• Title/Summary/Keyword: Construction Industries

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Status of the KSTAR Toroidal Field Coil Structure Fabrication

  • Choi, C.H.;Sa, J.W.;Park, H.K.;Hong, K.H.;Shin, H.;Kim, H.T.;Her, N.I.;Yang, H.L.;Kwak, J.H.;Moon, H.G.;Yoon, H.H.;Lee, S.K.;Song, J.Y.;Chu, Y.D.;Hur, D.K.;Nam, K.M.;Koo, B.H.;Lim, J.H.;Lee, J.K.;Kim, N.G.;Jang, S.W.;Kim, H.C.;Ha, E.T.;Bak, J.S.;Lee, G.S.
    • Proceedings of the Korean Nuclear Society Conference
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    • 2005.05a
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    • pp.1036-1037
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    • 2005

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Performance Test of 1MW class High-temperature Superconducting Motor for Industry Application (1MW 급 산업용 고온초전도 모터 특성 평가)

  • Baik, S.K.;Kwon, Y.K.;Kim, J.M.;Lee, J.D.;Lee, E.Y.;Kim, Y.C.;Moon, T.S.;Park, H.J.;Kwon, W.S.;Park, G.S.
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.142-143
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    • 2007

  • A 1MW class HTS(High-Temperature Superconducting) synchronous motor has been developed. This motor is aimed to be utilized for industrial application such as large motors operating in large plants. The HTS field coil of the developed motor is cooled by way of Neon thermosiphon mechanism and the stator coil is cooled by water through hollow copper conductor. This paper describes performance test results of our motor, which was conducted at steady state in generator mode and motor mode.

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Effects of Length of Down Conductor on Transient Ground Impedance (인하도선 길이에 따른 과도접지임피던스 특성)

  • Lee, B.H.;Jeong, D.C.;Lee, S.B.;Lee, T.H.;Jung, H.U.;Lee, K.S.;Lee, S.C.
    • Proceedings of the KIEE Conference
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    • 2005.07c
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    • pp.2235-2237
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    • 2005

  • This paper presents the transient impedance behaviors of grounding systems to lightning impulse current. The potential rise and effective impulse ground impedance of the test grounding electrodes were measured as a function of the rise time of impulse currents and lengths of down conductor. The transient ground impedances strongly depend on the configuration and size of grounding electrodes, the impulse current shapes and lengths of down conductor, and the inductance of reduce of grounding electrode inductance is an important factor to improve the transient ground impedance.

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Forecasting and Evaluation of the Accident Rate and Fatal Accident in the Construction Industries (건설업에서 재해율과 업무상 사고 사망의 예측 및 평가)

  • Kang, Young-Sig
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.40 no.1
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    • pp.87-94
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    • 2017

  • Many industrial accidents have occurred continuously in the manufacturing industries, construction industries, and service industries of Korea. Fatal accidents have occurred most frequently in the construction industries of Korea. Especially, the trend analysis of the accident rate and fatal accident rate is very important in order to prevent industrial accidents in the construction industries systematically. This paper considers forecasting of the accident rate and fatal accident rate with static and dynamic time series analysis methods in the construction industries. Therefore, this paper describes the optimal accident rate and fatal accident rate by minimization of the sum of square errors (SSE) among regression analysis method (RAM), exponential smoothing method (ESM), double exponential smoothing method (DESM), auto-regressive integrated moving average (ARIMA) model, proposed analytic function model (PAFM), and kalman filtering model (KFM) with existing accident data in construction industries. In this paper, microsoft foundation class (MFC) soft of Visual Studio 2008 was used to predict the accident rate and fatal accident rate. Zero Accident Program developed in this paper is defined as the predicted accident rate and fatal accident rate, the zero accident target time, and the zero accident time based on the achievement probability calculated rationally and practically. The minimum value for minimizing SSE in the construction industries was found in 0.1666 and 1.4579 in the accident rate and fatal accident rate, respectively. Accordingly, RAM and ARIMA model are ideally applied in the accident rate and fatal accident rate, respectively. Finally, the trend analysis of this paper provides decisive information in order to prevent industrial accidents in construction industries very systematically.

  • https://doi.org/10.11627/jkise.2017.40.1.087 인용 PDF KSCI