Browsing FAS Scholarly Articles by Title
Now showing items 4652-4671 of 18292
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El Niño Chaos: Overlapping of Resonances Between the Seasonal Cycle and the Pacific Ocean-Atmosphere Oscillator
(American Association for the Advancement of Science, 1994)The El Niño—Southern Oscillation (ENSO) cycle is modeled as a low-order chaotic process driven by the seasonal cycle. A simple model suggests that the equatorial Pacific ocean-atmosphere oscillator can go into nonlinear ... -
“El óxido se posó en mi lengua”: Especularidad, espectralidad y memoria de l a muerte en Antonio Gamoneda y Marcel Proust
(Johns Hopkins University Press, 2015) -
El: A Program for Ecological Inference
(American Statistical Association, 2004)The program EI provides a method of inferring individual behavior from aggregate data. It implements the statistical procedures, diagnostics, and graphics from the book A Solution to the Ecological Inference Problem: ... -
Elaboration of B Gene Function to Include the Identity of Novel Floral Organs in the Lower Eudicot Aquilegia (Ranunculaceae)
(American Society of Plant Biologists, 2007)The basal eudicot Aquilegia (columbine) has an unusual floral structure that includes two morphologically distinct whorls of petaloid organs and a clearly differentiated fifth organ type, the staminodium. In this study, ... -
Elastic energy storage in the shoulder and the evolution of high-speed throwing in Homo
(2013)Although some primates, including chimpanzees, throw objects occasionally1,2, only humans regularly throw projectiles with high speed and great accuracy. Darwin noted that humans’ unique throwing abilities, made possible ... -
Elastic Instability of a Crystal Growing on a Curved Surface
(American Association for the Advancement of Science, 2014)Although the effects of kinetics on crystal growth are well understood, the role of substrate curvature is not yet established. We studied rigid, two-dimensional colloidal crystals growing on spherical droplets to understand ... -
Elastic leak of a seal
(Elsevier BV, 2014)An elastomeric seal may leak by elastic deformation without any material damage. We describe elastic leak using a theoretical model, and watch a seal deform and leak using a transparent experimental setup. The elastomer ... -
Elastic metamaterials for tuning circular polarization of electromagnetic waves
(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
(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
(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
(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
(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
(American Physical Society, 2008-11-19) -
Elastodynamic Analysis for Slow Tectonic Loading with Spontaneous Rupture Episodes on Faults with Rate- and State-dependent Friction
(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
(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
(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
(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
(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
(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
(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 ...