STI

STI may refer to:

In science and technology

Biology and psychology

Electronics and computing

Other uses in science and technology

STI International

STI International, Inc., is a Texas-based company that manufactures complete M1911 pistols and parts for competition, duty and self-defense. It is most well known for its "2011" modular frame guns (so-called because the lower grip and trigger guard, which is made of a fiber reinforced plastic, is a separate component from the metal upper portion of the frame that comprises the dust cover and frame rails). STI and Strayer Voigt Inc. share the patent on the modular frame.

History

In 1990, Virgil Tripp, a gunsmith and machinist, started building custom 1911s for competition use, especially USPSA/IPSC. After some time, Virgil began designing parts for 1911s, including electrical discharge machining (EDM) hammers and sears. Virgil's company was called Tripp Research, Inc. and most of his parts were sold and marketed by Chip McCormick, a champion pistol shooter, under his company's name, Chip McCormick Corporation (known as CMC).

Subaru Tecnica International

Subaru Tecnica International (スバルテクニカインターナショナル株式会社, Subaru Tekunika Intānashonaru Kabushiki-gaisha), or STI (prior to 2006, STi), is Fuji Heavy Industries' motorsports division. STI, along with Prodrive of the UK specialized in the preparation of a variety of vehicles for the Subaru World Rally Team which competed in the World Rally Championship (WRC). It was founded in 1988 by Fuji Heavy Industries, the parent company of Subaru, to promote the company's performance-oriented identity.

STI's signature color is "Cherry Blossom Red" (or "Rubine Red" as it is known in Australia.) It is seen as a masculine colour in Japanese culture.

STI special limited models

While Subaru offers many models with a trim level labeled "STI" or "Tuned by STI," there have been several special limited edition STI models.

STI was also known for its exceptional quality in producing cars designed for rally racing. Subaru discontinued its participation in the WRC in 2008.

AUF

AUF may refer to:

Gold pentafluoride

Gold(V) fluoride is the inorganic compound with the formula Au₂F₁₀. This fluoride compound features gold in its highest known oxidation state. This red solid dissolves in hydrogen fluoride but these solutions decompose, liberating fluorine.

The structure of gold(V) fluoride in the solid state is centrosymmetric with hexacoordinated gold and an octahedral arrangement of the fluoride centers on each gold center. It is the only known dimeric pentafluoride; other pentafluorides are monomeric (P, As, Sb, Cl, Br, I), tetrameric (Nb, Ta, Cr, Mo, W, Tc, Re, Ru, Os, Rh, Ir, Pt), or polymeric (Bi, V, U). In the gas phase, a mixture of dimer and trimer in the ratio 82:18 has been observed.

Gold pentafluoride is the strongest known fluoride ion acceptor, exceeding the acceptor tendency of even antimony pentafluoride.

Synthesis

Gold(V) fluoride can be synthesized by heating gold metal in an atmosphere of oxygen and fluorine to 370 °C at 8 atmospheres to form dioxygenyl hexafluoroaurate:

GCT 155mm

The GCT 155mm is a modern self-propelled artillery vehicle currently in use by the armies of France and Saudi Arabia. It replaced the former Mk F3 155mm in French Army service. The GCT 155mm's primary advancement is that it incorporates and provides full armor and nuclear-biological-chemical (NBC) protection for its crew of four, while the former Mk F3 155mm offered no protection and could carry only two of its four crew members. Though 60% heavier than the American M109, the GCT 155mm is faster, fires faster and incorporated a more sophisticated fire control system. The GCT 155mm saw combat with the Iraqi Army in the Iran–Iraq War.

History

Though the French Mk 3 155mm would remain in production through the 1980s, by the early 1970s the French Army realized there was an urgent need for its replacement. The Mk. 3 155mm lacked a traversable turret and nuclear-biological-chemical (NBC) protection for its crew, and could carry only two of the four crew members needed to operate it (the remaining two having to be transported in support vehicles). Development of the GCT 155mm began in the early 1970s, and the first production version, known as the AUF1, was introduced in 1977. About 400 have been produced, with 70 having been upgraded to the AUF2 variant.

USGS DEM

The USGS DEM standard is a geospatial file format developed by the United States Geological Survey for storing a raster-based digital elevation model. It is an open standard, and is used throughout the world. It has been superseded by the USGS's own SDTS format but the format remains popular due to large numbers of legacy files, self-containment, relatively simple field structure and broad, mature software support.

DEM Level

A USGS DEM can be classified into one of four levels of quality. This is due to the multiple methods of data collection, and certainty in the data.

Format Structure

The USGS DEM format is a self-contained (single file) set of ASCII-encoded (text) 1024-byte (1024 ASCII chars) blocks that fall into three record categories called A, B, and C. There is no cross-platform ambiguity since line ending control codes are not used, and all data including numbers is represented in readable text form. There is no known binary analogue of the format, although it is common practice to compress the files with gzip.