this study was conducted to define the prevalence and types of corneal astigmatism in relation with corneal optical power, axial length, sex and patient age. 641 cataract patients were included in a descriptive study. complete eye examinations were included in a descriptive study. complete eye examinations were performed. the data were analysed by standard procedures including analysis of varia...

znfe2o4 mixed spinel ferrite nanoparticles obtained through a citrate-nitrate combustion method. ignited products calcined at different temperatures in 600-900ºc range and effect of calcination treatment temperature investigated. final products characterized by x-ray diffraction (xrd), fourier-transform infrared spectroscopy (ftir), and field emission scanning electron microscopy (fesem). the a...

A viscosity model, based on Eyring’s absolute rate theory combined with a cubic PR equation of state and Wong-Sandler mixing rule, has been proposed in order to correlate viscosities of aqueous solutions of alkanolamine mixtures at atmospheric pressure and different temperatures. In the proposed method, the energy and size parameters in studied Equation of State (EoS) have been obtained usi...

Climate change is expected to induce many ecological and evolutionary changes. Among these is the hypothesis that climate warming will cause a reduction in body size. This hypothesis stems from Bergmann's rule, a trend whereby species exhibit a smaller body size in warmer climates, and larger body size under colder conditions in endotherms. The mechanisms behind this rule are still debated, and...

Classification Association Rule Mining (CARM) is an approach to classifier generation that builds an Association Rule Mining based classifier using Classification Association Rules (CARs). Regardless of which particular CARM algorithm is used, a similar set of CARs is always generated from data, and a classifier is usually presented as an ordered list of CARs, based on a selected rule ordering ...

The "dominance theory" of HALDANE'S rule postulates that hybrids of the heterogametic sex are more likely to be inviable or sterile than the homogametic sex because some of the epistatic incompatibilities contributing to postzygotic isolation behave as X-linked partial recessives. When this is true, pairs of taxa with relatively large X chromosomes should require less divergence time, on averag...

Dai, Li, and Wu [11] [30] proposed Rule k, a localized approximation algorithm that attempts to find a small connected dominating set in a graph. In this paper we consider the “average case”performance of Rule k for the model of random unit disk graphs constructed from n random points in an `n × `n square. We show that if k ≥ 3 and `n = o(√n), then the expected size of the Rule k dominating set...

Cope's Rule is the tendency for organisms in evolving lineages to increase in size over time. The concept is detailed in many textbooks, but has rarely been demonstrated. Many suggestions of the benefits of large body size exist, but none has yet been confirmed empirically. Using a large-scale analysis of recent studies, Kingsolver and Pfennig have now shown how size benefits survival, mating s...

This essay looks at the historical significance of five APS classic papers that are freely available online: McPhedran AM, Wuerker RB, and Henneman E. Properties of motor units in a homogeneous red muscle (soleus) of the cat. J Neurophysiol 28: 71–84, 1965 (http://jn.physiology.org/cgi/reprint/28/1/71). Wuerker RB, McPhedran AM, and Henneman E. Properties of motor units in a heterogeneous pale ...

F o r the p r o b l e m : rain f ( x ) s u b j e c t to x ~ R ° C E n w h e r e R ° is an open set , A r m i j o in [1] p r o p o s e d the fo l lowing a lgo r i thm in c o n j u n c t i o n wi th C a u c h y ' s m e t h o d of s t e e p e s t de scen t . G iven a po in t Xk C R °, and the g r a d i e n t v e c t o r Vf(Xk), find i (k) , the sma l l e s t in teger f rom i = 0,1 . . . . . such t...