It’s not the whole truth though, as [Albert van Dalen] demonstrates with his tube preamplifier running from only 3.3 V. If your first thought is that he must have made a flyback converter to ...

[Justin Scott]’s tube preamplifier is a great example, with its novel use of a pair of Nixie tubes to indicate the volume to which it has been set. The audio side of the preamp comes courtesy of ...

"This makes the task of planning missions much simpler. We think of it as a tube map for space." In recent decades, space missions have increasingly relied on the ability to change the course of a ...

In 2019, our team began to look in these subterranean locations – and in a new study published today in PLoS ONE, we report on the first documented occupation of a lava tube in the Arabian ...

Rock art and faunal records attest to the pastoralist use of the lava tube and surrounding areas, painting a vivid picture of ancient lifeways. Depictions of cattle, sheep, goat and dogs ...

Anthony Sinclair, a professor of archaeological theory and method at the University of Liverpool in the U.K., said in an email that in addition to providing shelter, the lava tube also would have ...