Researchers at the U.S. Department of Energy's Ames Laboratory are part of collaborative team that's used a brand new instrument at the DOE's Spallation Neutron Source to probe iron-arsenic compounds, the "hottest" new find in the race to explain and

We introduce a new model for rill erosion. We start with a network similar tothat in the Discrete Web and instantiate a dynamics which makes the processhighly non-Markovian. The behavior of nodes in the streams is similar to thebehavior of

We show that using nonextensive entropy can lead to spontaneous symmetrybreaking when a parameter changes its value from that applicable for asymmetric domain, as in field theory. We give the physical reasons and alsoshow that even for symmetric Dirichlet priors,

We establish a fundamental relationship between the averaged density ofstates and the extinction mean free path of wave propagating in random media.From the principle of causality and the Kramers-Kronig relations, we showthat both quantities are connected by dispersion relations and

Focusing electromagnetic energy to sub-wavelength dimensions has become anincreasingly active field of research for a variety of applications such asHeat Assisted Magnetic Recording (HAMR), nanolithography, and nanoscale opticalcharacterization of biological cells and single molecules using near-fieldscanning optical microscopy (NSOM) technique.

In this paper, we derive entropy functions whose local equilibria aresuitable to recover the Euler-like equations in the framework of the LatticeBoltzmann method. Numerical examples are also given, which are consistent withthe above theoretical arguments.

The flow of viscous incompressible fluid over a periodically corrugatedsurface is investigated numerically by solving the Navier-Stokes equation withthe local slip and no-slip boundary conditions. We consider the effective sliplength which is defined with respect to the level of the

The climbing effect of a viscoelastic fluid when stirred by a spinning rod iswell documented and known as Weissenberg effect(Wei et al, 2006). Thisphenomenon is related to the elasticity of the fluid. We have observed thatthis effect can appear when

We study the instabilities occurring during the burst of an air balloon in aliquid. These instabilities are typical for the deformation of an interfacebetween two fluids of different densities, similar to fingering inRayleigh-Taylor instability (see e.g. Sharp, 1984). In the

We study a simple reaction-diffusion population model [proposed by A. Windusand H. J. Jensen, J. Phys. A: Math. Theor. 40, 2287 (2007)] on scale-freenetworks. In the case of fully random diffusion, the network topology cannotaffect the critical death rate, whereas

Quasi-bound states in an open system do in general not form an orthogonal andcomplete basis. It is, however, expected that the non-orthogonality is weak inthe case of well-confined states except close to a so-called exceptional pointin parameter space. We present

In this work a mu=-1 metamaterial (MM) lens for magnetic resonance imaging(MRI) is demonstrated. MRI uses surface coils to detect the radiofrequency(RF)energy absorbed and emitted by the nuclear spins in the imaged object. Theproposed MM lens manipulates the RF field

In this work a simple problem on 2D optimal shape for body immersed in aviscous flow is analyzed. The body has geometrical constraints and its profilewould be found in the class of cubics which satisfy those conditions. Theoptimal profile depends

The (3p - 1s) X-ray transition to the muonic hydrogen ground state wasmeasured with a high resolution crystal spectrometer. A Doppler effectbroadening of the X-ray line was established which could be attributed todifferent Coulomb de-excitation steps preceding the measured transition.

A steady horizontal air stream flows across a book clamped at its downstreamend. Pages lift off to form a growing bent stack whose shape is determined bythe torques associated with aerodynamic forces, weight and elastic resistanceto bending. As more pages

A scheme which allows to compute the dynamics of strongly correlatedclassical ions embedded into a partiallzy ionized quantum plasma by firstprinciples molecular dynamics is presented. The dynamically screened dustapproach of Joyce and Lampe [Phys. Rev. Lett. {\bf 88}, 095006 (2002]

The electromagnetic spectrum emitted via multiphoton Thomson scattering by anelectron colliding head-on with a strong focused laser beam is calculatedincluding radiation reaction (RR). In the investigated parameters regime, themomentum transferred on average to the electron by the laser pulseapproximately compensates

We investigate the dynamics of a 10 fs light pulse propagating in a randommedium by the direct solution of the 3D Maxwell equations. Our approach employsmolecular dynamics to generate a distribution of spherical scatterers and aparallel finite-difference time-domain code for

We present fluid dynamics videos of the motion of a boat on a two-layer orthree-layer fluid. Under certain specific conditions, this setup generateslarge amplitude interfacial waves, while no surface waves are visible. The boatis slowed down leading to a peristaltic

A light pulse propagating in a suddenly switched on photonic lattice when thecentral frequency is in the photonic band gap is an analog of the Rabi model,where the two-level system is the two resonant (i.e. Bragg-coupled) Fouriermodes of the pulse,