Collapse

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collapse

[kə′laps]
(engineering)
Contraction of plastic container walls during cooling; produces permanent indentation.
(materials)
The flattening of cells in heartwood during drying or pressure treatment; often characterized by a caved-in or corrugated surface appearance.

Collapse

 

acute vascular insufficiency accompanied by a fall in arterial and venous blood pressure.

Collapse is a result of a disturbance of the regulation of vascular tonus and injury to the vascular walls through infection, intoxication, massive blood loss, severe dehydration, myocardial affection (acute myocardial infarction), and other pathological conditions. Collapse is characterized by a decrease of blood flow to the heart, a deterioration of the blood supply to the vital organs, and the development of hypoxia. The patient’s facial features become pinched and the eyes roll back. He becomes pallid, with sticky perspiration and cold extremities. If the patient is conscious, he lies immobile and indifferent to his surroundings. Breathing is superficial and accelerated. The pulse is rapid. The most accurate index of the gravity of the patient’s condition is the degree to which arterial pressure is lowered. Severe collapse may be a direct cause of death. Collapse is treated with the immediate use of agents that stimulate the vascular and respiratory centers and with vasoconstrictors, blood transfusions, and blood substitutes. Measures should also be directed toward the elimination of the primary causes of the collapse.

collapse

Mechanical failure of cells in wood, usually caused by abnormal or forced drying.
References in periodicals archive ?
THE partial collapse of the Victorian-era tunnel - which was formerly used by the Liverpool Overhead Railway - caused tons of rock to fall into an area which was being used as a car repair garage by Roscoe Engineering.
"Any creaking or cracking noises, or bowing in the attic," Farrell said, could be a sign of impending collapse and people should first get out of the structure and then call for assistance.
Naseem is facing two charges in a Health and Safety Executive prosecution relating to the collapse of Sunset Amusements at Southgate in Elland.
the camel may wobble or groan as the loading threshold approaches; however, when a single straw precipitates a spectacular collapse, everybody stands around with palms upward in stunned surprise!
JARED DIAMOND'S new book, Collapse: How Societies Choose to Fail or Succeed, is neither "superb" (The New Statesman), "incisive" (The Washington Post), "magisterial" (BusinessWeek), nor "insightful and very important" (Boston Herald).
Then, using some antennae that are fixed as well as others that can be moved around on a cart, the researchers map the strengths of the transmitters' signals outside the building, and across a range of frequencies, before, during, and after the collapse.
Second, the private sector tends to finance investments with debt during the market mania, and thus investors are overextended when a collapse comes.
It is also the case that the Communist Party has an object lesson in the perils of political reform in the collapse of the Soviet empire.
Another incident of lung collapse was reported in 2017 during a One Direction concert.
It said the collapse of the wall raised concern of possible collapse of the rest of wall, which could pose a serious risk to the Abu Rmeileh family living there.
The local government will request the budget to repair the site when the collapse stops, he said.
Less than a week later around 30 people are killed when a footbridge over a river in the northeastern state of Arunachal Pradesh collapses. 2007: Nepal and China In August in China at least 64 workers are killed when a river bridge in central Hunan province collapses as they are completing its construction.