BACKGROUND Accurate measurement of free thyroxine (FT(4)) is important for diagnosing and managing thyroid disorders. Most laboratories measure FT(4) by direct analogue immunoassay methods. The validity of these methods have recently been questioned. The inverse log-linear relationship between FT(4) and thyroid-stimulating hormone (TSH) is well described and provides a physiological rationale o...

introduction after occurring an earthquake, providing recovery and reconstruction programs and its quality and quantities very necessitate for returning to before disaster condition from point of providing habitats and infrastructures. in reconstruction after the earthquake, it must be considered in a manner of comprehensive, scientific and applied method. the dimensions of a successful reconst...

BACKGROUND Physical activity (PA) is beneficial in reducing pain and improving function in lower limb osteoarthritis (OA), and is recommended as a first line treatment. Self-administered questionnaires are used to assess PA, but knowledge about reliability and validity of these PA questionnaires are limited, in particular for patients with OA. The purpose of this study was to evaluate the relia...

the purpose of this study was analyzing perception of agricultural college experts and managers of islamic azad university shoushtar branch regarding development of knowledge management. agricultural college experts and managers were considered as a statistical population (n=38). this research was conducted in june 2012 to april 2013. all individuals were investigated. after confirm the validit...

many other biomedical journals dealing with cancer research, often publishes papers whose principal aim it is to test the association between quantative measurements of biological variables. When these are expressed on continuous scales, the statistics most frequently adopted to test their association are the Bravais-Pearson (parametric) and the Spearman (non-parametric) correlation coefficient...

Spearman distance is a permutation distance which might prove useful for coding, e.g. for codes on permutations. It turns out, however, that the Spearman geometry of strings is rather unruly from the point of view of error correction and error detection, and special care has to be taken to discriminate between the two notions of codeword distance and codeword distinguishability. All of this str...

PURPOSE Plasma volume and blood volume are imaging-derived parameters that are often used to evaluation intracranial tumors. Physiologically, these parameters are directly related, but their two different methods of measurements, T1-dynamic contrast enhanced (DCE)- and T2-dynamic susceptibility contrast (DSC)-MR utilize different model assumptions and approaches. This poses the question of whet...

In this study, a repeated correlative coding scheme is proposed to combat the inter-carrier interference (ICI) caused by the frequency offset in orthogonal frequency division multiplexing (OFDM) communication systems. This proposed scheme combine two ideas of the well-known methods, which are the coding of adjacent subcarriers with antipodal of the same data symbol (ICI self-cancellation) and c...