PhotonicsViewsVolume 18, Issue 2 p. 1-1 EditorialFree Access So Much Achieved – Yet to Do A wide range of products and services have received attention by the public but we still a long way go Lutz Aschke, Aschke Managing Director, MahrSearch for more papers this author First published: 14 April 2021 https://doi.org/10.1002/phvs.202170201AboutPDF ToolsExport citationAdd favoritesTrack citation ...

The introduction of alien fish species in wetland ecosystems could have a great impact on freshwater communities and ecological processes. Despite has been noticed as one the principal cause extinctions, ecosystem processes alteration, change aquatic community assemblage, very few data about reptiles are available. As study model we used two neighbour sub-populations endangered Sicilian pond tu...

The paper initially studies both the s-T3-separation and semi-T3-separation axiom of Khalimsky (K-for brevity) topological spaces. To do this work, first we investigate some properties semi-open semi-closed sets with respect to operations union or intersection further, a homeomorphism, semi-homeomorphism. Next, study various semi-topological K-topological spaces such as simple K-paths. Finally,...