Not only are personal trainers the face of the personal fitness industry, they also generate a significant portion of revenue in this multi-billion dollar business. It is therefore essential to produce the best possible personnel. In order to assist the industry in selecting the best trainers, we developed a preliminary personal trainer evaluation system based on a survey of experts. The analytic hierarchy process (AHP) method was then applied to the system. Of the three major dimensions -achievement, teaching, and service results -achievement results, which include course sales and team achievement, were identified as the most important.

Copper electroplating formulas composed of CuSO 4 , H 2 SO 4 , chloride ions, polyethylene glycol (PEG), bis (3-sulfopropyl) disulfide (SPS), and different levelers for microvia filling of a printed circuit board (PCB) were studied. The influence of the copper electroplating parameters, accelerator and leveler concentrations and cathodic current density on the microvia filling performance was explored using the Taguchi experimental design method. An L9 orthogonal array with four controlling factors at three levels was employed in the experimental design method. Variance analyses of the mean filling performance and the signal-to-noise ratio of the controlling factors showed that the most significant factor for the microvia filling performance was the leveler concentration. The other factors exhibited little to no effect on the microvia filling performance. The contribution of levelers to the filling performance was characterized using galvanostatic measurement and linear sweep voltammetry (LSV) with a working electrode at different rotational speeds. The experimental results indicated that the inhibiting effect of the levelers on the copper deposition was related to forced convection, which is a key physicochemical interaction for exhibiting good filling performance.