Now showing items 4655-4674 of 18256

    • Elastic metamaterials for tuning circular polarization of electromagnetic waves 

      Zárate, Yair; Babaee, Sahab; Kang, Sung H.; Neshev, Dragomir N.; Shadrivov, Ilya V.; Bertoldi, Katia; Powell, David A. (Nature Publishing Group, 2016)
      Electromagnetic resonators are integrated with advanced elastic material to develop a new type of tunable metamaterial. An electromagnetic-elastic metamaterial able to switch on and off its electromagnetic chiral response ...
    • Elastic Platonic Shells 

      Yong, Ee; Nelson, David R.; Mahadevan, Lakshminarayanan (American Physical Society, 2013)
      On microscopic scales, the crystallinity of flexible tethered or cross-linked membranes determines their mechanical response. We show that by controlling the type, number, and distribution of defects on a spherical elastic ...
    • Elastic Reciprocity and Symmetry Constraints on the Stress Field Due to a Surface-Parallel Distribution of Dislocations 

      Viesca, Robert Christian; Rice, James R. (Elsevier, 2011)
      Elastic reciprocity and geometric symmetry are used to constrain the expressions for stresses due to introduction of line dislocations near a half-space surface. Specifically, a relationship is shown to exist between the ...
    • Elastic scattering and rotational excitation of nitrogen molecules by sodium atoms 

      Loreau, Jérome; Zhang, Peng; Dalgarno, Alexander (AIP Publishing, 2011)
      A quantal study of the rotational excitation of nitrogen molecules by sodium atoms is carried out. We present the two-dimensional potential energy surface of the NaN2 complex, with the N2 molecule treated as a rigid rotor. ...
    • Elasticities of Substitution in Real Business Cycle Models with Home Production 

      Campbell, John; Ludvigson, Sydney (Blackwell Publishing, 2001)
      This paper constructs a simple model of home production that demonstrates the connection between the intertemporal elasticity of substitution in market consumption (IES) and the static elasticity of substitution between ...
    • Elasticity of Floppy and Stiff Random Networks 

      Wyart, M.; Liang, H.; Kabla, A.; Mahadevan, L. (American Physical Society, 2008-11-19)
    • Elastodynamic Analysis for Slow Tectonic Loading with Spontaneous Rupture Episodes on Faults with Rate- and State-dependent Friction 

      Lapusta, Nadia; Rice, James R.; Ben-Zion, Yehuda; Zheng, Gutuan (American Geophysical Union, 2000)
      We present an efficient and rigorous numerical procedure for calculating the elastodynamic response of a fault subjected to slow tectonic loading processes of long duration within which there are episodes of rapid earthquake ...
    • Elastohydrodynamics of a sliding, spinning and sedimenting cylinder near a soft wall 

      Salez, Thomas; Mahadevan, Lakshminarayanan (Cambridge University Press (CUP), 2015)
      We consider the motion of a fluid-immersed negatively buoyant particle in the vicinity of a thin compressible elastic wall, a situation that arises in a variety of technological and natural settings. We use scaling arguments ...
    • Elastomeric Origami: Programmable Paper-Elastomer Composites as Pneumatic Actuators 

      Martinez, Ramses Valentin; Fish, Carina Raquel; Chen, Xin; Whitesides, George M. (Wiley-VCH Verlag Berlin, 2012)
      The development of soft pneumatic actuators based on composites consisting of elastomers with embedded sheet or fiber structures (e.g., paper or fabric) that are flexible but not extensible is described. On pneumatic ...
    • Elastomeric substrates with embedded stiff platforms for stretchable electronics 

      Romeo, Alessia; Liu, Qihan; Suo, Zhigang; Lacour, Stéphanie P. (AIP Publishing, 2013)
      Stretchable electronics typically integrate hard, functional materials on soft substrates. Here we report on engineered elastomeric substrates designed to host stretchable circuitry. Regions of a stiff material, patterned ...
    • Elastomeric Tiles for the Fabrication of Inflatable Structures 

      Morin, Stephen A.; Kwok, Sen Wai; Lessing, Joshua; Ting, Jason; Shepherd, Robert F.; Stokes, Adam A.; Whitesides, George McClelland (Wiley-Blackwell, 2014)
      This paper describes the fabrication of 3D soft, inflatable structures from thin, 2D tiles fabricated from elastomeric polymers. The tiles are connected using soft joints that increase the surface area available for gluing ...
    • Elatinaceae are Sister to Malpighiaceae; Peridiscaceae Belong to Saxifragales 

      Davis, Charles; Chase, Mark W. (Botanical Society of America, 2004)
      Phylogenetic data from plastid (ndhF and rbcL) and nuclear (PHYC) genes indicate that, within the order Malpighiales, Elatinaceae are strongly supported as sister to Malpighiaceae. There are several putative morphological ...
    • Elder Siblings and the Taming of Hyperbolic 3-Manifolds 

      Freedman, Michael H.; McMullen, Curtis T. (Academia Scientiarum Fennica, 1998)
      A 3-manifold is tame if it is homeomorphic to the interior of a compact manifold with boundary. Marden’s conjecture asserts that any hyperbolic 3-manifold \(\mathbb{M} = \mathbb{H}^3/\Gamma\) with \(\pi_1(M)\) finitely-generated ...
    • Electoral Responsiveness and Partisan Bias in Multiparty Democracies 

      King, Gary (Comparative Legislative Research Center, 1990)
      Because the goals of local and national representation are inherently incompatible, there is an uncertain relationship between aggregates of citizen votes and the national allocation of legislative seats in almost all ...
    • Electoral Rules and Minority Representation in U.S. Cities 

      Trebbi, Francesco; Aghion, Philippe; Alesina, Alberto (MIT Press, 2008)
      This paper studies the choice of electoral rules and in particular the question of minority representation. Majorities tend to disenfranchise minorities through strategic manipulation of electoral rules. With the aim of ...
    • Electric Dipole Moments in Natural Supersymmetry 

      Nakai, Yuichiro; Reece, Matthew (Springer Nature, 2017-08)
      We discuss electric dipole moments (EDMs) in the framework of CP-violating natural supersymmetry (SUSY). Recent experimental results have significantly tightened constraints on the EDMs of electrons and of mercury, and ...
    • Electric field effect thermoelectric transport in individual silicon and germanium/silicon nanowires 

      Brovman, Yuri M.; Small, Joshua P.; Hu, Yongjie; Fang, Ying; Lieber, Charles M.; Kim, Philip (AIP Publishing, 2016)
      We have simultaneously measured conductance and thermoelectric power (TEP) of individual silicon and germanium/silicon core/shell nanowires in the field effect transistor device configuration. As the applied gate voltage ...
    • Electric field effects in graphene/LaAlO3/SrTiO3 heterostructures and nanostructures 

      Huang, Mengchen; Jnawali, Giriraj; Hsu, Jen-Feng; Dhingra, Shonali; Lee, Hyungwoo; Ryu, Sangwoo; Bi, Feng; Ghahari, Fereshte; Ravichandran, Jayakanth; Chen, Lu; Kim, Philip; Eom, Chang-Beom; D’Urso, Brian; Irvin, Patrick; Levy, Jeremy (AIP Publishing, 2015)
      We report the development and characterization of graphene/LaAlO3/SrTiO3 heterostructures. Complex-oxide heterostructures are created by pulsed laser deposition and are integrated with graphene using both mechanical ...
    • Electric field tuning of band offsets in transition metal dichalcogenides 

      Huang, Dennis; Kaxiras, Efthimios (American Physical Society, 2016)
      We use first-principles calculations to investigate the band structure evolution of WX2/MoX2 (X = S, Se) heterobilayers under a perpendicular electric field. We characterize the extent to which the type II band alignment ...
    • Electric stimulation with sinusoids and white noise for neural prostheses 

      Freeman, Daniel; Fried, Shelley; Rizzo, Joseph (Frontiers Media SA, 2010)
      We are investigating the use of novel stimulus waveforms in neural prostheses to determine whether they can provide more precise control over the temporal and spatial pattern of elicited activity as compared to conventional ...