• Journal of Digital Convergence
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• v.17 no.6
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• pp.19-25
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• 2019

Recently a number of car sharing studies have been conducted that share vehicles from a consumer perspective. Meanwhile, Japan's MLIT had empirically implemented social experiment and policy for the installation of sharing car in order to make better use of the business forms and rapidly increasing car sharing associated with express bus as a new type of transaction from a sharing economy perspective. Therefore, this study examined the case of connecting with the express bus in Japan and analyzed and discussed the contents at the practical level. In addition, data collected for 229 car sharing users were verified empirically. The multiple liner regression analysis showed that three types of perceived values effect on the usage intention in the order of economic value, time value and psychology value. These findings suggest that car sharing users' perceived values are very important for increasing the degree of satisfaction with usage intention.

• Journal of the Economic Geographical Society of Korea
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• v.19 no.3
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• pp.437-456
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• 2016

The purpose of this study is to understand the locational characteristics of performing art industries and to investigate the linkages with local economy. For the purpose, we examine the spatial concentration of cultural and artistic resources in Korea first, and than focus on Seoul where the resources of performing art industries are concentrated to the utmost. To distinguish the distribution aspect and locational characteristics of performing art industries, we apply the Kernel density analysis and LISA (Local Indicator of Spatial Association) on the address data of performing art theater, gallery, and movie theater. In contrast to galleries and movie theaters. the spatial distribution pattern of performing art theaters reveals a unique local cluster centered on the Daehakro area. We confirm that the Daehakro area constitutes a performing art industry cluster in their dense distribution of various related activities making up the value chain of the performing art industry. Multiple regression analysis probes the related economic activities to explain the distribution of performing art theaters as well as the linkages with the local economic landscape.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.32 no.4_1
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• pp.335-341
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• 2014

The main goal of this study is on developing a proper brand-new data of national base map and Data Based(DB) model for new information technology environments. To achieve this goal, we generated a brand-new Hybrid spatial information model which is specialized in the spatio-temporal map structure, the framework map for information integration, and the multiple-layered topology structure. The DB structure was designed to reflect the change of objections by adding a new dimension of 'time' in the spartial information, while the infrastructure was able to connect/converge with other information by giving the unique ID and multi-scale fusion map structure. Furthermore, the topology and multi visualization structure, including indoor and basement information, were designed to overcome limitations of expressing in 2 dimension map. The result from the performance test, which was based on the Hybrid spatial information model, confirms the possibility in advanced national base map and conducted DB model through implementing various information and spatiotemporal connections.

• Journal of the Society of Disaster Information
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• v.12 no.1
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• pp.47-53
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• 2016

Techniques to be developed in this study is intended to apply to an existing integrated control system to "A Study on the multiple Texture Rendering system for three-dimensional Image Signal Recognition" technology or become a center of the building control system in real time video. so, If the study plan multi-image mapping system developed, CCTV camera technology and network technology alone that is, will be a number of security do not have to build a linked system personnel provide services that control while the actual patrol, the other if necessary systems and linked to will develop a system that can reflect the intention Ranger.

• Journal of Advanced Navigation Technology
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• v.2 no.1
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• pp.43-52
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• 1998

In this paper, we have investigated the effects of geographic information on the performance of multiple ground target tracking system using multiple sensors. Geographic information is utilized in two cases: association and masking target measurement. Virtually no improvement is observed to the overall performance of tracking system when we applied mobility to the association procedure. Masking target measurement based on mobility produces desirable result that the number of false tracks is reduced. Since geographic information can be regarded as an additional sensor in sensor fusion paradigm, careful usage is required.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.15 no.6
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• pp.71-77
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• 2015

In this paper, we propose a scheduling method for signal measurement and control algorithm execution in a multi-motor drive controller. The multi-motor controller which is used for vehicle control receives position/velocity command and performs position/velocity control and current control. Internal resource allocation and control algorithm execution timing are very important when one microcontroller is used for multi-motor drives. The control performance of the velocity control system is verified by varying ADC(Analog to Digital Converter) conversion timing and algorithm execution timing using real experiments.

• Korea journal of population studies
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• v.35 no.2
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• pp.185-208
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• 2012

This study examines how married immigrant women's social networks affect their life satisfaction in Korea. A multiple-regression analysis is conducted using data from Nationwide Multicultural Family Survey in 2009. The major findings are as follows. First, the frequency of keeping in touch with their family in the mother country significantly affects the level of satisfaction, while the family size in Korea is not making a significant difference. Second, the strength of "Korean Network" - strong bridging network - is highlighted. Third, family gathering variables affect the level of satisfaction. An interesting point is found from the nationality segmentation. The case of women from Japan, with the longest duration in Korea, shows that both of the family and the non-family gathering variables significantly affect the life satisfaction. It is interpreted that family network dominates in the earlier stage of marriage, but the other social networks also play the role as the duration extends.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.283-288
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• 2009

고정된 망을 가지지 않고, 이동 호스트로만 이루어져 통신되는 망인 Ad-hoc 네트워크에서 고속으로 이동 중인 차량들 간의 긴급한 정보를 주고받아 고속도로에서의 다중 충돌사고를 미연에 방지할 수 있는 차량 통신 프로토콜을 제안한다. 본 논문에서는 도로위의 차량들은 서로 연계성이 없기 때문에 위치추적시스템인 GPS에서 수신한 거리 값을 연계하여 클러스터를 구성한다. 클러스터를 IEEE 802.11 MAC 계층에서 구성하기 때문에 경로 설정으로 인한 과부하문제를 해소 하였다. 논문에서 제안한 액티브 네트워크 기반의 멀티 홉 라우팅 프로토콜은, Active 네트워크를 이용하여 안정된 통신이 이루어 질수 있도록 한다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1149-1150
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• 2011

일반적으로 BTB STATCOM은 계통 분리 운전이나 이종계통의 연계 등의 목적으로 이용한다. 기본 구성으로는 두 대의 STATCOM을 직렬로 연결하여 계통에 삽입되며, 구조 및 개념상 HVDC와 유사한 특징을 갖고 있다. 본 논문에서는 국내에서는 처음으로 독자 개발에 성공한 STATCOM의 기술을 바탕으로 BTB STATCOM의 제어 알고리즘을 설계하고, PSCAD/EMTDC를 이용하여 BTB STATCOM의 모델링 및 계통 연계 모의를 수행하였다. 모델링 및 모의를 통하여 설계 및 개발한 BTB STATCOM의 제어 알고리즘이 정상동작하며, 성공적으로 BTB STATCOM의 역할을 수행할 수 있음을 확인하였다.

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.62-64
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• 2008

본 연구에서는 펄스다중화 보조회로론 이용한 18-step Back-to-Back 전압원 컨버터를 제안한다. 제안하는 Back--Back 전압원 컨버터는 교류연계점에서 유 무효전력의 독립적인 제어가 가능하다. 펄스수를 증가시키는 방법은 이론적인 접근을 통해 분석하였으며, 제안하는 시스템의 동작은 PSCAD/EMTDC 소프트웨어로 시뮬레이션 모델을 개발하여 확인하였고 실질적인 성능검증은 하드웨어 축소모형을 제작하고 실험을 통해 실시 하였다.