background: the main threats to human health from heavy metals are associated with exposure to plumb (pb), cadmium, mercury, and arsenic. some hazards that threat human health are the results of environmental factors and the relevant pollutions. some important categories of diseases including (cancers) have considerable differences in various places, as observed in their spatial prevalence and ...

in the first part of this work, correlation between optical activity and elements of magnetic susceptibility tensor (mst) for five classes of model small molecules containing a single chiral center has been studied using quantum computational techniques at dft-b3lyp level of theory with 6-311g basis set. several molecular properties are used to reduce the mst elements prior to the examination o...

This paper examines sources of cyclical movements in output, in ation and the term structure of interest rates. It employs a novel identi cation approach which uses the sign of the cross correlation function in response to shocks to catalog orthogonal disturbances. We nd that demand shocks are the dominant source output, in ation and term structure uctuations in six of the G-7 countries. Within...

We propose a method for constructing confidence intervals that account many forms of spatial correlation. The interval has the familiar “estimator plus and minus standard error times critical value” form, but we new methods value. is constructed using population principal components from given “worst‐case” correlation model. value chosen to ensure coverage in benchmark parametric model correlat...