Search results
Results from the WOW.Com Content Network
Iontophoresis is a process of transdermal drug delivery by use of a voltage gradient on the skin. [1] [2] Molecules are transported across the stratum corneum by electrophoresis and electroosmosis and the electric field can also increase the permeability of the skin. [3] [4] These phenomena, directly and indirectly, constitute active transport ...
Elections took place on 22 October 1939; the official numbers reported participation of 93 percent of the electorate, 91 percent of whom supported the appointed candidates. On 30 October, the People's Assembly of Western Belarus session held in Belastok ( Polish Białystok ) affirmed the Soviet decision to join the Belarusian Soviet Socialist ...
In 1930, Lev Schnirelmann proved that any natural number greater than 1 can be written as the sum of not more than C prime numbers, where C is an effectively computable constant; see Schnirelmann density. Schnirelmann's constant is the lowest number C with this property. Schnirelmann himself obtained C < 800 000.
A large number like 9999 could thus be written with only four signs—combining the signs for 9000, 900, 90, and 9—as opposed to 36 hieroglyphs. Boyer saw the new hieratic numerals as ciphered, mapping one number onto one Egyptian letter for the first time in human history.
The Spanish Wikipedia ( Spanish: Wikipedia en español) is a Spanish-language edition of Wikipedia, a free online encyclopedia. It has 1,963,407 articles. Started in May 2001, it reached 100,000 articles on March 8, 2006, and 1,000,000 articles on May 16, 2013. It is the 8th-largest Wikipedia as measured by the number of articles and has the ...
Some sequences have alternate names: 4n+1 are Pythagorean primes, 4n+3 are the integer Gaussian primes, and 6n+5 are the Eisenstein primes (with 2 omitted). The classes 10 n + d ( d = 1, 3, 7, 9) are primes ending in the decimal digit d .
This section illustrates several systems for naming large numbers, and shows how they can be extended past vigintillion . Traditional British usage assigned new names for each power of one million (the long scale ): 1,000,000 = 1 million; 1,000,0002 = 1 billion; 1,000,0003 = 1 trillion; and so on. It was adapted from French usage, and is ...
In probability theory, the law of large numbers ( LLN) is a mathematical theorem that states that the average of the results obtained from a large number of independent random samples converges to the true value, if it exists. [1] More formally, the LLN states that given a sample of independent and identically distributed values, the sample ...