منابع مشابه
Corneal radius of curvature of the kitten and the cat.
Keratometric measurements were made from 38 kittens and cats in a closed breeding colony. Data were obtained on changes of radius of curvature of the cornea as a function of age and weight. The measurements also provided data on estimated changes with growth of corneal astigmatism.
متن کاملModeling of the Radius of Curvature for THUNDER Actuators
shop which was the fourth one held at NCSU, brought together 36 graduate students from various graduate programs across the country (see participants section for a list of students and their institutions). These graduate students represented a large number of graduate programs across the country including the The students were divided into six teams working on \industrial mathematics" problems ...
متن کاملGaussian Beam Modeling of the Radius of Curvature
A Gaussian model of the radius measurement of micro-optics has been developed and tested using simulations. The model is based on the propagation distances in the interferometer, a heretofore uninvestigated effect. The goal of the model is to determine the bias error in the radius due to the Gaussian Beam propagation model. After testing the model with varying conditions, we have concluded the ...
متن کاملAnterior corneal asphericity calculated by the tangential radius of curvature.
We propose a method of calculating the corneal asphericity (Q) and analyze the characteristics of the anterior corneal shape using the tangential radius. Fifty-eight right eyes of 58 subjects were evaluated using the Orbscan II corneal topographer. The Q-values of the flat principal semi-meridians calculated by the sagittal radius were compared to those by the tangential radius. Variation in th...
متن کاملOn radius , systole , and positive Ricci curvature
A closed Riemannian n-manifold M with Ricci M > n 1 has diameter < 7r ([M]), and equality holds only if M is isometric to the unit sphere S ~ ([Cn]). Given these results, it is natural to ask whether M is diffeomorphic to S n if the diameter of M is almost 7r. This question was answered negatively by Anderson and Otsu, who showed that even the topology of such a space can be different from the ...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1841
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)99199-3