Pink noise

Pink noise is a signal that has been generated by combining multiple noise sources together. The resulting signal has a flat power spectral density, which means that it has equal power at all frequencies. Pink noise is often used in audio applications, as it can help to mask other sounds that may be present. It … Read more

Graph database

A graph database is a database that uses graph structures for semantic queries with nodes, edges, and properties to represent and store data. A key concept of the system is the graph, which directly relates data items in the store. The relationships allow data in the store to be linked together directly, and in many … Read more


A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases. Originally, nebula referred to any diffuse astronomical object, including galaxies beyond the Milky Way. The Andromeda Galaxy, for example, was once referred to as the Andromeda Nebula (and spiral galaxies in general as spiral nebulae) before the true nature of galaxies … Read more

Kari’s law

Kari’s Law is a federal law in the United States that requires multi-line telephone systems to have a default configuration that allows direct dialing of 911 without having to first dial an access code, prefix, or other similar sequence of numbers or characters. The law is named after Kari Hunt, who was killed in 2013 … Read more