We present results from a field study conducted in Wilmington, a suburb of Los Angeles, during 8 days of the period 26 August–10 September 2004. The tracer, sulfur hexafluoride, was released at a height of 3m from a power plant site on the shoreline, and the concentrations of the tracer were sampled on five arcs at 100, 400, 1000, 3000, and 5000m from the source during 6 h of the day starting a...

Abstract: The meteorological preprocessor used routinely at the Finnish Meteorological Institute (FMI) has been modified in order to better represent urban conditions. We have re-evaluated the roughness length, introduced the zero-displacement height and divided the surface layer into a roughness sublayer and an inertial sublayer. The friction velocity and Monin-Obukhov length are evaluated usi...

This Letter describes how out-of-plane lattice plasmon (OLP) resonances in 2D Au nanoparticle (NP) arrays show dispersive quality factors. These quality factors can be tailored simply by controlling NP height. Numerical calculations of near-field optical properties and band diagrams were performed to understand the measured dispersion effects of the OLPs. The results revealed that delocalized O...

Infectious aerosol dispersion poses significant infection risks (i.e., COVID-19) in classrooms due to dense and long occupancy. Natural ventilation is an effective strategy reduce airborne transmission. The building-related parameters, particularly openings, determine the natural effectiveness reducing contaminant dispersion, necessitating inquiry complex airflow patterns. This paper investigat...

We design an all-dielectric Lüneburg lens as an adiabatic space-variant lattice explicitly accounting for finite film thickness. We describe an all-analytical approach to compensate for the finite height of subwavelength dielectric structures in the pass-band regime. This method calculates the effective refractive index of the infinite-height lattice from effective medium theory, then embeds a ...

Dispersion profiles and surface acoustic wave attenuation characteristics of ring-shaped phononic crystals are investigated as a function the core pillar height. Finite element method simulations carried out for both band analyses transmission spectra calculations. The results reveal that increasing height in decrement local resonance frequency corresponding peaks. obtained dispersion show crys...

We did an experimental study to investigate the effect of the thermal stress due to the heater for adjusting adaptive flying height (AFH) on the readability and instability of tunneling magnetoresistance (TMR) sensors. The slider head consists of a small heater nearby the read/write elements for controlling the clearance between the read/write elements and the recording medium of the magnetic r...

INTRODUCTION Air pollution models have not so far been able to reproduce the ground level concentrations because, for example, it is recognised that deterministic models many times cannot provide an adequate correlation between hourly predictions and observed data paired in time and space. A supervised Neural Net (NN) model in forecasting concentrations levels, have to take in to account the in...