Shock (mechanics)

A mechanical or physical shock is a sudden acceleration caused, for example, by impact, drop, kick, earthquake, or explosion. Shock is a transient physical excitation.

Shock describes matter subject to extreme rates of force wtr to time. Shock is a vector that has units of an acceleration (rate of change of velocity). The unit g (or g) represents multiples of the acceleration of gravity and is conventionally used.

A shock pulse can be characterised by its peak acceleration, the duration, and the shape of the shock pulse (half sine, triangular, trapezoidal, etc.). The Shock response spectrum is a method for further evaluating a mechanical shock.

Shock measurement

Shock measurement is of interest in several fields such as

Acute stress reaction

Acute stress reaction (also called acute stress disorder, psychological shock, mental shock, or simply shock) is a psychological condition arising in response to a terrifying or traumatic event, or witnessing a traumatic event. It should not be confused with the unrelated circulatory condition of shock, or the concept of shock value.

"Acute stress response" was first described by Walter Cannon in the 1920s as a theory that animals react to threats with a general discharge of the sympathetic nervous system. The response was later recognized as the first stage of a general adaptation syndrome that regulates stress responses among vertebrates and other organisms.

Signs and symptoms

Common symptoms that sufferers of acute stress disorder experience are: numbing; emotional detachment; muteness; derealization; depersonalization; psychogenic amnesia; continued re-experiencing of the event via thoughts, dreams, and flashbacks; and avoidance of any stimulation that reminds them of the event. During this time, they must have symptoms of anxiety, and significant impairment in at least one essential area of functioning. Symptoms last for a minimum of 2 days, and a maximum of 4 weeks, and occur within 4 weeks of the event.

CSI: Miami (season 4)

The fourth season of CSI: Miami premiered on CBS on September 19, 2005 and ended May 22, 2006. The series stars David Caruso and Emily Procter.

Description

With a mole in their midst, Horatio and Calleigh head a team of elite Crime Scene Investigators as they enter their most challenging season yet. Under the roof of a state-of-the-art redesigned crime lab, the dynamic duo investigate a series of crimes including a night-club murder, the death of a pool boy, a cold case rape, and a murder with a double-jeopardy clause, all whilst under the scrutiny of an anonymous mole, and facing a series of cases that threaten the team. With Alexx accused of murdering a child molester, Horatio accused of murdering an innocent woman, Wolfe facing the loss of his eye, and Mac Taylor joining the team when a prisoner transfer goes awry, it's ultimately Delko that faces the greatest loss, when his sister is gunned down by the Mala Noche gang in an attack that will begin a narrative that will recur throughout the next several seasons.

Cyberpunk derivatives

A number of cyberpunk derivatives have become recognized as distinct subgenres in speculative fiction. These derivatives, though they do not share cyberpunk's computers-focused setting, may display other qualities drawn from or analogous to cyberpunk: a world built on one particular technology that is extrapolated to a highly sophisticated level (this may even be a fantastical or anachronistic technology, akin to retro-futurism), a gritty transreal urban style, or a particular approach to social themes.

The most successful of these subgenres, Steampunk, has been defined as a "kind of technological fantasy", and others in this category sometimes also incorporate aspects of science fantasy and historical fantasy. Scholars have written of these subgenres' stylistic place in postmodern literature, and also their ambiguous interaction with the historical perspective of postcolonialism.

American author Bruce Bethke coined the term "cyberpunk" in his 1980 short story of the same name, proposing it as a label for a new generation of punk teenagers inspired by the perceptions inherent to the Information Age. The term was quickly appropriated as a label to be applied to the works of William Gibson, Bruce Sterling, John Shirley, Rudy Rucker, Michael Swanwick, Pat Cadigan, Lewis Shiner, Richard Kadrey, and others. Science fiction author Lawrence Person, in defining postcyberpunk, summarized the characteristics of cyberpunk thus:

Punk subculture

The punk subculture, which centres on punk rock music, includes a diverse array of ideologies, fashions and forms of expression, including visual art, dance, literature and film. The subculture is largely characterized by anti-establishment views and the promotion of individual freedom. The punk subculture is centered on a loud, aggressive genre of rock music called punk rock. It is usually played by small bands consisting of a vocalist, one or two electric guitarists, an electric bassist, and a drummer.

Although punks are frequently categorised as having left-wing or progressive views, punk politics cover the entire political spectrum. Punk-related ideologies are mostly concerned with individual freedom and anti-establishment views. Common punk viewpoints include anti-authoritarianism, a DIY ethic, non-conformity, direct action and not selling out.

There is a wide range of punk fashion, in terms of clothing (including deliberately offensive T-shirts, leather jackets, Doc Marten boots, etc.), hairstyles (including brightly colored hair, spiked hair, mohawks, etc.), cosmetics, tattoos, jewelery and body modification. Early punk fashion adapted everyday objects for aesthetic effect, such as T-shirts, leather jackets (which are often decorated with painted band logos, pins and buttons, and metal studs or spikes), and footwear such as Converse sneakers, skate shoes, brothel creepers, or Dr. Martens boots. Hardcore punk fans adopted a dressed-down style of T-shirts, jeans, combat boots or sneakers and crewcut-style haircuts. Women in the hardcore scene typically wore masculine clothing.

Punk (fireworks)

A punk is a smoldering stick used for lighting firework fuses. It is safer than a match or a lighter because it can be used from a greater distance and does not use an open flame. They are made of bamboo and a brown coating of dried manure or compressed sawdust. Punks often resemble sticks of incense, and in some countries actual incense sticks are used in a similar fashion. Punks are sold at nearly all firework stands and many stands will include them for free with a purchase.

See also

Rasmus

Rasmus may refer to:

People with surname Rasmus

See also