نتایج جستجو برای: spatial and temporal changes

تعداد نتایج: 16975576  

Water changes information in the hydrological system, in time and space, as an environmental issue takes heed of managers and decision makers in watershed management and river engineering, which can be addressed by using spatially distributed modeling. In this study simulation of water balance components in Taleghan mountainous watershed is performed using the spatially distributed hydrological...

Journal: :مدیریت آب و آبیاری 0
سید پویان پیرنیا کارشناس ارشد مهندسی ساز ههای آبی، گروه ساز ههای آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران جمال محمد ولی سامانی استاد گروه مهندسی سازه های آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران جواد منعم استادیار گروه مهندسی ساز ههای آبی، دانشکدة کشاورزی، دانشگاه تربیت مدرس، تهران - ایران

the determination of temporal and spatial salinity in tidal rivers is significant in supplying water for agriculture purposes, particularly where there is no controller dam at the downstream. in this research, the coherens model was applied to study the hydraulics of water flow, salinity distribution and transmission at the bahmanshir river. coherens is a 3d multi-purpose hydrodynamic model whi...

ژورنال: سلامت و محیط زیست 2017

Background and Objective: In the recent decade, critical condition of particulate matters (PMs) concentration is considered as one of the most important issues in Tehran megacity. Due to sparse spatial distribution of air quality monitoring stations and economic considerations, researchers proposed remote sensing technique as a fast and economical way to obtain complete spatial and temporal cov...

Journal: :iranian rehabilitation journal 0
mahmood bahramizadeh department of orthotics and prosthetics, university of social welfare and rehabilitation sciences, tehran, iran. mokhtar arazpour department of orthotics and prosthetics, university of social welfare and rehabilitation sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) stephen william hutchins ihscr, faculty of health & social care, university of salford, greater manchester, uk.سازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences)

objectives: this study was designed to evaluate the effectiveness of a modified floor reaction ankle foot orthosis (frafo) design on gait performance in children with cerebral palsy. methods: eight children with cerebral palsy wore a modified frafo bilaterally for six weeks. motion analysis was used to assess the immediate effectiveness of the orthosis on improving gait and also following six w...

Journal: :iranian journal of radiation research 0
a. mirzajani medical physics group, tehran university of medical sciences, tehran, iran n. riyahi-alam medical physics group, tehran university of medical sciences, tehran, iran m.a. oghabian medical physics group, tehran university of medical sciences, tehran, iran k. firuznia radiology group, tehran university of medical sciences, tehran, iran h. saberi neurosurgery group, tehran university of medical sciences, tehran

abstract  background: the brain response to temporal frequencies (tf) has been already reported, but with no study reported for different tf with respect to various spatial frequencies (sf).  materials and methods: fmri was performed by 1.5t ge-system in 14 volunteers during checkerboard, with tfs of 4, 6, 8 and 10hz in low and high sfs of 0.5 and 8cpd.  results: average percentage bold signal ...

Journal: :Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 2011

Journal: :Journal of Soil Sciences and Agricultural Engineering 2013

Journal: :Atmospheric Environment 2023

Concentration data on POPs in air is necessary to assess the effectiveness of international regulations aiming reduce emissions persistent organic pollutants (POPs) into environment. European background are continuously monitored using active- and passive sampling techniques at a limited number atmospheric monitoring stations. As result low spatial resolution such continuous monitoring, there u...

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