• Title/Summary/Keyword: urban control point

Search Result 129, Processing Time 0.029 seconds

A Study on the Aesthetic Preference for Rural Landscapes: urban and rural resident differences (도시 및 농촌거주자의 농촌경관선호도에 관한 연구)

  • 윤진옥;김유일;정기호
    • Journal of the Korean Institute of Landscape Architecture
    • /
    • v.23 no.2
    • /
    • pp.93-103
    • /
    • 1995
  • The changes of rural landscape are currently spread everywhere and are rapidily being processed both in quality and in quantities of changes From such aspects, it is urgent to control the land scape change, and is required to know what is valued or preferred in rural landscape, This study was conducted to investigate preferences and differences of the responses between urban and rural residents to rural scenery. As a method, color-slide surrogates for rural landscape settings are shown to urban and rural residents, For a given 52 scenes of rural landscapes the respondents judged the familiarity, orality, and preference along a ten point scale. The following facts are found: 1) Refponses to certain types of landscape settings are influenced by the place of residence of the respondents. The urban residents highly rated natural components of the rural landscape. In contrast rural residents preferred the scenes with visible sign of development 2) The relations among the estimation of preference, familiarity and rurality in rural landscape were deeply correlated. When the rural lands(:ape is adequately ref resented as 'familiarity' or 'rurality' well the landscape is more preferred 3) It is found what is valued or preferred in rural landscape : Readjusted agricultural land, big tree, grassland hi dominated visually were preferred in rural landscape. The implication of this study is that successful planning of development or management in rural area will occur only when these different needs and values are acknowledged and accommodated.

  • PDF

Improvement of 3D Modeling Process of Facilities Based on GNSS_RTK Drone (GNSS RTK 드론 기반 시설물의 3차원 모델링 향상)

  • Lee, Yong Chang;Kang, Joon Oh
    • Journal of Urban Science
    • /
    • v.13 no.1
    • /
    • pp.33-42
    • /
    • 2024
  • In recent years, drones are expanding their use as highly efficient smart support equipment in all industries, including military as well as urban engineering planning and design, construction, In particular, the advancement of drones and GNSS(global navigational satellite system) positioning services, the high efficiency of visible color image RGB sensors, and various selective convergence between thermal infrared sensors and lidar scanning visibility sensors are becoming a key source of spatial information acquisition in the field of construction information modeling(BIM) and 3D digital twin modeling. This study seeks to improve the efficiency of field and office works in drone aerial photography in 3D modeling of urban facilities. For these, after acquiring the 3D location of the drone aerial photography point in two positioning modes, standard GNSS surveying and GNSS RTK precise positioning, the 3D productions were reproduced through the SfM(structure from motion) image analysis process, and the accuracy and efficiency of the work process were compared and considered. As a result of the study, when GNSS RTK precision positioning (VRS ; virtual reference service) is applied during outdoor filming, it was possible to reproduce and demonstrate the effectiveness of the digital twin modeling within the allowable range by omitting the GNSS surveying for additional ground control points and geo-tagging for the real-world model conversion of 3D image analysis results in image processing.

Application of GWLF Model to Predict Watershed Pollutant Loadings (오염부하량 산정을 위한 GWLF 모형의 적용)

  • Jang, Jung-Seok;Lee, Nam-Ho
    • Journal of Korean Society of Rural Planning
    • /
    • v.7 no.1 s.13
    • /
    • pp.77-88
    • /
    • 2001
  • In order to evaluate the applicability of GWLF model which can efficiently estimate non-point and point source pollutant loadings in rural watershed including urban district, the model was applied to an experimental watershed. The model was calibrated using observed data such as daily runoffs, sediment yields, T-N, and T-P. Simulated daily runoffs and sediment yields by the model using calibrated parameters were in food agreement with the observed data. There were difference between the simulated and observed nutrient loading which was considered resonable. The simulated results by the model showed that T-N, T-P and sediment yields were dependent on the amount of stream runoff discharge and land use. GWLF model is believed to applicable to estimate amount of pollutant loading of non-point source pollution for the water qualify control of agricultural watersheds.

  • PDF

System Assurance and Safety Assessment Activities of Urban Marglev ATC Project based on IEC Standards (IEC 규격에 기반한 도시형자기부상열차 열차제어시스템의 시스템보증 및 안전성 평가 활동)

  • Baek, Young-Goo;Park, Hee-Jun;Gu, Jung-Suh;Seo, Do-Seok;Lee, Key-Seo
    • Proceedings of the KSR Conference
    • /
    • 2010.06a
    • /
    • pp.1669-1679
    • /
    • 2010
  • Related to the on-going "Train Control System Project of Pilot Line Construction for Urban MAGLEV Train", activities by each phase shall be conducted to achieve SIL4 level and obtain safety certification from the Independent Safety Assessment(ISA), based on the IEC standards((IEC 62278/62279 and IEC 62425) for the first time in Korea. This thesis describes the introduction of IEC standards, system assurance activities (such as plan, analysis, test, verification and validation) in compliance with requirements management and project life-cycle and relations with the safety assessment activities; and certification activities (such as document reviews and audits) through system RAMS activities, software quality assurance activities and safety assessment, for the purpose of achieving a successful safety certification at the time of completing the project as system assurance activities including software and safety certification activities in order to acquire the safety certification for train control system which does not exist at all in domestic cases. It is believed that overall system safety assurance activities in this project will contribute to develop more upgraded products of the domestic train control system on the quality and safety point of view, find overseas markets and establish a bridgehead in the future.

  • PDF

Changes in Stream Water Quality According to Land Use at Kyong-an Stream (京安川 流域의 土地利用에 따른 河川物質의 變化)

  • Yim, Yang-Jai;Bang, Je-Yong;Kim, Yoon-Dong
    • The Korean Journal of Ecology
    • /
    • v.18 no.3
    • /
    • pp.341-351
    • /
    • 1995
  • The relationship between land uses and water quality was investigated at Kyong-an Stream. Some 70% of this watershed was forested area, half of which was comprised of Pinus densilflora community. Concentrations of $NH_4^{+},\;NO_3^{-},\;NO_2^{-}, total nitrogen, $Cl^{-},\;PO_4^{3-}$, DO, and BOD increased gradually from upstream to downstream, whereas heavy metals did not have such tendancy with the exception of a few sites. Urban area was significantly correlated with hardness and chloride concentration. Relationship among phosphate concentration(P), cultivated field area(F), and stream length(S) in each basin was P = 1.7912 F/S+0.0103. the concentration of $NH_4^{+}$ was positively correlated with the population size and cow density within the catchment. The effect of urban area(U) and stream length of the pH(pH) was represented by pH = -4.7344 U/S+6.52. It can be concluded that the control of nonpoint source pollution as well as point source pollution is one of the important problems of water quality management, especially geological properties must be considered for sustainable development.

  • PDF

A Study on Flooding Characteristic Value for the Decision Method of an Urban Basin Design Magnitude (도시유역의 치수계획규모 결정을 위한 침수특성치에 관한 연구)

  • Ahn, Jeonghwan;Cho, Woncheol;Kim, Hosoung
    • Journal of Korea Water Resources Association
    • /
    • v.45 no.10
    • /
    • pp.1035-1041
    • /
    • 2012
  • This paper is on the decision of design magnitude for flood control of urban basin, based on flooding characteristic values. In Korea, a design magnitude for flood control is established based on peak discharge of the outlet of basin. However, this method is inappropriate in an urban basin because sewerage only can flow out as much as it could and other discharge overflow to basin. In order to calculate a design magnitude for flood control of an urban basin, flooding characteristic values (peak discharge of pipe, average flooded depth, maximum flooded depths of an important point, flooded area, flooded volume, flooded time) were used as a tool. Using the Gwanghwamun Square as an example, a methodology was proposed that used XP-SWMM 2010 model as a platform to predict urban flood disaster. It can help other local government and residents to better understand, prepare for and manage a flood in urban environments.

The Study on ATO of Urban Railway Considering Unknown Disturbance (미지의 외란을 고려한 도시철도차량의 ATO를 위한 연구)

  • Byun, Yeun-Sub;Han, Seong-Ho;Kim, Gil-Dong;Lee, Byung-Song;Han, Young-Jae;Baek, Jong-Hyen;Park, Hyun-Jun
    • Proceedings of the KIEE Conference
    • /
    • 1999.07a
    • /
    • pp.421-423
    • /
    • 1999
  • The function of the automatic train operation(ATO) system is to regulate the train ride comfort during start, acceleration and deceleration and execute operation of constant speed travelling and fixed point parking. The mathematical model for the train is presented by considering unknown disturbances which consist of start resistance, travelling resistance, slope resistance, curve resistance and so on. The speed control of ATO system is designed by considering the disturbances. The simulation is executed to verify the speed control performance and compare its performance with that of a PID-type ATO control system under the disturbances. Simulation results show that the control performance of gain scheduled control for ATO system is better than that of the conventional PID controller.

  • PDF

The Study of Monitoring System for Enhancement Electrical Point-machine Maintenance (전기선로전환기 유지보수 향상을 위한 모니터링 시스템의 연구)

  • Park, Jae-Young
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.10 no.11
    • /
    • pp.3115-3120
    • /
    • 2009
  • An electric point-machine which changes over a turnout so that it enables a train to be operated in the routine that a train is to proceed has been installed and used in most of the railways such as not only urban railways but also main-line railways. Most of the maintenance works in this electric point-machine is that the maintenance workers manually measure motor power, control power and display power in the site with the use of portable counters. Especially in case of NS or NS-AM electric point machine, the maintenance cycle is so frequent that during the operation casualty accidents caused by carelessness occurs as well as more staff is required for this measurement. In this paper we propose a system for monitoring the state of electric point machine installed in the site to improve maintenance efficiency and it is expected that this monitoring system confirms any measured values on electric point machines in real-time and improves maintenance efficiency.

Use of Importance-Performance Analysis to Evaluate Open Space Environment functions in Taejon City (중요도(重要度)-성취도(成就度) 분석(分析)에 의한 대전시(大田市) 녹지환경(綠地環境) 기능(機能) 평가(評價))

  • Song, Hyung Sop
    • Korean Journal of Agricultural Science
    • /
    • v.21 no.2
    • /
    • pp.92-102
    • /
    • 1994
  • This study examined Public Evaluation for functions of urban open space environment using a marketing strategy called Importance-Performance analysis. 12 main function attributes for urban open space environment were selected 150 respondents were sampled in Taejon city by personal interview. Ratings used mean values from a seven-point scale. Results were then graphically displayed on an easily interpreted two-dimensional 'Action Grid'. Generally Importance Ratings were high, but Performance Ratings were low relatively for various open space environment functions. In air pollution control function the difference was the most large. The results of rating scale analysis indicated repondents' sexual and residence period difference.

  • PDF

A study of SEMP for Urban Maglev Program (II) (도시형자기부상열차 SEMP 연구 (II))

  • Park, Seong-Whan;Kim, Dong-Sung;Back, Su-Hyun;Jung, Jin-Cheol;Cho, Hung-Je;Han, Suk-In
    • Proceedings of the KSR Conference
    • /
    • 2010.06a
    • /
    • pp.344-351
    • /
    • 2010
  • On last year's KSR conference, the general of systems engineering technology was introduced on the focus that the SEMP(Systems Engineering Management Plan) being applied for a national project of 'Urban Maglev Program'. Since this SEMP covers very wide work scopes of 'plan, application, control of the program', 'design, analysis, test & evaluation of the system', and 'special engineering activities', it is very important that the tasks and responsibilities of all participants of the project, involving the tasks to collaborate between them, are clearly defined and described. By the point, the updating of SEMP should be done continuously. In this paper, the updating points and typically the management plan of TPM (Technical Performance Measurement), which is more concretely defined, will be explained.

  • PDF