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Following the recognition of the importance of dealing with the effects of genotype-by-environment (G ×E) interaction in multi-environment testing of genotypes in plant breeding programs, there has been substantial development in the area of analytical methodology to quantify and describe these interactions. Three major areas where there have been(More)
As pulse detonation engine development matures, it becomes increasingly important to consider how practical details such as the implementation of valves and nozzles will affect performance. Inlet valve timing and valveless inlet designs may result in flow of products back upstream and, consequently, reduction in impulse over the ideal case. Although proper(More)
Response We used the polytropic approximation P ∼ ρ γ to model the isentrope in the detonation products in our original study 1 in order to simplify the computation and develop analytic formulas for the impulse. Radulescu and Hanson (R&H) point out that for the stoichiometric ethylene-oxygen case, an equilibrium approximation to the isentrope is more(More)
Figure 4. Block diagram of experimental setup Figure 5. Ionization probe circuit Figure 6. Mechanical drawing of front wall end cap (units in inches) Figure 7. Ballistic pendulum arrangement for the initial and fully deflected positions Figure 8. Components of blockage plate obstacles (units in inches) Figure 9. Blockage plate obstacle configuration Figure(More)
An investigation was conducted to evaluate the impact of experimental designs and spatial analyses (single-trial models) of the response to selection for grain yield in the northern grains region of Australia (Queensland and northern New South Wales). Two sets of multi-environment experiments were considered. One set, based on 33 trials conducted from 1994(More)
Under rainfall conditions, aggregates may suffer breakdown by different mechanisms. Slaking is a very efficient breakdown mechanism. However, its occurrence under rainfall conditions has not been demonstrated. Therefore, the aim of this study was to evaluate the occurrence of slaking under rain. Two soils with silt loam (SL) and clay loam (CL) textures were(More)
Errata In the original evaluation of our analytical model for the single-cycle impulse of a pulse detonation tube, 1 we approximated the detonation product isentrope as having a frozen composition with a corresponding polytropic exponent γ f. As discussed in the accompanying comment by Radulescu and Hanson and our response, for many situations, it is more(More)
Surface crusts, formed by raindrop impact, degrade the soil surface structure causing changes in porosity. An experiment was conducted with the objective of evaluating the influence of the formation of a crusting layer on the porosity (percentage of area, shape and size) of a Haplic Acrisol under three tillage systems, and simulated rainfall. The tillage(More)
Several subjective choices must be made when classifying genotypes based on data from plant breeding trials. One choice involves the method used to weight the contribution each environment makes to the classification. A second involves the use of either genotype-means for each environment or genotypevalues for each block, i.e., considering each block to be(More)
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