• Proceedings of the IEEK Conference
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• 2001.06b
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• pp.317-320
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• 2001

In this paper, Variable width system bus provides a variable data bus width from 8bit to 128bit. This paper has designed variable width system bus controller for microcontroller to connect to peripherals.

• Education of Primary School Mathematics
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• v.3 no.1
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• pp.55-62
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• 1999

Through our elementary school mathematics, measurement is a critical topic since measurement helps connect ideas within areas of mathematics and between mathematics and other disciplines. In grade 4, students should understand angle, time, perimeter and area of figures by active involving. The paper gives ten ideas about teaching these concepts.

• Proceedings of the IEEK Conference
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• 2003.11c
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• pp.386-390
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• 2003

There is still lack of a convenient system that connect referring physicians to the information system of referral hospitals. In this paper, We proposed to implemented Referral system based on HL7 for exchange and sharing of clinical information. The Present implementation is based on HL7 v.2.4 using XML.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.1B
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• pp.1-7
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• 2004

Increase of internet users and new type of applied traffic such as game, news, distributed computing, online image conference, and real time audio and video have leaded to demand for more bandwidth for each application. This algorithm represents a complex optical exchanger having typical wavelength switching function and time-slotted transmission function. Performance assessment of the proposed OXC (Optical Cross connect) sttucture defines LFS (Limit Frame Size) and VFS (Variable Frame Size) for classification by packet type and calculates the channel effect and loss probability depending the demanded bandwidth by access node increase. Optical exchanger in this type of structure can guarantee future network expansion as well as decrease of frame collision resulted from node increase.

• The KIPS Transactions:PartB
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• v.19B no.4
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• pp.221-224
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• 2012

The most famous algorithm of splitting and connecting Snake for extracting the boundary of multiple objects is the nearest method using the distance between snake points. It often can't split and connect Snake due to object topology. In this paper, its problem was discussed experimentally. The new algorithm using vector between Snake segment is proposed in order to split and connect Snake with complicated topology of objects. It is shown by experiment of two test images with 3 and 5 objects that the proposed one works better than the nearest one.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.2
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• pp.73-80
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• 2009

Although it is relatively difficult to eavesdrop the commonly used PSTN in that it is connected with direct circuit, it is difficult to ensure the secret of call on Internet because many users can connect to the Internet at the same time. However, it is needed to ensure secret of voice call in a special situation. Due to the fact that many users can connect to the internet at the same time, VoIP can always be in a defenseless state by hackers. Therefore, in this paper, we have developed the increased voice security internet telephone terminal and measured conversation quality by adopting VPN PPTP based on SIP and using tunnel method in transmitting voice data to prevent eavesdrop of internet telephone.

• Journal of Korea Multimedia Society
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• v.15 no.1
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• pp.101-107
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• 2012

Real time information on disaster situation is very important in disaster prevention effort. Generally, disaster related organizations use mobile devices to collect various disaster informations of disaster site. However, current disaster collection systems do not provide effective functionality to connect with another disaster information system. Therefore, disaster-related organizations have to make smartphone application for collection and administration of disaster information and then connect it with another information system. If this system is commercialized, vulnerability of previous system can be complemented. Thus, this paper focused on designing a prototype system for information collection and management in disaster site using smartphone applicatiom.

• Journal of Institute of Control, Robotics and Systems
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• v.7 no.1
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• pp.1178-1186
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• 2001

This paper presents design and analysis of a 6 degree-of-freedom new haptic device using a par-allel mechanism for interfacing with virtual reality. The mechanism is composed of three pantograph mecha-misms that, driven by ground-fixed servomotors. stand perpendicularly to the base plate. Three spherical joints connect the top of the pantograph with connecting bars, and three revolute joint connect connecting bars with a mobile joystick handle. Forward and inverse kinematic analyses have been performed and the Jacobian matrix is derived by using the screw theroy. Performance indices such as GPI(Global Payload Index), GCI(Global Conditioning index), Traslation and Orientation workspaces, and Sensitivity are evaluated to find optimal pa-rameters in the design stage. The proposed haptic mechanism has better load capability than those of the ex-isting haptic mechanisms due to the fact that motors are fixed at the base. It has also wider orientation work-space mainly due to RRR type spherical joints.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.35 no.4
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• pp.281-290
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• 2017

Transportation plays a vital role in sustainable development, and moreover, bulk transportation provides cost effective movement of goods and human beings with less environmental issues. Nepal is a developing country with increasing urbanization and transportation demands. The growing interest of China to connect with Southeast Asia through Nepal has led to ambitious project proposal of Rasuwa Gadhi to Birgunj Railways, which is the shortest route from China to India. Lack of updated geospatial data has lead the concerned authorities in Nepal to be dependent on analysis and proposals from donor nations. Taking such considerations, based on GIS and free data, this study explores optimal routes to connect cites using slope and land cover. Based on reclassified slope, two shortest optimal routes were found. One passing through Baireni in Dhading and another through Kathmandu towards Birgunj with length of around 172 Kilometers. The study shows that available open source data can be used of preliminary feasibility studies and yet shows limitations for detailed economy based planning. Development and use of high resolution updated geospatial data is of high necessity for Nepal to become self-sustained in planning of development works.

• Journal of Korea Multimedia Society
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• v.12 no.7
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• pp.979-988
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• 2009

Illegal reproductions and subsequent copyright infringement have curtailed development of digital content industry. Many DRM systems have been developed and utilized for this purpose. However, current DRM system allow only authorized user to access the contents, and as such, redistribution to other user without getting license again entails cumbersome process. Currently, super-distribution system which can be used for redistribution of downloaded contents in more streamlined fashion is being widely conducted. But for streaming type content, it is still very difficult to redistribute with super-distribution system because the client must directly connect to streaming server to access the content. Accordingly, a new DRM streaming service structure is required to allow streamed contents to be redistributed as easily as the downloaded contents. In this paper, we proposed the relay file structure that can connect the streaming server and the user for super-distribution of the streaming contents.