and studied clinical, endocrinological and brain MRI courses at diagnosis and during follow up. The patients include 6 males and 5 females. Their mean age at diagnosis was 10.0±4.5(4-19) years and mean follow up duration is 4.3±4.7(0.3-14) years. After mean follow up duration of 4.3±4.7(0.3-14) years, follow up Brain MRI showed brain tumor in 3(27%) patients and no interval change in 4(36%) patients with pituitary stalk thickening and in 3(27%) patients with loss of posterior pituitary signal. 4(27%) patients had growth hormone deficiency and 3(27%) patients had multiple pituitary hormone deficiency. Because some patients of idiopathic CDI progressed to brain tumor, we should follow up more carefully brain MRI and pituitary hormone deficiency.
D* 서치와 퍼지 알고리즘을 이용한 모바일 로봇의 충돌회피 주행제어 알고리즘 설계
정윤하,박효윤,이상진,원문철 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.8
이 논문은 모바일 로봇이 고정 장애물 또는 움직이는 장애물이 존재하는 환경에서 장애물을 회피하며 운행될 수 있는 제어 알고리즘을 연구하였다. 이 제어 알고리즘은 D* 알고리즘과, 충돌 위험도 퍼지로직, 이동로봇의 행동결정 퍼지로직을 사용하여 전역경로계획과 지역경로계획을 수행한다. D* 알고리즘에는 로봇이 이동하는 2 차원 공간을 정방형 격자 분활하여 적용한다. 이 알고리즘은 파이썬 프로그래밍 언어와 이동로봇의 운동방정식을 사용한 시뮬레이션을 통해 검증하였다. 시뮬레이션 결과를 통해 알고리즘을 적용하여 로봇이 이동하는 장애물을 피하거나 모르는 고정 장애물을 피하면서 원하는 위치로 이동하는 것을 볼 수 있다.
정윤하,Do-Young Choi,Sungho Kim,Gil-Bok Choi,Sung-Woo Jung 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.1
Thirty-five-nanometer T-gate GaAs-based In0.52Al0.48As/In0.53Ga0.47As metamorphic high electron mobility transistors (mHEMTs) are successfully fabricated using a zigzag-shaped T-gate. We obtain a maximum extrinsic transconductance (gm) of 1060 mS/mm and a maximum oscillation frequency (fmax) of 610 GHz. These superior results are obtained by reducing the T-gate’s length to 35 nm without the assistance of a supporting layer and by fabricating a wide-recessed-gate structure. The stand-alone 35-nm T-gate effectively improves the device performance because it doesn’t cause additional parasitic capacitances. The wide-recessed-gate structure alleviates impact ionization in the channel, which suppresses the kink effect in the output characteristic and reduces the output conductance (gds). In addition, the wide-recessed-gate structure reduces the gate-to-drain capacitance (Cgd); consequently realizing a state-of-the-art fmax. The fmax of 610 GHz, to our knowledge, is the highest value reported to date for GaAs-based HEMTs.
정윤하,이철원 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3
This study was to explore the running experience of general runners, This also tried to seek a way for the promotion of running as an affirmative Leisure activity. The relationship among optimal experiences, satisfaction and pleasure from running as a solo sport activity was examined by systemically analyzing the experiences from running, The experiences about the satisfaction and happiness of the participants were also examined, Results from this study could be used as a theoretical background for the promotion of running as a leisure activity, and should provide a basis for further research on the experiences in Korean society.