DOC degradation (Figure 1) showed a

decay coefficient ([k.sub.T]) of 0.62 [day.sup.-1], with half-life (t 1/2) of 1.12 days (Table 1).

Figure 2: ACO Metaheuristics Pseudocode Set parameters, initialize pheromone trails while termination condition not met do Construct Ant Solutions Apply Local Search (optional) Update Pheromones End while The pheromone trail

decay coefficient ([rho]) and pheromone amount ([phi]) have an important impact on the performance of ACO (Mehdi, Nasser, Mohammad, 2009).

--[emDecayCoeff.sub.i] [member of] [0, 1] is the

decay coefficient of i's emotion intensity (see Section 2.2).

[13] with that of WHYSWESS-WQ, WHYSWESS-WQ had a smaller longitudinal dispersion coefficient and

decay coefficient of N[H.sub.3]-N and had a larger

decay coefficient of TP, [COD.sub.Mn], and F (Table 3).

And the decrease in bacterial activity in activated sludge can result from cell death and activity decay [8] and significantly affects the preservation of bacterial species and the

decay coefficient [9, 10].

The major factors in predicting the service life of concrete structures exposed to chloride environment are chloride content at the surface of the concrete, critical chloride content for corrosion of reinforcing steel, the diffusion coefficient, and diffusion

decay coefficient of chloride ions.

The bio kinetic coefficients considered for design of the bioreactor, and range of values comprise; maximum specific growth rate ([[micro].sub.max]), maximum rate of substrate utilization, per mass of microorganisms (K: 2-8 [d.sup.-1]), substrate concentration at half the maximum growth rate, otherwise known as half velocity constant (Ks: 20-80 mg sCOD/L), maximum yield coefficient, mass of cell formed per mass of substrate consumed (Y: 0.2-0.5 mg VSS/ mg COD), and endogenous

decay coefficient, per day ([K.sub.d]: 0.03-0.07 d-1) [15].

where [Q.sub.c] is the wave

decay coefficient, H is the incoming wave height, [H.sub.o] is the local wave height.

D is the diffusivity coefficient of each radioactive particle in seawater, [v.sub.x] and [v.sub.y] are the velocities of the Kuroshio current in the x-and y-directions, respectively, and [lambda]is the

decay coefficient. We assume that there is no advection in the z-direction.

[k.sub.T] = global

decay coefficient of [POC.sub.LS] ([k.sub.1] + [k.sub.2]) ([day.sup.-1]);

An alternative method is to use natural log transformation of the [CO.sub.2] concentration data thereby linearizing the exponential decay curves for each room and then perform linear regression to identify the

decay coefficient (which is the slope of the transformed decay line) for each room.

[k.sub.d] = endogenous

decay coefficient, [t.sup.-1]