orbital lynphangioma is a low-flow or no-flow vascular malformation. it is a congenital and isolated hemodynamic lesion in which the clinical presentation and onset are related to orbital, peri-orbital or intracranial involvement. in addition, history of previous trauma and upper respiratory tract infection are important predictor factors. high resolution mri, doppler ultrasound and ct-scan are...

the structure and properties of niobapyrimidinium complex were examined by density functionaltheory method (mpw1pw91). the effect of solvent on the structural parameters, frontier orbitalenergies and hyperpolarizability (
tot) of this molecule has been explored. the thermodynamicproperties of the title compound at different temperatures have been calculated. also, the parasubstitutionseffect on...

The problem of pre-flight calculation the orbital parameters first nanosatellite Belarusian State University CubeBel-1 before launching from Jiuquan Satellite Launch Center in China has been solved. passes over ground station were predicted based on perturbed circular motion model. initial TLE file was generated and published Internet. This allowed dozens radio amateurs 5 continents successfull...