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# Brinell hardness test – using a 10 mm steel ball ;
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# and Brinell
# and hardness
# Nuclear hardness is determined for specified or actual quantified environmental conditions and physical parameters, such as peak radiation levels, overpressure, velocities, energy absorbed, and electrical stress.
# and test
# Test that F ≠ N, that F divides N ( time complexity O ( log N )), and that F is prime ( polynomial time ; see AKS primality test ).
Ivy Mike, the first full test of the Teller – Ulam design ( a Nuclear weapon design # Two-stage thermonuclear weapons | staged fusion bomb ), with a TNT equivalent | yield of 10. 4 megatons ( November 1, 1952 )
# using a stable optical source, at the wavelength of interest, to drive a mode scrambler, the output of which overfills ( drives ) a 1 to 2 meter long reference fiber having physical and optical characteristics matching those of the fiber under test,
# subtracting the power level obtained at the output of the fiber under test from the power level obtained at the output of the reference fiber, to get the transmission loss of the fiber under test.
# The DNA is placed in test tubes containing caesium chloride ( heavy compound ) and centrifuged at 40, 000 revolutions per minute.
# and –
* 1961 – Motown releases what would be its first # 1 hit, " Please Mr. Postman " by The Marvelettes.
# Siegfried ( died 24 October 1184 ), Bishop of Brandenburg from 1173 – 1180, Prince-Archbishop of Bremen, the first ranked prince, from 1180 – 1184
# Alexander, Prince of Scotland ( 21 January 1264 Jedburgh – 28 January 1284 Lindores Abbey ); buried in Dunfermline Abbey
# 1. around 1200: Gertrude of Merania ( 1185 – 8 September 1213 ), a daughter of Berthold IV, Duke of Merania and his wife, Agnes of Wettin
# Bourgogne of Lusignan ( 1176 – 1180 or c. 1178 – c. 1210 ), married as his third wife Raymond VI of Toulouse 1193, repudiated and divorced 1194 or 1196 without issue, married Gauthier I de Montfaucon aka Walter of Montbéliard ( killed in action at the Battle of Satalia, June 20, 1212 ) 1197 or bef.
# Héloise / Helvis of Lusignan ( c. 1190 – 1216 – 1219, 1216 / 1219 or c. 1217 ), married firstly c. 1205 Eudes de Dampierre sur Salon, Lord of Chargey-le-Grey, div.
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