Corona

A corona (Latin, 'crown') is an aura of plasma that surrounds the sun and other celestial bodies. The Sun's corona extends millions of kilometres into space and is most easily seen during a total solar eclipse, but it is also observable with a coronagraph. The word "corona" is a Latin word meaning "crown", from the Ancient Greek κορώνη (korōnè, “garland, wreath”).

The high temperature of the Sun's corona gives it unusual spectral features, which led some in the 19th century to suggest that it contained a previously unknown element, "coronium". Instead, these spectral features have since been explained by highly ionized iron (Fe-XIV). Bengt Edlén, following the work of Grotrian (1939), first identified the coronal lines in 1940 (observed since 1869) as transitions from low-lying metastable levels of the ground configuration of highly ionised metals (the green Fe-XIV line at 5303 Å, but also the red line Fe-X at 6374 Å). These high stages of ionisation indicate a plasma temperature in excess of 1,000,000 kelvin, much hotter than the surface of the sun.

Smith Corona

Smith Corona is a US manufacturer of thermal labels, direct thermal labels, and thermal ribbons used in warehouses for primarily barcode labels. Once a large U.S. typewriter and mechanical calculator manufacturer, it expanded aggressively during the 1960s to become a broad-based industrial conglomerate whose products extended to paints, foods, and paper. The mechanical calculator sector was wiped out in the early 1970s by the production of cheap electronic calculators, and the typewriter business collapsed in the mid-1980s due to the introduction of PC-based word processing. Smith Corona did address this by manufacturing word processing typewriters such as PWP 1400 model. Its competitors were Brother, Olivetti, Adler, Olympia and IBM. In late 2010, Smith Corona entered the industrial ribbon and label market. The company no longer manufacturers typewriters or calculators, but does manufacture large quantities of barcode and shipping labels and thermal ribbons used in thermal transfer printers. Their facility is in Cleveland, OH. Smith Corona now competes with distributors of Zebra Technologies supplies, packaging companies like Uline and various other private companies.

Corona (software)

Corona SDK is a software development kit (SDK) created by Walter Luh, Founder of Corona Labs Inc.. Corona SDK allows software programmers to build mobile applications for iPhone, iPad, and Android devices.

Corona lets developers use integrated Lua, layered on top of C++/OpenGL, to build graphic applications. The SDK does not charge per-app royalty or impose any branding requirement, and has a subscription-based purchase model.

History

Walter Luh started Corona Labs after departing from Adobe in 2007. At Adobe, Luh was the lead architect working on the Flash Lite team. In June 2009, Luh released the first Corona SDK beta free for early adopters.

In December 2009, Corona Labs launched Corona SDK 1.0 for iPhone. The following February, the Corona SDK 1.1 was released with additional features.

In April 2010, the Corona SDK 2.0 beta was released. Corona 2.0's definitive new feature was cross-platform support for iPhone, iPad, and Android devices. Later that month, Corona Labs announced a beta for Corona Game Edition, which includes a physics engine and other advanced features aimed specifically at game development.<ref name=""CoronaLabsBlog2">"Introducing Corona Game Edition - Corona Labs company blog, April 23, 2010". Retrieved 2010-05-17. </ref>

Corona, California

Corona is a city in Riverside County, California, United States. As of the 2010 census, the city had a population of 152,374, up from 124,966 at the 2000 census. The cities of Norco and Riverside lie to the northeast, Eastvale to the north, Chino Hills to the northwest, Yorba Linda, and the Cleveland National Forest and the Santa Ana Mountains to the southwest. Unincorporated areas of Riverside County line all of its other borders.

History

Corona, originally named South Riverside, was founded at the height of the Southern California citrus boom in 1886, and is advantageously situated at the upper end of the Santa Ana River Canyon, a significant pass through the Santa Ana Mountains. The town of Corona was once the "Lemon Capital of the World." A museum there presents the lemon's former role in the local economy. The city derived its name (and its nickname, The Circle City) from the curious layout of its streets, with a standard grid enclosed by the circular Grand Boulevard, 2.75 miles (4.43 kilometers) in circumference. The street layout was designed by Hiram Clay Kellogg, a civil engineer from Anaheim who was an influential figure in the early development of Orange County.