let r be a commutative noetherian ring. we study the behavior of injectiveand at dimension of r-modules under the functors homr(-,-) and -×r-.

introduction nowadays, many studies were performed about noise source and its type and effects related to duration of sound emission. most of these researches just report sound pressure level in frequency or time domain. these researches should be continued in order to find better absorber material in noise pollution. use of fractal geometry is a new method in this filed. wave fractal dimension...

In order to ensure an efficient and accurate operation of the track reconstruction in HADES, we have investigated sources of intrinsic misalignment have developed new approaches for the alignment of HADES tracking detectors. The effects from time calibration and geometry are distinguished using the drift time deviation variable t (calculated time – measured time) and selecting the tracks passed...