The Cyprus Institute

About: The Cyprus Institute is a other organization based out in Nicosia, Cyprus. It is known for research contribution in the topics: Aerosol & Environmental science. The organization has 418 authors who have published 1252 publications receiving 32586 citations.

Determination of the Δ(1232) axial and pseudoscalar form factors from lattice QCD

Abstract: We present a lattice QCD calculation of the $\ensuremath{\Delta}(1232)$ matrix elements of the axial-vector and pseudoscalar currents. The decomposition of these matrix elements into the appropriate Lorentz invariant form factors is carried out, and the techniques to calculate the form factors are developed and tested using quenched configurations. Results are obtained for $2+1$ domain wall fermions and within a hybrid scheme with domain wall valence and staggered sea quarks. Two Goldberger-Treiman--type relations connecting the axial to the pseudoscalar effective couplings are derived. These and further relations based on the pion-pole dominance hypothesis are examined using the lattice QCD results, finding support for their validity. Using lattice QCD results on the axial charges of the nucleon and the $\ensuremath{\Delta}$, as well as the nucleon-to-$\ensuremath{\Delta}$ transition coupling constant, we perform a combined chiral fit to all three quantities and study their pion mass dependence as the chiral limit is approached.

Low-lying positive-parity excited states of the nucleon

Abstract: M. S. Mahbub, Alan ´O Cais, Waseem Kamleh, B.G. Lasscock, Derek B. Leinweber and Anthony G. Williams

Palaepaphos-Skales Tomb 277. More prestigious burials. With an appendix by Maria A. Socratous

Abstract: Tomb 277 in the Skales cemetery at Palaepaphos, excavated by the Cyprus Department of Antiquities, is among the richest ever found in the south-west of the island. It dates to the Cypro-Geometric III period (c. 900–750 BC) and was used for multiple burials of important members of the Palaepaphian society, namely warriors and important women (priestesses of the Great Goddess?) judging from the abundant offerings of arms and armour as well as gold jewellery respectively (including gold plaques embossed with the head of the Egyptian goddess Hathor). Notable among the offerings are two bronze basins, six small hemispherical bronze bowls, two bronze mace-heads (symbols of authority), a bronze shield of a rare type, and two richly decorated belts of oriental type. We also mention two iron swords and a bronze spearhead. Among the pottery we note the high percentage of Phoenician imports. Both inhumations and a cremation burial were observed in the tomb.

SPECT Imaging Reconstruction Method Based on Deep Convolutional Neural Network

Abstract: In this paper, we explore a novel method for tomographic image reconstruction in the field of SPECT imaging. Deep Learning methodologies and more specifically deep convolutional neural networks (CNN) are employed in the new reconstruction method, which is referred to as "CNN Reconstruction – CNNR". For training of the CNNR Projection data from software phantoms were used. For evaluation of the efficacy of the CNNR method, both software and hardware phantoms were used. The resulting tomographic images are compared to those produced by filtered back projection (FBP) [1], the "Maximum Likelihood Expectation Maximization" (MLEM) [1] and ordered subset expectation maximization (OSEM) [2].