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Overview of Conductor Production for ITER Toroidal Field Magnet in Korea
Soo-Hyeon Park,Soun Pil Kwon,Won Woo Park,Heekyung Choi,Young Jae Ma,Young Ho Seo,Ki Hong Sim,Pyeong Yeol Park,Jun-Seg Lee,Il-Young Han,Sung Chan Kang,Dong Hee Lee,Turtu, S.,Di Zenobio, A.,Quagliata, IEEE 2014 IEEE transactions on applied superconductivity Vol.24 No.3
<P>The ITER toroidal field (TF) conductor is made up of superconducting Nb<SUB>3</SUB>Sn and copper strands assembled into a multistage, rope-type cable inserted into a conduit of butt-welded stainless steel jacket sections. For the ITER Project, the Korean Domestic Agency (KODA) took the responsibility of the procurement of 27 superconducting conductors for the ITER TF magnets. After concluding the Procurement Arrangement (PA) with the ITER International Organization in May 2008, KODA has been implementing the PA through four major industrial contracts: (1) Nb<SUB>3</SUB>Sn strand, (2) cable, (3) stainless steel jacket sections, and (4) jacketing. Prior to the production of conductors required for the TF coils, one 760-m-long copper dummy conductor and one 100-m-long superconducting conductor were fabricated for manufacturing process qualification. As of June 2013, 16 TF conductors were successfully manufactured. The full-size conductor performance tests in the SULTAN facility yielded very high performance. This article describes the technical requirements of the TF conductor and how KODA has been manufacturing the conductors with a high-level quality assurance/quality control system. It also presents the results of acceptance tests, including those of the SULTAN test.</P>
박영주(Park, Young-Ju),이해평(Lee, Hae-Pyeong),황미정(Hwang, Me-Jung),양영숙(Yang, Young-Suk),유재열(Yu, Jae-Yeol),이미리(Lee, Mi-Li) 한국화재소방학회 2011 한국화재소방학회 학술대회 논문집 Vol.2011 No.추계
건축물 내 외벽에 주로 사용되는 건축용 자재 중 샌드위치 패널은 양면으로 도장한 철판 사이에 심재로 단열재를 넣어 구성된 합성복합자재이다. 샌드위치 패널의 사용범위는 창고시설 및 공업용 건축 등의 용도로 많이 사용되고 있으며, 최근에는 시공에 따른 이점으로 주택 및 상업용등으로 널리 확대되어 사용되고 있다. 본 연구에서는 화재초기의 연기밀도는 인명 대피 시 시야확보에 있어 중요한 역할을 하기에 현재 국내에서 사용되는 건축용 외장재를 용도별로 선정하여 시간에 따른 연기밀도의 값을 구하고 용도에 따른 화재 연기의 확산 정도를 예측하는데 목적을 두었다.
( Kui Young Park ),( Woo Sun Jang ),( In Pyeong Son ),( Sun Young Choi ),( Moo Yeol Lee ),( Beom Joon Kim ),( Myeung Nam Kim ),( Byung In Ro ) 대한피부과학회 2013 Annals of Dermatology Vol.25 No.1
Background: Alopecia areata (AA) is believed to be an organ-specific autoimmune disease in which a mononuclear cell infiltrate develops in and around anagen hair follicles. There is no definitive therapy for AA. Objective: We sought to determine whether the combination therapy of cyclosporine and psoralen plus ultraviolet A (PUVA) could be an effective treatment for severe AA. Methods: A total of 41 patients with severe AA were treated with oral cyclosporine and topical PUVA. Cyclosporine was given at an initial daily dose of 200 mg for adult and 100 mg for children for periods of up to 16 weeks. Eight-methoxypsoralen (Methoxsalen) was applied topically 20 minutes prior to ultraviolet A (UVA) exposure, and the patients were irradiated with UVA twice a week for 16 weeks. Results: Of the total 41 patients, 2 (7.3%) patients were lost to follow-up, and 1 (2.4%) patient discontinued the treatment due to abdominal discomfort. Six (14.6%) patients were treated for less than 12 weeks. Of remaining 32 patients, 3 (9.4%) showed excellent response, 3 (9.4%) showed good response, 12 (37.5%) showed fair response, and 14 (43.7%) showed poor response. Conclusion: Although limited by its uncontrolled character, this study shows that the combination therapy with cyclosporine and PUVA may be an additional choice for severe and recalcitrant AA. (Ann Dermatol 25(1) 12∼16, 2013)
Strain dependence of critical current in internal tin process Nb<sub>3</sub>Sn strands
Oh, Sangjun,Park, Soo Hyeon,Lee, Chulhee,Chang, Yongbok,Kim, Keeman,Park, Pyeong-Yeol IEEE 2005 IEEE transactions on applied superconductivity Vol.15 No.2
The development of a high performance superconducting magnet requires a thorough understanding of the strain effect in the critical current density (J<SUB>c</SUB>) of Nb<SUB>3</SUB>Sn strands. A modified version of the WASP device is used for the investigation of the strain effect. The spring is made of BeCu alloy and is capable of applying strain up to 0.7% reversibly at 4.2 K. Several types of high performance Nb<SUB>3</SUB>Sn strands (J<SUB>c</SUB>>1000 A/mm<SUP>2</SUP> at 12 T and 4.2 K) have been developed using internal tin process. A comparative study on the axial strain dependence of the critical current is performed.
Iodine을 촉매로 하는 화학적 수송방법에 의한 CdS 단결정의 성장과 그 특성에 관한 연구(I)
신영진,박병호,정태수,서영우,유기수,김택성,강석일,유평렬 순천대학교 기초과학연구소 1990 基礎科學硏究誌 Vol.1 No.-
Iodine을 촉매제로 하는 화학적 수송방법으로 CdS분말 3g을 증발함에서 결정화함으로 수송하는데 96∼154시간이 소요되었다. 이렇게 성장한 CdS 단결정은 X-선 회절기에 의해서 육방정계임을 알게되었다. 전자현미경으로 Cd, S 및 iodine의 X-선을 찾아보았더니 iodine 성분의 X-선을 찾아 볼 수 없었다. Van der pauw 방법으로 측정한 Hall 효과로부터 CdS 단결정은 n형이고 carrier 농도는 ∼10^17㎝^-3정도이며 활성화에너지 E_d값은 0.63eV 정도임을 알게되었다. The time required to transport CdS powder 3 gram in the vaporization chamber into the crystallization chamber by the method of chemical vapor transport which was used iodine as a transporting agent was 96-154 hours. The single crystal grown by the above method was found hexagonal system using X-ray diffractometer. Cd and S, iodine characteristic X-rays were examine by eletron microscope but there was no iodine characteristic X-ray. This single crystal was found n-type and the activation energy, E_d, was about 0.63eV. The carrier density was about ∼10^17㎝^-3. These results was followes by effect using Van der Pauw method.