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유리체절제술과 내경계막제거술 후 9개월에 지연 폐쇄된 특발성 황반원공 1예
이종헌,김호윤,박성후,이지은,변익수,Jong Heon Lee,Ho Yun Kim,Sung Who Park,Ji Eun Lee,Ik Soo Byon 대한안과학회 2014 대한안과학회지 Vol.55 No.5
Purpose: To report a case of delayed idiopathic macular hole closure after vitrectomy, internal limiting membrane peeling, and gas tamponade. Case summary: A 69-year-old female complained of visual disturbance in her left eye. At presentation, her visual acuity was 20/100 in the left eye. Fundus examination and optical coherence tomography revealed a full-thickness macular hole 489 μm in diameter as well as posterior vitreous detachment. Hence, vitrectomy, concurrent cataract surgery, internal limiting membrane peeling and gas tamponade were performed. One month postoperatively, the hole remained unclosed, although decreased in size to 378 μm. At 2 months, cystoid macular edema developed and postoperatively the hole diameter decreased gradually to 311 μm, 252 μm and 156 μm at 2, 3, and 5 months, respectively. Finally, the hole was closed upon the resolution of macular edema at 9 months. However, the visual acuity of 20/100 remained unchanged. Conclusions: Delayed closure of holes which may be related to cystoid macular edema, can develop after macular hole surgery. J Korean Ophthalmol Soc 2014;55(5):775-779
이종헌,홍창희,이화용,Lee, Jong-Heon,Hong, Chang-Hui,Lee, Hwa-Yong 대한전자공학회 1979 전자공학회지 Vol.16 No.3
본 논문에서는 바나디움 주화물을 사용한 새로운 반도체 소자인 C.T.R을 제조하여 그외 전기적 특성을 조사하였다. 그 실험결과는 다음과 같다. (1) 제조될 C.T.R의 저항급변계수 는 3정도였고, (2) 의 값은 환원시간과 급냉시간에 크게 의존하였으며, (3) 의 큰 값을 갖는 C.T.R은 짧은 switching현상을 갖는다. In this paper, we fabricated a samiconductor C. T. R.(Critical Temperature Resisthor) using vanadium-oxides as material and measured its electrical characteustics. Experimental results are as follows; (1) The abrupt resistance change coefficient of the fabricated C. T, R., , is approximately 3 and (2) the value of depends largely on the reducing time and quenching time and also (3) the C. T, R. with larger value of has shorter switching time.
지연시각피드백이 학령기 아동의 구어과업별 정상적인 비유창성 빈도 및 구어속도에 미치는 영향
이종헌(Jong Heon Lee) 한국언어치료학회 2013 言語治療硏究 Vol.22 No.2
The present study was aimed at studying the efficacy of speech rate manipulation in twenty young children. The Speed-Manipulation Program (SMP) in this study was based on manipulating various lengths of utterances in reading tasks by visual cues. Specifically, the SMP focused on increasing self-monitoring and self-controlling skills on self speech fluency. Twenty school aged children (age 7 to 9 years old) participated in this study and their parents agreed to their participation. The degree of normal disfluency was severe in the assessment of Paradise-Fluency Assessment-Ⅱ(P-FA-Ⅱ; Shim et al., 2010). These children were able to read words voluntarily and also exhibited normal disfluency in reading tasks. A single-case design was adopted. The pre- and post-assessments were carried out in the three areas of normal disfluency: frequency, patterns, and reading rate (in reading tasks). The results of this study were as follows. First, the results showed that the SMP was effective on reducing normal disfluency frequencies in reading tasks. Second, the results showed that the SMP reduced the symptoms of normal disfluency. Finally, the results showed that the reading rate in post-therapy was much slower compared to pre-therapy in all cases. The results of the present study are suggestive of the usefulness of this therapy focusing on manipulating speech rate in reading tasks in reducing the severity of normal disfluency. However, the results of the present study are to be interpreted with caution. The results need more studies relating with SMP for stuttering to confirm its efficacy in the clinical area of stuttering.