A covariant Hamiltonian is proposed which permits to describe in the Heisenberg picture the motion of a Wigner elementary particle in a homogeneous electromagnetic field. More precisely, at any time, ...

A general method of calculation within the multispinor formalism is proposed. It is then used to calculate the eigenvalues of the theory of particles with any spin moving in a homogeneous magnetic ...

Abstract Wet packing methods evaluate the packing density of fine materials through the determination of the apparent density and voids content of pastes with different water to solids (w/s) ratios.

Note: This is the fourth of a four-part series on biochar. You can find the first three parts of the series here. Container substrates must fulfill several functions for plant growth: create a ...

Department of Animal and Food Sciences, University of Delaware, Newark, Delaware 19716, United States ...