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Later, when the beads were made of polyethylene, it became possible to fuse them with a flat iron. HAMA began producing pegboard beads in 1971, but they only became fusible by the late 70s. [9] Peter Schneck and Dee Dee Schneck founded the Perler brand of fuse bead in 1981 in California, [10] and the beads gained popularity during the 1980s. [4]
The AKF diagram is intended for rocks containing excess aluminium and silica. Its components are: A = Al 2 O 3 - (CaO + Na 2 O + K 2 O) K = K 2 O F = FeO + MgO + MnO. This diagram is less useful, because magnesium does not freely substitute for ferrous iron in many metamorphic minerals important in aluminium-rich rock.
An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their earliest designs, the beads could be loose on a flat surface or sliding in grooves. Later the beads were made to slide on rods and built into a frame, allowing faster manipulation.
The suanpan is a 2:5 abacus: two heaven beads and five earth beads. If one compares the suanpan to the soroban which is a 1:4 abacus, one might think there are two "extra" beads in each column. In fact, to represent decimal numbers and add or subtract such numbers, one strictly needs only one upper bead and four lower beads on each column.
The Late Roman hand abacus shown here as a reconstruction contains seven longer and seven shorter grooves used for whole number counting, the former having up to four beads in each, and the latter having just one. The rightmost two grooves were for fractional counting. The abacus was made of a metal plate where the beads ran in slots.
Abacus seeds (Chinese: 算盘子) or abacus beads is a Hakka Chinese dish consisting of dimpled, disc-shaped dumplings made with taro and tapioca flour. The dumplings are boiled then stir-fried with minced pork, shiitake or wood ear mushrooms , dried shrimp , dried cuttlefish and firm bean curd .
Gimzewski's nano-abacus consists of stable rows containing ten molecules acting as railings. The beads are made up of buckminsterfullerene constrained by one-atom-high ridges on a copper sheet and are pushed around by the tip of a scanning tunneling microscope at room temperature to create a calculation and allow it be viewed when operated in ...
The following other wikis use this file: Usage on ar.wikipedia.org حديد; مخطط بوربيه; Usage on arz.wikipedia.org حديدوز; Usage on bn.wikipedia.org