We review some of the progress in affine Toda field theories in recent years, explain why known dualities cannot easily be extended, and make some suggestions for what should be sought instead.

_________________________________________________________________________________ Since the 1960s, oral contraceptives were administered in a traditional 21/7 regimen. In recent years, new regimens (24/4, 84/7, and Lybrel) have reported that shortening the HFI decreases the risk of ovulation and unintended pregnancy. Recent literature also suggests that these regimens are associated with breakt...

In recent years, we extended the theory of Abadi and Lamport (1991) on the existence of refinement mappings. The present paper gives an overview of several extensions of the theory and of a number of recent applications to practical verifications. It concludes with a sketch of the results on semantic completeness, and a discussion of the relationship between semantic completeness and methodolog...

aim : since data about prevalence of jc virus in iranian population is scarce, this study was designed to evaluate the prevalence of jc virus in healthy individuals who had attended fajr hospital and farjam clinical laboratory in tehran, iran. background : jc virus is the causative agent of progressive multifocal encephalopathy (pml) in individuals with suppressed immune system. there are some ...

Radio frequency (RF) power is one of the most important quantity in RF metrology. In recent years significant progress has been achieved in developing new primary RF power standards with extended frequency ranges and improved uncertainties. These developments and the results of numerous international comparisons in the field of precise RF power measurements carried out in the last years are rev...