نتایج جستجو برای: spatial variation

تعداد نتایج: 634391  

Journal: :Health Science Journal of Indonesia 2021

Background: As the second-highest country in tuberculosis (TB) cases globally, Indonesia has experienced an increasing trend of notification rate last ten years; however, 34 provinces may have different risks. This study aims to examine TB risk variation across 2010-2019.
 Methods: A descriptive analysis was conducted on routine data 2010-2019 from Ministry Health. Cases included all types...

1991
S. A. Frank

Computer simulations of coevolutionary dynamics between two hosts and two parasites show that extensive spatial variation in polymorphism can be maintained among environmentally identical patches. Spatial variation can be maintained under frequent migration when the dynamics within patches are locally unstable, and the cycles in host and parasite abundances remain out of phase among patches. Ad...

2012
RACHEL L. PULLAN HUGH J. W. STURROCK RICARDO J. SOARES MAGALHÃES ARCHIE C. A. CLEMENTS SIMON J. BROOKER

The distributions of parasitic diseases are determined by complex factors, including many that are distributed in space. A variety of statistical methods are now readily accessible to researchers providing opportunities for describing and ultimately understanding and predicting spatial distributions. This review provides an overview of the spatial statistical methods available to parasitologist...

Journal: :Molecular ecology 2015
Andrea Paz Roberto Ibáñez Karen R Lips Andrew J Crawford

Hypotheses to explain phylogeographic structure traditionally invoke geographic features, but often fail to provide a general explanation for spatial patterns of genetic variation. Organisms' intrinsic characteristics might play more important roles than landscape features in determining phylogeographic structure. We developed a novel comparative approach to explore the role of ecological and l...

Journal: :The American naturalist 2001
J Weiner P Stoll H Muller-Landau A Jasentuliyana

Patterns of size inequality in crowded plant populations are often taken to be indicative of the degree of size asymmetry of competition, but recent research suggests that some of the patterns attributed to size-asymmetric competition could be due to spatial structure. To investigate the theoretical relationships between plant density, spatial pattern, and competitive size asymmetry in determin...

Journal: یافته 2006
ahmad Bitavafan-Rahabi, hosein Rajabi, mohammad reza Farsi-nejad, samira Resaneh,

Background: The nuclear medicine systems are very sensitive to the variation of the magnetic field. Photomultiplier tubes amplify low energy light signal and change it into electrical current. Low magnetic field can produce some variations in uniformity and special resolution of SPECT systems. In this study, we tried to evaluate the effects of magnetic field on the function of nuclear medic...

Journal: :Systematic biology 2002
P G Desmet R M Cowling A G Ellis R L Pressey

In this paper we explore the role that biosystematists can play in conservation planning. Conservation planning concerns the location and design of reserves that both represent the biodiversity of a region and enable the persistence of that biodiversity by maintaining key ecological and evolutionary processes. For conservation planning to be effective, quantitative targets are needed for the sp...

, ,

 This study is aimed at estimating monthly mean air temperature (Ta) using the MODIS Land Surface Temperature (LST), Normalized Difference Vegetation Index (NDVI), latitude, altitude, slope gradient and land use data during 2001-2015. The results showed that despite some spatial similarities between annual spatial patterns of Ta and LST, their variations are significantly different, so that the...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید