background: the purpose of this study was to evaluate the fallopian tube of women with infertility and to observe whether there are any significant differences in the hysterosalpingogram findings with regard to prevalence of tubal block in women with primary and secondary infertility. methods: a retrospective study of unilateral and bilateral tubal obstruction in hysterosalpingogram of women wi...

in this paper, we consider a cooperative cognitive radio network in which there is an ofdm primary link and multiple single carrier secondary links.the primary link is required to maintain its secrecy rate above a predefined threshold. if the secrecy rate requirement is not satisfied, the secondary system help primary link to maintain its secrecy rate requirement. in doing so, the secondary trans...

abstractlet w be a non-empty subset of a free group. the automorphism of a group g is said to be a marginal automorphism, if for all x in g,x^−1alpha(x) in w^*(g), where w^*(g) is the marginal subgroup of g.in this paper, we give necessary and sufficient condition for a purelynon-abelian p-group g, such that the set of all marginal automorphismsof g forms an elementary abelian p-group.

background: frequent infections is among the most frequent clinical dilemmas for primary care physicians. immunodeficiency disorders are a heterogeneous group of illnesses that predispose patients to the recurrent infections, autoimmunity and malignancies. the aim of this study was to evaluate the clinical and laboratory data collected for the final diagnosis of patients referred with recurrent...

Spontaneous pneumothorax can be either primary due to the rupture of subpleural bleb or secondary due to underlying lung disease, usually bullous emphysema.1 Relatively little is known about the causative factors of spontaneous pneumothorax in Arab Countries.1 This is the first study and the primary step towards understanding the risk factors and causes of spontaneous pneumothorax in Syria.Syri...

concentrations of several solutes – nitrate, arsenic, sulfate, boron, chloride, and bromide – along with total dissolved solids (tds) in ten counties bordering the brazos river in east-central texas were compiled, mapped, and analyzed relative to regional land use and geology. agriculture and oil/gas production are major activities and potential sources of groundwater contamination in the study...