This vignette presents eRah, an R package with an integrated design that allows for an innovative deconvolution of GC–MS chromatograms using multivariate techniques based on blind source separation (BSS), alignment of spectra across samples, and automatic identification of metabolites by spectral library matching. eRah outputs a table with compound names, matching scores and the area of the com...

Blind source separation technique separates mixed signals blindly without any information on the mixing system. In this paper, we have used two evolutionary algorithms, namely, genetic algorithm and particle swarm optimization for blind source separation. In these techniques a novel fitness function that is based on the mutual information and high order statistics is proposed. In order to evalu...

The blind signal separation (BSS) problem has a distinctive feature: the unknown parameter being an invertible matrix, the parameter set is a multiplicative group and the observations can be modeled by a transformation model. For this reason, it is possible to design on-line algorithms which are very simple and still offer excellent performance (typically: Newton-like performance at a gradient-...

pistachio nut (pistacia vera l.) is one of the most delicious and nutritious nuts in the world. in order to increase the added value of the pistachio nuts, it is necessary to develop new products to meet consumer needs. this is the first paper on pistachio halva. the product was developed using pistachio paste (as main ingredient), mixture of sugar-glucose, egg white and citric acid. the effect...

The present thesis focuses on the visualization of vector fields with an emphasis on flow fields. In connection with a DFG project, close collaboration and discussions with fluid dynamicists raised new questions concerning the detection and depiction of special features in flows. The contributions of the thesis in this context are the following: First, we present and apply a method to extract t...

The current study presents synthesis and characterization of high impact polystyrene - TiO2 nanoparticles mixed matrix membranes for separation of carbon dioxide from nitrogen. The solution-casting method was used for preparation of membranes. The nano mixed matrix membranes were characterized using scanning electron microscopy to ensure the suitable dispersion of nano particles in high impact ...

in this study, different methods of separating of the microalgae from the culture medium as one of the most important and expensive steps in achieving commercial production of biodiesel from microalgae was investigated. electro coagulation-flotation (ecf) was preferred among these methods due to its process simplicity and capability to scale up. the effect of three parameters, i.e., initial ph,...

among the all parameters affecting the performance of a downhole de-oiling hydrocyclone, the investigation of internal flow field deserves more attempts especially in the petroleum industry. in this study, the effects of inlet flow rate, inlet oil volume fraction, and oil droplet diameter on the separation efficiency and pressure drop ratio have been investigated along the hydrocyclone body. al...