• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.5165-5176
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• 2010

This study is an attempt to seek ways to revitalize the main streets in local city with regard to urban regeneration. It focuses on the case of Myeong-dong Fashion Street located in front of Cheonan Station, which recently lost its vitality. In order to explore causes of the decline and solutions for restore, this paper investigate the concerned urban area by approaching through three different aspects: physical and environmental aspects, social and economic aspects, historic and cultural aspects. In addition, the street visitors were surveyed on their visiting patterns, priorities and discontents about the components of street, and preferences for its restoring, etc. The investigation resulted in following findings and proposals. In physical and environmental dimension, it is needed to create legal incentives for encouraging local residents to develop their own district, and suggested to plan green space for relaxation and cultural arts space by using existing buildings, along with the expansion of public parking. In regard of social economic aspects, it is proposed to give each street specialized commercial theme. At the historic and cultural level, it is suggested to plan the pedestrian network which links the Fashion Street with surrounding historic elements.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.42 no.9 s.339
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• pp.51-60
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• 2005

The design of efficient cryptosystems is mainly appointed by the efficiency of the underlying finite field arithmetic. Especially, among the basic arithmetic over finite field, the rnultiplicative inversion is the most time consuming operation. In this paper, a fast inversion algerian in finite field $GF(2^m)$ with the standard basis representation is proposed. It is based on the Extended binary gcd algorithm (EBGA). The proposed algorithm executes about $18.8\%\;or\;45.9\%$ less iterations than EBGA or Montgomery inverse algorithm (MIA), respectively. In practical applications where the dimension of the field is large or may vary, systolic array sDucture becomes area-complexity and time-complexity costly or even impractical in previous algorithms. It is not suitable for low-weight and low-power systems, i.e., smartcard, the mobile phone. In this paper, we propose a new hardware architecture to apply an area-efficient and a synchronized inverter on low-complexity systems. It requires the number of addition and reduction operation less than previous architectures for computing the inverses in $GF(2^m)$ furthermore, the proposed inversion is applied over either prime or binary extension fields, more specially $GF(2^m)$ and GF(P) .

• Journal of Advanced Navigation Technology
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• v.11 no.4
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• pp.371-377
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• 2007

Ionospheric time delay is one of the main error source for single-frequency DGPS applications, including time transfer and Wide Area Differential GPS (WADGPS). Grid-based algorithm was already developed for WADGPS but that algorithm is not applicable to geomagnetic storm condition in accuracy and management. In geomagnetic storm condition, the spatial distribution of vertical ionospheric delay is noisy and therefore the accuracy of modeling become low in grid-based algorithm. For better accuracy, function based algorithm can be used but the continuity of correction message is not guranteed. In this paper, we propose the ionospheric model using wavelet based algorithm. This algorithm shows better accuracy with the same number of correction message than the existing spherical harmonics algorithm and guarantees the continuity of correction messages when the number of message is expanded for geomagnetic storm condition.

• Journal of Digital Convergence
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• v.10 no.10
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• pp.289-294
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• 2012

In this paper, we take advantage of the characteristics of mobile smartphones can be serviced without the constraints of time and space, and Study was developed by a variety of mobile services were done in a traditional offline can be implemented in real-time Case Management Community. To this end, in addition to general PC/laptop, smart mobile until the configuration interface provide the same environment for HTML5 Web Switching and Optimal Network on the same device-specific browser Size to the implementation of the next generation of Web standards, HTML5-based integrated case management Web and Mobile Web. Hybrid App Development OS supports various kinds of smart devices based on SenchaTouch Mobile Framework between the server real-time synchronization and message through the implementation of the Push Notification function, administrators and guardians real-time two-way communication between the subjects is a real-time implementation of the system was implemented Case Management Community.

• Journal of Broadcast Engineering
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• v.22 no.5
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• pp.560-569
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• 2017

Recently as the studies on the combined delivery over multiple transmission media are progressed, studies using MMT which is next-generation multimedia transport standard are underway. They are about transmitting video data layered by SHVC through broadcasting network and communication network based on MMT. However, it is difficult to serve synchronized UHD contents in heterogeneous network environment based on MMT, because MMT standard doesn't fully specify the information to indicate the relationship between media. Also, the service that we want to propose in this paper is a broadcasting-based service such as terrestrial broadcasting. Therefore the user must be able to watch various contents continuously. However, the MMT PI(Presentation Information) that controls the spatio-temporal layout of a content has been described as providing only one content. In this paper, we propose the structure of MXD document and MMT PI to provide continuous UHD contents service based on heterogeneous network.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.30 no.9
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• pp.17-26
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• 2001

최근 국제적인 여건과 사회적인 상황이 급변하여 대량생산-대량소비지향으로 인한 폐기물의 대량방출사회에서 지구환경보전을 중시하는 사회로 전환되어 가고 있다. 지구환경의 보전을 위하여 다양한 분야에서 각종 논의가 진행되고 있는 가운데 건축분야에서도 지구기후변화에 영향을 미치는 것으로 알려져 있는 이산화탄소배출의 억제와 폐기물 삭감 등에 대한 관심이 증대되고 있다. 최근 관심이 집중되고 있는 건축물의 장수명화와 리모델링도 이러한 움직임과 궤틀를 같이 하는 것이다. 물론 리모델링은 신축시장의 급감에 따른 대체시장으로서 검토되고 있는 측면이 더 크게 작용하고 있는 것도 사실이지만, 그동안 신축에 대한 집중적인 투자에 중점이 두어져 재고건축물에서 간과해 왔던 유지관리와 리모델링에 대한 중요성 인식이 결부되어 있다고 보여진다. 사실 지금까지 리모델링이 전혀 이루어지지 않았던 것이 아니라 일반건축물 부문에서는 상당부분 이루어져 왔으며, 공동주택 부문에서도 극소수 이루어져 왔다. 리모델링에 대한 정의와 개념을 어떻게 보느냐에 따라 많은 차이가 있을 수 있지만, 리모델링은 건축물 또는 외부공간의 성능 및 기능의 노후화나 진부화에 대응하여 보수, 수선, 개수, 부분증축 및 개축, 제거, 새로운 기능추가 및 용도변경에 이르는 광범위한 행위를 포함한다. 리모델링을 통하여 건축물의 성능을 유지하거나 향상시켜 쾌적하고 건강한 건축물의 재고 를 구축함과 아울러 건강한 지역환경을 조성하여 국민생활의 질적인 향상을가져옴으로써 환경을보전하 고 자원낭비를 줄여 지속가능한 건축물과 사회를 만들어 갈수있도록 하는 것이다. 건축물에서 리모델링을 하게 되는 동기는 시간이 흘러 물리적인 측면이나 기능적인 측면에서 노후화가 발생하거나 기능적인 요구가 변화함에 따라 건설당시의 성능이나 기능유지가 어렵거나 건설당시의 기능만으로는 요구조건을 만족함 수 없기 때문에 건설 당시의 수준을 유지하거나 새로운 요구에 적합하도록 향 상시키기 위해서는 물리적 또는 기능적인 개선이나 개량이 필요하기 때문이다. 물리적인 개선이나개량을위하여 중요한것은건축 물을 구성하는 자재나 부품의 수명문제이다. 수명의 길이차이가 건축물의 리모델링에 영향을 주고 있을 뿐만 아니라 서로 다른 수명의 자재나 부품의 접합상태가 리모델링 공사에 많은 영향을 미치게 된다. 리모델링 공사가 신축공사의 70-80% 정도의 공사비가 소요되기 때문에 리모델링 공사가 어렵다는 업체의 불만은 바로 이러한 점을 극명하게 드러내는 좋은 사례이다. 본 고는 이러한 측면에서 건축물의 장수명화를 근간으로 한 설비의 리모델링을 용이하게 하기 위한 건축 계획 및 구법에 대하여 고찰하고자 한다. 그리고 본 고는 기존건축물의 설비자체의 보수나 개수를 용이하게 하는 것에 초점이 맞추어진 것이 아니라 건축설계 및 시공시에 향후 설비부분을 용이하게 개.보수할 수 있도록 배려하는 측면을 중심으로 설명하였다.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.6
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• pp.899-905
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• 2013

In this paper, we focus on how to calibrate multi-cameras easily and how to efficiently detect quad-copters with small-numbered particles. Each particle is a six dimensional vector that is composed of 3D position and 3D orientation of a quad-copter in the space. Due to curse of dimensionality, that leads to explosive computational costs with a large amount of high-dimensioned particles. To detect efficiently, we need to put more particles in very promising spaces and few particles in other spaces. Though computational cost is lowered by minimizing particles, in order to track a quad-copter with multiple cameras in real-time, multiple images from the cameras should be synchronized and analyzed. Therefore, lots of the computations still need to be done. Because of this, GPGPU(General-Purpose computing on Graphics Processing Units) is implemented for parallel computing. This method has been successfully tested and gives accurate results in practical situations.

• Journal of Korea Multimedia Society
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• v.7 no.8
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• pp.1145-1161
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• 2004

The purpose of this research is to establish a method for the construction of a multimedia electronic dictionary system by integrating the media data available from linguistic resources on the Internet. As the result of this study, existing text-oriented electronic dictionary systems can be developed into multimedia lexical systems with greater efficiency and effectiveness. A method is proposed to integrate the media data of linguistic resources on the Internet by a web browser. In the proposed method, a web browser carries out all the work related to integration of media data, and it does not need a dedicated server system. The system constructed by our web browser environment integrates text, image, and voice sources, and also can produce moving pictures. Each media is associated with the meaning of data so that the data integration and movement may be specified in the associations. SMIL documents are generated by analyzing the meaning of each data unit and they are executed in a web browser. The proposed system can be operated without a dedicated server system. And also, the system saves storage space by sharing the each media data distributed on the Internet, and makes it easier to update data.

• Journal of Advanced Navigation Technology
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• v.20 no.1
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• pp.65-71
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• 2016

Quantum-dot cellular automata (QCA) consists of nano-scale cells and demands very low power consumption so that it is one of the alternative technologies that can overcome the limits of scaling CMOS technologies. Typical BCD-EXCESS 3 code converters using QCA have not considered the scalability so that the architectures are not suitable for a large scale circuit design. Thus, we design a BCD-EXCESS 3 code converter with scalability using QCADesigner and verify the effectiveness by simulation. Our structure have reduced 32 gates and 7% of garbage space rate compare with typical URG BCD-EXCESS 3 code converter. Also, 1 clock is only needed for circuit expansion of our structure though typical QCA BCD-EXCESS 3 code converter demands 7 clocks.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.11B
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• pp.1373-1382
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• 2011

Zigbee is communication technology most ideal because Zigbee support low power communication and wide expansion in wireless home network. However, Zigbee is not popular, because of Zigbee always has Hidden Node Problem and Transit Delay Problem. We propose new Beacon Frame structure to solve the two problem in Zigbee. New Beacon Frame structure reduces a Super Frame Duration and add a same space of a Control Frame Duration. We expect to solved method of Hidden Node Problem that exchange terminal information to using RTS/CTS. Also, We expect to solved method of Transit Delay Problem that put Beacon between Control Frame Duration and Super Frame Duration for synchronization. We confirm new Beacon Frame to solved two problem in OPNET simulation at Zigbee QoS Parameters. We measure Delay(sec) for solution degree of Transit Delay Problem, and measure Throughput(bits/sec) and Load (bits/sec) for solution degree of Hidden Node Problem.