• Title/Summary/Keyword: utilities

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The Assessment of Wastewater Treatment and Management Using Performance Indicators and Cluster Analysis (수행능 지표(Performance Indicator)와 군집분석을 이용한 하수도시설 및 운영 평가)

  • Kim, Shin-Geol;Choi, Tae-Yong;Koo, Ja-Yong
    • Journal of Korean Society of Water and Wastewater
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    • v.21 no.2
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    • pp.165-175
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    • 2007
  • Performance indicators haven't been used for the assessment of the wastewater treatment facility or management in Korea yet, therefore they are going to be important parts in wastewater utilities because they are used to understand present situation and to compare one with other wastewater utilities. In this study, we used performance indicators to assess the condition of wastewater utilities and they were divided into four categories (A, B, C, and D). A category represented the condition of the planning & construction and composed of wastewater supply, disaster defence and employees. B category represented maintenance of wastewater utilities and were composed of manhole, sewer, and technical employees. C category showed the operation efficiency of wastewater utilities and D category represented the environmental load. To analyze the situation of wastewater utilities overall, cluster analysis was performed using four categori' es indicators. And CCC (Cubic Clustering Criterion) and R-square were used to decide the proper number of clusters, and wastewater utilities of 48 cities were divided into 5 groups(I, II, III, IV, and V groups). Each cluster was analyzed by average and standard deviation to understand the situation of wastewater utilities. A group analysis showed that IV and V clusters were insufficient, B group showed that I and IV groups were insufficient, C group showed all clusters are above average, and D group was also like C group.

A Research on the Safety Condition of Power Utilities Installed on Underground Premises (지하구내 수.변전설비 안전실태 조사)

  • Jung, Jong-Wook;Jung, Jin-Soo;Yi, Geon-Ho;Kim, Young-Seok;Bae, Seok-Myung
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.410-413
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    • 2006
  • This paper describes the safety condition of power utilities installed on underground premises when flooding occurs. As advance preparations, the statistical data were investigated based on the rainfall trend; the flooding damage; the power utilities installation; the electric shock accidents, and domestic md foreign regulations pertaining to the power utilities installation on underground premises were also compared and analyzed. After the preliminaries, the safety condition of underground power utilities was inspected at site and the results were reflected on considering countermeasures. Based on the further studies, the regulations closely related to the underground power utilities installation can be modified.

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Disinfection State and Effective Factors of Foodservice Facilities and Utilities of Elementary Schools in Busan -Based on the Characteristics of Dietitian, Employee and Foodservice- (부산지역 초등학교 급식시설,설비의 소독실태 및 영향요인 -영양사, 조리종사원 및 급식소 특성에 따른-)

  • Kim, Ji-Hyeon;Kim, Lee-Seon;Han, Ji-Suk
    • Journal of the Korean Dietetic Association
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    • v.10 no.1
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    • pp.34-46
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    • 2004
  • The purpose of this study was to investigate disinfection state and effective factors of foodservice facilities and utilities of elementary schools in Busan area. Foodservice facilities and utilities investigated in this study were ceiling, wall, floor, trench, greasetrap, hood, pest and dumb waiter. The questionnaire which was administered to 196 dietitians was used as a survey method. The results were as follows. The washing method of foodservice facilities and utilities was mainly used by detergent washing-natural dry. The disinfection method of foodservice facilities and utilities was mainly sanitized by sodium hypochlorite. Dumb waiter and hood were sanitized by 70% ethyl alcohol and iodine. In washing and disinfection frequencies of foodservice facilities and utilities ceiling was twice/year, wall, hood and pest control facilities were once/week, floor, trench, greasetrap and dumb waiter were everyday, respectively. Floor, trench, greasetrap and dumb waiter were disinfected properly, whereas ceiling, wall, hood and pest were not disinfected properly. The washing method was related to dietitian's marital status and education. The disinfection state was related to dietitian's age and career, having of sanitation check list. The disinfection method was also affected dietitian's marital status, number of employee, duration of foodservice, number of total serving and having of sanitation check list. Therefore based on the results of this study, it should be given to the microbiological study on disinfection of facilities and utilities such as ceiling, wall, floor, trench, greasetrap, hood, pest and dumb waiter and the dietitian and employee's sanitation training also should be conducted continuously.

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Developed Location Based Service System for Management of Underground Facilities' DB (지하시설물 DB의 유지관리를 위한 LBS 시스템 개발)

  • 이현직;황창섭;박기석;유지호
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • pp.325-333
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    • 2004
  • Since 1995, One of the NGIS(National Geographic Information System) projects, the underground utilities project has been finished in 2003. The 19 cities in korea for this project will use underground utilities management system using underground utilities database focusing on water and sewage system. However, special expert, technical and experience problem in computer environment has not been had in working department for water and sewage management and maintenance for each local government. The management and maintenance of underground utilities database by manual method is getting lowered a data quality of underground utilities database because of the data omitting, error in writing and securing of the lasted database. Therefore, in this study, Application test for field workers using a mobile tool and environment analysis of wireless communication in Korea and application test of GPS receiver for mobile tools had been processed and made a mobile working environment. The efficient management and maintenance method for underground utilities database has been developed an off- line method for modification and update of database about general work which has a high working frequency because of the limitation of wireless communication environment Also, the emergency working has been applied for on-line method.

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A Study on the Underground Utilities Data Base by UTIC System (UTIC System을 이용한 지하매설물 자료기반 구축에 관한 연구)

  • 이재기;최석근;이재동;이현직
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.13 no.2
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    • pp.135-140
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    • 1995
  • As the expansion of metropolis has been going, the role of underground utilities has importantly increased. The existed data is difficulty to acquire accurate data and computerize it. In the construction site, Particularly, the map of existed underground utilities has included so much inaccurate data. This study suggestes that making terrain map and surveying if the position of underground utilities are simultaneously done, also this method improves data accuracy and makes the computerized map such as CAD easy match the map of established underground map. The excution of this study collectes data by surveying of terrain and under ground utilities. Through new data collection, we can plot and acquire the position of real under ground utilities and attribute data about them.

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Development of 3D Underground Utilities Processing and Partial Update Automation Technology - Focused on 3D Underground Geospatial Map - (3차원 지하시설물 가공 및 부분갱신 자동화 기술개발 - 지하공간통합지도 중심으로 -)

  • LEE, Min-Kyu;CHOI, Sung-Sik;JEON, Heung-Soo;KIM, Sung-Su
    • Journal of the Korean Association of Geographic Information Studies
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    • v.23 no.4
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    • pp.1-15
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    • 2020
  • As cities expand and underground utilities construction projects increase, there is an urgent need for a technology capable of analyzing the underground utilities network in 3D. Since 2015, 3D Underground Geospatial Map project, that has been integrating 15 types of underground information such as underground utilities, underground structures, and ground information, is in progress in S. Korea. However, the construction of 3D underground facilities is currently based on manual work and the logic for building a 3D model is very complicated. And it takes a lot of time and cost to process millions of large amounts of data per local governments. By presenting a framework on the processing and partial updating of the 3D underground utilities model, this paper aims to establish a plan to quickly build a 3D underground utility model at a minimum cost. The underground utilities processing and partial update automation technologies developed in this study are expected to be immediately applied to the 3D Underground Geospatial Map project.

Development of Real-time Underground Utilities Management System using Real-time Kinematics Systems and 3D Game Engines (RTK 시스템과 3차원 게임엔진을 이용한 실시간 지하 매설물 관리 시스템 개발)

  • Kim, Sung-Ho
    • The Journal of the Korea Contents Association
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    • v.11 no.8
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    • pp.51-58
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    • 2011
  • This paper describes a development of system that enables the user to manage and display from 3D viewer after at real-time saves attribute informations in DBMS using RTK systems and 3D game engines. The 3-dimensional game engines for this system will be input a attribute values of underground utilities which is measured from RTK systems with wireless network. This system which sees does to make be a possibility of managing creation, elimination, modification for the underground utilities from 3-dimensional viewer. The coordinates about the underground utilities measures with GPS. The base reference point for RTK systems uses one in reference points which are measured in existing. GPS coordinates revised a reference point in standard. The 3-dimensional game engines are having the function which manages the underground utilities with 3-dimensions. The function is the same as wireless network of RTK systems, 3-dimensional display for terrain and underground utilities, input and registration for attribute of underground utilities, etc. The system which sees will be able to prevent the various accident which is caused by in the spatial location coordinate which underground utilities is inaccurate. And the system which sees is accurate is a possibility of managing and the application possibility is high very. Finally, this system could be applied very usefully from the point of view which starts a new town development.

Developement of Detection system of buried Underground Utilities using Magnetic Sensor (자기 센서를 이용한 지하 매설물 탐지 시스템 개발)

  • Cheon Y.S.;Lee J.Y.;Cho C.H.;Ahn K.T.;Yang S.Y.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.1819-1823
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    • 2005
  • Incorrect information on public sites can cause serious problem. One of relevant countermeasures against this problem is to detect of buried underground utilities in real time. Although there have been several method to detect of buried underground utilities, such as investigating of gravity and elastic wave and electric field, they have not been so efficient tools. Because it is too expensive and difficult to use. In this paper, magnetic sensors which could provide an easier and more efficient method are used to detect of buried underground utilities. Also fluxgate method of self detection are used. Input signal is used $1\~10kHz$ frequency. Filtering and signal processing of output signal are used labview software. After experiment, detection system of buried underground utilities which used magnetic shows possibility of precise detecting of laying object based on theorectical analysis for electromagnetic field.

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Utilities Market: The Sphere of Protection of Subjects

  • Dzhumageldiyeva, Gulnara;Zablodska, Inna;Yukhymenko-Nazaruk, Irina;Dovgaliuk, Vita;Suprunova, Irina;Gylka, Ulyana
    • International Journal of Computer Science & Network Security
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    • v.21 no.3
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    • pp.266-274
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    • 2021
  • The study covers three components of the facility for protecting public utilities market participants in the public utilities market: prevention of potential poverty, reduction of existing poverty and compensation to the injured party in a case of tort that exacerbates or threatens to exacerbate its poverty. The analysis is based on official statistical information on the activities of the public utilities sector. Operational information of public utility service providers regarding certain indicators of their activity in the work was not studied. This approach narrows the empirical basis of the study, but at the present stage in the context of different rates of implementation of changes in regions, sectors and at the level of individual entities, as well as lack of uniformity in the structure of indicators published by service providers, analysis allows to identify «bottlenecks» of legal regulation, which are systemic in nature and largely independent of the subjective factor.

Economic Analysis of Power Plant Utilities Under $CO_2$ Emission Tax (탄소세(炭素稅)를 고려한 화력발전 설비간의 경제성 평가)

  • Kim, Ji-Soo;Lee, Byoung-Nam;Kim, Tae-Jin
    • IE interfaces
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    • v.10 no.1
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    • pp.237-248
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    • 1997
  • The purpose of this study is to make an economic analysis of power plant utilities by examining electricity generating costs with environmental consideration. Economic growth has caused pollutant emission, and subsequent environmental pollution has been identified as a very real limit to sustainable development. Considering the enormous role of electricity in the national economy, it is thus very important to study the effect of environmental regulations on the electricity sector. Because power utilities need large investments during construction, operation and maintenance, and also require much construction lead time. Economic analysis is the very important process in the electric system expansion planning. In this study, the levelized generation cost method is used in comparing economic analysis of power plant utilities. Among the pollutants discharged of the electricity sector, this study principally deals with the control activities related only to $CO_2$, and $NO_2$, since the control cost of $SO_2$, and TSP (Total Suspended Particulates) is already included in the construction cost of utilities. The cost of electricity generation in a coal-fired power plant is compared with one in an LNG combined cycle power plant. Moreover this study surveys the sensitivity of fuel price, interest rate and carbon tax. In each case, this sensitivity can help to decide which utility is economically justified in the circumstance of environmental regulations.

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