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...

A series of pyroclastic density currents were generated at Tungurahua volcano (Ecuador) during a period of heightened activity in August 2006. Dense pyroclastic flows were confined to valleys of the drainage network, while dilute pyroclastic density currents overflowed on interfluves where they deposited isolated bodies comprising dune bedforms of cross-stratified ash exposed on the surface. He...

In this randomized controlled trial (RCT), 43 participants having 25(OH) D level less than 78 nmol/L received daily or stoss vitamin D therapy with follow-up at 4–6 months and 9–12 months. Of these, 34 (79%) had insufficient (50–78 nmol/L) levels, 8 (19%) had mildly deficient (27.5–50 nmol/L) levels and 1 (2%) had deficient (<27.5 nmol/L) vitamin D level. Daily vitamin D therapy had a higher av...

Aeolian process leads to the transportation and accumulation of sand particles that result in dune landforms. The structure shape dunes are driven by parameters interacting wind force material composition within. Cross-section profiles over will essay geomorphological through which steady state rate transport can be computed. National Aeronautics Space Administration’s novel satellite namely Ic...

OBJECTIVE Stoss vitamin D treatment has been recommended for its non-skeletal benefits in adults, but there is a lack of data on the optimal dose of vitamin D stoss therapy in children with vitamin D deficiency/insufficiency without rickets. This study aimed to compare efficiency/side effects of two different stoss therapy regimens (10 000 IU/kg and 300 000 IU vitamin D3) administered in childr...

kashan erg is one of the most important sand dunes complexes in iran. it is included the most important various type of sand dunes in iran. this study was performed to compare the granulometry of aeolian sediments in different sand dunes and also from plinth to crest of transverse dunes that located in kashan erg’s north. in order to determining different statistical variables, aeolian sediment...

We read with interest the recent review article on Vitamin D deficiency and treatment in childhood [1]. Intermittent dosing with Stoss regimens is effective in the treatment and prevention of vitamin D deficiency, is much more economical than daily dosing, and ensures supervised administration and compliance. However, stoss does not necessarily mean large. Stoss (German for “bump up”) effect ca...