The connection between weather extremes and Rossby wave packets (RWP) has been increasingly documented in recent years. RWP propagation characteristics can modulate the midlatitude weather, setting scene for temperature precipitation controlling geographical area affected. Several studies on extreme events (EPEs) Alpine reported, as main triggering factor, a meridionally elongated upper-level t...

in this paper, we introduce and study the notion of precompacttopological generalized groups and some new results are given.

the author studies the $bf r$$g$-module $a$ such that $bf r$ is an associative ring‎, ‎a group $g$ has infinite section $p$-rank (or infinite 0-rank)‎, ‎$c_{g}(a)=1$‎, ‎and for every‎ ‎proper subgroup $h$ of infinite section $p$-rank (or infinite 0-rank respectively) the quotient module $a/c_{a}(h)$ is‎ ‎a finite $bf r$-module‎. ‎it is proved that if the group $g$ under‎ ‎consideration is local...

Owing to their sessile nature, plants are easily affected by various extenal factors. Among those, drought and salinity considered as the most common stresses, which often pose a threat plant growth development. Major effects of interconnected drive similar series molecular changes in plants. These alterations response stress under regulation signaling pathways, including engangement evolutiona...