Food Security in the South Pacific Island Countries with Special Reference to the Fiji Islands

food security, Pacific Island countries, trade, self-reliance

A Survey of Growth and Development Issues of the Pacific Islands

This paper is a survey of some key variables with an international dimension and implications for growth and development policies in selected Pacific island countries. Results from a simple growth accounting exercise show that factor accumulation is the most dominant growth factor and that the contribution of total factor productivity is negligible. Therefore, increasing the investment rate to improve growth rate is a pragmatic medium-term policy option. Further, econometric analysis shows that foreign aid has a negligible effect on output and growth in Fiji, Solomon Islands and Papua New Guinea.macroeconomic analyses, economic growth, development issues, Pacific islands

Interpolation Properties and SAT-based Model Checking

Craig interpolation is a widespread method in verification, with important applications such as Predicate Abstraction, CounterExample Guided Abstraction Refinement and Lazy Abstraction With Interpolants. Most state-of-the-art model checking techniques based on interpolation require collections of interpolants to satisfy particular properties, to which we refer as "collectives"; they do not hold in general for all interpolation systems and have to be established for each particular system and verification environment. Nevertheless, no systematic approach exists that correlates the individual interpolation systems and compares the necessary collectives. This paper proposes a uniform framework, which encompasses (and generalizes) the most common collectives exploited in verification. We use it for a systematic study of the collectives and of the constraints they pose on propositional interpolation systems used in SAT-based model checking

Optical Response of Solid CO2_2 as a Tool for the Determination of the High Pressure Phase

We report first-principles calculations of the frequency dependent linear and second-order optical properties of the two probable extended-solid phases of CO$_2$--V, i.e. $I\bar42d$ and $P2_12_12_1$. Compared to the parent $Cmca$ phase the linear optical susceptibility of both phases is much smaller. We find that $I\bar42d$ and $P2_12_12_1$ differ substantially in their linear optical response in the higher energy regime. The nonlinear optical responses of the two possible crystal structures differ by roughly a factor of five. Since the differences in the nonlinear optical spectra are pronounced in the low energy regime, i.e. below the band gap of diamond, measurements with the sample inside the diamond anvil cell are feasible. We therefore suggest optical experiments in comparison with our calculated data as a tool for the unambiguous identification of the high pressure phase of CO$_2$.Comment: 4 pages 2 fig

Elastic properties and zone centre frequencies of Cu2O by LCAO method

The elastic properties and the phonon frequencies at the Brillouin zone centre have been investigated for the cubic cuprous oxide. The calculations under the framework of density functional theory have been carried out by deploying the periodic linear combination of atomic orbitals method. After settling the crystal structure the elastic constants have been determined. The absolute values of elastic constants are well in agreement with the experimental reports. The vibrational frequencies at the centre of the Brillouin zone are classified as the Raman and Infrared active modes and compared with the available experimental data. The contribution of vibrational modes to the Gibbs free energy, entropy and heat capacity has also been found

Coastal protection: best practices from the Pacific

Pacific coasts are constantly changing as a result of natural processes such as tides, strong currents, rain, storm surges, strong wind, cyclones and sea level rise. With increasing human activities within the coastal areas in terms of human settlement, land use changes, flow of solid and liquid waste and coastal developments such as beach ramps, jetties, causeways, coastal protection structures, reef mining and extractions of sand and beach aggregates, there is ever increasing change along Pacific coasts. In addition, climate change and climate variability and extreme weather events have exacerbated the rate of change of Pacific coasts. The coast has been defined as the zone where the land and sea meet. The main features of Pacific coasts are dominated by coral reefs, reef ridges, inter-tidal ridges, beaches, cliffs, wave actions and mangroves. Pacific coasts are designated important areas for providing vital Pacific livelihood. The coastal ecosystems, human sett lement and other major supporting services and basic infrastructure are centred on the coastal zone. Coasts are being used for many reasons. The underlying problem is that Pacific coasts are in a state of crisis. A number of human engineering interventions over the past decade have contributed and accelerated the coastal erosion problem in the Pacific Region. The Pacific coastline is over 50,532 km long. Both natural processes and human engineering work are blamed for causing coastal erosion. This guide has been produced to inform and assist coastal experts, managers, and Pacific communities understand the various measures they can take to reduce coastal erosion

A Green's function approach to transmission of massless Dirac fermions in graphene through an array of random scatterers

We consider the transmission of massless Dirac fermions through an array of short range scatterers which are modeled as randomly positioned $\delta$- function like potentials along the x-axis. We particularly discuss the interplay between disorder-induced localization that is the hallmark of a non-relativistic system and two important properties of such massless Dirac fermions, namely, complete transmission at normal incidence and periodic dependence of transmission coefficient on the strength of the barrier that leads to a periodic resonant transmission. This leads to two different types of conductance behavior as a function of the system size at the resonant and the off-resonance strengths of the delta function potential. We explain this behavior of the conductance in terms of the transmission through a pair of such barriers using a Green's function based approach. The method helps to understand such disordered transport in terms of well known optical phenomena such as Fabry Perot resonances.Comment: 22 double spaced single column pages. 15 .eps figure

Genetic overlap between diagnostic subtypes of ischemic stroke

Background and Purpose: Despite moderate heritability, the phenotypic heterogeneity of ischemic stroke has hampered gene discovery, motivating analyses of diagnostic subtypes with reduced sample sizes. We assessed evidence for a shared genetic basis among the 3 major subtypes: large artery atherosclerosis (LAA), cardioembolism, and small vessel disease (SVD), to inform potential cross-subtype analyses. Methods: Analyses used genome-wide summary data for 12 389 ischemic stroke cases (including 2167 LAA, 2405 cardioembolism, and 1854 SVD) and 62 004 controls from the Metastroke consortium. For 4561 cases and 7094 controls, individual-level genotype data were also available. Genetic correlations between subtypes were estimated using linear mixed models and polygenic profile scores. Meta-analysis of a combined LAA-SVD phenotype (4021 cases and 51 976 controls) was performed to identify shared risk alleles. Results: High genetic correlation was identified between LAA and SVD using linear mixed models (rg=0.96, SE=0.47, P=9×10-4) and profile scores (rg=0.72; 95% confid