نتایج جستجو برای: edge density

تعداد نتایج: 515490  

Journal: :American journal of physical anthropology 2006
Shawn M Lehman Andry Rajaonson Sabine Day

Edge effects are caused by the penetration of abiotic and biotic conditions from the matrix into forest interiors. Although edge effects influence the biogeography of many tropical organisms, they have not been studied directly in primates. Edge effects are particularly relevant to lemurs due to the loss of 80-90% of forests in Madagascar. In this study, data are presented on how biotic edge ef...

Journal: :journal of dentistry, tehran university of medical sciences 0
leila khojastehpour associate professor, department of oral and maxillofacial radiology, school of dentistry, shiraz university of medical sciences, shiraz, iran. sara mogharrabi postgraduate student of prosthodontics, department of prosthodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran. mohammad hossein dabbaghmanesh professor, endocrine and metabolism research center, shiraz university of medical sciences, shiraz, iran. nariman iraji nasrabadi dentist, member of student research committee, school of dentistry, shiraz university of medical sciences, shiraz, iran.

this study was conducted to compare the mandibular bone density between postmenopausal women with normal skeletal bone mass density (bmd) and those with low skeletal bmd using digital panoramic radiographs.one hundred fifteen postmenopausal women were divided into normal and osteoporotic/osteopenic groups. digital panoramic radiographs were prepared using digora pct sorodex equipment and promax...

Journal: :American journal of physical anthropology 2014
Bryan B Lenz Katharine M Jack Wilson R Spironello

While much is known about abiotic and vegetative edge effects in tropical forests, considerably less is known about the impact of forest edges on large mammals. In this study, we examine edge effects in a primate community to determine: 1) the distance from the edge over which edge effects in primate density are detectable, 2) whether individual species exhibit edge effects in their density, an...

2004
Douglas W. Morris James E. Diffendorfer

Theories of dispersal driven by density-dependent habitat selection demonstrate that putative examples of source /sink dynamics and balanced dispersal may also be explained by a more general pattern of bi-directional, reciprocating dispersal. Analyses of 19 years of data on dispersal by white-footed mice confirm the theory. Fitness of territorial white-footed mice living in an agricultural mosa...

2011
Zoltán Ádám Mann

The behaviour of a backtrack algorithm for graph coloring is well understood for large random graphs with constant edge density. However, sparse graphs, in which the edge density decreases with increasing graph size, are more common in practice. Therefore, in this paper we analyze the expected runtime of a usual backtrack search to color such random graphs, when the size of the graph tends to i...

1999
S. M. Reimann S. Viefers M. Manninen B. Mottelson

Spin-polarized reconstruction of the ν = 1 quantum Hall edge is accompanied by a spatial modulation of the charge density along the edge. We find that this is also the case for finite quantum Hall droplets: current spin density functional calculations show that the so-called Chamon-Wen edge forms a ring of apparently localized electrons around the maximum density droplet (MDD). The boundaries o...

2001
Pauline M. Ross

Cyprids of the barnacles Elminius covertus and Hexaminius popeiana were sampled in the water column at differing distances from the seaward edge within a mangrove forest and at different tidal elevations at the seaward edge of a mangrove forest in Sydney, Australia. At differing distances from the seaward edge of the forest, the density of settlers of E. covertus and H. popeiana was correlated ...

عبدالله محمدی تبار, , محمد ابراهیم قاضی, , هادی عربشاهی, ,

 Studies of phenomena such as charge, orbital and spin ordering in manganite has attracted much interest in recent years. These studies have been possible from an experimental point of view by the third generation synchrotron sources. X-ray with high flux density, tunable energy and polarization can be produced in synchrotron sources. Experiments have shown a resonant in peak intensity originat...

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