Fine particulate matter is classified as a first-class carcinogen and receiving global attention. In particular, (PM2.5, PM10) are more fatal in students at growing age while their respiratory system develops than ordinary adults. During school hours, the main entrance often left open for convenience of staff. this situation, inflow PM2.5 through increases significantly. Thus, air curtains wide...

This paper examines two-dimensional liquid curtains ejected at an angle to the horizontal and affected by gravity surface tension. The flow is, leading order, shearless viscosity, negligible. Froude number is large, so that radius of curtain's curvature exceeds its thickness. Weber close unity, forces inertia tension are almost perfectly balanced. An asymptotic equation derived under these assu...

The goal of this study was to identify the factors that limit the survival of the red-eared slider turtle Trachemys scripta during long-term anoxic submergence at 3 C. We measured blood acid-base status and tissue lactate and glycogen contents after 13, 29, and 44 d of submergence from ventricle, liver, carapace (lactate only), and four skeletal muscles. We also measured plasma Ca , Mg , Na , K...

Oblique (non-vertical) liquid curtains are examined under the assumption that Froude number is large. As shown previously [E. S. Benilov, “Oblique with a large number,” J. Fluid Mech. 861, 328 (2019)], their structure depends on Weber number: if We < 1 (strong surface tension), Navier–Stokes equations admit asymptotic solutions describing bending upward, i.e., against gravity. In present...

Sign on the wall of El Santuario de Chimayo, New Mexico T his place feels old beyond human recollection. The carvings and paintings were surely done by human hands, but no one remembers whose hands those were. The work is striking, especially in the apse behind the altar. There, the colors of surrounding hills have been transferred onto nearly luminous wooden reredos full of Catholic symbolism....