Clinical study of ectopic pregnancy

Background: Ectopic pregnancy is pregnancy that develops following implantation anywhere other than the endometrial cavity of uterus. Objective of present study was to investigate the risk factors, clinical presentation and sites of ectopic pregnancy along with management and assessment of risk of maternal mortality and morbidity.Methods: The study was undertaken at Dr. Shankar Rao Chavhan Government Medical College and Guru Govind singhji hospital, Nanded between December 2012 and May 2014 after obtaining clearance from the Hospital Ethical Committee.Results: Maximum incidence of tubal gestation occurred between the age group of 21-25 years. Greater incidence was noted in multiparous woman. Tubectomy was the most common risk factor seen in 23.65% cases. The most common symptom observed is abdominal pain seen in 92.47% cases. The most common site of ectopic was ampulla seen in 51.61% cases. The most common mode of presentation was rupture seen in 71 cases about 76.35% cases. Unilateral salpingectomy was done in 70 cases about 75.26% cases.Conclusions: Since ectopic pregnancy remains a gynecological catastrophe in countries and a major challenge to the reproductive performance of women worldwide, it should be considered a relevant public health issue. With its rising incidence, which is likely to continue increasing because of the various factors discussed, it is necessary to devise means of early detection and treatment

Critical properties of phase transitions in lattices of coupled logistic maps

We numerically demonstrate that collective bifurcations in two-dimensional lattices of locally coupled logistic maps share most of the defining features of equilibrium second-order phase transitions. Our simulations suggest that these transitions between distinct collective dynamical regimes belong to the universality class of Miller and Huse model with synchronous update

Five-dimensional Superfield Supergravity

We present a projective superspace formulation for matter-coupled simple supergravity in five dimensions. Our starting point is the superspace realization for the minimal supergravity multiplet proposed by Howe in 1981. We introduce various off-shell supermultiplets (i.e. hypermultiplets, tensor and vector multiplets) that describe matter fields coupled to supergravity. A projective-invariant action principle is given, and specific dynamical systems are constructed including supersymmetric nonlinear sigma-models. We believe that this approach can be extended to other supergravity theories with eight supercharges in $D\leq 6$ space-time dimensions, including the important case of 4D N=2 supergravity.Comment: 18 pages, LaTeX; v2: comments added; v3: minor changes, references added; v4: comments, reference added, version to appear in PL

Bekki-Nozaki Amplitude Holes in Hydrothermal Nonlinear Waves

We present and analyze experimental results on the dynamics of hydrothermal waves occuring in a laterally-heated fluid layer. We argue that the large-scale modulations of the waves are governed by a one-dimensional complex Ginzburg-Landau equation (CGLE). We determine quantitatively all the coefficients of this amplitude equation using the localized amplitude holes observed in the experiment, which we show to be well described as Bekki-Nozaki hole solutions of the CGLE.Comment: 4 pages, uses RevTeX, 9 EPS figure

Covariant Lyapunov vectors

The recent years have witnessed a growing interest for covariant Lyapunov vectors (CLVs) which span local intrinsic directions in the phase space of chaotic systems. Here we review the basic results of ergodic theory, with a specific reference to the implications of Oseledets' theorem for the properties of the CLVs. We then present a detailed description of a "dynamical" algorithm to compute the CLVs and show that it generically converges exponentially in time. We also discuss its numerical performance and compare it with other algorithms presented in literature. We finally illustrate how CLVs can be used to quantify deviations from hyperbolicity with reference to a dissipative system (a chain of H\'enon maps) and a Hamiltonian model (a Fermi-Pasta-Ulam chain)

Large-scale collective properties of self-propelled rods

We study, in two space dimensions, the large-scale properties of collections of constant-speed polar point particles interacting locally by nematic alignment in the presence of noise. This minimal approach to self-propelled rods allows one to deal with large numbers of particles, revealing a phenomenology previously unseen in more complicated models, and moreover distinctively different from both that of the purely polar case (e.g. the Vicsek model) and of active nematics.Comment: Submitted to Phys. Rev. Let