His main contribution to theoretical neurobiology is a variational Free energy principle (active inference in the Bayesian brain).
Karl Marx | Karl Pilkington | Karl Lagerfeld | Karl G. Heider | Karl Rove | Karl Pearson | Karl May | Karl Liebknecht | Karl Friedrich Schinkel | Karl Dönitz | Karl Jenkins | Karl Stefanovic | Karl Bodmer | Karl Wilhelm Friedrich Schlegel | Karl Malone | Karl Wolf | Karl Valentin | Karl Popper | Karl Malden | Karl Kesel | Karl Barth | Karl Richard Lepsius | Karl Philipp von Wrede | Karl Kautsky | Karl Johans gate | Karl-Heinz Kämmerling | Karl | Karl Weierstrass | Karl Story | Karl Scheel |
He is a member of the Botanical Society of America and served as its President (2008 – 2009) and Editor-in-Chief of the American Journal of Botany (1995 – 2004).
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Karl J. Niklas (born 1948) is the Liberty Hyde Bailey Professor in the Department of Plant Biology at Cornell University.