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Changwon Seo,Jaehyun Ahn,Eunhae Shin,Seongjong Kim 한국영어교과교육학회 2018 영어교과교육 Vol.17 No.3
In recent years, there has been an increase in the number of international people choosing to learn the Korean language. However, many of them are struggling to speak Korean because of the complexity of the Korean phonemic system. Korean visual phonics is a strategy that has been used to improve Korean pronunciation for international students. There is evidence suggesting that students who learned pronunciation of consonants using the visual phonics strategy showed significant improvement when compared to students using more traditional methods. The results for vowels, however, were mixed. The visual phonics group performed better with monophthongs than dipthongs. This could be attributed, in part, to the complexity of combining two different, yet related, signs to make a single compound vowel. Based on these results, we know that Korean visual phonics can be used to improve certain aspects of pronunciation for learners, specifically articulation and phonation.
Myasthenia Mimicking Monocular Elevation Deficiency
Kee, Changwon,Cha, Dong Min,Ahn, Jeeyun,Hwang, Jeong-Min SAGE Publications 2013 Journal of child neurology Vol.28 No.1
<P>Monocular elevation deficiency is the inability to elevate the eye in abduction and adduction. Myasthenia gravis could mimic any pattern of ophthalmoplegia. However, myasthenia gravis mimicking monocular elevation deficiency appears to be very rare. A 12-month-old girl presented with the inability to elevate the left eye and blepharoptosis from 3 months of age. A neostigmine test showed a weakly positive response. Repetitive stimulation of the left orbicularis oculi produced no decremental response. Three assays for acetylcholine receptor antibodies were negative. Placing ice over the lids definitely improved left blepharoptosis. In conclusion, myasthenia gravis could mimic elevation deficiency. An ice test could be very helpful in making the diagnosis. Myasthenia gravis should be included in the differential diagnosis of monocular elevation deficiency even at a young age.</P>
Hoon Lee,Saeyoung Ahn,Changwon Lee,Hongbae Kim,Jein Jeong,Taigun Im 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.52
Platinum (Pt) is a biocompatible material which exhibits strong thermal and electrical conductivity due to its high melting point and good durability. Thus, it is used commonly in bio-electrodes and bio-chips. In this study, a tungsten (W) wire was coated with a platinum lm and was analyzed for its mechanical and biocompatibility properties. The platinum lm was deposited by magnetron sputtering with an UnBalanced Magnetic (UBM) eld system. The experiment was performed under a variety of conditions by changing the deposition temperature, the bias voltage, the magnetic eld and the deposition time in order to deduce the optimum conditions. We examined the exfoliation and the sedimentation states of the anode and the cathode by using microscope and an electron probe microanalysis (EPMA) for the electro-chemical corrosion test using the Hank's solution. The lm showed a very low impurity level, and the surface and the cross section of the lm appeared elaborate. No sedimentation appeared in the lm, and the crystallization in the (110), the (200), the (220) and the (222) directions observed. However, at a high current density (800 mA/cm2), sedimentation was observed in the corrosion test.
MVC 프레임워크를 적용한 웹 기반의 시스템 관리 도구의 설계 및 구현
김지연(Jiyeon Kim),안창원(Changwon Ahn) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.2Ⅰ
스몰토크-80의 사용자 인터페이스는 MVC (Model/View/Controller) 프레임워크에 입각하여 디자인 되었다. 그 이후 MVC 프레임워크는 많은 시나리오에서 사용되고 있다. MVC 프레임워크를 적용하여 웹 어플리케이션을 개발하면 시스템 개발 및 유지 보수가 쉬워지며 확장성과 성능 향상에 도움을 준다. 본 논문에서는 MVC 프레임워크를 적용하여 시스템 관리 도구를 설계하고 구현한다. 더 나아가 MVC 프레임워크의 단점을 보완한 방법을 제시하고 이를 시스템 관리 도구에 적용하여 본다.