منابع مشابه
One in a million.
Thirty-six years ago, I was the first Cobra Pilot to shake the hand of a surviving Cobra Pilot who lost his tail rotor assembly while on a Hunter-Killer mission in South Vietnam. It was a hot, humid day at Quan Loi. I was an in-country trained Cobra maintenance officer for A Troop 3/ 17 Air Cav and Operation Lam Son 719 had been underway for weeks. The siren went off, which meant one of our Hel...
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Web 2.0 users engage in collaborative activities. Many 2.0 websites allow their users to associate words (a.k.a. tags) with the users’ own and with other users’ content. The result is an additional layer with descriptions of web resources. The created associations between tag sets and web resources are used to facilitate social navigation, individual resource re-finding, defining communities of...
متن کاملRadiographic indices in one hundred fifty normal Iranian wrists
Abstract Background: Radiography is the most widely available imaging modality. Precise evaluations of wrist x-ray can help diagnosis and evaluate the prognosis of many wrist disorders. Methods: We measured length, angles and indices in 150 posteroanterior and lateral wrist x-rays to determine normal dimensions and variations according to age and sex. All x-rays were made with standar...
متن کاملLandau’s function for one million billions
Let Sn denote the symmetric group with n letters, and g(n) the maximal order of an element of Sn. If the standard factorization of M into primes is M = q1 1 q α2 2 . . . q αk k , we define l(M) to be q α1 1 + q α2 2 + . . .+ q αk k ; one century ago, E. Landau proved that g(n) = maxl(M)≤n M and that, when n goes to infinity, log g(n) ∼ √ n log(n). There exists a basic algorithm to compute g(n) ...
متن کاملCyclotomic Invariants for Primes to One Million
Our recent computation of cyclotomic invariants for primes between 125000 and 150000 was extended to one million. No new phenomena appear. This note is a sequel to our recent report [2] on the computation of certain cyclotomic invariants for primes p between 125000 and 150000. That work was based on the table of irregular primes supplied by Tanner and Wagstaff (see [4]). Meanwhile, the extensio...
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ژورنال
عنوان ژورنال: The Journal of the American Dental Association
سال: 2015
ISSN: 0002-8177
DOI: 10.1016/j.adaj.2015.06.003