final step of rail manufacturing is cold rolling straightening process and it hassignificant effects on mechanical properties, straightness, flatness and development of residualstresses. measurement of residual stresses after straightening process is obligated by railmanufacturing standards. in the present investigation, an attempt has been made to evaluateresidual stresses after straightening ...

Many researchers content themselves with the 2D simulation of welding process instead of the 3D simulation, because of the time and the cost factors of the latter. In this research, the number of elements and nodes are reduced by an initiative plan (defining an equivalent model) for the simulation of welding. The welding process has been simulated by an uncoupled thermal-mechanical finite eleme...

During the First World War soldiers from all combatant nations suffered from a wide range of debilitating nervous complaints as a result of the stresses and strains of modern warfare. War psychiatrists struggled to manage these complaints and shell-shocked men struggled to ensure that they had decent treatment and proper pensions. In each country the politics of shell shock differed but, regard...

The predatory cladocerans, Leptodora kindtii (Focke, 1844) and Bythotrephes longimanus (Leydig, 1860), express markedly different life-history traits. Leptodora produce small-bodied neonates that mature at small sizes but continue to grow throughout life. Bythotrephes produce larger neonates in both relative and absolute terms that grow rapidly to a large size at maturity whereupon they curtail...

in this research, a novel method to decrease micro-residual stresses of fibrous composites by adding carbon nanotubes (cnts) is proposed in detail. the negative coefficient of thermal expansion and the high young’s modulus of cnts can be utilized to counterbalance the process induced residual stresses in composites. to this end, first, the effects of adding cnts to the matrix of fibrous composi...

introduction: hypertension (htn) is one of the most common risk factors of cardiovascular diseases in adults and it is clear that htn in adults starts from the childhood. cardiovascular diseases in adults can be decreased by determining and controlling risk factors on blood pressure (bp) in children. this study evaluated & investigated the risk factors & determinants respecting blood pressure i...

Dilute Laponite suspensions in water at low salt concentration form repulsive colloidal glasses which display physical aging. This phenomenon is still not completely understood and in particular, little is known about the connection between the flow history, as a determinant of the initial state of the system, and the subsequent aging dynamics. Using a stress controlled rheometer, we perform st...

the speed of the development and changes of technology is so fast and astonishing that causes the increase of stress and diminishing societies health. there are some factors involved in the creation of the stress. those factors included as the stresses caused by external factors of the organization internal factors of the organization, collective and individual stresses. the relationship betwee...

trissolcus grandis (thomson) (hymenoptera: scelionidae) is the most important egg parasitoid of the common sunn pest, eurygaster integriceps puton (hemiptera: scutelleridae) in iran. demographic characteristics may be used for preliminary screening of parasitoid species or populations as well as for predicting their efficiency under different physical conditions in the field. in this study, the...

doctor shoja-ad-din sheikholeslamzadeh (also known as dr. sheikh) (1931-2014) was an outstanding orthopedic surgeon. he is credited for the establishment of the iranian association of rehabilitation, shafa yahyaian hospital as an orthopedic and rehabilitation center, the social welfare organization, iran’s emergency dispatch center (115) and many other major projects that led to the upgrading o...