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 ...

A multi-pixel laser altimeter using pseudo-randomnoise-modulated fiber lasers has been developed for Climate Change research and Exploration. The architecture supports a wide set of operational parameters (range resolution, range ambiguity interval, temporal update rate) without modifications to the hardware. These parameters can be changed dynamically, based on mission operational needs. The i...

Background & Aims: The orbital cavity is an important anatomic structure in the face. It is in close connection with the skull, paranasal sinuses, and the nose. Precise knowledge of the orbital cavity dimensions can be helpful in the diagnosis and treatment of diseases associated with the orbital cavity. Due to the lack of adequate research on orbital size in Iran and the city of Kerman, the ai...

Gaia DR3 provides radial velocities for 33 million stars and spectroscopically derived atmospheric parameters more than five targets. When combined with the astrometric data, these allow us to derive orbital stellar that are key in order understand populations of Milky Way perform galactic archaeology. We use calibrated parameters, 2MASS Gaia-EDR3 photometry, parallax-based distances compute, v...

To identify members of the BAF, we applied the Hierarchical Clustering Method (HCM) to search for asteroids near (298) Baptistina in proper element space (e.g., Bendjoya and Zappalà 2002, and references therein). Proper orbital elements, being more constant over time than instantaneous orbital elements (Knežević et al. 2002), provide a dynamical criterion of whether or not a group of bodies has...

We analyze the evolution of the vortex and the asymmetrical parts of orbital angular momentum during its propagation through separable first-order optical systems. We find that the evolution of the vortex part depends on only parameters a(x), a(y), b(x), and b(y) of the ray transformation matrix and that isotropic systems with the same ratio b/a produce the same change of the vortex part of the...

We present photometric, astrometric and spectroscopic observations of the nearby (9.8 pc) low-mass binary Gl 569Bab (in turn being a companion to the early-M star Gl 569A), made with the Keck adaptive optics facility. Having observed Gl 569Bab since August 1999, we are able to see orbital motion and to determine the orbital parameters of the pair. We find the orbital period to be 892 ± 25 days,...