RAVE (survey)

RAVE (RAdial Velocity Experiment) is a multi-fiber spectroscopic astronomical survey of stars in the Milky Way using the 1.2-metre UK Schmidt Telescope of the Australian Astronomical Observatory (AAO). The RAVE collaboration consists of researchers from over 20 institutions around the world and is coordinated by the Leibniz Institute for Astrophysics Potsdam (AIP).

As a southern hemisphere survey covering 20,000 square degrees of the sky, RAVE's primary aim is to derive the radial velocity of stars from the observed spectra. Additional information is also derived such as effective temperature, surface gravity, metallicity, photometric parallax and elemental abundance data for the stars.

On April 5, 2013 RAVE concluded its phase of data taking. In an almost ten year observing campaign, a total of 574,630 spectra have been obtained on 483,330 individual stars by a small team of AAO observers, with other observers making occasional visits from RAVE participating institutions.

Description

Rave

A rave (from the verb: to rave) is a large dance party featuring performances by DJs and occasionally live performers playing electronic music, particularly electronic dance music (EDM). The music is amplified with a large, powerful sound reinforcement system, typically with large subwoofers to produce a deep bass sound. The music is accompanied by laser light shows, projected images, visual effects and fog machines. The word "rave" was first used in the late 1980s to describe the subculture that grew out of the acid house movement.

While some raves may be small parties held at nightclubs or private residences, some raves have grown to immense size, such as the Castlemorton Common Festival in 1992. Some electronic dance music festivals have features of raves, but on a large, often commercial scale. Raves may last for a long time, with some events continuing for ten hours. Due to the association of illegal party drugs such as MDMA (ecstasy) and the use of non-authorized, secret venues for some raves, such as squat parties at warehouses, law enforcement attention has been directed at the rave scene in many countries.

Rave (film)

Rave is an American film written and directed by Ron Kraussand starring Efren Ramirez, Douglas Spain, Aimee Graham, Nicholle Tom, Dante Basco and Franco Vega.

Plot

It is Saturday night in Los Angeles and six teenagers are in search of the hottest rave in the city. In one day, we see a portrait of these teenagers finding their way through all the temptations, attractions and dangers of the wild underbelly of Los Angeles.

Sources

Rave (magazine)

Rave is an Indian music magazine, launched in March 2002. It was modeled on Rolling Stones magazine. The magazine is published by Soul City Publications ten times per year. In 2004 the US edition began to be published. Its online edition was started in August 2007.

References

External links

Survey

Survey may refer to:

Quantitative research

Geography

Survey methodology

A field of applied statistics, survey methodology studies the sampling of individual units from a population and the associated survey data collection techniques, such as questionnaire construction and methods for improving the number and accuracy of responses to surveys.

Statistical surveys are undertaken with a view towards making statistical inferences about the population being studied, and this depends strongly on the survey questions used. Polls about public opinion, public health surveys, market research surveys, government surveys and censuses are all examples of quantitative research that use contemporary survey methodology to answer questions about a population. Although censuses do not include a "sample", they do include other aspects of survey methodology, like questionnaires, interviewers, and nonresponse follow-up techniques. Surveys provide important information for all kinds of public information and research fields, e.g., marketing research, psychology, health professionals and sociology.

Surveying

Surveying or land surveying is the technique, profession, and science of determining the terrestrial or three-dimensional position of points and the distances and angles between them. A land surveying professional is called a land surveyor. These points are usually on the surface of the Earth, and they are often used to establish land maps and boundaries for ownership, locations like building corners or the surface location of subsurface features, or other purposes required by government or civil law, such as property sales.

Surveyors work with elements of geometry, trigonometry, regression analysis, physics, engineering, metrology, programming languages and the law. They use equipment like total stations, robotic total stations, GPS receivers, retroreflectors, 3D scanners, radios, handheld tablets, digital levels, drones, GIS and surveying software.

Surveying has been an element in the development of the human environment since the beginning of recorded history. The planning and execution of most forms of construction require it. It is also used in transport, communications, mapping, and the definition of legal boundaries for land ownership. It is an important tool for research in many other scientific disciplines.