Early stages modelling of processes involves issues classification variables into inputs, outputs and internal variables, referred to as Model Orientation Problem (MOP) which may be addressed on state space implicit, or matrix pencil descriptions. Defining orientation is equivalent producing models the regular singular type. In this paper we consider autonomous differential descriptions defined...

Here we report an electrochemical sensor for the determination of picric acid (PA) based on molecularly imprinted polymer (MIP) reduced graphene oxide (rGO) coated pencil graphite electrode (PGE). Pyrrole (Py) was electropolymerized surface rGO modified PGE, where PA used as template. After extraction molecules from matrix, MIP|rGO|PGE obtained. Computational studies were carried out to predict...

This paper is devoted to the study of perturbations a matrix pencil, structured or unstructured, such that perturbed pencil will reproduce given deflating pair while maintaining invariance complementary pair. If latter unknown, it referred as no spillover updating. The specific structures considered in this include symmetric, Hermitian, ?-even, ?-odd and ?-skew-Hamiltonian/Hamiltonian pencils. ...

Reports of graphite pencil lead injuries to the eye are rare. Although graphite is considered to remain inert in the eye, it has been known to cause severe inflammation and damage to ocular structures. We report a case of a 12-year-old girl with intracorneal graphite foreign bodies following a graphite pencil injury.

PURPOSE To verify the clinical pencil beam dose calculation algorithm for passive scattering proton therapy using field with large range in tissue, i.e. in prostate cancer, using a Monte Carlo (MC) simulation system. METHODS Previously treated prostate cancer cases were randomly selected from our patient database. All patients received the same dose prescription of 50Gy (25 fractions) to plan...

In this study, we introduce a new type of surface curves called $D$-type curve. This curve is defined by the property that the unit Darboux vector $vec{W}_{0} $ of a surface curve $vec{r}(s)$ and unit surface normal $vec{n} $ along the curve $vec{r}(s)$ satisfy the condition $leftlangle vec{n} ,vec{W}_{0} rightrangle =text{constant}$. We point out that a $D$-type curve is a geodesic curve or an...

In this paper, five different solvent-borne industrial topcoats were dried with infrared (IR) radiation and under atmospheric conditions. A comparison of physical, mechanical, chemical, electrochemical properties differently was made. The results differential scanning calorimetry (DSC), Fourier-Transform Infrared Spectroscopy (FTIR), adhesion a topcoat to the metal substrate (determined by pull...