• Title/Summary/Keyword: U.J.S.

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A Study on the Selection of Lightning Arrester for DC Electric Traction Vehicles (전기철도용 피뢰기 선정에 관한 연구)

  • Kil, G.S.;Song, J.Y.;Kim, I.L.;Moon, S.B.;Han, J.S.
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.581-586
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    • 2006

  • Selection and application recommendations of lightning arresters for DC electric traction vehicles are presented. To decide arrester specification such as continuous operating voltage(COV, $U_c$), rated voltage($U_R$), and nominal discharge current($I_n$), variations of system voltage and surge currents flowing arresters were analyzed in running-service of traction vehicles. System voltages increased up to 1,800V during anti-breaking. Surge currents recorded 3 times per running-service-route and their magnitudes were ranges of $150A{\sim}2kA$. From the field measurement and consideration of EN50163, COV, $U_c$, and $U_R$ for the $1,500V_{DC}$ traction vehicles were proposed.

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Introduction to u-City Robot System Technology (u-City 로봇시스템기술 동향)

  • Yu, W.P.;Park, S.H.;Chae, H.S.;Lee, J.Y.
    • Electronics and Telecommunications Trends
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    • v.24 no.5
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    • pp.98-108
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    • 2009

  • u-City 로봇시스템기술은 u-City 환경에서의 IT 인프라를 적극적으로 활용하는 서비스로봇시스템기술을 지칭한다. IT 인프라와의 연계를 위해 전통적인 로봇주행기술은 이동성 지원 센서네트워킹, 로보틱 위치인식서비스 프레임워크, 광역공간 핸드오버지원 로봇주행, 네트워크기반 다중로봇 원격제어, 광역공간 매핑 등 IT 융합형 로봇기술로 발전하였다. 본 고에서는 u-City로봇시스템기술의 최근의 관련 연구현황, 각 구성요소, 그리고 실제 적용사례를 분석함으로써 향후 독자적인 서비스 산업으로의 성장가능성에 대해 살펴본다.

  • https://doi.org/10.22648/ETRI.2009.J.240510 인용 PDF

Mathematics of Chosun Dynasty and $Sh\grave{u}\;l\breve{i}\;j\bar{i}ng\;y\grave{u}n$ (數理精蘊) (조선(朝鮮) 산학(算學)과 수리정온(數理精蘊))

  • Hong Young-Hee
    • Journal for History of Mathematics
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    • v.19 no.2
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    • pp.25-46
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    • 2006

  • We investigate the process of western mathematics into Chosun and its influences. Its initial and middle stages are examined by Choi Suk Jung(崔錫鼎, $1645\sim1715$)'s Gu Su Ryak(九數略), Hong Jung Ha(洪正夏, $1684\sim?$)'s Gu Il Jib(九一集) and Hwang Yun Suk(黃胤錫, $1719\sim1791$)'s I Su Shin Pyun(理藪新編), Hong Dae Yong(洪大容, $1731\sim1781$)'s Ju Hae Su Yong(籌解需用), respectively. Western mathematics was transmitted for the study of the Shi xian li(時憲曆) when it was introduced in Chosun. We also analyze Su Ri Jung On Bo Hae(數理精蘊補解, 1730?) whose author studied $Sh\grave{u}\;l\breve{i}\;j\bar{i}ng\;y\grave{u}n$ most thoroughly, in particular for astronomy, and finally Lee Sang Hyuk(李尙爀, $1810\sim?$), Nam Byung Gil(南秉吉, $1820\sim1869$) who studied together structurally western mathematics.

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Control and Driving Characteristics of 6/6 Single-Phase SRM (6/6 단상 SRM의 제어 및 운전특성)

  • Son, I.J.;Oh, S.G.;Park, S.J.;Ahn, J.W.
    • Proceedings of the KIEE Conference
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    • 2001.10a
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    • pp.88-90
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    • 2001

  • This paper proposes a driving scheme for 6/6 single-phase SRM. The driving scheme is very simple and inexpensive. By use of this scheme, simple power devices based on low switching losses enable to high efficiency SRM drive. Starting, One of the main problem in single-phase SRM is overcome by a new starling algorithm with one hall sensor and a parting magnet. The proposed single-phase SRM has a high efficiency and robust drive characteristics compared to that of a universal motor.

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Coming To America: The Use of 28 U.S.C. § 1782

  • Robertson, Ann Ryan;Friedman, Scott L.
    • Journal of Arbitration Studies
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    • v.25 no.3
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    • pp.59-90
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    • 2015

  • Since 1855, the federal courts of the United States have been empowered to assist in the gathering of evidence for use before foreign tribunals. Today, the source of that authority is 28 U.S.C. ${\S}1782$ which permits the courts to order a person "to give [ ] testimony... or to produce a document ... for use in a proceeding in a foreign or international tribunal${\cdots}$ ." It was generally assumed, until the United States Supreme Court's decision of Intel Corp. v. Advanced Micro Devices, Inc. in 2004, that arbitration tribunals were not "foreign tribunals" for purposes of 28 U.S.C. ${\S}1782$. While the issue in Intel did not involve an arbitration tribunal, a statement by the Supreme Court in dicta has called into question the exact parameters of the words "foreign tribunal," resulting in a split of opinion among the federal courts of the United States. This article explores the legislative history of 28 U.S.C. ${\S}1782$, examines the United States Supreme Court decision in Intel, and discusses the split among the courts of the United States regarding the interpretation of "foreign tribunal." The article further surveys emerging issues: is an arbitration tribunal in a case involving foreign parties and seated in the United States a "foreign tribunal"; does agreeing to the use of the IBA Rules on the Taking of Evidence in International Arbitration circumscribe the use of 28 U.S.C. ${\S}1782$; can a party be ordered to produce documents located outside the United States; and is there a role for judicial estoppel in determining whether an application pursuant to 28 U.S.C. ${\S}1782$ should be granted?

  • https://doi.org/10.16998/jas.2015.25.3.59 인용 PDF