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User:Tomhubbard

Coordinates: 37°35′17″N 77°30′50″W / 37.58806°N 77.51389°W / 37.58806; -77.51389
From Wikipedia, the free encyclopedia

About Me

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I live in Richmond, Virginia in the United States of America and I like nuclear engineering, mathematics, computers, and guns.

64. Brigham Hubbard (1788-1838)
32. Erastus Willard Hubbard (1819-1902)
16. Willard Wright Hubbard (1854-1923)
33. Arabella Wright (1827-1914)
8. Willard Wright Hubbard, Jr. (1886-1969)
17. Josephine Spencer Niles (1858-1952)
4. Willard Wright Hubbard III (1915-1987)
9. Helen Motley (1887-1969)
2. William James Hubbard (1941-2020)
5. Sara Eloise Rast (1917-1993)
1. Thomas Richard Hubbard (1965-)
3. Barbara Jean Ockun (1943-)
GrandmaWillard Wright Hubbard III (1915-1987)
MomDadUncle John
My brother BillMe!My brother JimMy brother Greg

I am a former Senior Manager of Software Development at Amazon, where I managed the development of the amazon.com content selection and delivery software (i.e. Amabot). I also invented, designed, and developed the engineering of Amazon.com's behaviorial-targeted third-party display advertising product.

Favorite Math Equation

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Where:

Symbol Meaning Comments
Position vector (i.e. x,y,z)
Energy
Unit vector (solid angle) in direction of motion
Time
Neutron velocity vector
Angular neutron flux
Amount of neutron track length in a differential volume about , associated with particles of a differential energy in about , moving in a differential solid angle in about , at time .
Note integrating over all angles yields scalar neutron flux
Scalar neutron flux
Amount of neutron track length in a differential volume about , associated with particles of a differential energy in about , at time .
Average number of neutrons produced per fission (e.g., 2.43 for U-235).[1]
Probability density function for neutrons of exit energy from all neutrons produced by fission
Probability density function for neutrons of exit energy from all neutrons produced by delayed neutron precursors
Macroscopic total cross section, which includes all possible interactions
Macroscopic fission cross section, which includes all fission interactions in about
Double differential scattering cross section
Characterizes scattering of a neutron from an incident energy in and direction in to a final energy and direction .
Number of delayed neutron precursors
Decay constant for precursor i
Total number of precursor i in at time
Source term


Travels

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International

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Spent months to years: United States France
Days to weeks: Canada United Kingdom Tunisia Poland Italy Israel Germany Greece Republic of the Philippines Spain Switzerland South Korea Mexico
Just been through: Kenya Japan

U.S. States/Canadian Provinces

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Spent >4 years: New York Virginia California
1-4 years: Maryland Washington District of Columbia
Months: Florida Rhode Island Idaho Alabama
Days: Michigan Louisiana Missouri Ohio Colorado New Mexico Nevada Montana Pennsylvania Alaska Hawaii Tennessee Texas North Carolina South Carolina Georgia North Dakota Illinois New Jersey British Columbia
Just been through: Delaware Indiana New Hampshire West Virginia Kentucky Vermont Kansas Connecticut Ontario Massachusetts
  1. ^ "ENDF Libraries".