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Room and pillar or pillar and stall is a variant of breast stoping. It is a mining system in which the mined material is extracted across a horizontal plane, creating horizontal arrays of rooms and pillars. To do this, "rooms" of ore are dug out while "pillars" of untouched material are left to support the roof – overburden.
First, if the board is anything other than the standard 40 space layout (9 per side plus 4 corners) you'll have to alter one or both of the variables spaces_horizontal and spaces_vertical. These correspond to the number of spaces between the corners. The template can handle as little as 1 and as many as 12 spaces per side.
Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6–6.0 m (2 ft 0 in – 19 ft 8 in) thick). The section of rock that is being mined, known as the longwall panel, is typically 3–4 km (1.9–2.5 mi) long, but can be up to 7.5 km (4.7 mi) long and 250–400 m (820–1,310 ft) wide.
The final layout of early ICs and PCBs was stored as a tape-out of Rubylith on transparent film. Gradually, electronic design automation automated more and more of the place-and-route work. At first, it merely sped up the process of making many small edits without spending a lot of time peeling up and sticking down the tape.
Ancient Egyptian pylons were often battered.. Walls may be battered to provide structural strength or for decorative reasons. In military architecture, they made walls harder to undermine or tunnel, and provided some defense against artillery, especially early siege engine projectiles and cannon, where the energy of the projectile might be largely deflected, on the same principle as modern ...
Batter boards (or battre boards, Sometimes mispronounced as "battle boads") are temporary frames, set beyond the corners of a planned foundation at precise elevations. These batter boards [1] are then used to hold layout lines (construction twine) to indicate the limits [2] (edges and corners) of the foundation.
Some had a five-, three-, or two-room layout, and sometimes the rooms were divided by additional walls into smaller areas. Acknowledging these sub-types of the four-room house, the popularity of the structure started at the beginning of Iron Age I (end of the eleventh century BCE) and dominated the architecture of Israel through Iron Age II ...
VLSI layout of an inverter circuit using Magic software. Magic is an electronic design automation (EDA) layout tool for very-large-scale integration (VLSI) integrated circuit (IC) originally written by John Ousterhout and his graduate students at UC Berkeley. Work began on the project in February 1983.