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We investigate the static and dynamic correlations on the synthesized heterotetranuclear magnetic cluster [Co3Ni(EtOH)]+, which, as already shown before, has a great potential to act as a magnetic nanologic element. Here we study the system with the state-of-the-art equation-of-motion coupled-cluster (EOM-CCSD) method, for which we find that although designed for dynamic correlations, it also incorporates a large part of the static correlations, and is thus an ideal method for studying optics on strongly correlated magnetic systems. We find that a major factor in the description of the static correlations is a strong d character of the molecular orbitals participating in the virtual excitations of the many-body states and propose a quantitative measure for static correlations in terms of the virtual transitions. We find an inherent dependence of the static correlations on the magnetic field, the temperature, and the spin-orbit-coupling strength. Using two distinct correlation measures we study the evolution of the static and the dynamic correlations, as well as the entropy, during laser-induced ultrafast spin dynamics. Our results indicate that generally Λ processes greatly profit from strongly statically correlated intermediate states, and thus give us an insight on how to ameliorate the elementary processes when designing magnetic nanospintronics elements.

Recently recognized important indicators of body composition are fat mass (FM), fat-free mass (FFM) and percent body fat (PBF). The aim of this cross-sectional study is to determine body composition of the pre-adolescent children by using FM, FFM, and PBF. This study was performed using data from 584 children (281 boys and 303 girls) aged 6–10 years of Ahom descent from upper Assam state, Northeast India. Four anthropometric measurements i.e. height, weight, skinfold at triceps (TSF) and sub-scapular (SSF) were taken to calculate FM, FFM, FMI, FFMI, PBF, PBF for age (PBFZ), body mass index(BMI). Age-specific mean values of FM ranged from 2.12–4.00 kg (boys) and 2.16–4.40 kg (girls) and the agespecific mean values of FFM ranged from 14.45–23.93 kg (boys) and 14.01–23.03 kg (girls). The highest PBF value was observed at the age of 6 years for both groups of the children while the lowest value was observed at the age of 10 years and 9 years for boys and girls respectively. Sex-specific mean differences between sexes were statistically significant in SSF, PBF, FM, and FMI. For future investigations in clinical and epidemiological studies, these results are very important as they can be used to identify the risk of lower or higher adiposity and body composition using PBF, FM, and FFM.

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