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DVD

DVD-R read/write side
Media type	Optical disc
Capacity	4.7 GB (single-sided, single-layer – common) 8.5–8.7 GB (single-sided, double-layer) 9.4 GB (double-sided, single-layer) 17.08 GB (double-sided, double-layer – rare)
Read mechanism	650 nm laser, 10.5 Mbit/s (1×)
Write mechanism	10.5 Mbit/s (1×)
Standard	DVD Forum's DVD Books[1][2][3] and DVD+RW Alliance specifications

DVD is an optical disc storage format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. DVDs offer higher storage capacity than Compact Discs while having the same dimensions.

Pre-recorded DVDs are mass-produced using molding machines that physically stamp data onto the DVD. Such discs are known as DVD-ROM, because data can only be read and not written nor erased. Blank recordable DVD discs (DVD-R and DVD+R) can be recorded once using a DVD recorder and then function as a DVD-ROM. Rewritable DVDs (DVD-RW, DVD+RW, and DVD-RAM) can be recorded and erased multiple times.

DVDs are used in DVD-Video consumer digital video format and in DVD-Audio consumer digital audio format, as well as for authoring AVCHD discs. DVDs containing other types of information may be referred to as DVD data discs.

History[link]

Before the advent of DVD, Video CD (VCD) became the first format for distributing digitally encoded films on standard 120 mm optical discs. (Its predecessor, CD Video, used analog video encoding.) VCD was on the market in 1993.^[4] In the same year, two new optical disc storage formats were being developed. One was the Multimedia Compact Disc (MMCD), backed by Philips and Sony, and the other was the Super Density (SD) disc, supported by Toshiba, Time Warner, Matsushita Electric, Hitachi, Mitsubishi Electric, Pioneer, Thomson, and JVC.

Representatives of the SD camp approached IBM, asking for advice on the file system to use for their disc as well as seeking support for their format for storing computer data. Alan E. Bell, a researcher from IBM's Almaden Research Center got that request and also learned of the MMCD development project. Wary of being caught in a repeat of the costly videotape format war between VHS and Betamax in the 1980s, he convened a group of computer industry experts, including representatives from Apple, Microsoft, Sun Microsystems, Dell, and many others. This group was referred to as the Technical Working Group, or TWG.

The TWG voted to boycott both formats unless the two camps agreed on a single, converged standard.^[5] Lou Gerstner, president of IBM, was recruited to apply pressure on the executives of the warring factions. Eventually, the computer companies won the day, and a single format, now called DVD, was agreed upon. The TWG also collaborated with the Optical Storage Technology Association (OSTA) on the use of their implementation of the ISO-13346 file system (known as Universal Disc Format) for use on the new DVDs.

Philips and Sony decided that it was in their best interests to avoid another format war over their Multimedia Compact Disc, and agreed to unify with companies backing the Super Density Disc to release a single format with technologies from both. The specification was mostly similar to Toshiba and Matsushita's Super Density Disc, except for the dual-layer option (MMCD was single-sided and optionally dual-layer, whereas SD was single-layer but optionally double-sided) and EFMPlus modulation.

EFMPlus was chosen because of its great resilience to disc damage, such as scratches and fingerprints. EFMPlus, created by Kees Immink (who also designed EFM), is 6% less efficient than the modulation technique originally used by Toshiba, which resulted in a capacity of 4.7 GB, as opposed to the original 5 GB. The result was the DVD specification, finalized for the DVD movie player and DVD-ROM computer applications in December 1995.

The DVD Video format was first introduced by Toshiba in Japan in November 1996, in the United States in March 1997 (test marketed),^[6] in Europe in October 1998, and in Australia in February 1999.

In May 1997, the DVD Consortium was replaced by the DVD Forum, which is open to all other companies.^[6]

Specifications[link]

DVD specifications created and updated by the DVD Forum are published as so-called DVD Books (e.g. DVD-ROM Book, DVD-Audio Book, DVD-Video Book, DVD-R Book, DVD-RW Book, DVD-RAM Book, DVD-AR Book, DVD-VR Book, etc.).^[1][2][3]

Some specifications for mechanical, physical and optical characteristics of DVD optical discs can be downloaded as freely available standards from the ISO website.^[7] Also, the DVD+RW Alliance publishes competing DVD specifications such as DVD+R, DVD+R DL, DVD+RW or DVD+RW DL. These DVD formats are also ISO standards.^{[8][9][10][11]}

Some of DVD specifications (e.g. for DVD-Video) are not publicly available and can be obtained only from the DVD Format/Logo Licensing Corporation for a fee of US $5000.^[12][13] Every subscriber must sign a non-disclosure agreement as certain information in the DVD Book is proprietary and confidential.^[12]

Etymology[link]

The official DVD charter documents specify that the basis of the DVD name stems from the term digital versatile disc.^[14] Usage in the present day varies, with Digital Versatile Disc,^[15] Digital Video Disc, and DVD being the most common.

DVD was originally used as an initialism for the unofficial term digital videodisc.^[16]

A newsgroup FAQ written by Jim Taylor (a prominent figure in the industry) claims that four years later, in 1999, the DVD Forum stated that the format name was simply the three letters "DVD" and did not stand for anything.^[17]

The DVD Forum website has a section called "DVD Primer" in which the answer to the question, "What does DVD mean?" reads, "The keyword is 'versatile.' Digital Versatile Discs provide superb video, audio and data storage and access—all on one disc."^[18]

Identification (MID)[link]

This unreferenced section requires citations to ensure verifiability.

This section appears to be written like an advertisement. Please help improve it by rewriting promotional content from a neutral point of view and removing any inappropriate external links. (January 2012)

The DVD is made of a spiral groove read or written starting at the center. The form of the groove encodes unalterable identification data known as the Media Identification Code (MID). The MID contains prerecorded information indicating the disc's original manufacturer, apart from any visible branding on the disc itself. Also included is the byte capacity and permitted burning speeds (dependent on both the recorder, or burner, as well as what the disc can handle). This information can be read on many disc authoring software products.

A MID code is generally seen to be more reassuring for individuals whose priority is the long-term storage of their data than just buying for the sake of a brand name. For example, members of the Internet community Club MyCE, which specialises in disc burning, maintain that anything not produced by Japanese disc manufacturers Verbatim or Taiyo Yuden will be of inferior burning quality and offer shorter longevity.

Verbatim and Taiyo Yuden have high-quality standards to ensure their discs are excellent, (and anything that fails their strict quality tests may be destroyed) whilst other famous disc manufacturers, such as CMC Magnetics Corporation or Ritek Corporation, tend to produce batches with varying quality, resulting in inconsistency and poor burning results. Another reason is the burner's firmware, a set of instructions as to how to interact with the disc, varies from burner to burner. They determine how well a burn will be, or even if it will finish at all. A burn that fails to record during burning or verifying, is referred to as a "coaster" - or an unusable disc. Several errors as such may be encountered when trying to play back the disc.

Additionally, it is the firmware that determines how well it supports the MID code. Samsung and BenQ burners for example tend to be more tolerant of less well-known MID codes, whilst a LG and a Matsushita burner (made by parent company Panasonic) might be a little pickier over what it can handle.

As a result, many disc producers have turned to "faking" MID codes in order to obtain better firmware support. UmeDisc, which produces discs on behalf of AOne, Tesco, Signellex, etc., may turn to faking a Taiyo Yuden MID or a Mitsubishi MKM MID (manufacturer for Verbatim) so the burner can interpret it better. An AOne 8x DVD-R disc uses a Taiyo Yuden MID (TYG02), although its real MID code should be UME01.

The cheaper brand of discs may turn to "outsourcing" their products. This is where a brand name of disc changes the manufacturer depending on who will sell them a batch of discs at the lowest price. Memorex is notable for changing their manufacturers frequently (one spindle of DVD blanks may be produced by one manufacturer whilst another spindle may be produced by another). Brands that outsource tend to obtain the lowest quality batches, and making them inconsistent for burning and long-term storage.

However, some brands of discs remain loyal to their supplier. Traxdata and Arita are Ritek-only brands, whilst Datasafe and Datawrite are supplied exclusively by CMC Magnetics.

Design[link]

Comparison of several forms of disk storage showing tracks (not-to-scale); green denotes start and red denotes end.
* Some CD-R(W) and DVD-R(W)/DVD+R(W) recorders operate in ZCLV, CAA or CAV modes, but most work in Constant linear velocity (CLV) mode.

As a movie delivery medium[link]

DVD was adopted by movie and home entertainment distributors to replace the ubiquitous VHS tape as the primary means of distributing films to consumers in the home entertainment marketplace. DVD was chosen for its superior ability to reproduce moving pictures and sound, for its superior durability, and for its interactivity. Interactivity had proven to be a feature which consumers, especially collectors, favored when the movie studios released their films on LaserDisc. When the price point for a LaserDisc at approximately $100 per disc moved to $20 per disc at retail, this luxury feature became available for mass consumption. Simultaneously, the movie studios decided to change their home entertainment release model from a rental model to a for purchase model, and large numbers of DVDs were sold.

At the same time, a demand for interactive design talent and services was created. Movies in the past had uniquely designed title sequences. Suddenly every movie being released required information architecture and interactive design components that matched the film's tone and were at the quality level that Hollywood demanded for its product.

As an interactive medium[link]

DVD as a format had two qualities at the time that were not available in any other interactive medium: enough capacity and speed to provide high quality, full motion video and sound, and low cost delivery mechanism provided by consumer products retailers. Retailers would quickly move to sell their players for under $200, and eventually for under $50 at retail. In addition, the medium itself was small enough and light enough to mail using general first class postage. Almost overnight, this created a new business opportunity and model for business innovators, such as Netflix, to re-invent the home entertainment distribution model. It also opened up the opportunity for business and product information to be inexpensively provided on full motion video through direct mail.

Capacity[link]

The basic types of DVD (12 cm diameter, single-sided or homogeneous double-sided) are referred to by a rough approximation of their capacity in gigabytes. In draft versions of the specification, DVD-5 indeed held five gigabytes, but some parameters were changed later on as explained above, so the capacity decreased. Other formats, those with 8 cm diameter and hybrid variants, acquired similar numeric names with even larger deviation.

The 12 cm type is a standard DVD, and the 8 cm variety is known as a MiniDVD. These are the same sizes as a standard CD and a mini-CD, respectively. The capacity by surface (MiB/cm²) varies from 6.92 MiB/cm² in the DVD-1 to 18.0 MiB/cm² in the DVD-18.

As with hard disk drives, in the DVD realm, gigabyte and the symbol GB are usually used in the SI sense (i.e., 10⁹, or 1,000,000,000 bytes). For distinction, gibibyte (with symbol GiB) is used (i.e., 1024³ (2³⁰), or 1,073,741,824 bytes).

Size comparison: a 12 cm DVD+RW and a 19 cm pencil.

Each DVD sector contains 2,418 bytes of data, 2,048 bytes of which are user data. There is a small difference in storage space between + and - (hyphen) formats:

Technology[link]

DVD-RW Drive operating with the protective cover removed.

DVD uses 650 nm wavelength laser diode light as opposed to 780 nm for CD. This permits a smaller pit to be etched on the media surface compared to CDs (0.74 µm for DVD versus 1.5 µm for CD), allowing in part for DVD's increased storage capacity.

In comparison, Blu-ray Disc, the successor to the DVD format, uses a wavelength of 405 nm, and one dual-layer disc has a 50 GB storage capacity.

Writing speeds for DVD were 1×, that is, 1,385 kB/s (1,353 KiB/s), in the first drives and media models. More recent models, at 18× or 20×, have 18 or 20 times that speed. Note that for CD drives, 1× means 153.6 kB/s (150 KiB/s), about one-ninth as swift.^[21][23]

Internal mechanism of a drive[link]

This mechanism is shown right side up; the disc would sit on top of it. The laser and optical system scans the underside of the disc.

With reference to the photo, just to the right of image center is the disc spin motor, a gray cylinder, with its gray centering hub and black resilient drive ring on top. There is a disc-shaped round clamp, loosely held inside the cover and free to rotate; it's not in the photo. After the disc tray stops moving inward, as the motor and its attached parts rise, a magnet near the top of the rotating assembly contacts and strongly attracts the clamp to hold and center the disc. This motor has an external rotor – every visible part of it spins.

The gray metal chassis is shock-mounted at its four corners to reduce sensitivity to external shocks, and to reduce drive noise from residual imbalance when running fast. The soft shock mount grommets are just below the brass-colored washers at the four corners (the left one is obscured). Running through those grommets are screws to fasten them to the black plastic frame that's underneath.

Two parallel precision guide rods that run between upper left and lower right in the photo carry the "sled", the moving optical read-write head. As shown, this "sled" is close to, or at the position where it reads or writes at the edge of the disc.

A dark gray disc with two holes on opposite sides has a blue lens surrounded by silver-colored metal. This is the lens that's closest to the disc; it serves to both read and write by focusing the laser light to a very small spot. Under the disc is an ingenious actuator comprising permanent magnets and coils that move the lens up and down to maintain focus on the data layer. As well, the actuator moves the lens slightly toward and away from the spin-motor spindle to keep the spot on track. Both focus and tracking are relatively quite fast and very precise. These servos are comparatively wideband.

To select tracks (or files) as well as advancing the "sled" during continuous read or write operations, a motor (it could be a stepping motor; one would hear it if it were) rotates a coarse-pitch leadscrew to move the "sled" throughout its total travel range. The motor, itself, is the gray cylinder just to the left of the most-distant shock mount; its shaft is parallel to the support rods. The leadscrew is the rod with evenly-spaced darker details; these are the helical groove that engages a pin on the "sled".

The irregular orange material is flexible etched copper foil supported by thin sheet plastic; these are "flexible printed circuits" that connect everything to the electronics (which is not shown).

DVD recordable and rewritable[link]

Sony DVD Read & Rewritable

HP initially developed recordable DVD media from the need to store data for backup and transport.

DVD recordables are now also used for consumer audio and video recording. Three formats were developed: DVD-R/RW, DVD+R/RW (plus), and DVD-RAM. DVD-R is available in two formats, General (650 nm) and Authoring (635 nm), where Authoring discs may be recorded with CSS encrypted video content but General discs may not.^[25]

Although most DVD writers can nowadays write the DVD+R/RW and DVD-R/RW formats (usually denoted by "DVD±RW" and/or the existence of both the DVD Forum logo and the DVD+RW Alliance logo), the "plus" and the "dash" formats use different writing specifications. Most DVD readers and players will play both kinds of discs, although older models can have trouble with the "plus" variants.

Some first generation DVD players would cause damage to DVD±R/RW/DL when attempting to read them.

Dual-layer recording[link]

Dual-layer recording (sometimes also known as double-layer recording) allows DVD-R and DVD+R discs to store significantly more data—up to 8.5 gigabytes per disc, compared with 4.7 gigabytes for single-layer discs. Along with this, DVD-DLs have slower write speeds as compared to ordinary DVDs. When played, a slight transition can sometimes be seen in the playback when the player changes layers. DVD-R DL was developed for the DVD Forum by Pioneer Corporation; DVD+R DL was developed for the DVD+RW Alliance by Philips and Mitsubishi Kagaku Media (MKM).^[26]

A dual-layer disc differs from its usual DVD counterpart by employing a second physical layer within the disc itself. The drive with dual-layer capability accesses the second layer by shining the laser through the first semitransparent layer. In some DVD players, the layer change can exhibit a noticeable pause, up to several seconds.^[27] This caused some viewers to worry that their dual-layer discs were damaged or defective, with the end result that studios began listing a standard message explaining the dual-layer pausing effect on all dual-layer disc packaging.

DVD recordable discs supporting this technology are backward-compatible with some existing DVD players and DVD-ROM drives.^[26] Many current DVD recorders support dual-layer technology, and the price is now comparable to that of single-layer drives, although the blank media remain more expensive. The recording speeds reached by dual-layer media are still well below those of single-layer media. A potential reason is how Dual Layer discs are not as well matured compared to the Single Layer discs, as well as consumers, on a whole, have no desire for increased burning speeds.

There are two modes for dual-layer orientation. With Parallel Track Path (PTP), used on DVD-ROM, both layers start at the inside diameter (ID) and end at the outside diameter (OD) with the lead-out. With Opposite Track Path (OTP), used on many Digital Video Discs, the lower layer starts at the ID and the upper layer starts at the OD, where the other layer ends; they share one lead-in and one lead-out.

DVD-Video[link]

DVD-Video is a standard for storing and distributing video/audio content on DVD media. The format went on sale in Japan in 1996, in the United States in 1997, in Europe in 1998 and in Australia in 1999.^[28] DVD-Video became the dominant form of home video distribution in Japan when it first went on sale in 1996, but did not become the dominant form of home video distribution in the United States until June 15, 2003, when weekly DVD-Video in the United States rentals began outnumbering weekly VHS cassette rentals, reflecting the rapid adoption rate of the technology in the U.S. marketplace.^[5][29] Currently, DVD-Video is the dominant form of home video distribution worldwide, although in Japan it was surpassed by Blu-ray Disc when Blu-ray first went on sale in Japan on March 31, 2006.

Security[link]

The Content Scramble System (CSS) is a Digital Rights Management (DRM) and encryption system employed on almost all commercially produced DVD-video discs. CSS utilizes a proprietary 40-bit stream cipher algorithm. The system was introduced around 1996 and was first compromised in 1999.

The purpose of CSS is twofold:

1. CSS prevents byte-for-byte copies of an MPEG (digital video) stream from being playable since such copies do not include the keys that are hidden on the lead-in area of the restricted DVD.
2. CSS provides a reason for manufacturers to make their devices compliant with an industry-controlled standard, since CSS scrambled discs cannot in principle be played on noncompliant devices; anyone wishing to build compliant devices must obtain a license, which contains the requirement that the rest of the DRM system (region codes, Macrovision, and user operation prohibition) be implemented.^[30]

While most CSS-decrypting software is used to play DVD videos, other pieces of software (such as DVD Decrypter, AnyDVD, DVD43, Smartripper, and DVD Shrink) can copy a DVD to a hard drive and remove Macrovision, CSS encryption, region codes and user operation prohibition.

Consumer restrictions[link]

The rise of filesharing and "piracy" has prompted many copyright holders to display notices on DVD packaging or displayed on screen when the content is played that warn consumers of the illegality of certain uses of the DVD. It is commonplace to include a 90 second advert warning that most forms of copying the contents are illegal. Many DVDs prevent skipping past or fast-forwarding through this warning.

Arrangements for renting and lending differ by geography. In the U.S., the right to re-sell, rent, or lend out bought DVDs is protected by the first-sale doctrine under the Copyright Act of 1976. In Europe, rental and lending rights are more limited, under a 1992 European Directive that gives copyright holders broader powers to restrict the commercial renting and public lending of DVD copies of their work.

DVD-Audio[link]

DVD-Audio is a format for delivering high fidelity audio content on a DVD. It offers many channel configuration options (from mono to 5.1 surround sound) at various sampling frequencies (up to 24-bits/192 kHz versus CDDA's 16-bits/44.1 kHz). Compared with the CD format, the much higher-capacity DVD format enables the inclusion of considerably more music (with respect to total running time and quantity of songs) and/or far higher audio quality (reflected by higher sampling rates and greater sample resolution, and/or additional channels for spatial sound reproduction). This DVD-Audio technique was first used by the brothers Lagkind.^{[citation needed]}

Despite DVD-Audio's superior technical specifications, there is debate as to whether the resulting audio enhancements are distinguishable in typical listening environments. DVD-Audio currently forms a niche market, probably due to the very sort of format war with rival standard SACD that DVD-Video avoided.

Security[link]

DVD-Audio discs employ a DRM mechanism, called Content Protection for Prerecorded Media (CPPM), developed by the 4C group (IBM, Intel, Matsushita, and Toshiba).

Although CPPM was supposed to be much harder to crack than DVD-Video's CSS, it too was eventually cracked in 2007 with the release of the dvdcpxm tool. The subsequent release of the libdvdcpxm library (which is based on dvdcpxm) allowed for the development of open source DVD-Audio players and ripping software, such as DVD-Audio Explorer.^[31] As a result, making 1:1 copies of DVD-Audio discs is now possible with relative ease, much like DVD-Video discs.

Blu-ray Disc/HD DVD[link]

In 2006, two new formats called HD DVD and Blu-ray Disc were released as the successor to DVD. HD DVD competed unsuccessfully with Blu-ray Disc in the format war of 2006–2008. A dual layer HD DVD can store up to 30GB and a dual layer Blu-ray disc can hold up to 50GB.^[32][33]

However, unlike previous format changes, e.g., audio tape to Compact Disc or VHS videotape to DVD, there is no immediate indication that production of the standard DVD will gradually wind down, as they still dominate, with around 75% of video sales and approximately one billion DVD player sales worldwide as of 3 April 2011. In fact, experts claim that the DVD will remain the dominant medium for at least another five years as Blu-ray technology is still in its introductory phase, write and read speeds being poor as well as the fact of necessary hardware being expensive and not readily available.^[5][34][35]

Consumers initially were also slow to adopt Blu-ray due to the cost.^[36] By 2009, 85% of stores were selling Blu-ray Discs. A high-definition television and appropriate connection cables are also required to take advantage of Blu-ray disc. Some analysts suggest that the biggest obstacle to replacing DVD is due to its installed base; a large majority of consumers are satisfied with DVDs.^[37] The DVD succeeded because it offered a compelling alternative to VHS. In addition, Blu-ray players and now defunct format HD DVD players are designed to be backward-compatible, allowing older DVDs to be played since the media are physically identical; this differed from the change from vinyl to CD and from tape to DVD, which involved a complete change in physical medium. As of 2011^[update] it is still commonplace for major releases to be issued in "combo pack" format, including both a DVD and a Blu-ray disc (as well as, in many cases, a third disc with an authorized digital copy). Also, some multi-disc sets use Blu-ray for the main feature, but DVDs for supplementary features (examples of this include the Harry Potter "Ultimate Edition" collections, the 2009 re-release of the 1967 The Prisoner TV series, and a 2007 collection related to Blade Runner). Another reason cited (July 2011) for the slower transition to Blu-ray from DVD is the necessity of and confusion over "firmware updates" and needing an internet connection to perform updates.

This situation can be best compared to the changeover from 78 rpm shellac recordings to 45 rpm and 33⅓ rpm vinyl recordings; because the medium used for the earlier format was virtually the same as the latter version (a disc on a turntable, played using a needle), phonographs continued to be built to play obsolete 78s for decades after the format was discontinued. Manufacturers continue to release standard DVD titles as of 2012^[update], and the format remains the preferred one for the release of older television programs and films, with some programs such as Star Trek: The Original Series needing to be re-scanned to produce a high definition version from the original film recordings (certain special effects were also updated in order to be better received in high-definition viewing).^[38] In the case of Doctor Who, a series primarily produced on standard definition videotape between 1963 and 1989, BBC Video reportedly intends to continue issuing DVD-format releases of that series until at least November 2013 (since there would be very little increase in visual quality from upconverting the standard definition videotape masters to high definition).^[39]

Use as backup medium[link]

Durability of DVDs is measured by how long the data may be read from the disc, assuming compatible devices exist that can read it: that is, how long the disc can be stored until data is lost. Five factors affect durability: sealing method, reflective layer, organic dye makeup, where it was manufactured, and storage practices.^[40]

The longevity of the ability to read from a DVD+R or DVD-R is largely dependent on manufacturing quality, ranging from 2 to 15 years,^[41][42][43] and is believed to be an unreliable medium for backup unless great care is taken for storage conditions and handling.

According to the Optical Storage Technology Association (OSTA), "manufacturers claim life spans ranging from 30 to 100 years for DVD, DVD-R and DVD+R discs and up to 30 years for DVD-RW, DVD+RW and DVD-RAM".^[44]

See also[link]

This "see also" section may contain an excessive number of suggestions. Please ensure that only the most relevant suggestions are given and that they are not red links, and consider integrating suggestions into the article itself. (March 2012)

• Book type
• Digital video recorder
• Disk drive performance characteristics
• DVD authoring
• DVD ripper
• DVD region code
• DVD TV game
• Professional disc
• DVD single

References[link]

Further reading[link]

External links[link]

Wikimedia Commons has media related to: DVD

Wikibooks has a book on the topic of All About Converting From Several Video Formats To DVD

Wikibooks has a book on the topic of Inside DVD-Video/MPEG Format

• DVD at the Open Directory Project
• Dual Layer Explained – Informational Guide to the Dual Layer Recording Process
• DVD Frequently Asked Questions (and Answers)
• DVD Burning and Ripping: A Primer, A Glossary
• YouTube: Segment from 1997 Toshiba DVD demo disc: Technical information about the then-new DVD format, from "DVD Gallery," an in-store demonstration disc from Toshiba

Deborah Hay is an experimental choreographer working in the field of postmodern dance.

Life and work[link]

Deborah Hay was born in 1941 in Brooklyn. Her mother was her first dance teacher and directed her training until she was a teenager. Hay moved at age 19 to Downtown, Manhattan in the 1960s, where she continued her training with Merce Cunningham and Mia Slavenska. In 1964 Hay danced with the Cunningham Dance Company during a 6-month tour through Europe and Asia.^[1]

Hay was a member of a group of artists that was deeply influenced by the work of Merce Cunningham and John Cage. The group, later known as the Judson Dance Theater, became one of the most radical and explosive postmodern 20th century art movements.

By 1967 Hay had already achieved a prominent status as a young choreographer, and her unique style began to emerge as a distinct voice within the aesthetics of Judson. Sharing with her colleagues the ideas that dance engage with other art forms, and that the artificial distinction between trained and untrained performers be challenged, she focused on large-scale dance projects involving untrained dancers, fragmented and choreographed music accompaniment, and the execution of ordinary movement patterns performed under stressful conditions.

In 1970 she left New York to live in a community in northern Vermont. Soon, she distanced herself from the performing arena, producing 10 “Circle Dances,” performed on 10 consecutive nights within a single community and no audience whatsoever. Thus began a long period of reflection about how dance is transmitted and presented. Her first book, "Moving Through the Universe in Bare Feet" (Swallow Press, 1975), is an early example of her distinctive memory/concept mode of choreographic record, and emphasizes the narratives underlining the process of her dance-making, rather than the technical specifications or notations of their form.

In 1976 Hay left Vermont and moved to Austin, Texas. Her attention focused on a set of practices ("playing awake") that engaged the performer on several levels of consciousness at once. While developing her concepts over the course of 15 years, she instituted a yearly four-month group workshop that culminated in large group public performances ^[2] and from these group pieces she distilled her solo dances. Her second book, "Lamb at the Altar: The Story of a Dance" (Duke University Press, 1994), documents the unique creative process that defined these works.

In the late 1990s Deborah Hay focused almost exclusively on rarified and enigmatic solo dances based on her new experimental choreographic method, such as "The Man Who Grew Common in Wisdom", "Voilà", "The Other Side of O", "Fire", "Boom Boom Boom", "Music", "Beauty", "The North Door" and "The Ridge, Room", performing them around the world and passing them on to noted performers in the US, Europe, and Australia. She also choreographed a duet for herself and Mikhail Baryshnikov, "Single Duet", which toured with the "Past/Forward" project in 2000.^[3]

Her third book, "My Body, the Buddhist" (Wesleyan University Press, 2000) is an introspective series of reflections on the major lessons of life that she has learned from her body while dancing.

Hay’s work has now reached a new stage, where she redefines the inimitable choreographic method of her solo pieces in collaboration with highly trained dancers. In 2004 she received a NYC Bessie award for her choreography of the quartet "The Match", which toured in Austin, Houston, London, Nottingham, Montpellier, and Paris in 2005.

Deborah Hay has collaborated with many artists from different areas, such as composers Pauline Oliveros, Alvin Lucier, Richard Landry, Terry Riley, Ellen Fullman, artist Tina Girouard, and Australian actor/playwright/director Margaret Cameron, among others. She has been the recipient of several grants and fellowships, including a 1983 Guggenheim Fellowship in choreography, numerous National Endowment for the Arts Choreography Fellowships, and the Rockefeller Foundation Bellagio Fellowship in 1996.

Deborah Hay has received many awards and honors. In 2007 she received a BAXten Award. The award was presented with the following words: “Your experimental work has remained alive & contemporary over four decades, inspiring your colleagues and peers and now - new generations of choreographers & performers. Your sustained commitment and your willingness to change course provides an example for others. Your articulate writing on the body & dance has had a profound impact on the field.” In October 2009 the Theater Academy in Helsinki, Finland, will confer on Deborah Hay an Honorary Degree of Doctor of Dance at the Doctoral Degrees Graduation Ceremony.

External links[link]

• [2] official site of Deborah Hay Dance Company
• [3] Deborah Hay Dance Theory Writings

Footnotes[link]

Kevin Nash
Nash 2010.
Ring name(s)	Diesel [1] Kevin Nash[1] Oz[1] (Master Blaster) Steel[2] Vinnie Vegas
Billed height	6 ft 10 in (2.08 m)[3]
Billed weight	328 lb (149 kg)[3]
Born	(1959-07-09) July 9, 1959 (age 52) Detroit, Michigan[1]
Resides	Ponce Inlet, Florida
Billed from	Detroit, Michigan,[1] "The Steele Mines" (as Master Blaster Steele), "Emerald City" (as Oz) North Scottsdale, Arizona
Trained by	Jody Hamilton[3]
Debut	September 14, 1990

Kevin Scott Nash (born July 9, 1959)^[1] is an American professional wrestler and actor. As of 2011, Nash is signed to a five year contract with WWE under their WWE Legends program.^[4] Nash has wrestled under several ring names, but is most notably known by his real name in World Championship Wrestling (WCW) and Total Nonstop Action Wrestling (TNA), and in the World Wrestling Federation (WWF)/World Wrestling Entertainment/WWE, where he has also been billed as Diesel.

Between WWE, WCW, and TNA, Nash has won a total of 21 championships. He is a six-time world champion: a five-time WCW World Heavyweight Champion, and one-time WWF Champion. He was the longest-reigning WWF Champion of the 1990s, having held the title for 358 days. He has achieved notable success in the tag team division as well, being a twelve-time world tag team champion: a nine-time WCW World Tag Team Champion, two-time WWF World Tag Team Champion and one-time TNA World Tag Team Champion. He is also a one-time WWF Intercontinental Champion and a two-time TNA Legends Champion. In addition to championships, he won the 1998 WCW World War 3. Nash was a member of The Kliq, a group which included Shawn Michaels, Triple H, Scott Hall and Sean Waltman. He is also one of the three founding members of the New World Order (nWo), along with Hulk Hogan and Scott Hall.

Early life[link]

Nash was born July 9, 1959, in Detroit, Michigan,^[1] Nash's father, Robert, died on 7 October 1968 when Nash was nine years old.^[5][6] On December 27, 1994, Nash's mother, Wanda, died after a four year struggle against breast cancer.^[1] He attended the University of Tennessee where he majored in psychology and minored in educational philosophy. At the University of Tennessee, Nash was a center for the Tennessee Volunteers basketball team. He remained on the team from 1979 to 1980, during which time the team made it to the NCAA Sweet 16.^[7] He did not play a fourth year for the Volunteers,^[8] and he attempted to transfer to Bowling Green State University in Bowling Green, Ohio. He later reconsidered and instead relocated to Europe, where he played basketball professionally for various teams.^[1] His career ended in 1981 in Germany (while playing for Gießen 46ers) when he tore his anterior cruciate ligament.^[8] With his basketball career over, Nash enlisted in the 202nd Military Police Company in Gießen, Germany and served in a secure NATO facility for two years, during which time he was promoted to the rank of specialist. After working on an assembly line at Ford Motor Company, he decided to try professional wrestling.^[9]

Professional wrestling career[link]

World Championship Wrestling (1990–1993)[link]

Nash debuted in WCW as the orange-mohawked "Steel", one half of the tag team known as the "Master Blasters".^[2] He was initially partnered with "Iron", who was later replaced by "Blade".^[2] The Master Blasters, however, disbanded within a year. In May 1991, Nash was repackaged as the silver-haired "Oz", a character based on the Wizard of Oz from the 1900 children's book The Wonderful Wizard of Oz.^[10] Oz, managed by Merlin the Wizard,^[10] was pushed strongly throughout early 1991; he squashed several wrestlers before losing to Ron Simmons at the Great American Bash on July 14.

Nash wrestled as Oz throughout the remainder of 1991. In January 1992, he was repackaged as "Vinnie Vegas", a wisecracking pseudo-mobster based on Steve Martin's character in the 1990 film My Blue Heaven.^[11] Vegas was quickly recruited into "A Half-Ton of Holy Hell", a stable of large wrestlers created by Harley Race which included Big Van Vader and Mr. Hughes. The stable separated in February 1992, and Vegas joined The Diamond Mine, a stable led by Diamond Dallas Page that also included The Diamond Studd and Scotty Flamingo.^[12][13] After Studd and Flamingo left the stable, Page and Vegas began teaming together as The Vegas Connection.^[12] The tag team split in late 1992, and Nash left the promotion in early 1993 to work for the World Wrestling Federation.

World Wrestling Federation[link]

Debut and Championship reigns (1993-1995)[link]

Nash (as Diesel) acted as Shawn Michaels's on-air bodyguard and tag team partner for two championship reigns.

In 1993, Nash left WCW, signing a contract with the World Wrestling Federation at the request of Shawn Michaels.^[14] He was given the stage name of "Diesel", with the character given the nickname "Big Daddy Cool". For the role, Nash dyed his beard and hair black. Taking on the appearance of a typical biker thug, Diesel sported black sunglasses and leather garments. The name of Diesel was a play on the fact that Nash was from Detroit, known famously as "The Motor City". To play off of his character's name, Nash's initial entrance music was a simple series of truck engine noises along with loud horns beeping.

Diesel started out as the bodyguard/best friend of Shawn Michaels. He made his WWF debut at a house show on June 6, 1993, assisting Michaels in defeating Marty Jannetty for the Intercontinental Championship.^[12] In January 1994, Diesel appeared at the Royal Rumble, eliminating seven men in under 18 minutes of in-ring time. Diesel won the Intercontinental Championship from Razor Ramon, following interference from Michaels on the April 13, 1994 edition of Superstars.^[12][15] The duo of Diesel and Michaels defeated The Headshrinkers to win the WWF Tag Team Championship on August 28, making Nash a double champion.^[12][16] The next night, Ramon defeated Diesel at SummerSlam to regain the Intercontinental Championship.^[12] The alliance between Diesel and Michaels dissolved after Survivor Series after Michaels accidentally superkicked Diesel. Diesel then gave chase to Michaels, and although he failed to catch him the reaction from the crowd turned him babyface. However, Nash was no longer a tag team champion, as Michaels' actions resulted in the team being forced to vacate the titles.

Nash (as Diesel)

On November 26, three days after Survivor Series, Diesel faced Bob Backlund for the WWF Championship he won at Survivor Series from Bret Hart. In the match, held at Madison Square Garden, Diesel defeated Backlund in an eight-second squash match.^[12][17] Diesel then promised Hart a match for his title, which they had at the 1995 Royal Rumble. The match ended in a draw due to interference from several wrestlers, including Shawn Michaels. Michaels was irate about his former bodyguard having beaten him to the WWF Championship and was sufficiently motivated to win the 1995 Royal Rumble later that evening, earning himself a title shot at WrestleMania XI.

At WrestleMania XI on April 2, Nash, accompanied to ringside by actress Pamela Anderson (who was supposed to valet for Michaels), defeated Michaels to retain the title. After the match he left the ring with both Anderson and Michaels' replacement for her, Jenny McCarthy. The next night on Monday Night Raw, Michaels was betrayed by his new bodyguard, "Sycho" Sid, prompting Diesel to come to his rescue. This occurrence led to the tag team being reunited, now known as "Two Dudes with Attitude". Diesel successfully defended the WWF title against Sycho Sid at the inaugural In Your House pay-per-view in Syracuse, New York, and at the In Your House 2: The Lumberjacks in Nashville, Tennessee. At SummerSlam 1995, Diesel retained the WWF title by defeating Mabel, who had won the 1995 King Of The Ring tournament.

On September 24 at In Your House 3 in Saginaw, Michigan, Diesel and Michaels challenged the reigning WWF Tag Team Champions Owen Hart and Yokozuna. The match had a winner-take-all stipulation, as in addition to the tag belts Diesel's WWF Championship and Michaels' recently won Intercontinental Championship were also on the line. When Hart did not show up at the event, he was replaced by Davey Boy Smith. In the course of the match, Hart arrived at ringside, entered the ring, and was pinned by Diesel for the win and the title, making him and Michaels holders of all three major WWF championships.^[16] The reign did not last long, however, as Hart and Yokozuna had the titles returned to them the next night due to Hart not being an official part of the match when pinned.

Various feuds and departure (1995–1996)[link]

Diesel's WWF Championship reign continued until November 19, when he was defeated by Bret Hart at the Survivor Series.^[12] Following the loss, Diesel attacked Hart. He later began a rivalry against fan favorite the Undertaker by costing him a potential victory in his match against Hart at the 1996 Royal Rumble. Diesel was the last wrestler eliminated in the Royal Rumble match by Shawn Michaels, which eventually led to a rift between the two men. At In Your House 6 in Louisville, Kentucky Diesel lost his steel cage match against WWF Champion Bret Hart when he was attacked by the Undertaker.^[12]

Shortly before WrestleMania XII, both Nash and Scott Hall, who played Razor Ramon, agreed to return to World Championship Wrestling as part of WCW President Eric Bischoff's drive to lure employees from the WWF to WCW with the offer of lucrative contracts. Diesel lost to The Undertaker at WrestleMania XII on March 31, then went on to feud with Shawn Michaels once again after he turned on him at a Madison Square Garden live event. In his last televised WWF appearance until 2002, Diesel challenged Michaels for the WWF Championship (which he had won from Hart at WrestleMania XII) at In Your House: Good Friends, Better Enemies on April 28. He wrestled Michaels for the title once again in a steel cage match at a house show on May 19, but was again defeated.^[18] After the match, Diesel, Michaels, Razor Ramon, and Hunter Hearst Helmsley, a group of off-screen friends known collectively as "The Kliq", hugged one another in the ring and wished each other farewell.^[18] This incident, later referred to as the "Curtain Call" or "MSG Incident", was a serious breach of character, as it showed heels and babyfaces consorting with one another.^[19] Shortly thereafter, with his obligations to the WWF now completely fulfilled, Nash left for WCW.^[18]

Return to World Championship Wrestling[link]

The Outsiders and New World Order (1996–1998)[link]

Nash, Scott Hall and Sean Waltman called themselves The Wolf Pac and made hand gestures the crowd are seen giving Nash here.

After two weeks of Scott Hall appearing on WCW programming and taunting announcers, wrestlers, and the company, Nash finally debuted alongside his friend on June 10, 1996. The duo were known as The Outsiders, and the storyline originally pushed them as "invaders" from the WWF (which WCW eventually had to scale back due to legal concerns from the WWF). At Bash at the Beach, Hall and Nash fought the team of Lex Luger, Sting, and Randy Savage and promised to add one more man to their entourage.^[12] With Hulk Hogan, they formed the New World Order (nWo).^[12]

Through late 1996 and into 1997, Nash normally teamed with Hall as the Outsiders, and they held the WCW Tag Team Championship.^[12] Nash also began to show his leadership qualities in the nWo, and became a sort of "second in command" alongside Hogan. Nash, Hall, and Sean Waltman distinguished themselves from the rest of the nWo, calling themselves the "Wolf Pac" in 1997.^[12]

nWo Wolfpac and World Heavyweight Champion (1998–1999)[link]

After a while, however, the nWo began to fight within its ranks, with Hogan and Nash battling for control. The situation came to a head on April 20, 1998, during a match between Hogan and recent nWo inductee (and rival) Randy Savage for Savage's recently won WCW World Heavyweight Championship. During the match, Nash interfered on Savage's behalf and jackknifed Hogan to the mat, signaling the breakup of the nWo into two separate factions (Nash's interference was not enough to prevent Hogan from regaining his championship, thanks to Bret Hart's interference shortly thereafter). Nash became the leader of nWo Wolfpac, alongside Savage, Curt Hennig, and Konnan. Hennig, however, shortly thereafter defected over to Hogan's nWo Hollywood faction. Then, during a match between Hall, Nash, Sting and The Giant (who had recently rejoined the nWo after being kicked out two years prior), Hall turned on Nash by hitting him with his tag team title belt and leaving the ring. The Wolfpac, however, was not down for long as Lex Luger joined Nash's team. Sting would eventually become a member as well, after being recruited heavily by both sides towards the middle of 1998. After Sting won Giant's half of the tag team title at the Great American Bash that June, Nash became Sting's partner.^[12] They defended the championship until July 20, when they were defeated by Hall and The Giant. Nash then set his sights on his former partner, and the rivalry came to a head at Halloween Havoc on October 25. During the course of the match, Nash jackknifed Hall twice but, instead of pinning him, left the ring and lost via count-out.

The following month at World War 3, Nash entered the 60-man, three ring battle royal that was a staple of the pay-per-view, with the winner getting a shot at the WCW World Heavyweight Championship at Starrcade the following month. Nash survived to the end after literally clearing his ring out and big booting Lex Luger, who had Scott Hall in the Torture Rack, over the top rope, and earned his shot at the title. At Starrcade, Nash capitalized on his opportunity and won the WCW World Heavyweight Championship from Goldberg, after Scott Hall shocked on Goldberg with a stun gun.^[12][20] In doing so, Nash broke Goldberg's long running undefeated streak.^[12]

nWo reunion (1999)[link]

On January 4, 1999, Nash and Goldberg were set to meet in a rematch, but the match did not happen because of Goldberg being arrested for stalking Miss Elizabeth. That night also marked the return of Hulk Hogan after his "retirement" two months prior. With Goldberg unable to wrestle, Nash challenged Hogan instead. In "The Fingerpoke of Doom," Hogan simply poked Nash in the chest, who proceeded to fall down and willingly allow Hogan to pin him for the title.^[12] The gesture marked the reunion of the feuding nWo factions into one.^[12] The return, however, was short lived, and by the mid-point of 1999, the nWo reunion was over.^[12] Meanwhile, backstage, Nash wrote some of the later angles for WCW. In his 2006 autobiography, Controversy Creates Cash, former WCW President Eric Bischoff criticized Nash's work ethic, dubbing him "Big Lazy" (a reference to Nash's nickname, "Big Sexy"). The name had previously been coined by The Honky Tonk Man on several radio interviews.