نتایج جستجو برای: Khartouran Erg

تعداد نتایج: 7133  

Journal: Desert 2008
N. Mashhadi S. Feiznia

The result of wind dynamic (capacity and potential) is transport of soil or sediment particles and subsequent formative desert landforms based on the severity of erosion or sedimentation. The Khartouran region, because of its geology, geomorphology and climatology conditions is a special place in the arid region on the closed basin of Dasht-e-kavir. It is evident that the ecosystem balance of t...

Journal: :desert 2008
n. mashhadi s. feiznia

the result of wind dynamic (capacity and potential) is transport of soil or sediment particles and subsequent formative desert landforms based on the severity of erosion or sedimentation. the khartouran region, because of its geology, geomorphology and climatology conditions is a special place in the arid region on the closed basin of dasht-e-kavir. it is evident that the ecosystem balance of t...

Journal: Desert 2009
M. Ekhtesasi N. Mashhadi

Wind, in the duration of its erosional process, affects considerable changes in a grain's morphologyfrom its removal (detachment) step to sedimentation. In other word, a grain undergoes its gradualevolution during the transit process. In this project, the maturation of Aeolian sand grains had beenstudied upon as based on texture maturity indicator which includes: sorting, mean size grain, round...

ابدالی, سمیرا, جعفر زاده پور, ابراهیم, هاشمی, بیژن,

Background and purpose: Retinitis Pigmentosa (RP) is one of the retinal degeneration diseases affecting the eye signals. Electroretinogram (ERG) is a signal that plays an important role in diagnosis and treatment of RP. This signal includes useful information that cannot be revealed just in time domain. We aimed to investigate the effect of RP on time, frequency, and time-frequency parameters o...

Journal: Desert 2007
G. Feghhi H. Ahmadi M. Ekhtesasi N. Mashhadi, S. Feiznia

Wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. Regarding the importance of wind effects on sand dunes especially in Iran, in this study, Khartooran Erg was analyzed to determine wind direction and to detect sand source sites. Khartooran Erg is located on eastern north of Iran and lies in Khorasan Razavi and Semnan...

توکلی فرد, اصغر, قاسمیه, هدی, مشهدی, ناصر, نظری سامانی, علی اکبر,

  Kashan Erg is one of the most important sand dunes complexes in Iran. Due to erosive winds, always, Erg's marginal areas are faced to the transition of moving sands. So, in this research, the sand dune activity was investigated by Lancaster index. In this line, Erg's morphology map was prepared using aerial photographic, Google earth software and field observations. Then, maps of iso...

Journal: :nephro-urology monthly 0
mohamadreza nowroozi uro-oncology research center (uorc), tehran university of medical sciences, tehran, iran mohsen ayati uro-oncology research center (uorc), tehran university of medical sciences, tehran, iran erfan amini uro-oncology research center (uorc), tehran university of medical sciences, tehran, iran reza mahdian biotechnology research center, molecular medicine department, pasteur institue of iran, tehran, iran behzad yousefi uro-oncology research center (uorc), tehran university of medical sciences, tehran, iran amir arbab uro-oncology research center (uorc), tehran university of medical sciences, tehran, iran

results a total number of 43 specimens were studied, from which 9 were obtained from patients with metastatic prostate cancer. the expression of five examined genes had no correlation with psa level and gleason score. the expression of amacr decreased in metastatic prostate cancer (p = 0.02). the expression of other genes showed no difference between metastatic and non-metastatic tumors (p > 0....

Background: Central retinal vein occlusion (CRVO) is the second most common retinal vascular disorder after diabetic retinopathy. In this study, we tried to examine the potentials of time-frequency methods for differentiating the eyes with CRVO. Materials and methods: Twenty patients with unilateral CRVO were included in this study. Their contralateral normal eyes were considered as the control...

Journal: :جغرافیا و مخاطرات محیطی 0
مهران مقصودی سعید نگهبان سجاد باقری

introduction dominant process in arid and semi-arid region is dynamic of wind that carries the sand and caused damage to several facilities and human settlements. there are many human settlements with low population and mostly small and scattered in different parts of foothills of dasht-e lut (lut desert), especially in mountainous margins of alluvial fans. residential and cultivation area of t...

Journal: :desert 2013
a. tavakkolifard h. ghasemieh a. a. nazari samani n. mashhadi

the kashan erg is one of the most important sand dune complexes in iran. being affected by wind erosion, theerg's borderlands face numerous problems as a result of sand movement. to evaluate the risk of sands moving intoresidential areas near the kashan erg, anemometry data from synoptic stations located in kashan, ardestan, meimeh,naeen, and qom were collected and analyzed to calculate the san...

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