Now showing items 1-9 of 9

    • Bending forces plastically deform growing bacterial cell walls 

      Amir, Ariel; Babaeipour, F.; McIntosh, D. B.; Nelson, David R.; Jun, Suckjoon (Proceedings of the National Academy of Sciences, 2014)
      Cell walls define a cell shape in bacteria. They are rigid to resist large internal pressures, but remarkably plastic to adapt to a wide range of external forces and geometric constraints. Currently, it is unknown how ...
    • Cell Size Regulation in Bacteria 

      Amir, Ariel (American Physical Society (APS), 2014)
      Various bacteria such as the canonical gram negative Escherichia coli or the well-studied gram positive Bacillus subtilis divide symmetrically after they approximately double their volume. Their size at division is not ...
    • Discoveries in Phononic Crystals and Acoustic Metamaterials 

      Wang, Pai (2015-10-13)
      Phononic crystals and acoustic metamaterials are heterogeneous materials that enable manipulation of elastic waves. An important characteristic of these heterogeneous systems is their ability to tailor the propagation of ...
    • Getting into shape: How do rod-like bacteria control their geometry? 

      Amir, Ariel; van Teeffelen, Sven (Springer Science + Business Media, 2014)
      Rod-like bacteria maintain their cylindrical shapes with remarkable precision during growth. However, they are also capable to adapt their shapes to external forces and constraints, for example by growing into narrow or ...
    • Non-Hermitian localization in biological networks 

      Amir, Ariel; Hatano, Naomichi; Nelson, David R. (American Physical Society (APS), 2016)
      We explore the spectra and localization properties of the N-site banded one-dimensional nonHermitian random matrices that arise naturally in sparse neural networks. Approximately equal numbers of random excitatory and ...
    • Simultaneous regulation of cell size and chromosome replication in bacteria 

      Ho, Po-Yi; Amir, Ariel (Frontiers Media S.A., 2015)
      Bacteria are able to maintain a narrow distribution of cell sizes by regulating the timing of cell divisions. In rich nutrient conditions, cells divide much faster than their chromosomes replicate. This implies that cells ...
    • Surprises in Numerical Expressions of Physical Constants 

      Amir, Ariel; Lemeshko, Mikhail; Tokieda, Tadashi (Mathematical Association of America, 2016)
      In science, as in life, ‘surprises’ can be adequately appreciated only in the presence of a null model, what we expect a priori. In physics, theories sometimes express the values of dimensionless physical constants as ...
    • Theory of Interacting Dislocations on Cylinders 

      Amir, Ariel; Paulose, Jayson; Nelson, David R. (American Physical Society, 2013)
      We study the mechanics and statistical physics of dislocations interacting on cylinders, motivated by the elongation of rod-shaped bacterial cell walls and cylindrical assemblies of colloidal particles subject to external ...
    • Universal frequency-dependent conduction of electron glasses 

      Amir, Ariel (IOP Publishing, 2014)
      Characterizing the frequency-dependent response of amorphous systems and glasses can provide important insights into their physics. Here, we study the response of an electron glass, where Coulomb interactions are important ...