• 제목/요약/키워드: extremely

검색결과 6,372건 처리시간 0.029초

Testicular torsion in the inguinal region in an extremely low birth weight infant

  • Jung, Yu-Jin;Chung, Jae-Min
    • Clinical and Experimental Pediatrics
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    • 제53권9호
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    • pp.852-854
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    • 2010
  • Testicular torsion is rare in newborn infants. However, its frequency has increased, most of which are reported in full-term infants. We diagnosed and treated testicular torsion in an extremely low birth weight infant (ELBWI). A $2{\times}2cm$ red mass was palpable in the left groin of a 24-week-old, 745 g, male newborn at 23 days of age. Left testicular torsion was diagnosed, and emergent orchiopexy was performed. Careful physical examination is needed in cases suspicious of testicular torsion in ELBWIs with cryptorchidism. Moreover, early diagnosis and emergent exploration are necessary to prevent complications such as the risk of anorchia.

나노 인덴터용 미소 추력 보이스코일 모터의 최적 설계 (Optimal Design of Extremely Small Thrust VCM for Nanoindenter)

  • 조주희;이진우;이철규;권병일
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제53권2호
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    • pp.69-75
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    • 2004
  • In this paper, we propose the shape of extremely small thrust VCM for application of the Nanoindenter, which enables control of very small force and displacement. We performed optimization of the VCM shape using conjugated gradient method. And the purposes of optimization are the minimization of the permanent magnet size for the efficient systems, minimization of deviation of flux density from the air gap for operate on regular thrust and a linearization of thrust for a good control characteristic. The finite element method is used for characteristic analysis. The node moving method is used to redundant changes of design variables. As a result, the VCM produces a yew small force by the difference of flux density of lower part from higher one. Also, in a wide range of current (0[A]-1[A]), the VCM produces linear driving thrust by saturating the magnetic circuit path and operate on regular thrust by minimizing deviation of flux density of the air gap.

고온 동작용 SiC CMOS 소자/공정 및 집적회로 기술동향 (Technology Trend of SiC CMOS Device/Process and Integrated Circuit for Extreme High-Temperature Applications)

  • 원종일;정동윤;조두형;장현규;박건식;김상기;박종문
    • 전자통신동향분석
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    • 제33권6호
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    • pp.1-11
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    • 2018
  • Several industrial applications such as space exploration, aerospace, automotive, the downhole oil and gas industry, and geothermal power plants require specific electronic systems under extremely high temperatures. For the majority of such applications, silicon-based technologies (bulk silicon, silicon-on-insulator) are limited by their maximum operating temperature. Silicon carbide (SiC) has been recognized as one of the prime candidates for providing the desired semiconductor in extremely high-temperature applications. In addition, it has become particularly interesting owing to a Si-compatible process technology for dedicated devices and integrated circuits. This paper briefly introduces a variety of SiC-based integrated circuits for use under extremely high temperatures and covers the technology trend of SiC CMOS devices and processes including the useful implementation of SiC ICs.

Transversal wideband bandpass filter with a wide stopband and multiple transmission zeros

  • Wang, Li-Tian;Xiong, Yang;Wang, Zhi-Peng;Gong, Li
    • ETRI Journal
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    • 제43권1호
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    • pp.133-140
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    • 2021
  • Herein, we present a compact transversal bandpass filter (BPF) with an extremely wide upper stopband and multiple transmission zeros (TZ). Three signal transmission paths with shorted stubs and open-coupled lines allow signal transmission from input port to output port. Two resonant modes can be excited simultaneously and managed easily for bandpass response. Eleven TZs are achieved via transmission path cancelation; an extremely wide upper stopband with an attenuation level better than -12 dB is achieved up to 11.7 f0, where f0 is the center frequency (CF). In addition, bandwidth and CF can be controlled by adjusting electrical lengths. For proof of concept, a wideband BPF centered at 1.04 GHz with 3 dB fractional bandwidths of 49.2% was designed, fabricated, and evaluated. The overall circuit measures 0.045λg × 0.117λg; good agreement was observed between the measured and simulated results.

Management of human bite injury of the upper and lower eyelids: a rare case report

  • Richardson, Sunil;Sharma, Kapil;Khandeparker, Rakshit Vijay Sinai
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • 제42권6호
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    • pp.375-378
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    • 2016
  • Human bite injury to the eyelid is extremely rare and poses a significant challenge in surgical reconstruction. We report an extremely rare case of human bite injury to the eyelid in a 43-year-old male with approximately 60% full thickness loss of the upper eyelid and 80% to 90% full thickness loss of the lower eyelid and its successful reconstruction using the local advancement cheek flap.

위상최적설계기법을 이용한 초경량 트레일러 연구 (A study on the extremely light trailer frame using topology optimization technique)

  • 윤민수;장강원;박재하
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2008년도 추계학술대회A
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    • pp.410-411
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    • 2008
  • A topology optimization technique to develop extremely light trailer frame structure is performed due to the strong needs of the customers and makers owing to high level of oil price. First, the overall layout of the frame is derived using topology optimization and then, final specification is also derived utilizing DOE optimization technique for mass product.

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THE EFFECT OF EXTREMELY LOW FREQUENCY MAGNETIC FIELD (ELF-MF) ON THE FREQUENCY OF MICRONUCLEI IN HUMAN LYMPHOCYTES INDUCED BY BENZO(A)PYRENE

  • Cho, Yoon-Hee;Kim, Su-Young;Chung, Hai-Won
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
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    • pp.178-178
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    • 2001
  • The interaction of extremely low frequency magnetic field (ELF-MF) on the frequency of micronuclei (MN) induced by benzo(a)pyrene (BP) in human lymphocytes was examined. A 60 Hz ELF-MF of 0.8 mT field strength was applied for 24 hours either alone or with the tumour initiator, BP. The frequency of MN induced by BP increased in a dose-dependent manner.(omitted)

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다품종 극소량생산시 표준시간자료의 산정방법 및 적용사례 (An Estimation Method of Standard Time Data and a Case Study in Multi-Item Extremely Small Quantity Production)

  • 심창건;변재현
    • 산업공학
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    • 제11권2호
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    • pp.191-197
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    • 1998
  • Having a reliable standard time data is very important for productivity improvement of any manufacturing company. In this study we present an estimation procedure of standard time data for companies having multi-item extremely small quantity production type and discuss a case study. Included in the discussion are the importance of setup time reduction and the roles of management supervisors, and labor.

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The Size of the Cochran-Armitage Trend Test in 2 X C Contingency Tables: Two Multinomial Distribution Case

  • Kang, Seung-Ho;Ahn, Sun-Young
    • Communications for Statistical Applications and Methods
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    • 제15권3호
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    • pp.403-409
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    • 2008
  • In this paper we show that the peak of the type I error rate of the Oochran-Armitage trend test could be greater than the nominal level when $2\;{\times}\;C$ contingency tables obtained from two multinomial distributions are extremely unbalanced. This result justifies the use of the exact Cochran-Armitage trend test in extremely unbalanced $2\;{\times}\;C$ contingency tables.

폐 기형종 치험 2례 (Intrapulmonary Teratoma: Two Cases Report)

  • 이영;허진철;이건우;권기정;이호일;유회성
    • Journal of Chest Surgery
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    • 제5권2호
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    • pp.141-146
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    • 1972
  • The intrapulmonary teratoma is an extremely rare tumor. Since the orlginaI description by Black in 1981. about 19 cases have been reported in the would literature. We wish to describe the two cases of another patients with this extremely rare tumor.

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