Homotopy perturbation method is a well-known method for solving many functional equations such as differential equations, integral equations, integro-differential equations and so on. Applying this method needs some computations which are boring by hand. Therefore, creating a program to do all computations would be useful. In this work, a maple program is prepared to solve the second kind of Vo...

Second language (L2) researchers have long recognized the potential benefits of incorporating pronunciation instruction in language curricula (e.g., Arteaga, 2000; Castino, 1996; Elliott, 1995, 1997; González-Bueno, 1997; Lord, 2005; Major, 1998; Moyer, 1999; Terrell, 1989; among others), and have investigated a variety of training types both in and out of the classroom, meeting with mixed succ...

In this paper, we present the results of mercury concentration in soils, buds and leaves of maple (Acer platanoides-Ap) and linden (Tilia platyphyllos-Tp) collected in four periods of the growing season of trees, i.e. in April (IV), June (VI), August (VIII) and November (IX) in 2013, from the area of Poznań city (Poland). The highest average concentration of mercury for 88 samples was determine...