• Title, Summary, Keyword: 도시철도

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Railway Noise Exposure-response Model based on Predicted Noise Level and Survey Results (예측소음도와 설문결과를 이용한 철도소음 노출-반응 모델)

  • Son, Jin-Hee;Lee, Kun;Chang, Seo-Il
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.21 no.5
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    • pp.400-407
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    • 2011
  • The suggested method of previous Son's study dichotomized subjective response data to modeling noise exposure-response. The method used maximum liklihood estimation instead of least square estimation and the noise exposure-response curve of the study was logistic regression analysis result. The method was originated to modeling community response rate such as %HA or %A. It can be useful when the subjective response was investigated based on predicted noise level. It is difficult to measure the single source emitting noise such as railway because various traffic noise sources combined in our life. The suggested method was adopted to model in this study and railway noise-exposure response curves were modeled because the noise level of this area was predicted data. The data of this study was used by previous Ko's paper but he dealt the area as combined noise area and divided the data by dominant noise source. But this study used all data of this area because the annoyance response to railway noise was higher than other noise according to the result of correlation analysis. The trend of the %HA and %A prediction model to train noise of this study is almost same as the model based on measured noise of previous Lim's study although the investigated areas and methods were different.

A Study on Correlation between Job Stress and Metabolic Syndrome of Male Employees of Electronic Goods Manufacturer (전자제품 제조업체 남성근로자의 직무 스트레스와 대사증후군의 관련성)

  • Kim, Tae-Hee;Jung, Myung-Hee;Lee, Se-Hun
    • Korean Journal of Occupational Health Nursing
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    • v.25 no.1
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    • pp.55-64
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    • 2016
  • Purpose: The aim of this study was to investigate the association between job stress and metabolic syndrome among male workers. Methods: A total of 396 male workers employed in an electronic company, located in 'P' city, Gyeonggi Province, who had taken medical examination at the 'D' hospital, volunteered in this study. All the data used in this study were obtained from 'D' hospital after getting consent and permission from the workers. General and occupational characteristics, medical history, and health-related behaviors of the subjects were obtained by self-administered questionnaire. Results: The highest occupational stress by sub-sector was reported in the order of insufficient job control, organizational system, lack of reward, job demand, job insecurity, physical environment, job culture, and relationship conflict. The prevalence rate of metabolic syndrome of the participants was 19.9%. The results of the multiple logistic regression analysis on metabolic syndrome of the subjects indicated that the syndrome was significantly higher among those with family history, smoking habit and ex-smoking, working duration of 3 years and over, and with higher total score of occupational stress. It was significantly more prevalent, when the degree of stress was high in the sub-sectors of occupational stress; job autonomy, job insecurity, lack of reward, and job culture. Conclusion: In conclusion, it is necessary to implement a plan to efficiently manage the job stress of these male workers, as the probability of metabolic syndrome increased with the increase of occupational stress. Furthermore, considering the highest occupational stress was found to be job autonomy among its sub-sectors, it is necessary to prepare various measures to enhance the autonomy of such employees.

Assessment of National and Regional Plans Using Integrated Management Index of Korea National Planning and Environmental Planning for Present Status Evaluation (국토계획과 환경계획 통합관리 지표의 적용을 통한 통합관리 현황 평가)

  • Heo, Han-Kyul;Lee, Dong-Kun;Sung, Hyun-Chan;Heo, Min-Ju;Park, Jin-Han
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.22 no.4
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    • pp.81-91
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    • 2019
  • Integrated management of Korea national and environmental planing for sustainable development is suggested, and basic research is needed. In this study, national and regional plans were assessed using 'integrated management index of Korea national planning and environmental planning' to grasp the current status of integrated management on Korea national planning and environmental planning. As a result of the assessment, it was found that both national and regional plans need to improve considering the natural ecology part and water resource and quality part. In addition, it was derived that the detailed contents of the indicator can not be reflected according to the characteristics in the higher-level plan. Therefore, it has been found necessary to include proclamatory contents so as to be able to establish a detailed plan that reflects environmental goals in the lower-level plan.

A Model for Analyzing Time-Varying Passengers' Crowdedness Degree of Subway Platforms Using Smart Card Data (스마트카드자료를 활용한 지하철 승강장 동적 혼잡도 분석모형)

  • Shin, Seongil;Lee, Sangjun;Lee, Changhun
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.18 no.5
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    • pp.49-63
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    • 2019
  • Crowdedness management at subway platforms is essential to improve services, including the prevention of train delays and ensuring passenger safety. Establishing effective crowdedness mitigation measures for platforms requires accurate estimation of the congestion level. There are temporal and spatial constraints since crowdedness on subway platforms is assessed at certain locations every 1-2 years by hand counting. However, smart cards generate real-time big data 24 hours a day and could be used in estimating congestion. This study proposes a model based on data from transit cards to estimate crowdedness dynamically. Crowdedness was defined as demand, which can be translated into passengers dynamically moving along a subway network. The trajectory of an individual passenger can be identified through this model. Passenger flow that concentrates or disperses at a platform is also calculated every minute. Lastly, the platform congestion level is estimated based on effective waiting areas for each platform structure.

A Study for Service Orientation's of Field Staff Effect on the GWP (현장직원의 서비스 지향성이 GWP에 미치는 영향)

  • Kim, Young S.;Kim, Hyunsoo
    • Journal of Service Research and Studies
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    • v.5 no.1
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    • pp.1-15
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    • 2015
  • Service has its aim to maximize customer loyalty for companies to improve business productivity by differentiation from the competition. Public transport services using, the needs and demands of consumers also appear very differently than in the past, looking at the service of the company eye-level of the consumer Is increasing more and more. In order to survive in this environment, companies work together to improve the level of service and ensure customer loyalty is essential. In order to improve our service. What's more, it can be said that it is important to actively participate in the work of the internal customer, employee morale boost. In order to improve customer satisfaction has a service-oriented members should respond to customers and make a good company to work also affects the internal staff to verify this service-oriented and affect. In this study, to be urban rail service orientation of the staff working in the field of operational agencies in the future to measure the impact of many companies to promote the GWP proposes to create a good business implications.

Fragility Analysis for Evaluation and Comparison of Seismic Performance of Building Structures (취약도 해석을 통한 빌딩구조물의 내진성능 비교 및 평가)

  • Park, Joo-Nam;Choi, Eun-Soo
    • Journal of the Earthquake Engineering Society of Korea
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    • v.11 no.3
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    • pp.11-21
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    • 2007
  • Potential damage and losses associated with structural systems caused by earthquake can be reduced by application of seismic design to the structures. Because the building cost required for seismic design is generally higher than the cost for non-seismic design, the application of seismic design must be justified considering both seismic performance and cost. This paper presents a risk-based fiamework for evaluation and comparison of seismic performance of structures such that necessary data can be supplied for decision making on seismic design. Seismic fragility curve is utilized for seismic risk assessment of structures, and the process for decision analysis on adaptation of seismic design is presented based on the equivalent cost model.

Analysis of cause and deterioration about using 3-Arch tunnel (공용중인 3-Arch터널의 열화조사 및 원인분석)

  • Lee, Yu-Seok;Park, Sung-Woo;Whang, In-Baek;Shin, Yong-Suk;Kim, Sun-Gon
    • Journal of Korean Tunnelling and Underground Space Association
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    • v.11 no.1
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    • pp.97-105
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    • 2009
  • This paper studied the cause of the deterioration of the four 3-Arch tunnels built in mid-1990. The common deteriorations of the four 3-Arch tunnels were longitudinal cracks, leakage and efflorescence at the same parts of lining concrete. Three fourths of 3-Arch tunnels, there was high percentage longitudinal cracks and a quarter was low frequency about longitudinal cracks. So the material reviewed to find out the differences between two groups in construction process and analysis was conducted such as non-destructive testing, precise visual survey and safety evaluation of one tunnel which had bad ground condition As the result, the tunnels were safety condition and the primary deterioration occurred during the construction process, namely, problems arrangement of rebar and the effects of the blast at middle tunnel.

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A Study Over the Relationship Between Apartment Prices and Distances from Expressway interchanges (In the case of the Seoul Beltway) (고속도로 인터체인지 이격거리와 주변 아파트 가격의 관계연구 (서울외곽순환고속도로 영향권을 중심으로))

  • O, Heung-Un;Kim, Tae-Ho
    • Journal of Korean Society of Transportation
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    • v.27 no.6
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    • pp.89-96
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    • 2009
  • The present study is performed to identify the relationship between apartment prices and distances from freeway interchanges. To collect consistent data and to simplify the sphere of the influence, the Seoul beltway was selected as the target road. Two sides of the Seoul beltway such as the inner side and the outer side are partitioned following the whole beltway line. The maximum distance to be taken care of in data collection was 6.0km from freeway interchanges. Results show that there exist consistent patterns between apartment prices and distances from freeway interchanges. In detail, if the apartment is located on the sphere of the influence, it is shown that a) the prices are increased overall b) the prices are low at very near of interchanges c) the prices are increasing up to the points of about 2.0~4.0km from interchanges d) the prices are decreasing after the points. Additionally, it is shown the pattern observed was following approximately a quadratic curve which is different from the liner curve obtained from the similar study over the sphere of the influence in railway(Subway).

Applicability Evaluation of Precast Deck to the Maglev Guideway System : Static Performance Test (프리캐스트 바닥판의 자기부상열차 가이드웨이 시스템 적용성 평가 : 정적 성능 실험)

  • Jin, Byeong-Moo;Kim, In-Gyu;Kim, Young-Jin;Lee, Yun-Seok;Ma, Hyang-Wook;Oh, Hyun-Chul
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.985-988
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    • 2008
  • Maglev is a system that a train runs levitated above a rail. Therefore it is very important to maintain a constant levitation gap for achieving serviceability and ride comfort. This study is a cooperation research subject of the 3-1 subject, performance improvement of maglev track structures, of the Center for Urban Maglev Program in Korea, started in 2006. The aim of this study is development of rapid constructions of bridge superstructure for maglev. At present, precast deck is widely used because of its superiority to cast-in-place concrete on quality and the term of works. The research group suggested basic systems of maglev guideway with PSC-U type and trapezoidal open steel box type girder, and precast deck, cooperating with Korea Railroad Research Institute, the managing institute of the 3-1 subject. In this study, full-scale structure was fabricated for structural safety evaluation of precast decks and rail, and a static performance test of those structures was performed.

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Analysis of Influences on the Coast Construction Facilities depending on Sea Level Rise (해수면 상승에 따른 연안 건설시설물의 영향 분석)

  • Park, Jun-Young;Bu, Yang-Su;Lee, Dong-Wook
    • Proceedings of the KAIS Fall Conference
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    • pp.825-828
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    • 2009
  • 기후변화는 기상재해뿐만 아니라 지속적인 해수면 상승의 원인이 되고 있으며, 자연 생태계화 인간의 사회, 경제시스템 전반에 걸쳐 영향을 미치고 있으며, 건설분야도 이와 무관하지 않다. 특히 기후변화는 해수면 상승으로 이어져 사회기반시설인 항구, 연안도로, 철도, 빌딩 등과 연안산업인 석유 및 석유화학공장, 그리고 서비스업인 관광에 대한 위협으로 나타나고 있다. 이러한 해수면 상승은 토지 및 건물의 재산 가치 하락과 해수면 상승에 따른 보호비용 증대, 구조물의 급속한 노후화에 따른 유지관리비용의 증가뿐만 아니라 정치적 제도적 불안 및 사회동요 등을 유발할 수 있다. 우리나라의 경우, 지난 100년간 6대 도시 평균기온이 약 $1.5^{\circ}C$ 상승하였으며, 해수면(제주기준)은 40년간 22cm가 상승하였다. 특히 제주의 경우 매년 5mm씩의 해수면 상승을 보이고 있으며 이는 전 지구 해수면 상승률보다 3배 높은 수치이다. 본 연구는 해수면의 상승에 따른 건설분야의 영향을 분석하기 위한 선도적인 연구로서, 연구의 범위를 제주지역에 국한하였으며, 해수면 상승에 따른 영향 지역을 추출하고, 영향 지역 내 건설시설물 정보를 추출하기 위한 절차를 규명하였다. 본 연구 결과는 유지보수 및 시설물 이설에 따른 공사비 산출의 근거가 될 뿐만 아니라 관련 예산 확보에 대한 근거 자료로 활용될 수 있을 것이다. 향후 관련 지역의 유지보수 및 이설 공사비 정보의 추출 및 DB 구축을 통해 연안 건설 시설물의 이설에 따른 공사비를 예측할 수 있을 것이다.

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