• Proceedings of the KSR Conference
• /
• 2011.10a
• /
• pp.1143-1148
• /
• 2011

In this study, seismic structural reinforcement are carried out, based on the estimated seismic performance of underground box structures in urban railway, and displacement based design method was developed to enhance seismic performance of structures. New seismic reinforcement design method is proposed and compared with existing design methods. And presented an overview of the developed design methodology through a design example to verify the validity of that methods.

• Journal of the Korean Solar Energy Society
• /
• v.34 no.5
• /
• pp.101-108
• /
• 2014

The performance of the daylighting in buildings depends on building site and shape. As an energy saving design strategy, daylighting is a key issue in green building design. In this paper, the influence of the adjacent or obstructed building on daylighting performance of the office building in urban area was analyzed. A typical office building about 20 storeys with obstructed buildings has been modeled and simulated using Radiance. The parametric simulations have been performed to analyze the influence of the daylighting performance (illuminance, luminance) of the analyzed office. The results show that the possibility of the glare was decreased when the obstructed building is located in south, also the illuminance level was significantly decreased. When the obstructed building is located in north, the changes of the illuminance level and luminance possibility were somewhat small compared to the unobstructed condition. The daylighting performance of the analyzed building was most affected by the obstructed building in winter season.

• 한국신재생에너지학회:학술대회논문집
• /
• 2009.11a
• /
• pp.501-504
• /
• 2009

In order to investigate of possibility for developing urban wind power, wind profile and wind power density are estimated using Sodar and Lidar based on surface. Since poor performance of Sodar and Lidar are often shown in a paticular meteorological condition, inter-comparison and validation with radio-sonde for each of instruments are performed. As a result, Lidar shows a good performance and wind data from Lidar are used to analyze wind profile and wind power density. It can be found that a wind power system mounted tall building in urban area is very attractive.

• Proceedings of the KSR Conference
• /
• 2008.06a
• /
• pp.1549-1552
• /
• 2008

Urban transit consists of signaling system, railway systems, power facilities systems and the other complicated facilities and the standards notify the standardizations, safety standards, performance standards and quality certification standards according to the Urban Transit Act. The government notifies and recommends these standards to improve the performance, safety and maintenance efficiency of urban transit. Now, we need to manage the records and traceability of the standards because they have reciprocal relations with the others so that, if some standards have been changed it could make some problems to the others. As a result, in this research, we suggest the way to manage the traceability of the standards by using the computation support tools.

• Proceedings of the KSR Conference
• /
• 2008.11b
• /
• pp.2065-2069
• /
• 2008

Urban transit consists of signaling system, railway systems, power facilities systems and the other complicated facilities and the standards notify the standardizations, safety standards, performance standards and quality certification standards according to the Urban Transit Act. The government notifies and recommends these standards to improve the performance, safety and maintenance efficiency of urban transit. Now, we need to manage the records and traceability of the standards because they have reciprocal relations with the others so that, if some standards have been changed it could make some problems to the others. As a result, in this research, we suggest the way to manage the traceability of the standards by using the computation support tools.

• Proceedings of the KSR Conference
• /
• 2008.11b
• /
• pp.157-161
• /
• 2008

The main purpose of this study is to analysis of urban MAGLEV vehicle for the Incheon International Airport Maglev railway, in the process of construction at the moment, in Korea. For analysis of urban MAGLEV, we have measurement power a special quality of MAGLEV operating the center science museum in Deajeon. 1) The power property related to urban MAGLEV vehicle demand on the Incheon International Airport Maglev railway track and substation capacity compared to the result given. 2) The optimum design of substation is determined based on the analysis. 3) The equipments of substation are determined based on the analysis. The result of measurement performance, therefore, enables us to reflect the good property, to the power supply design. The result of research performance, therefore, enables us to reflect the Power Supply System design for the stabilized and economized MAGLEV operation.

• Journal of Auto-vehicle Safety Association
• /
• v.15 no.2
• /
• pp.21-27
• /
• 2023

This paper presents a simulation tool for developing and evaluating automated driving systems' lane change algorithm in urban congested traffic. The behavior of surrounding vehicles was modeled based on driver driving data measured in urban congested traffic. Surrounding vehicles are divided into aggressive vehicles and non-aggressive vehicles. The degree of aggressiveness is determined according to the lateral position to initiate interaction with the vehicle in the next lane. In addition, the desired velocity and desired time gap of each vehicle are all randomly assigned. The simulation was conducted by reflecting the cognitive limitations and control performance of the autonomous vehicle. It was possible to confirm the change in the lane change performance according to the variation of the lane change decision algorithm.

• Structural Monitoring and Maintenance
• /
• v.5 no.1
• /
• pp.129-150
• /
• 2018

This paper presents the structural performance monitoring of an urban footbridge located in Hangzhou, China. The structural health monitoring (SHM) system is designed and implemented for the footbridge to monitor the structural responses of the footbridge and to ensure the structural safety during the period of operation. The monitoring data of stress and displacement measured by the fiber Bragg grating (FBG)-based sensors installed at the critical locations are used to analyze and assess the operation performance of the footbridge. A linear regression method is applied to separate the temperature effect from the stress monitoring data measured by the FBG-based strain sensors. In addition, the static vertical displacement of the footbridge measured by the FBG-based hydrostatic level gauges are presented and compared with the dynamic displacement remotely measured by a machine vision-based measurement system. Based on the examination of the monitored stress and displacement data, the structural safety evaluation is executed in combination with the defined condition index.

• Journal of Agricultural Extension & Community Development
• /
• v.24 no.1
• /
• pp.21-31
• /
• 2017

The purpose of this study was to analyze the structural relationships between adult educators' instructional leadership, learners' motivation and performance among those participants in education for urban-rural migration. The survey was conducted among 22 agricultural educational institutions in South Korea, and a total number of 1,109 learners responded to a questionnaire. In order to verify the hypothesized research model, the collected data were analyzed with structural equation modeling. The major findings of this study were as follows. First, adult educators' instructional leadership had a direct effect and an indirect effect on learners' performance. Second, adult educators' instructional leadership had a direct effect on learners' motivation. Third, learners' motivation had a direct effect on learners' performance.

• 연구논문집
• /
• s.27
• /
• pp.5-13
• /
• 1997

Test results of urban transit maglev system(UTM-01) are reported. Maglev project team in KIMM, in cooperation with Hyundai Precision Company and the Korea Electric Research Institute(KERI), has been developing a prototype urban transit vehicle since 1995. Since last May, we have been trying to improve performance of the first vehicle UTM-01 both in levitation and propulsion systems. In this paper, we report various test results of the vehicle UTM-01, present status and future prospect, and what have been done so far to assure its required performance.