Simultaneous Analysis of Noise and Vibration of Machines in Vibroacoustic Diagnostics

The article is a continuation of the authors’ elaboration (Dąbrowski, Dziurdź, 2016). The aim of this continuation is to prove that a proposed way of modelling and using the coherent analysis to filter nonlinear disturbances is a useful technique in vibroacoustic diagnostics. The thesis was proved by solving the task of diagnosing the damage of the gear of the car gearbox on the basis of the measurement of mechanical vibrations and the noise in the engine chamber

To the Slimmer Go the Spoils: Heterogeneous Responses to Bodyweight Incentives in Olympic Weightlifting Tournaments

When competitive weightlifters tie — a fairly frequent occurrence at the international level — the higher final rank is awarded to the lifter with the lower official bodyweight. Since winning a tiebreaker is more beneficial at higher ordinal ranks, tournament theory suggests a negative relationship between ability and bodyweight. Analysis from 58 Olympic tournaments shows evidence of a significantly negative relationship between ability and bodyweight except in heavier weight-classes. Cross-class differences in bodyweight reduction among high-ability lifters appear to be primarily attributable to cross-class differences in the expected benefits of bodyweight reduction. Eastern Economic Journal (2008) 34, 375–389. doi:10.1057/palgrave.eej.9050039