there are some evidences on elamite seals that show iranian people had enough knowledge to construct small dome on cylindrical spaces like silo in the third millennium bc. but the foundations of large dome over square spaces were formed in the parthian period. bazeh-hur dome chamber with the corners of wood in khorasan province is the most ancient dome from the sasanian dynasty. since the sasan...

(3) A return tube from the glass dome leads back to the top of the chamber. Air displaced from the chromatography tank by the incoming fluid escapes through the hole in the glass plate into the dome and passes via the return tube to the chamber, thus forming a completely closed system. Added rigidity is afforded by mounting the apparatus on a "tufnol" plate, to which the glass chamber, stopcock...

Lava dome eruptions commonly display fairly regular alternations between periods of high activity and periods of low or no activity. The time scale for these alternations is typically months to several years. Here we develop a generic model of magma discharge through a conduit from an open-system magma chamber with continuous replenishment. The model takes account of the principal controls on f...

Architecturally, the Seljuqs' dominion makes a significant shift from the Pre-Islamic Sassanid squinches into a sophisticated transition mechanism employed to change the walls of a square chamber to an octagonal base to set a dome which this initiated a new construction methodology to hybridize the previous experiences of Sassanid domes with new architectural tendencies since the previous under...

Abstract The 3D flow filling process of LOX (Liquid Oxygen) dome is studied in a liquid oxygen/methane rocket engine. volume, field pressure and velocity distributions oxygen at different time are determined. property propellant the injection characteristic obtained. results show that when has not been filled, state disorder, flows around annular wall middle dome. static near equalizing orifice...

Devices that degrade vision were applied to the left eyes of 3-day old chicks. The dome device affected the entire visual field, and the arch device, only the lateral field. Control chicks wearing a circumorbital ring and untreated chicks were also examined. The dome device produced -15D and the arch device -4D of mean refractive error, while the ring and untreated chicks were emmetropic. Morph...

We describe a case of femtosecond laser-assisted cataract surgery (FLACS) in an eye with multiple comorbidities, including retinal detachment surgery, high myopia, posterior chamber phakic intraocular lens (PC pIOL) and residual, emulsified, silicone oil located in the anterior chamber. FLACS was affected by the optical blockage, but the incomplete capsular tear was recoverable. The case sugges...

Abstract Wind-induced microphone noise complicates infrasound measurements considerably. A wind-shielding dome for signal-to-noise ratio improvement of acoustic pressure frequencies was designed and tested. The semi-spherical shape aimed at maximizing the averaging large atmospheric turbulent eddies while keeping structure reasonably compact. insertion loss measured in a semi-anechoic chamber (...

The Teide-Pico Viejo (T-PV) stratovolcanoes constitute one of the most potentially active volcanic complexes in Europe. T-PV was traditionally considered as a non-explosive system, but recent studies have pointed out explosive character their phonolitic magmas, including plinian and subplinian eruptions generation pyroclastic density currents, is evidenced volcanological record last 30 kyr. Thi...