An electromagnetic pulse is a burst of electromagnetic energy in the atmosphere, considered capable of widespread damage to power lines, telecommunications, and electronic equipment. There is no danger to cars from EMP. A high altitude EMP can last several hours or even days, if the EMP has ionised atmospheric particles and molecules. A powerful EMP can also directly affect magnetic materials and corrupt the data stored on media such as magnetic tape and computer hard drives.
How far away is the horizon?
The distance along the surface of the earth to the horizon is called horizon distance. For example, if your eye is 5 feet about ground level, then the horizon distance is about 4.40668 km away.
Calculation of pi up to 33.55 million digits
QGIS – Geographical Information System (GIS)
QGIS is a full-featured, user-friendly, free-and-open-source (FOSS) geographical information system (GIS) that runs on Unix platforms, Windows, and MacOS.
Date Time Viewer
Accord.NET Framework for .NET
Accord.NET is a machine learning, computer vision, statistics and general scientific computing for .NET.
Sleep Cycle Calculation
Waking up in the middle of a sleep cycle will likely make you feel tired and groggy, but waking up in between these cycles lets you wake up feeling refreshed and alert. Sleep Cycle helps to maintain your sleep times.
MicroDicom DICOM Viewer
MicroDicom is an application for primary processing and preservation of medical images in DICOM format.
Free and flexible textbooks and resources
OpenStax is Rice University’s nonprofit education technology initiative. They provide free, peer-reviewed textbooks that cover standard scope and sequence requirements for introductory college and Advanced Placement® courses.
