Physicists achieve high precision in measuring strontium atoms using rubidium neighbor

Having good neighbors can be very valuable—even in the atomic world. A team of Amsterdam physicists was able to determine an ...
Investopedia

Churn Rate: Definitions, Examples, and Calculations

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Marguerita is a Certified Financial Planner ...
Investopedia

Understanding Days Sales Outstanding (DSO): Key Calculation and Applications

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...
国际原子能机构

什么是同位素水文学？

本文引述内容源自主题播客：解读“核”—何谓同位素水文学？点击此处收听完整访谈及同主题其他内容。 淡水是什么？分布于何处？ 地球水资源中约3%为淡水。这些就是我们饮用、沐浴和灌溉农田所用的水。 除了湖泊水体、河流中的流水以及冰川和冰盖中结冰的水之外，大部分淡水储存在地下含水层中不为人所见。 同位素水文学是核科学的一部分，揭示水循环过程，有助于我们理解不同水资源之间的内在联系。 科学家根据同位素指纹可 ...
Futurism

NASA Scientist Proposes Theory of Alien Civilizations Throughout Milky Way

Assuming our solar system’s newest interstellar object isn’t an alien mothership sent here to menace us, humankind still hasn’t spotted any signs of extraterrestrial life, let alone intelligence — ...
Canada

Reducing Enteric Methane Emissions from Beef Cattle

Canada’s Greenhouse Gas (GHG) Offset Credit System is established under Part 2 of the Greenhouse Gas Pollution Pricing Act to provide an incentive to implement projects that result in domestic GHG ...
一点资讯 on MSN

元素周期表为何如此整齐？他发现量子世界的“单身公寓”法则

你有没有想过，为什么我们身边的物质能保持稳定？石头不会突然消散，水也不会无缘无故变成其他物质——这背后，是微观世界的电子正遵循着一套严格的“秩序规则”。想象一下，如果原子世界没有规则，电子们可以随意挤在同一个位置、拥有完全相同的状态，我们的宇宙将会怎样？元素周期表将不复存在，化学反应会陷入混乱，构成我们世界的一切物质都将崩溃。20世纪初，一位年轻物理学家为原 ...