this article studied static deflection, natural frequency and nonlinear vibration of a clamped-clamped microbeam under discontinues electrostatic actuation. the electrostatic actuation was induced by applying ac-dc voltage between the microbeam and electrode plate. in contrast to previous works, it was assumed that length of the electrode plate was smaller than that of the microbeam. in additio...

The equilibrium measure of a compact plane set gives the steady state distribution of charges on the conductor. We show that certain moments of this equilibrium measure, when taken about the electrostatic centroid and depending only on the real coordinate, are extremal for an interval centered at the origin. This has consequences for means of zeros of polynomials, and for means of critical poin...

The most frequent precipitants of photic- or pattern-induced seizures are television and discotheque lighting effects. Seizure induction by reflection of bright sunlight on water surfaces has also been reported. We report a patient with seizures induced by the sight of moving water in the absence of bright sunlight. [Published with video sequences].

This corrigendum corrects article "Risks, precipitants and clinical presentation of gastro-oesophageal reflux disease at the Kilimanjaro Christian Medical Centre in Tanzania". Pan Afr Med J. 2014 Oct 1;19:119. doi: 10.11604/pamj.2014.19.119.3575.[This corrects the article DOI: 10.11604/pamj.2014.19.119.3575.].

Simian immunodeficiency virus matrix protein has been crystallized from Tris-HCl buffer with polyethylene glycol and isopropanol as precipitants. The crystals belong to space group C2 with unit cell dimensions a = 69.9 A, b = 115.2 A, c = 32.5 A, beta = 108.1 degrees and diffract X rays to a minimum Bragg spacing of 2 A. These crystals appear suitable for a high resolution structure analysis.

Stroke mimics can account for up to 5% of all acute stroke presentations.They are more frequent in those under 50 years of age, with some estimates of prevalence as high as 21% of acute stroke presentations in this age group. We describe a case of repetitive stroke mimic episodes, the recognised associated precipitants, diagnostic clues and management.

the effects of substituents on the symmetry and the nature of halogen bonds in [n∙∙∙x∙∙∙n]+-type systems are presented for the yc5h4n∙∙∙x∙∙∙nc5h5 (y = no2, cn, h, ch3, och3, oh, nh2, x = cl, br, i) complexes. some structural parameters, energy data and electronic properties were explored with the density functional theory (dft) calculations. in addition, electrostatic potentials were used in es...

The particles emitted from diesel engine exhaust have low resistivity and extremely small in the range of 70-120nm. An electrostatic precipitator (ESP) has been extensively used for the collection of these particles. A two-stage ESP using charging section and collection section has been installed for the collection of diesel particles and improving the visibility index in road tunnels. The char...