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The theoretical return period between occurrences is the inverse of the average frequency of occurrence. For example, a 10-year flood has a 1/10 = 0.1 or 10% chance of being exceeded in any one year and a 50-year flood has a 0.02 or 2% chance of being exceeded in any one year.
Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).
Fold change is a measure describing how much a quantity changes between an original and a subsequent measurement. It is defined as the ratio between the two quantities; for quantities A and B the fold change of B with respect to A is B/A. In other words, a change from 30 to 60 is defined as a fold-change of 2.
FIDE, however, calculates performance rating by means of the formula = +, where "rating difference" is based on a player's tournament percentage score , which is then used as the key in a lookup table where is simply the number of points scored divided by the number of games played.
The English name Switzerland is a portmanteau of Switzer, an obsolete term for a Swiss person which was in use during the 16th to 19th centuries, and land. [28] The English adjective Swiss is a loanword from French Suisse, also in use since the 16th century.
The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...
The English name of "Singapore" is an anglicisation of the native Malay name for the country, Singapura (pronounced), which was in turn derived from the Sanskrit word for 'lion city' (Sanskrit: सिंहपुर; romanised: Siṃhapura; Brahmi: 𑀲𑀺𑀁𑀳𑀧𑀼𑀭; literally "lion city"; siṃha means 'lion', pura means 'city' or 'fortress'). [9]
Climate change has a serious impact on the country. A third of food price rise in 2023 is attributed to climate change. [150] As of 2022, the United Kingdom is ranked 2nd out of 180 countries in the Environmental Performance Index. [151] A law has been passed that UK greenhouse gas emissions will be net zero by 2050. [152]