We characterize absorption in finite idempotent algebras by means of Jónsson absorption and cube term blockers. As an application we show that it is decidable whether a given subset is an absorbing subuniverse of an algebra given by the tables of its basic operations.

A recent area of interest is the development and study eigenvalue problems arising in scattering theory that may provide potential target signatures for use nondestructive testing materials. We consider a generalization electromagnetic Stekloff problem depends upon smoothing parameter, which we establish two main results were previously unavailable this type problem...

The suppression of unnecessary radio-electronic noise and the protection electronic devices from electromagnetic interference by use pliable highly microwave radiation absorbing composite materials based on polymers or rubbers filled with conductive magnetic fillers have been proposed. Since working frequency bands systems are rapidly expanding up to millimeter wave range, capabilities shieldin...

Abstract The Sound absorbent textile materials, especially nonwoven composite structure of reclaimed materials which have low manufacturing costs, relative density and are more attractive. In this research the use cotton polyester fiber for production sound absorption has been investigated. Three different blend ratios fibers that is 25:75, 40:60 50:50 used. composites specified their physical ...