After a review of some properties of dual quaternions, De Moivre's and Euler's formulas for the matrices associated with these quaternions are studied. In special case, De Moivre's formula implies that there are uncountably many matrices of unit dual quaternions…

The male genitalia of Lixus nordmanni Hochhuth, 1847 (Curculionidae: Coleoptera) were examined by optical and scanning electron microscope (SEM). A detailed description is provided. In Lixus nordmanni, the male genitalia is annulate type, and it consists of aedeagus and 9th sternite (spiculum…

The purpose of this study is to present a new collocation method for the solution of second-order, linear partial differential equations (PDEs) under the most general conditions. The method has improved from Chebyshev matrixmethod, which has been given for solving…

In this study, a new collocation method based on Bernstein polynomials defined on the interval [a, b] is introducedfor approximate solutions of initial and boundary value problems involving higher order linear differential equations with variable coefficients. Error analysis of the…

In this study, the change point in mean of the sequence of the random variables from normal distribution under the case of having an outlier in the sequence is considered. Under with this case, the maximum likelihood estimate of the change point…

Providing accurate predictions efficiently is vital for the success of recommender systems. There are various factors that might affect the quality of the predictions and online performance. Similarity metric used to determine neighbors is one of such factors. Therefore, given…

Wireless networks are susceptible to security attacks due to their open transmission media. Therefore, wireless network security is somewhat more complex than that of wired network security. In wireless network security, authentication is the most essential procedure to ensure that…

In this work, removal of Cu2+cations by adsorption-flocculation method was studied. In contrary of conventional adsorption processes, the method proposed supplies the removal of Cu2+ loaded adsorbent through the precipitation and thus the filtration step is skipped out. The precipitation…

The main objective of this study is to produced WC-Co-Ni ceramic-metal composites Electroless Ni coated WC-Co powders were used in powder metallurgy techniques for making samples. 2 μm - 10μm micron grain size of WC powders and 10μm grain sized…

In this work, a polymer of polyurethane (PU) was electrospun for 1 hour to create a scaffold under different conditions. A 3x3 general full factorial in a completely randomised design using three levels of two factors: power (W= 20, 22…