• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.1
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• pp.211-224
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• 2015

Financial companies have invested a lot in their disaster recovery system and exercised training more than once a year to comply related laws and regulations. But massive PCs(Personal Computers) became disrupted simultaneously and it took a lot of time to recover massive PCs concurrently when March 20 cyber attack occurred. So, it was impossible to meet the tartgeted business continuity level. It was because the importance of PC recovery was neglected compared to other disaster recovery areas. This study suggests the measure to recover massive branch terminal PCs of financial companies simultaneously in cost-effective way utilizing the existing technology and tests recovery time. It means that in the event of disaster financial companies could recover branch terminal PCs in 3 hours which is recommended recovery time by regulatory body. Other financial companies operating similar type and volume of branches would refer to the recovery structure and method proposed by this study.

• International Journal of Contents
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• v.8 no.4
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• pp.36-41
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• 2012

We present a novel watercolor painting drawing system which can work even on low powered computing machine such as tablet PC. Most digital watercolor systems are generated to perform on desktop, not low powered mobile computing system such as iPad. Our system can be utilized for art education besides professional painters. Our system is not a naïve imitation of real watercolor painting, but handles with properties of watercolor such as diffusion, boundary salience, and mixing of water and pigment.

• Proceedings of the Korea Database Society Conference
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• 1995.12a
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• pp.80-89
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• 1995

지능형 멀티미디어 워크스테이션 특징 ■ Agent-Based Computing Environment & User Interface ■ Portability with Workstation Computing Power ■ Multimedia and Intelligence ■ Easy to use ■ Easy to add functions ■ Evolution based on History of Desktop Environment ● dummy text terminal → PC → Personal Workstation → X-terminal 사용자의 특성 ■ 쉽고 편리하게 사용하기를 원하는 사용자 ■ 이동하면서 작업을 하여야 하는 사용자 ■ 데이타의 저장 및 처리보다는 주로 멀티미디어 데이터를 검색하는 사용자 ■ 멀티미디어 데이타가 주로 서버에 있는 경우와 이러한 데이터를 이용하는 사용자(중략)

• Proceedings of the Korea Multimedia Society Conference
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• 2001.11a
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• pp.253-259
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• 2001

인터넷을 통해 멀티미디어 데이터의 접근이 보편화됨에 따라 다양한 형태의 데이터와 사용자 인터렉션이 요구되었고, 또한 유선 및 무선등과 같은 다양한 통신 선로에서 Desktop-PC, PDA, Hand-Held PC등과 같은 다양한 단말기를 통해 멀티미디어 데이터 서비스를 받으려는 사용자의 요구가 증가되고 있다. 따라서 이런 요구를 효율적으로 지원할 수 있는 멀티미디어 시스템에 대한 개발이 요구되었고, 이를 위해 MPEG4 표준이 등장하게 되었다. MPEG-4(ISO/IEC 국제표준 14496)는 오디오, 비디오, 합성 오디오, 그리고 그래픽스 요소(material)를 포함하는 멀티미디어 데이터로 구성된 복잡한 씬(scene)을 구성하고, 이를 통신라인을 통해 사용자와 상호작용이 가능한 멀티미디어 시스템을 정의하는 표준규약을 말한다. 본 논문에서는 Java와 Java3D기반의 MPEG-4 표준 규약에 충실한 MPEG-4 시스템 구현에 대하여 기술한다.

• Journal of Computing Science and Engineering
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• v.4 no.1
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• pp.80-95
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• 2010

In order to truly integrate e-Learning system into regular curriculum at a university, mobile access to Learning Management Systems has to be enabled. Mobile devices have the potential to be integrated into the classroom, because they contain unique characteristics such as portability, social interactivity, context sensitivity, connectivity and individuality. Adoption of Learning Management Systems by students is still on the low rate, mostly because of poor usability of existing e-Learning systems. Our initial research has confirmed this hypothesis. Usability issue is rising to the higher level on the mobile platform, because of the mobile devices' limited screen size, input interfaces and bandwidth, and also because of the context of use. Our second hypothesis was that it is wrong to consider a mobile device as a surrogate for desktop or laptop personal computer (PC). By just adopting the existing Learning Management System on mobile devices with adaptive technologies such as Google proxy, we do not acquire the satisfactory results. Usability can prove to be even lower compared to desktop application. One possible solution to the problem could be development of rich client applications for today's mobile devices that would raise the usability to a higher level. We developed a PocketPC prototype application by using user-centered design principles, which we presented as a third alternative in usability research conducted among university students. Results gathered in such a way have confirmed that development of e-Learning system, in order to be widely accepted by students, needs to have the user(student) in the center of development process.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.3
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• pp.522-532
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• 2012

Smartphones and smartpads have a lot of advantages such as high convenience and portability. Also, they can effectively manage enormous amounts of information based on their high performance and plentiful applications. As such devices have been frequently used, many users manage various types of information using the devices. Recently, during conferences or seminars, smart device users often try to utilize stored resources on their devices and present them visually. Unfortunately, since smart devices have small displays, there is an essential difficulty in visual sharing of information. In this paper, we propose a method which integrates screens of several android smart devices and supports sharing of the integrated screen through a large display, presenting a screen sharing system for android smart devices. The developed system integrates display screens of several smart devices into a screen and shows the integrated screen through a large display connected to a desktop computer. In addition, to support the effective sharing of screens, the system provides functions for adjusting the number and the size of screens on a large display. The functions are controlled on a smart device and/or a desktop computer.

• Journal of KIISE:Computing Practices and Letters
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• v.13 no.4
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• pp.226-230
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• 2007

In the conventional desktop PC environment, keyboard and mouse are used to process the user input and monitor displays the visual information as an output device. In order to manipulate the digital information, we move the virtual cursor to select the desired graphical icon on the monitor The cursor represents the relative motion of the physical mouse on the desk. This desktop metaphor does not provide intuitive interface through human sensation. In this paper, we introduce a novel tangible interface which allows the user to interact with computers using a physical tool called "Smartpuck". SmartPuck system bridges the gap between analog perception and response in human being and digital information on the computer. The system consists of table display based on a PDP, SmartPuck equipped with rotational part and button for the user's intuitive and tactile input, and a sensing system to track the position of SmartPuck. Finally, we will show examples working with the system.

• The Journal of Korean Institute of Next Generation Computing
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• v.13 no.3
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• pp.60-71
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• 2017

Smart devices such as smart phones, smart TVs, and smart pads have become essential devices in recent years. As the popularity and demand grows, the performance of smart devices is also getting better and users are dealing with a lot of things such as education and business using smart devices instead of desktop. However, smart devices that still have poor performance compared to desktop, even with improved performance, have difficulty running high performance applications due to limited resources. In this paper, we propose a load balancing algorithm applying the characteristics of smart devices to overcome the resource limitations of devices. in order to verify the algorithm, we implemented the algorithm after adding the distributed processing system service in Android platform. After constructing the cluster on the smart device, various experiments were conducted. Through the analysis of the test results, it is confirmed that the proposed algorithm efficiently improves the overall distributed processing performance by effectively aggregating different amounts of computing resources in heterogeneous smart devices.

• Proceedings of the KIEE Conference
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• 2003.11c
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• pp.592-595
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• 2003

In this paper, we have designed a Home Networking System using an embedded linux board. The system based on the World-Wide-Web is composed of three parts - a Server, a Client and a Simulator. The Home Networking Server is built in an embedded board using an embedded linux kernel. A web-server and Home Networking Server Seryice Demon programming with a Jaya-Language is included in the board. Clients can connect to the server board using a web-browser in the desktop computer, PDA or any other machines which include a web-browser. For this purpose, we made the client program using a Java-Applet. So, the clients who connect to the server for the control of the applications, download the class-file and execute the client-program in the web-browser. So, the clients don't need any other programs to control the applications from a remote place. The size of server board is very small (86.3$\times$74mm), which makes it very useful not only for the Home-Networking-System but also in many other fields, e.g., embedded robot control system, etc. Using an embedded board instead of a desktop computer is good for a simple network environment and it occupies only a small space to make the system.

• Journal of the Korean Institute of Navigation
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• v.20 no.3
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• pp.13-30
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• 1996

It is general that large ships entering or leaving a port located in the East coast of Korean peninsular are often exposed athwart to swell while maneuvering in the vicinity of breakwater at harbor enterance or to prevailing wind inside the port in winter. Particulary, Many VLCCs laden with ore coal are calling at Pohang Port, on account of which it is likely that one of those VLCCs block the port if they were to run aground in fairway due to adverse circumstance of swell, prevailing winds or improper shiphandling. This accident may result in delay of delivery of raw material for Pohang Steel Mill which will bring about shortcomings of steel products for nationwide relevant industries causing national economic shock. Therefore, This study basically aims at establishment of certain criteria for safe unberthing of VLCC in this port to prevent such unexpected disaster because any VLLC is highly affected by external forces when in ballast condition. Computer simulations are unavoidable to fulfull this study successfuly and many simulations have been carried out repeatedly to find a model of safe unberthing under various unfavourable wind conditions. The "PC-based ship maneuvering simulator for training purpose" was used to perform numerous simulations at the least economic burden and to verify its availability that it can be used not only for training but also some other purposes. purposes.