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.

Sandy (log canoe)

The Sandy is a Chesapeake Bay log canoe. She measures is a 28'-1¹⁄₄" long sailing log canoe with two masts and a racing rig. Log-built, with carvel-fitted rising planks, the boat has a beam of 6'-8¹⁄₄". She one of the last 22 surviving traditional Chesapeake Bay racing log canoes that carry on a tradition of racing on the Eastern Shore of Maryland that has existed since the 1840s. She is located at Sherwood, Talbot County, Maryland.

She was listed on the National Register of Historic Places in 1985.

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Sandy (novel)

Sandy is the third book written by Alice Hegan Rice, and was the second best-selling novel in the United States in 1905. It was originally published in serial form in The Century Magazine from December 1904 through May 1905, and first appeared in novel form in April 1905.

The novel is based on the boyhood stories of S. S. McClure, publisher of McClure's magazine, and his upbringing in Ireland and early struggles in the United States.

Plot

A contemporary synopsis of the novel's plot describes it as follows:

This is the story of a young Irish boy named Sandy Kilday, who at the age of sixteen, being without home or relatives, decides to try his luck in the new country across the sea. Accordingly, he slips aboard one of the big ocean liners as a stowaway, but is discovered before the voyage is half over and in spite of his entreaties is told he must be returned by the next steamer. Sandy, however, who has a winning way and sunny smile, arouses the interest of the ship's doctor, who pays his passage and gives him some money with which to start his new life. On the voyage Sandy has made friends with a lad in steerage named Ricks Wilson, who earns his living by peddling, and he decides to join him in this career. Sandy has also been deeply impressed by the face of a lovely young girl who is one of the cabin passengers and when he discovers that she is Miss Ruth Nelson of Kentucky he decides to make that state his destination. He and Ricks remain companions for sometime although Sandy's strong sense of honor causes disagreements as to the methods of their dealings. Sandy finally becomes disgusted with this life and after catching a glimpse of Ruth at a circus, where he is dispensing his wares in a humorous manner, he decides to abandon it altogether.

Sandy (given name)

Sandy is a popular unisex name; the male version can be a diminutive of "Alexander," "Alasdair," "Sandipan", "Sanford," or "Santiago," while the female version is a diminutive for "Sandra" or less commonly "Alexandra" and "Cassandra". The female name may also be spelled "Sandi" or "Sandie".

Notable people named Sandy include:

Women

Men