Observing Comets pdf

英国伯明翰大学和伯明翰伊丽莎白女王医院的肿瘤学教授，目前正在开展一项重要研究，研究使用激素疗法治疗前列腺癌的重要性。 James 教授拥有伦敦大学学院医学和免疫学学位和帝国理工学院细胞周期生物学博士学位。他在伦敦、布鲁塞尔和东京接受了研究生培训，并且是皇家放射科医师和医师学院的研究员。 他的工作重点是评估和改进临床试验，以实现更好的患者结果。它通过大型多中心临床试验评估膀胱癌和前列腺癌的新治疗方法，并与实验室小组积极合作，探索在试验中发挥作用的潜在机制。 临床试验是将科学进步转化为患者存活率或相关结果改善（例如预防令人不快的并发症）的最终手段。 它需要许多（通常是数千名）参与者的合作，无论是作为患者还是在招募和运行研究的临床团队中。因此，良好的设计是优化实验进行以增加投资回报的关键。

Observing Comets pdf 尼克詹姆斯

Since comet Shoemaker-Levy collided with the planet Jupiter with stupendous force in 1994 there has been an upsurge of amateur interest in comets. Most comets are first discovered by amateur astronomers because there are so many amateurs looking for them, and techniques and instruments have improved dramatically in the past few years. After a short but detailed introduction to the comets themselves Nick James and Gerald North describe comet hunting, photographing and imaging comets, and digital image processing. The use of computers for orbital calculations and even helping to discover new comets is given a full chapter, as are advanced techniques including comet photometry and spectroscopy. This comprehensive book has an accompanying CD-ROM and is at once a "primer" for comet hunters and a reference text for more advanced amateur astronomers.