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Failed aluminium electrolytic capacitors with open vents in the top of the can, and visible dried electrolyte residue (reddish-brown color) The capacitor plague was a problem related to a higher-than-expected failure rate of non-solid aluminium electrolytic capacitors between 1999 and 2007, especially those from some Taiwanese manufacturers, [1] [2] due to faulty electrolyte composition that ...
Bubonic plague is a variant of the deadly flea-borne disease plague, which is caused by the enterobacteria Yersinia pestis, that devastated human populations beginning in the 14th century. Bubonic plague is primarily spread by fleas that lived on the black rat, an animal that originated in South Asia and spread to Europe by the 6th century. It ...
Historical geography is the branch of geography that studies the ways in which geographic phenomena have changed over time. [1] In its modern form, it is a synthesizing discipline which shares both topical and methodological similarities with history , anthropology , ecology , geology , environmental studies , literary studies , and other fields.
Distribution of plague infected animals and people, as of 1998. Plague cases were massively reduced during the second half of the 20th century, but outbreaks still occurred, especially in developing countries. Between 1954 and 1997, human plague was reported in 38 countries, making the disease a re-emerging threat to human health. [65]
Advanced Placement (AP) Human Geography (also known as AP Human Geo, AP Geography, APHG, AP HuGe, APHug, AP Human, HuGS, AP HuGo, or HGAP) is an Advanced Placement social studies course in human geography for high school, usually freshmen students in the US, culminating in an exam administered by the College Board. [1]
John Snow (15 March 1813 – 16 June 1858 [1]) was an English physician and a leader in the development of anaesthesia and medical hygiene.He is considered one of the founders of modern epidemiology and early germ theory, in part because of his work in tracing the source of a cholera outbreak in London's Soho, which he identified as a particular public water pump.
Between 1301 and 1325, during the Great Famine it was 29.84 years, but between 1348 and 1375 during the Plague, it was only 17.33 years. [3] It demonstrates the steep population drop between 1348 and 1375 of about 42%. [4]
More than 80 different theories or variations of theories attempting to explain the Classic Maya collapse have been identified. [10] From climate change to deforestation to lack of action by Maya kings, there is no universally accepted collapse theory, although drought has gained momentum in the first quarter of the 21st century as the leading explanation, as more scientific studies are conducted.