Aerosol persistence in relation to possible transmission of SARS-CoV-2

Transmission of SARS-CoV-2 leading to COVID-19 occurs through exhaled respiratory droplets from infected humans. Currently, however, there is much controversy over whether respiratory aerosol micro...

A mathematical framework for estimating risk of airborne transmission of COVID-19 with application to face mask use and social distancing

A mathematical model for estimating the risk of airborne transmission of a respiratory infection such as COVID-19 is presented. The model employs basic concepts from fluid dynamics and incorporates...

The effect of heterogeneity on hypergraph contagion models

The dynamics of network social contagion processes such as opinion formation and epidemic spreading are often mediated by interactions between multiple nodes. Previous results have shown that these...

Perfectly absorbing dielectric metasurfaces for photodetection

Perfect absorption of light by an optically thin metasurface is among several remarkable optical functionalities enabled by nanophotonics. This functionality can be introduced into optoelectronic d...

Numerical investigation of aerosol transport in a classroom with relevance to COVID-19

The present study investigates aerosol transport and surface deposition in a realistic classroom environment using computational fluid-particle dynamics simulations. Effects of particle size, aeros...

Coherent Ising machines—Quantum optics and neural network Perspectives

A coherent Ising machine (CIM) is a network of optical parametric oscillators (OPOs), in which the “strongest” collective mode of oscillation at well above threshold corresponds to an optimum solut...

Diffusion by a Random Velocity Field

Single‐particle diffusion in a multivariate‐normal, incompressible, stationary, isotropic velocity field is calculated in two and three dimensions by computer simulation and by the direct‐interacti...

Targeted free energy estimation via learned mappings

Free energy perturbation (FEP) was proposed by Zwanzig [J. Chem. Phys. 22, 1420 (1954)] more than six decades ago as a method to estimate free energy differences and has since inspired a huge body ...

Two-dimensional viscous flow simulation of a shock accelerated heavy gas cylinder

Numerical simulation of Richtmyer–Meshkov instability (RMI) is conducted using an improved localized artificial diffusivity (LAD) method, which is used to treat discontinuities in the form of mater...

Record indoor magnetic field of 1200 T generated by electromagnetic flux-compression

A peak field of 1200 T was generated by the electromagnetic flux-compression (EMFC) technique with a newly developed megagauss generator system. Magnetic fields closely up to the turn-around peak w...

Production of Very High Magnetic Fields by Implosion

Magnetic fields are produced in the 10–15 megagauss range by use of high explosives which compress the flux obtained from initial fields of approximately a hundred thousand gauss. The fields descri...

On the evolution of a primordial interstellar gas cloud

In 1796, Laplace conjectured that a primitive interstellar gas cloud may evolve under the influence of its own gravity to form a system of isolated rings, which may in turn lead to the formation of...

Statistical Mechanics of Fluid Mixtures

Expressions for the chemical potentials of the components of gas mixtures and liquid solutions are obtained in terms of relatively simple integrals in the configuration spaces of molecular pairs. T...

Compressive ghost imaging

We describe an advanced image reconstruction algorithm for pseudothermal ghost imaging, reducing the number of measurements required for image recovery by an order of magnitude. The algorithm is ba...

Virus transmission from urinals

A virus-laden particle movement from urinal flushing is simulated. Similar to the toilet-induced flushing, results indicate that the trajectory of the particles triggered by the urinal flushing man...