A Measurement of the Longitudinal Acceptance of the K600 Magnetic Spectrometer

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Global Dynamics of Delayed Sigmoid Beverton–Holt Equation

In this paper, certain dynamic scenarios for general competitive maps in the plane are presented and applied to some cases of second-order difference equation xn+1=fxn,xn−1, n=0,1,…, where f is decreasing in the variable xn and increasing in the variable xn−1. As a case study, we use the difference equation xn+1=xn−12/cxn−12+dxn+f, n=0,1,…, where the initial conditions x−1,x0≥0 and the parameters satisfy c,d,f>0. In this special case, we characterize completely the global dynamics of this equation by finding the basins of attraction of its equilibria and periodic solutions. We describe the global dynamics as a sequence of global transcritical or period-doubling bifurcations

The Naimark-Sacker bifurcation and symptotic approximation of the invariant curve of a certain difference equation

We compute the direction of the Naimark-Sacker bifurcation for the difference equation (Formula presented.) where p is a positive number and the initial conditions x-1 and x0 are positive numbers. Furthermore, we give the asymptotic approximation of the invariant curve

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Abstract Aim of the study To find out the relation between tumour necrosis factor alpha (TNF-α), immunoglobulin-E and antioxidant levels in the patients with mild or moderate/severe cases. Ninety subject (male , female) were enrolled in this study .Fifty patients with AR were subdivided into two groups i.e. mild (comprising 20 patients) with allergic rhinitis, moderate/ severe (comprising 30 patients) with allergic rhinitis. Forty subjects who are apparently healthy were taken as a control group. Serum TNF-α and IgE were determind by using enzyme-linked immunosorbent assay (ELISA). Malondialdehyde (MDA)levels and catalase activity were determined by using colorimetric method. Serum levels of TNF-α was significantly higher in mild and moderate/severe groups compared with control group (p<0.01). IgE and MDA were significantly higher in mild group ( p< 0.05) and in moderate/severe group(p< 0.01). Catalase was significantly decreased in mild and moderate/severe groups compared with control group (p<0.05) (p<0.01) respectively .A significant positive correlation between TNF-α , IgE and MDA in AR patients in mild and moderate/severe cases. A significant negative correlation between TNF-α ,IgE and catalase in AR patients in mild and moderate/severe cases. Oxidative stress stimulate the production of TNF-α and IgE in patients of AR. ‫الخالصة

Evaluation of platelet indices in cases of spontaneous abortion and recurrent pregnancy loss

Background: Spontaneous abortion is defined as a clinically recognized pregnancy loss before the 20th week of gestation, or an expulsion of an embryo weighing 500 g or less. .Pregnancy is a condition of hypercoagulation. study aimed to evaluate the change of platelet indices namely platelet count, platelet crit , platelet distribution width and mean platelet volume among patients . Methods: This study is observational case control study . participants were 135 and divided into three groups Group1: 45 women with spontaneous abortion. Group2: 45 women with recurrent pregnancy loss.Group3: 45 normally pregnant women Results At cut off 14.12, platelet distribution width diagnose abortion (P=0.008) with sensitivity, specificity, PPV, NPV and accuracy of 74.4%, 53.3%, 76.1%, 51.1%, 67.4% respectively.At cut off 6.98, Mean platelet volume diagnose abortion (P=0.002) with sensitivity, specificity, PPV, NPV and accuracy of 76.7%, 44.4%, 75.0%, 57.1%, 70.4% respectively. At cut off 0.31, Platelet crit diagnose abortion with sensitivity, specificity, PPV, NPV and accuracy of 31.1%, 97.8%, 96.6%, 41.5%, 53.3% respectively. There were univariate regression for value of platelet indices in prediction of abortion in the studied sample. Conclusions: Platelet indices are markers for the prediction of spontaneous abortion and recurrent pregnancy los