We discuss conserved currents constructed from the Cotton tensor and (conformal) Killing-Yano tensors (KYTs). consider corresponding charges generally then exemplify with four-dimensional Pleba\'nski-Demia\'nski metric where they are proportional to sum of squares electric magnetic charges. As part derivation, we also find two conformal in recently introduced coordinates Podolsky Vratny. The co...

This article is a comparative study of similar experiences in the American short story collection, Fire and Forget: Short Stories from the Long War edited by Roy Scranton and Matt Ghalagher and the Persian short story collection, A Vital Killing by Ahmad Dehghan as they belong to two different languages, different cultures, and different worldviews. It is an exploration of an overwhelmed psycho...

The well-established killing of bacteria by copper surfaces, also called contact killing, is currently believed to be a combined effect of bacterial contact with the copper surface and the dissolution of copper, resulting in lethal bacterial damage. Iron can similarly be released in ionic form from iron surfaces and would thus be expected to also exhibit contact killing, although essentially no...

Male-killing phenotypes are found in a variety of insects and are often associated with maternally inherited endosymbiotic bacteria. In several species of Drosophila, male-killing endosymbionts of the genus Spiroplasma have been found at low frequencies (0.1 to 3%). In this study, spiroplasma infection without causing male-killing was shown to be prevalent (23 to 66%) in Japanese populations of...