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McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
An enclosure in which a gaseous fuel is burned. Domestic heating systems may have gas furnaces. Some industrial power plants are fired with gases that remain as a by-product of other plant processes. Utility power stations may use gas as an alternate fuel to oil or coal, depending on relative cost and availability. Some heating processes are carried out in gas-fired furnaces.
Industry:Science
An enclosure treated acoustically to provide controlled recording of music or speech. Professional sound-recording studios range from small home studios (such as a converted garage or basement) to large facilities using state-of-the-art equipment. They consist of two rooms, the main studio or stage (performance area) and the audio control room. The stage includes one or more microphones, is acoustically isolated to ensure that external sounds do not interfere with the recording, and can be broken up into small booths to separate individual performers. The audio control room contains the mixing console and recording devices.
Industry:Science
An end product of purine metabolism in humans and higher primates. Uric acid is excreted as such in the urine, and it is very poorly soluble in aqueous solutions, causing it to crystallize when concentrations of the compound in the urine are abnormally high. This leads to crystalluria (excretion of crystals in urine), hematuria (blood in the urine), infection, or urinary tract stones. Other mammals do not experience these problems, as they express an enzyme, uricase, which catalyzes the conversion of uric acid to allantoin, which is highly soluble. A nonprimate exception is the Dalmatian dog, in which high rates of excretion of uric acid are a consequence of defective renal tubular reabsorption; thus, the uric acid is excreted before it can be oxidized. In birds and reptiles, uric acid is an excretory end product of the metabolism of proteins.
Industry:Science
An endocrine organ usually associated with the thyroid gland. Embryologically, the glandular primordia are formed in the endoderm of the third and fourth pharyngeal pouches and are associated with the similarly derived primordia of the thymus. There may be from one to three pairs of the small glands present in individuals of the various vertebrate classes, although two pairs appear most frequently. They are characteristically within, on, or near the thyroid gland. In response to lowered serum calcium concentration, a hormone is produced which promotes bone destruction and inhibits the phosphorus-conserving activity of the kidneys.
Industry:Science
An endophyte is an organism, usually a fungus or bacterium, that lives inside a plant during most or all of its life cycle. Many grass species contain endophytic fungi belonging to the order Ascomycetes (family Clavicipitaceae, tribe Balansieae). Endophytes of the genus <i>Balansia</i> are found in various warm-season grass genera such as bluestems (<i>Andropogon</i>), lovegrasses (<i>Eragrostis</i>), and dallisgrass and bahiagrass (<i>Paspalum</i>). Endophytes of the genus <i>Epichloe</i> and its asexual descendant <i>Neotyphodium</i> are found in the cool-season grasses—bentgrasses (<i>Agrostis</i>), fescues (<i>Festuca</i>), ryegrasses (<i>Lolium</i>), and bluegrasses (<i>Poa</i>).
Industry:Science
An energy radiator which has a blackbody energy distribution, reduced by a constant factor, throughout the radiation spectrum or within a certain wavelength interval. The designation “gray” has no relation to the visual appearance of a body but only to its similarity in energy distribution to a blackbody. Most metals, for example, have a constant emissivity within the visible region of the spectrum and thus are graybodies in that region. The graybody concept allows the calculation of the total radiation intensity of certain substances by multiplying the total radiated energy (as given by the Stefan-Boltzmann law) by the emissivity. The concept is also quite useful in determining the true temperatures of bodies by measuring the color temperature. For a discussion of the Stefan-Boltzmann law and color temperature
Industry:Science
An engine that propels a waterborne vessel. In all except the smallest boats, the engine is but part of an integrated power plant, which includes auxiliary machinery for propulsion engine support, ship services, and cargo, trade, or mission services. Marine engines in common use are diesel engines, steam turbines, and gas turbines. Gasoline engines are widely used in pleasure craft. Only the propulsion engine will be discussed in this article.
Industry:Science
An engineering discipline concerned with the design of ships, boats, drill rigs, submarines, and other floating or submerged craft. The naval architect creates the initial overall concept for a new ship, integrates the work of other specialists as the ship design is developed, and is specifically responsible for the hull and superstructure shape, general arrangements, structural design, weights and centers calculations, stability analysis, hydrodynamic performance assessments, propeller and rudder design, and the arrangement and outfit of all living and working spaces, other than machinery spaces. The naval architect's ally, the marine engineer, is responsible for the design of the propulsion plant, the electric plant, and other ship machinery and mechanical systems, including the so-called distributive systems: electric cabling, piping, and ventilation system ducting. The marine engineer also is responsible for ship control systems, including propulsion and electric plant controls and the steering system.
Industry:Science
An enhanced coupling between quantum states with the same energy. The concept of resonance in quantum mechanics is closely related to resonances in classical physics.
Industry:Science
An enigmatic group of fossil plants, in mid-Silurian to lower Upper Devonian rocks, composed of intertwined, branching tubes of two sizes, 10–50 and 1–10 micrometers in diameter.
Industry:Science
