Ruptured Unilateral Twin Tubal Ectopic Pregnancy. Case Report of an Oddity & Literature Review

Background: An ectopic pregnancy (EP) is a type of conception in which, the fertilized egg is lodged outside the uterine cavity. Twin ectopic pregnancies are a rarity, and the reported cases of twin tubal pregnancies are a handful to date.Case Report: We report a case of a 35 years old patient who presented to the emergency with the complaint of lower abdominal pain and intermittent vaginal discharge. She was diagnosed with twin tubal alive gestation, underwent exploratory laparotomy and right salpingectomy.Conclusion: Ectopic pregnancy can occur even in the absence of known risk factors. Its incidence is on the rise. It is a leading cause of first-trimester maternal deaths and can be easily diagnosed with Beta HCG levels and transvaginal ultrasound

Distortion and electric field control of band structure of silicene

Density functional theory with local density approximation for exchange and correlation functional is used to tune the electronic band structure of silicene monolayer. The cohesive energy of free standing monolayer is increasing (decreasing) with external electric field (distortion). Electrons in silicene behave like Dirac fermions, when the bond angle between the Si atoms is larger than $\sim 102^{0}$. Large distortions destroy the electronic structure of silicene and silicene is no longer a semi-metallic material, and the distorted silicene acts like an $n$-doped system. Electric field opens a band gap around $K$ point in the Brillouin zone, which increases with electric field. The bond angle between the Si atoms is a key player to determine the presence or absence of Dirac cones in silicene.Comment: Europhysics Lett. Accepted (2014

A Calculus of Mobility and Communication for Ubiquitous Computing

We propose a Calculus of Mobility and Communication (CMC) for the modelling of mobility, communication and context-awareness in the setting of ubiquitous computing. CMC is an ambient calculus with the in and out capabilities of Cardelli and Gordon's Mobile Ambients. The calculus has a new form of global communication similar to that in Milner's CCS. In CMC an ambient is tagged with a set of ports that agents executing inside the ambient are allowed to communicate on. It also has a new context-awareness feature that allows ambients to query their location. We present reduction semantics and labelled transition system semantics of CMC and prove that the semantics coincide. A new notion of behavioural equivalence is given by defining capability barbed bisimulation and congruence which is proved to coincide with barbed bisimulation congruence. The expressiveness of the calculus is illustrated by two case studies.Comment: In Proceedings WWV 2015, arXiv:1508.0338

Is external debt an effective way of bringing economic reforms?

This paper investigates the adverse effects of external debt on economic performance. In order to cater the issue of errors in mathematical model developed to analyze the correlation, this paper deals by performing a hypothetical analysis on economic growth within a country at different levels of external debt. The analysis is done on all sectors at the same time to ensure maximum accuracy. The paper concludes that debt itself is not an effective way of helping underdeveloped countries. This study adds in finding effective means which will allow underdeveloped countries to get a foothold on the development ladder of economy.External Debt; Growth; Pakistan Economy; Debt overhang; Crowding out