Analytical study of the motion of particles with variable electric charge

Authors: Yakovlev A. B.
Keywords: variable electric charge; the canonical equations; the near Earth space; manmade microparticles

A second order problem with nonlocal boundary conditions

Authors: Todorov Todor D.
Keywords: well-posedness; unconstrained minimization problem; nonlocal boundary conditions

Machine learning approach for student engagement automatic recognition from facial expressions

Authors: Soloviev Vladimir

Indoor radon concentrations in Al-Hasahisa and Rufaa towns in the central part of Sudan

Authors: Elzain Abd Elmoniem Ahmed
Keywords: Indoor Radon; Effective dose; CR-39; Relative risk of Lung cancer

Randić degree-based energy of graphs

Authors: Zogić E., Borovičanin B., Milovanović E. I., Milovanović I. Ž.
Keywords: Topological indices; vertex degree; Randić degree-based energy (of graph)

On some lower bounds for the Kirchhoff index

Authors: Glogić E., Matejić M., Milovanović E. I., Milovanović I. Ž.
Keywords: Topological indices; vertex degree; Kirchhoff index

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