presence of heavy metals in the aquatic systems has become a serious problem. as a result, therehas been a great deal of attention given to new technologies for removal of heavy metal ions from contaminated waters. adsorption is one of the effective methods for removal of toxic heavy metal such as chromium (vi). in the present study, adsorbent is prepared from rice husk, a low cost by product f...

presence of heavy metals in the aquatic systems has become a serious problem. as a result, therehas been a great deal of attention given to new technologies for removal of heavy metal ions from contaminated waters. adsorption is one of the effective methods for removal of toxic heavy metal such as chromium (vi). in the present study, adsorbent is prepared from rice husk, a low cost by product f...

In this note some stability results are derived for the Douglas splitting method. The relevance of the theoretical results is tested for an advection-reaction equation. 1. Presentation of the results Consider the initial value problem for a system of ODEs u′(t) = F (t, u(t)) (1.1) with 0 ≤ t ≤ T and given initial value u(0). We shall consider numerical schemes with step size τ yielding approxim...

Background; The aim of this study is to compare UV, ferrate (VI) and UV/ferrate (VI) methods for removal of hydrogen sulfide and chemical oxygen demand (COD) from municipal wastewater under a continuous condition. Methods; The experiment was divided into three parts: 1) pollutants removal by using ferrate (VI) alone; 2) pollutants removal using UV alone; 3) pollutants removal using a combina...

he purpose of this work is to introduce and study the concept of minimal deterministic automaton with IF-outputs which realizes the given IF-language. Among two methods for construction of such automaton presented here, one is based on Myhill-Nerode's theory while the other is based on derivatives of the given IF-language. Meanwhile, the categories of deterministic automata with IF-outputs and ...

We consider a new model for buffer management of network switches with Quality of Service (QoS) requirements. A stream of packets, each attributed with a value representing its Class of Service (CoS), arrives over time at a network switch and demands a further transmission. The switch is equipped with multiple queues of limited capacities, where each queue stores packets of one value only. The ...

Myosin VI contains an inserted sequence that is unique among myosin superfamily members and has been suggested to be a determinant of the reverse directionality and unusual motility of the motor. It is thought that each head of a two-headed myosin VI molecule binds one calmodulin (CaM) by means of a single "IQ motif". Using truncations of the myosin VI protein and electrospray ionization(ESI)-M...

where each F = (Fi)i∈Λ is an unknown function representing the mass density of gas particles; Λ is a finite set {1, 2, . . .m} and Λ± := {i ∈ Λ : vi ≷ 0}; each νi is a positive integer; each vi is a constant representing the x-component of the i-th velocity and vi’s are not necessarily distinct and not necessarily non-zero; each Qi(F ) is a given function called the collision term; each Bij is ...

One calls attention to the fact that the stochastic dynamic systems are not random completely. They have both random and regular components of their evolution. Determinitic dynamic system is considered to be a special case of dynamic system with vanishing stochastic component of evolution. Mathematical technique for description of regular evolution component of dynamic systems (stochastic and d...