I n this issue, we are privileged to have 2 state-of-the-art reviews on the topic of posttraumatic stress disorder (PTSD), written by preeminent authorities in the field. Dr Naomi Breslau provides a critical overview of the epidemiology of PTSD, highlighting sex differences and comorbidity. Dr Gordon Asmundson and colleagues’ insightful synthesis of the literature linking PTSD to chronic pain e...

a field experiment was conducted under controlled conditions in completely randomized factorial design with three soil application doses of zn sulphate and drought stress with three replications in chalus, mazandaran province, iran on 1th march, 2015. the treatments were included three amounts of zinc sulphate (0, 30 and 60 kg.ha-1) and three amounts of stress (90, 70 and 50% of field capacity)...

We propose a modification of the generalized gradient vector flow field techniques based on a continuous force field analysis. At every iteration the generalized gradient vector flow method obtains a new, improved vector field. However, the numerical procedure always employs the original image to calculate the gradients used in the source term. The basic idea developed in this paper is to use t...

The present paper discusses the formulation of weight functions for inclined edge cracks in finite width plates, typical Rolling Contact Fatigue defects, to obtain Stress Intensity Factor and T-stress. Because do not depend on load boundary conditions, their use is convenient study subjected complex stress fields, e.g. fretting fatigue rolling contact fatigue, since field calculated uncracked g...

A full-field digital gradient sensing method is proposed for measuring small angular deflections of light rays due to local stresses in transparent planar solids. The working principle of the method is explained, and the governing equations are derived. The analysis shows that angular deflections of light rays can be linked to nonuniform changes in thickness and refractive index of the material...

As already previously reported the EXCLI Journal closely cooperates with the Archives of Toxicology as a partner for articles focussing on basic and clinical research (Bolt, 2011; Bolt and Stewart, 2011). To give our readers an overview over current cutting-edge topics in toxicology we publish a compilation of brief ‘key messages’ from the most cited articles (Table 1). The citation ranking ill...

Mucociliary clearance is one of the major lines of defense of the human respiratory system. The mucus layer coating the airways is constantly moved along and out of the lung by the activity of motile cilia, expelling at the same time particles trapped in it. The efficiency of the cilia motion can experimentally be assessed by measuring the velocity of micro-beads traveling through the fluid sur...

in this paper, the problem of calculating the stress intensity factor (sif) for an orthotropic thick-walled cylinder with a small radial crack subject to internal pressure is considered. the crack is assumed to be an edge crack on the external radius of the cylinder. the stress intensity factor is calculated by superposition of an uncracked cylinder with uniform stress distribution and a cylind...

The stress transfer mechanism from a polymer substrate to a nanoinclusion, such as a graphene flake, is of extreme interest for the production of effective nanocomposites. Previous work conducted mainly at the micron scale has shown that the intrinsic mechanism of stress transfer is shear at the interface. However, since the interfacial shear takes its maximum value at the very edge of the nano...

A wind tunnel investigation was performed to study the flow field over a 70° swept sharped edge delta wing model at high angles of attack. The experiments were conducted in the subsonic wind tunnel at the Department of Mechanical Engineering, Sharif University of Technology. Velocity profiles have been measured using a special pitot tube and hot wire anemometer at angles of attacks of 10 to 35 ...