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Geun-Young Jeong,Seok Pil Jang,Ho-Young Lee,Jong-Chul Lee,Seyong Choi,Se-Hee Lee IEEE 2013 IEEE transactions on magnetics Vol.49 No.5
<P>Magnetic-thermal-fluidic analyses were conducted to assess the cooling performance of magnetic nanofluids by comparing the performance with that of transformer oil and air using the fully coupled finite element method (FEM) considering the magnetoconvection phenomena. Magnetic nanofluids (MNFs) have been studied extensively for bio- and nanotechnology applications. In particular, some studies reported that the MNF has good characteristics for thermal management and electric insulation in experiments. With this motivation, this study focused on the cooling performance of MNFs including the experimental and numerical approaches. Until now, research on the cooling effect of MNF has focused mainly on heat propagation without any real magnetic system, in which the magnetic force plays a key role in driving fluidic flow. This flow driven by the magnetic force density was related to the magnetoconvection effect. To analyze this effect quantitatively, a coupled analysis technique should be developed using the magnetic-thermal-fluidic equations. To validate the cooling performance of MNFs numerically, the numerical results were verified by a comparison with those from the experimental tests in the air, transformer oil, and MNF. After confirming the numerical setup, some experiments were conducted with a vertical solenoid coil immersed in a MNF with different volume fractions of magnetic nanoparticles. The temperature at the inside part of the coil decreased dramatically by approximately 5<SUP>°</SUP> C in the 7 vol. % MNF compared to the transformer oil. These temperatures were also predicted well using the proposed numerical setup.</P>
장진우(Jang, Jin Woo),송근필(Song, Geun Pil),이범관(Lee, Beom Gwan) 대한부동산학회 2008 大韓不動産學會誌 Vol.26 No.1
본 연구의 목적은 중국토지학회지 게재논문의 실태를 조사ㆍ분석하고, 그에 대한 특성을 제시하는 것이었다. 이상과 같은 연구의 목적을 효율적으로 달성하기 위해 연구대상을 중국토지학회지로 한정하였다. 연구범위는 시간적 범위로 2003년부터 2007년까지로 하였고, 공간적 범위로 중국을 대상으로 하였으며, 내용적 범위는 중국토지학회지 게재논문의 특성을 제시하는 것으로 국한하였다. 본 연구에서 사용된 연구방법은 역사적 접근방법, 문헌조사법 및 인터넷조사법, 통계적 분 석방법을 사용하여 연구를 수행하였다. 연구결과, 중국토지학회지 게재논문의 특성은 외형적 특성과 내용적 특성으로 구분되었다. 먼저, 중국토지학회지 게재논문의 외형적 특성으로는 첫째, 다량의 게재논문으로 인한 지적학의 발전잠재성을 들 수 있다. 둘째, 게재논문 구성의 자율성이 나타났다. 셋째, 중국토지학회지의 대학원생 참여가 우수한 것으로 나타났다. 중국토지학회지 게재논문의 내용적 특성으로는 첫째, 토지제도를 연구대상으로 한 게재논문의 편향된 것으로 나타났다. 둘째, 특정 지역의 도 시화를 연구대상으로 한 논문의 다양한 것으로 나타났다. The objective of this study is to examine some problems by analyzing the characteristics of papers which have been contributed to Journal of the China Land Science Society and then to suggest an improved plan for a raise of the condition of the China Society of Cadastre. In order to achieving this goals, we had intended to limit a period of time from 2003 up to 2007 and analyzed the papers of the time. The descriptive method was tried for this study. And also we referred to sundry records and used datum or information in internet web-sites. The results of this study, the thesis of Journal of the China Land Science Society classified characteristics of contents and external peculiarities. The external peculiarities of papers of Journal of China Land Science Society, above all, great volume of papers presents potential for development in cadastrology. Secondly, the thesis constructed autonomously. Third, graduate students superiority participate in Journal of the China Land Science Society. The contents characteristics of papers of Journal of China Land Science Society, first, the thesis inclined toward the land system on object of study. The third, there are diversity papers which studied urbanization of specific regions.
갑상선침생검으로 확인된 아급성 갑상선염 26예의 임상적 고찰
장필식 ( Jang Pil Sig ),김의현 ( Kim Ui Hyeon ),배경태 ( Bae Gyeong Tae ),권규돈 ( Kwon Gyu Don ),이종곤 ( Lee Jong Gon ),정의룡 ( Jeong Ui Lyong ),오용구 ( O Yong Gu ),박형근 ( Park Hyeong Geun ) 대한내과학회 1990 대한내과학회지 Vol.38 No.6
N/A The clinical features and laboratory findings of 26 patients with histologically-proven subacute thyroiditis were examined from March 1984 to December 1988 at the Masan Koryo Hospital. The results were as follows: 1) All 26 patients with subacute thyroiditis were women, and the age distribution showed the peak incidence to be between the third and fourth decades(average age : 40 years). 2) The seasonal distribution showed the peak incidence to be between summer(34.6%) and autumn(30.8%). 3) The chief complaints were frequent anterior neck pain(69.2%), anterior neck swelling(23.1%) and fever(7.7%). The peak time from onset was 1-2weeks(50.0%). 4) On physical examination, 15 cases were nodular goiter(57.7%), and 11 cases were diffuse goiter(42.3%). All cases except one had moderate or severe tenderness. All 26 cases had a firm or hard consistency. 5) The mean value of ESR was elevated to 40.9 mm/ hr, and 12 cases(46.2%) were of mild or moderate hyperthyroid status. The serum thyroglobulin level was checked in 19 patients, and the mean value was elevated to 169.1 ng/ml. The positive rates for antithyroglobulin and antimicrosomal antibody were 1/24 and 3/24, respectively. 6) The thyroid scans were classified into the follwing groups: 15 cases(57.7%) showed both lobes nearly nonvisualized, 10 cases(38.5%) showed one lobe nearly nonvisualized, and one case(3.8%) showed both lobes slightly diffuse and enlarged. 7) Among the 26 cases, four were checked with radioactive iodine uptake(RAIU). The value was markedly depressed from 1-4% in all cases except one. 8) With aspirin or prednisolone therapy, the pain subsided and the goiters were reduced within several days.