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a bucket, usually with a toothed edge, to dig into the earth; a "dipper" or "dipper stick" connecting the bucket to the boom; a "boom" mounted on the rotating platform, supporting the dipper and its control wires; a boiler; a water tank and coal bunker; steam engines and winches; operator's controls; a platform on which everything is mounted
James Stuart (1767) authored the first book in English with 'political economy' in its title, explaining it just as: . Economy in general [is] the art of providing for all the wants of a family, so the science of political economy seeks to secure a certain fund of subsistence for all the inhabitants, to obviate every circumstance which may render it precarious; to provide everything necessary ...
Construction equipment being used to dig up rocky ground. Although humans are capable of digging in sand and soil using their bare hands, digging is often more easily accomplished with tools. The most basic tool for digging is the shovel. [1] In neolithic times and earlier, a large animal's scapula (shoulder blade) was often used as a crude ...
Also called resource cost advantage. The ability of a party (whether an individual, firm, or country) to produce a greater quantity of a good, product, or service than competitors using the same amount of resources. absorption The total demand for all final marketed goods and services by all economic agents resident in an economy, regardless of the origin of the goods and services themselves ...
Deep foundations of The Marina Torch, a skyscraper in Dubai. There are many reasons that a geotechnical engineer would recommend a deep foundation over a shallow foundation, such as for a skyscraper. Some of the common reasons are very large design loads, a poor soil at shallow depth, or site constraints like property lines.
A trial pit (or test pit) is an excavation of ground in order to study or sample the composition and structure of the subsurface, usually dug during a site investigation, a soil survey or a geological survey. Trial pits are dug before the construction. They are dug to determine the geology and the water table of that site.
Economics was the second Keynesian textbook in the United States, following the 1947 The Elements of Economics, by Lorie Tarshis.Like Tarshis's work, Economics was attacked by American conservatives (as part of the Second Red Scare, or McCarthyism), universities that adopted it were subject to "conservative business pressuring", and Samuelson was accused of Communism.
The front page quotes the motto of J. Willard Gibbs: "Mathematics is a language."The book begins with this statement: The existence of analogies between central features of various theories implies the existence of a general theory which underlies the particular theories and unifies them with respect to those central features.