Professor H. Hashimoto,Hon. F.R.M.S

Book reviewed in this article: Thin Foil Preparation for Electron Microscopy. By P. J. Goodhew. An Introduction to the Optical Microscope. By Savile Bradbury. Techniques in Immunocytochemistry, Volume 3. Edited by G. R. Bullock and P. Petrusz. X-Ray Microanalysis in Electron Microscopy for Biologists. By A. J. Morgan. Self-Assessment in Histological Techniques. By John D. Bancroft and Brian T. Chalk. X-ray Microanalysis in Electron Microscopy for Biologists. By A. J. Morgan.     

The curious mechanical euclid of William Whewell, F.R.S. (1774–1866)

The origin of the little known and virtually unread work of well-known polymath William Whewell, The Mechanical Euclid, (1837) seems ascribable to 19th century concern with the exact teaching of Euclid. The book probably initially stimulated the interest of Isaac Todhunter and Charles Dodgson who so loudly championed Euclid a generation later. The main purpose of this Note relates to their concern with Euclid and rigour.In writing about one of Whewell's books we do not neglect to observe that this year is the 200th anniversary of his birth.^†     

接触式波导旋转关节结构设计

讨论了波导关节的功能要求,基本结构形式,针对宽频段旋转关节提出了接触式的结构方案,并介绍了其详细结构。     

SnO2导电薄膜的制备与研究

采用R．F反应溅射法制备SnO2导电薄膜，用XRD、AFM、XPS研究了薄膜的结构和组成对导电性能的影响。XRD和AFM研究表明，随着衬底温度的增加，SnO2薄膜从非晶向多晶结构转变，表面粗糙度减弱，薄膜的表面电阻大幅增加。采用XPS对薄膜表面成分进行分析，时不同衬底温度下Sn3d5／2拟合发现，薄膜表面存在Sn^2＋和Sn^4＋两种混合价态。随着村底温度的增加，Sn3d5／2能谱位置与峰宽并没有变化。对O1s能谱进行Gaussian拟合后发现，薄膜表面的氧以晶格氧（略）和化学吸附氧（Oahs^-）两种方式存在。实验证明，Oabs^-含量与SnO2表面电阻成正比关系。     

环境气氛对射频溅射镀膜的影响

综合考虑宏观条件对射频溅射镀膜过程的影响,采用等离子鞘层理论、理想气体理论、蒙特卡罗法,模拟在真空气压、气体流量、电压、温度等等参数综合作用后离子的能量、方向、分布等。相应实验验证结果与模拟结果较为一致,因此,可以认为目前的结论足以作为进一步模拟的条件。