background: osteoporotic compression vertebral fractures are common clinical problems. in those with refractory fractures, percutaneous cement augmentation has been suggested. the aim of this study was to evaluate the functional outcome of percutaneous vertebroplasty in iranian patients with refractory osteoporotic fractures. methods: we retrospectively studied 37 osteoporotic fractures in 28 p...

background: in patients undergoing mechanical ventilation, mucus production and secretion is high as a result of the endotracheal tube. because endotracheal suction in these patients is essential, chest physiotherapy techniques such as expiratory rib cage compression before endotracheal suctioning can be used as a means to facilitate mobilizing and removing airway secretion and improving alveol...

brown tumors may occur secondary to hyperparathyroidism in patients with chronic renal failure (ckd). they are increasingly rare because hyperparathyroidism in now diagnosed and treated at an early stage. we report 67-year-old man who had been on hemodialysis for crf for over 3 years, who presented with back pain over the thoracolumbar junction from 2 years ago and because of pain he could not ...

in the hot compression test friction has a detrimental influence on the flow stress through the process and therefore, correcting the deformation curve for real behavior is very important for both researchers and engineers. in this study, a series of compression tests were simulated using abaqus software. in this study, it has been employed the taguchi method to design experiments by the factor...

Shift spaces with the specification property are intrinsically ergodic, i.e. they have a unique measure of maximal entropy. This can fail for shifts with the weaker almost specification property. We define a new property called one-sided almost specification, which lies in between specification and almost specification, and prove that it guarantees intrinsic ergodicity if the corresponding mist...

This paper introduces a fast stochastic surrogate modeling technique for the frequency-domain responses of linear and passive electrical electromagnetic systems based on polynomial chaos expansion (PCE) principal component analysis (PCA). A rational PCE model provides high accuracy, whereas PCA allows compressing model, leading to reduced number coefficients estimate thereby improving overall t...

researchers are of the belief that employee voice has favorable effects for both the employee and the organization. however, the effect of employee voice on creativity, and the process through which it influences creativity, has hitherto received little attention. this study aimed at investigating the relationship between perceived employee voice and creativity. employees of three premier dairy...