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Jee, S.H.,Lee, K.S.,Kim, J.H.,Yoon, Y.S. Elsevier 2013 Current Applied Physics Vol.13 No.9
Hydrothermal crystallization was conducted to improve the diffusion barrier performance of Zr thin films to prevent a fuel clad chemical interaction (FCCI) at the interface between a clad material and lanthanide elements (Mischmetal: 75Ce-25La; intermetallic compound) as fission product. The crystalline phase and size of Zr thin films deposited on a HT9 disk by RF magnetron sputtering were varied by hydrothermal crystallization in an autoclave at 393 K, 423 K and 453 K. Diffusion couple tests of the clad with and without a Zr diffusion barrier were performed at 933 K for 25 h with mischmetal, which have diffusion properties similar to uranium metal composite fuel. While substantial FCCI occurred at the interface between the mischmetal and clad in the specimen without hydrothermal crystallization, the Zr barrier with hydrothermal crystallization showed excellent resistance to FCCI. The performance of the Zr FCCI barrier was improved due to a decrease in interdiffusion by the grain boundary, which can increase the FCCI in the Zr barrier.
High-efficiency, 6.6-29 V pulse driver using charge redistribution
Choi, K.-J.,Jee, D.-W. Institution of Electrical Engineers 2018 Electronics letters Vol.54 No.12
<P>Fully integrated high-voltage pulse driver with low voltage supplies and low voltage switching signals is described. Using charge redistribution for the output drive significantly reduces switching losses in the load capacitors even with the high-voltage output swing. The proposed circuit implemented with 0.18 mu m HV LDMOS technology achieves 24-55% efficiency improvement for 20 k-1 MHz 29 V pulse generation with 1.2 and 3.3 V supply voltage.</P>
Kang, Eun-Young,Jee, Sung Ju,Kim, Cuk-Seong,Suh, Kwang-Sun,Wong, Alex W.K.,Moon, Jae Young Elsevier 2018 Journal of critical care Vol.44 No.-
<P><B>Abstract</B></P> <P><B>Purpose</B></P> <P>Early cognitive assessment in the intensive care unit (ICU) is essential to monitor cognitive dysfunction after critical illness. We have implemented a Computer Cognitive Senior Assessment System–Screen (CoSAS–S) which is a brief, objective, and tablet-based cognitive screening test as a mobile platform to detect any cognitive problems in ICUs. This study aimed to evaluate the feasibility and initial validation of a tablet-based CoSAS–S in critically ill patients with sepsis.</P> <P><B>Materials and methods</B></P> <P>Thirty-six eligible patients completed CoSAS–S, Mini-Mental State Examination–Korean Version (MMSE–K) and Korean Version of Montreal Cognitive Assessment (K-MoCA) for validity testing at the ICU.</P> <P><B>Results</B></P> <P>Eighty-eight percent of programmed assessments were completed by the sample. Spearman correlations of the CoSAS–S with MMSE–K (rho=0.613–0.874, p<0.00) and K–MoCA scores (rho=0.666–0.897, p<0.001) were moderate to high. Intra-class correlation coefficient (ICC) of total CoSAS–S score between two raters was 0.93 (p<0.001; 95% CI=0.82–0.97), suggesting the inter-rater reliability of CoSAS-S was excellent.</P> <P><B>Conclusions</B></P> <P>Support was found for the feasibility and validity of CoSAS-S. The application of CoSAS-S could identify the cognitive functioning of the patients. Utility of CoSAS-S in other clinical populations should be tested.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cognitive Senior Assessment System–Screen (CoSAS–S) is a mobile flat-form, tablet-based cognitive screening test. </LI> <LI> This study supports the feasibility and validity of tablet-based cognitive screening, ‘CoSAS-S’ in patients with sepsis. </LI> <LI> CoSAS-S could identify the critically ill patients without cognitive dysfunction in the ICUs. </LI> <LI> Utility of CoSAS-S in other clinical settings should be studied in the future study. </LI> </UL> </P>
각종 갑상선질환에서의 항Thyroglobulin 항체 및 항Microsome 항체의 출현빈도에 관한 연구
이문호,고창순,이홍규,이권전,김병국,최강원,박성회,지제근,이상국 대한핵의학회 1979 핵의학 분자영상 Vol.13 No.1
저자들은 각종 갑상선질환에서 갑상선자가항체의 출현빈도를 조사하여 이들 항체가 갖는 진단적 가치를 관찰하고저, 1978년 4월부터 1979년 4월사이에 서울대학교병원 내과에 내원하였던 각종 갑상선질환환자 108명과 정상인 15명을 대상으로 하여, 감작혈구응집반응을 이용하여 항 thyroglobulin 항체와 microsome 항체를 측정하여 다음과 같은 결론을 얻었다. 1) 정상인 15명에서의 항 thyroglobulin 항체는 모두 음성이었는데, 항 microsome 항체는 1명(6.7%)에서 양성이었다. 각종 갑상선질환환자 108명에서의 결과는 각각 34명(31.5%) 및 40명(37.0%)이 양성이었다. 2) Graves병 환자 25명에서는 항 thyroglobulin 항체는 7명(28.0%)이 양성이었으나 항 microsome 항체는 9명(36.0%)에서 양성이었고, 음성인 군과 양성군 사이에 임상소견 및 검사소견이 특별한 차이를 볼 수 없었다. 3) Hashimoto병 환자는 18명으로 이들은 모두 침생검소견으로 확진된 예들로서, 두가지 항체가 각각 16명(88.9%)과 17명(94.4%)에서 양성이었다. 4) Familial goiter 환자는 7명이었는데 각각 4명(57%) 및 6(85%)명에서 양성이었다. 5) 양성갑성선종 35명에서는 각각 2명(5.7%) 및 3명(8.6%)이 양성의 소견을 보였으며, 갑상선암종 16명에서는 각각 3명(18.8%)이 양성이었다 6) 2명의 아급성갑상선염환자는 두가지가 모두 음성이었던데 반하여, 원발성점액수종환자 1명은 수검검사에서 양성이었다. 7) 1:802 이상의 고력가를 보인 예는 항 thyroglobulin 항체의 경우는 16명(14.8%)이었고, 이중 10명(62.5%)이 Hashimoto병이었으며, 항 microsome항체의 경우는 20명중 13명(65.0%)이 Hashimoto병이었다. 8) Tg Ab와 Mc Ab의 상관계수는 0.76으로 상관관계가 비교적 높으며 Mc Ab의 양성빈도가 약간 높았다. 이상의 결과를 종합하면 감작혈구응집반응은 간편하고 예민하며 신뢰도 및 재현성이 높은 검사로 생각되며 이 방법으로 측정한 항 thyroglobulin 항체 및 항 microsome 항체는 Hashimoto병에서 그 검출빈도가 높고 그 역가도 높아 Hashimoto병의 진단에 유용하다고 사료된다. The authors investigated the incidence of antithyroglobulin antibodies and antibodies and antimicrosomal antibodies measured by tanned red cell hemagglutination method in subjects suffering from various thyroid disorders. 1) In 15 normal patients, neither suffering from any thyroid diseases nor from any other autoimmune disorders, the antithyroglobulin antibodies were all negative, but the antimicrosomal antibody was positive only in one patient(6.7%). 2) The antithyroglobulin antibodies were positive in 31.5%(34 patients) of 108 patients with various thyroid diseases, and the antimicrosomal antibodies were positive in 37.0%(40 patients). 3) of the 25 patients with Graves' diseases, 7 patients(28.0%) showed positive for the antithyroglobulin antibodies, and 9(36.0%) for the antimicrosomal antibodies. There was no definite differences in clinical and thyroid functions between the groups with positive and negative results. 4) Both antibodies were positive in 16(88.9%) and 17(94.4%) patients respectively among 18 patients with Hashimoto's thyroiditis, all of them were diagnosed histologically. 5) Three out of 33 patients with thyroid adenoma showed positive antibodies, and 3 of 16 patients with thyroid carcinoma revealed positive antibodies. 6) TRCH antibodies demonstrated negative results in 2 patients with subacute thyroiditis, but positive in one patient with idiopathic primary myxedema. 7) The number of patiencs with high titers($gt;l:802) was 16 for antithyroglobulin antibody, and 62.5%(10 patients) of which was Hashimoto's thyroiditis. Thirteen(65.0) of 20 patients with high titers($gt;l:802) for antimicrosomal antibody was Hashimoto's thyroiditis. TRCH test is a simple, sensitive method, and has high reliablity and reproducibility. The incidences and titers of antithyroglobulin antibody and antimicrosomal antibody are especially high in Hashimoto's thyroiditis.