This paper presents a thorough analysis of direct microwave heating as sintering process ceramic materials. It questions why susceptor-assisted is used in most experimental works, although coupling preferable for taking advantage the possible beneficial effects field on phenomena. issue was investigated by conducting both experiments and numerical simulations. The consisted alumina yttria doped...

In this commentary, we react to the recent study by Helsen, Gilis and Weston (2006) on judging offside in football. Helsen et al. claim that their data falsify the optical error hypothesis presented by Oudejans et al. (2000). However, as we will elucidate here, they misinterpret this hypothesis and present a data set that is seriously flawed, and hence not suited to test it. Therefore, their co...