My original query some time ago – one computer crash ago was about the amplitude probability density function (pdf) of surface EMG data (from which we have subtracted the mean value). That is, if one plots the amplitude of the rectified EMG in an histogram, what does it look like? The common assumption is that we get a (one-sided) Gaussian pdf for stationary data. This is generally so. However,...

High resistance of biofilms for chemical challenges is a serious industrial and medical problem. In this work a gradient of surface covered with biofilm has been produced and correlated to the effectiveness of different commercially available oxidative biocides. The results for thin Escherichia coli biofilms grown in rich media supplemented with glucose or lactose on glass or poly methyl methac...

We present initial results from a field survey for extremely red objects (EROs, defined here as (R-K ) ≥ 6) covering 154 square arcminutes of sky, from the first of 7 deep, wide-field K ′ images obtained as part of the Calar Alto Deep Imaging Survey (CADIS). The 5σ point source detection limits are K ′ = 20. 5 and R = 25. 0, while extended-source limits are up to 0. 50–0. 75 brighter. We identi...

We compare the dynamical properties of two galaxies at identical positions on the Tully-Fisher relation, but with different surface brightnesses. We find that the low surface brightness galaxy UGC 128 has a higher mass-to-light ratio, and yet has lower mass densities than the high surface brightness galaxy NGC 2403. This is true for the gas surface density, the stellar surface density, and the ...

We prove that the integrated density of surface states of continuous or discrete Anderson-type random Schrödinger operators is a measurable locally integrable function rather than a signed measure or a distribution. This generalize our recent results on the existence of the integrated density of surface states in the continuous case and those of A. Chahrour in the discrete case. The proof uses ...

Magnetic abrasive finishing can be classified as a non-traditional super finishing method for finishing surfaces with different shapes and working materials like flat plates, shafts, bearings parts, screws, tubes and many other mechanical parts that need good surface finishing properties. MAF is effective in polishing, cleaning, deburring and burnishing metal parts. The most important parameter...

in this article, finite difference method (fdm) is used to study the size-dependent free vibration characteristics of rectangular nanoplates considering the surface stress effects. to include the surface effects in the equations, gurtin-murdoch continuum elasticity approach has been employed. the effects of surface properties including the surface elasticity, surface residual stress and surface...

In the current work, the effect of surface morphology on light emission property and absorption behavior of quasi-columnar macro-porous silicon (PS) was investigated. PS structures with different morphology were synthesized using photo-electrochemical etching method by applying different etching current densities. SEM micrographs showed that empty macro-pores size and porosity of PS layers were...

What do investigators like to know about the surfaces of their biomaterials? Historically, the focus has shifted from studies of proteins adsorbed on surfaces to assays of surface ligands for cell attachment. Currently, a large number of investigators are interested to find methods for persuading cells to modify their phenotype in order to achieve a useful end result. Typical areas of interest ...