• Journal of Korean Ophthalmic Optics Society
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• v.14 no.3
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• pp.51-57
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• 2009

Purpose: The purpose of this study was to determine if monocular and binocular accommodative facility tests would be useful in diagnosing general binocular dysfunctions. Methods: 95 symptomatic children, who were selected from comprehensive vision tests, were classified into four groups (29 subjects with accommodative dysfunctions, 28 subjects with vergence dysfunctions, 25 subjects with combined accommodative and vergence dysfunctions, 13 subjects with normal binocular functions). Monocular and binocular accommodative facility was measured with ${\pm}$2.00 D flipper lenses. Results: Statistical analysis revealed that binocular accommodative facility measurement was significantly lower than monocular accommodative measurement in the vergence dysfunction group (p<0.01). However, there were no differences between monocular and binocular accommodative facility measurements in the group of accommodative or combined accommodative and vergence dysfunction (p>0.05). In addition, subjects with general binocular dysfunctions performed significantly poorer than subjects with normal binocular function on monocular and binocular accommodative facility (p<0.000). Conclusions: As a result of this study, monocular and binocular accommodative facility test, which could differentiate dysfunction from normal as well as between dysfunctions, indicated useful means for diagnosis of general binocular dysfunctions.

• Journal of Digital Convergence
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• v.9 no.4
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• pp.169-179
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• 2011

The purpose of this study are as follows. First, to analyze digital convergence level of convergence generation to demographic variables. Second, the convergence level to digital device and using frequency to digital service. Third, the convergence level to digital service and using frequency to digital service. The research methods FGI, the interview with IT expert group and survey. The results of research are as follows. First, 30 aging, expert group, higher education group over graduate school are actively using and participated. Second, high level of convergence device are smart-phone, tablet PC, net-book are in order. high level of convergence service are SNS service, twitter, uee, portal messenger and app store, e-Book, web hard are in order. Third, The convergence generation enjoying app-store of smartphone, wireless game and more participating facebook/cyworld twitter, Portal, internet community.

• Information and Communications Magazine
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• v.29 no.7
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• pp.38-46
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• 2012

최근, 디지털 컨버전스 현상이 여러 분야에 걸쳐 일어나고 있으며, 그 중 디바이스 간의 융합이 대표적인 사례라고 할 수 있다. 디바이스 간의 융합은하나의 디바이스만으로도 많은 서비스를 이용 가능하게 만들고 있다. 이러한 디지털 컨버전스 디바이스의 서비스를 쉽고 편하게 이용하기 위해 디바이스와 직관적으로 상호작용을 할 수 있는 사용자 인터페이스의 설계는 매우 중요하다. 그러나 현재 디지털 컨버전스 디바이스에서 사용 중인 사용자 인터페이스는 이에 부합하기에는 아직 최고의 성능(Quality)과 가치 (value)를 발휘하지 못하고 있다. 따라서 본 고에서는 디지털 컨버전스 디바이스를 위한 차세대 인터페이스 입력신호로 시용되고 있는 생체신호(근전도, 안전도, 뇌전도)에 대해 알아보고, 이와 같은 생체신호를 기반으로 하는 사용자 인터페이스 시스템들의 국내외 연구 개발 동향에 대하여 살펴본다.

• Journal of Korean Ophthalmic Optics Society
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• v.18 no.4
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• pp.481-487
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• 2013

Purpose: The purpose of this study was to investigate the correlation between non-strabismic binocular dysfunctions and academic achievement for primary school children. Methods: A total of 1,123 parents and their children aged 8-13 years responded to the College of Optometrists in Vision Development Quality of Life (COVD-QOL) questionnaire. Among the all participants, 123 children who have ${\geq}20$ of visual symptom scores, no amblyopia, no strabismus, no any ocular and systemic pathology, and no contact lenses wearing were chosen for this study finally. Binocular functions were evaluated for final subjects. Results: Of 123 primary school children who have criteria-eligible symptoms 93 had non-strabismic binocular dysfunctions. Accommodative dysfunction was significantly correlated to subjects of science and English, and vergence dysfunction was also significantly correlated to Korean, mathematics, social science, science and English in the final subjects. Conclusions: Correlations between academic achievement and accommodative/vergence dysfunctions were statistically significant. Therefore, accommodative/vergence dysfunctions may be factors to affect academic achievement.

• TTA Journal
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• s.104
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• pp.19-22
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• 2006

DMB는 첨단 휴대이동 멀티미디어 디지털방송 서비스로서 텔레매틱스 및 ITS 분야에서 필요로 하는 다양한 정보서비스의 전송채널로서 최고의 역할을 수행할 것으로 기대되고 있다. 이미 ITS분야에서는 DMB를 전송 플랫폼으로 하는 교통 및 여행자정보 전송규격의 국제표준화가 추진되어 왔다. 이번호에서는 언제 어디서나 교통정보의 제공을 가능하게 하고 DMB의 양방향 서비스를 앞당김으로써 유비쿼터스 사회를 촉진시키게 될‘DMB + 텔레매틱스/ITS 컨버전스 관련 표준화 및 서비스의 현황과 전망’에 대해 이상운 TTA DMB PG 의장으로부터 알아본다

• IT SoC Magazine
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• s.18
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• pp.10-24
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• 2007

본 코너에서는‘07년 1월호 핫이슈에서 다룬‘IT부품 2007-2012 기술로드맵’을 토대로 홀수 월에 각 분야별로 시장/기술 동향, 표준화/정책 동향 및 기술로드맵을 상세히 다루고 있습니다. 독자 여러분께서도 본 내용과 관련하여 중장기적으로 반드시 포함해야 할 중요한 연구개발 테마가 있으면 IITA의‘IT부품/융합기술 전문위원실’에 알려주시기 바랍니다. 준비한 기술로드맵을 참고하여 차기 기술개발 테마를 발굴해 나갈 예정입니다. 이번호에서는‘통방/멀티미디어 컨버전스 부품 기술로드맵에 대해서 다룹니다.

• Digital Contents
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• no.12 s.127
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• pp.20-21
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• 2003

한국인이 만들고 전세계 석학들과 오피니언 리더들이 주목하고 있는 프로그램이 있다. 일반인들에게는 다소 생소하지만 논문이나 학술자료 등을 자주 작성해야 하는 교수, 연구원, 석 · 박사 과정의 학생들에게는 혁신적인 소프트웨어로 인정받고 있는‘스칼라스에이드’가 바로 그것이다. 현재 전세계 88개국에서 30만명 이상이 사용하고 있는 이 프로그램은 각주나 레퍼런스(인용문구 및 출처)를 자동으로 작성할 수 있도록 할 뿐만 아니라 전세계 200여 도서관의 서지자료와 원문을 손쉽게 입수하고, DB화 할 수 있도록 한다. 얼마전‘스칼라스에이드4 한글판 패키지’버전을 발표한 나도영 스칼라스에이드 사장을 만났다.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.3
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• pp.131-135
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• 2007

To investigate whether vision therapy (vision training) are an effective way to influence the near point of convergence, fusion range and asthenopic symptoms in convergence insufficiency. For one chosen patient who had convergence insufficiency, vision therapy (vision training) was prescribed for 4 weeks. 4 weeks later vision therapy (vision training) was quite effective in convergence insufficiency. That is, vision therapy (vision training) was an effective means of reducing symptoms, improving fusion range and decompensating exophoria in patient with convergence insufficiency.

• Information Systems Review
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• v.11 no.1
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• pp.19-47
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• 2009

Many products today tend to adopt a convergence approach by adding new features or functionalities to the existing products. The convergence, however, results in both positive and negative effects on usage of products, and thus demonstrates the characteristics called "paradox of technology." On the one hand, the added functionalities or features will increase the usefulness of the products. On the other hand, the convergence increases complexity of learning and usage of products and may decrease satisfaction or user evaluations. This study provides an empirical evidence of this paradox through investigation of telematics, one of the exemplary products of convergence services. Our research model is designed to test the existence of the "paradox of technology" and includes variables such as variety of functions, complexity of usage, perceived usefulness, service evaluation, and service fit. The proposed research model and subsequent hypotheses are empirically tested using 149 survey responses from telematics users. We have found that the variety of functions is positively associated with perceived usefulness, but is negatively associated with the complexity of usage. The data analysis reveals that the perceived usefulness has more significant impacts on service evaluation than the complexity of usage does. Furthermore, the strength of causal relationships among these variables is partially moderated by the degree of service fit. This study thus highlights the paradox of technology in explaining user attitudes and beliefs associated with convergence services.

• The Journal of the Korea Contents Association
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• v.7 no.8
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• pp.21-30
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• 2007

Due to the growth of embedded systems and the development of semi-conductor and storage devices, digital convergence devises is ever growing. Digital convergence devices are equipments into which various functions such as communication, playing movies and wave files and electronic dictionarys are integrated. Example are portable multimedia players(PMPs), personal digital assistants(PDAs), and smart phones. Therefore, these devices need an efficient file system which manages and controls various types of files. In designing such file systems, the size constraint for small embedded systems as well as performance and compatibility should be taken into account. In this paper, we suggest the partial buffer cache technique. Contrary to the traditional buffer cache, the partial buffer cache is used for only the FAT meta data and write-only data. Simulation results show that we could enhance the write performance more than 30% when the file size is larger than about 100 KBytes.