A new book examines the story of the Traveller: a teacher, gamekeeper, guardian and practical guide for wayfinding in the ...

Kashipur conducted the first session of a special two-day online expert lecture series on Indian Knowledge Systems (IKS) for ...

脉泽：微波波段的激光1、脉泽与激光在电磁波谱中的定位激光（Laser）作为日常生活中广泛应用的设备（如激光笔、激光打印机），其原理广为人知。与之相比，脉泽（Maser）作为激光在微波波段的物理原型（图1），由于工作波长远超可见光范围，其存在与重要性却 ...