• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.2
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• pp.171-178
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• 2020

Many countries are establishing and operating blended learning that combines the advantages of online and offline education. However, online education lecture-based Mooc courses have a very low level, with a graduation rate of less than 5-10%. Therefore, in order to increase the graduation rate of students taking online Mooc distance education lectures that anyone can easily take lectures anytime, anywhere on the web-based basis, it is necessary to introduce automatic analysis of students' understanding level of lectures and an automatic academic warning system. Moreover, in order to enter an advanced education country, it is necessary to develop an automatic judgment SW for wrong answer rate, automatic summary SW for lectures, and automatic analysis SW education for lecture-based weak subjects based on mixed learning levels. In order to improve this problem, in this paper, we proposed and simulated an automatic summarization system for lecture contents, an automatic warning system for incorrect answers, and an automatic judgment algorithm for weak subjects.

• The Journal of the Korea Contents Association
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• v.17 no.12
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• pp.138-147
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• 2017

In this paper, we introduce smart multi-sensor and environment monitoring system for managing growth and development of the agricultural produces. This system is able to help to collect the sensor information about the growing environment and to monitor in wired and wireless environments. Existing systems installed each kinds of sensor to gather information. In this case, installation cost was incurred about each sensor and the position of sensor set up manually. Therefore, this paper designed and implemented smart multi-sensor that simplify sensors in order to minimize the cost for installing each sensor. In addition, this system is able to monitor position and data information of smart multi-sensor using RFID communication

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.1380-1382
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• 2007

인터넷의 발달로 온라인 원격강의나 E-Learning 형태의 교육이 많이 확산되었다. 온라인 교육의 확산으로 웹을 기반으로 하는 클라이언트 소프트웨어들이 많이 개발되어 사용되고 있다. 특히 교과목의 특성상 실습위주로 진행되는 프로그래밍 관련 교과목에서는 자동화 된 과제평가 시스템이 필요하다. 프로그래밍 과제평가 시스템에서는 과제제출, 소스코드 업로드, 컴파일 및 실행, 채점, 표절검사 등의 과제평가를 위한 기본적인 작업들을 수행된다. 위와 같은 작업들이 모두 평가시스템 서버에서 진행되기 때문에 서버에 많은 부하가 걸린다. 또한 공정한 평가를 위해 보안이 최우선적으로 고려되어야 한다. 본 논문에서는 스마트 클라이언트 기술을 이용한 과제평가 시스템을 설계하고 구현하였다. 본 시스템에서는 과제평가 시스템의 서비스를 분산시켜 시스템의 부하를 줄이고, 보안을 향상시킴으로써 학생들에게 공정한 평가를 가능하게 하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.01a
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• pp.53-54
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• 2017

비콘 서비스란 가까운 범위 안에 있는 사용자 위치를 찾아 메시지 전송, 모바일 결제 등을 가능하게 하는 스마트폰 근거리통신 서비스로, O2O 실현에 핵심적인 역할을 담당한다. 비콘을 활용하면 사물과 상황인식, 콘텐츠 푸시, 실내위치 측위, 자동체크인, 지오펜스 등 다양한 서비스 제공이 가능하다. 본 연구에서는 비콘을 활용하여 출석을 체크하는 자동 출석 시스템을 구현하였다. 자동 출석 시스템에서는 사용자가 강의실에 들어오는 것을 인식하여 출석 검사를 하며, 이 자료를 인터넷을 통하여 데이터베이스에 저장한다. 다양한 강의를 구별할 수 있으며, 들어온 시간, 나간 시간 등의 검사가 가능하며, 이를 좀 더 보완한다면 상황인식 시스템으로써 다양한 서비스와 연계시킬 수 있다.

• KIISE Transactions on Computing Practices
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• v.21 no.4
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• pp.283-289
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• 2015

We propose a low cost attendance checking system using NFC (Near Field Communication) and show a case study of an actual operation of the system in a higher education institute. The system offers a direct attendance check service when a student touches NFC tag on a classroom desk with his/her own smartphone. Our service was first developed and operated in 2012, and then additional functions like massive real time processing were reinforced. In the fall semester, 58 courses use the service and 96% of the class attendance was checked with mobile devices. The only hardware requirement of the system was NFC tag on the classroom desk, which reduced hardware cost dramatically. However, it also minimized attendance checking time into 1 minute regardless of enrolled student number.

• Journal of the Korea Society of Computer and Information
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• v.18 no.11
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• pp.137-143
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• 2013

A teacher needs documented information includes basic information about students and lectures to teach students. Currently, both non-electronic and electronic teachers diary are used in most of the field of education. designed and implemented. The electronic teachers diarys only driven on desktop PC. Therefore, managing school affairs with this un-portable system is very inefficient. In this paper, we designed and Implementation Smart Teachers Diary System to check students' information in any time and place with own smart device.

• Journal of the Korea Society of Computer and Information
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• v.28 no.11
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• pp.103-111
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• 2023

Recently, many universities have used various electronic attendance systems such as NFC, QR code, Sound-QR, Bluetooth BLE authentication, and face recognition to process attendance. However, existing methods have various problems such as attendance errors due to deformation of authentication signals, mis-recognition attendance from outside the classroom, and difficulty to process seat absence during class. Therefore, this study proposes a high-frequency signal-based electronic attendance system to solve these problems and manage more accurate electronic attendance. As the high-frequency signal replaces the BLE signal, and the transmission range of the signal is limited to the classroom, and the signal value can be immediately changed if a change of the signal is needed. To verify the performance of the proposed system, we conducted a comparative experiment with the Bluetooth based electronic attendance system, and as a result, the proposed method showed high accuracy. Thus, the proposed method will be a useful service that can be immediately used in smart device-based electronic attendance system.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.6
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• pp.1369-1380
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• 2011

Most existing mobile distance learning systems are asynchronous ones that allow students to download lecture video and presentation material. However, there are a few synchronous real-time mobile distance learning systems that support slide, annotation, feedback from student, and lecture video and audio at the same time. These live mobile distance learning systems have an advantage of supporting real-time interaction between students and a lecturer thereby making students understand the lecture better. But, they also have a disadvantage in the sense that they don't allow students to experience the past lecture. This problem can be solved by recording and replaying lecture session. So far, there are few mobile distance learning systems that support session recording and replay. This paper presents a synchronous mobile distance learning system that supports video and audio, slide with annotation, and real-time feedback from students, as well as session recording and replay, which is not supported by the existing mobile distance learning systems. The evaluation of the system among students shows that 61.3% of them were satisfied while 3.2% weren't.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.5
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• pp.195-201
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• 2013

The government has invested much budget for 5years to do the Smart-education and operate digital textbook services since 2011. The private enterprises also decided to focus on constructing Smart learning system by investing much budget. If these systems are constructed nationwide and therefore can access to cyber university by using smart devices, we can reduce the information gap and study online lectures to get a grade whenever, whoever and wherever we want to. However, these convenient systems can cause serious problems like falsifying grades by hacking if security systems are weak. In this paper, we formulated cyber university which is secured in terms of security. For this, we simulated the smart-learning system which strengthened the security, considering code algorithm and encryption technique.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.7
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• pp.1639-1644
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• 2013

Recently, interest is rapidly increasing in short-range wireless communication such as NFC (Near Field Communication). In order to minimize the attendance time, we propose the attendance management system using the NFC tags attached in all of the desks in a classroom and NFC readers embedded in most of the smart-phones released in lately. The system consists of PC version web-application for professors and the android version app-application for students. And it provides the professors with more lecture time by saving the attendance check time. The contribution of this paper include that it proposes and develops the prototype of the attendance management system using NFC and proves that the system is applicable to the various kinds of educational organizations.