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Zhou Enlai print that pageTimeline of Zhou Enlai


A skilled and able diplomat, Zhou served as the Chinese foreign minister from 1949 to 1958. Advocating peaceful coexistence with the West after the stalemated Korean War , he participated in the 1954 Geneva Conference and helped orchestrate Richard Nixon's 1972 visit to China . He helped

Gas tungsten arc welding print that page


GTAW is most commonly used to weld thin sections of stainless steel and non-ferrous metals such as aluminum , magnesium , and copper alloys. The process grants the operator greater control over the weld than competing processes such as shielded metal arc welding and gas metal arc welding

London Necropolis Company print that page


The London Necropolis Company (LNC), formally the London Necropolis & National Mausoleum Company until 1927, [ note 1 ] was a cemetery operator established by Act of Parliament in 1852 in reaction to the crisis caused by the closure of London's graveyards in 1851. The LNC intended to

Theory of Constraints print that page

The analytic approach with TOC comes from the contention that any manageable system is limited in achieving more of its goals by a very small number of constraints, and that there is always at least one constraint. Hence the TOC process seeks to identify the constraint and restructure the rest | 2011/7/21 22:45:42

Censorship in the United States print that page


In general, freedom of speech is considered an integral American value, as protected by the First Amendment to the United States Constitution . This freedom, though fundamental, has also been accompanied since its enshrinement with contest and controversy. For instance, restraints increased

Operational amplifier print that page


An operational amplifier ("op-amp") is a DC - coupled high- gain electronic voltage amplifier with a differential input and, usually, a single-ended output. [ 1 ] An op-amp produces an output voltage that is typically hundreds of thousands times larger than the voltage difference between

Tractor print that page


A tractor is a vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery used in agriculture or construction . Most commonly, the term is used to describe a farm vehicle that provides the power and traction

Artillery print that page


Originally applied to any group of infantry primarily armed with projectile weapons, artillery has over time become limited in meaning to refer only to those engines of war that operate by projection of munitions far beyond the range of effect of personal weapons. These engines comprise

Coupling (railway) print that page


A coupling (or a coupler ) is a mechanism for connecting rolling stock in a train. The design of the coupler is standard, and is almost as important as the railway gauge , since flexibility and convenience are maximised if all rolling stock can be coupled together. The equipment that connects

Two-factor authentication print that page


Two-factor authentication is commonly found in electronic computer authentication, where basic authentication is the process of a requesting entity presenting some evidence of its identity to a second entity. Two-factor authentication seeks to decrease the probability that the requestor is