Background: Rheumatoid arthritis (RA) is categorized as seropositive or seronegative referring to the presence absence of IgM rheumatoid factor (IgM-RF) and/ anti-citrullinated protein antibodies (ACPA). Patients with an autoimmune disease are more likely develop additional conditions than individuals without pre-existing disease. Objectives: The aims this study were examine patterns polyautoim...

Under the name prime decomposition (pd), a unique decomposition of an arbitrary N dimensional density matrix ρ into a sum of seperable density matrices with dimensions determined by the coprime factors of N is introduced. For a class of density matrices a complete tensor product factorization is achieved. The construction is based on the Chinese Remainder Theorem, and the projective unitary rep...

This study is to investigate the short- and long-run causal relationship between agglomeration (localization and urbanization) economies and labor productivity in the manufacturing sector of 28 Iranian provinces over an 11-year period, 2001–2011. Fully Modified Ordinary Least Squares (FMOLS) method was used to estimate our long-run panel data model. The empirical findings suggested that localiz...

We study opinion formation in a population of leftists, centrists and rightist. In an interaction between neighbouring agents, a centrist and a leftist can become both centrists or leftists (and similarly for a centrist and a rightist), while leftists and rightists do not affect each other. The evolution is controlled by the initial density of centrists ρ0. For any spatial dimension the system ...

Stanek et al. (astro-ph/0604113) have noted that the four low-redshift longduration gamma-ray bursts (LSB) observed to date all occurred in faint, metalpoor galaxies. Given this selection, they argue that it is improbable that there has been a substantial population of Milky Way galaxy bursts sufficiently recently to affect life on Earth. This argument ignores the heterogeneity of stellar popul...

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Using linearly polarized Ar I line radiation for ionization, the energyand angle-resolved photoemission from cw-laser-excited aligned Yb atoms in the (6s6p) 3P, state is studied. Photoelectron angular distributions have been measured for different orientations of the laser polarization vector relative to the polarization vector of the ionizing radiation. From polynomial fit coefficients for the...