DAMA/NaI

The DAMA/NaI experiment investigated the presence of dark matter particles in the galactic halo by exploiting the model-independent annual modulation signature. As a consequence of its orbit, the Earth should be exposed to a higher flux of dark matter particles around June 2, when its orbital speed is added to the one of the solar system with respect to the galaxy and to a smaller one around December 2, when the two velocities are subtracted. The annual modulation signature is distinctive since the effect induced by dark matter particles must simultaneously satisfy many requirements.

Description

The experimental set-up was located deep underground in the Laboratori Nazionali del Gran Sasso in Italy.

The experimental set-up was made by nine 9.70 kg low-radioactivity scintillating thallium-doped sodium iodide (NaI(Tl)) crystals. Each crystal was faced by two low-background photomultipliers through 10 cm light guides. The detectors were installed inside a sealed copper box flushed with highly pure nitrogen in order to insulate the detectors from air that contains trace amounts of radon, a radioactive gas. To reduce the natural environmental background the copper box is enclosed inside a multicomponent multi-ton passive shield made of copper, lead, polyethylene/paraffin, cadmium foil. A plexiglas box encloses the whole shield and is also kept in a highly pure nitrogen atmosphere. A 1 m concrete neutron moderator largely surrounds the set-up.

Dama

Dama or DAMA may refer to:

Animals

Business, science and technology

Culture

Geography

Dama, Syria

Dama (Arabic: داما‎) is a village in the As-Suwayda Governorate of southwest Syria. It is located in the heart of the Lejah lava plateau, 29 km north west of the city of As-Suwayda. According to the Syria Central Bureau of Statistics, Dama had a population of 1,799 in the 2004 census.

History

Dama and neighboring villages are thought to be the place where Saint Paul took refuge after escaping from Damascus.

The village, like most of the villages in Jabal ad-Druze, was an old Roman location. Many of its houses are still in their original condition. The inhabitants are mostly Druze and their main occupation is agriculture.

In 1596 Dama appeared in the Ottoman tax registers as part of the nahiya of Bani Abdullah in the Qada of Hauran. It had an entirely Muslim population consisting of 74 households and 28 bachelors. Taxes were paid on wheat, barley, summer crops, goats and/or beehives.

Dama played a major role in the late stages of the Great Syrian Revolution (1925-1927). It hosted the important Dama Convention which resulted in the refusal of French proposals and the collapse of negotiations between the Druze rebels and the French. It was also the site of some of the last battles in the revolution fought by guerrilla groups led by Emir Adel Arslan.

Fallow deer

The fallow deer (Dama dama) is a ruminant mammal belonging to the family Cervidae. This common species is native to western Eurasia, but has been introduced to South Africa, Fernando Pó, São Tomé, Madagascar, Mauritius, Mayotte, Réunion, Seychelles, Comoro Islands, Morocco, Algeria, Tunisia, Cyprus, Cape Verde, Australia, New Zealand, Canada, United States, the Falkland Islands and Peru. It often includes the rarer Persian fallow deer as a subspecies (D. d. mesopotamica), while others treat it as an entirely different species (D. mesopotamica).

Description

The male fallow deer is known as a buck, the female is a doe, and the young a fawn. Adult bucks are 140–160 cm (55–63 in) long with a 85–95 cm (33–37 in) shoulder height, and typically 60–100 kg (130–220 lb) in weight; does are 130–150 cm (51–59 in) long with a 75–85 cm (30–33 in) shoulder height, and 30–50 kg (66–110 lb) in weight. The largest bucks may measure 190 cm (75 in) long and weigh 150 kg (330 lb). Fawns are born in spring at about 30 cm (12 in) and weigh around 4.5 kg (9.9 lb). The life span is around 12–16 years.

Nai

Nai or NAI may refer to:

In music:

In organizations:

Nai (song)

"Nai" (Yes) is a CD single by popular Greek artist Irini Merkouri released in December 2007 by Sony BMG Greece.

Track listing

Charts

References

Nai (caste)

The Nai is a caste originating in India. The members were traditionally occupied as barbers, although many have adopted the name Sharma that was historically the preserve of Brahmins.

Distribution

In the state of Gujarat the Nais are referred by the name Valand. The Valand have several territorial divisions, such as the Soratia, Halai, Gohil, and Jalawadi. They are further divided into clans, called ataks, the main ones being the Vaghela, Parmar and Hanani. The Valand are endogamous and practice clan exogamy. They speak Gujarati and concentrated in the urban areas. The community is involved in the different trades, with many rural Valand have given up agriculture. Some are practitioners of Ayurvedic medicine.

The Nai community is listed as an Other Backward Class in various regions of India. These include: