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R is a programming language for statistical computing and data visualization. It has been adopted in the fields of data mining, bioinformatics, and data analysis. [9] The core R language is augmented by a large number of extension packages, containing reusable code, documentation, and sample data. R software is open-source and free software.
Quadraphonic sound. Quadraphonic (or quadrophonic and sometimes quadrasonic) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space. The system allows for the reproduction of sound signals that are (wholly or in part) independent of one ...
Android 4.1 Jelly Bean was first unveiled at the Google I/O developer conference on June 27, 2012, with a focus on "delightful" improvements to the platform's user interface, along with improvements to Google's search experience on the platform (such as Knowledge Graph integration, and the then-new digital assistant Google Now), the unveiling of the Asus-produced Nexus 7 tablet, and the ...
The subsampling scheme is commonly expressed as a three-part ratio J:a:b (e.g. 4:2:2) or four parts, if alpha channel is present (e.g. 4:2:2:4), that describe the number of luminance and chrominance samples in a conceptual region that is J pixels wide and 2 pixels high. The parts are (in their respective order):
Android KitKat. Android KitKat is the codename for the eleventh Android mobile operating system, representing release version 4.4. Unveiled on September 3, 2013, KitKat focused primarily on optimizing the operating system for improved performance on entry-level devices with limited resources. The first phone with Android KitKat was the Nexus 5.
The first stable, non-beta version of Safari for Windows, Safari 3.1, [33] was offered as a free download on March 18, 2008. In June 2008, Apple released version 3.1.2, [ 34 ] [ 35 ] which addressed a security vulnerability in the Windows version where visiting a malicious web site could force a download of executable files and execute them on ...
Locke was born on 29 August 1632, in a small thatched cottage by the church in Wrington, Somerset, about 12 miles from Bristol. He was baptised the same day, as both of his parents were Puritans. Locke's father, also named John, was an attorney who served as clerk to the Justices of the Peace in Chew Magna [20] and as a captain of cavalry for ...
SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA) and first published in 2001. [3][4] They are built using the Merkle–Damgård construction, from a one-way compression function itself built using the Davies–Meyer structure from a specialized block cipher.