ARC (file format)

ARC is a lossless data compression and archival format by System Enhancement Associates (SEA). It was very popular during the early days of networked dial-up BBS. The file format and the program were both called ARC. The ARC program made obsolete the previous use of a combination of the SQ program to compress files and the LU program to create .LBR archives, by combining both compression and archiving functions into a single program. Unlike ZIP, ARC is incapable of compressing entire directory trees. The format was subject to controversy in the 1980s—an important event in debates over what would later be known as open formats.

The .arc file extension is often used for several file archive-like file types. For example, the Internet Archive uses its own ARC format to store multiple web resources into a single file. The FreeArc archiver also uses .arc extension, but uses a completely different file format.

Nintendo uses an unrelated 'ARC' format for resources, such as MIDI, voice samples, or text, in GameCube and Wii games. Several unofficial extractors exist for this type of ARC file.

Arc (projective geometry)

A (simple) arc in finite projective geometry is a set of points which satisfies, in an intuitive way, a feature of curved figures in continuous geometries. Loosely speaking, they are sets of points that are far from "line-like" in a plane or far from "plane-like" in a three-dimensional space. In this finite setting it is typical to include the number of points in the set in the name, so these simple arcs are called k-arcs. An important generalization of the k-arc concept, also referred to as arcs in the literature, are the (k, d)-arcs.

k-arcs in a projective plane

In a finite projective plane π (not necessarily Desarguesian) a set A of k (k ≥ 3) points such that no three points of A are collinear (on a line) is called a k - arc. If the plane π has order q then k ≤ q + 2, however the maximum value of k can only be achieved if q is even. In a plane of order q, a (q + 1)-arc is called an oval and, if q is even, a (q + 2)-arc is called a hyperoval.

Every conic in the Desarguesian projective plane PG(2,q), i.e., the set of zeros of an irreducible homogeneous quadratic equation, is an oval. A celebrated result of Beniamino Segre states that when q is odd, every (q + 1)-arc in PG(2,q) is a conic. This is one of the pioneering results in finite geometry.

Directed graph

In mathematics, and more specifically in graph theory, a directed graph (or digraph) is a graph, or set of vertices connected by edges, where the edges have a direction associated with them. In formal terms, a directed graph is an ordered pair G = (V, A) (sometimes G = (V, E)) where

It differs from an ordinary or undirected graph, in that the latter is defined in terms of unordered pairs of vertices, which are usually called edges, arcs, or lines.

A directed graph is called a simple digraph if it has no multiple arrows (two or more edges that connect the same two vertices in the same direction) and no loops (edges that connect vertices to themselves). A directed graph is called a directed multigraph or multidigraph if it may have multiple arrows (and sometimes loops). In the latter case the arrow set forms a multiset, rather than a set, of ordered pairs of vertices.

Clyde Drexler

Clyde Austin "The Glide" Drexler (born June 22, 1962) is an American retired professional basketball swingman. During his career, he was a ten-time All-Star, and named one of the 50 Greatest Players in NBA History. Drexler won an Olympic gold medal in 1992 as part of the 1992 United States men's Olympic basketball team ("The Dream Team") and an NBA Championship in 1995 with the Houston Rockets. He is a two-time Naismith Memorial Basketball Hall of Fame inductee (being inducted 2004 for his individual career, and in 2010 as a member of the "Dream Team") He currently serves as a color commentator for Rockets home games.

Early years

Born in New Orleans, Louisiana, Drexler lived in the South Park area in Houston, Texas, and attended Ross Sterling High School in Houston, where he was a classmate of tennis player Zina Garrison. As a sophomore, he made the varsity baseball team, and of course tried out for the basketball team but failed to make the cut. Drexler played as a 6 ft 6 in (1.98 m) center as a senior. He began receiving attention from college coaches following a 34-point, 27-rebound performance against Sharpstown High School during a 1979 Christmas tournament.

Bates Turkey Farm

Coordinates: 31°57′55.46″N 86°29′12.99″W / 31.9654056°N 86.4869417°W / 31.9654056; -86.4869417

Bates Turkey Farm is a domestic turkey producer founded in 1923 and based near Fort Deposit, Alabama (about thirty miles south of Montgomery, in Lowndes County). A wedding gift of nine turkey eggs was the start of the operation.

The farm is on approximately 900 acres (360 ha) of land and raises free-range turkeys (about 60,000 in 2008) under pecan trees on about 30 of those acres. The farm purchases poults (baby turkeys) from a hatchery in Oakwood, Ohio. The turkeys are fed a diet of "freshly ground corn, oats and soybean meal, along with some vitamins" and each "needs 70 pounds of grain to reach slaughter size". The Bates Farm services customers from a wide range of locations, including many that are far-flung, including California, Oregon, and Alaska. Because it is cheaper to raise turkeys in the Mid-West, nearer where the grain they eat is grown, other turkey farms in the state have gone out of business, leaving Bates as the sole remaining in Alabama, which once had 150 turkey growers. Turkey prices are highly dependent on feed costs—in 2011 Bates had to double his prices after corn got more expensive.

Clyde (1819 ship)

The Clyde was a 490-ton merchant ship built at Greenock, Scotland in 1819. She made three voyages transporting convicts from England and Ireland to Australia.

Career

On her first convict voyage, under the command of Daniel Munro and surgeon Morgan Price, she departed Portsmouth on the 30 August 1830, with 216 male convicts. She arrived in Hobart Town on the 18 December 1830. There were no convict deaths en route. The second convict voyage, under the command of Daniel Munro and surgeon George Fairfowl, she departed Portsmouth on 9 May 1832 with 200 male convicts. She arrived in Sydney on 27 August 1832 and had one convict death en route.

On her third convict voyage, under the command of John Matches and surgeon John Smith, she departed Dublin, Ireland on the 11 May 1838, with 215 male convicts. She arrived in Sydney on the 10 September 1838. There were no convict deaths en route. Clyde departed Port Jackson, bound for Java on 9 October 1838.

Citations

References