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Creola Katherine Johnson (née Coleman; August 26, 1918 – February 24, 2020) was an American mathematician whose calculations of orbital mechanics as a NASA employee were critical to the success of the first and subsequent U.S. crewed spaceflights. [1][2] During her 33-year career at NASA and its predecessor, she earned a reputation for ...
Flextime (also spelled flexitime or flex-time) is a flexible hours schedule that allows workers to alter their workday and adjust their start and finish times. [1] In contrast to traditional [2] work arrangements that require employees to work a standard 9 a.m. to 5 p.m. day, Flextime typically involves a "core" period of the day during which employees are required to be at work (e.g., between ...
Working time or laboring time is the period of time that a person spends at paid labor. Unpaid labor such as personal housework or caring for children or pets is not considered part of the working week. Many countries regulate the work week by law, such as stipulating minimum daily rest periods, annual holidays, and a maximum number of working ...
When I was a kid, my mom bragged endlessly about the refrigerator we had been using for 20 years, her 15-year-old vacuum cleaner and the washing machine that had been around since before she had ...
Calendrical calculation. A calendrical calculation is a calculation concerning calendar dates. Calendrical calculations can be considered an area of applied mathematics. Some examples of calendrical calculations: Converting a Julian or Gregorian calendar date to its Julian day number and vice versa (see § Julian day number calculation within ...
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The Doomsday rule, Doomsday algorithm or Doomsday method is an algorithm of determination of the day of the week for a given date. It provides a perpetual calendar because the Gregorian calendar moves in cycles of 400 years. The algorithm for mental calculation was devised by John Conway in 1973, [1][2] drawing inspiration from Lewis Carroll 's ...
t. e. Paid time off, planned time off, or personal time off (PTO), is a policy in some employee handbooks that provides a bank of hours in which the employer pools sick days, vacation days, and personal days that allows employees to use as the need or desire arises. This policy pertains mainly to the United States, where there are no federal ...