p b c uantitative measurement of myocardial perfusion has been a goal of cardiovascular investigators for a number of years. Positron emission tomography (PET) has allowed assessment of myocardial blood flow in absolute value (milliliters per gram per minute) (1) and is accurate at dentifying both flow-limiting epicardial coronary artery isease (CAD) as well as microvascular abnormalities. uali...

in the present study an attempt has been made to use a non-parametric method data envelopment analysis (dea) for assessing source-wise and operation-wise the technical efficiency (te) and return-to-scale (rts) for paddy production in four zones of the state of punjab, india. the results were then compared to corresponding ones already obtained from a parametric method (cobb-douglas production f...