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

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

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

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

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

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

A search for massive neutral bosons in orthopositronium decay

We have searched for an exotic decay of orthopositronium into a single photon and a short-lived neutral boson in the hitherto unexplored mass region above 900 ${\rm keV}/{\it c}^{2}$, by noting that this decay is one of few remaining candidates which could explain the discrepancy of the orthopositronium decay-rate. A high-resolution measurement of the associated photon energy spectrum was carried out with a germanium detector to search for a sharp peak from this two-body decay. Our negative result provides the upper-limits of\mbox{ }$2.0 \times 10^{-4}$ on the branching ratio of such a decay in the mass region from 847 to 1013 ${\rm keV}/{\it c}^{2}$, and excludes the possibility of this decay mode explaining the discrepancy in the orthopositronium decay-rate.Comment: a LaTeX file (text 7 pages) and a uuencoded gz-compressed PostScript file (text 7 pages + figures 4 pages