• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.630-632
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• 2000

경합은 공유메모리 병렬프로그램의 비결정적인 수행결과를 초래하므로, 디버깅을 위해서 경합탐지는 중요하다. 임계구역을 가진 병렬프로그램을 위한 수행중 경합 탐지 기법은 공유 자료구조를 사용하므로, 매 접근 사건 시에 병목현상을 유발한다. 본 연구에서는 동기화가 있는 병렬프로그램에서 매 반복을 수행할 때마다 공유 자료구조의 접근 횟수를 기껏해야 임계구역의 수에 비례하도록 매 접근사건을 검사한다. 그러므로 이 기법은 수행중 경합탐지의 확장성과 효율성을 제공한다.

• Journal of Korea Water Resources Association
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• v.39 no.3 s.164
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• pp.253-259
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• 2006

In almost all previous hydrological studies, the standard approach adopted for nonlinear time series analysis is to perform system characterization first followed by forecasting. However, a practical inverse approach for forecasting nonlinear hydrological time series was proposed recently To investigate the applicability standard approach method and inverse approach, this study used a theoretical time series (Mackey-Glass time series) and daily streamflows of the Bear River in Idaho. To predict a theoretical time series and daily streamflow, this study used local approximation method. From chaos analysis, chaotic characteristics are found in daily streamflow of the Bear River in Idaho. Resulting from 1, 3 and 5-day prediction, inverse approach method is shown to be better than the standard approach for a theoretical chaotic time series and daily streamflow.

• The Journal of Korean Association of Computer Education
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• v.21 no.2
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• pp.59-71
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• 2018

The purpose of this study is suggesting the direction for improving web accessibility by analyzing the state of abiding by the web accessibility by the centers for teaching and learning support at the education offices in cities and provinces which provide the learning and teaching materials to the K-12 members and the interested people. For this aim, nine centers for teaching and learning support were evaluated. The primary manual evaluation by two experts and the evaluation by 18 users were conducted. The users were comprised of hearing-impaired people, visually-impaired people, brain-disabled people, the elderly, various browser users, and a variety of operating system users. As a result of the analysis, not a single center for teaching and learning support had conformed to web accessibility in the expert evaluation and the user evaluation. As a result of the expert evaluation, the errors regarding web design improvement, HTML source error correction, and provision of alternative measures for the disabled were found. This study is meaningful in the sense that it provided various discussions with regard to the direction of the future web accessibility evaluation based on the improved web accessibility evaluation method.

• Journal of the Korean Society for Library and Information Science
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• v.53 no.4
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• pp.231-254
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• 2019

Library website is medium for connecting library information resources and users. However, searching and accessing methods to information resources in library websites and retrieval systems are mostly designed for users. So, the disabled users have difficulty accessing and using library information resources through library websites. Therefore, the author carried on current status study and analysis on the retrieval system of the national and public library websites in Korea. And then, the author proposes improvement plan in order to enhance satisfaction with information needs of disabled users and to use a basic study for construction of retrieval system of library websites for disabled users.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1156-1160
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• 2009

기후변화가 국지적이 아닌 전지구적인 형태로 발생한다고 할 때, 기후변화로 인한 국내 수자원의 영향을 분석하기 위해서는 인접한 국가들과의 연계 분석을 수행하는 것이 필요하다. 이를 위해서는 미 접근지역의 수문자료 및 지형자료구축이 가능해야 하며 자료의 시공간적 해상도에 적합한 모형 선정이 이루어져야 한다. 본 연구에서는 유출 해석을 위해 전구 규모의 유출해석이 가능한 VIC 모델을 선정하였으며, 대유역의 적용성을 평가하기 위해 $1/8^{\circ}$로 격자크기를 구성하여 한반도에 적용하였다. 유출해석을 위해 필요한 입력자료는 전 지구에 대해 제공하고 있는 자료를 이용하였다. 연 평균 유출량 분석을 통해 모의결과의 정확도를 분석하였으며 이상의 결과를 통해 향후 동아시아와 같은 미 접근지역에 대한 적용성을 간접적으로 확인하였다.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.195-196
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• 2017

본 연구는 모바일 간편결제시스템에 대한 신뢰 형성에 영향을 미치는 주요 요인을 개인적인 측면과 시스템적인 측면에서 도출해내는 것에 목적을 두고 있다. 개인적 특성으로는 개인의 혁신성과 익숙함이 포함되고, 시스템적 특성으로는 편의성, 접근성, 호환성이 포함된다. 또한, 이러한 개인의 혁신성과 익숙함, 편의성, 접근성, 호환성은 사용자의 신뢰에 영향을 끼치게 된다. 사용자의 신뢰향상은 모바일 간편결제시스템의 지속사용을 이끄는데 중요한 선행변수로 작용될 수 있다. 본 연구를 위해 부산과 대구지역의 대학생을 대상으로 설문을 실시하였으며, SPSS와 PLS를 이용해 자료를 분석하였다. 분석결과, 개인측면의 요인과 시스템적 요인이 사용자의 신뢰에 영향을 끼치는 것으로 나타났다. 이러한 연구결과는 모바일 간편결제시스템의 신뢰형성과정을 살펴볼 수있다는 점에서 의의를 가지게 된다.

• Journal of the Korean Society for Library and Information Science
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• v.48 no.1
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• pp.415-439
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• 2014

The purpose of this study is to analyze mobile web accessibility of public libraries. To achieve this, accessibility checklists were driven from mobile web and application guidelines. The study also conducted automatic and manual evaluations. As results, the study found that text alternatives for resource image, main menu, image for text contents were mainly missing. In addition, focus for retrieval, operating system accessibility for retrieval, and id & password label, color difference for library calendar and seat reservation, brightness difference for main manu and resource display, and space between controls for retrieval were mainly missing. The study also suggested focal missing areas for main library services. It will be utilized as checklists for development of mobile services.

• Journal of the Korean Society for information Management
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• v.28 no.3
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• pp.197-217
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• 2011

Web accessibility refers to the practice of providing equal access to web sites to people without and with disability. This study aims to investigate the web content accessibility of 153 university libraries in Korea, and further suggest the approach to implement an effective university library web site to meet Korean Web Content Accessibility Guidelines(KWCAG). Survey was conducted with two steps. The first step was to find out the general level of web accessibility of all university library web sites using an automatic appraisal tool, KADO-WAH2.0, and the detailed examination of web accessibility check items was limited to 19 web sites which proved excellent in automatic appraisal. Regretfully, the result says that there is no perfect web site. Therefore every university library is advisable to make good use of the findings to meet all the requirements of KWCAG. In particular, the basic requirements, such as voice service, resizing and highlighting text, must be fulfilled by priority and to almost all contents.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.341-341
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• 2017

토석류는 기본적으로 강우에 기인하는 산지재해이다. 따라서 국토의 64%가 산지인 동시에 여름철 강우가 집중되는 우리나라의 특성상 토석류가 발생할 가능성이 상당히 크다. 또한 최근 높은 인구밀도로 인하여 불가피하게 토석류 발생 시 큰 인명피해마저 우려되고 있는 실정이다. 토석류저감을 위해서 FLO-2D, RAMMS, DEBRIS-2D 등의 다양한 수치해석 프로그램들이 개발되어왔다. 이러한 프로그램들을 통해 토석류를 해석하려면 조사하려는 지역의 지형자료를 습득하는 것이 선행되어져야 한다. 하지만 토석류 재해지역의 접근성 및 위험성을 감안할 때 해당 지역으로의 접근이 곤란하여 지형자료를 직접 얻는 것은 어려운 경우가 대부분이다. 본 연구에서는 토석류 재해 위험지역에서 드론촬영을 실시하여 후처리 프로그램을 통해 해당 지역의 DEM을 생성하였다. 생성한 DEM이 효용가치를 지니려면 실제 지형과의 차이를 최소한으로 가져야 한다. 따라서 드론촬영으로 생성한 DEM을 수치지도를 통해 생성한 DEM과 비교하여 좌표의 편차, 고도의 편차 등을 계산하였다. 또한 각각의 DEM 자료에 FLO-2D를 적용하여 토석류 재해 위험지역에 설치된 사방시설의 저감능력을 확인해보았다. 두 DEM의 비교분석을 통해 드론촬영으로 생성한 DEM이 충분한 실용성을 지니고 있음을 확인하였고, 또한 해당 지점에 설치된 사방시설의 저감능력을 다방면으로 확인할 수 있었다. 연구결과, 현재 급부상하고 있는 드론을 통해 사방사업을 효율적으로 진행할 수 있음을 확인하였다. 이는 토석류 저감 부문에서 큰 효과를 발휘할 것으로 기대된다.

• Journal of the Korean earth science society
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• v.41 no.2
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• pp.137-146
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• 2020

A great number of geological research data have been produced by individually conducted researchers and then personally stored in domestic universities and research institutes. However, it is difficult to share data with other researchers owing to low and limited accessibility. The purpose of this study is to systematically establish metadata for inaccessible data, to manage them collectively and to provide opportunities for utilizing the data to those who require efficient research methods. Approximately 1,000 geological specimens (900 rocks and fossils, 100 thin sections) were gathered, along with their metadata such as high-resolution photographs, classification, name, owner, address, and geographical coordinates of the sample site, to establish their features. Additionally, 3D modeling data for 100 rocks and fossils were generated. On the basis of this study, it is possible for researchers to access and share crucial geological data that have a high potential to be lost and have been neglected in restricted spaces; by avoiding the wasted time, energy, and costs caused by repetitive collection of data, researchers may perform effective research and achieve qualified and competitive research results. Moreover, vulnerable and important geological data in the field can be protected from damage caused by indiscriminate, repetitive collection of specimens that have previously been secured. Through the establishment of additional metadata concerning the diversity of rocks, fossils, and thin sections kept at other universities and research institutes, much more data can be recognized, leading to advanced research results. Furthermore, specialized comparison and analysis of basic mineralogy and petrology knowledge are anticipated, based on the use of the metadata.