• 제목/요약/키워드: ANSI

검색결과 384건 처리시간 0.027초

사례연구를 통한 경제적 접지설계 검토 (Economized Grounding System Design Based Upon Case Study)

  • 김양수;심용식;최대원;김태훈;이정은
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 춘계학술대회 논문집 전기설비전문위원
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    • pp.31-33
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    • 2008
  • 본 논문에서는 국내 접지설계 환경의 적정성 여부를 검토하여 ANSI/IEEE Std.80-2000을 보완한 새로운 접지시스템 설계방법을 이용하여 접지설계를 검토하였으며, ANSI/IEEE Std. 80-2000 Annex B의 사례연구를 통해 기존방식과 비교 검토하여 신뢰성과 경제성을 검증하였다.

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정규화 시험장감쇠량의 모멘트 법 해석 (Analysis of the Normalized Site Attenuation Using the Moment Method)

  • Ki Chai Kim
    • 전자공학회논문지A
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    • 제30A권11호
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    • pp.48-57
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    • 1993
  • The ANSI recently adopted normalized site attenuation(NSA) as a validation procedure of open area test sites. In this paper, the theoretical NSA values specified in the truth vlues of NSA were calculated for an ideal test site when tuned dipoles are used. A method of moments technique is employed to evaluate these NSA values. The calculated NSA values are more accurate than that of the ANSI.

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User Identity Module(UIM) for IMT-2000 systems

  • Chung, Bo-Hyun;Koh, Jong-Seog
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2000년도 추계학술발표논문집 (하)
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    • pp.1141-1144
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    • 2000
  • User Identity Module(UIM) is widely deployed in GSM(Global System for Mobile communications), Known as SIM(Subscriber Identity Module). We can expect that UIM will be also available for ANSI based third generation systems. Removable User Identity Module(R-UIM) is UIM for ANSI based third generation systems and Universal Subscriber Identity Module(USIM) is UIM for GSM based third generation systems. This paper identifies differences between R-UIM and USIM and studies global roaming in IMT-2000 systems.

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LAN 접속기준 동향분석 (Physical Layer Specifications in LAN)

  • 김영태;구본희
    • 전자통신동향분석
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    • 제9권2호
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    • pp.55-65
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    • 1994
  • 최근 가입자 구내의 정보 전달을 위한 LAN 접속장치들의 다양함과 대량생산으로 이에 대한 LAN 접속기준의 제정이 시급한 문제로 대두됨에 따라, LAN 기준에 대한 모범이라고 할 수 있는 ANSI/IEEE 802.3 및 ANSI X3.166의 규정중에서 시장성이 높은 10 Base T, 10 Base 2, 10 Base 5, AUI, FOIRL 및 FDDI 인터페이스 기준을 분석하여 향후 국내의 LAN 접속기준 제정시 활용하고자 한다.

미국표준연구원 체크리스트 Z-365의 자가보고형 설문개발 및 타당도 평가 (Development of Self Administered Questionnaire and Validity Evaluation for American National Standards Z-365 Checklist)

  • 박경식;강동묵;이용환;우지훈;신용철
    • 한국산업보건학회지
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    • 제16권2호
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    • pp.172-182
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    • 2006
  • Self administered checklist is needed to be developed to evaluate ergonomic risk factors. This study was conducted to develop self administered form of American National Standards Institute (ANSI) Z-365 checklist which represents comprehensive ergonomic risk factors, and to evaluate validity of this checklist. This study had been conducted from May 2004 to July 2005, of which subjects were 147 workers from 4 workplaces. Response rates for every items of self administered form of ANSI Z-365 were evaluated. To estimate the validity of checklist, relationship between the checklist grade that ANSI recommended and work-related musculoskeletal disorders (WMSDs) symptom were calculated with and without adjustment of related variables. To evaluate the utility of checklist, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated. Because response rates of almost items were over 90 %, item development was successful. Because the checklist was related with WMSDs symptom after adjusting related variables, the checklist might represents ergonomic risk well. Because of low sensitivity and NPV, high specificity and PPV, the checklist is not suitable for screening tool. The checklist has better relationship with more severe symptom. Because of high specificity of the checklist, using it with high sensitive tool would enhance it's utility. Further study to develop high sensitive and comprehensive self administered ergonomic checklist is needed.