Media Category: STEM

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PCB_Printed_Circuit_Board

January 16, 2022 5:44 pm EST Richard Doud 0

This picture shows (left) a printed circuit board (PCB) layout, created on a computer and (right) the manufactured board, populated with parts. Both through-hole and surface mounts components have been used; the board is double-sided, with through-hole plating, green solder resist, white solder paste (visible on unsoldered holes, such as the four corner mounting holes and the nine holes down the right hand side of the board) and white silkscreen printing. Photo by
Mike1024. Public domain. …

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Lituya_Bay_map

January 9, 2022 10:13 pm EST Richard Doud 0

During the earthquake, the bay side of Gilbert and Crillon inlets moved about 20 feet northwest relative to the northeast wall that forms the head of the bay. The Sunmore (S) and Badger (B) were anchored in Anchorage Cove, while the Edrie (E) was anchored in the small cove behind the Paps hills. Map credit: Don J. Miller, Giant Waves in Lituya Bay, Alaska. Published by United States Department of the Interior, Geological Survey, 1960. …