대학교 엘리트 운동선수들의 국선도 체험에 관한 연구

이형일,김학덕 한국체육철학회 2008 움직임의철학 : 한국체육철학회지 Vol.16 No.3

몸과 마음의 통합을 지향하는 국선도에서도 신체자각과 마음 상태에 대한 주의 깊은 관찰을 강조하고 있다. 본 연구는 국선도를 수련한 운동선수들이 신체를 통해 드러나는 내적 마음의 상태를 어떻게 경험하는지 그 경험의 의미와 구조를 심층적으로 탐구하였다. 이를 위해 본 연구는 2007년 3월부터 2008년 3월까지 7명의 운동선수들과 면담 및 참여관찰 그리고 서면방법을 통해 자료를 수집하였고, 이를 문화기술지적 방법을 활용하여 분석하였다. 분석결과 9가지의 주제와 2가지의 상위범주가 분석되었으며, 중심의미는 존재의 방식, 움직임의 습관, 인식과 효과적 사고, 자아의 자유로움, 심신의 일치, 움직임에서 전일적 신체, 기의 충만감, 자아와 환경의 일치, 절정경험으로 나타났다. 이를 통해 본 연구는 선수생활에서 몸과 마음의 연관성을 결험해 온 운동선수들이 국선도 수련을 통해 신체와 정신에 대한 자각이 더욱 증대되면서 운동수행 능력이 긍정적 변화의 과정을 경험하게 된다는 구조를 발견하였다. 본 연구는 신체를 매개로하여 몸과 마음이 연관되어 있음을 경험할 뿐만 아니라 내적인 심리상태를 이해하고 자각하는 과정을 통해 운동수행 능력을 향상시킬 수 있다는 구조를 이해한 점에서 의의가 있다. 신체적 자각을 통한 운동수행 능력향상에 다양하게 적용되어 보다 새롭고 폭넓은 기법들이 발견되기를 기대하는 바이다. The purpose of this study is to explore the experiences through KukSunDo training of college's elite athletes. This qualitative study examined the experiences of 7 athletes with respect to the KukSunDo Training. Raw data were provided by in-depth interviews using open-ended question and participant observation. An inductive content analysis revealed two broad categories. They were awareness and wholeness. The awareness consists of four sub-category; way of being, movements habits, perception and effective thinking, freedom of self. The wholeness also consists of five sub-category such as an unit of mind and body, whole body in movement, flow of energy, unit of self and environment, peak experience Analysis included a description of the process of learning and employing the skills of the KukSunDo as described by the athletes. Results indicate that these specific athletes attribute positive benefits to their athletic performance from studying the KukSunDo training.

용접부 3차원 표면균열선단에서의 구속상태

이형일,서현,Lee, Hyeong-Il,Seo, Hyeon 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.1

초록 The validity, of a single parameter such as stress intensity, factor K or J-integral in traditional fracture mechanics depends strongly on the geometry, and loading condition. Therefore the second parameter like T-stress measuring the stress constraint is additionally needed to characterize the general crack-tip fields. While many, research works have been done to verify, the J-T description of elastic-plastic crack-tip stress fields in plane strain specimens, limited works (especially. for bimaterials) have been performed to describe the structural surface crack-front stress fields with the two parameters. On this background, via detailed three dimensional finite element analyses for surface-cracked plates and straight pipes of homogeneous materials and bimaterials under various loadings, we investigate the extended validity or limitation of the two parameter approach. We here first develop a full 3D mesh generating program for semi-elliptical surface cracks, and calculate elastic T-stress from the obtained finite element stress field. Comparing the J-T predictions to the elastic-plastic stresses from 3D finite element analyses. we then confirm the extended validity of fracture mechanics methodology based on the J-T two parameters in characterizing the surface crack-front fields of welded plates and pipes under various loadings.

점용접시편의 과부하해석 및 유효 J-적분에 의한 피로수명예측

이형일,최진용,Lee, Hyeong-Il,Choe, Jin-Yong 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.3

This paper proposes an integrated approach, which is independent of specimen geometry and loading type, for predicting the fatigue life of spot welded specimens. We first establish finite element models reflecting the actual specimen behaviors observed on the experimental load-deflection curves of 4 types of single spot welded specimens. Using finite element models elaborately established, we then evaluate fracture parameter J-integral to describe the effects of specimen geometry and loading type on the fatigue life in a comprehensive manner. It is confirmed, however, that J-integral concept alone is insufficient to clearly explain the generalized relationship between load and fatigue life of spot welded specimens. On this ground, we introduce another effective parameter $J_e$ composed of $J_I$, $J_{II}$, $J_{III}$, which has been demonstrated here to more sharply define the relationship between load and fatigue life of 4 types of spot welded specimens. The crack surface displacement method is adopted for decomposition of J, and the mechanism of the mixed mode fracture is also discussed in detail as a motivation of using $J_e$.

Torsional vibration analysis of a planetary gear type antiresonant vibration isolator using transfer matrix method, Part I: System modeling

이형일,Hwan-Sik Yoon 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.3

Recently, a new type of vibration isolator called a dynamic antiresonant vibration isolator (DAVI) has been studied for torsional systems as well as translational systems. In the DAVI for torsional systems, the inertia coupling for the anti-resonance effect is generated by a planetary gear that connects control inertia and inertias at the input and output terminals. In this research, an analytical modeling approach called the transfer matrix method is applied to design a planetary gear type DAVI for complex systems such as an automotive powertrain. Unlike a previous study, inertias of the pinion gears are newly included in the transfer matrix model to improve the model accuracy in this paper. In this part 1 of series papers, the internal configuration of a planetary gear type DAVI system is described and its dynamic model is derived using the transfer matrix method. The derived transfer matrix model is then validated by comparing its frequency response with those obtained by conventional and numerical methods. Finally, the effects of different gear ratios and pinion gear inertia are examined using the derived transfer matrix model.

Torsional vibration analysis of a planetary gear type antiresonant vibration isolator using transfer matrix method, Part II: Application to automotive powertrain

이형일,Hwan-Sik Yoon 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.3

In this research, an analytical modeling and analysis approach called the transfer matrix method is applied to study a planetary gear type dynamic antiresonant vibration isolator (PG-DAVI) for complex rotational systems. In this part 2 of series papers, the transfer matrix method is applied to an automotive powertrain system with an embedded PG-DAVI to characterize torsional vibration attenuation. First, the internal configuration of an automotive powertrain system is described as a baseline system, and its modal characteristics and harmonic responses are calculated. Then, two additional powertrain systems modified with a PG-DAVI and a classical dynamic absorber are presented. Finally, the effectiveness of vibration suppression in the powertrain system using a PG-DAVI is investigated by comparing the modal characteristics, harmonic responses, and time responses of the three powertrain configurations using the transfer matrix method as well as conventional analytical and numerical methods.

누리사업 선정결과 대학 지형이 바뀐다 : 동서대, 지역거점 새 강자 부상/대학가 정원감축 등 구조개혁 가속화

이형일 한국지역사회연구소 2004 지역사회 Vol.47 No.-

기울기 조정에 의한 다층 신경회로망의 학습효율 개선방법에 대한 연구

이형일,남재현,지선수 한국산업경영시스템학회 1997 한국산업경영시스템학회지 Vol.20 No.42

Online update techniques for projection based Robust Principal Component Analysis

이형일,이정우 한국통신학회 2015 ICT Express Vol.1 No.2

Robust PCA is a modification of PCA, which works well on corrupted observations. Existing robust PCA algorithms are typically based on batch optimization, and have to load all the samples into memory. Therefore, those algorithms have large computational complexity as the size of data increases, and have difficulty with real time processing. In this paper, we propose a projection based Robust Principal Component Analysis (RPCA) in order to use RPCA as an online algorithm for real time processing. The proposed online algorithm in this paper reduces computational complexity significantly, although the proposed algorithm has negligible performance degradation compared to conventional schemes. The proposed technique can be applied to various applications, which need real time processing of RPCA.

특발성 안면신경 마비의 장기 추적 관찰

이형일,신정범,이상진,전포성,김경태 대한재활의학회 2005 Annals of Rehabilitation Medicine Vol.29 No.6

Objective: The purpose of this study was to observe clinical characteristics and electrodiagnostic findings of idiopathic facial palsy and to follow up beyond 1 year after onset. Method: From February 2002 to July 2003 the authors analyzed 103 cases that could be followed up after 1 year since diagnosed as idiopathic facial palsy by electrodiagnostic study which was performed at approximately 2 weeks after the onset time. The patients were classified by House- Brackmann (H-B) facial nerve grading system on their first visits and followed up by telephone interview using H-B system. Treatment method, age, sex, medical history and symptoms were noted. In addition, the blink reflex, nerveconduction study and needle electromyography (EMG) were done. Results: When degree of degeneration (% degeneration) was greater than 90% at approximately 2 weeks after the onset or motor unit action potentials were not detected in at least one among the four tested muscles, patients did not gain satisfactory facial function after 1 year. Conclusion: Methods related to prognosis of idiopathic facial palsy were compared with side to side evoked potential amplitude and needle EMG. This methods would be helpful to explain its prognosis.

동파방지용 열선의 발화위험성 및 발화원인 분석

이형일 한국화재조사학회 2014 한국화재조사학회 학술대회 Vol.2014 No.11