We calculate the density-dependent spin-asymmetry energy S(kf ) of isospin-symmetric nuclear matter in the three-loop approximation of chiral perturbation theory. The interaction contributions to S(kf ) originate from one-pion exchange, iterated one-pion exchange, and (irreducible) two-pion exchange with no, single, and double virtual ∆-isobar excitation. We find that the truncation to 1π-excha...

We argue that the effective Poisson ratio of cellular and porous solids is independent of the material of the solid phase, if the mechanism of the cell wall deformation is dominated by beam bending —thus rendering it to be a purely kinematic quantity. Introducing a kinematic simplification and requiring statistical isotropy, we prove a result of remarkable generality that the effective Poisson ...

In this note we use the term graph for simple, connected, undirected graphs with bounded degree vertices only. We will mostly consider infinite graphs. We denote the set of vertices of a graph G by V (G), we use E(G) for the set of edges. By ~ E(G) we denote the set of oriented edges: ~ E(G) = {(x, y) | {x, y} ∈ E(G)}. We denote the opposite orientation (y, x) of an oriented edge e = (x, y) by ...

For a quantum mechanical system with broken supersymmetry, we present a simple method of determining the ground state when the corresponding energy eigenvalue is sufficiently small. A concise formula is derived for the approximate ground state energy in an associated, well-separated, asymmetric double-well-type potential. Our discussion is also relevant for the analysis of the fermion bound sta...

A claw-free graph G(V,E) is said to be basic if there exists a matching M ⊆ E whose edges are strongly bisimplicial and such that each connected component C of G − M is either a clique or a {claw, net}-free graph or satisfies α(G[C \ V (M)]) ≤ 3. The Maximum Weight Stable Set (MWSS) Problem in a basic claw-free graph can be easily solved by first solving at most four MWSS problems in each conne...

The rates of oxidation of ferrocene derivatives by brominated molecules R-Br (CBr3CN, CBr4, CBr3NO2, CBr3COCBr3, CBr3CONH2, CBr3F, and CBr3H) were consistent with the predictions of the outer-sphere dissociative electron-transfer theory. The similar redox-reactions of the R-Br electrophiles with the typical halogen-bond acceptors tetramethyl-p-phenylenediamine (TMPD) or iodide were much faster ...

I review the effects of flavor conversion of neutrinos from stellar collapse due to masses and mixing, and discuss the motivations for their study. I consider in detail the sensitivity of certain observables (characteristics of the energy spectra of νe and ν̄e events) to the 13-mixing (sin 2 θ13) and to the type of mass hierarchy/ordering (sign[∆m213]). These observables are: the ratio of averag...

All types of end users who must make weatherdependent decisions stand to benefit greatly from knowing the expected accuracy of a particular forecast a priori. Forecast accuracy varies both spatially and temporally as a result of initial state and model errors, which change as the atmospheric flow evolves. Probabilistic weather forecasts derived from numerical weather prediction (NWP) ensembles ...