Experimental demonstration of 25 GHz wideband chaos in symmetric dual port EDFRL

We study dynamics of chaos in dual port erbium-doped fiber ring laser (EDFRL). The laser consists of two erbium-doped fibers, intracavity filters at 1549.30 nm, isolators, and couplers. At both ports, the laser transitions into the chaotic regime for pump currents greater than 100 mA via period doubling route. We calculate the Lyapunov exponents using Rosenstein’s algorithm. We obtain positive values for the largest Lyapunov exponent (≈0.2) for embedding dimensions 5, 7, 9 and 11 indicating chaos. We compute the power spectrum of the photocurrents at the output ports of the laser. We observe a bandwidth of ≈ 25 GHz at both ports. This ultra wideband nature of chaos obtained has potential applications in high speed random number generation and communication

A Novel Design of a Honeycomb PCF with Flattened Dispersion for Wideband Transmission Systems

Volume 3 Issue 11 (November 2015

RESEARCH AND REVIEWS: JOURNAL OF PHARMACEUTICS AND NANOTECHNOLOGY Nanotechnology for Herbal Drugs and Plant Research

ABSTRACT Nanotechnology is the new emerging technology in the drug discovery and it has the property of self targeting in the sense that without the attachment of a specific ligand, the nanoparticles can be used for targeting, due to their distinctively small size, at the infected pathological areas. Drug delivery system fetched a novel drug delivery system, a novel approach to overcome the drawbacks of the traditional drug delivery systems. Treatment of chronic diseases like cancer using targeted drug delivery nanoparticles is the latest achievement. By analyzing the relationship between nanotechnology and biological medicine, the application of nanotechnological methods for bioavailability enhancement of herbal drugs can be brought about. "Bhasma", a natural product, is a metallo-medicine in powder form of nano to submicron size. At present, several nano drugs are under investigation for drug delivery and more specifically for cancer therapy. Interestingly, pharmaceutical sciences are using nanoparticles to reduce toxicity and side effects of drugs

Emergency obstetric hysterectomy: review at a tertiary care hospital

Background: The objective of the study was to study indications and maternal outcome of emergency obstetric hysterectomy.Methods: A retrospective study of the cases of emergency obstetric hysterectomy performed over a period of 7.5years from 2008 to May 2016 in a tertiary care hospital was done. Maternal characteristics, indications, and maternal morbidity and mortality were analyzed.Results: During the study period there were 45 emergency obstetric hysterectomies and 28,207 deliveries, giving an incidence of 0.16% or 1.6/1000. Majority of the cases were unbooked (55.6%). It was more common in multipara (71.1%). Ruptured uterus (37.7%) and morbidly adherent placenta (26.6%) were the common indications. the maternal mortality was 2.22%.Conclusions: Emergency obstetric hysterectomy is a lifesaving procedure. The maternal outcome greatly depends on timely decision and good clinical judgment because unnecessary delay can cost life and undue haste can cause morbidity.

A comparison of intravaginal misoprostol with sublingual misoprostol for second trimester medical termination of pregnancy

Background: Second trimester abortions generally account for less number of patients as compared to first trimester abortions as patients generally come earlier as soon as pregnancy is recognized but now days due to advent of USG many cases of fetal anomaly are detected earlier accounting for increasing number of cases of second trimester.Methods: Present study was conducted among patients with pregnancy between 13-20 weeks of period of gestation (to be randomly assigned) after getting approval from institutional ethics committee and informed consent from the patient. Participants were randomly allocated to receive 400 µg of misoprostol either sublingually or intravaginally every six hours for a maximum of 5 doses. The blood pressure, pulse rate & temperature and side effects monitored every 3 hrs. If women in either group failed to abort after 48 hours of initiation of treatment termed as failure. In cases of failure they were given additional doses of sublingual misoprostol till abortion occurred. Primary outcome variable compared was success rate at 48 hours. Secondary outcome variables compared were bleeding patterns, completeness of abortion, induction abortion interval and any side effects.Results: It has been found that vaginal misoprostol 400 micro gm achieved a success rate to 100% in 48 hours, while the success rate was 93.33% with the sublingual route. (P = 0.4915, NS).Conclusions: Thus from our limited study population, we conclude that there is no significant difference in efficacy and complications between the two routes, although a larger cohort is required to get more dependable result.

Bessel-Maitland Function of Several Variables and its Properties Related to Integral Transforms and Fractional Calculus

In the recent years, various generalizations of Bessel function were introduced and its various properties were investigated by many authors. Bessel-Maitland function is one of the generalizations of Bessel function. The objective of this paper is to establish a new generalization of Bessel-Maitland function using the extension of beta function involving Appell series and Lauricella functions. Some of its properties including recurrence relation, integral representation and differentiation formula are investigated. Moreover, some properties of Riemann-Liouville fractional operator associated with the new generalization of Bessel-Maitland function are also discussed

The association of thyroid disorders with abnormal uterine bleeding

Background: Dysfunctional uterine bleeding is an abnormal bleeding from the uterus in absence of organic disease of genital tract and demonstrable extragenital cause. Thyroid dysfunction is marked by large number of menstrual aberrations. This study is aimed at detecting thyroid dysfunction in patients with provisional diagnosis of AUB and refers positive cases to physician for further evaluation.Methods: 100 cases of clinically diagnosed AUB were taken from Gynaecology OPD and inpatients of MGM hospital, Kalamboli. All patients from 19 to 45 age groups presenting as menorrhagia, acyclical metropathia, polymenorrhagia, metrorhhagia, oligomenorrhoea, polymenorrhoea and hypomenorrhoea were tested for their thyroid function by T3, T4, TSH estimations in their serum. Patients who had clinical signs and symptoms of thyroid disease, were on hormonal treatment, IUCD users, or had bleeding disorders were excluded from the study.Results: 30% of patients who were studied had thyroid dysfunction, of which 18% of patients had subclinical hypothyroidism, 9% of patients had hypothyroidism and only 3% of patients had hyperthyroidism. The commonest bleeding abnormalities in subclinical hypothyroid patients were polymenorrhaggia and menorrhaggia. Most of the hyperthyroid cases were oligomenorrhoeic.Conclusions: Both subclinical hypothyroid and profoundly hypothyroid cases together were the commonest thyroid dysfunction and menorrhagia was their commonest menstrual abnormality. So this study concludes that, biochemical evaluation of thyroid functioning should be made mandatory in all provisionally diagnosed cases of DUB to detect thyroid dysfunction.

A rare case of pregnancy with Sturge-Weber syndrome

Sturge-Weber syndrome is a rare sporadic neurocutaneous syndrome characterized by facial angiomas, ocular abnormalities (glaucoma and choroidal hemangioma), and leptomeningeal angioma. We report a case of Sturge Weber syndrome type I, associated with seizures, with gestational diabetes. She had successful labour outcome. Very few such cases have been reported in literature. The effect of pregnancy on neurological symptoms of Sturge Weber syndrome is not known.

Ependymoma in pregnancy: one suspicion can save a life

Ependymomas arise from ependymal cells that line the ventricles of the brain and the spinal canal. Ependymomas are relatively rare tumors accounting for 2-3% of all primary brain tumors in adults. We present this case of ependymoma to highlight the fact that aggressive management might be keystone in saving mothers life and even after surgical intervention, it is possible that the tumour recurs and may prove fatal. Maternal outcome in primary brain tumours in pregnancy largely depend on histologic grade of primary tumour and gestational age at which they present