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中国抗癌协会神经肿瘤专业委员会第八届学术会议

作者： Danny TM Chan Rebecca YT Ng XL Zhu deyond yw siu Michael KM Kam Brigette BY Ma Jesse Pang HK Ng WS Poon The CUHK Brain Tumour Centre Prince of Wales Hospital The Chinese University of Hong Kong

＜正＞Background With the introduction of the oral chemotherapeutic agent,temozolomide,it is now the standard of care to offer concomitant chemoradiotherapy to patients with glioblastoma *** was reported that around 2...

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Validation of an Algorithm based on parameters in Non-Contrast Computerized Tomogram for selection of upper ureteral stone for shock wave lithotripsy

Validation of an Algorithm based on parameters in Non-Contra...

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第十五届全国泌尿外科学术会议

作者： Chi-Fai Ng Annie Wong deyond siu Kak-tak Wong Eddie Chan Department of Surgery and Department of Diagnostic Radiology and Organ Imaging The Chinese University of Hong Kong

Introduction and Objective: There is increase recognition of the role of various parameters measured by non-contrast computerized tomogram (NCCT) in predicting treatment outcomes of urinary stone by shockwave lithotripsy (SWL). In our previous analysis, a clinical algorithm, based on stone volume (SV), mean stone density (MSD) and skin-to-stone distance (SSD), was formulated. (J Urol 2007;177 supp: A1316) Therefore, we would like to use our subsequent patients to validate the usefulness of this algorithm. Methods: After our first part of study, a further prospective collection of data from patients diagnosed to have solitary upper ureteral stone by NCCT and received primary SWL was performed. The primary outcome was the stone free rate at 3-month after one session of SWL by Sonolith 4000+. Pre-treatment NCCT were reviewed by a single radiologist with SV, MSD and SSD measured. These patient parameters were then applied into our algorithm to assess its validity in predicting treatment outcome. Results: 37 patients (24 males and 13 females) were recruited. The overall stone free rate was 45.9%. By applying the algorithms, for patients with either SV ≤ 0.2cc or MSD ≤600 or SDep ≤ 85mm, the stone free rate was 52.2% (95% CI 31.7%, 72.7%). For those patients without any favourable factors, the stone free rate was 35.7% (95% CI 10.6%, 60.8%). Although the difference was not statistically significant, a trend of difference can still be observed in this small sample. Conclusions: Clinical algorithm based on the measurement of stone volume, mean stone density and skin to stone distance from NCCT can help to predict the treatment outcome of SWL in upper ureteral stone.

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Magnetoelectric and converse magnetoelectric responses in Tb_xDy_(1-x)Fe_(2-y) alloy & Pb(Mg_(1/3)Nb_(2/3))_(1-x)Ti_xO_3 crystal laminated composites

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Chinese Science Bulletin 2008年第14期53卷 2129-2134页

作者： JIA YanMin LUO HaoSu OR siu Wing WANG YaoJin CHAN Helen L W State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 201800 China Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China

Measured results of magnetoelectric (ME) and converse magnetoelectric (CME) effects of TbxDy1-xFe2-y/ Pb(Mg1/3Nb2/3)(1-x)TixO3/TbxDy1-xFe2-y (TD/PMNT/TD) and PMNT/TD/PMNT laminated composites are pre- sented. ME effect was determined by measuring laminate voltage output under a Helmholtz-gener- ated AC field biased by a DC field (0―1 kOe) (1 Oe = 79.58 A/m). The CME effect was measured by re- cording the voltage induced in a solenoid encompassing the ME sample while exposed to a DC bias field and PMNT layer driven by a 10 V AC source. The ME and CME responses in the two laminated structure are linear. The highest values of ME coefficients in TD/PMNT/TD and PMNT/TD/PMNT com- posites are 384 mV/Oe and 158 mV/Oe, respectively, while the highest values of CME coefficients in the two composites are 118 mG/V and 162 mG/V (1 G=10-4 T), respectively.

关键词：磁电效应压电性复合材料合金晶体结构

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Magnetoelectric and converse magnetoelectric responses in TbxDy1-xFe2-y alloy & Pb(Mg1/3Nb2/3)1-xTixO3 crystal laminated composites

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Science Bulletin 2008年第14期 2130-2135页

作者： OR siu Wing CHAN Helen L W Department of Applied Physics The Hong Kong Polytechnic University

关键词： magnetoelectric effect converse magnetoelectric effect piezoelectricity magnetostriction TbxDy1-xFe2-y alloy Pb(Mg1/3Nb2/3)(1-x)TixO3 crystal

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复合材料Terfenol-D/PMNT的磁电和逆磁电响应

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科学通报 2008年第10期53卷 1172-1176页

作者：贾艳敏罗豪甦 Or siu Wing 汪尧进 Chan Helen L W 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室上海201800 香港理工大学应用物理系

给出了Terfenol-D/PMN-PT/Terfenol-D(TD/PMNT/TD)和PMNT/TD/PMNT两种层状复合材料的磁电和逆磁电响应的测试方法和测试结果.这两种复合结构的优化直流偏置磁场大小均为350Oe(1Oe=79.58A/m).在1kHz频率下,这两种复合材料的最大磁电电压... 详细信息

给出了Terfenol-D/PMN-PT/Terfenol-D(TD/PMNT/TD)和PMNT/TD/PMNT两种层状复合材料的磁电和逆磁电响应的测试方法和测试结果.这两种复合结构的优化直流偏置磁场大小均为350Oe(1Oe=79.58A/m).在1kHz频率下,这两种复合材料的最大磁电电压系数分别为384mV/Oe和158mV/Oe,最大逆磁电系数分别为118mG/V和162mG/V(1G=10-4T).另外研究了这两种复合材料在谐振频率下的磁电响应.通过对两种复合结构的比较得知,磁致/压电/磁致复合结构具有好的磁电响应;而压电/磁致/压电复合结构具有好的逆磁电响应.这一结果有助于优化设计高性能压电/磁致复合磁电材料.

关键词：磁电效应压电材料磁致伸缩材料

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