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At least 109 records · Page 6Linked to original sources
PubMed2000

Single-parent evolution algorithm and the optimization of Si clusters.

We describe a novel method for the structural optimization of molecular systems. Similar to genetic algorithms (GA), our approach involves an evolving population in which new members are formed by cutting and pasting operations on existing members. Unlike previous GA's, however, the population in each generation has a single parent only. This scheme has been used to optimize Si clusters with 13-23 atoms. We have found a number of new isomers that are lower in energy than any previously reported and have properties in much better agreement with experimental data.

Journal Article↗
PubMed2005

Longitudinal pathways to psychological adjustment among Black youth living in single-parent households.

A 5-wave model linking family and maternal functioning to youth psychological adjustment was tested with 139 single-mother-headed African American families with young adolescents (mean age = 11 years at recruitment) living in the rural South. Structural equation modeling indicated that an accumulation of family risk factors at Wave 1 was linked with maternal psychological functioning at Wave 2, which forecast competence-promoting parenting practices at Wave 3. These parenting practices indirectly forecast youth externalizing and internalizing behaviors 2 years later at Wave 5, through youth self-regulation at Wave 4. The hypothesized model was retested, controlling for Wave 1 youth externalizing and internalizing behaviors. All paths remained significant, indicating that the model accounted for change in youth psychological adjustment across 4 years.

Adaptation, Psychological↗