• Journal of the Korean Society of Environmental Restoration Technology
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• v.5 no.6
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• pp.14-23
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• 2002

Daejeon is a large city in Korea and very high-speedly developing city. Recently urban area is expanding and large forest patch is fragmenting into small habitats because of urban sprawl. The fragmentation of large forest patch decreases the size of habitats and increases the loss of biodiversity in urban area. This study is to analysis the connectivity of green space of Daejeon metropolitan city, and suggest the optimum location of greening site and corridor in order to increase the connectivity of green space of Daejeon metropolitan city. The findings of this study are as follows; (1) The result of this study showed that ${\alpha}$ and ${\gamma}$ index are -0.24 and 0.20. A ${\alpha}$ index is very low and a ${\gamma}$ index is relatively low. (2) The dispersion was very high, for urban forest patches were isolated through fragmentation. Therefore, it needed ecological corridors in order to connect the patches. (3) A urban streams were very important in connectivity of urban green space. Urban riparian corridor must be preserved and restored. (4) A urban green space policy and planning must be prepared to increase the connectivity and assessment of alternatives must be accomplished from perspective of connectivity. The results of this study show the practical implications in perspective of green space planning and policy in Daejeon metropolitan city. The suggestions by findings of this study are to connect green space between large forest patch in urban fringe and island green space in inner city. Also, It is required that urban stream is restored to natural feature for use of corridor by wildlife.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.11B
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• pp.1422-1432
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• 2011

Recently, wireless network has been playing an important role in communication system and the applications have become wider with its big technological leap. In defence sector, there are some attempts to use wireless networks to go beyond the wire system. Especially, most internal space of the warships have the wired communication system, which are complicated and inefficient. In this paper, we measure and make a channel model about the internal parts of the warship which contain compartments and corridors including many differences from general indoor environment for establishing wireless networks in warship's internal space. In the unique environment made of metal, we measure 2.4GHz signals using continuous wave(CW) and analysis the environment to present indoor path-loss model for comparing with results from the ray-tracing tool. Moreover, we draw the conclusion that the environment of warships has a wide difference from conventional environments and put the results to practical use in warship's internal space.

• The Journal of Korean Institute for Practical Engineering Education
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• v.2 no.1
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• pp.71-76
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• 2010

There are two ways of wireless network practice. One of the ways is to use wireless network equipments directly. And the other way is to use wireless network simulators. But they have some problems such that space limitation, required equipments and setting up the simulators for each wireless network practices. So, in this paper, we showed the model of application for students and professor is modeled from real practice environment. We also suggested algorithms for implementation of an application about wireless network practice based on web.

• Proceedings of the KIEE Conference
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• 1997.11a
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• pp.158-160
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• 1997

WHEN IT IS REQUIRED TO CONNECT OVERHEAD TRANSMISSION LINE WITH UNDERGROUND CABLE, PREVALENT METHOD WAS TO USE CABLE HEAD TYPICALLY MADE OF LATTICE STEEL STRUCTURE. BUT IN VIEW OF THE INCREASING DEMAND THAT STEEL STRUCTURE INSTALLED IN URBAN AREA AND/OR RESIDENTIAL AREA NEED TO MATCH WITH ENVIRONMENTAL SURROUNDINGS, THE UNSHAPELY LARGE-SIZED LATTICE STEEL STRUCTURE CAN NOT BE A PROPER ONE BECAUSE THAT IT IS NOT WELCOMED BY THE RESIDENTS AND ACCORDINGLY ITS INSTALLATION TENDS TO CONFRONT WITH CIVIL PETITION. AS AN ALTERNATIVE METHOD TO SETTLE AFOREMENTIONED UNFAVOURABLE SITUATION WE MAY BE UNDER, WE AR INTENDING TO DEVELOP THE CABLE HEAD MADE OF TAPERED TUBULAR STEEL POLE AND TO PUT IT TO PRACTICAL USE. THE ADVANTAGE WE CAN TAKE OF THE TAPERED TUBULAR STEEL POLE IS THAT IT CAN BE INSTALLED IN A VERY LIMITED SPACE MAXIMIZING THE UTILITY VALUE OF THE LAND AND THAT ITS SMART SHAPE WITH COLOUR COATING IN CONSIDERATION OF AESTHETIC AESTHETIC CAN BE IN GOOD HARMONY WITH THE SURROUNDINGS.

• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.313-313
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• 2000

Recently the number of lectures of offered as part of distance education courses is increasing due to the necessity of continuing education in this era of rapidly changing technologies. To promote this, Web-based distance education systems have been developed and put into practical use. To step further, we propose a virtual space, distance education platform called interactive virtual laboratory. The proposed system is expected to overcome many obstacles in performing the unit operations laboratory at the current setting. The server/client system implementation was programmed with ASP and Visual Basic. The availability of simple and efficient technological supports for dissemination and remote use of virtual lab systems supports more experimental practices regardless of the number of participating students and their locations. Variety of instruments, process equipments and lab procedures are being added to make it a complete package of virtual lab fur undergraduate unit operations course.

• Journal of Biomedical Engineering Research
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• v.6 no.1
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• pp.5-12
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• 1985

In this paper Kalman filtering technique is applied to ultrasound signal to improve resolution capability, Ivhlch is in use of diagnostic imaging systems. The main advantage of Kalman filter algorithm for the analysis of reflected ultrasound signal is its recursive structure which can be easily adapted to tlme varing system. Because soft-tissues, such as liver, act as distributed acoustic low-pass filters which continually change the propagating pulse. tIne can put to practical use above advantage to find a suitable signal generallng model. In state-space description of the system, the 6th order system produces tl)e 1)esc spectral approximation to the source pulse As a result of spectrum analysis, 6th order estimator for two closely spaced ((p.5 mm) reflectors enhances resolution by 4dB-lOdB. By using this result, the possibility to detect even minute tumor is demonstrated.

• Nuclear Engineering and Technology
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• v.51 no.2
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• pp.463-478
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• 2019

The most important non-functional requirements for dependability of any Embedded Real-Time Safety Systems are safety, availability and reliability requirements. System architecture plays the primary role in achieving these requirements. Compliance with these non-functional requirements should be ensured early in the development cycle with appropriate considerations during architectural design. In this paper, we present an application of system architecture modeling for quantitative assessment of system dependability. We use probabilistic model checker (PRISM), for dependability analysis of the DTMC model derived from system architecture model. In general, the model checking techniques do not scale well for analyzing large systems, because of prohibitively large state space. It limits the use of model checking techniques in analyzing the systems of practical interest. We propose abstraction based compositional analysis methodology to circumvent this limitation. The effectiveness of the proposed methodology has been demonstrated using the case study involving the dependability analysis of safety system of a large Pressurized Water Reactor (PWR).

• Journal of the Korean Institute of Landscape Architecture
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• v.18 no.2
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• pp.79-93
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• 1990

The purpose of this study is to establish better residential environment in APT. complex. In this study, the actual conditions of exterior space, user behavior and degree of satisfaction are investigated and analyzed on the 5 high-rise story APT complex in Taegu city. The results of this study were as follow ; The size and arrangement of organizational elemnnt to exterior space in APT. complex have been regulated by law and regulations as the buildings coverage and floor space index, but housinghold and accessibility to the racility will be simultaneously considered to raise Quality of the residential environoment. The main user behavior to exterior space in APT. complex was practical activity and the user behavior pattern by week and among APT. complex were found similiarly. In the ratio of use to exterior space in APT. Complex, that of high-rise residents were lower than that of lowrise residents. In the degree of satisfaction by property of variables to exterior environment In APT. comples, physical of buildings, social - psychologic, managerial economical, physical property of exterior space were estimated positively, but properly of facility were estimated negatively. The degee of satisfaction to exterior environment in APT. complex was highly Influenced by green space, site size. As a result of ractor analysis, the four factors were drawn out from exterior environment in APT. complex. and the factors that have an effect on the degree of residents' satisfaction by factorscore were found in the order of importance as fallow ; managemental, physical, environmental, organizalional factor. Therefore, devilopment of APT. complex should be considered in a view of environmental psychology according to physical organization for used in the future. It is recommended that this problems should be necessitated to be more deeply studies in the future.

• Journal of the Korean Institute of Rural Architecture
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• v.14 no.2
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• pp.1-10
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• 2012

The purpose of this study is to provide the method of saving the construction cost per unit area of the New Hanok using the inner space of a roof as a floor space with a structural modification of it's roof. The proportion of a roof of the Traditional Hanok accounts for about a half of it's elevation, so it is an essential element of it. But, compare to the whole construction cost of the Traditional Hanok, it costs over a half of expenses to build it. Recently, at the traditional building type, it is found that the inner space of a roof of it is used as a floor space with a structural modification of it's roof. It can be divided into two types, the storage type and the living type. The New Hanok at downtown can accommodate various new lifestyle, so the length of it's Yangtong is longer than that of the Traditional Hanok. When we adjust the proportion of the traditional Hanok to the New Hanok, the height of the column and the roof of the New Hanok becomes also higher than those of the traditional Hanok. So, using the upper part of the column and the roof of the New Hanok, we can make the inner space of a roof of the New Hanok as a floor space -like a bed room, tea room, personal work space and a storage- vertically connect with the 1st floor as the main living area. As a result, it is expected to save the unit construction cost of the New Hanok and has an extensity of space when we build the New Hanok at downtown.

• Satellite Communications and Space Industry
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• v.2 no.3
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• pp.83-92
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• 1994

Outer Space is existing as the opening-up frontier. The space activities included benefit-and-risk are now confronted with the challenge of arriving at just and effective rules for the use of space serving many technical, practical and conflicting legal, economic, political and military interests. Therefore many governments have developed domestic and international policies to respond to the opportunities and constraints engendered by space exploration and exploitation. the challenges of outer space toward the 21st century are being internationalized, commercialized, and privatized, militarized through the international cooperation and competition in space activities. For the future of mankind, futhermore the right to live of humankind, we must be positively interested in international space law which may give rise to international repercussions. I suggeste that many issues be resolved by international coordinating organization.