• Title, Summary, Keyword: Field Works

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A Study on the Hazard Factor and Safety Management at Transmission Line During Live Line Works (송전선로 직접활선공법의 위험요인과 안전대책에 관한 연구)

  • Choi, Seung-Dong;Kang, Kyong-Sik
    • Journal of the Korea Safety Management & Science
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    • v.8 no.3
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    • pp.51-66
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    • 2006
  • This study was attempted to analyze risk factors and suggest accident prevention in live line works for power transmission lines to be developed and applied in Korea. Safety problem cannot but occur at development of live line works and application to the field. With respect to this, problems likely to occur in the field among works adopting methods of works including live line works for power transmission lines were investigated and analyzed through documentary survey and risk assessment method. The results are summarized as follows. A risk assessment method model was suggested. This method enables scientific and systematic development of safety control. That is, the owner may autonomously induce safety control and build risk assessment database by work process to use them as best training data for workers. Also, in the field, it may induce all workers to participate in safety program and secure safety by making workers seek for safety working method under smooth flow from looking at risk factors to accident prevention activities. It is deemed that this humble study will prevent both accident and injury likely to occur in live line works for power transmission lines.

MAGNETIC PROPERTIES OF FERRITE CORES UNDER DC-BIASED FIELD

  • Fukunaga, H.;Masumoto, S.;Ohta, Y.;Kakehashi, H.;Ogasawara, H.
    • Journal of the Korean Magnetics Society
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    • v.5 no.5
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    • pp.606-609
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    • 1995
  • Ferrite cores are often magnetized under DC-biased field because they have been intensively used in electronic circuits such as an inverter circuit and a switching regulator circuit. Thus we investigated the effects of DC-biased field on magnetic properties in the frequency range of DC-100kHz for two kinds of ferrite cores, TDK PC38 and TDK $H_{3}S$, which have different shapes of B-H loop from each other. The magnetic loss per cycle, W/f, in the $H_{3}S$ core decreased with increasing the strength of DC-biased field, although W/f in the PC38 core increased monotonically with DC-biased field. The observed decreasing tendency differs from the previous result for Si-Fe and ferrite cores, and can be attributed to decrease in eddy current loss as well as that in hysteresis loss.

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A Thought on the Fire Fighting Official Selection Examination (소방공무원 채용시험에 관한 소고)

  • Hyun Seong-Ho;Song Yun-Suk;Lee Chang-Woo
    • Fire Science and Engineering
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    • v.19 no.4
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    • pp.80-86
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    • 2005
  • Fire fighting officials perform their works in the field and in most cases, undergo circular appointments for their service period. If they don't gain experience in field works, they have difficulty in performing faithful planning or administrative works. So they surely have to gain experiences in field works. Like this, fire fighting officials' works comprise a lot of fields, comparing with other job workers. So they need a strict body condition. The aim of this inquiry is to scrutinize body standards and important roles concretely which are necessary to fire fighting officials, to analyze written examination, physical test, physical strength test, and interview examination, and to establish the proposal which is necessary to improvement.

Development of Construction Project Management System Applicable to Earth-Work Field (토공 현장관리 중심의 시공관리시스템 개발에 관한 연구)

  • Kwon, Oh-Yong;Jo, Jae-Ik;Kim, Do-Keun
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • pp.301-304
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    • 2008
  • The purpose of this study is to embody the integrated working management system for public works, focused on the management of surplus soil at a field of public works. The contents and results of this study can be classified into the design of working management DB for public works and the embodiment of working management DB. First, the design of working management DB for public works consists of three DBs - process management to analyze work plan and performance. for backhoe loader, working management and resources management for equipment and labor management - in connection with work and resources classification system. Secondly, the working management system for public works can describe work plan and performance on a floor plan using graphic. Based on this, the status of process and progress report with visual expression had been developed to facilitate the communications and performance of duties among staff in charge at the field of public works. This study is a specialized system for a company specializing in public works and a system that can be put into practical use if practicality is proved through test-bed with regard to business.

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The Field Operation and Policies of Repair Works for Architectural Treasures in Late Japanese Colonial era based on Repair Works of Hwaumsa Kakhwangjeon (화엄사 각황전 수리공사를 통해 본 「보존령」 제정 이후 일제강점기 보물 건조물 수리공사의 현장운영과 수리방침)

  • Seo, Hyo-Won;Jeon, Bong-Hee
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.34 no.1
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    • pp.41-52
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    • 2018
  • The purpose of this study is to examine the circumstances of repair works after enacting "Low for Conservation of Joseon Treasure, Historic Site, Scenic Beauty & Natural Monument (朝鮮寶物古跡名勝天然記念物保存令)". For this purpose, the official documents produced by the Government-general Museum of Joseon were analyzed. They included the contents of repair works of Hwaumsa Kakhwangjeon(華嚴寺 覺皇 殿). As a result, this study reveals that the repair work of Hwaumsa Kakhwangjeon had become a momentum of introducing specific guidelines such as "Guidelines for Architectural Treasure's Repair 寶物建造物修理施行準則", "Regulations for administration of Hwaumsa Kakhwangjeon's repair work 華嚴寺覺皇殿修理工事取扱手續)". The guidelines and regulations systematized the planning phase of the repair works and provided to organize the field office formed by experts. In spite of these positive changes, the repair works were controlled by the central government to the certain extent, and the Japanese repair techniques were mingled with traditional techniques recklessly.

Study on the Maintenance and Management using DB Program of Inspection Data for Tunnel (터널의 진단자료 DB화에 의한 유지관리 연구)

  • Lee, Song;Shim, Min-Bo
    • Proceedings of the KSR Conference
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    • pp.503-510
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    • 2000
  • Recently, many kinds of research has been actively developing for a standardization and information related to the construction works. These works include the general field of design, construction, supervision, maintenance and management on facilities. The works of database construction for a standardization and information were chiefly propelled centering around the present conditions related to the design, construction work. The field related to maintenance and management on facilities lags behind in the works of database construction. The establishment of standard classification system(SCS) on facilities and inspection data is most important among the things related to maintenance and management to have a efficiently maintenance and management. This paper suggests SCS on facilities and inspection data according to that of facilities. On the basis of SCS of facilities and inspection data, code work with classification system and input work for a data of maintenance and management was practised. The purpose of this paper is to suggest a kind of statistics data and investigate a characteristics of inspection using statistic data on tunnel structures

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Deduction of inspection and maintenance system for traction motor of electronic locomotive (전동차의 견인전동기 상태진단 및 유지보수 체계 개선안 도출)

  • Lee, Sang-Soo;Kim, Min-Pyo;Kwak, Sang-Log;Cho, Yun-Ok
    • Proceedings of the KSR Conference
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    • pp.706-712
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    • 2006
  • The present volume should address the unique method of deterioration analysis tailorly applicable to the study of traction motor, not existent maintenance works system with the time period standard, such as regular inspection works, maintenance works, selection for the repair works. The present volume has executed various field experiments in this method, should propose the procedures and baselines for anticipating the life expansion of traction motor and building precautional maintenance system for it, on the basis of these field experiments. The improvement scheme of traction motor maintenance system in the present volume should be to keep the out-of-order rate from unexpectedly soaring and make the cost-reduction effect through better maintenance work method.

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A Study on Fashion Design Applied from Color-Field Abstract of Matk Rothko: Focusing on Needle-Punching Felt Technique

  • Park, Kyung-Mi;Lee, Mi-Ryang
    • The International Journal of Costume Culture
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    • v.13 no.2
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    • pp.141-153
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    • 2010
  • Fashion needs to be understood as practicality and creative behavior and various movements of paintings act as inspirations of original design for fashion designers. This study seeks to find sources of fashion designs in the works of Mark Rothko who is in the center of color-field abstract. Color-field of Rothko provides infinite inspirations as colors are identically treated as shapes and lighting and textures are all included on top of it. In this study, the purpose is to create color focused artistic fashion design by exploring the possibility of expression with the colors of Rothko as the main motive. The study method is as follows. First, the concept and significance of color-field abstract are researched through documented data. Works of Rothko is divided into three periods according to their characteristics. The background of the formation of color-field abstract of Rothko is understood by analyzing the trends of the works in each period. Second, twenty representative works from 1949 to 1969 are selected and analyzed in formative components of color, shape and textures in order to more accurately understand shape of colors, brilliance, simplicity that appear in the mature color-field abstract of Rothko. Third, preexisting methods of color-field of paintings developed into motives of clothing are studied focusing on the collections from 1997 to 2006. Examples of applications of color-field images in modern fashion designs are analyzed. Fourth, motives are selected based on general characteristics of color-field abstract of Rothko and the results of the formative analysis. Clothing is produced that expresses the colors of the paintings of Rothko more effectively. As the results of the study, restrained shapes and textures and various forms of color combinations shown in color-field abstract of Rothko provided deep inspirations on material composition and color planning for fashion design focused on colors. Additionally, needle-punching technique using wool for the production technique enabled relief texture expressions of materials by colors and effective applications of soft and warm atmosphere of color-field abstract of Rothko on clothing. Especially, the ideology of color-field abstract of Rothko of shaping of colors could be expressed and the direction of the development of motives could be presented at the same time by specifically applying color combination method using horizontal division of atypical color-field from the formative characteristics of color-field abstract of Rothko.

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The 3rd National Conference Of Professional engineers - Outline of U-City (제3회 전국기술사대회 특집(3차분) - U-City 개요 - 건축전기설비 -)

  • Youn, Gill-Jae
    • Journal of the Korean Professional Engineers Association
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    • v.42 no.6
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    • pp.28-30
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    • 2009
  • There is a proverb in Korea "Don't chase after another." It can be a right proverb in sometimes. However, usually it doesn't fit in these various society, information knowledge society. Modern society requires convergence technology. IBS (Intelligent Building System) requires knowledge of architecture field, electric field, communication field, and computation field. ITS (Intelligent Transport Systems) which is constructing in many cities requires various knowledge as engineering works, electricity, computation, communication and transportation. In the case of u-City, it requires technology of many fields as architecture, electricity, communication, engineering works, transportation, and computation. Anyone who wants to participate in u-City should study and acquire knowledge in various field. Otherwise, it must be failed because of lack of communication like as the Tower of Babel. U-City is not a portion of one field. Therefore, engineers in many fields should cooperate with each other to make u-city as the best product in the world.

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Web based control modules Using LonWorks/Ethernet Server for Control a large Scale Renewable Energy System in Building (빌딩용 신.재생에너지시스템 제어를 위한 LonWorks기반 원격 제어모듈 개발)

  • Hong, Wonl-Pyo
    • Proceedings of the KIEE Conference
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    • pp.1706-1711
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    • 2008
  • This paper proposes a new Web based-control concept & design method and implementation of LonWorks network system for a large scale renewable energy energy control and monitoring system in building. The Experimental LonWorks network system using LonWorks/Ethernet(Web) server is designed and fabricated. This article addresses issues in architecture of LonWorks/Ethernet sever, embedded processors architecture for converting LonTalks protocol to Modbus protocol and software, and Internet technologies. It is also verified that the multi-induction motor control and monitoring system using LonWorks/Ethernet server have available, interoperable, reliable performance characteristics from the experimental results, Especially, The seamless integration of TCP/IP networks with control networks allows access to any control point from anywhere. Thus, the results provide a available technical data for remote distributed control system of industrial and buildings field.

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