Construction of multi-instantons in eight dimensions

We consider an eight-dimensional local octonionic theory with the seven-sphere playing the role of the gauge group. Duality conditions for two- and four-forms in eight dimensions are related. Dual fields--octonionic instantons--solve an 8D generalization of the Yang-Mills equation. Modifying the ADHM construction of 4D instantons, we find general $k$-instanton 8D solutions which depends on $16k-7$ effective parameters

THE WTO DOHA DEVELOPMENT ROUND AND OECD AGRICULTURAL POLICY

A global CGE model featuring agricultural sector detail is used to assess WTO agricultural reform. Parametric uncertainty is considered with model results evaluated based on confidence intervals. We find that continued shift in domestic support to green box payments maintains farmer welfare while providing significant welfare gains to developing regions.International Relations/Trade,

The Poverty Impacts of Global Commodity Trade Liberalization

This paper examines the poverty impacts of global merchandise trade reform by looking at a wide range of developing countries in Africa, Asia and Latin America. Overall, we find that trade reform tends to reduce poverty primarily through the inclusion of agricultural components. The majority of our developing country sample experiences small poverty increases from non-agricultural reforms. We explore the relative poverty-friendliness of agricultural trade reforms in detail, examining the differential impacts on real after-tax factor returns of agricultural versus non-agricultural reforms. This analysis is extended to the distribution of households by looking at stratum-specific poverty changes. Our findings indicate that the more favorable impacts of agricultural reforms are driven by increased returns to peasant farm households’ labor as well as higher returns for unskilled wage labor. Finally, we examine the commodity-specific poverty impacts of trade reform for this sample of countries. We find that liberalization of food grains and other processed foods represent the largest contributions to poverty reduction. More specifically, it is tariff reform in these commodity markets that dominates the poverty increasing impacts of wealthy country subsidy removal.Distorted incentives, agricultural and trade policy reforms, national agricultural development, Agricultural and Food Policy, International Relations/Trade, F13, F14, Q17, Q18,

EVALUATING THE IMPACTS OF AGRICULTURAL EXPORTS ON A REGIONAL ECONOMY

Agricultural exports are important to many regional economies, as is the case for agricultural exports wither produced in or shipped through Louisiana. A hybrid (revised and verified) IMPLAN model of the Louisiana economy is used to estimate the direct and indirect impact of agricultural exports. Original model estimates of foreign exports lacked holistic (overall) accuracy. However, other, more general uses of the model were unaffected by this lack of accuracy. While the contributions of agricultural exports to the state economy were substantial, impacts were concentrated in unprocessed products. Increasing the export of processed agricultural products should enhance economic activity.Agricultural exports, Holistic accuracy, IMPLAN, Input-output models, Processed exports, Community/Rural/Urban Development, International Relations/Trade,

Results of experiments to simulate radiant heating of propellant in a nuclear light bulb engine using a D-C arc radiant energy source

Simulating radiant heating of propellant stream of nuclear light bulb engin

Polyfolds: A First and Second Look

Polyfold theory was developed by Hofer-Wysocki-Zehnder by finding commonalities in the analytic framework for a variety of geometric elliptic PDEs, in particular moduli spaces of pseudoholomorphic curves. It aims to systematically address the common difficulties of compactification and transversality with a new notion of smoothness on Banach spaces, new local models for differential geometry, and a nonlinear Fredholm theory in the new context. We shine meta-mathematical light on the bigger picture and core ideas of this theory. In addition, we compiled and condensed the core definitions and theorems of polyfold theory into a streamlined exposition, and outline their application at the example of Morse theory.Comment: 62 pages, 2 figures. Example 2.1.3 has been modified. Final version, to appear in the EMS Surv. Math. Sc