نتایج جستجو برای: curvature attributes

تعداد نتایج: 108589  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1394

for a given riemannian manifold (m,g),it is an interesting question to study the existence of a conformal diffemorphism (also called as a conformal transformation) f : m ! m such that the metric g? = fg has one of the following properties: (i)(m; g?) has constant scalar curvature. (ii)(m; g?) is an einstein manifold.

ژورنال: پژوهش های ریاضی 2018

In this paper, Finsler metrics with relatively non-negative (resp. non-positive), isotropic and constant stretch curvature are studied.  In particular, it is showed that every compact Finsler manifold with relatively non-positive (resp. non-negative) stretch curvature is a Landsberg metric. Also, it is proved that every  (α,β)-metric of non-zero constant flag curvature and non-zero relatively i...

Journal: :Physical review 2023

Identifying novel topological properties of quantum states matter, such as exemplified by the quantized Hall conductance, is a valuable step towards realizing materials with attractive attributes that guarantee their imperviousness to realistic imperfections, disorder and environmental disturbances. Is gravitational coupling coefficient matter promising candidate? Substantially building on well...

Journal: :آب و خاک 0
احمد بایبوردی سیدجلال سید طباطبایی علی احمداف

abstract for evaluating nacl salinity effect on some physiological and qualitative attributes of five winter canola cultivars, an experiment was conducted in a rcd base factorial in three replicates in greenhouse of east azarbaijan agricultural research center in 2008. five salinity levels as 0, 50, 100, 150 and 200 mm nacl treated as first factor on five rape seed (fornax, licord, elite, slm04...

Journal: :Vision Research 2010
Kaitlin E.W. Laidlaw Alan Kingstone

The present study aimed to characterize the effect of a nearby distractor on vertical, horizontal, and oblique saccade curvature under normal saccade preparation times. Consistent with previous findings, longer-latency vertical saccades showed greater curvature away from a distractor than did oblique or horizontal saccades. At short latencies, vertical saccades also showed greater curvature tow...

2011
Andrea Taramelli A. Taramelli

In Geomorphology the landforms delineation and delimitation are based on traditional techniques which is usually achieved by two different approaches: semantic and geometric. The semantic approach involves interpreting aerial photographs as well as using field knowledge to map the possible landforms extent. The geometric approach involves inferring the probability of extension on related proper...

Journal: :Perception 2008
Joeri De Winter Johan Wagemans

Attneave (1954 Psychological Review 61 183-193) demonstrated that a line drawing of a sleeping cat can still be identified when the smoothly curved contours are replaced by straight-line segments connecting the positive maxima and negative minima of contour curvature. Using the set of line drawings by Snodgrass and Vanderwart (1980 Journal of Experimental Psychology: Human Learning and Memory 6...

Journal: :Science 2013
Martin D Hurst Simon M Mudd Mikael Attal George Hilley

Earth's surface archives the combined history of tectonics and erosion, which tend to roughen landscapes, and sediment transport and deposition, which smooth them. We analyzed hillslope morphology in the tectonically active Dragon's Back Pressure Ridge in California, United States, to assess whether tectonic uplift history can be reconstructed using measurable attributes of hillslope features w...

2008
David Belton

Principal Component Analysis (PCA) is often utilised in point cloud processing as provides an efficient method to approximate local point properties through the examination of the local neighbourhoods. This process does sometimes suffer from the assumption that the neighbourhood contains only a single surface, when it may contain multiple discrete surface entities, as well as relating the prope...

Journal: :Discrete Applied Mathematics 2009
Limor Kozobay-Avraham Sergey Hosid Zeev Volkovich Alexander Bolshoy

Massive determination of complete genome sequences has led to the development of different tools for genome comparisons. Our approach is to compare genomes according to typical genomic distributions of a mathematical function that reflects a certain biological function. In this study we used comprehensive genome analysis of DNA curvature distributions in coding and non-coding regions of prokary...

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