The paper investigates the effectiveness of four projection methods of finite response function (FIR) to infinite response function (IIR) filters. This is done in the scope of a linear physiological model developed for functional Magnetic Resonance Imaging (fMRI). Of the four methods the Steiglitz-Mcbride algorithm provided the best fit. A new method is also proposed where a regularization term...

For the resulting equation of double-curved shells, which is formed by revolution an arbitrary in-plane meridian curve and cannot be represented analytically, there exists no analytical approach to problem setting solution. This paper presents digitalization in polar coordinate system, forms double number series. The series then can approximated interpolation function so that calculations perfo...

Beryllium  oxide  (BeO)  nanopowder  was  synthesized  using  sol-gel method  and  the  effects  of  changes of  chemical  reagents  were investigated.  Because  of  tissue  equivalence  and  other  outstanding thermoluminescence  (TL) properties of  the bulk material  in X and γ dosimetry, the applicability of this nanostructure in TL dosimetry was studied  following  irradiation to  the 137 C...

Objective: The stress response is a dynamic process that can be characterized by predictable biochemical and psychological changes. Biomarkers of the stress response are typically measured over time and require statistical methods that can model change over time. One flexible method of evaluating change over time is the latent growth curve model (LGCM). However, stress researchers seldom use th...

Several mathematical equations have been proposed to modeling nutrient-response curve for animal and human justified on the goodness of fit and/or on the biological mechanism. In this paper, a functional form of a generalized quantitative model based on Rayleigh distribution principle for description of nutrient-response phenomena is derived. The three parameters governing the curve a) has biol...

This paper describes how the response curve of a video camera can be determined with the aid of a sheet of paper and two desk lamps only. The calibration process is based on the superposition law of incoherent light and does not make use of any calibrated measurement instrument.

background: selective phosphodiesterase (pde3) inhibitors improve cardiac contractility and may use in congestive heart failure. however, their proarrhythmic potential is the most important side effect. methods: in this research, we evaluated the potential cardiotonic activity of six new synthesized selective pde3 inhibitors (6-hydroxy-4-methylquinolin-2(1h)-one derivatives) using the spontaneo...