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from article Computer virus
Some viruses are more destructive than others, causing devastation or theft of data. (Credit: iStockphoto.com/Zmeel Photography)
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from article Computer virus
Purposes for creating viruses.
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from article Computer virus
Daily virus threats experienced by large organizations.
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from article Computer virus
Examples of vulnerabilities to computer viruses.
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from article Computer programming
Program code. (Credit: Max Delson Martins Santos/Getty Images)
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from article Teleconferencing
A typical teleconference. (Courtesy of Lifesize, www.lifesize.com)
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from article Dendrochronology
Ring patterns showing complacent and sensitive ring series. (a) Climate has minimal effect on ring widths when trees have ample moisture every year. (b) Maximum ring-width variations occur on sites where growth is limited by factors that vary from…
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from article Dendrochronology
Core being taken from a tree with an increment borer. (Courtesy of Laboratory of Tree-Ring Research, University of Arizona)
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from article Dendrochronology
Chronology building. Chronologies are extended backward in time by matching patterns of wood samples whose ages overlap.
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from article Dendrochronology
Skeleton plot (top) from an idealized tree-ring sequence in a specimen (bottom). Ring widths are represented by vertical lines in inverse proportion; that is, tall lines represent narrow rings. An exceptionally wide ring is designated by the letter…
