Now showing items 21-30 of 148
Graphene nanoribbon array fabrication by oxygen gas plasma etching through sub-micrometer porous filters
(Georgia Institute of Technology, 2009-08-07)
We investigate a novel method of fabricating a network of graphene nanoribbon structures. The process is a sharp departure from conventional nanolithographic techniques in both method and amount of time required. Epitaxial ...
Persistent holes in a fluid
(Georgia Institute of Technology, 2004-05-07)
We observe stable holes in a vertically oscillated 0.5 cm deep aqueous suspension of cornstarch. Holes appear only if a finite perturbation is applied to the layer for accelerations α above 10g. Holes are circular and ...
March of the SandBots
(Georgia Institute of Technology, 2009-04)
Goldman at Georgia Tech, Koditschek and Komsuoglu at the University of Pennsylvania, in Philadelphia, and other collaborators - are hoping that by studying the zebra-tailed lizard and a menagerie of other desert-dwelling ...
Stationary state volume fluctuations in a granular medium
(Georgia Institute of Technology, 2005-03-30)
A statistical description of static granular material requires ergodic sampling of the phase space spanned by the different configurations of the particles. We periodically fluidize a column of glass beads and find that ...
Crucial role of sidewalls in velocity distributions in quasi-two-dimensional granular gases
(Georgia Institute of Technology, 2004-10-19)
Our experiments and three-dimensional molecular dynamics simulations of particles confined to a vertical monolayer by closely spaced frictional walls (sidewalls) yield velocity distributions with non-Gaussian tails and a ...
Sensitive dependence of the motion of a legged robot on granular media
(Georgia Institute of Technology, 2009-03-03)
Legged locomotion on flowing ground (e.g., granular media) is unlike locomotion on hard ground because feet experience both solid- and fluid-like forces during surface penetration. Recent bioinspired legged robots display ...
Robotics in Scansorial Environments
(Georgia Institute of Technology, 2005)
Design of a Bio-inspired Dynamical Vertical Climbing Robot
(Georgia Institute of Technology, 2008)
This paper reviews a template for dynamical climbing originating in biology, explores its stability properties in a numerical model, and presents emperical data from a physical prototype as evidence of the feasibility of ...
The RiSE Climbing Robot: Body and Leg Design
(Georgia Institute of Technology, 2006)
The RiSE robot is a biologically inspired, six legged climbing robot, designed for general mobility in scansorial (vertical walls, horizontal ledges, ground level) environments. It exhibits ground reaction forces that are ...
Nanojets – Formation, characterization and applications
(Georgia Institute of Technology, 2008-12-21)