Four-velocity
In physics, in particular in special relativity and general relativity, a four-velocity is a four-vector in four-dimensional spacetime that represents the relativistic counterpart of velocity, which is a three-dimensional vector in space.
Physical events correspond to mathematical points in time and space, the set of all of them together forming a mathematical model of physical four-dimensional spacetime. The history of an object traces a curve in spacetime, called its world line. If the object is massive, so that its speed is less than the speed of light, the world line may be parametrized by the proper time of the object. The four-velocity is the rate of change of four-position with respect to the proper time along the curve. The velocity, in contrast, is the rate of change of the position in (three-dimensional) space of the object, as seen by an observer, with respect to the observer's time.
The value of the magnitude of an object's four-velocity, i. e. the quantity obtained by applying the metric tensor g to the four-velocity u, that is ||u||2 = u ⋅ u = gμνuνuμ, is always equal to ±c2, where c is the speed of light. Whether the plus or minus sign applies depends on the choice of metric signature. For an object at rest its four-velocity is parallel to the direction of the time coordinate with u0 = c. A four-velocity is thus the normalized future-directed timelike tangent vector to a world line, and is a contravariant vector. Though it is a vector, addition of two four-velocities does not yield a four-velocity: The space of four-velocities is not itself a vector space.
10 Speed (album)
10 Speed is the second studio album by the Canadian rock band Mystery Machine. It was released in Jan 23, 1996 on the Nettwerk America label. 10 Speed was a notable album for being one of the first forays into mixing media and music in compact discs.
Track listing
External links
SPEED2000
SPEED2000 is a software package designed for electromagnetic simulation for the analysis and design of high-speed electronic systems. It combines an electromagnetic field solver with circuit and transmission line simulations which allows it to compute dynamic electromagnetic interactions within integrated circuits. SPEED2000 provides electrical analysis of integrated circuit (IC) packages and printed circuit boards (PCBs). It is developed and marketed by Sigrity, Inc.
History
The algorithims on which SPEED2000 is based were initially developed by Dr. Jiayuan Fang (then Associate Professor of Electrical Engineering at Binghamton University) and his students. The electromagnetic simulation algorithims that he developed were 1000 times faster previous methods.
Dr. Fang patented the algorithims (see below) and founded a company called Sigrity, Inc. to further develop the software. He eventually left Binghamton University to work on his software full-time. The rights to the initial patents are owned by Binghamton University and the royalties provide funding for current research efforts at the university.
Kiss (Bad Boys Blue album)
Kiss is the ninth studio album of German band Bad Boys Blue. It was released on September 27, 1993 by Coconut Records. One single was also released. John McInerney performed "Kiss You All Over, Baby" which before had been sung by Trevor Taylor. The song "Save Your Love" from the previous album was performed here as "Aguarda Tu Amorin" in Spanish. The song "Kisses And Tears" is taken from the second album.
This record was the last with Trevor Bannister. In 1993, Bad Boys Blue toured around Africa with singer Owen Standing who never was an official band member.
Track listing
Personnel
CKIS-FM
CKIS-FM is a Canadian radio station, broadcasting at 92.5 FM in Toronto, Ontario. The station broadcasts a Top 40 (CHR) format branded as KiSS 92.5. The station is one of two CHR-pop stations licensed to the city of Toronto (the other being CKFM) as well as the first CHR-pop station owned by Rogers since CHTT-FM in Victoria shifted from top 40 to hot AC in July 2003.
CKIS's studios are located at the Rogers Building at Bloor and Jarvis in the northeastern corner of downtown Toronto, while its transmitter is located atop First Canadian Place.
History
Country music (1993-1999)
On August 8, 1990, Rawlco Communications was awarded a licence from the Canadian Radio-television and Telecommunications Commission (CRTC) for a new FM radio station. The format chosen to air on the frequency was country music that would target an audience ranging from 25–54 years of age. Rawlco planned on changing frequencies for the station to 99.1 FM, which was formerly the home of CKO-FM-1, but cancelled the plan after the CRTC denied this, and gave 99.1 to CBLA. On January 26, 1993 at 1 PM, singer Anne Murray pressed the button to launch the station, with the CISS-FM call letters and "92.5 CISS-FM" (pronounced "Kiss FM") branding. The station's licensing by the Canadian Radio-television and Telecommunications Commission had been controversial, because the CRTC had passed over an application by Milestone Radio for an urban music station, which would have been a new format in the Toronto market, in favour of Rawlco's application. Milestone's second attempt at an urban station was also passed over in favour of CBLA; the company finally won a licence on its third attempt, and launched CFXJ-FM in 2001. The station's transmitter was located atop First Canadian Place.
Kiss (UK radio station)
Kiss is a UK radio station which is broadcasting on FM and National DAB, specialising in hip hop, R&B, urban and electronic dance music. It also broadcasts on DAB Digital Radio around the UK & nationally on Freeview, Sky and Virgin Media. Owned by Hamburg based Bauer Media Group, Kiss forms part of Bauer's National portfolio of radio brands. Kiss spin-off brands include Kisstory and Kiss Fresh.
History
Kiss FM began in October 1985 as a pirate radio station, broadcasting first to South London then across the whole city, on 94FM. The station had gained a large audience by the time it was awarded a legitimate licence in 1990. ″The team which transformed KISS 94 FM to KISS 100FM included Lyn Champion, a BBC Radio 1 producer and UK Dance promo producer, who in the early 80s had started a weekly column in London's City Limits magazine listing pirate radio shows from the mighty JFM, Invicta and K-Jazz. Lyn was brought in to help write the original proposal in 1989 and was Head of Talks responsible for all spoken word output on the new KISS 100 FM. The British Broadcasting Act of 1990 (the start of Thatcher's de-regulation programme) abolished the ″IBA″ which had enshrined community and spoken word programming within the licence, so KISS 100 FM missed the opportunity to initiate the 20 year wave of documentary series and cultural broadcasting about R&B based music, jazz, reggae, blues, electro and rap which was intended within original legally approved brief ″″. This material had never been broadcast in the UK on radio or TV and this was a key reason the station received an IBA license. A missed opportunity indeed as it became the standard fare of every major broadcaster through the 90s and noughties. Lyn Champion was the first to leave as a result, followed by such icons as Norman Jay. Lyn lectures extensively about media de-regulation and content.
A Good Scent from a Strange Mountain
A Good Scent from a Strange Mountain is a 1992 collection of short stories by Robert Olen Butler. It received the Pulitzer Prize for Fiction in 1993.
Each story in the collection is narrated by a different Vietnamese immigrant living in the U.S. state of Louisiana. The stories are largely character-driven, with cultural differences between Vietnam and the United States as an important theme. Many of the stories were first published in journals such as The Hudson Review, The Southern Review, and The Virginia Quarterly Review. The collection was re-released in 2001 with two additional stories, "Salem" and "Missing".
Synopsis
Open Arms
The opening story is set during the Vietnam War. The narrator, a translator for the Australian forces, recounts the story of a North Vietnamese communist named Thập who joins the Australian forces as a spy, after the communists massacre his family. When the Australian soldiers bring him to a screening of pornographic films, Thập seems overwhelmed and disgusted. The narrator speculates that, as a former Communist, he considers pornography immoral, and that it simultaneously reminds him of his longing for his dead wife. Thập later kills an Australian soldier and himself.
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