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A commonly used model that illustrates the relationship between biological, individual, community, and societal determinants is Whitehead and Dahlgren's model originally presented in 1991 and subsequently adapted by the CDC. [8]
Dahlgren system and dahlgrenogram, created by Swedish-Danish botanist Rolf M. T. Dahlgren (1932–1987) USS Dahlgren (TB-9) , Torpedo Boat No. 9/TB-9/Coast Torpedo Boat No. 4 6945 Dahlgren (1980 FZ3), Main-belt Asteroid discovered on March 16, 1980 by Lagerkvist, C.-
Whitehead took as primitive the topological notion of "contact" between two regions, resulting in a primitive "connection relation" between events. Connection theory C is a first-order theory that distills the first 12 of Whitehead's 31 assumptions [9] into 6 axioms, C1-C6. [10]
Dahlgren is an unincorporated community and census-designated place (CDP) in King George County, Virginia, United States. The population was 2,946 at the time of the 2020 census, [ 3 ] up from 2,653 at the 2010 census, [ 4 ] and up from 997 in 2000.
Whitehead's algorithm is a mathematical algorithm in group theory for solving the automorphic equivalence problem in the finite rank free group F n. The algorithm is based on a classic 1936 paper of J. H. C. Whitehead. [1] It is still unknown (except for the case n = 2) if Whitehead's algorithm has polynomial time complexity.
The proving ground was named Dahlgren in honor of Rear Admiral John Adolphus Dahlgren, a Civil War Navy commander, who is the acknowledged "father of modern naval ordnance." John A. Dahlgren Prior to 1918, the Navy operated a proving ground at Indian Head, Maryland, but it became inadequate as advances in gun designs and ordnance made its range ...
X-inch Dahlgren shell gun (light): 10 were cast at Seyfert, McManus & Co. and West Point foundries between 1855 and 1864. Pivot mounted on board ships such as USS Cumberland, USS Brooklyn and USS Merrimack (pre-CSS Virginia) with a crew of 20 and a powderman. X-inch Dahlgren shell gun (heavy): 34 cast between 1862 and 1865. Designed from the ...
Whitehead developed his theory of gravitation by considering how the world line of a particle is affected by those of nearby particles. He arrived at an expression for what he called the "potential impetus" of one particle due to another, which modified Newton's law of universal gravitation by including a time delay for the propagation of gravitational influences.