نتایج جستجو برای: patch area index
تعداد نتایج: 981082 فیلتر نتایج به سال:
Recent studies suggest that manipulation of landscape patterns is the most preferred method to reduce susceptibility of landscape to fire spread. e evaluated the effects of landscape spatial pattern and spatial heterogeneity of fuel loading on surface fire spread using the FARSITE model n Chequamegon National Forest landscape, Wisconsin. Five forest management scenarios were developed to genera...
Right ventricular outflow tract obstruction was relieved by placing outflow patches across the pulmonary annulus in 39 of 195 patients who underwent total correction of tetralogy of Fallot. The mortality rate in these 39 patients was 12.8%, which did not differ significantly from the overall mortality of 11.3% (p = 1.00). The ratio of the pulse pressure to pulmonary artery systolic pressure as ...
Upscaling ecological information to larger scales in space and downscaling remote sensing observations or model simulations to finer scales remain grand challenges in Earth system science. Downscaling often involves inferring subgrid information from coarse-scale data, and such ill-posed problems are classically addressed using regularization. Here, we apply two-dimensional Tikhonov Regularizat...
Urbanization is arguably the most dramatic form of highly irreversible land transformation. While urbanization is a worldwide phenomenon, it is exceptionally dynamic in India, where unprecedented urban growth rates have occurred over the last 30 years. In this uncontrolled explosive situation city planning lacks of data and information to measure, monitor, understand urban sprawl processes. The...
Atmospheric pollution caused by fine particulate matter (PM2.5) seriously damages human health. Urban forests have the ecological function of purifying atmosphere, which can effectively reduce ambient PM2.5 concentration. This paper analyzed ability different forest types to mitigate and explored effects quality morphological parameters on concentration patch level. The results concluded that L...
This study was carried out to model the ecosystem services, i.e., habitat quality, carbon storage, nutrient export, and soil export using InVEST software quality through integrated index across Shoor River basin, southwestern Iran, as well their relationships landscape metrics Pearson’s correlation ordered least square regression. The interactions between services efficiency, fragmentation were...
landscape characteristics and land use patterns of watershed demonstrate extension, distribution, density and abundance of human interference. these factors can affect water quality of adjacent aquatic systems within a watershed. land use changes have caused various environmental problems for zayandehroud river,turned it as a sink of pollutant. therefore this is investigated that how would land...
To improve survival rates in patients undergoing surgical ablative procedures for malignant ventricular tachycardia (VT), a frequent practice is to implant epicardial patch electrodes at the time of map-guided surgery. After operation, patients with inducible VT often receive an automatic internal cardioverter/defibrillator (AICD) implant, whereas patients with noninducible VT usually do not. I...
زمینه و هدف: سرعت تغییر اکوسیستم ها در سال های اخیر چنان بوده که امکان سازگاری موجودات زنده با تغییرات محیطی به سختی صورت می گیرد و این عارضه ناشی از عدم توجه به تغییرات کاربری اراضی و بهرهبرداری از منابع طبیعی است. هدف از این تحقیق، بررسی روند تغییرات کمی سیمای سرزمین در حوزه آبخیز قره سو و مرگ در استان کرمانشاه است.روش بررسی: به منظور پایش تغییرات از تصاویر ماهواره لندست در تاریخ های E...
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