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Asociația Ad Astra a anunțat câștigătorii Premiilor Ad Astra 2022: http://premii.ad-astra.ro/. Proiectul și-a propus identificarea și popularizarea modelelor de succes, a rezultatelor excepționale ale cercetătorilor români din țară și din afara ei.
Publicatii proprii
Inelastic scattering of electrons by metastable hydrogen atoms in a laser field
The inelastic scattering of fast electrons by metastable hydrogen atoms in the presence of a linearly polarized laser field is theoretically studied in the domain of field intensities below 10^10 W/cm2. The interaction of the hydrogen atom with the laser field is described by first-order time-dependent perturbation theory, while the projectile electrons interacting with the laser field are described by the Gordon-Volkov wave functions. An analytic
Read moreThe Minimum Entropy Submodular Set Cover Problem
We study minimum entropy submodular set cover, a variant of the submodular set cover problem (Wolsey, Fujito, etc) that generalizes the minimum entropy set cover problem (Halperin and Karp, Cardinal et al.) We give a general bound of the approximation performance of the greedy algorithm using an approach that can be interpreted in terms of a particular type of biased network flows. As an application we rederive known results for the Minimum Entropy
Read moreHeapability, interactive particle systems, partial orders: results and open problems
We outline results and open problems concerning partitioning of integer sequences and partial orders into heapable subsequences (previously defined and established by Byers et al.)
Read moreElectrospun three dimensional scaffolds for bone tissue regeneration
Bone is a complex and highly specialized form of connective tissue which acts as the main supporting organ of the body. It is hard and dynamic by its nature, with a unique combination of organic and inorganic elements embedded in a fibrous extracellular matrix (ECM), onto which cells attach, proliferate and differentiate. When bone repair mechanisms fail, due to infection or defect magnitude, bone formation can be stimulated with the use of autologous
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