• The Journal of Korean Association of Computer Education
• /
• v.7 no.3
• /
• pp.67-78
• /
• 2004

Since the 7th National Curriculum was established, ICT has emerged as an indispensable tool for teaching a variety of subjects in K-12 education systems. This paper develops the model for explaining the factors affecting students' satisfaction level in using web contents for science class. Based on data collected from a questionnaire survey from the students who evaluated the web sites providing the information related to the science subject, the structural equation model is presented. From this model, a following conclusion is provided : credibility and understandability/motivation are the most important factors affecting the level of satisfaction, but the presentation method, the screen design as well as contents itself has indirect impact on user satisfaction through understandability/motivation. Other interesting results are also provided. This result might provide the useful guidelines for designing the web-contents for science class in high school.

• 한국정보교육학회:학술대회논문집
• /
• 2004.01a
• /
• pp.20-26
• /
• 2004

정보통신기술의 발달에 따라 인터넷에 대한 급증하면 학생들과 교사들의 교육용 사이트에 대한 정보를 제공할 필요가 있다. 교육용 웹사이트를 평가함에 있어 학생과 교사간에 인지발달 수준이나 그 입장에 따라 여러 가지 차이가 있다고 본다. 교사나 전문가 입장에서 우수하다고 판단되는 교육용 웹사이트가 실제로 학생들에게도 우수하다고 인식되는지 살펴볼 필요가 있다. 이에 본 연구에서는 교육용 웹사이트를 평가함에 있어 교사와 학생의 인식 차이를 살펴보고자 한다. 이는 학생이 교육용 사이트를 평가하는 관점을 이해하고 교육용 웹사이트 설계 및 평가 시 보다 학생들의 관점을 고려할 수 있는 방안을 모색하는데 도움이 될 것이다.

• 한국IT서비스학회:학술대회논문집
• /
• 2009.05a
• /
• pp.401-404
• /
• 2009

최근 웹 사용의 증가로 인하여 효과적인 웹 사이트 개발을 위해서 다양한 기술들이 개발되었다. 그 중 Ajax의 비동기적 새로고침 기능을 사용하면 페이지 일정 부분을 자동으로 업데이트 할 수 있다. 이러한 장점 때문에 Ajax의 성능을 정략적으로 보이기 위한 연구들이 진행되었다. 하지만 기존의 Ajax 평가 방법은 일부 평가 항목(데이터 크기, 단순한 Ajax와 Non-Ajax)만 고려하기 때문에 종합적인 성능평가 방법을 제안하지 못했다. 따라서 이 논문에서는 Ajax를 이용한 효과적인 웹 사이트 개발을 위해 기존 연구의 문제점을 보완하여 Ajax와 Non-Ajax의 전송 데이터 사이즈를 같게 하여 다양한 언어(HTML, XML, JSP)로 평가 비교하였다.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.16 no.1
• /
• pp.66-71
• /
• 2006

Lately teaching-learning system on the web site offers broad educational environment without any restriction of time and place to the teachers and learners. Using a web site in music education turned out to be effective. It provokes learner's interest and guides self-directed learning. Therefore, on this research, the web site for self-directed learning in music subject was designed and embodied as an assistant material of learning which is suitable for learner's level and demand As a result of using the web site in music class, there are some responses of students. First, there were 27 students positive responses$(79.4\%)$ of 34 students in the learning effect of the web site, and 25 students$(73.5\%)$ of 34 showed their will to use the web site continually if it is modified and supplemented. Second, some students answered that using this program in Diagnosis Evaluation and Formative Test could have an instant result, which was used for the material of feedback. Third, there was a positive evaluation of helping self-directed learning.

• Tunnel and Underground Space
• /
• v.12 no.1
• /
• pp.52-69
• /
• 2002

The WIPP (Waste Isolation Pilot Plant), located 42km east of Carlsbad, New Mexico (NM), in bedded salt 655m below the surface, is a mined repository constructed by the US DOE for the permanent disposal of transuranic (TRU) wastes generated by activities related to defence of the US since 1970. Its historical disposal operation began in March 1999 following receipt of a final permit from the State of NM after a positive certification decision for the WIPP was issued by the EPA in 1998, as the first licensed facility in the US for the deep geologic disposal of radioactive wastes. The CCA (Compliance Certification Application) for the WIPP that the DOE submitted to the EPA in 1966 was supported by an extensive performance assessment (PA) carried out by Sandia National Laboratories (SNL), with so-called 1996 PA. Even though such PA methodologies could be greatly different from the way we consider for HLW disposal in Korea largely due to quite different geologic formations in which repository are likely to be located, a review on lots of works done through the WIPP PA studies could be the most important lessons that we can learn from in view of current situation in Korea where an initial phase of conceptual studies on HLW disposal has been just started. The objective of this art report is an overview of the methodology used in the recent WIPP PA to support the US DOE WIPP CCA and some relevant results completed by SNL.

• Journal of Korea Multimedia Society
• /
• v.8 no.4
• /
• pp.439-449
• /
• 2005

Distributed main memory database management systems (DMM-DBMSs) store the database in main memories of the participating sites. They provide high performance through fast access to the local databases and high speed communication among the sites. Recently, a lot of research results on DMM- DBMSs has been reported. However, to the best of our knowledge, there is no known research result on the performance of the catalog management schemes for DMM-DBMSs. In this work, we evaluated the performance of the partitioned catalog management schemes through experimental analysis. First, we classified the partitioned catalog management schemes into three categories : Partitioned Catalogs Without Caching (PCWC), Partitioned Catalogs With Incremental Caching (PCWIC), and Partitioned Catalogs With Full Caching (PCWFC). Experiments were conducted by varying the number of sites, the number of terminals per site, buffer size, write query ratio, and local query ratio. Experiments show that PCWFC outperforms the other two schemes in all cases. It also means that the performance of PCWIC gradually increases as time goes by. It should be noted that PCWFC does not guarantee high performance for disk-based distributed DBMSs in cases when the workload of individual site is high, catalog write ratio is high, or remote data objects are accessed very frequently. Main reason that PCWFC outperforms for DMM-DBMSs is that query compilation and remote catalog access can be done in a very high speed, even when the catalogs of the remote data objects are frequently updated.

• Journal of the Korean Society for information Management
• /
• v.27 no.1
• /
• pp.7-24
• /
• 2010

This study tried to develop the confidence indicators and evaluation factors of credibility according to the types of online information by nationwide large scale online survey. The main results are summarized as follows: i) confidence indicators by types of online information: information on news sites(72.553), financial companies(68.894), government sites(67.938), cafe(66.464), portal sites(65.001), collective intelligence sites(63.489), nonprofit organization (63.392), company/corporation sites(59.789), blog(59.066), online community sites(55.609), e-commerce sites(55.118), mini-homepage(50.695). ii) 'Widely known site' or 'famous site' is the most important factor for all types of online information. User opinions like as posting or comment are major factors for sites of cafe, blog, mini-homepage, online community, collective intelligence etc. and 'name recognition' and 'reputation' are main factors for site of financial company, corporation, government, nonprofit organization.

• Journal of the Korean Society for Library and Information Science
• /
• v.52 no.1
• /
• pp.87-112
• /
• 2018

The objective of this research is to measure the quality of web accessibility of Tripitaka Koreana websites. To achieve this research aim, three typical websites were selected, and conducted both the system-based evaluation and the user-based evaluation using the six common indicators. It found that no website satisfied with the 95% accessibility level in all six indicators, and users were more likely to respond positively to the high level of web accessibility results from the system-based evaluation (i.e., providing alternate texts, providing titles, displaying the basic languages, performing user requests, and providing labels). We suggested some ideas to increase the web accessibility based on the results of analysis.

• Journal of the Korean Home Economics Association
• /
• v.39 no.7
• /
• pp.145-163
• /
• 2001

The purpose of this study was to evaluate counseling services in consumer counseling sites. We analyzed the contents and services of consumer counseling from the following internet sites; http : //www . gcn. or. kr , http : //www. jubuclub. or. kr, http : //www. cacpk. erg, http : //www . tor. co. kr/~ consumer, http : //civ. miriman. co. kr, http ://my. netian .com/~rokmc9. The major findings were summarized as follows: (1) All sites provided both a lot of information on consumer affairs and services for consumer counseling. (2) Two out of six private consumer counseling sites were technically inappropriated. They are wow.gen.or.kr and cia.miriman.co.kr (3) Consumer counseling services with specialized information and laws on consumer affairs were more likely provided from sites of consumer organizations than personal sites. (4) Personal sites made more consumer friendly communication than organization sites.

• Review of KIISC
• /
• v.23 no.6
• /
• pp.13-20
• /
• 2013

전자금융서비스 활용이 급격히 증가함에 따라 (예) 인터넷 자동이체, 조회) 이를 악용한 범죄 역시 증가하고 있다. 특히, 금융서비스 제공자를 사칭한 문자 메시지나 이메일을 전송하여 실제와 유사한 허위 URL에 접속하도록 유도하는 파밍 공격이 이러한 범죄의 대표적인 예이다. 이에 따라 다양한 대응방안들이 등장했지만 이들은 공통된 취약점이 존재한다. 기존 사이트들의 적극적인 참여가 필요하며, IP주소의 위조에 취약하다는 것이다. 이와 같은 문제점을 해결하기 위해 본 논문은 인터넷 주소 등록기관을 통한 URL 검증 기법을 제안한다. 제안된 기법에서는 주어진 URL의 등록기관 및 국가를 검증하여 악성 사이트로 유도하는 URL을 탐지한다. 제시된 방법의 정확도를 평가하기 위해 인터넷 금융과 관련된 총 44개 URL의 등록기관 및 국가를 검증해 보았으며, 90%이상의 정상 사이트 및 80% 이상의 비정상 사이트를 정확히 판별해 낼 수 있음을 확인하였다.