Prism

In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. At least two of the flat surfaces must have an angle between them. The exact angles between the surfaces depend on the application. The traditional geometrical shape is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type. Some types of optical prism are not in fact in the shape of geometric prisms. Prisms can be made from any material that is transparent to the wavelengths for which they are designed. Typical materials include glass, plastic and fluorite.

A dispersive prism can be used to break light up into its constituent spectral colors (the colors of the rainbow). Furthermore, prisms can be used to reflect light, or to split light into components with different polarizations.

How prisms work

Light changes speed as it moves from one medium to another (for example, from air into the glass of the prism). This speed change causes the light to be refracted and to enter the new medium at a different angle (Huygens principle). The degree of bending of the light's path depends on the angle that the incident beam of light makes with the surface, and on the ratio between the refractive indices of the two media (Snell's law). The refractive index of many materials (such as glass) varies with the wavelength or color of the light used, a phenomenon known as dispersion. This causes light of different colors to be refracted differently and to leave the prism at different angles, creating an effect similar to a rainbow. This can be used to separate a beam of white light into its constituent spectrum of colors. Prisms will generally disperse light over a much larger frequency bandwidth than diffraction gratings, making them useful for broad-spectrum spectroscopy. Furthermore, prisms do not suffer from complications arising from overlapping spectral orders, which all gratings have.

List of Humanx Commonwealth planets

This is a list of the fictional planets in the Humanx Commonwealth series of novels by Alan Dean Foster.

Alaspin

Alaspin has large jungles surrounded by equally large savannas and river plains; its only notable celestial feature is two moons.

Currently the planet has no sentient race; the native race died out, possibly by racial suicide, over 75,000 years ago leaving behind hundreds of ancient, abandoned cities that have proved a source of fascination to modern xeno-archaeologists.

A variety of lifeforms currently live on Alaspin, most notably the Alaspinian minidrag.

Annubis

Annubis is most notable for the fictional Hyperion forests from which the fictional drug bloodhype is manufactured. In an attempt to eradicate the highly addictive and deadly drug, the trees were burned in 545 A.A. and are thought to be completely destroyed.

The planet first appeared in the novel Bloodhype.

Blasusarr

Blasusarr is the homeworld of the AAnn race and is often called the Imperial Home World. Climate is dry and hot, largely desert, the preferred atmospheric conditions of the AAnn. Beyond this, little is known about Blasusarr other than the fact that it is very well-protected by a detection and space defense network. Its capital city, also the capital of the AAnn Empire, is Krrassin.

Yoshida Brothers

The Yoshida Brothers (吉田兄弟, Yoshida Kyōdai) are Japanese musicians who have released several albums on the Domo Records label.

The two brothers are performers of the traditional Japanese music style of Tsugaru-jamisen which originated in northern Japan. They debuted in 1999 in Japan as a duo playing the shamisen. Their first album sold over 100,000 copies and made them minor celebrities in Japan, a fact that surprised the Yoshida Brothers themselves. They have since attracted an international audience.

Their music has been a fusion of the rapid and percussive Tsugaru-jamisen style along with Western and other regional musical influences. In addition to performing songs that are only on the shamisen, they also use instruments such as drums and synthesizers.

The commercials for the Nintendo's Wii video game console that began airing in North America in November 2006 featured the Yoshida Brothers song "Kodo (Inside the Sun Remix)".

Members

Ryōichirō Yoshida (吉田 良一郎, Yoshida Ryōichirō, born 26 July 1977) and Kenichi Yoshida (吉田 健一, Yoshida Ken'ichi, born 16 December 1979) were born in Noboribetsu in Hokkaido, Japan. The two brothers have played the shamisen from a very young age. They both began to study and play the shamisen from five years of age under Koka Adachi, learning the Minyō-shamisen style; from about 1989 they studied the Tsugaru-jamisen style under Takashi Sasaki.

IOS (disambiguation)

iOS is a mobile operating system developed by Apple Inc.

IOS or ios may also refer to:

Organizations

Technology

Computing

Ios (island)

Ios (Greek: Ίος, locally Νιός Nios) is a Greek island in the Cyclades group in the Aegean Sea. Ios is a hilly island with cliffs down to the sea on most sides, situated halfway between Naxos and Santorini. It is about 18 kilometres (11 miles) long and 10 kilometres (6 miles) wide, with an area of about 109 square kilometres (42 sq mi). Population was 2,024 in 2011 (down from 3,500 in the 19th century). Ios is part of the Thira regional unit. Ios was the setting for the movie Ginger and Cinnamon (Dillo con parole mie). Also, scenes from the film Big Blue (Le Grand Bleu) were shot in Manganari.

City of Chora

The Port of Ios is at the head of the Ormos harbor in the northwest. From there the bus or a 15-minute walk up the steep donkey path takes you to the village, known as Chora. Chora is a white and very picturesque cycladic village, full of stairs and narrow paths that make it inaccessible for cars of any kind. Today, the main path through this village is completely taken over by tourism in terms of restaurants, boutiques, bars and discothèques. Apart from the port and the village of Chora, Ios has only a few small settlements, just a group of spread out houses in the background of major beaches (Theodoti, Kalamos, Manganari). Since the 1990s, the island mayor Pousseos has worked on Ios' development towards attracting different types of tourists. With the help of European Community funds some roads have been built, all of them paved, and a scenic amphitheater has been created by the German architect Peter Haupt (who died in 2003) at the top of the village hill. Unfortunately, cultural events rarely take place up there.

Siri

Siri (Speech Interpretation and Recognition Interface) /ˈsɪri/ is a computer program that works as an intelligent personal assistant and knowledge navigator, part of Apple Inc.'s iOS, watchOS, and tvOS operating systems. The feature uses a natural language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of Web services. The software, both in its original version and as an iOS feature, adapts to the user's individual language usage and individual searches (preferences) with continuing use, and returns results that are individualized. Siri was originally introduced as an iOS application available in the App Store by Siri Inc., which was acquired by Apple on April 28, 2010. Siri, Inc. had announced that their software would be available for BlackBerry and for phones running Android, but all development efforts for non-Apple platforms were cancelled after the acquisition by Apple.

Siri has been an integral part of iOS since iOS 5 and was introduced as a feature of the iPhone 4S on October 14, 2011. Dictation powered by Siri was added to the third generation iPad with the release of iOS 5.1.1 in May 2012; full Siri support was added with iOS 6. The 5th generation iPod touch, released in October 2012, also gained Siri support. Siri has been included on all mobile Apple hardware manufactured during or after October 2012.