• Title/Summary/Keyword: Out of distribution

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Analysis of Lightning Surge in the Underground Distribution Systems (지중배전계통에서 뇌서지특성 해석)

  • Lim, Kwang-Sik;Lee, Jong-Beom
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.1253-1254
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    • 2006
  • This paper aims to analyze the overvoltage in underground distribution systems when lightning surge strikes to overhead line. The model is established by EMTP/ATPDraw for actual distribution systems. Simulation is carried out considering variation of parameters such as length and lightning current.

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Study on Dangerous Cut-slopes Distribution Using Inventory Data in Chungcheongdo (절토사면 현황자료를 이용한 충청도 관내 위험절토사면 분포 연구)

  • Kim, Jin-Hwan;Koo, Ho-Bon;Rhee, Jong-Hyun;Yun, Chun-Joo
    • Proceedings of the Korean Geotechical Society Conference
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    • 2008.03a
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    • pp.858-862
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    • 2008
  • KICT has been carrying out inventory research on the cut slopes of national roads. Inventory research results are basic data used in cut slope management system. Inventory data are classified by general status, cut slope characteristics and inspector opinion. Cut slope inventory data are utilized to figure out dangerous slopes and decide survey ranking of detailed safety diagnostication. This paper drew the distribution of dangerous cut slopes using inventory data in Chungcheongdo, then verified an efficiency on distribution of dangerous cut slopes by comparing occurrence frequency of real collapsed cut slopes.

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UPFC Performance Control in Distribution Networks for DG Sources in the Islanding

  • Fandawi, Ahmed;Nazarpour, Daryoosh
    • Transactions on Electrical and Electronic Materials
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    • v.18 no.5
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    • pp.303-309
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    • 2017
  • The flexible AC transmission system (FACTS) provides a new advanced technology solution to improve the flexibility, controllability, and stability of a power system. The unified power flow controller (UPFC) is outstanding for regulating power flow in the FACTS; it can control the real power, reactive power, and node voltage of distribution networks. This paper investigates the performance of the UPFC for power flow control with a series of step changes in rapid succession in a power system steady state and the response of the UPFC to distribution network faults and islanding mode. Simulation was carried out using the MATLAB's simulink sim power systems toolbox. The results, which were carried out on a 5-bus test system and a 4-bus multi-machine electric power system, show clearly the effectiveness and viability of UPFC in rapid response and independent control of the real and reactive power flows and oscillation damping [6].

The Influence of Super-Centers' Social Responsibility Activities and Authenticity On Consumer Attitude and Purchase Intention

  • Cho, Hee-Young;Ju, Yoon-Hwang
    • Journal of Distribution Science
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    • v.13 no.2
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    • pp.35-44
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    • 2015
  • Purpose - In this study, corporate social responsibility activities as perceived by customers visiting super-centers and the influence of the authenticity of such social responsibility activities on trust have been examined while attempting to verify how trust would influence consumers' attitude and purchase intention. Research design, data, and methodology - For data collection, a questionnaire survey has been conducted on 200 consumers who would visit super-centers, and 161 effective samples have been used for the final analysis. Methodologies such as Cronbach's α, factor analysis, correlation analysis, and structural equation modeling were used. Results - Among corporate social responsibility activities, legal responsibility in particular has turned out to influence consumers rather greatly. Thus, law observance has turned out to be a necessity rather than merely an economic or ethical responsibility; as for trust, trust in the product has turned out to exert more influence on consumers than trust in the enterprise. Conclusions - Corporate social responsibility activities can mean that the complete fulfillment of natural and proper corporate responsibility will secure consumer trust, thus influencing consumer attitude and purchase intention positively.

Suggested Temperature Monitoring System for Distribution Transformers by Using Microcontroller Scheme

  • El-Gawad, Amal F. Abd
    • Journal of Electrical Engineering and Technology
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    • v.10 no.5
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    • pp.2099-2104
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    • 2015
  • The paper presents a monitoring system for the cooling of distribution transformers. The suggested system is controlled by a microcontroller scheme. The system is designed to control the oil temperature. It gives a solution to improve the cooling system by adding a number of fans especially for indoor transformers that are placed in badly-ventilated rooms. Also, the paper includes an alarm system with the possibility of tripping the transformer if it is necessary. The monitoring system consists of acquisition temperature sensor, and on-site unit. The hardware and software of the on-site unit are demonstrated with sufficient illustrations. Small prototype is constructed in the laboratory. Some laboratory experiments are carried out for examining the designed circuit by using Proteus Virtual System Modeling as well as for testing the prototype monitoring system. Concerning this research point, a study is carried out to evaluate the economic feasibility. The results are recorded and associated with many recommendations that may be valuable to electrical distribution (utility) companies.

Distribution Strategies for Service Delivery: Focus on Verbal and Non-verbal Communication at Counter Service Restaurants

  • CHOI, Jinkyung
    • Journal of Distribution Science
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    • v.20 no.3
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    • pp.45-52
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    • 2022
  • Purpose: This study investigated the impact of staff verbal and non-verbal communication on consumer satisfaction and revisit intention. The study sought to identify differences in demographic and eating out characteristics on perceived verbal and non-verbal communication. Research design and methodology: This study used a survey method to collect data. The questionnaire asked about previous experience with verbal and non-verbal communication with staff at a counter service restaurant. The study measured degrees of perceived verbal and non-verbal communication. In addition, the effect of verbal and non-verbal communication on satisfaction and revisit intention was measured. The principal results: Results of ANOVA showed significant differences in monthly income on verbal communication and monthly income and budget for dining out on verbal and non-verbal communication. Both verbal and non-verbal communication affected satisfaction and revisit intention significantly with slightly more power of verbal communication than non-verbal communication. Major conclusions: Results of this study suggest that consumers are affected by both verbal and non-verbal communication. Staff communication is critical to increasing consumer satisfaction and revisit intention; hence, training staff in effective communication is necessary.

Load Flow Algorithm Analysis of Distribution System (배전계통 부하조류계산 알고리즘 비교 분석)

  • Kwak, Do-Il;Kim, Tae-Eung;Ryu, Jae-Hong;Kim, Jae-Eon
    • Proceedings of the KIEE Conference
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    • 1999.11b
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    • pp.134-136
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    • 1999
  • Not much work has been carried out on the load flow analysis of distribution networks. This paper introduces Newton-Raphson method using Distflow equation and Forward Sweeping method in the distribution networks. And that efficient solution scheme in a radial distribution network is presented. Also, simulation results of both Newton-Raphson method and Forward Sweeping method applied to a 22.9kV distribution system model with 120 load buses are analized and evaluated.

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Comparison of the Blood Lipid , Insulin and Nutrients Intake by Fat Distribution of Obese Male in Korea (비만 남자 대학생의 비만 유형에 따른 혈중 지질, 인슐린 농도 및 영양소섭취량 비교 연구)

  • 김순경
    • Journal of Nutrition and Health
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    • v.31 no.1
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    • pp.72-79
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    • 1998
  • This study was intended to figure out the difference of the blood lipids, insulin and nutrients intake by fat distribution among the obese young male in Korean. Twenty-eight male college students participated in this study, whose to find out body fat distributions were classified on the basis of Waist /hip ratio (WHR) into three groups-upper body type (UBTM), intermediate body type(IBTM) and lower body type (LBTM). To conduct this study, anthropometric measurements , blood pressure, serum lipids and insulin levels, and daily nutrients intake were analized . The results are as follows : The three body type groups showed significant differences each other in waist circumference(p<0.05), WTR(p<0.001) and body fat percentage (p<0.05). Also they showed significant difference each other in the daily construction in the daily energy intake. But they did not show significant differences in the blood pressure, serum lipids and insulin levels. From the above results, we could concluded that the body fat distribution in obese the young men could affect nutrients intake pattern.

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Clinical Study on Frequency of Additional Effect of Ring Moxibustion with Sasang Constitution Distribution (중완.기해혈의 링뜸 시술시 나타나는 명현반응의 빈도 및 체질과의 연관성에 대한 연구)

  • Park, Hyun-Ae;Lee, Jae-Min;Lee, Chang-Hee;Lee, Chul-Hwi;Cho, In-Young;Lee, Sung-No;Shin, Jung-Mi
    • Journal of Acupuncture Research
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    • v.26 no.6
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    • pp.11-19
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    • 2009
  • Objectives : This study is designed to find out if Sasang Constitution distribution is related to the additional effect occurance of Ring Moxibustion treatment. Methods : We choosed 59 case of 'deficient of Qi' patient from 300 using VEGA-D-F-M, then investgated for the additional effect of Ring Moxibustion treatment, to find out tendency with Sasang Constitution distribution. Results : 1. the additional effect was in 2 case of patient, redness and itching sign. Other was not observed. Occurance of Ring Moxibustion treatment is not related to Sasang Constitution distribution. 2. The 'deficient of Qi' case were numerous in Soin(少陰) Constitution then other, about half. Conclusions : This study shows that side effect of Ring Moxibustion treatment is not related to Sasang Constitution distribution.

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Goodness of Fit and Independence Tests for Major 8 Companies of Korean Stock Market (한국 주식시장 상위 8개사에 대한 적합도 검정 및 독립성 검정)

  • Min, Seungsik
    • The Korean Journal of Applied Statistics
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    • v.28 no.6
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    • pp.1245-1255
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    • 2015
  • In this paper, we investigated the major 8 companies of Korean stock market, and carried out the goodness of fit and independence tests. We found out the distributions of absolute returns are closed to compressed exponential distribution. The parameters are dominant that 1 < ${\beta}$ < 2, followed by ${\beta}=1$(exponential distribution) and ${\beta}=2$(normal distribution). Meanwhile, we assured that most of the absolute returns for major 8 companies have relevance to each other by chi-square independence test.