The adsorption of gases on microporous carbons is still poorly understood, partly because the structure of these carbons is not well known. Here, a model of microporous carbons based on fullerene-like fragments is used as the basis for a theoretical study of Ar adsorption on carbon. First, a simulation box was constructed, containing a plausible arrangement of carbon fragments. Next, using a ne...

This is the first of two papers in which we consider a stock with price process defined by a stochastic differential equation driven by a process Y (·) different from Brownian motion. The adoption of such a colored noise input is motivated by an analysis of real market data. The process Y (·) is defined by a continuous-time AR(∞)-type equation and may have either short or long memory. We show t...

This study examines the ‘sweet spot’ of augmented reality (AR) through lens flow theory and has two primary objectives. First, seeks to determine whether investment in AR technologies is warranted by exploring both an a traditional shopping context. Second, unique capabilities facilitate enhanced state its positive influence across several consumer outcomes. To achieve these objectives, commerc...

We concerned on the role of secondary electrons in low pressure rf glow discharge. The Particle in Cell/Monte Carlo computer simulations (PIC/MC) was applied to simulate the discharge. The influence of secondary electron emission yield (SEY) on the plasma density was studied. Furthermore the relative density and the electron energy probability function of secondary particles, i.e., secondary el...

In the late 1990s Allan Robinson developed a theory of NPZ interactions in a laminar upwelling flow field. His approach was to use the advection reaction (AR) equation in a Lagrangian coordinate system. Recently, his theory was extended to turbulent flow by applying a probability density function to the solution of the AR equation. A review of this work is presented as well as new work examinin...

Observed bimodal tree cover distributions at particular environmental conditions and theoretical models indicate that some areas in the tropics can be in either of the alternative stable vegetation states forest or savanna. However, when including spatial interaction in nonspatial differential equation models of a bistable quantity, only the state with the lowest potential energy remains stable...

3D beamforming is a technique which allows the adaptation of the base station (BS) antenna downtilt per user equipment (UE). The selection of the appropriate downtilt depends on the propagation properties of the environment. This paper investigates the optimum downtilt angle in a typical nonline-of-sight (NLOS) urban outdoor environment. Therefore measurements with variable downtilt have been c...