NASTRAN maintenance and enhancement experiences

The current capability is described which includes isoparametric elements, optimization of grid point sequencing, and eigenvalue routine. Overlay and coding errors were corrected for cyclic symmetry, transient response, and differential stiffness rigid formats. Error corrections and program enhancements are discussed along with developments scheduled for the current year and a brief description of analyses being performed using the program

DO DEVELOPED EXPORTING COUNTRIES CONTRIBUTE TO FOOD SECURITY? THE CASE OF THE EC

Food Security and Poverty,

THE ECONOMIC IMPLICATIONS OF CHEMICAL USE RESTRICTIONS IN AGRICULTURE

Agricultural and Food Policy, Crop Production/Industries,

Production Response to Increased Imports: The Case of U.S. Sugar

This paper considers how the welfare of U.S. sugar producers can be affected by the use of production controls in the presence of rising sugar imports and falling sugar prices, taking into account the negative externalities associated with U.S. sugar production. Even if production controls are used, producer welfare can be affected negatively under rising imports.import quota, production quota, supply management, U.S. sugar, Agribusiness, Agricultural and Food Policy, Crop Production/Industries, International Relations/Trade, Production Economics, Productivity Analysis, F13, F14, Q17,

Preference erosion effects on the agricultural sector of the EU’s Mediterranean Partner Countries

This paper analyses preference erosion effects on the agricultural sector of the EU’s Mediterranean Partner Countries (MPCs) with the partial equilibrium multi-commodity multi-region world trade model AGRISIM. Supposing that the preferences to the MPCs granted by the EU remain as of 2001 then the effects are evident for high protected markets like beef in Turkey, milk and rice in Morocco and olive oil in the MPCs. Supposing a free trade area between the EU and the MPCs, then the impacts are high for beef, milk and sugar. The farmers’ income decreases, but the consumers and the taxpayers benefit from lower prices and the overall welfare in all MPCs increases.preference erosion, multilateral liberalisation, Mediterranean Partner Countries, AGRISIM, Agricultural and Food Policy, Q17, Q18, Q13,

MINIVER upgrade for the AVID system. Volume 2: LANMIN input guide

In order to effectively incorporate MINIVER into the AVID system, several changes to MINIVER were made. The thermal conduction options in MINIVER were removed and a new Explicit Interactive Thermal Structures (EXITS) code was developed. Many upgrades to the MINIVER code were made and a new Langley version of MINIVER called LANMIN was created. A user input guide for LANMIN is provided

Application of the CINGEN program a thermal network data generator

The application of the CINGEN computer program and two of its supporting programs for the evaluation of structural and thermal performance of physical systems was described. The CINGEN program was written and implemented to avoid the duplication effort of performing a finite element approach for structural analysis and a finite differencing technique for thermal analysis, as well as the desire for a geometrical representation of the thermal model to reduce modeling errors. The program simplifies the thermal modeling process by performing all of the capacitance and conductance calculations normally done by the analyst. Each solid element is divided into five tetrahedrons, allowing the total volume to be calculated precisely. A sample problem was illustrated

THE REAL RATE OF PROTECTION: THE STABILIZING EFFECT OF PRICE POLICIES AND DIRECT PAYMENTS

Traditional indicators of protection refer to the level effect of price policies on income and ignore the stabilizing effect. We derive a measure of the real rate of protection which incorporates these dual dimensions. The income stabilizing effects of price policy protection lead to a greater level of real protection than would be measured conventionally. Computed real protection rates for the European Union wheat market over the pre- and post-MacSharry reform periods were found to be some 3-5 percent greater than traditional indicators. Moreover, the compensatory payments to farmers following the 1992 reforms had a major risk reducing impact.International Relations/Trade,

Using the Ricardian Technique to estimate the impacts of climate change on Crop Farming in Pakistan

This study uses the Ricardian valuation technique to estimate the effect of climate change on the crop farming sector in Pakistan. As a main contribution this paper uses a large household level dataset comprising 3336 farming entities to analyze long-term climate impacts on farm net crop revenues. In particular temperature increases in key growing seasons can be harmful. Annual losses for crop farming ranging from 100-200US$can be expected. Given an average crop net income of 450US$ per hectare, these impacts can be devastating for farmers. The climate impacts will vary across geographic regions. Temperature is found to be the detrimental factor for farming in Pakistan. Precipitation changes seem to have a rather negligible effect.Crop Production/Industries, Environmental Economics and Policy,