Although Gardner and his associates’ work was most influential in the field of L2 motivation, from the early 1990s onwards, their work has been criticized for several reasons. Some researchers claimed that integrative and instrumental orientations were no longer able to convey the complexity of the L2 motivation construct. To examine this complexity, the present study attempted to investigate t...

The present work is the successful extension of an improved equation of state (EOS) to refrigerant fluids. The objective is the prediction of isothermal and saturated liquid densities of refrigerants. Two temperature-independent parameters appearing in the modified EOS are closely related to critical point properties of refrigerant fluids. Our results showed that, the proposed EOS can predict w...

alkanolamine solutions such as 2-amino-2-methyl-1-propanol (amp) are widely used in chemical industries for the removal of acid gases such as co2 and h2s. in this work, the density of co2, amp, water, and amp solutions using the goharshadi–morsali–abbaspour equation of state “gma eos” in the extended 50-degree range of temperatures (313.06-362.65 k) and pressures (0.5-40 mpa) was calculated. th...

prediction of available vapor pressure data in the case of compounds containing c-h-o led to derivations and recommendations of standard equations for this property. the accuracy of vapor pressure estimations is essential to use as a basis to calculate acentric factor, thermal and equilibrium properties. in this study, according to the previous work, an accurate equation to estimate vapor press...

in this work, we conduct a comparative study among the combine laplace transform and modi ed adomian decomposition method (lmadm) and two traditional methods for an analytic and approximate treatment of special type of nonlinear volterra integro-differential equations of the second kind. the nonlinear part of integro-differential is approximated by adomian polynomials, and the equation is red...

in this work, the adsorption of carbon dioxide from model flue gas on different adsorbents has been investigated. using simplified modeling, parameters such as the total mass transfer coefficient and the effective diffusivity have been determined. experiments were carried out in two sections: firstly, adsorption of pure carbon dioxide on different adsorbents was measured at pressures ranging fr...

OBJECTIVE The objective of the study was evaluation of work conditions in a pasta manufacturing plant, including: physical and psychological load and factors of material work environment. The main aim was determination of the level of employees' exposure to our dust. METHODS Studies of work conditions were conducted in a our processing plant in the Lublin region at the workplace of an automat...