社會體育에 있어 餘暇敎育

閔昌基,陳潤洙,南悳鉉 忠南大學校體育科學硏究所 1987 體育科學硏究誌 Vol.5 No.1

Because of economic growth and the change of social structure, humans come to desire leisure education. And affluent living and the increase of leisure times forster the development of sport for all. Having perceived above tendency, I studied both sport for all and leisure education. Consequently, I yielded the following desirable results; 1. The development of sport for all rests on the leisure education in the system of school education, as a part of lifelong education. 2. Sport for all can change the sense of value and restore human qualities through bettering the way of thinking about leisure. 3. Sport for all and leisure education need leisure life at home. Also they play a great role in guiding youth. 4. Sport for all and leisure education need a variety of programs and capable leaders.

STS316L 용접부의 피로거동 및 초음파시럼에 의한 열화특성 평가

남기우,박소순,안석환,도재윤,박인덕 한국비파괴검사학회 2003 한국비파괴검사학회지 Vol.23 No.2

STS316L은 인성, 연성, 부식저항성 등 우수한 기계적 성질 때문에 에너지환경설비 등 구조물에 널리 이용되고 있다. 그러나, 용접구조물은 가혹한 환경하에서 경년열화가 심각하다. 지금까지의 연구들은 주로 용접부의 피로균열진전거동에 관하여 수행되었고, 피로균열진전속도식의 재료상수와 비파괴적 평가의 상관성에 관한 연구는 거의 없었다. 본 연구는 STS316L 용접부의 피로균열진전 거동을 조사하고, 초음파 파라미터로 열화특성을 평가하고 시간-주파수 분석으로 해석을 하였다. 본 연구 결과는 용접구조물의 사용기간 중 피로수명 등을 예측하기 위한 기초 데이터로서 사용될 수 있다. STS316L had been used as the structural material for energy environmental facilities, because austenite stainless steels like 316L have superior mechanical properties of which toughness, ductility, corrosion resistant and etc. However, those welded structures are receiving severe damage due to increasing of the aged degradation. Most studies until now have been carried out against fatigue bahaviors of weldments, and were not well studied on nondestructive evaluation methods. In this study, the fatigue crack propagation behavior of STS316L weldment usually used for vessels of the nuclear power plant was investigated. Also, the degradation characterstics of 316L stainless steel weldments were evaluated by the ultrasonic parameter such as ultrasonic velocity, attenuation factor and time-frequency analysis. The results of this study can be used as a basic data for the prediction of the fatigue crack life of weldments structures without disjointing or stopping service of structures in service.

과학 교육에서 STS 수업모형의 적용효과에 대한 메타 분석

정미진,윤기순,권덕기 경북대학교 과학교육연구소 2008 科學敎育硏究誌 Vol.32 No.2

이 연구의 목적은 STS 과학교육에 대한 국내 연구의 동향을 분석하고 메타분석을 통해 STS 수업모형의 적용효과를 평가하는데 있다. 연구대상 논문은 1991년부터 2006년까지 출판된 석사학위 논문 104편과 과학교육 저널에 출판된 논문 78편을 포함한 총 180편이었다. STS 수업 모형의 효과 평가에 총 56편이 선정되었다. STS 수업 모형 적용 효과의 평균효과크기는 0.40이었다. 이 결과는 STS 수업은 학생들의 과학에 대한 태도, 과학 학업 성취도, 탐구능력, 환경에 대한 태도 및 환경에 대한 지식을 향상시키는데 전통적인 수업보다 긍정적인 효과가 있었음을 의미한다. STS 수업은 환경에 대한 태도의 증진에 가장 큰 평균효과 크기를 나타내었다. 그러므로, STS 수업에서 가장 좋은 효과를 얻기 위해서는 이러한 결과들을 반영하는 것이 필요할 것이다. 향후 STS 교육에 대한 전반적인 평가를 하기 위해서는 STS 수업 모형의 효과와 과학-기술-사회의 상호관계에 대한 교사와 학생들의 이해에 대한 연구 결과를 종합하는 것이 필요하다. The purposes of this study were to analyze the domestic research trend of the STS Education and to evaluate the application effects of STS teaching model by using Meta-analysis. The selected research articles were 180 articles including 104 of the master’s theses and 76 of science education journal articles published from 1991 to 2006. For the evaluation of the effects of STS teaching and learning model, 56 articles were selected finally. The mean effect size of the application effects of STS teaching and learning was 0.40. The result indicated that STS teaching had more positive effects than the traditional teaching on enhancing student's attitude for science, academic achievement in science, inquiry ability, attitude for environment and knowledge for environment. Especially, it had shown the most positive effects on improvement in the attitude for environment. Therefore, it might be better to reflect these results for the best effect of STS teaching. To assess STS education on the whole, it is necessary to synthesize the effects of STS teaching and learning model and the results of the study on teachers’ and students’ understanding about the interrelation of science, technology and society.

내분비 기능이 없는 췌장 도세포 종양-1예 보고

정재걸,박건춘,윤상기,한덕종,조영국 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.1

Nonfunctioning pancreatic endocrine tumor is a rare disease without showing any specific clinical manifestations. Indolent growth of this tumor has a prognosis in between functioning endosrine tumor of pancreas and exocrine adenocarcinoma. We experienced a nonfunctioning pancreatic islet tumor in 59 year old male patient. The tumor in the body of pancreas was clinically silent and had no hormonal activity in immunohistochemical staining

Imaging of renal and prostate carcinoma with refractive index radiology

Yoon, Cheol Yong,Sung, Duck Je,Lee, Ju Han,Kim, Ae Ri,Oh, Chil Whan,Je, Jung Ho,Weon, Byung Mook,Seol, Seung Kwon,Pyun, Aram,Hwu, Yeukuang,Margaritondo, Giorgio,Joo, Kwan Joong,Yoon, Duck Ki THE JAPANESE UROLOGICAL ASSOCIATION 2007 International Journal of Urology Vol. No.

<P><B>Aim: </B> Having better edge enhancement and penetrating power, refractive index radiology is suitable for the imaging of weakly absorbing objects such as tissue specimens. In this study the potential of refractive index radiology was evaluated for the imaging of renal cell carcinoma (RCC) and prostate cancer (PCA).</P><P><B>Methods: </B> Specimens were cut in 3 mm and 4 µm thickness for X‐ray radiology and hematoxylin and eosin (HE) staining, respectively. Radiographic images of RCC and PCA were obtained using the synchrotron hard X‐rays from the 7B2 beam‐line of the Pohang Light Source (PLS). The imaging technique applied was phase‐contrast radiology based on the refraction enhancement mechanism. The resulting radiographic images were analyzed in correlation with those of optical microscopy.</P><P><B>Results: </B> Using unmonochromatized hard X‐rays, it was possible to obtain images with clear edge enhancement and relatively large field of view (6 cm × 6 cm). Even with overlapping signals from thick samples (more than 700‐fold thicker than microscopic images), radiographic images clearly showed histological information of organelles in normal kidney such as glomeruli, tubules, and collecting ducts. Histological information of RCC including tumor subtypes and minute changes such as cystic degeneration could be identified without difficulty. The radiographic images of the prostate were comparable with those of low magnification optical microscopy, providing good visualization of normal microstructures such as adenoma, smooth muscle, and normal glands, or differentiation of tiny tumors from surrounding normal tissues.</P><P><B>Conclusions: </B> These results suggest the potential of refractive index radiology to provide a new way of imaging biological tissues with low absorption contrast such as RCC and PCA.</P>

디스플레이용 PSA 일반 : PDP Filter용 Color-PSA를 중심으로

안덕기 ( Duck Ki Ahn ),이남희 ( Nam Hee Lee ),한문기 ( Moon Ki Han ),방진현 ( Jin Hyun Pang ),이혜경 ( Hye Gyung Lee ),염지윤 ( Ji Yoon Yeom ),문승호 ( Seung Ho Moon ) 한국 접착 및 계면학회 2007 접착 및 계면 Vol.8 No.3

전립선암은 예방할 수 있는가?

윤덕기(Duck Ki Yoon) 대한비뇨기종양학회 2010 대한비뇨기종양학회지 Vol.8 No.1

Prostate cancer remains one of the most common malignancies in western countries and its prevalence is also increasing in Korea. Prostate carcinogenesis is a multistep molecular process induced by genetic and epigenetic changes. The presence of precursor lesions that represent intermediate stages between normal and malignant cells as long as 20 years before the appearance of cancer coupled with the age-dependent incidence of most cancers suggests that carcinogenesis occurs slowly during a protracted interval. This provides the opportunity to intervene before a cancer is established and the high incidence, influence of environmental factors, such as androgen, and extended natural history of prostate cancer also provide multiple opportunities for prevention; therefore prostate cancer is an ideal candidate for chemoprevention, defined as the use of natural or synthetic agents that reverse, inhibit, or prevent the development of malignancy. The development of chemoprevention strategies against prostate cancer would have a huge impact, both medically and economically. Large-scale clinical trials suggest that some agents can prevent the development of prostate cancer. Active research into chemoprevention is ongoing and gathered evidence will provide effective and safe strategies to prevent prostate cancer. This review will highlight the present status of prostate cancer chemoprevention and other mechanisms of prevention, as well as discussing the issues to be addressed.

양측 신장의 원발성 악성 림프종 1 예

심기남(Ki Nam Shim),최규복(Kyu Bok Choi),유승기(Seung Ki Ryu),박사영(Sa Yong Park),박기령(Ki Ryung Park),남은미(Eun Mi Nam),최진혁(Jin Hyuk Choi),강덕희(Duck Hee Kang),윤견일(Kyun Il Yoon),성순희(Sun Hee Sung) 대한내과학회 1997 대한내과학회지 Vol.52 No.4

Primary lymphoma of the kidney is rare, and in most cases is attributable to lymphomatous renal infilitration of systemic non-Hodgkin's lymphoma or an extension from an adjacent site of the disease. Since the renal parenchyma is not a lymphoid organ, the mechanism by which renal lymphoma occur remains poorly understood. We report here a case of primary bilateral B-cell renal lymphoma in 26-year- old man who was treated successfully with combination chemotherapy.

Phase Current Sensing Method Using Three Shunt Resistors to Eliminate Immeasurable Area in Voltage Vector Plane

Duck-Yong Yoon,Dong-Ki Kim,Do-Hyun Jang 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.1

This paper proposes a current sensing method to eliminate the immeasurable areas in three-phase inverters using the shunt resistors. Conventional shunt resistor-based current sensing methods have immeasurable areas in the voltage vector plane. Since motor control performance is degraded by the immeasurable area, various current reconstruction techniques have been proposed to expand the measurement range. Nevertheless, the software algorithm is quite complex, and the reconstruction ability is still unsatisfactory. In the proposed method, shunt resistors are located in series with the inverter output lines to obtain the motor phase currents. Both ends of the shunt resistors are at the high-potential as the dc-link voltage. High-potential voltages are lowered to the common-mode voltage level of the analog amplifi er using voltage divider, and voltage drops across shunt resistors are detected by instrumentation amplifi ers. Immeasurable areas are completely eliminated because phase currents can be detected directly through line shunt resistors. Simulations and experiments are carried out to verify the eff ectiveness of the proposed current sensing method

Prevalence of Eye Diseases in South Korea: Data from the Korea National Health and Nutrition Examination Survey 2008-2009

Yoon, Kyung-Chul,Mun, Gui-Hyeong,Kim, Sang-Duck,Kim, Seung-Hyun,Kim, Chan Yun,Park, Ki Ho,Park, Young Jeung,Baek, Seung-Hee,Song, Su Jeong,Shin, Jae Pil,Yang, Suk-Woo,Yu, Seung-Young,Lee, Jong Soo,Lim The Korean Ophthalmological Society 2011 Korean Journal of Ophthalmology Vol.25 No.6

<P><B>Purpose</B></P><P>The aim of this study is to report on preliminary data regarding the prevalence of major eye diseases in Korea.</P><P><B>Methods</B></P><P>We obtained data from the Korea National Health and Nutrition Examination Survey, a nation-wide cross-sectional survey and examinations of the non-institutionalized civilian population in South Korea (n = 14,606), conducted from July 2008 to December 2009. Field survey teams included an ophthalmologist, nurses, and interviewers, traveled with a mobile examination unit and performed interviews and ophthalmologic examinations.</P><P><B>Results</B></P><P>The prevalence of visual impairment, myopia, hyperopia and astigmatism in participants over 5 years of age was 0.4 ± 0.1%, 53.7 ± 0.6%, 10.7 ± 0.4%, and 58.0 ± 0.6%, respectively. The prevalence of strabismus and blepharoptosis in participants over 3 years of age was 1.5 ± 0.1% and 11.0 ± 0.8%, respectively. In participants over 40 years of age, the prevalence of cataract, pterygium, early and late age-related macular degeneration, diabetic retinopathy and glaucoma was 40.2 ± 1.3%, 8.9 ± 0.5%, 5.1 ± 0.3%, 0.5 ± 0.1%, 13.4 ± 1.5%, and 2.1 ± 0.2%, respectively.</P><P><B>Conclusions</B></P><P>This is the first nation-wide epidemiologic study conducted in South Korea for assessment of the prevalence of eye diseases by both the Korean Ophthalmologic Society and the Korea Center for Disease Control and Prevention. This study will provide preliminary information for use in further investigation, prevention, and management of eye diseases in Korea.</P>