index

Search Engine

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A search engine is a program that searches for and identifies items in a database that match specified criteria. Most web-based search engines work by sending out a spider to fetch as many documents as possible. Another program, called an indexer, then reads these documents and creates an index based on the words contained in … Read more

UV Index

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In 2006, the UltraViolet (UV) Index (UVI) was introduced as a way to help people protect themselves from UV radiation. The UV index is a number that represents the amount of UV radiation reaching the Earth’s surface. It is measured on a scale of 0 to 11+ and is based on the strength of the … Read more