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Abacus-based mental calculation (AMC), which was derived from the abacus, is the act of performing calculations, including addition, subtraction, multiplication, and division, in the mind by manipulating an imagined abacus. It is a high-level cognitive skill that runs calculations with an effective algorithm.
In architecture, an abacus (from the Ancient Greek ἄβαξ (ábax), ' slab '; or French abaque, tailloir; pl.: abacuses or abaci) [1] is a flat slab forming the uppermost member or division of the capital of a column, above the bell.
The Roman abacus was the first portable calculating device for engineers, merchants, and presumably tax collectors.It greatly reduced the time needed to perform the basic operations of arithmetic using Roman numerals.
A suanpan (top) and a soroban (bottom). The two abaci seen here are of standard size and have thirteen rods each. Another variant of soroban. The soroban is composed of an odd number of columns or rods, each having beads: one separate bead having a value of five, called go-dama (五玉, ごだま, "five-bead") and four beads each having a value of one, called ichi-dama (一玉, いちだま ...
Crown moldings soften transitions between frieze and cornice and emphasize the upper edge of the abacus, which is the upper part of the capital. Roman Doric columns also have moldings at their bases and stand on low square pads or are even raised on plinths. In the Roman Doric mode, columns are not usually fluted; indeed, fluting is rare.
The abacus upon the capital has concave sides to conform to the outscrolling corners of the capital, and it may have a rosette at the center of each side. Corinthian columns were erected on the top level of the Roman Colosseum , holding up the least weight, and also having the slenderest ratio of thickness to height.
For example, he explained, if your benefit at full retirement age would be $24,000 a year, if you take the benefits at age 62 to 70, you’re getting 70% of the full retirement benefit, so around ...
The echinus is convex, or circular cushion like stone, and the abacus is a square slab of stone. Above the capital is a square abacus connecting the capital to the entablature. The entablature is divided into three horizontal registers, the lower part of which is either smooth or divided by horizontal lines.