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  2. Radiocarbon calibration - Wikipedia

    en.wikipedia.org/wiki/Radiocarbon_calibration

    The calibration method also assumes that the temporal variation in 14 C level is global, such that a small number of samples from a specific year are sufficient for calibration, which was experimentally verified in the 1980s. [2] Over the next 30 years, many calibration curves were published by using a variety of methods and statistical ...

  3. Doomsday rule - Wikipedia

    en.wikipedia.org/wiki/Doomsday_rule

    A simple flowchart showing the Odd+11 method to calculate the anchor day. A simpler method for finding the year's anchor day was discovered in 2010 by Chamberlain Fong and Michael K. Walters, [12] and described in their paper submitted to the 7th International Congress on Industrial and Applied Mathematics (2011).

  4. Birkeland–Eyde process - Wikipedia

    en.wikipedia.org/wiki/Birkeland–Eyde_process

    It was developed by Norwegian industrialist and scientist Kristian Birkeland along with his business partner Sam Eyde in 1903, [2] based on a method used by Henry Cavendish in 1784. [ 3 ] [ 4 ] A factory based on the process was built in Rjukan and Notodden in Norway, combined with the building of large hydroelectric power facilities.

  5. Year 11 - Wikipedia

    en.wikipedia.org/wiki/Year_11

    Year 11 is an educational year group in schools in many countries including England and Wales, Northern Ireland, Australia and New Zealand. It is the eleventh or twelfth year of core education. For some Year 11 students it is their final year studying and may include final exams. In the US and Canada, it is referred to as tenth grade. Students ...

  6. Hill yield criterion - Wikipedia

    en.wikipedia.org/wiki/Hill_yield_criterion

    The quadratic Hill yield criterion for thin rolled plates (plane stress conditions) can be expressed as + (+) (+) + = where the principal stresses , are assumed to be aligned with the axes of anisotropy with in the rolling direction and perpendicular to the rolling direction, =, is the R-value in the rolling direction, and is the R-value perpendicular to the rolling direction.

  7. List of equations in classical mechanics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    Classical mechanics is the branch of physics used to describe the motion of macroscopic objects. [1] It is the most familiar of the theories of physics. The concepts it covers, such as mass, acceleration, and force, are commonly used and known. [2]

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. MACRS - Wikipedia

    en.wikipedia.org/wiki/MACRS

    Special rules apply for pro rating deductions for short tax years and for the first year of business, or where more than 40% of tangible personal property additions are in the final quarter of the year. [5] The method and life used in depreciating an asset is an accounting method, change of which requires IRS approval. [6]