an experimental study was carried out on the wake of a cylinder on the back of which a plate is installed parallel to the fluid flow, with different terminal angles, where the reynolds number is 50000. at the end of the plate, blades with the height of 0.25 equal to the cylinder diameter and with 45, 90 and 135 degrees angle from the horizon, are installed where the cylinder diameter is equal t...

Objective: Two main issues in protecting radiation workers and the general public from 18F radiation—distance from and lead shielding for an 18F source—were investigated. We also examined the effect of an 18F source on the counting rate of a neighboring -camera. Methods: The dose rates of an 18F vial and a water-filled cylinder were measured using an ionization chamber at different distances wi...

Target audience This abstract is intended for microstructure modeling community, in particular for axon diameters inference Purpose We here propose to study the reason for the systematic overestimation of the smaller radius in available axon diameter mapping techniques such as AxCaliber [1] or ActiveAx [2]. In these studies, white matter is decomposed using the CHARMED model relying on the use ...

Background and Aim: Bone density is of great assistance in the selection of the proper implant site. The present study aimed to assess the correlation between tissue densities in computed tomography (CT) and three different cone-beam computed tomography (CBCT) units. Materials and Methods: In this descriptive study, a radiographic phantom consisting of a transparent polymethyl methacrylate (PM...

We present deep V I images obtained with the Advanced Camera for Surveys on board the Hubble Space Telescope, covering three fields in the north-east side of the edge-on disk galaxy NGC 891. The observed fields span a wide range of galactocentric distances along the eastern minor axis, extending from the plane of the disk to 12 kpc, and out to ∼ 25 kpc along the major axis. The photometry of in...

Scattering rates arising from the interactions of electrons with bulk longitudinal optical (LO) phonon modes in a hollow cylinder are calculated as functions inner radius and uniform axial applied magnetic field. Now, specific nature electron-phonon mainly depends on character energy spectrum electrons. As is well known, cylindrical quantum wires, application parallel field lifts double degener...