The balance-flow speeds also changes with the radius of curvature R of the trajectory/isobar. The current CEO and President of Dentsu Isobar is Hidetoshi Tokumaru. Recall that the cyclostrophic trajectory was found to be an isobar. If possible, a nuclide will undergo beta decay to an adjacent isobar with lower mass. In both aforementioned cases, a heavier nucleus decays to its lighter isobar. As part of Isobar, Dentsu Isobar is part of the Dentsu Aegis Network. For all odd mass numbers , there is only one known beta-stable isobar. Roundarch Isobar was merged with Isobar U.S. in 2012 to form Roundarch Isobar. In 1934, Josef Mattauch finally formulated the isobar rule. In 2009, Roundarch (Isobar) announced the recreation of the online experience for Avis Rent-a-Car. Singapore Based Investment Fund Isobar Global Holdings PTE. He developed the Mattauch isobar rule ("Isobarenregel") in 1934. In 2018, Isobar released the Heidelberg Project app for Apple iPhone and Android mobile devices.