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Showing 1–13 of 13 results
Advanced filters: Author: Björn Hof Clear advanced filters

  • Forests are essential for both climate change mitigation and biodiversity conservation, yet how to balance these goals in managed forests remains unclear. Here, using a Europe-wide dataset, the authors find that biodiversity increases with carbon stocks, but mostly when deadwood is included.

    • Lorenzo Balducci
    • Elena Haeler
    • Sabina Burrascano
    ResearchOpen Access
    Nature Communications
    P: 1-13

  • Turbulence onset in shear flows is often modeled as a memoryless directed percolation (DP) transition. The authors show that in channel flow, turbulent stripes age near the critical point, questioning the DP analogy and revealing geometry-dependent transition dynamics.

    • Vasudevan Mukund
    • Chaitanya S. Paranjape
    • Björn Hof
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-11

  • Common mitigation measures gradually inhibit the spread of infectious diseases, yielding smooth transitions to large-scale epidemics. As Scarselli et al. show, limited testing may radically change the transition to include jumps, potentially resulting in unforseen, accelerated growth of case numbers.

    • Davide Scarselli
    • Nazmi Burak Budanur
    • Björn Hof
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6

  • Directional, non-vesicular lipid transport is responsible for fast, species-selective lipid sorting into organelle membranes.

    • Juan M. Iglesias-Artola
    • Kristin Böhlig
    • André Nadler
    ResearchOpen Access
    Nature
    Volume: 646, P: 474-482

  • Experiments, asymptotic theory and computer simulations of wall-bounded shear flow uncover a bifurcation scenario that explains the transition from localized turbulent patches to fully turbulent flow.

    • Dwight Barkley
    • Baofang Song
    • Björn Hof
    Research
    Nature
    Volume: 526, P: 550-553

  • Collective motion arises from the coordination of individuals and entails the adjustment of their respective velocities. Yet, how individuals achieve this coordination is often not understood. For migrating cells and motorized agents, Riedl et al. show that the synchronization of the intrinsic oscillator through nearest neighbour coupling establishes the necessary feedback leading to a uniform speed within the collective.

    • Michael Riedl
    • Isabelle Mayer
    • Björn Hof
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • Turbulence in pipe flows causes substantial friction (and therefore economic) losses. An experimental and numerical study now shows a solution might be to initially enhance turbulent mixing, which subsequently leads to a collapse of turbulence.

    • Jakob Kühnen
    • Baofang Song
    • Björn Hof
    Research
    Nature Physics
    Volume: 14, P: 386-390

  • The flow of a fluid down a straight pipe provides an example of a shear flow undergoing a sudden transition from laminar to turbulent motion. Experimental data and numerical calculations show that the lifetime of the turbulent state does not diverge, but rather increases exponentially with the Reynolds number.

    • Björn Hof
    • Jerry Westerweel
    • Bruno Eckhardt
    Research
    Nature
    Volume: 443, P: 59-62

  • Decades-old speculation that the transition to turbulence belongs to the directed percolation universality class is confirmed with experimental and numerical data for flow through a quasi-one-dimensional Couette geometry.

    • Grégoire Lemoult
    • Liang Shi
    • Björn Hof
    Research
    Nature Physics
    Volume: 12, P: 254-258

  • Superhydrophobic surfaces reduce the frictional drag between water and solid materials, but this effect is often temporary. The realization of sustained drag reduction has applications for water vehicles and pipeline flows.

    • Björn Hof
    News & Views
    Nature
    Volume: 541, P: 161-162

  • Zebrafish neuroectoderm morphogenesis is influenced by the mesoderm germ layer. Smutny et al. now show that friction forces between cells moving in opposite directions, mediated by E-cadherin adhesion, determine the position of the neural anlage.

    • Michael Smutny
    • Zsuzsa Ákos
    • Carl-Philipp Heisenberg
    Research
    Nature Cell Biology
    Volume: 19, P: 306-317

  • Even for flows as simple as those through pipes and channels, the nature of the transition to turbulence has remained elusive. This Perspective discusses how statistical mechanics and specifically directed percolation may provide an answer to this old problem.

    • Björn Hof
    Reviews
    Nature Reviews Physics
    Volume: 5, P: 62-72