• Proceedings of the Korea Contents Association Conference
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• 2016.05a
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• pp.41-42
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• 2016

본 연구는 국내 주요 연구기관 사이트를 대상으로 웹 접근성 실태 조사를 하였다. 연구기관의 구체적인 웹 접근성 준수 실태 파악을 위해 자동화 평가도구인 K-WAH 4.0을 사용하였다. 평가 결과 국내의 20여개의 연구기관 중 6개의 연구기관만이 웹 접근성 마크를 획득하였으며 획득한 연구기관의 준수율은 96%, 획득하지 못한 연구기관의 준수율은 86%, 전체 평균 준수율 89%로 접근성 마크를 획득한 연구기관이 획득하지 못한 연구기관에 비하여 다소 높은 것으로 나타났지만 웹 접근성마크를 받은 연구기관 중 웹 접근성을 100% 준수하는 사이트를 발견하지 못하였다. 이에 본 연구에서는 연구기관 사이트 중 잘 지켜지지 않은 항목들을 파악한 후 국내 연구기관 웹 사이트의 접근성 수준 향상에 기여하고자 한다.

• ETRI Journal
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• v.31 no.2
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• pp.162-172
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• 2009

A linear-prediction-based blind equalization algorithm for single-input single-output (SISO) finite impulse response/infinite impulse response (FIR/IIR) channels is proposed. The new algorithm is based on second-order statistics, and it does not require channel order estimation. By oversampling the channel output, the SISO channel model is converted to a special single-input multiple-output (SIMO) model. Two forward linear predictors with consecutive prediction delays are applied to the subchannel outputs of the SIMO model. It is demonstrated that the partial parameters of the SIMO model can be estimated from the difference between the prediction errors when the length of the predictors is sufficiently large. The sufficient filter length for achieving the optimal prediction is also derived. Based on the estimated parameters, both batch and adaptive minimum-mean-square-error equalizers are developed. The performance of the proposed equalizers is evaluated by computer simulations and compared with existing algorithms.

• The Korean Journal of Applied Statistics
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• v.25 no.6
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• pp.947-958
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• 2012

When modeling event times in biomedical studies, the outcome might be incompletely observed. In this paper, we assume that the outcome is recorded as current status failure time data. Despite well-developed literature the routine practical use of many current status data modeling methods remains infrequent due to the lack of specialized statistical software, the difficulty to assess model goodness-of-fit, as well as the possible loss of information caused by covariate grouping or discretization. We propose a model based on pseudo-observations that is convenient to implement and that allows for flexibility in the choice of the outcome. Parameter estimates are obtained based on generalized estimating equations. Examples from studies in bile duct hyperplasia and breast cancer in conjunction with simulated data illustrate the practical advantages of this model.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.449-453
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• 2008

정보와 환경의 급속한 발전에도 불구하고 고령자, 장애인 등은 웹 서비스를 포함한 보편적 서비스를 받지 못하고 소외되고 있다. 본 연구는 최근 활발하게 이루어지고 있는 공공 및 사설 교육 사이트의 E-Learning이 웹 접근성 표준 평가 항목인 '한국형 웹 콘텐츠 접근성 지침'(Korea Web Contents Accessibility Guide 1.0)을 준수 여부를 웹 접근성 평가도구를 사용하여 측정 및 분석하고, 정보격차의 해소를 위한 방향을 제시하였다.

• Proceedings of the Korea Concrete Institute Conference
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• 1995.10a
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• pp.267-272
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• 1995

The objective of this study is to investigate the effect of concrete strength on the stirrup effectiveness factor(K) of reinforced concrete beams with stirrup based on previous test results(a/d$\geq$2.5). In the procedure of the estimation of K, it was assumed that the ultimate shear strength for beams without stirrup is equal to the concrete contribution to shear strength for beam with stirrup. A model equation for calculation the stirrup of compressive strength of concrete. It was shown that the stirrup effective factor of compressive strength of concrete. It wah shown that the stirrup effective factor is greater than 1.0 up to compressive strength 85MPa. Therefore the current ACI Code equation for predicting the shear strength and the stirrup effectiveness factor of 1.0 is conservative for nomal and high stength concrete beams with stirrup.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.533-536
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• 2007

최근 웹 표준의 준수와 웹 접근성 향상을 위한 노력이 기업체에서 뿐만 아니라 공공기관 등에서도 확산되고 있으며, 필수 요소로 자리매김하고 있는 추세이다. 인터넷을 사용하는 환경은 개인용 컴퓨터의 윈도우 기반에서 인터넷을 사용하는 환경과 시대에서 벗어나고 있다. 학생들의 인터넷 사용 환경도 핸드폰, PDA 등의 모바일 기기를 이용한 다양한 플랫폼으로 확산되고 있는 실정이며, 이에 따라 교육용 홈 페이지에서도 웹 접근성 향상을 위한 노력이 필요한 때이다. 이 논문에서는 한국형 웹 콘텐츠 접근성 지침에 대하여 알아보고, 일선 학교에서 운영하는 교육용 홈 페이지에서 웹 접근성 향상을 위한 방법으로 웹 콘텐츠 접근성 지침에 따른 평가 방법을 도입하는 방안을 제안한다.

• Journal of Computational Design and Engineering
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• v.3 no.2
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• pp.102-111
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• 2016

In this paper, we study the problem of computing smooth feature curves from CAD type point clouds models. The proposed method reconstructs feature curves from the intersections of developable strip pairs which approximate the regions along both sides of the features. The generation of developable surfaces is based on a linear approximation of the given point cloud through a variational shape approximation approach. A line segment sequencing algorithm is proposed for collecting feature line segments into different feature sequences as well as sequential groups of data points. A developable surface approximation procedure is employed to refine incident approximation planes of data points into developable strips. Some experimental results are included to demonstrate the performance of the proposed method.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2007.05a
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• pp.91-100
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• 2007

Understanding the importance of web accessibility as the solution for digital divide, this study recognizes the problem that existing web accessibility researches have been conducted only by governmental administrative organizations and the accessibility researches of web service that is frequently used in every day life are rare. For the research on the actual condition of web-accessability, this study selected the e-mail service of the representative web-service providers - Daum, Naver, and Empas. Through this evaluation research, this study is intended to present a way to provide convenient and efficient service for those who have been alienated from information. For the accessibility evaluation, the automation evaluation tool "KADO-WAH 2.0" was used. And then, source analysis and manual evaluation using Firefox were conducted to see if 'web contents accessibility guideline 1.0' had been kept.

• Journal of Service Research and Studies
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• v.3 no.2
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• pp.33-44
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• 2013

As the Internet and mobile services increase, the use of wired/wireless web contents services increase and the demand for various contents explosively grows. To survive in competitive market, and to minimize the errors and warnings for web accessibility and standardization, and then to maximize the web usability, the periodical evaluation for web site should be performed with the events of web marketing and campaign. Through the web evaluation, the errors for technical programming language and contents offering can be found and diagnosed. In this paper, the quantitative and qualitative evaluation method for web site providing web contents are presented, and the analytic results for the 138 home pages in domestic are evaluated to validate the quantitative methodology. The accessibility, standardization, and usability factor are adopted for the evaluation in which accessibility is evaluated for perceivable, operable, understandable, and robust discipline with K-WAH(Korea-Web Accessibility Helper) tool, the standardization are measured for the number of errors and warnings in technical language with the W3C validator, and finally the usability factor is analyzed for the number of visits, average visit duration, and bounce rate with Google Analytics. In addition to, the quantitative analysis is also performed with the consideration of cost for construction and operation of web site. From the results, in the case of total score of 100 in conversion with relative weight, the average and standard deviation are evaluated to be 55 and 14, respectively. The correlation analysis indicates that the coefficient is estimated as 0.058, and then correlation between the quantitative results and cost is evaluated to be a little positive.

• Journal of Korean Society of Steel Construction
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• v.26 no.4
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• pp.263-275
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• 2014

In this study, connection of steel reinforced concrete(SRC) column and composite beam which consists of H-section and U-section members were tested under cyclic loading. An essential point of the composite beam is the structural performance of welded joint between the H-section and the U-section members. To improve the structural performance of joint of two beam members, vertical stiffeners, trapezoidal stiffeners, and top bars were used. Five full-scaled specimens were designed to study the effect of a number of parameters on cyclic performance of connections such as H-section beam size($H-500{\times}200{\times}10{\times}16$, $H-600{\times}200{\times}11{\times}17$), the presence of stiffeners and top bars, and the presence of no weld access hole(WAH) method. Based on the test results, deformation capacity of the specimens with H-500 series beam and H-600 series beam were 4% and 3% rotation angle, which is the requirement for the Special Moment Frame and Intermediate Moment Frame(IMF), respectively. Test result showed that deformation capacity of connection with stiffeners and top bars is greater than that of connection without stiffeners and top bars. Finally, energy dissipation capacity and strain profile of specimens were summarized.