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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]
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Following a chance discovery in 1963, reserve U.S. Air Force major William O'Dwyer was asked to research Whitehead's claims. He became convinced that Whitehead did fly and contributed research material to a second book by Stella Randolph, The Story of Gustave Whitehead, Before the Wrights Flew, published in 1966. [24] [25]
The Mark 1 guidance component included the Pendulum-and-hydrostat control device which was called the "Whitehead Secret". This version of the Whitehead torpedo lacked the gyroscope gear designed by Ludwig Obry, which was incorporated in a later Whitehead model, the Mark 3. The Mark 1 was launched from battleships and torpedo boats.
Spoiler alert! This story contains major details about the plot and ending of "The Nickel Boys" (now showing in New York theaters, opening in Los Angeles Dec. 20 and releasing wide in January).
Glucagon-like peptide-1 receptor agonists (GLP-1) drugs are a class of medications used to manage type 2 diabetes and treat obesity. While many drugs in this class are relatively new, researchers ...
The US Navy Ordnance Department under Rear Admiral John A. Dahlgren awarded Wiard a contract to produce two 15 in (381 mm) rifled guns of about the same weight as the smoothbore XV-inch (381 mm) Dahlgren shell gun. Wiard was to be paid $10,750 in 1860s money for each gun. The result was probably one of the most complex guns ever cast in one piece.
One of the modern systems of plant taxonomy, the Dahlgren system was published by monocot specialist Rolf Dahlgren in 1975 [1] and revised in 1977, [2] and 1980. [3] However, he is best known for his two treatises on monocotyledons in 1982 [4] and revised in 1985. [5] His wife Gertrud Dahlgren continued the work after his death. [6]