One of the US Navy Band's ensembles performs in Wisconsin, 2009. Six performances by the Band were promoted to featured sound status. The Signpost thinks whoever pushed the bill through Congress to make US Government images and sound files free should be blessed; it has created a huge source of free cultural content.
This week's "Featured content" covers Sunday 15 – Saturday 21 May
New featured picture, of video game designer and producer Robin Hunicke
New featured picture showing the result of the photographic technique of focus-stack microscopy. Here, the result of "stacking" the component images is a single image of a microfossil, at the bottom, with a depth of field almost impossible to achieve at high magnification.
From this edition onwards, The Signpost will announce new administrators at the start of the "In brief" section at "News and notes".
Focus stack microscopy (nom; related article) of a diatom microfossil. Top left are the three source image slices at three focal depths. Top right are the contributions (black is no contribution, white is full contribution) of that focal slice to the final "focus stacked" image. At the bottom is the resulting focus-stacked image with an extended depth of field. Extended depth of field by focus stacking is a powerful tool for light microscopy as at high magnification the depth of field can be extremely shallow, down to around 1 μm. Stack Microscopy. (Created by User:Zephyris.)
"Be ye men of valour" (nom; related article), a radio recording of the original speech made by the former British Prime Minister Winston Churchill in 1940, nine days after first becoming Prime Minister. This was a response to the crisis that was happening in World War II, when the Germans had beaten the French and were apparently preparing to advance on Britain.
New featured picture: Polish user Orem's schematic of the grand piano, a design that has evolved continually over the 250-year history of the instrument, and which is still the subject of innovation. The labelled components are listed on the description page.