• Proceedings of the Korean Society of Computer Information Conference
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• 2011.01a
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• pp.121-124
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• 2011

본 논문에서는 다양한 형태의 장애인을 대상으로 유연하게 적용 가능한 공공자격시험의 표준화 시스템을 설계하고 개발한다. 1차적으로 4 ~ 6급의 저시력 시각장애인, 뇌병변 장애인, 손부위 등에 대한 지체 장애인을 대상으로 제안시스템을 개발하여 적용한다. 물리적 조건으로 공공자격에 응시하는 장애가 있는 수험자는 수검사항에 위반되지 않는 상태에서 일반 응시자와 별도로 키보드를 지참하여 응시 가능하나 행망용 다기능 한글 모아치기 키보드로 제한되어지고 최소 17인치 이상의 모니터가 제공되어지며 수험 장소에 대하여 특정좌석을 지정할 수 있다. 시험적 조건으로는 장애를 가진 수험자에 대하여 장애상태를 구분하여 일반인 대비 20 ~ 30%의 추가시간이 할당되어지고 실기시험에 대하여는 150%의 확대문자가 기본적으로 제공되어진다. 상위 조건으로 필기시험과 실기시험이 실시되며 특별하게 시각장애인에 대한 실기시험에서는 일반인에 대한 시험 종료 후 제안시스템 제어 하에서 별도의 추가시험 절차가 부가적으로 자동진행 되어진다. 본 구현시스템은 장애인을 위한 8단계의 세부기능 설정 후 13가지의 평가 항목을 설정하여 실제 공공자격시스템에 시험 적용한 결과, 평균적으로 매우우수의 최상급 평가를 받았으며 장애인에 기반 한 공공자격분야 글로벌 표준화 시스템으로 제시하기 위한 후속 연구를 진행하고 있다.

• Journal of Broadcast Engineering
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• v.8 no.4
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• pp.351-364
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• 2003

In this paper, we propose visual Impairment descriptions for MPEG-21 digital item adaptation. The proposed visual impairment descriptions include low vision impairment and color vision deficiency. It is symptom-based description so that the description is systematic enough to sufficiently describe user's any kind of visual impairment characteristics and easy enough to describe for any user with visual impairment. In this paper, we performed some experiments with the proposed description in MPEG-21 digital item adaptation. The experiments showed that the proposed description Is effective to adapt visual resources In digital item for users with visual impairment and to give enhanced visual accessibility to them.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.137-138
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• 2018

시각장애인은 활동을 하는데 있어 많은 제약이 따른다. 특히 사물을 만지거나 음성을 이용하여 정보를 얻어 이동해야 하는 어려움을 겪는다. 공공기관 및 민간기업에서는 시각장애인의 어려움을 해결하기 위하여 다양한 지원방안을 내놓고 있지만 여전히 미흡한 것이 현실이다. 이 중 시각장애인이 사용하고자 하는 기기에 설치된 점자판에 접근하는데는 특히나 많은 어려움이 발생한다. 본 논문에서는 이러한 시각장애인 및 저시력자들이 효과적으로 점자판에 접근할 수 있는 시스템을 제안한다. 제안시스템은 블루투스를 이용하여 음성으로 시각장애인들이 이용하려는 시설 및 기기 등에 쉽게 접근할 수 있도록 도와줌으로써, 사회적 약자의 어려움을 해소하는데 많은 도움을 줄 수 있을 것으로 판단된다.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1991.06a
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• pp.43-43
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• 1991

부비동 점액낭종은 주로 전두동과 사골동에 발생하며 점차 커져서 인접 기관에 영향을 미치기도 한다. 저자들은 1985년 1월부터 1991년 3월까지 충남대학교병원 이비인후과에서 부비동 점액낭종으로 수술받았던 15예를 대상으로 임상분석을 실시하여 다음과 같은 결과를 얻었다. 성별은 남자 6예 여자 9예였고, 연령은 17세에서 79세까지였으며 50대에서 5예로 가장 많았다. 병변부위로는 사골동에 국한된 경우가 7예로 가장 많았고, 전두동과 사골동을 동시에 침범한 경우가 4예, 전두동에 국한된 경우가 2예, 사골동과 접형동을 침범한 경우가 1례였다. 안증상은 11예에서 있었으며 그중 안구돌출이 7예로 가장 많았고, 시력감퇴 6예, 안구운동장애 4예 등이었다. 5예에서 두개저 파괴로 인한 경막의 노출이 있었다. 치료는 사골동 비외수술법이 7예로 가장 많았고, Lynch operation 4예, 골성형 전두동수술 2예, Lateral rhinotomy를 통한 배액 1예, Midfacial degloving approach를 통한 배액이 1예였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.989-991
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• 2022

최근 들어 기후변화와 함께, 화재 발생이 증가함에 따라 인명피해와 경제적 피해가 늘고 있다. 화재 발생시 인명 피해를 줄여주는 소방시설 중 경보설비와 유도등설비는 위험 상황시 경보와 함께 동선을 유도하는 유도등을 보고 재실자들이 안전한 공간으로 신속하게 대피할 수 있도록 하는 소방설비 이다. 이중에서 유도등설비는 화재발생 상황에서 매우 중요한 역할을 맡고 있다. 특히 복잡한 동선을 가지고 있는 복합건물 및 지하철, 고층건축물에 신속한 대피 유도에 필요한 설비이다. 그러나, 화재 초기에 신속한 대피를 해야 하는데 5분도 되지 않아 화재로 인해 발생한 가스는 검은 연기로 유도등의 역할과 효과를 저해하는 현상을 가져온다. 즉 유도등의 녹색빛이 보이지 않는다. 이는 저시력자 또는 시력에 장애를 가지고 있는 자들은 더욱더 유도등을 확인하고 대피 하기란 쉽지 않게 된다. 이런 단점이 있는 기존의 유도등에 IoT(Internet of Things)와 함께 증강현실 이미지를 스마트기기에 활성화 한다면, 진한 검은연기로 인한 빛의 가림으로 인한 유도장애에 대해서 개선 할 수 있을 거라 생각되어, 변류기의 전류 감지를 시작으로 그 신호를 스마트기기에 녹색의 유도 이미지를 활성화하여 골든타임에 대피가 신속하도록 설비를 구현하여 그 가능성을 확인하였다.

• Journal of Yeungnam Medical Science
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• v.11 no.1
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• pp.55-62
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• 1994

The use of intraoperative application of Mitomycin C at the filtration site has been known to improve the surgical outcome in glaucomatous eyes with high risk for failure of trabeculectomy. The author performed trabeculectomies with intraoperative Mitomycin C on 25 eyes of 20 patients with poor surgical prognosis to study the efficacy and safety of this technique in glaucomatous patients with high risk for failure of trabeculectomy. After the preparation of a scleral flap, 0.2mg/ml solution of Mitomycin C was applied between Tenon's capsule and the sclera for 2 minutes. The exposed area was then irrigated with 200 ml of balanced salt solution. The follow-up period was from 1 to 7 months (mean 3.8 months). The mean preoperative intraocular pressure (IOP) was $38.6{\pm}6.6mmHg$. The mean final postoperative IOP was $11.7{\pm}3.8mmHg$. Twenty three (88%) of the 25 eyes were successfully controlled with the IOP of less than or equal to 20 mmHg without glaucoma medication. There were early postoperative complications of hyphema in 5 eyes (20%), shallow anterior chamber in 4 eyes(16%), punctate keratopathy in 3 eyes (12%), aqueous leaking from conjunctival wound in 2 eyes (8%), encapsulated bleb in 1 eye (4%) and choroidal detachment in 1 eye (4%), and 4 eyes had long term hypotony lasting more than 2 months. Although Mitomycin C is simple to use and effective adjunct to trabeculectomy, further study will be needed to determine the mechanism of action, indication, dosage and optimal exposure time of Mitomycin C.

• Journal of Korean Ophthalmic Optics Society
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• v.18 no.2
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• pp.165-171
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• 2013

Purpose: This study are to analyze and to compare between pupillary size, reaction time, refractive error, corrected vision, dominant eye, static visual angle (SVA) and kinetic visual acuity (KVA) of male and female college students, to measure KVA of them in full correction and to identify changes of KVA by +0.50 D and -0.50 D spherical power addition respectively in full correction condition. Methods: KVA, SVA, pupillary size, reaction time, refractive error, corrected vision and dominant eye of 40 male and 40 female optical science students were measured by utilizing KOWA AS-4A, reaction time measurement program, subjective refractometer, and objective refractometer, and KVAs were measured when +0.50 D/-0.50 D were added in both eyes respectively. Results: Binocular KVA of whole subjects was $0.45{\pm}0.22$, and in monocular KVAs were $0.36{\pm}0.19$ for right eye and $0.34{\pm}0.19$ for left eye, and binocular KVA was significantly higher than monocular KVA. It appeared that the better SVA was, the better KVA was in significant way, and in terms of refractive error the less myopia amount was, the better KVA was, but it was not significant statistically. The lower astigmatism was, the slightly and significantly higher KVA was when dividing between equal or less than -1.00 D astigmatism group and over -1.00 D astigmatism group. In resulting from correction condition of refractive error KVAs were $0.45{\pm}0.22$ for full correction, $0.26{\pm}0.15$ for +0.50 D addition, $0.48{\pm}0.22$ for -0.50 D addition which indicates that KVA in over myopia correction was significantly the highest and followed by full correction and under correction. Similar findings were revealed in both male and female, and KVA of male was better than female in comparing between male and female. There was no significantly different KVA between dominant eye and non-dominant eye. Conclusions: Accordingly, it is concluded that KVA is related with far distance SVA, astigmatism amount, and refractive error amount except a dominant eye. Through this research, it was found that prescription for enhancing KVA is to make full correction or to overcorrect slightly myopia.

• Journal of Korean Ophthalmic Optics Society
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• v.11 no.3
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• pp.275-280
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• 2006

For this study, we analysed the difference of values between noncycloplegic and cycloplegic autorefraction in primary school children. We classified the elementary school one, two, three grade (8~10age) 79children(158eyes) who did not have strabismus or amblyopia. They were examined by using the Autorefractor in domestic market before and after cycloplegic. Discrepancies beyond 0.50D in spherical and cylindrical power and 20 degree in cylindrical axis were regarded as significant. The percentages of discrepancy were greater in spherical power between noncydoplegic and cycloplegic autorefraction(p<0.05). The percentages of discrepancy were not greater in cylindrical power between noncycloplegic and cycloplegic autorefraction. The percentages of discrepancy were greater in cylindrical axis between noncydoplegic and cycloplegic autorefraction(p<0.05). In conclusion, for the primary school children who did not wear glasses, the prediction table of this study will be helpful to reduce the test error in visual acuity and refractive error tests.

• Journal of Korean Ophthalmic Optics Society
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• v.19 no.3
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• pp.407-412
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• 2014

Purpose: It is investigated whether the time division system can extend the field without diplopia for people with homonymous hemianopia. Methods: The time division system was manufactured by a modified mini fan and a black cardboard. In order to verify the effectiveness of the equipment, subjects with and without the equipment took part in the experiment to bisect the space and to recognize letters. Results: Subjects with and without the equipment showed +8.91 and +18.14 degrees in the experiment to bisect the space. In the experiment reading the letters and numbers with the equipment, there were 9 percentage point increase in $4{\times}4$ charts and 15 percentage point increase in $6{\times}6$ charts. It turned out that there was a remarkable improvement for the worst group for reading the charts. Conclusions: The time division system is effective in the mobility and orientation for people with homonymous hemianopia.

• The KIPS Transactions:PartA
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• v.18A no.4
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• pp.129-134
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• 2011

E-learning in Korea supports different educational needs of diverse learners. E-learning became one of the major source of educational services for schools, higher education, lifelong learning, and for special education. Many e-learning contents offered by cyber universities use HTML, CSS, and Flash, and these are known to have limitations on accessibilities. People with disabilities or aged have problems accessing such contents. The purpose of this study is to evaluate accessibility of Flash e-learning contents offered by 9 cyber universities. AccChecker is used to assess accessibility of the contents. The result shows many errors and warning with Text Equivalents, Keyboard Navigation, Properties, Depth of Tree, and Structures that restrict access. In order to improve the quality and expansion of quality e-learning contents, we need aggressive measures to obtain accessibility of contents, and these should be designed at the planning phase rather than adjusted during the development stage. Furthermore, it is vital to train instructional designers, developers and the CEOs to realize the importance of accessibility and learn appropriate skills to increase accessibilities of e-learning contents.