Background and objectives: Primary dysmenorrhea has remained a health problem. This study has compared the effect of oral and topical ginger on severity and duration of primary dysmenorrhea.  Methods: A single-blind randomized trial was conducted on 70 female students with moderate and severe primary dysmenorrhea. The participants were stratified randomized bet...

This study aims to investigate and optimize the effects of the main parameters including the particle size, gravity and magnetic separation combination, high gradient magnetic separation, magnetic field intensity, shaking table slope, washing water flow, and electrostatic separation upon the rare earth element (REE) recoveries from iron mine waste. The electron microprobe showed that high amoun...

This paper addresses the optimum dynamic balancing of planar parallel manipulators exemplified with a 2 DOF parallel manipulator articulated with revolute joints. The dynamic balancing is formulated as an optimisation problem such that while the shaking force balancing is accomplished through analytically obtained balancing constraints, an objective function based on the sensitivity analysis of...

this paper addresses the validity of two hypotheses concerning changes of vowel quality in persian. the theory of centralization claims that there is a strong correlation between vowel duration and vowel quality. as vowel duration is shortened in unstressed contexts, the size of the vowel inventory reduces toward the center, leading to considerable overlap between different categories and a red...

Background: Breath-holding spells (BHS) is a sudden and reflexive phenomenon that is common in infancy and early childhood. Despite the harmless nature of BHS, being subjected to this phenomenon is very stressful for parents and sometimes requires treatment. In this study, we evaluated the efficacy of fluoxetine therapy (as an anxiolytic medication) on ​​pediatric BHS....

Horizontal head-shaking may induce nystagmus in peripheral as well as central vestibular lesions. While the patterns and mechanism of head-shaking nystagmus are well established in peripheral vestibulopathy, they require further exploration in central vestibular disorders. To define the characteristics and mechanism of head-shaking nystagmus in central vestibulopathies, we investigated spontane...