An experimental study comparing different user interfaces for a virtual drum is reported. Virtual here means that the drum is not a physical object. 16 subjects played the drum on five different interfaces and two metronome patterns trying to match their hits to the metronome clicks. Temporal accuracy of the playing was evaluated. The subjects also rated the interfaces subjectively. The results...

A scheme is presented for mapping the connectivity of a potential magnetic field arising from an arbitrary distribution of discrete sources. The field lines interconnecting the sources are classified into Nd domains, defining the field’s connectivity. The number of domains is shown to depend on the number of sources and on the numbers of nulls and separators according to a simple relation. A cl...

Magnetic separation devices are widely used to separate tramp of iron from a specific feed materials. Many industries rely on those devises and the variety technological solution depend mainly characteristic be separated. In this paper, main characteristics low intensity magnetic based permanent magnets for dry considered evaluate force index computation.

cumin is an annual plant suitable for dry and semi-dry regions. it is harvested at two stages to prevent seed shedding. first, the cumin bushes are harvested by hand or using a scythe. after drying, the cumin bushes are beaten with a stick or trampled using animals or a small tractor. this harvesting method is time consuming, requires intensive labor and is an incomplete threshing process resul...