In this paper, we are interested in BB knots, namely knots and links whose bridge index braid equal. Supported by observations from experiments, it is conjectured that possess a special geometric/physical property (and might even be characterized it): if the knot realized (closed) springy metal wire, then equilibrium state of wire an almost planar configuration multiple (overlapping) circles. p...

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background: there is a great amount of literature concerning the effect of racial segregation on health outcomes but few papers have discussed the effect of segregation on the basis of social, demographic and economic characteristics on health. we estimated the independent effect of segregation of determinants of socioeconomic status on infant mortality in iranian population. methods: for measu...

abstract soil quality evaluation is an essential issue in soil management for agriculture and natural resource protection. soil quality indices are useful tools for determination and comparison of soils quality. using of principle component analysis in this study we selected 6 important properties as a soil quality minimum data set (mds) among 18 soil properties (tds). then, soil quality of agr...

materials and methods in this school-based cross-sectional survey, a pre-tested structured self-administered questionnaire was set for obtaining the socio-demographic data (age at menarche, number of siblings, occupation and educational attainment of their parents, etc.), while the anthropometric status data was obtained by direct measurement of weight and height. the body mass index (bmi) and ...