Abstract Mathematical methods take an important part in reconstruction technologies of radiographic image. Back projection, iterative, and analytical (Two-dimensional Fourier, Filtered Projection) are the most procedures for image reconstruction. Whenever there exists numerous projections, have a great performance speed accuracy due to these advantages they comprehensively used X-ray imaging. O...

discrete element method (dem) is extensively used for mathematical modeling and simulating the behavior of discrete discs and discrete spheres in two and three dimensional space, respectively. prediction of particles flow regime, power draw and kinetic energy for a laboratory or an industrial mill is possible by dem simulation. in this article, a new approach was used to assess the main paramet...

developing countries that have almost oil reserves have no enough mega projects' management ability, technology and finance resources to manage and finish a mega project. host countries for achievement these technologies and resources have to cooperate with foreign and international companies.  different contractual frameworks are used in conjunction with obtaining these technologies and c...

With a global prevalence of ~9%-12%, low back pain (LBP) is a serious public health issue, associated with high costs for treatment and lost productivity. Chronic LBP (cLBP) involves central sensitization, a neuropathic pain component, and may induce maladaptive coping strategies and depression. Treating cLBP is challenging, and current treatment options are not fully satisfactory. A new BioEro...

STUDY DESIGN An observational follow-up. OBJECTIVES To analyze the role of physical exercise and inactivity on the long-term outcome after active outpatient low back rehabilitation. SUMMARY OF BACKGROUND DATA There is considerable evidence documenting the efficacy of exercise in the conservative treatment of chronic low back pain, but the role of exercises after the guided treatment period ...

INTRODUCTION It has been well documented that individuals with chronic low back pain (CLBP) tend to exhibit different muscle activation patterns in the trunk musculature when compared with healthy individuals. Studies investigating the flexion relaxation phenomenon have observed the persistence of muscle activation during full trunk flexion in CLBP [1], while Silfies et al. [2] found that CLBP ...

background: the aim of this study was to evaluate the level of disability and pain intensity among two groups of governmental employees and sellers who suffering from chronic low back pain.  material and methods: this descriptive – analytic study was performed from dec 2015to mar 2016among employed staff members of education ministry (n=50) and 40 sellers with chronic low back pain who were sel...