Instability

In numerous fields of study, the component of instability within a system is generally characterized by some of the outputs or internal states growing without bounds. Not all systems that are not stable are unstable; systems can also be marginally stable or exhibit limit cycle behavior.

In structural engineering, a structure can become unstable when excessive load is applied. Beyond a certain threshold, structural deflections magnify stresses, which in turn increases deflections. This can take the form of buckling or crippling. The general field of study is called structural stability.

Atmospheric instability is a major component of all weather systems on Earth.

Instability in control systems

In the theory of dynamical systems, a state variable in a system is said to be unstable if it evolves without bounds. A system itself is said to be unstable if at least one of its state variables is unstable.

In continuous time control theory, a system is unstable if any of the roots of its characteristic equation has real part greater than zero (or if zero is a repeated root). This is equivalent to any of the eigenvalues of the state matrix having either real part greater than zero, or, for the eigenvalues on the imaginary axis, the algebraic multiplicity being larger than the geometric multiplicity. The equivalent condition in discrete time is that at least one of the eigenvalues is greater than 1 in absolute value, or that two or more eigenvalues are equal and of unit absolute value.

Unstable (album)

Unstable is Adema's second and also final album to feature its original lineup with vocalist Mark Chavez departing from the band after its release and then again after their reunion. It was released on August 12, 2003. It has sold about 400,000 copies worldwide. Its radio single was the self-titled song "Unstable", which also had a music video, but it didn't get very much radio play. Many songs relied more on instrumentation and harmony instead of distortion in comparison to their previous album, but the album also has some of the band's most aggressive work. It was less successful than their first album, debuting at number 43 on the Billboard 200 before quickly falling off the chart.

Track listing

CD

All lyrics written by Mark Chavez, all music composed by Kris Kohls, Mike Ransom, Dave DeRoo & Tim Fluckey.

DVD

Credits

Unstable (song)

"Unstable" is the first single released from the Adema album, Unstable. It is featured in Madden NFL 2004

Success

10,000 copies of this single were sold in the first three weeks, making it Adema's second most successful single to date, bar "Giving In". This song is also one of Adema's most popular songs among fans, being one of the songs played at almost every show. The song is also featured on the soundtrack of Madden NFL 2004.

Music video

The music video depicts the band playing in a desert like location, with sandy gusts of wind billowing around them. The video occasionally cuts away to Mark Chavez, the lead vocalist, as he runs through a windy location, storm clouds everywhere, with a female floating around him. In the end, Chavez is lying on a roof protected from the wind. He reaches out to try and catch the female from driting away. In the end of the video, the house that Mark was lying on explodes, and quick-cuts of Mark Chavez and the woman holding hands are shown.

Éric

Éric ['eʁik] is a French masculine given name, the equivalent of English Eric. In French-speaking Canada and Belgium it is also sometimes unaccented, and pronounced "Eric" as English with the stress on the "i". A notable French exception is Erik Satie, born Éric, but who in later life signed his name "Erik" pronounced as in English.

As with Étienne, Émile, Édouard, Élisabeth, Édith the accent É is sometimes omitted in older printed sources, though French orthography is to include accents on capitals.

People named Éric

Richard Taylor (cartoonist)

Richard Taylor (1902–1970) was a Canadian cartoonist best known for his cartoons in the magazine The New Yorker. He signed his work Ric. Canadian comics historian John Bell called Taylor "one of the greatest New Yorker cartoonists".

Taylor was born in 1902 in Fort William, Ontario, in Canada. In the 1920s, he contributed to Toronto-based publications; he constirbuted for a year to Toronto Telegram newspaper, from 1927 to the University of Toronto's humour magazine The Goblin, and the Communist Party of Canada newspaper The Worker. Aside from cartooning, he produced commercial art and in his spare time painted. In 1935, The New Yorker began publishing his work, and he thereafter moved to the United States, where there were more opportunites for better pay for cartoonists. Taylor died in Bethel, Connecticut, in the United States in 1970.

References

Works cited

Further reading

RIC

Ric may refer to:

Companies

Royal

Codes and regulations

Science and mathematics

Other