The objective of this research is to develop a mathematical procedure construct Hijri calendar that consistent with the Gregorian calendar. Our hypothesis was derived from Quran Chapter, Alkahf verse (25), which states “They remained in their cave for three hundred years, adding nine”. We understand mean “every 300 solar years equivalent exactly 309 lunar years”. starting point locate number da...

the local solid flow structure of gas-solid bubbling fluidized bed was investigated to identify and characterize the particle clusters. extensive mathematical calculations were carried out using the energy-minimization multi-scale (emms) approach for evaluating cluster properties including the velocity, the size and the void fraction of clusters in the dense phase of the bed. the results showed...

Each new theory shares the same way in science. Its appearance is based on new experimental data and theoretical researches. They thought that experimental data are more valuable than theoretical research because any data can be proven by actual measurement and mathematical calculations. They believe also that agreement between physical measurement and mathematical calculations shows total proo...

Symbolic Computation is a Computer Algebra System (CAS) which is developed to compute the symbolic mathematical expressions consisting simple or complex calculations. Symbolic Computation provides the interface to provide input expression in a typical mathematical format. Mathematical problems related to algebra, logarithm, roots, sum & product of series etc can be solved using this package. Us...

In this Review we show several mathematical techniques that can be used in molecular calculations using Slater orbitals, like the transformation of the Hamiltonian, derivatives of spherical harmonics with respect to the angles, and angular transformations. We treat several kinds of integrals in detail: the exchange, Coulomb and hybrid repulsion and exchange correlated integrals, and the three-c...

Several studies have used cognitive processes to study cerebral functions. Recently, much interest has been shown in the effects of cognitive processing on brain activity using functional magnetic resonance imaging (fMRI) or functional near-infrared spectroscopy (fNIRS). Some studies have reported that cognitive processing can increase cortical activation during tasks [1,2]. Various types of co...

OBJECTIVE This study was performed in order to determine if mathematical modeling of the canine teeth in dogs could be utilized to provide an accurate and reliable estimation of crown surface area that could be used in both a research and a clinical setting. MATERIALS AND METHODS Actual surface area (aSA) calculations for 32 stone dies of clinical crown preparations were acquired utilizing a ...