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EARLY EVOLUTION OF LAND PLANTS: Phylogeny, Physiology, and Ecology of the Primary Terrestrial Radiation
The Siluro-Devonian primary radiation of land biotas is the terrestrial equivalent of the much-debated Cambrian “explosion” of marine faunas, which ended with the formation of evolutionary and ecological frameworks analogous to those of modern ecosystems.
Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles.
- I. Buttinoni, Julian Bialk'e, F. Kümmel, H. Löwen, C. Bechinger, T. Speck
- Engineering, ChemistryPhysical review letters
- 17 May 2013
A (quasi-)two-dimensional colloidal suspension of self-propelled spherical particles propelled due to diffusiophoresis in a near-critical water-lutidine mixture finds that the driving stabilizes small clusters and undergoes a phase separation into large clusters and a dilute gas phase.
Microscopic theory for the phase separation of self-propelled repulsive disks
Motivated by recent experiments on colloidal suspensions, we study analytically and numerically a microscopic model for self-propelled particles lacking alignment interactions. In this model, even…
Reconfiguration as a Prerequisite for Survival in Highly Unstable Flow-Dominated Habitats
- Deane Harder, O. Speck, C. Hurd, T. Speck
- Environmental ScienceJournal of Plant Growth Regulation
- 9 December 2004
Unstable and mechanically demanding habitats like wind-exposed open fields or the wave-swept intertidal require rapid adaptive processes to ensure survival. The mechanism of passive reconfiguration…
Root anchorage of saplings and cuttings of woody pioneer species in a riparian environment
The anchorage ability of saplings may be one factor influencing the longitudinal and transverse zonation of species in floodplains, as S. elaeagnos is restricted to highly disturbed sites close to the main channel, whereas A. incana and P. nigra occupy more stabilized habitats.
Fluctuation-dissipation theorem in nonequilibrium steady states
In equilibrium, the fluctuation-dissipation theorem (FDT) expresses the response of an observable to a small perturbation by a correlation function of this variable with another one that is conjugate…
Process Sequences In Biomimetic Research
The presented methodology of doing biomimetics has proven effective in many R&D projects and two principally different approaches can be distinguished as ‘bottom-up process’ and ‘top-down process”.
Integral fluctuation theorem for the housekeeping heat
The housekeeping heat Qhk is the dissipated heat necessary to maintain the violation of detailed balance in nonequilibrium steady states. By analysing the evolution of its probability distribution,…
Diversity of Mechanical Architectures in Climbing Plants: An Evolutionary Perspective
The results suggest that the origin and type of climbing architecture can be heavily influenced by ancestral growth forms and architectures, including the presence/absence of secondary growth and the number, complexity and coordination of development of primary or secondary tissues with varying mechanical properties.
Comparison of mechanical properties of four large, wave-exposed seaweeds.
Overall, there seems to be no correlation between single material properties and the size or habitat position of the tested seaweed species.