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카도나형 인공각막 이식 수술 후 16년간의 임상 경과 관찰 1예
안한철,이동은,주명진,김재호,Han Chul An,Dong-Eun Lee,Myung-Jin Joo,Jae-Ho Kim 대한안과학회 2005 대한안과학회지 Vol.46 No.1
Purpose: To report one case which has been showed successful results after prosthokeratoplasty using `Cardona Bolt and Nut` model. Even though prosthokeratoplasty has a high rate of failure within 5 years after surgery because of many complications, But there was no complications over a 16-year period in this case since surgery by one of the authors (J-H K). Methods: This patient had an alkali burn on both his eyes due to the accidental explosion of carbamate in 1979 when he was 26 years old. His corneas were densely pacified with neo-vascularization despite undergoing keratoplasty once on his right eye, and twice on his left eye. To improve his vision, we performed ultimately a successful Cardona Bolt and Nut prosthokeratoplasty on his right eye in 1988. Results: During the period of to 16-year follow-up the visual acuity of his right eye was maintained at 0.1 without correction, and 0.15 with correction (+7.0 D.), even though his visual field narrowed(within 10 degree) due to the long and narrow optical cylinder.
Line Patterning using a Scanning Probe Lithography Technique based on Convolution Method#
한철수,권광민,안상정,이해원,정정주 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.3
In this article, we report the development of a fabrication process for predictable line patterns. The proposed process uses two control parameters: the tip speed and step size, with the convolution method. From the oxidation curves, we choose the two oxidation parameters: bias voltage and oxidation time. Given a desired line pattern, these oxidation parameters are then used for calculating the control parameters. The step size is determined by the width of the nanodot profile, and the tip speed is calculated using the step size and the oxidation time. As the overlapping of exposure area happens because of the nanodots located densely, the electrochemical reaction is continuously activated during the line lithography process in the overlapped area so that the amount of overlap can be estimated with the convolution method. From experimental results with a commercial atomic force microscope, we verified that our method is effective in fabricating nanoline patterns.
손용승,한철용,안관영,Son, Yong-Seung,Han, Chul-Yong,Ahn, Kwan-Young 한국벤처창업학회 2012 벤처창업연구 Vol.7 No.2
오늘날 국내 외의 경제발전에 서비스산업의 비중이 매우 커지고 있으며, 미래사회에도 지속적으로 증가될 것으로 예측되며, 이러한 서비스 산업의 경영방식의 하나로 프랜차이즈시스템이 확산되고 있다. 프랜차이즈 시스템(Franchise System)은 선진국에서 인기를 끌고 있는 선진국형 유통형태이며, 유통시장 개방 이후 국내에서는 외국유명브랜드를 중심으로 급속한 성장세를 보이고 있다. 이로 인해 국내 제조 및 유통업계에서는 미래유망업종으로 프랜차이즈시스템에 대한 관심이 커지고 있다. 최근 들어 외환위기와 금융위기를 계기로 다양한 연령계층이 노동시장으로 유입되면서 단기간 내에 적은 자본으로 나의 사업을 창업하고자 하는 인구가 크게 늘고 있다. 이 중 상당수는 독립적 사업을 창업하지만 사업에 대한 경험과 전문지식이 부족하면서 실패를 경험하는 경우가 크게 늘고 있다. 이에 비해 프랜차이즈 창업은 검증된 상품 및 서비스를 제공받으면서 창업한다는 점에서 성공가능성이 높아지면서 프랜차이즈에 대한 관심과 논의가 증가하고 있다. 그러나 프랜차이즈에 대한 관심이 증대하고, 프랜차이즈 산업의 규모가 커지면서 다양한 문제점 또한 부상하고 있다. 국내의 경우 비교적 늦게 프랜차이즈 산업이 도입되었지만 빠르게 성장하면서 문제점을 노정하고 있는 것이 현실이다. 이에 본 논문에서는 프랜차이즈 산업의 특성에 대하여 고찰하고, 또한 다른 나라들의 경우에 대한 사례를 고찰하면서 국내 프랜차이즈 산업의 문제점을 조명하고 이에 대한 대응방안 및 프랜차이즈 산업의 발전방안을 제시하고자 하였다. Franchising has long been an effective form of distribution that is used primarily by manufacturers whose product lines are especially suited exclusive or highly selective distribution. By IFA(International Franchise Association), franchising is defined as a continuing relationship in which the franchisor provides a licensed privilege to do business, plus assistance in organizing, training, merchandising, and management in return for a consideration from the franchisee. Thus franchising is a method for the owner(franchisor) of product, service, or method to obtain retail or wholesale distribution through licensed, affiliated dealers(franchisees). With rapid increase of franchising industry globally, franchising industry is very rapidly increasing especially in the sector of outdoor restaurant industry in Korea. But there are many problems to be settled for promoting this industry. For example, the industry is too much lean outdoor restaurant industry. With franchisors' short history and lack of management capacity, shortage of distribution infrastructure, smaller size of franchising system, and low trust between franchisor and franchisee, and so on, the industry has many barriers to overcome for promoting it. Here we are suggesting that taxation benefaction, monetary support for the starting franchisee, establishment of fair trade principle, promoting information system and professional human resource should be needed.