نتایج جستجو برای: topography factors

تعداد نتایج: 1103680  

Journal: :AJNR. American journal of neuroradiology 2015
S Shams J Martola T Granberg X Li M Shams S M Fereshtehnejad L Cavallin P Aspelin M Kristoffersen-Wiberg L O Wahlund

BACKGROUND AND PURPOSE Cerebral microbleeds are thought to represent cerebral amyloid angiopathy when in lobar regions of the brain and hypertensive arteriopathy when in deep and infratentorial locations. By studying cerebral microbleeds, their topography, and risk factors, we aimed to gain an insight into the vascular and amyloid pathology of dementia diagnoses and increase the understanding o...

2010

FARSITE is a computer based model of fire spread that utilized spatially resolved data to simulate fires occurring over areas of heterogeneous fuels, topography, and weather (Finney 1996). In as much as changes in fuel characteristics can be reflected both in nature and extent, FARSITE offers a unique opportunity to evaluate the effects of fuel management projects while leaving all other factor...

2015
Jonatán D. Galletti Pablo R. Ruiseñor Vázquez Fernando Fuentes Bonthoux Tomás Pförtner Jeremías G. Galletti

Purpose. To thoroughly analyze corneal deformation responses curves obtained by Ocular Response Analyzer (ORA) testing in order to improve subclinical keratoconus detection. Methods. Observational case series of 87 control and 73 subclinical keratoconus eyes. Examination included corneal topography, tomography, and biomechanical testing with ORA. Factor analysis, logistic regression, and receiv...

Journal: :فیزیک زمین و فضا 0
امیر شبانیان چالش تری دانش اموخته کارشناسی ارشد، دانشگاه ازاد اسلامی واحد تهران شمال محمد علی نصر اصفهانی استادیار،گروه مهندسی آب دانشگاه شهرکرد فروزان ارکیان استادیار، دانشگاه ازاد اسلامی واحد تهران شمال

iran is a vast land of geographically specific features and the climate is quite different. each year a number of times, short intense rains caused flooding in various parts of the southern coast of the caspian sea and river flood malicious conduct is falling. the rainfall intensity is greater and more destructive floods caused heavy damage. severe flooding during the brutal summer precipitatio...

2005
S. Lee

The aim of this study is to cross-verify of multiple logistic model at Korea using a Geographic Information System (GIS). Landslide locations were identified in the 3 study areas from interpretation of aerial photographs and satellite image, field surveys, and maps of the topography, soil type, forest cover and land cover were constructed to spatial data-sets. The factors that influence landsli...

Journal: :تحقیقات جغرافیایی 0
محمد حسین سرایی گروه جغرافیا دانشگاه یزد مریم بیرانوندزاده دانشگاه آزاد اسلامی واحد خرم آباد ابراهیم رستم گورانی دانشگاه پیام نور تهران

at recent year improvement towns of country are considered for reason much accumulation, increase price of field, decrease dimension family and security cheap dwelling, natural structure khorramabad, economical changes accompanied by natural improvement population and change family from spread to nuclear increased necessity to dwelling and finally consider to vertical improvement. the method th...

2017
Yun Chen Shuai Niu Peikun Li Hongru Jia Hailiang Wang Yongzhong Ye Zhiliang Yuan

Elucidating the major drivers of bryophyte distribution is the first step to protecting bryophyte diversity. Topography, forest, substrates (ground, tree trunks, roots, rocks, and rotten wood), and spatial factor, which factors are the major drivers of bryophyte distribution? In this study, 53 plots were set in 400 m2 along the elevation gradient in Xiaoqinling, China. All bryophytes in the plo...

2004
G. M. ROGERS

Relationships between composition of secondary vegetation and environment were studied in central North Island, New Zealand. A classification procedure was used to identify broad compositional groups which included forest, broadleaved scrub, shrub-fernland, sclerophyllous scrub and shrubland, and tussock-shrubland. Generalised additive models (GAMs) were used to examine relationships between sp...

Journal: :Remote Sensing 2014
Zhiming Zhang Frieke Van Coillie Xiaokun Ou Robert R. de Wulf

The integration between vegetation data, human disturbance factors, and geo-spatial data (Digital Elevation Model (DEM) and image data) is a particular challenge for vegetation mapping in mountainous areas. The present study aimed to incorporate the relationships between species distribution (or vegetation spatial distribution pattern) and topography and human disturbance factors with remote se...

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