From the classic work of Gohberg & Krein (1958 Uspekhi Mat. Nauk.XIII, 3-72. (Russian).), it is well known that the set of partial indices of a non-singular matrix function may change depending on the properties of the original matrix. More precisely, it was shown that if the difference between the largest and the smallest partial indices is larger than unity then, in any neighbourhood of the o...

Abnormal pancreatic beta cell function is known to occur in type 2 diabetes mellitus. However, direct measurement of pancreatic beta cell function is cumbersome and virtually out of reach of most laboratories in developing countries. Fortunately, insulinogenic indices may be used as surrogate measures of beta cell function. To study insulinogenic indices among type 2 diabetic Nigerians. A cross...

The results of ventilatory function tests (FVC, FEV1, and FEV %) depend to a great extent on age and height. In epidemiological investigations, the main purpose of which is to analyse the influence of environmental factors on lung function in the population, it is therefore necessary to use multiple regression methods. This form of statistical analysis is difficult and laborious when there is n...

conclusions echocardiography and 2d speckle tracking strain imaging shows improvements in left ventricular deformation indices in atrioventricular reentrant tachycardia (avrt) and atrioventricular nodal reentrant tachycardia (avnrt) patients for the mean systolic strain and strain rate at 24 hours and the three-month follow-up. in spite of the normal lvef, even during sinus rhythm, deformation ...