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A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
The Sod shock tube problem, named after Gary A. Sod, is a common test for the accuracy of computational fluid codes, like Riemann solvers, and was heavily investigated by Sod in 1978. The test consists of a one-dimensional Riemann problem with the following parameters, for left and right states of an ideal gas .
Alchemical symbols were used to denote chemical elements and compounds, as well as alchemical apparatus and processes, until the 18th century. Although notation was partly standardized, style and symbol varied between alchemists.
Cost of goods sold (COGS) (also cost of products sold (COPS), or cost of sales [1]) is the carrying value of goods sold during a particular period. Costs are associated with particular goods using one of the several formulas, including specific identification, first-in first-out (FIFO), or average cost.
Superoxide dismutase (SOD) mimetics are synthetic compounds that mimic the native superoxide dismutase enzyme. [1] SOD mimetics effectively convert the superoxide anion (O − 2 ), a reactive oxygen species , into hydrogen peroxide , which is further converted into water by catalase . [ 2 ]
System of a Down is an Armenian-American heavy metal band formed in Glendale, California, in 1994.Since 1997, the band has consisted of founding members Serj Tankian (lead vocals, keyboards); Daron Malakian (guitar, vocals); Shavo Odadjian (bass, backing vocals); along with John Dolmayan (drums), who replaced original drummer Andy Khachaturian in 1997.
A sod roof, or turf roof, is a traditional Scandinavian type of green roof covered with sod on top of several layers of birch bark on gently sloping wooden roof boards. Until the late 19th century, it was the most common roof on rural log houses in Norway and large parts of the rest of Scandinavia.
Sod blocks in upper portion of north wall of Dowse house. Before the sod blocks were cut, the grass was mown short or burned off. At times, the surface was scored with a cutter or disc; the blocks could then be removed with a spade. This approach, however, tended to produce rough and non-uniform blocks, which complicated the task of laying them ...