The physical environment plays an important role in the transmission of respiratory infections like COVID-19. Atmospheric conditions associated to diseases influenza, adenovirus infections, parainfluenza, common cold viruses and so on. But we are still lacking evidence support influence meteorological spreading We have discussed air pollution, smoking, low temperature, proximity equator, humidi...

In this manuscript, we study the inverse problem for non self-adjoint Sturm--Liouville operator $-D^2+q$ with eigenparameter dependent boundary and discontinuity conditions inside a finite closed interval. By defining  a new Hilbert space and  using its spectral data of a kind, it is shown that the potential function can be uniquely determined by part of a set of values of eigenfunctions at som...