Now showing items 1-6 of 6
Assessment of Corneal Epithelial Thickness in Asymmetric Keratoconic Eyes and Normal Eyes Using Fourier Domain Optical Coherence Tomography
Purpose. To compare the characteristics of asymmetric keratoconic eyes and normal eyes by Fourier domain optical coherence tomography (OCT) corneal mapping. Methods. Retrospective corneal and epithelial thickness OCT data ...
NPCirc: An R package for nonparametric circular methods
(American Statistical Association, 2014-10)
Nonparametric density and regression estimation methods for circular data are included in the R package NPCirc. Speci cally, a circular kernel density estimation procedure is provided, jointly with di erent alternatives ...
Is It Possible to Construct a Fractional Derivative Such That the Index Law Holds?
(Natural Sciences Publishing Corp., 2018-01-01)
The aim of this note is to make a brief consideration about the Index Law in fractional differentiation. We are not interested in any particular definition of fractional derivative, and that is why we will not introduce ...
A new formula to get sharp global stability criteria for one-dimensional discrete-time models
We present a new formula that makes it possible to get sharp global stability results for one-dimensional discrete-time models in an easy way. In particular, it allows to show that the local asymptotic stability of a ...
Can environmental constraints determine random patterns of plant species co-occurrence?
(John Wiley & Sons Ltd., 2015-02-13)
Plant community ecologists use the null model approach to infer assembly processes from observed patterns of species co-occurrence. In about a third of published studies, the null hypothesis of random assembly cannot be ...
R implementation of a polyhedral approximation to a 3D set of points using the α-shape
(American Statistical Association, 2014-01)
This work presents the implementation in R of the α-shape of a nite set of points in the three-dimensional space R3. This geometric structure generalizes the convex hull and allows to recover the shape of non-convex and ...