TAC (building automation)

TAC is a Swedish-based building automation company in the fields of both energy solutions and security. It also operates in other countries including the United Kingdom and the USA and was originally established as Tour Agenturer in 1925 in Stockholm. TAC has announced a name change to Schneider Electric, its parent company, to take place in October 2009.

History

1925–1995

Founded as Tour Agenturer in Stockholm in 1925, the company produced a product range focusing particularly on draught regulators and radiator valves. It continued to develop its product range introducing the first transistorized heating regulator in 1962 and . a computer-based system for climate control in 1974. Tour Agenturer became Tour & Andersson in 1977 following a merger with AH Andersson.

Over the following years, Tour & Andersson extend its product range to include an integrated access control system and hotel management and signal system in 1980 and 1981 respectively. In 1987 it released Micro 7, an IBM PC-based control system with an easier user interface than previously available and operated with a mouse in a similar fashion to modern day computers.

Building (mathematics)

In mathematics, a building (also Tits building, Bruhat–Tits building, named after François Bruhat and Jacques Tits) is a combinatorial and geometric structure which simultaneously generalizes certain aspects of flag manifolds, finite projective planes, and Riemannian symmetric spaces. Initially introduced by Jacques Tits as a means to understand the structure of exceptional groups of Lie type, the theory has also been used to study the geometry and topology of homogeneous spaces of p-adic Lie groups and their discrete subgroups of symmetries, in the same way that trees have been used to study free groups.

Overview

The notion of a building was invented by Jacques Tits as a means of describing simple algebraic groups over an arbitrary field. Tits demonstrated how to every such group G one can associate a simplicial complex Δ = Δ(G) with an action of G, called the spherical building of G. The group G imposes very strong combinatorial regularity conditions on the complexes Δ that can arise in this fashion. By treating these conditions as axioms for a class of simplicial complexes, Tits arrived at his first definition of a building. A part of the data defining a building Δ is a Coxeter group W, which determines a highly symmetrical simplicial complex Σ = Σ(W,S), called the Coxeter complex. A building Δ is glued together from multiple copies of Σ, called its apartments, in a certain regular fashion. When W is a finite Coxeter group, the Coxeter complex is a topological sphere, and the corresponding buildings are said to be of spherical type. When W is an affine Weyl group, the Coxeter complex is a subdivision of the affine plane and one speaks of affine, or Euclidean, buildings. An affine building of type is the same as an infinite tree without terminal vertices.

Building (disambiguation)

A building is a constructed object intended for occupancy by humans or animals.

Building may also refer to:

See also

Online creation

Online creation, also referred to as OLC, online coding, online building, and online editing, is a software feature of MUDs that allows users to edit a virtual world from within the game itself. In the absence of online creation, content is created in a text editor or level editor, and the program generally requires a restart in order to implement the changes.

Online creation as original content

An aspect of online creation that separates it from "mere game play" is that online creation systems can generally be used to create new content — new objects, new locations, new creatures — rather than simply creating instances of predefined items in the game world. Some have observed that certain forms of online creation — notably those associated with creating new commands — can threaten the stability of the server.

History

Origins

The first publicly available MUD that featured in-game creation of the game world was Skrenta's 1988 Monster.

Goa'uld technology in Stargate

This is a list of Goa'uld technologies in the Stargate franchise. The Goa'uld are the main adversaries for most of the run of Stargate SG-1. They scavenged or conquered most of their advanced technologies from other races. However, there are innovators amongst the Goa'uld; Anubis and Ba'al in particular have been depicted with a great deal of technological ingenuity. Rather than being designed as practical, many Goa'uld devices, such as the staff weapon, are designed to have higher visual impact, meant to intimidate and reinforce their position as gods to their followers. Some pieces of Goa'uld technology, such as the hand device and the healing device, respond only to mental commands and require naqahdah in the bloodstream of the user to operate.

Cloaking and shielding

GNU Core Utilities

The GNU Core Utilities or coreutils is a package of GNU software containing reimplementations for many of the basic tools, such as cat, ls, and rm, used on Unix-like operating systems. It is a combination of a number of earlier packages, including textutils, shellutils, and fileutils, along with some other miscellaneous utilities.

GNU coreutils capabilities

The GNU core utilities support long options as parameters to the commands, as well as (unless the POSIXLY_CORRECT environment variable is set) the relaxed convention allowing options even after the regular arguments. Note that this environment variable enables a different functionality in BSD.

Programs included in coreutils

See also

References

External links

McMillan Tac-50

The McMillan Tac-50 sniper rifle is produced in Phoenix, Arizona in the United States by McMillan Firearms Manufacturing. This long-range anti-material/anti-personnel weapon is based on previous designs from the same company, which first appeared during the late 1980s. McMillan makes several versions of .50 caliber rifles, based on the same proprietary action, for military, law enforcement and civilian use.

The Tac-50 is a military and law enforcement weapon, which, designated as the C15, is the standard Long Range Sniper Weapon (LRSW) of the Canadian Forces since 2000. Rifles of the Tac-50 family are capable of outstanding accuracy and guaranteed to provide 0.5 MOA groups with match grade ammunition.

Design details

The McMillan Tac-50 is a manually operated, rotary bolt-action rifle. The large bolt has dual front locking lugs, and its body has spiral flutes to reduce weight. The heavy match-grade barrel, made by Lilja barrels, is also fluted to dissipate heat quickly and reduce overall weight and fitted with an effective muzzle brake to reduce recoil. The rifle is fed from detachable box magazines, holding 5 rounds each. The stock is made from fiberglass by McMillan Stocks, and is designed to be used from a bipod only. The buttstock is adjustable for length of pull with rubber spacers, and can be removed for compact storage. The rifle has no open sights and can be used with a variety of telescopic or night sights.