General principles are formulated for the objective reconstruction of a three dimensional object from a set of electron microscope images. These principles are applied to the calculation of a ...

Today, dry and cloudy for the most part, although a few brighter breaks will develop at times. Towards the evening, it will turn overcast with a band of light rain moving in. Breezy and milder ...

Global mean surface warming throughout the 21st century will be largely determined by cumulative emissions of carbon dioxide (CO 2) and the other long-lived greenhouse gases, and what proportion of ...