in this paper, the mean value of strain energy density criterion has been used to predict the critical fracture load in specimens with u-shaped notch under bending loads. an equation for calculation of averaged strain energy density in this zone has been presented. bending loads under mode i have been considered. two cases have been studied: 1) the control volume only includes the semicircular ...

In this paper, the influence of notch depth-to-width ratios on J-integral and critical load of Aluminium 8011 alloy specimens with U-notch under Mode I loading are studied. Using experiments, for a set of specimens having different notch depth–to–width ratios, J-integral was found and the same was verified using analytical methods. Further, using the results obtained from the experiments, failu...

BACKGROUND Pulse wave analysis permits non-invasive assessment of indices of arterial elasticity. Decreased arterial elasticity results in higher pulse wave velocity and therefore earlier wave reflection. AIM The aim of this study was to evaluate the short-term variability for measurement of surface arteries. METHOD For detection of artery wall movement, a plethysmography method was used. T...

Fracture assessment of U- and V-notches is important in mechanical engineering. One can use the J-integral as fracture parameter in order to predict the critical fracture load in notches. The critical value of the J-integral in cracks is a function of the material properties. In notches, however, the material properties as well as the notch dimensions affect this critical value (named fracture ...

Objective(s): NOTCH signaling pathway is well known for its role in cell fate, cell survival, cell differentiation, and apoptosis. Some of the NOTCH signaling genes are critical for endometrial function and implantation in animals and appear to play a similar role in humans. The purpose of the current study was to investigate the potential roles of some main components of the NOTCH family in hu...

The aim of the study: to find effective and reliable predictors early diagnosis placental dysfunction.
 Materials methods. To solve tasks, we conducted a study 60 pregnant women (the main group) with dysfunction. control group consisted 30 physiological course pregnancy, who gave birth live full-term children weight growth characteristics according gestation period. state fetoplacental com...

Anesthetized dogs were artificially cooled to temperatures at which a marked prolongation of systole was observed. Under these conditions, it was possible to identify undulations in pressure during the prolonged systole without confusion with incisural pressure changes. These pressure undulations in the aortic arch were observed to occur simultaneously with but in opposite phase relations to th...