The Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) has been used to observe 78 of the IRAS point sources identified by Bronfman et al. (1996) as likely ultracompact HII regions. Results for the CO J = 4 → 3 line at 461.041GHz are presented. The 74 sources detected are bright and in many cases compact, making them potentially suitable as pointing calibrators for single dish su...

It is indeed difficult to say that analogue controllers are definitely better than digital controllers. The point is, they both work. Analogue controllers are based on mechanical parts that cause changes to the process via the final control element. Again like final control elements, these moving parts are subjected to wear and tear over time and that causes the response of the process to be so...

The sliding of a sharp nanotip on graphene completely immersed in water is investigated by molecular dynamics (MD) and atomic force microscopy. MD simulations predict that the atomic-scale stick-slip is almost identical to that found in ultrahigh vacuum. Furthermore, they show that water plays a purely stochastic role in sliding (solid-to-solid) friction. These observations are substantiated by...

Pointing is a foundational building block of human communication, but does it take the same form from one culture to the next? Index finger pointing is often assumed to be universally privileged. Use of non-manual pointing morphologies has been attested around the world but it has never been clear how central these variants are in the communities in which they occur. Using a novel referential c...

The word “bent” has a special meaning to readers of THE BENT. In construction or architecture, a bent is a structural element used in post and beam construction. Its more common meaning brings to mind a shape like a rod or a line that seems headed one way but then takes a sudden turn. A common example is a stick held in water at an angle, partly immersed, partly in air. It appears bent. The exp...