Congo Basin

The Congo Basin is the sedimentary basin of the Congo River, located in west equatorial Africa. The broad region is sometimes known simply as the Congo.

The basin begins in the highlands of the East African Rift system with input from the Chambeshi River, the Uele and Ubangi Rivers in the upper reaches and the Lualaba River draining wetlands in the middle reaches. Due to the young age and active uplift of the East African Rift at the headlands, the river's yearly sediment load is very large but the drainage basin occupies large areas of low relief throughout much of its area. The basin is a total of 3.7 million square kilometers and is home to some of the largest undisturbed stands of tropical rainforest on the planet, in addition to large wetlands. The basin ends where the river empties its load in the Gulf of Guinea on the Atlantic Ocean. The climate is equatorial tropical, with two rainy seasons including very high rainfalls, and high temperature year round. The basin is home to the endangered western lowland gorilla.

Agkistrodon piscivorus

Agkistrodon piscivorus is a venomous snake, a species of pit viper, found in the southeastern United States. Adults are large and capable of delivering a painful and potentially fatal bite. When antagonized, they will stand their ground by coiling their bodies and displaying their fangs. Although their aggression has been exaggerated, individuals may bite when feeling threatened or being handled. This is the world's only semiaquatic viper, usually found in or near water, particularly in slow-moving and shallow lakes, streams, and marshes. The snake is a strong swimmer and will even enter the sea. It has successfully colonized islands off both the Atlantic and Gulf coasts.

The generic name is derived from the Greek words ancistro (hooked) and odon (tooth), and the specific name comes from the Latin piscis (fish) and voro (to eat); thus, the scientific name translates into “hooked-tooth fish-eater”. Common names include variants on water moccasin, swamp moccasin, black moccasin, cottonmouth, gapper, or simply viper. Many of the common names refer to the threat display, where this species will often stand its ground and gape at an intruder, exposing the white lining of its mouth. Three subspecies are currently recognized, including the nominate subspecies described here. Its diet consists mainly of fish and frogs but is otherwise highly varied and, uniquely, has even been reported to include carrion.

Congo (BBC TV series)

Congo is a 2001 BBC nature documentary series for television on the natural history of the Congo River of Central Africa. In three episodes, the series explores the variety of animals and habitats that are to be found along the river’s 4,700 km (2,922 mi) reach.

Congo was produced for the BBC Natural History Unit and the Discovery Channel by Scorer Associates. The series writer/producer was Brian Leith and the executive producer was Neil Nightingale. Series consultants were Michael Fay, Kate Abernethy, Jonathan Kingdon and Lee White.

Little filming was possible in the Democratic Republic of the Congo which encompasses the vast majority of the river's watershed. (The one exception to this is the brief sequence of Livingstone Falls.) The reason for this is that the Second Congo War (1998–2003) was underway during filming (1999–2000).

The series forms part of the Natural History Unit's Continents strand and was preceded by Andes to Amazon in 2000 and succeeded by Wild Africa later that year in 2001.

Congo (chimpanzee)

Congo (1954–1964) was a chimpanzee who learned how to draw and paint. Zoologist and surrealist painter Desmond Morris first observed his abilities when the chimp was offered a pencil and paper at two years of age. By the age of four, Congo had made 400 drawings and paintings. His style has been described as "lyrical abstract impressionism".

Biography and works

Congo was born in 1954. He learned to draw near the age of two, beginning when zoologist Desmond Morris offered Congo a pencil. Morris said, "He took Pencil and I placed a piece of card in front of him. This is how I recorded it at the time, 'Something strange was coming out of the end of the pencil. It was Congo's first line. It wandered a short way and then stopped. Would it happen again? Yes, it did, and again and again'." Morris soon observed that the chimp would draw circles, and had a basic sense of composition in his drawings. He also showed the ability of symmetrical consistency between two sides of a sketch; when Morris drew a shape at one side of a piece of paper, Congo would balance the structure by making marks on the other half of the paper. Similarly, if a color on one side contained blue for example, he would add blue to the other side as well to keep balance.

Area

Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane. Surface area is its analog on the two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analog of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept).

The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m²), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squares. In mathematics, the unit square is defined to have area one, and the area of any other shape or surface is a dimensionless real number.

Area (graph drawing)

In graph drawing, the area used by a drawing is a commonly used way of measuring its quality.

Definition

For a drawing style in which the vertices are placed on the integer lattice, the area of the drawing may be defined as the area of the smallest axis-aligned bounding box of the drawing: that is, it the product of the largest difference in x-coordinates of two vertices with the largest difference in y-coordinates. For other drawing styles, in which vertices are placed more freely, the drawing may be scaled so that the closest pair of vertices have distance one from each other, after which the area can again be defined as the area of a smallest bounding box of a drawing. Alternatively, the area can be defined as the area of the convex hull of the drawing, again after appropriate scaling.

Polynomial bounds

For straight-line drawings of planar graphs with n vertices, the optimal worst-case bound on the area of a drawing is Θ(n²). The nested triangles graph requires this much area no matter how it is embedded, and several methods are known that can draw planar graphs with at most quadratic area.Binary trees, and trees of bounded degree more generally, have drawings with linear or near-linear area, depending on the drawing style. Every outerplanar graph has a straight-line outerplanar drawing with area subquadratic in its number of vertices, If bends or crossings are allowed, then outerplanar graphs have drawings with near-linear area. However, drawing series-parallel graphs requires an area larger than n by a superpolylogarithmic factor, even if edges can be drawn as polylines.

Area (band)

Area - International POPular Group, most commonly known as Area or AreA, is an Italian progressive rock, jazz fusion, electronic, experimental group formed in 1972 by singer Demetrio Stratos and drummer Giulio Capiozzo. They are considered one of the most respected and important bands of the blooming 1970s Italian progressive rock scene.

History

Demetrio Stratos' years: 1972–1979

Area were formed in Milan in 1972. Originally composed of Demetrio Stratos, Giulio Capiozzo (drums and percussion), Victor Edouard "Eddie" Busnello (saxophone and flutes), Leandro Gaetano (piano), and Johnny Lambizzi (guitar), soon followed by Patrick Djivas (bass) and Patrizio Fariselli (keyboards and piano). The band was led by Demetrio Stratos, an original and talented singer originally from Greece. In 1973, Johnny Lambizzi left the band and was replaced by Paolo Tofani (guitar and synth). In that year, they recorded their first studio album Arbeit macht frei ("Work Brings Freedom"), taken from the inscription that was found on the gate at the entrance to Auschwitz Nazi concentration camp, was released by Cramps Records and the band performed in many musical and cultural events. Area went on tour in Chile and, representing Italy, they took part in the eighth Biennale de Paris. At that time, Area's sound was an odd mish-mash that drew from rock, jazz, Eastern, and Arabic music, and it was the blending of all sorts of music that made the band stand out. The band soon grew to prominence because the youth of the time were able to identify with Area's socialist lyrics, and the band was founded on a strong and virtuosic musicianship. To aficionados of Italian progressive rock, their debut album Arbeit macht frei is considered a classic.