• Proceedings of the Korea Information Processing Society Conference
• /
• 2016.10a
• /
• pp.164-165
• /
• 2016

최근 리소스의 규모를 자유롭게 변경할 수 있는 클라우드 컴퓨팅이 널리 쓰이고 있다. 본 논문에서는 클라우드 컴퓨팅을 이용하여 스마트폰이나 테블릿상에서 그림, 문자입력을 공유 할 수 있는 화이트보드 시스템의 설계 및 구현을 제시한다. 본 시스템의 사용자가 안드로이드 스마트폰 상의 화이트보드에서 사용자가 그림이나 문자를 그리게 되면 그 데이터는 AWS(Amazon Web Service) 클라우드 컴퓨팅서버를 통해 모든 클라이언트에게 브로드캐스트하며 그 후 클라이언트들은 받은 데이터를 자신의 스마트폰 디스플레이에 출력한다. 본 시스템은 웹서비스만으로 서버를 늘릴 수 있기 때문에 손쉽게 서버증축이 가능하다.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
• /
• v.9 no.1
• /
• pp.109-113
• /
• 2016

The necessity of M2M(Machine to Machine) and Multimedia CSCW is described, and error control for multimedia CSCW(Computer Supported Cooperated Works) based on M2M is suggested. The relationship of information collection and utility is relationship of man to man, but is developed object to object by information communication and control system. This paper describes an error control and a white board in multimedia CSCW for M2M environment.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2012.04a
• /
• pp.1318-1321
• /
• 2012

교실 현대화 또는 교과교실 지원 사업에 의하여 현재 대부분의 학교는 2D 형 LCD 타입의 전자칠판을 설치하여 운용하고 있으며, 현재는 3D 전자칠판의 도입이 활성화되고 있는 시기이다. 본 연구는 상호응답형 3D 전자칠판에 대한 연구이다. 상호응답형 3D 전자칠판의 구성은 영상을 제어를 위한 AD보드, 3D 변환을 위한 3D변환 포맷터, 해상도 제어를 위한 FRC보드로 결합되며, 상호응답형 전자칠판을 구현하기위해 {x,y,z} 좌표 축출을 위한 전자팬 및 양안 카메라 기술을 적용했다. 또한 실시간 3D 판서 운용을 위한 3D 판서소프트웨어에 대한 구현 방법과 운용 구성에 대하여 연구했다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2013.05a
• /
• pp.728-730
• /
• 2013

스마트 모바일 기기의 발전으로 고성능, 고효율, 사용성이 급격하게 증가하고 있다, 또한 개인의 용도를 확장한 교육 분야 및 기타 산업분야에 전반적으로 사용되고 있다. 하지만 산업 및 교육 측면에서는 스마트 기기의 화면이 너무 작어서 활용성 및 교육적인 면에서 제약으로 대두되고 있다. 이에 본 연구에서는 스마트 모바일 기기의 화면을 실시간 HD 무선통신을 통한 대형 전자칠판으로 전달하고 또한 대형 전자칠판의 터치 데이터를 스마트 기기에 전달하여 대형 전자칠판에서 스마트폰 기능을 사용가능하게 하는 연구이다.

• International Journal of Computer Science & Network Security
• /
• v.22 no.9
• /
• pp.348-352
• /
• 2022

This study aims to identify the obstacles to using interactive whiteboards for teachers of students with learning disabilities (LDs) in the Makkah region and to delineate any differences in the levels of these obstacles that can be attributed to the study variables: teachers' gender, academic qualifications, age, and years of experience. The researchers applied the descriptive survey approach to a sample of 123 teachers of LD students. To analyze the results, frequencies, averages, standard deviations, and relative weights were calculated. The results of the study indicated that the levels of the obstacles to using interactive whiteboards for teachers of LD students were moderate. No statistically significant differences in the levels of these obstacles were related to the variables of gender or age, whereas significant differences were found based on academic qualifications and years of experience.

• Proceedings of the KSRS Conference
• /
• 2003.11a
• /
• pp.663-665
• /
• 2003

A field spectroradiometer SE-590 was used to measure the spectral reflectance of water body. The reflectance was calculated as the ratio of surface water radiance to the standard whiteboard radiance nearly measured at the same time. Water samples were taken simultaneously for determining their chlorophyll-a, suspended solid (SS) and transparency. The relationships between those water quality parameters and spectral reflectance were analy zed using stepwise multiple regression to derive optimal prediction models . The multiple regression was also applied to the SE-590 simulated SPOT bands. The SPOT image of the same day was also analyzed using the same method to compare the statistical results. It showed that the multiple regression models using the SE-590 reflectance data got the best water quality prediction results. The evaluated RMS error of chlorophyll-a, SS and transparency of water quality parameters were 0.57 ug/l, 0.2 mg/l and 0.17 m, respectively, and the RMS errors were 0.36 ug/l, 0.49 mg/l and 0.42 m for SPOT data, respectively. The SE-590 simulated SPOT three bands data obtained the worst results and the RMS errors were 1.77 ug/l, 0.49 mg/l and 0.37 m, respectively.

• Journal of The Korean Association of Information Education
• /
• v.2 no.2
• /
• pp.209-214
• /
• 1998

The advent of powerful hardware and advances in high speed networks enabled synchronous learning, with teachers and students being geographically distributed but connected via computer networks. Today's synchronous learning systems are mainly based on video conferencing technology which provides audio, video, and joint editing of documents only, but does not take into account the specific requirements of teaching, for instance, controlling the course of instruction, raising hands, or reference pointing. A shared whiteboard is often the core part of these systems. Therefore, in this paper, we look into implementation issues in whiteboards of distance learning systems. Particularly, system architectures and concurrency control mechanisms are considered.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2003.10a
• /
• pp.916-919
• /
• 2003

Reliable multicast data transmission in a 1:N environment needs more sophisticated error control mechanism than that of in 1:1 environment due to ACK implosion and duplicated retransmission. Although there have been many related research on error control in reliable multicast, real implemented protocols are rare. As one of the reliable multicast transport protocols, ECTP is selected as an international standard reliable multicast protocol by ITU-T and ISO and implemented on RedHat 7.2 machine by us. In this paper, we evaluate the performance of the error control mechanism in the respect of throughput and generated control packet numbers with a real implementation code. From the results, it is concluded that the suitable values of error control parameters can be obtained from the local group size and network environments.

• Korean Journal of Computational Design and Engineering
• /
• v.7 no.1
• /
• pp.57-65
• /
• 2002

The purpose of this research is to develop a collaborative architectural design system. Design collaboration requires an extensive use of communication methods as well as the participation of various experts from different domains. Such facts address several issues when the Internet and digital media are able to create a completely new work environment. The building design process was studied, and possible modes of design collaboration were defined. A prototype system is being developed in accordance with the defined collaboration model. The system integrates a set of communication tools and web-based design media. Such media include a synchronous multi-user web CAD tool, a schematic 3D design tool, and a electronic whiteboard. A project database was designed in order to coordinate the project-wide communication which elaborates technologies such as web-based data access. In order to find out the effectiveness of the system, a usability test was performed both in quantitative and qualitative manner. The research will contribute to the development of world-wide design and construction collaboration through the Internet, which is becoming a mainstream building process model.

• Journal of The Korean Association of Information Education
• /
• v.15 no.3
• /
• pp.425-437
• /
• 2011

The major functions of the digital textbooks that have been developed recently were focused on electronic whiteboard, learning tools, multimedia. But supporting contents retrieval was not included yet. This study is aimed to develop an elementary digital textbook that supports retrieval function. We surveyed elementary teachers about the requirements for search function and a digital textbook was designed and implemented based on the result of the survey. The distinctive feature of the developed digital textbook, which is written in XML, is that it is enabled to search the units of meaningful phrases. The survey which was carried out after using the new digital textbook showed that more than 90% of the teachers think that it is quite useful in class and they would like to use this textbook in their class. If a retrieval function can be added to the digital textbook which is going to be supplied to elementary schools, it will be a lot helpful for teaching and learning procedure.