• Title/Summary/Keyword: Dong District

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A Study on the Remodeling effectiveness of old low-rise residential areas for Senior Living (노후 저층주거지역 리모델링을 통한 노령인구 거주환경 개선효과에 관한 연구)

  • Kwon, Soon Jung;Jeong, Da Woon
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.25 no.3
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    • pp.85-97
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    • 2019
  • Purpose : The purpose of this study is to evaluate the remodeling effectiveness on old town in Songpa-Gu, Macheon-Dong in the point of elderly living. Methods : Main research method is interview with older residents living in Macheon-Dong. The surveyed district of old town is divided into two groups, one is experimental group and the other is control group. The interviews have been conducted two times; before the remodeling(September, 2017) and after the remodeling(May, 2019). Total number of questionnaire is about 400. Correlation analysis, T-test, regression analysis have been used for the interpretation of collected data. Results : The number of accident and road confusion of older residents in experimental group have been decreased after remodeling. Most preferred space is resting area, and older residents considers convenience and practicality as more important. 47.7% of respondents have evaluated dwelling site as good after remodeling. Implication : This study sends a meaningful message in that remodeling effect of old town has been analyzed quantitatively and dwelling area regeneration project of old town is positive for the improvement of dwelling environment.

Effect of Reducing Squeal Noise at Railway of Curve Section by using the Watering (살수를 이용한 철도곡선구간 스퀼소음 저감효과에 관한 연구)

  • Ji, Hae-Young;Koo, Dong-Hoe;Jeon, Seung-Woo
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2928-2933
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    • 2011
  • The urban railway has been planned not only the subway, but also the elevated railway in Seoul, South Korea. Therefore, it is steadily increasing civil complaints for railway noise passing through that residential district. In this paper, we focused on noise of squeal characteristics induced by interaction between railway vehicle's wheel and rail. Then we selected the point that carried out scattering water droplet to the rail and compared the noise level of the watering test results before and after. Scattering water test results showed that level of the noise reduced intermittently occurring high frequency characteristics of squeal noise as well as overall noise level. In the future, we will apply the sensor to the sprinkling system for noise reduction where the place of existing squeal noise is, and make a suggestion of this solution will be more economical, environmental-friendly, and appropriate to reduce the squeal noise occurred by railway vehicle than others.

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Development of Hazard Prediction Map S/W for Mountain River Road (산지하천도로 재해지도 작성을 위한 SW 개발)

  • Jang, Dae Won;Yang, Dong Min;Kim, Ki Hong
    • Journal of Korean Society of societal Security
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    • v.2 no.1
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    • pp.75-80
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    • 2009
  • The objectives of this research are to develop hazard prediction map S/W for mountain river road. This mountain river road disaster happens by debris flow, landslide, debris accumulation and this cause are locally rainfall and heavy rainfall. System is constructed to GIS base. This research app lied to Kangwondo. We developed protocol to analyze calamity danger in mountain district area and examined propriety system. Furthermore examined the DB required and expression plan for hazard map creation SW construction by mountain rivers road.

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A rerouting-controlled ISL handover protocol for LEO satellite networks

  • Dong, Wei;Wang, Junfeng;Huang, Minhuan;Tang, Jian;Zhou, Hongxia
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.6 no.10
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    • pp.2620-2631
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    • 2012
  • In this paper, a rerouting-controlled ISL (Inter-Satellite link) handover protocol for LEO satellite networks (RCIHP) is proposed. Through topological dynamics and periodic characterization of LEO satellite constellation, the protocol firstly derives the ISL related information such as the moments of ISL handovers and the intervals during which ISLs are closed and cannot be used to forward packet. The information, combined with satellite link load status, is then been utilized during packet forwarding process. The protocol makes a forwarding decision on a per packet basis and only routes packets to living and non-congested satellite links. Thus RCIHP avoids periodic rerouting that occurs in traditional routing protocols and makes it totally unnecessary. Simulation studies show that RCIHP has a good performance in terms of packet dropped possibility and end-to-end delay.

A study on estimating background concentration of groundwater for water quality assessment in non-water supply district (상수도 미보급 지역의 지하수 수질상태 평가를 위한 배경농도 산정방법에 관한 연구)

  • Yea, Young-Do;Seo, Yong-Gyo;Kim, Rak-Hyeon;Cho, Dong-Jun;Kim, Kwang-Shik;Cho, Wook-Sang
    • Journal of Korean Society of Water and Wastewater
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    • v.28 no.3
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    • pp.345-358
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    • 2014
  • For introducing the groundwater quality assessment using background concentration of groundwater, several methods had been studied to estimate the background concentration of groundwater and to suggest the background concentration of study area. Some methods such as Box whisker plot, Percentile and Cumulative probability distribution had been adopted to estimate background concentration, and it was evaluated that the Cumulative probability distribution method presents more reasonable background concentration because it can consider the data distribution. So we estimated the background concentration of study area using cumulative probability distribution method. We suggested the background concentration for each hydrogeology respectively in case hydrogeological water quality similarity is very low.

Analysis of Quality Management Practices in Steel Outfit Firms of Korean Shipbuilding Industry (철의장품을 생산하는 조선기자재 산업체의 품질경영 시스템 분석)

  • Park, Dong-Jun;Kim, Ho-Gyun;Jeong, Hyeon-Seok;Gang, Byeong-Hwan
    • Journal of Korean Society for Quality Management
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    • v.28 no.4
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    • pp.106-118
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    • 2000
  • We analyze the current quality management status for firms producing steel outfits of ships and develop an efficient QMS appropriate to Korean steel outfit industry. The firms recently obtained ISO 9000 certificates and are located in Pusan ${\cdot}$ Kyungnam district of Korea. The analysis is based on the audit results from ISO 9000 for seven steel outfit firms during last three years. We find out major requirements of ISO 9000 and investigate statistical relationship among major requirements, types of data, and groups of firms by using a statistical package, SAS. Recommendations regarding add-on requirements are suggested to install an efficient QMS in Korean steel outfit firms.

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Planning and Design of Honam High-Speed Railroad's Bridges (호남고속철도 4-2공구 교량 계획 및 설계)

  • Bae, Min-Hyuk;Woo, Dong-In;Cho, Hyun;Ahn, Kwang-Su;Han, Nock-Hee
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.1470-1477
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    • 2010
  • In 2004, Korea has become the world's fifth-express train states, Honam high-speed railroad which goes down another line with existing Kyoungbu high-speed railroad is divided 19 construction sectors, its total length is 230.9 km and it will be constructed by 2017. This site is located in Jeollabukdo Jeong-eup district along 9.38 km. There are three representative bridges. ;One is the PSC box girder bridge, another is the Extradosed bridge, and the other is the three continuous spans half-through hybrid arch bridge. This paper shows a planning and design of these bridges.

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The Study on the Prediction of Underground Temperature in Changwon District (창원지역의 지중온도 예측에 관한 연구)

  • Cho, Sung Woo;Ihm, Pyeong Chan
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.26 no.3
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    • pp.97-102
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    • 2014
  • For an analysis of the horizontal-type geothermal heat exchanger system, an understanding of the ground temperature distributions is required in order to predict system performance. Because it is difficult to decide on the underground temperature due to the adjustment of its temperature cycle, numerous calculations are required in order to decide on the temperature cycle. In this paper, Buggs formula is utilized to decide a phase shift for outdoor temperature and ground surface temperature, which are obtained from Korea Meteorological Administration. Overall, the underground temperature distribution in the Changwon region is predicted as $10.5^{\circ}C{\sim}20.3^{\circ}C$ at a depth of 3 m.