Pipa

The pipa (Chinese: 琵琶; pinyin: pípa, [pʰǐpʰǎ]) is a four-stringed Chinese musical instrument, belonging to the plucked category of instruments. Sometimes called the Chinese lute, the instrument has a pear-shaped wooden body with a varying number of frets ranging from 12 to 26. Another Chinese four-string plucked lute is the liuqin, which looks like a smaller version of the pipa.

The pipa is one of the most popular Chinese instruments and has been played for almost two thousand years in China. Several related instruments in East and Southeast Asia are derived from the pipa; these include the Japanese biwa, the Vietnamese đàn tỳ bà, and the Korean bipa. The Korean instrument is the only one of the three that is no longer widely used; examples survive in museums, but recent attempts to revive the Korean instrument have been partially successful in recent years.

History

There are considerable confusion and disagreements about the origin of pipa. This may be due to the fact that the word pipa was used in ancient texts to describe a variety of plucked chordophones from the Qin to the Tang Dynasty, as well as the differing accounts given in these ancient texts. One traditional Chinese narrative recounts the story of the Han Chinese princess, Wang Zhaojun, who was sent to marry a Hun king as part of a peace accord during the Han Dynasty between the Hans and Huns, and the pipa was created so she can play music on horseback to soothe her longings. Some researchers such as Laurence Picken and John Myers suggest a "non-Chinese origin".

Loquat

The loquat (Eriobotrya japonica) is a species of flowering plant in the family Rosaceae, native to south-central China. It is a large evergreen shrub or small tree, grown commercially for its yellow fruit, and also cultivated as an ornamental plant.

Eriobotrya japonica was formerly thought to be closely related to the genus Mespilus, and is still sometimes known as the Japanese medlar. It is also known as Japanese plum and Chinese plum.

Description

Eriobotrya japonica is a large evergreen shrub or small tree, with a rounded crown, short trunk and woolly new twigs. The tree can grow to 5–10 metres (16–33 ft) tall, but is often smaller, about 3–4 metres (10–13 ft). The leaves are alternate, simple, 10–25 centimetres (4–10 in) long, dark green, tough and leathery in texture, with a serrated margin, and densely velvety-hairy below with thick yellow-brown pubescence; the young leaves are also densely pubescent above, but this soon rubs off.

Fruit

Loquats are unusual among fruit trees in that the flowers appear in the autumn or early winter, and the fruits are ripe at any time from early spring to early summer. The flowers are 2 cm (1 in) in diameter, white, with five petals, and produced in stiff panicles of three to ten flowers. The flowers have a sweet, heady aroma that can be smelled from a distance.

Pipa (genus)

Surinam toads, also called star-fingered toads, are members of the frog genus Pipa, within the family Pipidae. They are native to northern South America and extreme southern Central America (Panama). Like other pipids, these frogs are almost exclusively aquatic.

Species

There are seven recognized species:

In addition, Pipa verrucosa Wiegmann, 1832 is included here incertae sedis.

References

External links

Data related to Pipa at Wikispecies Media related to Pipa at Wikimedia Commons

Private

Private may refer to:

Privates redirects here and may refer to:

See also

Private (rocket)

Private was an experimental rocket developed by the California Institute of Technology on behalf of the United States Army. Tested in two different configurations, it provided the proof of concept that a fin-stabilised ballistic missile was technologically feasible, and led to the development of the Corporal ballistic missile.

History

The Private program was begun in 1944 as an outgrowth of work by the California Institute of Technology's Guggenheim Aeronautical Laboratory that had produced the first practical jet-assisted take-off (JATO) rockets. A proposal to adapt the JATO rockets for research into the development of ballistic missiles was accepted, and the first flight of the Private A rocket, developed under the direction of Tsien Hsue-shen, took place in December 1944, conducted at Camp Irwin in California.

Private A was an unguided, fin-stabilised ballistic rocket; it consisted of a JATO unit equipped with cruciform tail fins, and a set of four T22 booster rockets that were jettisoned after launch. This made Private A the first multistage rocket to be flown in the United States.

Information hiding

In computer science, information hiding is the principle of segregation of the design decisions in a computer program that are most likely to change, thus protecting other parts of the program from extensive modification if the design decision is changed. The protection involves providing a stable interface which protects the remainder of the program from the implementation (the details that are most likely to change).

Written another way, information hiding is the ability to prevent certain aspects of a class or software component from being accessible to its clients, using either programming language features (like private variables) or an explicit exporting policy.

Overview

The term encapsulation is often used interchangeably with information hiding. Not all agree on the distinctions between the two though; one may think of information hiding as being the principle and encapsulation being the technique. A software module hides information by encapsulating the information into a module or other construct which presents an interface.