introduction coastal sand dunes are  important morphological forms in caspian coastal regions. these dunes are formed and developed under the influence of sediment influx, climate, impact of wind, waves, currents. these are parallel to the coastal characterisitics with enough space for expansion. the whole collection of these parameters are available in many coastal areas of the caspian sea , b...

sand and dust storms are natural events that occur widely around the world, mostly in dry and bare lands. over thepast decade a large part of iran has been affected by this phenomenon, and tehran has not been excluded from thisevent. therefore, having knowledge of spatiotemporal frequency variations can aid us in future management andstorm trajectory assessment. in this study the synoptic anemo...

The hydrodynamic and constituent transport model UnTRIM was used to simulate hydrodynamics in Upper Klamath Lake, a shallow, hypereutrophic lake in which currents are responsive primarily to wind forcing. A simplified version of a dissolved oxygen model was used to simulate the transport of oxygen-depleted water from a deep trench on the western shoreline into important fish habitat in the nort...

stem cells are self-renewing and undifferentiated cell types that can be differentiate into functional cells. stem cells can be classified into two main types based on their source of origin: embryonic and adult stem cells. stem cells also classified based on the range of differentiation potentials into totipotent, pluripotent, multipotent, and unipotent. multipotent stem cells have the ability...

Geomorphic mapping of Egypt’s Western Desert from LANDSAT-MSS images reveals oriented aeolian landforms that record, in part, Holocene winds. Wind directions reconstructed from these landforms indicate the dominance of N–S airflow from 30jN to 20jN, turning clockwise southward to NE–SW, conformable with modern circulation. A second direction appears over western Egypt, W between 30jN and 26jN, ...

the purpose of this study is to investigate the impact of bureaucratic structure on the employee engagement (ee). our study extends previous researches by considering bureaucracy from two points of view: enabling versus hindering. we study the extent to which these two types of bureaucracy are related to the two forms of employee engagement: organizational (oe) and work engagement (we). the vie...

---