Aleksander Astel's (D.Sc., Associate Professor at Pomeranian University in Słupsk, Poland) main research interests concern the application of multivariate statistics for treatment classification and modeling of environmental data and systems as well as modeling of ecological objects by mathematical methods. His Master of Science thesis concerned an assessment of rainwater quality as an indicator of atmospheric pollution. His Ph.D. thesis concerned an application of chemometrical techniques in the assessment of atmospheric pollution by the means of rainwater analysis while the habilitation work was focused on the application of self-organizing Kohonen's nets as efficient tools in environmental data exploration. He is an author of more than 80 scientific papers published in indexed, international journals, several conference posters, and chapters in scientific books. The total Impact Factor of his published papers is higher than 85, with more than 1200 citations. He is a member of the Editorial Boards of the International Journal of Environment and Health, The Open Hydrology Journal, and Open Chemistry.