OBJECTIVE Women previously giving birth with cesarean section have an increased risk of postpartum hemorrhage (PPH) and retained placenta. The objective of this study was to determine if anterior placental location increased the risk of PPH and retained placenta in such women. MATERIALS AND METHODS We performed a prospective cohort study on 400 women with cesarean section delivery in a previo...

OBJECTIVES Reports indicate that repair procedures for ischaemic mitral regurgitation (IMR) are less durable than previously thought. Repair failure has been shown to be stress related. Leaflet curvature is the major determinant of valve stress. Theoretical and animal experiments have shown that saddle-shaped annuloplasty optimizes leaflet curvature when compared with standard flat ring annulop...

Abstract During the synthesis of ring polymers, mixtures and linear molecules are regularly obtained. Recent experiments simulations have shown that even small fractions can considerable modify shape rings, affecting its rheological response. Here we study blends semiflexible filaments, by using disordered assemblies open closed rubber bands. We analyze structure as a function length bands, com...

During cytokinesis, the cell undergoes a dramatic shape change as it divides into two daughter cells. Cell shape changes in cytokinesis are driven by a cortical ring rich in actin filaments and nonmuscle myosin II. The ring closes via actomyosin contraction coupled with actin depolymerization. Of interest, ring closure and hence the furrow ingression are nonconcentric (asymmetric) within the di...

We established a theoretical framework for studying nonequilibrium networks with two distinct natures essential for characterizing the global probabilistic dynamics: the underlying potential landscape and the corresponding curl flux. We applied the idea to a biochemical oscillation network and found that the underlying potential landscape for the oscillation limit cycle has a distinct closed ri...

In this contribution we will present innovations and improvements which have been developed for ring reconstruction in the CBM RICH detector. A RICH ring recognition algorithm based on the Hough Transform (HT) [1, 2] was rewritten improving the speed and ring finding efficiency. The HT is now optimized for the Hamamatsu PMT H8500-03 (22 hits per electron ring). Using the Hamamatsu PMT did not r...

In the title salt, C37H51N2O10(+)·Br(-), the 1,4-dihydro-pyridine (1,4-DHP) ring adopts a slighly puckered boat conformation. The N and opposite C atoms deviate from the least-squares plane calculated through the four other ring atoms by 0.068 (5) and 0.224 (5) Å, respectively. The orientation of both C=O groups is similar (cis with respect to the double bonds of 1,4-DHP. The pyridinium ring ha...

This paper is motivated by computational issues in shape grammar theory. Specifically, we consider the computational complexity of shape arithmetic based on the maximal representation of shapes. The maximal representation is derived from spatial operations that specify a shape algebra, which is proven to satisfy the axioms of a boolean ring. The running time of each shape operation is shown to ...

Background & aim: Cervical ectopic pregnancy is a rare variant of ectopic pregnancy, and placenta percreta is a complex and dangerous condition; patients with these conditions are difficult to manage. In this study, we present a rare case of placenta percreta in cervical pregnancy. Case report: A 32 -year-old woman with 19 weeks of gestation and gross hematuria was admitted to Qaem Hospital in ...