2–3–4 tree

In computer science, a 2–3–4 tree (also called a 2–4 tree) is a self-balancing data structure that is commonly used to implement dictionaries. The numbers mean a tree where every node with children (internal node) has either two, three, or four child nodes:

2-node

2-node

3-node

3-node

4-node

4-node

2–3–4 trees are B-trees of order 4; like B-trees in general, they can search, insert and delete in O(log n) time. One property of a 2–3–4 tree is that all external nodes are at the same depth.

2–3–4 trees are an isometry of red–black trees, meaning that they are equivalent data structures. In other words, for every 2–3–4 tree, there exists at least one red–black tree with data elements in the same order. Moreover, insertion and deletion operations on 2–3–4 trees that cause node expansions, splits and merges are equivalent to the color-flipping and rotations in red–black trees. Introductions to red–black trees usually introduce 2–3–4 trees first, because they are conceptually simpler. 2–3–4 trees, however, can be difficult to implement in most programming languages because of the large number of special cases involved in operations on the tree. Red–black trees are simpler to implement, so tend to be used instead.

Tree63 (album)

Tree63 is Tree63's third album.

Track listing

References

MIX (XM)

MIX, often branded on-air as Today's Mix, was a channel on XM Satellite Radio playing the Hot Adult Contemporary format. It was located on XM 12 (previously 22) and plays a mix of hit songs from 1980-present day, except for urban music. MIX was one of 5 channels on XM's platform that plays commercial advertisements, which amount to about 3–4 minutes an hour, and are sold by Premiere Radio Networks. The channel was programmed by Clear Channel Communications, and was Clear Channel's most listened to channel on XM Radio, in both cume and AQH, according to the Fall 2007 Arbitron book.

Artists heard on MIX included Sheryl Crow, John Mayer, Lenny Kravitz, Jewel and Nelly Furtado; and groups like Maroon 5 and Blues Traveler. One can also hear top chart hits including songs from Train, Alanis Morissette, 3 Doors Down, Evanescence, Dave Matthews Band, No Doubt, Santana, Matchbox Twenty, and U2.

On June 8, 2011, this was replaced by a simulcast by WHTZ, licensed to Newark, New Jersey and serving the New York City area.

KMXV

KMXV ("Mix 93.3") is a Top 40 (CHR) station based in Kansas City, Missouri, United States. The Steel City Media outlet operates at 93.3 MHz with an ERP of 100 kW. Its current slogan is "Kansas City's #1 Hit Music Station". It is also one of two Top 40's competing in the Kansas City Metropolitan Area, the other being KCHZ. The station's studios are located at Westport Center in Midtown Kansas City, and the transmitter site is in the city's East Side.

The station was sold off by CBS Radio to Wilks Broadcasting in November 2006 as part of a nationwide reduction of radio stations by CBS. On June 12, 2014, Wilks announced that it is selling its Kansas City cluster (of which KMXV is part of) to Pittsburgh-based Steel City Media. The sale was approved on September 26, 2014, and was consummated on September 30.

History

The station began in 1958 as KCMK-FM (Kansas City, Missouri/Kansas), a classical station, but had several format changes (primarily country) over the next sixteen years. County DJ Jack Wesley "Cactus Jack" Call was at the station (from KCKN) for one week when he was killed on January 25, 1963 in a car crash. Singer Patsy Cline sang at a benefit for him at Memorial Hall (Kansas City, Kansas) on March 3, 1963. She was unable to leave Kansas City the next day because the airport was fogged in and was killed in a plane crash on March 5, 1963 en route from Fairfax Airport to Nashville.

MIX (Microsoft)

MIX is a Microsoft conference held annually for web developers and designers at which Microsoft showcases upcoming web technologies. The conference is held each spring at the Venetian Hotel in Las Vegas. Unlike many of Microsoft's technical conference, MIX has been promoted more heavily to designers by inviting popular speakers from other popular web design conferences, such as SXSW, and has sponsored a CSS design contest each year to promote the conference. Microsoft has also used this conference as an opportunity to promote new web design and development tools such as Silverlight and Microsoft Expression Studio.

On January 24, 2012, the official Microsoft blog stated that there will be no MIX 2012. MIX was replaced by BUILD later that year.

MIX 06

MIX 06 was held from March 20 to March 22, 2006. It focused on the new Internet Explorer 7 and WPF (a part called WPF/E later became known as Silverlight). It featured a keynote by Bill Gates in which he said "We need microformats".

Secret (Russian band)

Secret (Russian: Секрет) was a Soviet Russian rock and roll band founded in 1982 in Leningrad. The band's musical style and image drawn a heavy inspiration from 1950's and 1960's western music, The Beatles in particular. The band's name was inspired by the Beatles song 'Do You Want to Know a Secret?'. Secret called themselves a "Beat Quartet" and were a part of Soviet rock and roll revival of 1980's, along with Bravo.

The original line-up lasted until 1990, when frontman Maxim Leonidov emigrated to Israel. The band continued with different line-ups without great success. Since 1997 the original line-up has occasionally performed together including for anniversary shows in 2003 and 2007.

Many Secret hits of the 1980s still receive a lot of airplay on Russian FM stations.

Original members

Secret (Madonna song)

"Secret" is a song by American singer Madonna from her sixth studio album Bedtime Stories (1994). It was later included on her greatest hits compilations GHV2 (2001) and Celebration (2009). It was originally written and produced by Madonna with Shep Pettibone, who she had collaborated with on the 1992 album Erotica. On release, the song was credited to Madonna and Dallas Austin. Pettibone was not acknowledged as co-writer until the release of a 2001 remix compilation album GHV2 Remixed: The Best of 1991-2001.

"Secret" received favorable reviews from music critics, who praised Madonna's vocals in the song and its mid-tempo R&B groove, deeming it seductive and soulful. Commecially, the song became a top ten hit around the world. In the United States, it peaked at number three on the Billboard Hot 100 and was certified gold by the Recording Industry Association of America (RIAA). In the United Kingdom it reached a peak of number five, becoming her record-breaking 35th consecutive top-ten single on the UK Singles Chart. Elsewhere, it was also successful, reaching the top five in Australia, Canada, Switzerland and Spain.