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유학 심성론의 심리치료와 한의학적 활용에 대한 소고 -율곡의 인심도심도론을 중심으로-
이정환 ( Jung Hwan Lee ),정선용 ( Sun-yong Chung ),김종우 ( Jong-woo Kim ) 대한한방신경정신과학회 2018 동의신경정신과학회지 Vol.29 No.3
Objectives: The purpose of this study is to use in therapy through considering representative oriental philosophical thought in terms of psychotherapy and Oriental medicine. Methods: This study examines psychotherapy and oriental aspects of “Diagram theory of InShimDoShim” that Yulgok, a Neo-Confucian scholar in the Joseon Dynasty, wrote about action of the mind and suggests ways to use it. Results and Conclusion: Diagram theory of InShimDoShim contains much content that can be applied in psychotherapy. It has a positive perspective of human nature and looked at life as realization of nature and life as subjective self-realization. Positive and negative experiences of life are expressions of positive nature. By reinterpreting these experiences, humans contribute to the goal of life that expresses their nature in a healthy way. Yulgok defines a healthy mind capable of living a good life as “an inshim who listens to doshim's command”. Therapists can adopt this mindset as the goal of psychotherapy. Yulgok said that the way of manifesting nature is only possible through energy, and that the clear and tidy of this temperament creates a healthy and unhealthy mind. In this part, it is possible to apply therapeutic intervention of the diagram theory of InShimDoShim and Oriental medicine. Oriental medicine can calm temperament by using a treatment method to regulate energy, and clear energy creates a healthy mind and body. The principle that the mind is composed of nature and energy provides a basis for psychosomatic medicine.
이정환(Jung-Hwan Lee),정형진(Hyung-Jin Chung),배서영(Su-Young Bae),김경일(Kyungil Kim) 대한정형외과학회 2019 대한정형외과학회지 Vol.54 No.1
신경초종은 Schwann 세포에서 기원하는 양성 종양이다. 총상 신경초종은 총상형이나 다결정성의 성장 형태를 보이는 신경초종의 드문 아형이다. 총상 신경초종은 대부분은 피부와 피하조직에 고립성 병변(solitary lesion)을 보이지만 드물게 심부조직 내에 위치하기도 한다. 저자들은 매우 드물게 후경골 신경 및 원위부 분지 신경에서 발생하였으며, 심부조직에 위치하여 골 변형을 동반한 다발성 총상 신경초종이 재발한 1예를 경험하였기에 이를 보고하고자 한다. Schwannomas are benign neoplasms with a Schwann cell origin. A plexiform schwannoma is a rare variant of a schwannoma with a plexiform or multinodular growth pattern. The condition occurs mostly as a solitary lesion in the skin or subcutaneous tissue, or uncommonly located in the deep soft tissue. We report a rare case of recurred multiple plexiform schwannomas arising from the posterior tibial nerve and its branch, which was located in a deep anatomic location and accompanied by a bony deformity.
모달중첩법을 이용한 ESC 어셈블리용 브라켓의 피로수명평가
이정환(Jung-Hwan Lee),김승중(Seung-Joong Kim),한민규(Min-Gyu Han),장세인(Sane Chang),정인승(In-Seung Chung) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
It is well known that the ESC (electronic stability control) system plays an important role in vehicle safety. In general, the structural integrity of ESC system should be assured over 10 years. This is because the fatigue life evaluation for ESC system under service loading is required. The purpose of this study is to find an appropriate condition of structural damping coefficient for frequency response analysis and to evaluate the fatigue life of a bracket for ESC assembly by using modal superposition method. To verify the results from fatigue analysis, an experiment was conducted under the same condition as numerical simulation, and their results were compared.
노인 불면에 대한 EFT 불면 치료 프로그램(EFT-1)의 효과 평가를 위한 예비적 연구
이정환 ( Jung Hwan Lee ),서현욱 ( Hyun Uk Suh ),정선용 ( Sun Yong Chung ),김종우 ( Jong Woo Kim ) 대한한방신경정신과학회 2011 동의신경정신과학회지 Vol.22 No.4
Objectives: The aim of this study was to evaluate the effects of EFT-I(EFT program for insomnia) for insomnia in the elderly as a preliminary study. Methods: This study was a single group pre-post comparative study that involved 10 elderly women(mean age=76.3±4.29), who visited a senior welfare center, complained of insomnia symptoms. Subjects received 8 sessions(twice a week for 4 weeks and 1 hour for each session) of EFT-I group training. Insomnia severity, depression, state anxiety, and life satisfaction of each subject were evaluated twice at pre and post of EFT-I. Korean Sleep Scale, Short form of Geriatric Depression Scale(SGDS), State-Trait Anxiety Inventory(STAI), and life satisfaction scale were used as evaluation tools. The data were analyzed using paired-samples T-test. Results: Insomnia severity, life satisfaction, depression, and state-anxiety were significantly improved by EFT-I. Conclusions: Result of this study showed that EFT-I can be a useful treatment program for elderly insomnia. Larger Clinical trials are needed to verify effect of EFT-I as a community based insomnia management program for the elderly.
자웅이주성 옻나무속 3수종의 자연집단에서 성비와 성간 생장량 및 공간적 분포
김삼식,이정환,정재민 ( Sam Shik Kim,Jeong Hwan Lee,Jae Min Chung ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.2
Sex ratios, and patterns of tree size and growth variation, resource allocation, spatial and age class distribution between the sexes were investigated in natural populations of the sexual trees, R. trichocarpa and R. sylvestris, and the mainly asexual, clonal tree, R. javanica of the dioecious Rhus (Anacardiaceae) distributed in Korea. Sex ratios for three species exhibited a significant degree of female bias, but among the populations, sex ratios were seen to vary quite widely. The measurement of tree size and annual increment of male trees in R. trichocarpa and R. sylvestris were significantly higher than those of female trees, but not significantly different in R. javanica. In all of the species, flowering branch number per individual and inflorescence number per branch of males outnumbered those of females. Branch number per individual, rachis(leaf) number per branch and rachis(leaf) number per inflorescence were more in females than in males. These results were considered as reproductive efforts to increase the pollen supply in males and the fruit production in females. Spatial distribution analysis in two different populations of R. trichocarpa indicated that males and females were randomly distributed in space, but seedlings were clumped around parental trees. Analysis of age class distributions between the sexual reproduction trees, R. triclaocarpa and R. sylvestris, and the asexual, clonal tree, R. javanica showed a different distribution in frequencies of males and females in each age class. These results showed that sexual and asexual reproduction tree species had almost different preference of habitats, and different sex ratio and annual growth.
Development and Application of Pipeline Network Optimization Simulator
성원모,권오광,이정환,허대기,Sung Won-Mo,Kwon Oh-kwang,Lee Chung-Hwan,Huh Dae-ki, 한국가스학회 1997 한국가스학회지 Vol.1 No.1
본 연구에서는 실제현장에 활용할 수 있는 가스파이프라인 네트워크의 최적화 모델을 개발하기 위해 먼저 구조 설계에 있어서 네트워크 알고리즘 중 MCST(Minimum Cost Spanning Tree) 알고리즘을 도입하여 전반적인 구조를 결정하고, 기존 방법의 단점을 보완하기 위해 Constrained Derivative 방법을 적용하였다. 또한 모델 개발 시, 압축기$\cdot$밸브등의 갑작스런 운전상태의 변화와 파이프의 파열 둥으로 인한 유동저해 현상을 예측할 수 있는 파이프라인 해석모델과 연계할 수 있도록 고려하여 설계하였다. 각 절점과 간선간의 압력 및 유량, 즉 파이프라인 배관망에서 필요한 수요량을 적절히 공급할 수 있는 파이프라인 망의 직경과 길이를 최소의 비용으로 결정하는 복합형 파이프라인 네트워크 최적설계 모델을 개발하였다 개발된 모델을 전형적인 천연가스 파이프라인 네트워크에 적용하여 최적설계를 수행한 결과, 보다 작은 파이프 직경과 낮은 절점 압력으로도 각 절점에서의 수요량을 공급할 수 있도록 설계할 수 있었으며, 원래의 시스템과 비교하여 약 $40\%$정도의 비용 절감효과를 볼 수 있었다. 또한, 기존의 국내 수도권 배관망에 대해 본 모델을 적용하여 새로운 설계모형을 제안함으로써 초기설계나 향우 추가 확장되는 부분의 배관망에 대해서도 경제성을 고려하여 최소비용의 네트워크 구성을 할 수 있음을 확인하였다. This paper presents a hybrid network model(HY-PIPENET) implementing a minimum cost spanning tree(MCST) network algorithm to be able to determine optimum path and constrained derivative(CD) method to select optimum Pipe diameter. The HY-PIPENET has been validated with the published data of 6-node/7-pipe network. Networking system and also this system has been optimized with MCST-CD method. As a result, it was found that the gas can be sufficiently supplied at the lower pressure with the smaller diameters of pipe compared to the original system in 6-node/7-pipe network. Hence, the construction cost was reduced about $40\%$ in the optimized system. The hybrid networking model has been also applied to a complicated domestic gas pipeline network in metropolitan area, Korea. In this simulation, parametric study was peformed to understand the role of each individual parameter such as source pressure, flow rate, and pipe diameter on the optimized network. From the results of these simulations, we have proposed the optimized network as tree-type structure with optimum pipe diameter and source pressure in metropolitan area, Korea, however, this proposed system does not consider the environmental problems or safety concerns.