Editorial: Beyond Pythagoras

This fourth journal issue of Divergence Press is a selection of papers given at the Beyond Pythagoras Symposium held at the University of Huddersfield’s Centre for Research in New Music, 21-23 March 2014. The symposium sought to explore new trends in the sonic arts and experimental electronic music particularly new tuning systems, post-acousmatic and post-digital aesthetics, as well as the re-embodiment of sound production and listening

The Global Food Security Act: America\u27s Strategic Approach to Combating World Hunger

The world’s farms currently produce enough calories to adequately feed everyone on the planet. From the 1960s through 2008, per capita food availability worldwide has risen from 2220 kilocalories per person per day to 2790. Specifically, developing countries have recorded a rise in kilocalories per person per day, from 1850 to 2640. Yet, despite overall availability, around 815 million people still suffer from hunger or some form of malnutrition. Approximately one in ten people are undernourished

Search for CP and CPT violation in positronium decay

Positronium, the electron-positron bound state, is described to a good approximation by pure QED. The states of positronium have definite values of C and P. Consequently, positronium is an attractive system for the investigation of possible violations of the discrete symmetries in the leptonic sector. We discuss signals for CP and CPT violation in the decay of spin-polarized orthopositronium and show where such correlations might arise in the context of the Standard-Model Extension.Comment: Presented at the Fifth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 28-July 2, 201

Irrational constants in positronium decays

We establish irrational constants, that contribute to the positronium lifetime at $O(\alpha)$ and $O(\alpha^2)$ order. In particular we show, that a new type of constants appear, which are not related to Euler--Zagier sums or multiple $\zeta$ values.Comment: Presented at 9th Workshop on Elementary Particle Theory: Loops and Legs in Quantum Field Theory, Sondershausen, 20-25 Apr 2008. 6 pages, 3 figure

Virtual annihilation contribution to orthopositronium decay rate

Order alpha^2 contribution to the orthopositronium decay rate due to one-photon virtual annihilation is found to be delta Gamma = (alpha/pi)^2 (pi^2 ln(alpha) - 0.8622(9))Gamma_LO.Comment: 2 pages, no figure

The hydrogen atom in D=3−2ϵD=3-2\epsilon dimensions

The nonrelativistic hydrogen atom in $D=3-2\epsilon$ dimensions is the reference system for perturbative schemes used in dimensionally regularized nonrelativistic effective field theories to describe hydrogen-like atoms. Solutions to the $D$-dimensional Schr\"odinger-Coulomb equation are given in the form of a double power series. Energies and normalization integrals are obtained numerically and also perturbatively in terms of $\epsilon$. The utility of the series expansion is demonstrated by the calculation of the divergent expectation value $\langle (V')^2 \rangle$.Comment: 5 page

Exploring the Perception and Identity of Place through Sound and Image

In this paper the concept of place is explored as the stimulus for the creation of original works combining electronic music and photography. Although the compositions of both authors take inspiration from different facets of place there is a similarity of theoretical approach regarding the identity of the individual and their relationship to geographical situations and place. We will draw upon aspects of psychogeography, psychosonology, the theory of ‘atmosphere’ by Gernot Böhme to explore complexity of place in 21st centur

Perspectives on Gerhard: Selected Proceedings of the 2nd and 3rd International Roberto Gerhard Conferences

Perspectives on Gerhard expands several papers given at the 2nd and 3rd International Roberto Gerhard Conferences in 2012 and 2013. The book focuses on two aspects of Gerhard. Firstly, the pre-1939 period in which he was a student of Schoenberg and then, on returning to Catalonia, began to establish a reputation as a composer. Secondly, and more generally on the composer's stylistic and aesthetic evolution. This latter focus includes both Gerhard's approach to serialism both harmonically and melodically as well as the pivotal role the USA was to play in his later life. The book concludes with two personal reminiscences given at the conferences by Ferran Gerhard and Mariona Agustí Badia

The vertical distribution of iron stable isotopes in the North Atlantic near Bermuda

Seawater dissolved iron isotope ratios (δ^(56)Fe) have been measured in the North Atlantic near Bermuda. In a full-depth profile, seawater dissolved δ^(56)Fe is isotopically heavy compared to crustal values throughout the water column (δ^(56)Fe_(IRMM-014) = +0.30‰ to +0.71‰). Iron isotope ratios are relatively homogenous in the upper water column (between +0.30‰ to +0.45‰ above 1500 m), and δ^(56)Fe increases below this to a maximum of +0.71‰ at 2500 m, decreasing again to +0.35‰ at 4200 m. The δ^(56)Fe profile is very different from the iron concentration profile; in the upper water column [Fe] is variable while δ^(56)Fe is relatively constant, and in the deeper water column δ^(56)Fe varies while [Fe] remains relatively constant. The δ^(56)Fe profile is also not well correlated with other hydrographic tracers in the North Atlantic such as temperature, salinity, or the concentrations of oxygen, phosphate, silica, and CFC-11. The dissimilarity between δ^(56)Fe profiles and profiles of [Fe] and other hydrographic tracers shows that Fe isotope ratios provide a unique sort of information about ocean chemistry, and they suggest that Fe isotopes may therefore be a valuable new tool for tracing the global sources, sinks, and biogeochemical cycling of Fe