purpose:  to evaluate the significance of the presence of pigment granules in  the anterior  vitreous as a reliable indicator of retinal breaks in patients with acute symptomatic posterior vitreous detachment  (pvd) . methods: this cross sectional study included 209 phakic patients with acute symptomatic pvd. the patients underwent anterior vitreous examination and fundoscopy. patients with dia...

In order to achieve integrated condition in the girth welding of high pressure natural gas transmission pipelines, the weld zones and its surrounding area should have good mechanical properties. Residual stresses are an important defect especially in the girth welding of the pipeline. In this study, two API X70 steel pipes (with spiral seam weld) of 56 inches outside diameter and 0.780 inch wal...

Drosophila embryonic dorsal-ventral polarity is defined by a maternally encoded signal transduction pathway. Gastrulation Defective, Snake, and Easter comprise a serine protease cascade that operates in the perivitelline space to generate active ligand for the Toll receptor, which resides in the embryonic membrane. Toll is activated only on the ventral side of the embryo. Spatial regulation of ...

In 2004, we evaluated the relative performance of 8-unit Lindgren multiple-funnel (funnel), Intercept panel (panel), and Colossus pipe (pipe) traps, baited with ethanol and ac-pinene lures, in catching saproxylic beetles (Coleoptera) in pine stands in northern Florida and western South Carolina. Panel traps were as good as, if not better than, funnel and pipe traps for catching Cerambycidae. In...

Performance was evaluated for a passive solar space heating system utilizing heat pipes to transfer heat through an insulated wall from an absorber outside the building to a storage tank inside the building. The one-directional, thermal diode heat transfer effect of heat pipes make them ideal for passive solar applications. Gains by the heat pipe are not lost during cloud cover or periods of lo...

The layout of irrigation water distribution networks is usually branched. In most of the previous studies pipe sizes of the network had been optimized assuming a predetermined layout of the distribution system. However, only few researches have focused on the simultaneous layout and pipe size optimization. In this study a hybrid approach is adapted for simultaneous layout and pipe size optimiza...

A temperature jump in the water traveling through a pipe is delayed by the absorption of heat into the pipe wall. The convective transport of heat by the water and the conductive exchange with the interior pipe wall are described by a singular micromodel. The limiting form is a distributed microstructure model, which is successively better approximated by simpler firstand second-order kinetic m...

Articles you may be interested in Chemiluminescent reactions in a heat‐pipe oven Th~ pr~ss.ure, density, .and velo~ity .distributions within a cylindrical heat-pipe oven are analyzed for I~VISCld: compressible flow m either the radial or axial direction. For sufficiently large but readdy attamable heat flows, density variations within the heat pipe as large as 50% which can lead to inaccuracies...

This paper presents the EXHOST-PIPE software: an extension of PIPE – Platform Independent Petri net Editor – that complies with our own specifications. The new version supports the two kinds of Petri nets we have developed: particle Petri nets and plan Petri nets. EXHOST-PIPE also supports colours, modularity, time, guards, differential equations. . . The Petri net player has been extended and ...

On page 108 of For Space, an impassioned book that discloses the theoretical and political challenges of thinking space, a map of part of the South-East of England is inscribed with a very simple if perhaps initially puzzling phrase: The phrase recalls Rene Margritte’s famous inscription below a painting of a pipe: ‘ceci n’est pas une pipe’ (this is not a pipe). Initially, like Margritte’s phra...