Jahanshahloo et al. (Appl Math Comput 153:215–224, 2004) propose a method for ranking extremely efficient decision making units (DMUs) in data envelopment analysis (DEA) using super-efficiency technique and l1-norm and they show that the presented method is able to eliminate the existing difficulties in some methods. This paper suggests an alternative transformation to convert the nonlinear mod...

In this research, the feasibility of using mathematical modelling in the ball milling process has been evaluated to verify the hardness changes of an aluminium nanostructure. Considering the model of normal force displacement (NFD), the radius of elastic-plastic and normal displacement of two balls were computed by applying analytical modelling and coding in MATLAB. Properties of balls and alum...

soil water retention curve (swrc) is important in the studies of soil and water relationship, soil conservation, irrigation scheduling, drainage, solute transport, plant growth and crop water stress. the performance of 10 models (simons et al., libardy et al., campbell, farrell and larson, van genuchten, brooks and corey, driessen, exponential bruce-luxmore, power bruce-luxmore, and rogowski) w...

A fast-growing theoretical literature on the political economy of reform has provided a sizable collection of models that have deepened our understanding concerning how distributional conflict manifests itself in the political process and can prevent efficiency-enhancing economic reform from taking place (see e.g., Allan Drazen [2000 Ch. 10, 13] for an insightful review). Unfortunately, systema...

9 Country Comparisons of Human Stroke Research Since 2001 A Bibliometric Study Kjell Asplund, MD; Marie Eriksson, PhD; Olle Persson, PhD (Stroke. 2012;43:830-837.)