• Title/Summary/Keyword: Ne

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Comparison of Ionosphere Models for Single Frequency GNSS Receiver (단일주파수 GNSS 수신기를 위한 전리층 모델 비교)

  • Lee, Chang-Moon;Park, Kwan-Dong
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2010.04a
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    • pp.147-150
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    • 2010
  • Ionopheric deley is the largest error sources in GNSS positining. The single frequency receiver user needs an ionospheric model like the Klobuchar model or NeQuick model to eliminate the ionospheric error. In this study we estimated VTEC(Vertical Total Electron Content) over DAEJ station using the two models in each season. We compared the results with Global Ionosphere Maps and International Reference Ionosphere model predictions. As a result, the NeQuick model was more accurate than Klobuchar model.

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Optimum Condition for Xe Gas Excitation in Plasma Display Panels through Ternary Gas of He, Ne, Xe

  • Khorami, Alireza;Ghanbari, Shirin
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.744-747
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    • 2009
  • Plasma Display Panels (PDPs) have illustrated impressive results in terms of light emission efficiency of the Ne-Xe mixture compared with the He-Xe mixture. However, He-Xe has shown to achieve superior color purity. This paper presents the optimization of excitation efficiency and color purity for He-Ne-Xe ternary gas mixtures. Furthermore, we investigate the effect that a protective dielectric layer has on UV photon efficiency in a matrix known as electrode type PDP.

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Voltage-dependent Ion Channels in the Neuroendocrine Cells of Rat Prostate

  • Kim, Chun-Hee;Uhm, Dae-Yong;Kim, Sung-Joon
    • Proceedings of the Korean Biophysical Society Conference
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    • 2001.06a
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    • pp.44-44
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    • 2001
  • Neuroendocrine (NE) cells are abundant in the prostate at birth and then disappear from the peripheral zone, only to reappear during puberty, after which their number slowly increases during adult life. NE cells are believed to play an important role in prostate growth and differentiation. The present study was undertaken to investigate the characteristics of ion channels existing in NE cells of rat prostate gland.(omitted)

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Suppression of Strategic Capacity Withholding by Capacity Payment in a Competitive Generation Market (경쟁적 전력시장에서 용량요금에 의한 전략적 용량철회 억제)

  • Lee, Kwang-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.7
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    • pp.1199-1204
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    • 2007
  • In a cost based pool market, the generation capacity can be used as strategic bids by generation companies (Gencos) with the cost functions open to the market. Competition using strategic capacities is modeled by Cournot and Perfect Competiton (PC) model, and transformed into two by two payoff matrix game with Gencos' decision variables of Cournot and PC model. The payoff matrices vary when capacity payments are given to Gencos in accordance with their capacity bids. Nash Equilibrium (NE) in the matrices also moves with capacity price changes. In order to maximize social welfare of the market, NE should locate in a certain position of the payoff matrices, which corresponds to a PC NE. A concept of a critical capacity price is proposed and calculated in this paper that is defined as a minimum capacity price leading to PC NE. The critical capacity price is verified to work as a tool for suppressing a strategic capacity withholding in simulations of a test system.

Neonatal Encephalopathy Complicated with Septic Arthritis in a Foal

  • Jeong, Hyohoon;Oh, Taeho
    • Journal of Veterinary Clinics
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    • v.35 no.5
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    • pp.243-246
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    • 2018
  • A 2-day-old Thoroughbred foal weighing 58 kg was admitted to the Equine Hospital of Korea Racing Authority (KRA) Jeju Stud Farm with clinical signs including loss of suckling behavior and barking. Neonatal encephalopathy (NE) was diagnosed based on history and typical clinical signs of NE. The foal seemed to recover in 5 days of intensive care and treatment but then was complicated with the septic arthritis of left hock joint on the $6^{th}$ day of admission. A course of aggressive systemic antimicrobial therapy with joint lavage for 8 days was conducted and the foal was fully recovered and discharged. The follow up on the patient after 2 years revealed that the patient achieved a great success as a racehorse without any unexpected sequel. This report describes a course of NE complicated with septic arthritis in a foal and the clinical outcome of the intensive care and treatment in detail. To our knowledge, this is the first report which describes NE complicated with septic arthritis in a foal in Republic of Korea.

Fabrication of He-Ne ellipsometer and in-situ measurement of effective density variation of $TiO_2$thin films (보급형 He-Ne 타원해석기의 제작과 $TiO_2$ 박막 유효밀도 변화의 in-situ 측정)

  • 김상준;방현용;김상열
    • Journal of the Korean Vacuum Society
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    • v.8 no.4A
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    • pp.432-437
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    • 1999
  • We have fabricated an in situ ellipsometer operating at He-Ne wavelength. It can be applied to the real-time, in-situ tracking of the ellisometric change which occurs during various sample treatments. As a rotating analyzer type, all optical elements and related parts are designed to share a common hollow-axis configuration, and hence the ellipsometer is compact in shape and simple in design. It is mountable on the spare ports of vacuum chamber with ease. Using this ellipsometer, we observed the effective density variation of previously grown $TiO_2$ thin films by using electron beam evaporation. The packing density of the as-grown film was 82%. When exposed to atomsphere, the micro-void of the film was filled with water vapor. This water-filled $TiO_2$ thin film was subject to heating/cooling cycles in vacuum and the ellipsometric variation versus temperature and cycling number was measured in real time using this in situ He-Ne ellipsometer.

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Discharge Characteristics of Low Xe and High Xe Content in He-Ne-Xe Gas Mixture in PDP

  • Kwon, Oh-Yung;Bae, Hyun-Sook;Whang, Ki-Woong
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.366-368
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    • 2008
  • The discharge characteristics of He-Ne-Xe gas mixture with the variation of Xe content are investigated through the numerical simulation. VUV efficacy in the gas condition of low Xe content increases due to more excitation and the case of high Xe content shows the improvement of VUV efficacy with the increase of He content but decreased VUV efficacy after tthe He mixing ratio of He and Ne is 0.5 due to frequent ionization.

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A Study of the medical Books before the HawngJeNeKyung (황제내경(黃帝內經) 이전(以前)의 의학서적(醫學書籍)에 관한 고찰(考察) -황제내경(黃帝內經)의 인용문헌(引用文獻)을 중심으로-)

  • Kim, Hoon
    • The Journal of Korean Medical History
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    • v.16 no.1
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    • pp.63-112
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    • 2003
  • Although the HawngJeNeKyung(黃帝內經) was regarded as the the extremly aged book in oriental medicine history, We can find out many quotations in the HawngJeNeKyung. Some of this quotations are applicable to the age of the Warring States(戰國), but the other quotations are correspond to its after the period of HouHan(後漢). The books included before the QianHan(前漢) are 12 kinds of books, such as KyuTak(揆度), KiHang(奇恒), SangKyung(上經), HaKyung(下經), etc. The books included after the HouHan(後漢) are 5 kinds of books, such as CheonWonOkChek(天元玉冊), DaeYo(大要), HyunJuMilEo(玄珠密語), etc. Founded on these various books, the theories of oriental medicine was accomplished in the HawngJeNeKyung.

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Influence of gas mixing ration on secondary electron emission coefficient of MgO single crystal with different orientations and MgO protective layer

  • 임재용
    • Proceedings of the Korean Vacuum Society Conference
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    • 1999.07a
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    • pp.234-234
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    • 1999
  • AC-PDP(Plasma Display Panel)에 사용하는 MgO 보호막의 이차전자 방출계수(${\gamma}$)는 AC-PDP의 방전특성을 결정짓는 중요한 요소이다. MgO 보호막의 이차전자 방출계수는 AC-PDP에 주입하는 기체의 종류에 영향을 받는다. 현재 AC-PDP에는 방전특성의 향상과 VUV 발생을 위하여 He, Ne, Ar, Xe 등의 비활성기체를 두가지 혹은 세가지로 혼합한 혼합기체가 사용되고 있다. 기체를 혼합할 경우 Penning 효과에 의해 더 좋은 방전특성을 얻을 수 있는 것으로 알려져 왔으며, 이때의 적절한 혼합비율을 찾는 것은 AC-PDP의 효율 개선에 매우 중요하다. 이번 실험에서는 (111), (100), (110) 각각의 방향으로 배향된 MgO Bulk Crystal과 MgO 보호막의 이차전자방출계수를 He+Ne+Xe 삼원기체를 사용하였다. MgO 보호막은 실제 21inch 규격의 Panel을 사용하였으며, 혼합기체의 혼합비율의 Ne:Xe을 99:1, 98:2, 96:4, 93:7과 He+Ne+Xe의 삼원기체로 다양하게 변화시켜 가며 실험하였다.

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Effect of High-tyrosine Diet on Brain Norepinephrine Metabolism in Immobilization-Stressed Rats

  • Yoon Hae Seong
    • Journal of Nutrition and Health
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    • v.26 no.7
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    • pp.858-866
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    • 1993
  • S.D.rats were fed with 3.4% tyrosine supplemented diet for 5 days. Tyrosine diet had no effects on brain NE and MHPG-SO4 levels in non-stressed rats. When these animals were given 3 hr-immobilization stress, they responded in a manner that coped better to the stress. This was measured by the increase in brain MHPG-SO4 indicating the increase in norepinephrine turnover by the stressed animals. When rats were stressed, fed basal or high-tyrosine diet, brain tyrosine concentration dropped more than 26% over the non-stress control animals. 3-hr immobilization stress also decreased brain NE levels. However, while the stress resulted in a significant decrease(p<0.05) of brain NE in basal diet, the decrease was not significant in high-TYR diet group. And as the stress index, serum corticosterone, glucose, and free fatty acid concentratons also were assayed. In this study, it was found that high-TYR diet prevented the stress-induced depletion of brain NE and suppressed the rise in serum corticosterone, glucose, and free fatty acid. These results suggest that high-TYR diet increases the coping ability of body to stress.

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