The results of detailed experimental and theoretical considerations relating to multiple hologram recording in lithium niobate is reported. The following problem areas are identified and discussed: 1) the angular selectivity of the stored holograms, 2) interference effects due to the crystal surfaces, 3) beam divergence effects, 4) material recording sensitivity, and 5) scattered light from mat...

introduction: the most common interpretation for the mechanisms of antidepression is the increase of the brain monoamine levels such as dopamine (da). the increase of da can reduce depression but it can also decrease the monoamine release because of autoreceptor inhibition. although bupropion can decrease the dopamine release, there is evidence about stimulatory effects of chronic application o...

Traditional techniques for monitoring wildlife populations are temporally and spatially limited. Alternatively, in order to quickly and accurately extract information about the current state of the environment, tools for processing and recognition of acoustic signals can be used. In the past, a number of research studies on automatic classification of species through their vocalizations have be...