Centrality indices assign values to the vertices of a graph such that vertices with higher values are considered more central. Triggered by a recent result on the preservation of the vicinal preorder in rankings obtained from common centrality indices, we review and extend notions of domination among vertices. These may serve as building blocks for new concepts of centrality that extend more di...

Background: Appropriate sensory excitation can improve brain synaptic contact and establish consciousness. Aim: The aim of this study was to investigate the sensory excitation delivered by family members and nurses on the level of consciousness in patients who are admitted to ICU. Method: In this clinical trial, 69 patients admitted to ICU in Ashair and Shafa Hospital, Khorammabad, were randoml...

OBJECTIVES To compare the efficacy of the Epley maneuver with that of a placebo maneuver in patients presenting to the emergency department (ED) with benign positional vertigo (BPV). METHODS This was a prospective, randomized, single-blind placebo-controlled trial. Consecutive adult ED patients presenting to a university teaching hospital with BPV were randomized to treatment with either the ...

An acutely vertiginous 47-year-old woman presented to the emergency department with simultaneous acute left neurolabyrinthitis and left posterior canal benign paroxysmal positional vertigo (BPPV). Gaze nystagmus from the neurolabyrinthitis hampered diagnosis of the BPPV. However, once the BPPV was identified and treated, the patient's subjective vertigo improved rapidly. Concomitant BPPV should...

This paper investigates the parametric excitation of a micro-pipe conveying fluid suspended between two symmetric electrodes. Electrostatically actuated micro-pipes may become unstable when the exciting voltage is greater than the pull-in value. It is demonstrated that the parametric excitation of a micro-pipe by periodic (ac) voltages may have a stabilizing effect and permit an increase of the...

Europium (Eu) doped ZnO microsphere based nano-sheets were synthesized through hydrothermal method. Effects of different concentrations of Europium on structural and optical properties of ZnO nano-sheets were investigated in detail. Prepared un-doped and Eu-doped ZnO samples were characterized using X-Ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron micro...