concepts in general, and the concepts of natural number and geometry in particular, present a longstanding puzzle to the brain and cognitive sciences. Nevertheless, a rich array of studies in cognitive development, animal cognition, cognitive psychology, comparative cultural psychology, and cognitive neuroscience is providing clues that may lead to its solution. Four cognitive systems found in ...

seismic waves are filtered as they pass through soil layers, from bedrock to surface. frequencies and amplitudes of the response wave are affected due to this filtration effect and this will result in different ground motion characteristics. therefore, it is important to consider the impact of the soil properties on the evaluation of earthquake ground motions for the design of structures. soil ...

We introduce new methods for defining generalized sums of monotone operators and generalized compositions of monotone operators with linear maps. Under asymptotic conditions we show these operations coincide with the usual ones. When the monotone operators are subdifferentials of convex functions, a similar conclusion holds. We compare these generalized operations with previous constructions by...

background:   iran places sixth amongst high risk natural disaster countries and guilan province of iran shoulders a large amount of socio-economic burden due to snow catastrophes. the more knowledge of circumstances we have, the more efficient our future encounters will be. methods: in this retrospective study, of all of the patients admitted to poursina hospital due to snow and ice related tr...