The propagation of an interfacial crack along a heterogeneous weak plane of a transparent Plexiglas block is followed using a high resolution fast camera. We show that the fracture front dynamics is governed by local and irregular avalanches with very large size and velocity fluctuations. We characterize the intermittent dynamics observed, i.e., the local pinnings and depinnings of the crack fr...

A versatile, inexpensive, easily constructed suction electrode system is described that can be used for routine exercises by the student on, or for demonstrations of, the electrophysiology of frog sciatic nerve and gastrocnemius and sartorius muscles. A disposable plastic syringe and a disposable pipette with Ag-AgCl wire comprise the suction electrode. Six readily manipulable electrodes are in...

Abstract Following the 2013/59/EURATOM Directive, Italian 101/2020 Decree Law lowered annual limit on equivalent dose to eye lens from 150 20 mSv for exposed workers, in order risk of radiation-induced cataract. Such a drastic reduction makes it very important perform accurate monitoring medical staff that works with ionizing radiation as interventional radiologists and cardiologists. The stand...

The existence of ®exural waves con­ ned to the free edge of a ®uid-loaded plate is established theoretically. Whereas analogous in vacuo edge waves exist for all parameter values, submerged plates are shown herein to support such waves only under very light ®uid-loading conditions. For example, thin plates of aluminium, brass or Plexiglas will not support edge waves in water, although edge wave...

The sculpture Memory and Mechanism by Maiya Geddes in collaboration with Rebecca Geddes depicts the neuroanatomical underpinnings of memory. An anthropomorphic hollowed mahogany sideboard is cut open and its interior exposed. Like a craniotomy, a silicon cast depicting blood vessels and dura lines the cover of the sideboard. A casting of clocks and piano hammers alludes to time and place cells ...

A tubular biofilter (TBF) which consisted of a closed chamber, a polyurethane sponge tube and a nutrient solution distributor was developed and evaluated under organic loading rates (OL) ranging from 18.7 to 149.3 gm(-3)h(-1) and gas empty bed residence times (EBRTs) of 30-5.0 s. Using toluene as model VOC, the startup of the TBF lasted approximately 7 weeks. The removal efficiency decreased fr...

With the rapid increase in oil and gas consumption in the world’s energy consumption structure, the pace of global oil–gas pipeline construction has accelerated. Pipeline accidents that cause huge economic losses occur frequently, so inspection and maintenance of oil and gas pipelines have become critical issues. This paper presents a helical-contact deformation measuring method based on a mult...

The nutrient removal using microalgae in wastewater has received more attention in the last years. Due to the optical loss of wastewater, the reactors for algae used in wastewater treatment, have a small depth and they need large surfaces (like open ponds). In this study it is proposed a novel photobioreactor with an internal illumination using LED lights and Plexiglas End-Lighten rods. The lig...

A system has been developed to describe and compare the maternal behavior of three species of microvine rodents within a naturalistic environment. The apparatus consists of two interconnected Plexiglas-based tables with a peat substrate and hay cover. A pregnant female and her mate are placed within the tables, once the female has shown a thirty percent weight gain and pups can be felt by palpa...