A new species of Cyanea (Campanulaceae, Lobelioideae), from the Ko‘olau Mountains of O‘ahu, Hawaiian Islands

by Margaret Sporck-Koehler, Tobias Koehler, Sebastian Marquez, Mashuri Waite, Adam Williams
Published 2015-02-01

Development of a repair process for manmade structures in space by using aluminium brazing and friction stir spot welding

by Tobias Koehler, Cheng-Nien Yu, Kiril Schmidt, Michael Graetzel, Yangyang Wu, Jean Pierre Bergmann, Dusan P. Sekulic
Published 2019-11-01