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2. Man-hour - Wikipedia

   en.wikipedia.org/wiki/Man-hour

   Labor is supply, money is demand. A man-hour or human-hour is the amount of work performed by the average worker in one hour. [1] [2] It is used for estimation of the total amount of uninterrupted labor required to perform a task. For example, researching and writing a college paper might require eighty man-hours, while preparing a family ...

3. Roman timekeeping - Wikipedia

   en.wikipedia.org/wiki/Roman_timekeeping

   Roman timekeeping. In Roman timekeeping, a day was divided into periods according to the available technology. Initially, the day was divided into two parts: the ante meridiem (before noon) and the post meridiem (after noon). With the introduction of the Greek sundial to Rome from the Samnites circa 293 BC, the period of the natural day from ...

4. Stepped reckoner - Wikipedia

   en.wikipedia.org/wiki/Stepped_reckoner

   The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1] The name comes from the translation of the German term for its operating mechanism, Staffelwalze ...

5. How Many Work Hours Are In A Year? Convert Your Hourly ... - AOL

   www.aol.com/many-hours-convert-hourly-wage...

   The average American works close to 40 hours per week, and there are 52 weeks in a year. Doing the math tells us that there are 260 work days (52 weeks x 5 days) and 2,080 work hours (52 weeks x ...

6. Standard time (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Standard_time_(manufacturing)

   The Standard Time is the product of three factors: Observed time: The time measured to complete the task. Performance rating factor: The number pace the person is working at. 90% is working slower than normal, 110% is working faster than normal, 100% is normal. This factor is calculated by an experienced worker who is trained to observe and ...

7. Longitude by chronometer - Wikipedia

   en.wikipedia.org/wiki/Longitude_by_chronometer

   Longitude by chronometer is a method, in navigation, of determining longitude using a marine chronometer, which was developed by John Harrison during the first half of the eighteenth century. It is an astronomical method of calculating the longitude at which a position line, drawn from a sight by sextant of any celestial body, crosses the ...