The performance of complex polyrhythms-rhythms where the left and right hand move at different rates-is usually the province of highly trained individuals. However, studies in which hand movement is guided haptically show that even novices can perform polyrhythms with no or only brief training. In this study, we investigated whether novices are able to tap with one hand by matching different ra...

The understanding of the tribological system and corresponding wear behaviour metallic materials is, especially in wet condition presence abrasive particles, high importance. This particularly applies for construction applications, like core drilling sawing reinforced concrete, where knowledge about adhesive but also micro- macro-mechanisms is limited. If it comes to material removal between me...

The paper deals with the drive options of mechanical presses and their influence on energy efficiency. Although main focus is efficiency, we also emphasize design operational issues. press machine divided into two separate sections – side side. its efficiency described using an balance formula. We quantify for 80 MN forging press. describe eight different types drives from a typical flywheel to...

The loss of water from hardened concrete (stored in unsaturated air) causes drying shrinkage. Shrinkage of hardened concrete is influenced by various factors in a similar manner to creep under drying conditions. High cementitious materials content, particularly fine particles will reduce bleeding, but increase long term drying shrinkage. (The time of sawing the joints for induced cracking is no...

OBJECTIVES The aim of this study was to evaluate dermal exposure to the resin acids abietic acid, dehydroabietic acid and 7-oxodehydroabietic acid during collecting in sawmills and during sawing in carpentry workshops, respectively. METHODS Sampling was performed by fastening patches at 12 different areas on a sampling overall, one patch on the front of a cap, one patch on the chest inside th...

The effects of the Engineered Micro-Geometry (EMG) carbide teeth circular saws on their wear rate and resulting sawing variation for 2-time intervals were studied. objective was to improve resistance used during primary transformation wood. tests carried out under industrial production conditions with two series saws; 1- up-sharp tips, 2- cutting edges honed adopt a waterfall geometry. duration...