porous silicon samples were prepared by electrochemical etching method for different etching times. the structural properties of porous silicon (ps) samples were determined from the atomic force microscopy (afm) measurements. the surface mean root square roughness (σ rms) changes as function of porosity were studied, and the influence of etching time on porosity and roughness was studied too. u...

sepals and petals are byproducts from saffron production process that waste without any use in iran. these byproducts containing a lot of anthocyanin and natural antioxidants.the aim of this study is determine efficiency of extraction and measurement of antioxidant activity and anthocyanin pigments of pollen and anther of saffron flower ,using mixed solvent of ethanol and hydrochloridic acid 1....

background the purpose of this study was to determine appropriate intensity of activity with fatmax during incremental exercise in the active and sedentary male participants. material and methods in this study, 11 active male students(vo2max42.87±1.75ml.kg-1.min-1,bmi 21.40±1.01 kg.m2) and 9 sedentary male students(vo2max36.57±2.95ml.kg-1.min-1, bmi 24.28±1.83kg.m2) were selected as the active ...

In this paper, we propose a variational segmentation model to deal with intensity inhomogeneity and Poisson noise. An energy functional is first proposed, which uses a data-fidelity term deduced from Poisson distribution instead of the usual L2 norm as a measure of fidelity. Due to the new data-fidelity measure, this energy functional can fit the image intensity more accurately while it can dim...

A 'two-objective, one-area' method and related equations are suggested to measure absorbance of microscopic stained objects. In such work, the measuring field invariably includes an image of the object and some clear area surrounding the image. The total intensity in the two areas is measured photometrically, using two different objectives, and substituted in the equation for absorbance. The eq...

Let P1 be a Poisson process of intensity λ1 on the positive x-axis, P2 a Poisson process of intensity λ2 on the positive y-axis, and P a Poisson process of intensity λ1λ2 in the interior of IR +, where P1, P2 and P are independent. Then the extended Hammersley process Lλ1(·, t) with sources and sinks given by P1 and P2, respectively, is distributed as a Poisson point process with intensity λ1 f...

This research introduces the scale of innovation intensity (SIIN) based on meta-taxonomy that subsumes other, less comprehensive taxonomies. The SIIN is similar to seismic scale used to measure the intensity of earthquakes. The intensity of technological change is measured by an indicator, called Magnitude, based on the impact of technological innovations on the economic system. The theory is a...

In this paper, we propose a novel intensity-based similarity measure for medical image registration. Traditional intensity-based methods are sensitive to intensity distortions, contrast agent and noise. Although residual complexity can solve this problem in certain situations, relative modification of the parameter can generate dramatically different results. By introducing a specifically desig...