• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.229-237
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• 2020

This study attempted to share the results of real-time online tests in online classes conducted by 33 students in the 4th grade of the department of nursing, K University, and to suggest ways to secure fairness in real-time online tests. Real-time online testing in this study utilized zoom cloud meetings. Students were invited to participate in the meeting at the same time with a desktop or laptop, including a mobile phone, and the instructor displayed a single question in real time on the screen and collected answers using private talk. Through this method, students' monitor screen, keyboard, mouse, and posture were monitored and controlled. As a result of the survey on the real-time online test, 93.8% of students answered that they were fair and satisfied overall, and 90.6% said they were willing to recommend the online test to others. In the upcoming future, remote lectures and online tests will become more active, so efforts should be made to gradually expand to other tests by developing a fairer, more systematic and easy-to-use online testing method.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.241-243
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• 2000

환경부나 지방자치단체에서는 환경문제를 사전에 예방할 수 있는 체계를 마련하기 위하여 오염물질 배출업체가 환경감시 시스템을 통하여 환경오염물질의 배출상태를 실시간으로 측정하여 공시하도록 의무화 하고 있다. 그러나 환경단체나 지역주민들은, 환경부나 지방자치단체에 제공된 환경정보에 대한 신뢰감이 부족한 현실이다. 본 논문에서는 환경정보의 신뢰성 제공을 위하여 암호학적 인증 메커니즘을 이용한 환경정보 인증 서브 시스템을 설계, 구현하였다. 제시한 환경정보 인증시스템에서는 클라이언트/서버간 인증, 환경정보에 대한 무결성 보장 및 접근통제, 감사기록의 기능을 제공한다.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04b
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• pp.469-471
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• 2001

오늘날 공동작업 환경을 필요로 하는 그룹에 있어서 그룹내의 구성원들은 보다 효율적인 정보의 교환과 공유를 원한다. 따라서 그룹에서 발생한 정보의 공유와 체계적인 관리, 구성원간의 실시간 의사교환 등의 기능을 지원하는 공동작업시스템이 필요하게 되었다. 이러한 요구를 충족시키는 통합 시스템으로 정보의 공유공간과 문서의 관리 그리고 실시간 메시지 전달 기능을 제공하는 CoWare 시스템이 개발되었다. 기존 CoWare 시스템은 CGI 기반으로 개발되어 코드의 재사용이 어렵고, 서버가 과부하 되는 문제점이 있다. 본 논문에서는 이를 보완하고자 컴포넌트 기반으로 시스템을 재 설계함으로써 서비스의 질과 서버의 확장성 및 성능을 향상시켰다. 또한, 다중 사용자 요청을 효과적으로 처리하고 안정적인 서비스를 지원하기 위하여 MTS를 이용하여 개발하였다.

• Journal of Digital Convergence
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• v.15 no.4
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• pp.27-34
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• 2017

As information technology has been developed in a rapid way, a lot of users get to be familiar with social media. Accordingly, the possibility of social media for educational use has increased. From the view point of learning, social media help learners make communities of practice that can lead to collective intelligence. In this study, two different types of social media, synchronous and asynchronous, were compared in terms of usage patterns in the e-learning settings of college level. Content analysis has figured out four factors: learning content, tasks and assignments, emotional communications, and chatting. There found to be a statistical differences in the postings in all of the factors except tasks and assignments. In the qualitative interviews, the participants told various usage patterns of synchronous and asynchronous social media. In sum, the learners generally preferred synchronous social media. Rather, asynchronous social media were mainly used for deep thinking and summarizing. Last, suggestions were made to improve educational environments for the learners in the digital and social media age.

• The Journal of the Korea Contents Association
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• v.7 no.1
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• pp.73-82
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• 2007

In recent years, embedded systems have been expanding their application domains from traditional applications (such as defense, robots, and artificial satellites) to portable devices which execute more complicated applications such as cellular phones, digital camcoders, PMPs, and MP3 players. So as to manage restricted hardware resources efficiently and to guarantee both temporal and logical correctness, every embedded system use a real-time operating system (RTOS). Only when the RTOS makes kernel services deterministic in time by specifying how long each service call will take to execute, application programers can write predictable applications. Moreover, so as for an RTOS to be deterministic, its scheduling and context switch overhead should also be predictable. In this paper, we present the complete generalized algorithm to determine the highest priority in the ready list with 22r levels of priorities in a constant time without additional memory overhead.

• Journal of Korean Society of Transportation
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• v.25 no.2 s.95
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• pp.145-155
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• 2007

The objectives of this study aye to develop an on-line departure time-based travel time estimation method and to determine an optimal link length for the estimation. This study developed a link-based rolling horizon logic as the travel time estimation method. In order to determine an optimal link length, the information error of the travel time provision from the user's perspective was defined and employed as a selection criterion. It was found that, when the travel time aggregation size was set as five minutes, a link length of four kilometers gave the most accurate result.

• Journal of the Korean GEO-environmental Society
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• v.15 no.10
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• pp.43-51
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• 2014

Recently, National Emergency Management Agency constructs integrated information system for preventing national earthquake based on underground information. In the past, there are numerous difficulties in construction and management of underground information, because underground information is constructed by each management agency. But a link and application of underground information are available because of government 3.0. This study shows the integrated information system for preventing national earthquake based on real-time link of underground information. The integrated information system for preventing national earthquake developed in this study consists of boring information input modules, underground information search/analysis modules based on V-world tile map, user authority management modules, user management modules and real-time liaison interface modules. Also, this study proposes enhancement plan to construct integrated information system for preventing national earthquake stably and strongly. Stability test conduct on stability of data storage, system stability and consistency of processing speed test results show stability of the integrated information system for preventing national earthquake is high.

• Journal of the Korean Society for Railway
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• v.13 no.1
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• pp.23-30
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• 2010

In the construction phase, the existing schedule management system by 4D CAD has been difficult to check for a status and progress of construction product in real-time because it simulates only VR (virtual reality) object based on a planned schedule. This study suggests a construction schedule management system by telepresence technique that can visualize progress status in real-time by using 4D CAD system based on remote monitoring. The telepresence methodology and system were developed in the study and they were verified for a railway construction project. The developed system can examine the status and progress of construction because it can compare 4D simulation based on planned schedule with real-time site images through web-camera.

• The Korean Journal of Applied Statistics
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• v.16 no.2
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• pp.203-215
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• 2003

In order to provide the drivers with more reliable transportation information in NHTMS(National Highway Transportation Management System), it is important to estimate the expected passage time by using the traffic volume and speed. In this study, we analyze the characteristics of the traffic volume in the national highway and we investigate two real-time adjustment methods: the average adjustment method and the auto-regressive adjustment method. In addition, we compare them using the real data collected at the National Highway Route 3 in 2000.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.638-638
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• 2012

인구증가와 한정된 물 공급에 따른 하천과 생태계 관리는 의사결정자들의 복잡한 문제이다. 하천 시스템에 대한 우리의 이해 능력은 기술과 과학적 이해 모두 향상되어가고 있다. 자료 모형, 예측 모형 등은 수십 년간 하천 관리 시스템과 유출 등을 예측하는데 사용되었다. 하천 생태계 프로세스에 대한 지식과 더 정확하게 증가된 자료의 수집 능력으로 인해 풍부한 자료를 갖게 되었다. 특히 4대강 사업에 따른 하천환경 변화로 하천관련 정보가 과거에 비해 비약적으로 증가하고 있어 이를 효율적으로 관리하는 이용체계 수립이 필요하다. 현재 하천 시스템은 국가, 지자체, 연구기관 등 공급자 중심으로 운영되고 있다. 따라서 국가차원에서 방대한 자료와 IT/NT/BT의 융복합적 첨단기술을 접목한 하천 시스템 구축에 대한 대책이 필요할 것이다. 이를 국외 하천 정보화 사례들을 통해 실시간으로 관측되고 있는 자료와 하천 시스템을 살펴보고 우리나라가 가야할 방향에 대해 알아보고자 한다. 선진 정보화 시스템은 정부, R&D, 지자체가 각 시스템을 개발하고 함께 자료를 공유하는 통합시스템을 지향하고 있다. 미국과학재단의 펀드로 정부, 대학, 지자체가 함께 수문 자료 시스템과 수질환경 자료 시스템을 개발하고 이를 통합수문환경정보시스템으로 발전시키고 있다. 우리나라 정보화 시스템의 경우 정부 시스템은 공개 되어 있지만. R&D 시스템은 폐쇄적이다. 또한 각 주정부부처의 개별 시스템은 구축이 되어있지만 수문, 환경이 통합된 정보시스템은 미비한 실정이다. 앞으로 시험유역의 체계적 정보취합과 분석 자료의 시스템 구축 및 공유가 필요할 것으로 사료된다.