인터넷 기반에서 자동화 복합 공정 제어 시스템 구현

한얼,박성무,허지웅,홍상은 순천향대학교 부설 산업기술연구소 2008 순천향 산업기술연구소논문집 Vol.14 No.1

Recent advances in information technology and internet based skills have an effect on the structure of production for a conventional industry, In the future, the concept of 'e-automation' will be used as a total solution for improving the competitiveness of company. This paper introduces the internet-based monitoring and control system as a new concept to improve productivity in industrial manufacturing. The major functions of the developed system are (1) integrating the different type of PLC(GL0FA-G3 and MELSBC-Q), (2) connecting the dual communication protocols (TCP/IP and RS-232C) and (3) supporting the MMKMan Machine Interface). The operating system is developed using LabVIEW Program and the system connects with internet for remote monitoring and control methods.

단순지지된 샌드위치슬래브교량의 파괴강도해석

한지웅,한봉구 서울産業大學校 2005 논문집 Vol.54 No.2

현재 복합재료분야의 기술은 나날이 발전되고 있는 상황이다. 복합재료로 만드는 여러 가지 산업시설물과 생활용품 등이 제작 또는 생산되고 있는 실정이다. 그러나 아직까지도 토목분야에서는 옛날의 구시대적인 재료인 콘크리트와 강재를 이용하여 건물 및 교량 등을 건설하고있다. 여기에는 여러 가지 문제점이 있지만 그 중에서 가장 크게 문제가 되는 것은 복합재료의 이론이 너무 복잡하고 힘들다는 점에 있다. 일반 기술자가 사용하기에는 너무 어렵다는 것이다. 본 논문에서는 토목기술자가 복합재료의 설계적 마인드를 가질 수 있게 함과 동시에 실무설계를 할 수 있게 하였으며, 복합재료로 이루어진 교량을 설계하기위하여, 단면은 가장 경제적이면서 응력에 유리한 폼코어 형태를 채택하였고, 응력을 산출함에 있어서는 유한차분법 프로그램을 이용하였으며, 프로그램의 정확도는 Navier의 해와 비교하여 정확도를 입증하였다.

시행 전 정보의 제시빈도가 기술습득에 미치는 영향

한지영,김기웅 한국학교체육학회 2003 한국학교 체육학회지 Vol.13 No.2

본 연구는 사전정보가 운동학습에 영향을 미친다는 선행연구를 바탕으로 골프퍼팅에서 일직선 스트로크 기술을 학습하는데 사전정보 중 지각적 선행훈련이 학습에 도움을 주는가를 살펴보고, 사전정보를 다양한 빈도로 제시하여 과제정보의 제시빈도가 기술습득에 미치는 영향을 살펴봄으로서 사전정보가 가이던스 가설에 영향을 받는가를 알아보고자 한 것이다. 이를 위해 24명의 오른손잡이 여대생(평균연령 23세)을 실험조건에 따라 각각 8명씩 3개의 집단(시행 전 정보제시 100%, 50%, 0% 집단)에 무선배정하였다. 실험은 5회 시행을 1분단으로 하여 8개 분단(총 40회)의 습득시행을 수행하는 것으로 설계하였다. 따라서 실험은 3(집단) ?8(분단) 반복측정 요인설계(3? FD with repeated-measures on block)하에서 이루어 졌다. 습득시행을 한 후, 약 24시간 후 2분단(총 10회)의 파지검사를 실시하였다. 실험을 통해 얻어진 점수는 이차원 과제(2D(dimension) task)의 정확성을 평가하기 위한 평균반경 오차(mean radial error: MRE)와 수행의 일관성을 측정하기 위한 이원변량 가변오차(bivariate variable error: BVE) 점수로 환산하여 분석하였다. 그 결과 평균반경오차와 이원변량 가변오차에서 통계적으로 유의한 차이가 나오지 않았으나 기술통계치에서 100% 집단이 다른 두 집단보다 좋은 결과를 보여주므로 가이던스 가설(guidance hypothesis)이 사전정보에는 영향을 미치지 않는다는 것을 보여주었다. 그러나 50% 제시집단은 오히려 0% 제시집단 보다 더 큰 오차점수를 보여주었다. 이것은 골프퍼팅이 이차원적인 과제이기는 하지만 본 연구는 퍼팅의 중요요소인 방향성(direction)과 힘의 크기(amplitude of force) 중 방향성만을 제시하였으므로 보다 분별력 있는 분석이 필요하며 시행 전 과제정보의 효과에 대한 일관된 연구가 부족하므로 지각적 선행연습을 포함한 모든 분야에서 다양한 연구가 요구되어진다. This study was intended to examine influence of perceptual pretraining, among pre-practice information, on learning straight stroke techniques in golf putting; and to examine the influence of differing frequencies of task information on the acquisition of golf putting techniques. On the basis of the results of previous studies that pre-practice information exerts a significant influence on motor learning. For this study, 24 right-handed female university students aged 23 in average were randomly and equably allocated to three different experimental groups; i.e. 1) 100% pre-practice information presentation group, second group 50%, and the third by 0%. The experiments was designed as follows: Acquisition trial blocks were to be performed for 8 blocks, with each block consisting of 5 trials (i. e. a total of 40 trials). Accordingly, the experiment was in a involving 3 (groups) ?8 (blocks) factorial design with repeated-measures on the second factor. Twenty four hours (i. e. one day) after the completion of the acquisition trial block, a retention test was conducted for 2 blocks (a total of 10 tests). The score points calculated from the experiments were converted into 1) mean radial error (MRE), i. e. a gauge to evaluate accuracy of two-dimensional tasks, and 2) bivariate variable error (BVE). i. e. a gauge to assess consistency of performance. As a result of the analysis, no significant difference was found between the MRE and BVE, However, in terms of descriptive statistical data, the group with 100% presentation of pre-practice information posted better results when compared to the two other groups, which is incongruous with the guidance hypothesis in case of pre-practice information. According to the guidance hypothesis, it is expected that high frequency group should not show better learning effect as compared to lower frequency group. However, the group with 50% presentation of pre-practice information showed larger errors when compared to the group with 0% presentation of pre-practice information. The findings of this study manifests a need for an analysis with higher discernability as the study proposed a direction only rather than proposing a combination of a direction and amplitude of force, which serve as major factors of golf putting, although golf putting is 2 dimensional task. The lack of consistent research results on effects of pre-practice task information, to date is interpreted to indicate a necessity of exploring multi-faceted studies in all the relevant areas including perceptual pretraining

운동기술의 학습에서 인지적 선행 훈련의 역할

한지영,김기웅 이화여자대학교 동작과학연구소 2004 이화체육논집 Vol.7 No.-

The study is intended to examine the influence of perceptual pretraining - one form of available pre-practice information - on teaming straight stroke techniques in golf putting and to examine what influence differing frequencies of task information have on the acquisition of golf putting techniques. The study is based on the findings of previous studies that pre-practice information exerts a significant influence on motor leaning. For this study, 24 right-handed female university students, with an average age of 23, were randomly and equally allocated to three different experimental groups. One group was given 100% pre-practice information, the second group 50%, and the third was given 0%. The experiments was designed into the following regiment: Acquisition trial blocks were performed for 8 blocks, with each block consisting of 5 trials (i. e. a total of 40 trials). Accordingly, the experiments were conducted with a 3 (groups) x 8 (blocks) factorial design with repeated-measures on block Twenty four hours after the completion of the acquisition trial block, a retention test was conducted for 2 blocks (a total of 10 trials). The score points calculated from the experiments were converted into absolute error(AE) and variable error (VE) values for accuracy and consistency The results revealed a significant statistical difference a part of AE and VE values. In terms of descriptive statistical data, the group given 100% of pre-practice information posted the best results, compared to the two other test groups, with 50% group performing better than the 0%, group. The finding of this study demonstrated that perceptual pretraining is not affected by guidance hypothesis, and therefore, providing pre-practice information with more frequency contributes to the process of acquiring motor skills.

정신분열증 환자에서 주관적 음성증상경험의 임상적 의의

김지웅,김찬형,구민성,손석한,박진철,최문종,이은철,윤도준,이홍식 대한신경정신의학회 1999 신경정신의학 Vol.38 No.1

연구목적 : 현재까지 정신분열증의 음성증상평가는 주로 객관적인 평가에만 의존해왔기 때문에, 환자들이 주관적으로 직접 경험하는 음성증상의 평가는 경시된 경향이 있었다. 그러나 실제 많은 정신분열증 환자들은 음성증상을 자가하고 있다. 특히, 개관적인 양성 및 음성증상이 관찰되지 않는 경우에도 환자 본인은 음성증상으로 괴로워한다는 이전의 연구보고들이 있었다. 따라서 저자들은 주관적인 음성증상경험과 개관적인 양성증상 및 음성 증상, 우울증상, 불안증상, 추세외로증상과의 상관성을 알아봄으로써 정신분열증의 정신병리에 있어 주관적 음성증상의 존재를 규명하고, 정신분열증 정신병리의 발생기전을 유추해보며 이차적 음성증상과의 관계를 규명하고자 하였으며. 이러한 연구가 정신분열증 정신병리를 이해하는데 도움을 줄 수 있을 뿐 아니라 환자를 공감적으로 이해하는데 도움을 줄 수 있을 것으로 생각되어 본 연구를 시행하였다. 방 법 : DSM-Ⅳ 진단기준의 정신분열증 진단기준에 해당하는 환자를 대상으로 하였다. 주관적인 음성증상의 평가를 위해서 Scale for the Subjective Experience of Negative Symptoms : Korean version(KSENS)을 이용하였고, 개관적인 정신분열증 정신병리의 평가는 Positive and Negative Syndrome Scale(PNASS)를 이용하였다. 우울증상, 불안증상, 추세외로증상의 평가를 위해서 각각 Hamilton Rating Scale for Depression(HAM-D), Hamilton Rating Scale for Anxiety(HAM-A), Extrapyramidal Symptoms Rating Scale(ESRS)을 이용하였다. 각 정신병리척도 점수간의 상관성은 Spearman 상관계수를 이용하여 분석하였다. 결 과 : K-SENS 24항목 중에서 환자가 이를 불편한 것으로 경험하고 있는 항목의 비율과 PANSS 양성척도점수 사이에는 유의한 상관점이 있었으며 (r=-0.40, p〈0.05), 양성증상 중에서도 특히 과대성(r=-0.46, p〈0.05), 의심/피해(r=-0.34, p〈0.05), 적개심(r=-0.52, p〈0.05) 등의 증상과 유의한 상관관계를 보였다. K-SENS 24 항목 중에서 환자가 이를 불편한 것으로 경험하고 있는 항목의 비율과 PANSS 전체점수(r=-0.25, p〉0.05), PANSS 음성척도점수(r=-0.20, p〉0.05), PANSS 일반정신병리척도(r=-0.08, p〉0.05),와는 각각 유의한 상관성이 없었다. K-SENS 24항목 중에서 환자가 이를 불편한 것으로 경험하고 있는 항목의 비율과 HAM-D 점수(r=-0.01, p〉0.05), HAM-A 점수(r=-0.11, p〉0.05), ESRS 총점(r=0.34, p〉0.05)은 각각 유의한 상관성이 없었다. 결 론 : 본 연구결과에서, 정신분열증 환자들이 불편한 것으로 경험하는 주관적 음성증상과 과대성, 의심/피해, 적개심 같은 양성증상은 역상관관계가 있었으며, 이러한 결과를 바탕으로 양성증상이 주관적으로 불편하게 느끼는 음성증상에 대한 가능성과, 혹은 양성증상이 심할 경우, 이에 압도되어 음성증상을 주관적으로 느끼지 못할 수 있다는 가능성이 시사되었으며, 향후 종적인 연구를 통해 이를 규명해 볼 필요성이 제시되었다. 주관적인 음성증상경험과 우울증상, 불안증상, 추세외로 증상과는 상관성이 없는 것으로 나타나서 이들 증상과는 독립적인 증상임을 시사한다. Objective : Since the evaluation of negative symptoms has depended on the clinician's objective observation, the patients subjective experience of negative symptoms has been neglected. However, in fact, a lot of patients are aware of their negative symptoms. There are several reported suggesting that patients suffer from the subjective experiences of their deficit symptoms, even though the objective positive and negative symptoms cannot be observed. Under these circumstances, we have attempted this study with the idea that it would be helpful in understanding the psychopathology of schizophrenia. Also it would help clarifying the relationship between subjective experience of negative symptoms and objectives positive and negative symptoms, depression anxiety symptoms, and extrapyramidal symptoms. Method : All the 37 patients satisfied the diagnostic criteria of DSM-Ⅵ for schizophrenia. The subjective experiences of negative symptoms were evaluated using Scale for the Subjective Experience of Negative Symptoms : Korean version(KSENS), and for the depression, anxiety, extrapyramidal symptoms, we used Hamilton Rating Scale for Depression(HAM-D), Hamilton Rating Scale for Anxiety(HAM-A), and Extrapyramidal Symptoms Rating Scale(ESRS). The correlation between each psychopathology was tested by calculating Spearman correlation coefficient. Results : There was a significant correlation between the ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS, and the score of PANSS positive subscale(γ=-0.40, p〈0.05), Among the positive symptoms, grandiosity(γ=-0.46, p〈0.05), suspiciousnes/persecution(γ=-0.34, p〈0.05), and hostility(γ=-0.52, p〈0.05) showed a significant correlation with the ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS. There was no significant correlation between the ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS, and PANSS total score(γ=-0.25, p〉0.05), or negative subscale score(γ=-0.20, p〉0.05), or general psychology subscale score(γ=-0.08, p〉0.05), respectively. There was no significant correlation between ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS, and HAM-D(γ=-0.01, p〉0.05), or HAM-A(γ=-0.11, p〉0.05), ESRS(γ=0.34, p〉0.05), respectively. Conclusion : These revealed that the negative correlation between the subjective negative symptoms experienced as an uncomfortable ones and the objective symptoms such as grandiosity, suspiciousness/persecution, and hostility. From these results, the possibility that positive symptoms are used as a defense to hide from the negative symptoms because they are overwhelmed by their positive symptoms, is suggested. These results also suggest that subjective experiences of negative symptoms are independent from depression, anxiety and extrapyramidal symptoms.

DYNAMIC MATERIAL PROPERTIES OF THE HEAT-AFFECTED ZONE (HAZ) IN RESISTANCE SPOT WELDING

JI-WOONG HA,JUNG-HAN SONG,HOON HUH,JI-HO LIM,SUNG-HO PARK 한국소성가공학회 2008 한국소성가공학회 컨퍼런스 Vol.2008 No.10

Bone Marrow-Derived Mesenchymal Stem Cells Improve Diabetic Neuropathy by Direct Modulation of Both Angiogenesis and Myelination in Peripheral Nerves

Han, Ji Woong,Choi, Dabin,Lee, Min Young,Huh, Yang Hoon,Yoon, Young-Sup SAGE Publications 2016 Cell transplantation Vol.25 No.2

A Study on the Constructing Discrete Fracture Network in Fractured-Porous Medium with Rectangular Grid

Ji-woong Han,Yong-Soo Hwang,Chul-Hyung Kang 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.1

결정질 암반에 위치한 가상의 방사성폐기물처분장에 대한 정확한 안전성 평가를 수행하기 위해서는 다공암반으로 대표되는 공학방벽 및 결정질 암반으로 대표되는 자연방벽을 모두 고려한 매질에서의 물질 거동 특성을 정확하게 모사하는 것이 중요하다. 본 논문에서는 단열-다공암반내 유동 및 물질전달의 정확한 해석을 위한 연결망 구축방법에 대하여 서술하였다. 실제 단열암반을 사실적으로 모사하기 위하여 단열 물성자료는 확률밀도함수를 이용하여 생성하였다. 2차원의 사각격자로 모사된 단열암반과 육면체로 모사된 다공암반간 교차선의 원활한 검색을 위하여 단열암반과 연결전 다공암반의 교차면에 가상의 단열암반을 추가적으로 도입하였다. 전체유동경로를 구성하기 저하여 생성된 단열들 간의 교차선을 효율적으로 검색할 수 있는 방법 및 단열암반 및 단열-다공암반간의 연결도를 신속히 확인하는 알고리즘을 제안하였다. 이러한 방법들은 추후 방사성폐기물처분장에서의 단열-다공 암반을 통한 핵종 이동 특성을 모사할 수 있는 수치코드 개발에 많은 도움을 줄 것으로 사료된다. For the accurate safety assessment of potential radioactive waste disposal site which is located in the crystalline rock it is important to simulate the mass transportation through engineered and natural barrier system precisely, characterized by porous and fractured media respectively. In this work the methods to construct discrete fracture network for the analysis of flow and mass transport through fractured-porous medium are described. The probability density function is adopted in generating fracture properties for the realistic representation of real fractured rock. In order to investigate the intersection between a porous and a fractured medium described by a 2 dimensional rectangular and a cuboid grid respectively, an additional imaginary fracture is adopted at the face of a porous medium intersected by a fracture. In order to construct large scale flow paths an effective method to find interconnected fractures and algorithms of swift detecting connectivities between fractures or porous medium and fractures are proposed. These methods are expected to contribute to the development of numerical program for the simulation of radioactive nuclide transport through fractured-porous medium from radioactive waste disposal site.

Induced Pluripotent Stem Cells: Emerging Techniques for Nuclear Reprogramming

Han, Ji Woong,Yoon, Young-sup Mary Ann Liebert 2011 Antioxidants & redox signaling Vol.15 No.7

<P>Introduction of four transcription factors, Oct3/4, Sox2, Klf4, and c-Myc, can successfully reprogram somatic cells into embryonic stem (ES)-like cells. These cells, which are referred to as induced pluripotent stem (iPS) cells, closely resemble embryonic stem cells in genomic, cell biologic, and phenotypic characteristics, and the creation of these special cells was a major triumph in cell biology. In contrast to pluripotent stem cells generated by somatic cell nuclear-transfer (SCNT) or ES cells derived from the inner cell mass (ICM) of the blastocyst, direct reprogramming provides a convenient and reliable means of generating pluripotent stem cells. iPS cells have already shown incredible potential for research and for therapeutic applications in regenerative medicine within just a few years of their discovery. In this review, current techniques of generating iPS cells and mechanisms of nuclear reprogramming are reviewed, and the potential for therapeutic applications is discussed.</P>

산소부화화염의 희석방법에 따른 화염특성 변화

한지웅(Ji-Woong Han),이창언(Chang-Eon Lee) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11

Oxygen-enriched non-premixed flame characteristics was investigated numerically with variation of<br/> dilution methods, which are Flue gas recirculation(FGR) and fuel injection recirculation(FIR). In order to<br/> compare flamelets in various oxygen-enrichment conditions reasonably, the adiabatic flame temperature and<br/> Damkoller number was held fixed by modulating amount of diluents to fuel and oxidizer stream and by<br/> varying global strain rate of flame respectively. Also modified GRI 3.0 reaction mechanism was utilized,<br/> which was able to predict oxygen-enriched methane flame correctly. Fundamental flame characteristics such<br/> as structure, heat release rate and extinction with FGR and FIR were compared in various oxygen enrichment<br/> conditions.