A simple formula is derived for the extent to which the rate coefficient for termolecular ion-molecule association is affected by the kinetics not being third order. It is used to reconcile one set of measurements on N+2 + 2N2 → N+4 +...

Given a Hausdorff continuum X , we introduce a topology on X×XX×X that yields a Hausdorff continuum. We call the resulting space the Alexandroff–Urysohn square of X and prove that X has the fixed point property if and only if ...

The question of the existence and uniqueness of an M-matrix which is a square root of an M-matrix is discussed. The results are then used to derive some new necessary and sufficient conditions for a real matrix with nonpositive off diag...

Continuing his column on offshore wind, Adam Westwood from energy analysts Douglas-Westwood Ltd, looks at how offshore wind farms will be increasingly located in deeper waters further from shore, and what the effects of this trend will ...

A Windows version of XCOM, the well-known program for calculating X-ray and gamma-ray attenuation coefficients and interaction cross sections, has been developed. The new program, called WinXCom, has an improved user interface. We pres...

The history of waste minimization in the USA since 1976 shows that idealism can be economic. US industries are eager for information and assistance in adopting non-waste technology (NWT) in order to avoid the penalties of contravening l...

A new type of optical element is presented. The presented element substitutes both a thin-film plane polarizer and a narrow-band interference filter for the selected wavelength. A comparative analysis of the basic parameters for the new...

We characterize local Noetherian domains R with infinite residue field which admit only finitely many star (prime) operations. We further show that a positive integer n is equal to the number of star operations on such an ...

In this paper, we consider the nonlinear viscoelastic equation utt−Δu+∫0tg(t−τ)Δu(τ)dτ+ut|ut|m−2=u|u|p−2with initial conditions and Dirichlet boundary conditions. For nonincreasing positive functions g and for p...

In the temperature range from 20°K up to 32°K the difference in vapor pressure between normal- Air Max 1 Toronto and equilibrium hydrogen is measured simultaneously with the absolute vapour pressure of normal hydrogen. Different equat...