Tropical cyclones moving into boreal forests: Relationships between disturbance areas and environmental drivers.

Tropical cyclones (TCs) are common disturbance agents in tropical and subtropical latitudes. With global warming, TCs began to move to northern latitudes, with devastating effects on boreal forests. However, it remains unclear where and when these extraordinary events occur and how they affect forest structure and ecosystem functioning.

Advances in vibrational configuration interaction theory - part 2: Fast screening of the correlation space.

For larger molecules, the computational demands of configuration selective vibrational configuration interaction theory (cs-VCI) are usually dominated by the configuration selection process, which commonly is based on second order vibrational Møller-Plesset perturbation (VMP2) theory. Here we present two techniques, which lead to substantial accelerations of such calculations while retaining the desired high accuracy of the final results. The first one introduces the concept of configuration classes, which allows for a highly efficient exploitation of the analogs of the Slater-Condon rules in vibrational structure calculations with large correlation spaces.

VCI Calculations Based on Canonical and Localized Normal Coordinates for Non-Abelian Molecules: Accurate Assignment of the Vibrational Overtones of Allene.

Vibrational configuration interaction calculations (VCI) have been performed to study the impact of the nature of the underlying coordinate systems, i.e., canonical vs localized normal coordinates, on accurate vibrational structure calculations for non-Abelian molecules.

Reduced H3 histamine receptor binding densities in the upper layers of motor cortex in rats prone to audiogenic convulsive seizures.

Fits of audiogenic seizures in rodents are considered as a model for generalized convulsive epilepsies in humans. The laminar distribution of the H3 histamine receptor binding densities was quantified in the motor cortex of two strains of rats with genetically determined generalized epilepsies, namely KM rats with audiogenic seizures only, and WAGRij rats with both audiogenic seizures and absence seizures. It was found that H3 histamine receptor binding densities in layer 2/3d of the primary and secondary motor cortices of the rats that experienced audiogenic seizure fits were significantly lower than in the cortices of control rats.

Bistable behavior of the nitrogen impurity in SiC nanoclusters.

Nitrogen doped SiC nanoclusters of various shapes and polytype structures were modeled in the framework of density functional theory using the PBE0 hybrid functional. While in the bulk crystal NC impurity may be introduced in a large concentration and shows features of the conventional shallow effective-mass donor, in the nanocluster this defect can exist in two forms with sharply different electronic structures. The first one resembles the shallow donor confined in the nanocluster with a small and nearly isotropic lattice relaxation, and spin density spread over distant shells.