Now showing items 21-38 of 38

    • How the Venus Flytrap Snaps 

      Forterre, Yoel; Skotheim, Jan M.; Dumais, Jacques; Mahadevan, Lakshminarayanan (Nature Publishing Group, 2005)
      The rapid closure of the Venus flytrap (Dionaea muscipula) leaf in about 100 ms is one of the fastest movements in the plant kingdom. This led Darwin to describe the plant as "one of the most wonderful in the world". The ...
    • Intermittent locomotion as an optimal control strategy 

      Paoletti, P.; Mahadevan, Lakshminarayanan (The Royal Society, 2014)
      Birds, fish and other animals routinely use unsteady effects to save energy by alternating between phases of active propulsion and passive coasting. Here, we construct a minimal model for such behaviour that can be couched ...
    • Optimal control of plates using incompatible strains 

      Jones, G W; Mahadevan, Lakshminarayanan (IOP Publishing, 2015)
      A flat plate will bend into a curved shell if it experiences an inhomogeneous growth field or if constrained appropriately at a boundary. While the forward problem associated with this process is well studied, the inverse ...
    • Optimal vein density in artificial and real leaves 

      Noblin, X.; Mahadevan, Lakshminarayanan; Coomaraswamy, I. A.; Weitz, David A.; Holbrook, Noel Michele; Zwieniecki, Maciej A. (Proceedings of the National Academy of Sciences, 2008)
      The long evolution of vascular plants has resulted in a tremendous variety of natural networks responsible for the evaporatively driven transport of water. Nevertheless, little is known about the physical principles that ...
    • The organization and control of an evolving interdependent population 

      Vural, Dervis C.; Isakov, Alexander; Mahadevan, Lakshminarayanan (The Royal Society, 2015)
      Starting with Darwin, biologists have asked how populations evolve from a low fitness state that is evolutionarily stable to a high fitness state that is not. Specifically of interest is the emergence of cooperation and ...
    • Painting with Drops, Jets, and Sheets 

      Herczynski, Andrzej; Cernuschi, Claude; Mahadevan, Lakshminarayanan (American Institute of Physics, 2011)
      A fluid dynamics analysis of Jackson Pollock’s technique opens his and other artists’ work to quantitative exploration.
    • Problems at the Nexus of Geometry and Soft Matter: Rings, Ribbons and Shells 

      Yong, Ee Hou (2012-08-17)
      There has been an increasing appreciation of the role in which elasticity plays in soft matter. The understanding of many shapes and conformations of complex systems during equilibrium or non-equilibrium processes, ranging ...
    • Protein mediated membrane adhesion 

      Carlson, Andreas; Mahadevan, Lakshminarayanan (AIP Publishing, 2015)
      Adhesion in the context of mechanical attachment, signaling, and movement in cellular dynamics is mediated by the kinetic interactions between membrane embedded proteins in an aqueous environment. Here, we present a minimal ...
    • Rationally Designed Complex, Hierarchical Microarchitectures 

      Noorduin, W. L.; Grinthal, Alison Elizabeth; Mahadevan, Lakshminarayanan; Aizenberg, Joanna (American Association for the Advancement of Science (AAAS), 2013)
      The emergence of complex nano/microstructures is of fundamental interest, and the ability to program their form has practical ramifications in fields such as optics, catalysis and electronics. We developed carbonate/silica ...
    • Robust Error Correction in Infofuses 

      Morrison, Greg; Thomas, Sam W.; LaFratta, Christopher N.; Guo, Jian; Palacios, Manuel A.; Sonkusale, Sameer; Walt, David R.; Whitesides, George M.; Mahadevan, Lakshminarayanan (The Royal Society, 2012)
      An infofuse is a combustible fuse in which information is encoded through the patterning of metallic salts, with transmission in the optical range simply associated with burning. The constraints, advantages and unique error ...
    • The role of air in droplet impact on a smooth, solid surface 

      Kolinski, John Martin (2014-10-21)
      The impact of liquid drops on solid surfaces is a ubiquitous phenomenon in our everyday experience; nevertheless, a general understanding of the dynamics governing droplet impact remains elusive. The impact event is ...
    • A Simple Model for Nanofiber Formation by Rotary Jet-Spinning 

      Mellado, Paula; McIlwee, Holly Alice; Badrossamay, Mohammad R.; Goss, Josue; Mahadevan, Lakshminarayanan; Parker, Kevin Kit (AIP Publishing, 2011)
      Nanofibers are microstructured materials that span a broad range of applications from tissue engineering scaffolds to polymer transistors. An efficient method of nanofiber production is rotary jet-spinning (RJS), consisting ...
    • Statistical Dynamics of Flowing Red Blood Cells by Morphological Image Processing 

      Higgins, John Matthew; Eddington, David T.; Bhatia, Sangeeta; Mahadevan, Lakshminarayanan (Public Library of Science, 2009)
      Blood is a dense suspension of soft non-Brownian cells of unique importance. Physiological blood flow involves complex interactions of blood cells with each other and with the environment due to the combined effects of ...
    • Strain-Induced Alignment in Collagen Gels 

      Vader, David; Kabla, Alexandre; Weitz, David A.; Mahadevan, Lakshminarayanan (Public Library of Science, 2009)
      Collagen is the most abundant extracellular-network-forming protein in animal biology and is important in both natural and artificial tissues, where it serves as a material of great mechanical versatility. This versatility ...
    • Studies in discrete and continuum mechanics 

      Wei, Zhiyan (2014-06-06)
      We have used a combination of theory and computation to investigate collective aspects of discrete mechanical systems. The analysis involves considerations from geometry, elasticity and hydrodynamics. We have developed ...
    • Studies in Hydroelastodynamics: Singing and Swimming 

      Mukherjee, Aryesh (2012-08-03)
      In this thesis we describe two instances of the nonlinear interaction between a fluid and an elastic solid to mimic or explain some phenomenon seen in nature. We focus on the phenomena of singing of small song birds and ...
    • Termite mounds harness diurnal temperature oscillations for ventilation 

      King, Hunter; Ocko, Samuel A; Mahadevan, Lakshminarayanan (Proceedings of the National Academy of Sciences, 2015)
      Many species of millimetric fungus-harvesting termites collectively build uninhabited, massive mound structures enclosing a network of broad tunnels that protrude from the ground meters above their subterranean nests. It ...
    • Unfolding the Sulcus 

      Hohlfeld, Evan; Mahadevan, Lakshminarayanan (American Physical Society, 2011)
      Sulci are localized furrows on the surface of soft materials that form by a compression-induced instability. We unfold this instability by breaking its natural scale and translation invariance, and compute a limiting ...