Apparatus for use in the production of ribbon-shaped crystals from a silicon melt

A susceptor for facilitating induction heating of silicon melt is described. The susceptor comprises a pair of susceptor halves of a thickness less than two skin depths, each being the mirror image of the other, disposed in mutually opposed, electrically insulated relation. The crucible comprises a quartz body supported by the graphite susceptor, whereby the R-F coil is electrically coupled with the melt

Means for growing ribbon crystals without subjecting the crystals to thermal shock-induced strains

A susceptor particularly suited for use in growing a ribbon crystal employing edge defined film fed growth techniques is described. The susceptor includes a die through which a melt is drawn for forming a crystal ribbon. This is combined with a coolant delivery system characterized by a pair of jets for directing a stream of fluid coolant along a path extended to impinge on the susceptor in close proximity with the die in nonincident relation with the crystal being grown

Redbanded stink bug, Piezodorus guildinii (Westwood): pest status, control strategies, and management in Louisiana soybean

The redbanded stink bug, Piezodorus guildinii (Westwood), was identified as a pest of Louisiana soybean during 2000. Currently, this species has become established throughout Louisiana and into the soybean production regions of bordering states. Seasonal abundance, patterns of oviposition, and population dynamics of this species were surveyed in soybean during 2008-10. The redbanded stink bug comprised the largest percentage (54%) of the total stink bug complex collected at five survey sites followed by the southern green (27%), Nezara viridula L. and brown (7%) stink bugs, Euschistus servus L. Peak oviposition occurred during the (R5) soybean growth stage. Most (80%) egg clusters were observed on leaves and pods in the lower two-thirds of the soybean plant canopy. Additional field experiments evaluated redbanded stink bug effects on soybean seed yield, as well as susceptibility to selected insecticides. Both native and artificial infestations of redbanded stink bug significantly reduced yield and seed quality, and increased incidence of delayed crop maturity at population levels below the Louisiana recommended action threshold of nine insects per 25 sweeps. Native populations reduced yields up to 55% in the non-insecticide treated control plots. Yield losses (4.7 to 14.1%), stink bug damaged seed (4.1 to 8.1%), and incidence of green stems (4.7 to 32.3%) from artificial infestations occurred during the R4, R5, and R6 growth stages at infestations of 0.5-1 insect/0.3 row m. No significant effects were detected for yield, stink bug damaged seed, or incidence of green stem with infestations at the R7 growth stage. Populations of redbanded stink bug collected from Louisiana soybean fields were less susceptible to neonicotinoid, organophsphate, and pyrethroid insecticides compared to the southern green stink bug in field and laboratory tests. The occurrence of redbanded stink bug in Louisiana soybean has altered pest management strategies and increased production costs that are now necessary to reduce yield and quality losses

Programmed schedule holds for improving launch vehicle holds

Baseline definition and system optimization are used for the analysis of programmed holds developed through prelaunch system analysis. Identification of design specifications for ground support equipment and maintenance concepts, and design specifications are used to describe the functional utilization of the overall flow process

Finite-Time Singularity Signature of Hyperinflation

We present a novel analysis extending the recent work of Mizuno et al. [2002] on the hyperinflations of Germany (1920/1/1-1923/11/1), Hungary (1945/4/30-1946/7/15), Brazil (1969-1994), Israel (1969-1985), Nicaragua (1969-1991), Peru (1969-1990) and Bolivia (1969-1985). On the basis of a generalization of Cagan's model of inflation based on the mechanism of ``inflationary expectation'' or positive feedbacks between realized growth rate and people's expected growth rate, we find that hyperinflations can be characterized by a power law singularity culminating at a critical time $t_c$. Mizuno et al.'s double-exponential function can be seen as a discrete time-step approximation of our more general nonlinear ODE formulation of the price dynamics which exhibits a finite-time singular behavior. This extension of Cagan's model, which makes natural the appearance of a critical time $t_c$, has the advantage of providing a well-defined end of the clearly unsustainable hyperinflation regime. We find an excellent and reliable agreement between theory and data for Germany, Hungary, Peru and Bolivia. For Brazil, Israel and Nicaragua, the super-exponential growth seems to be already contaminated significantly by the existence of a cross-over to a stationary regime.Comment: Latex 21 pages including 2 tables and 7 eps figure

A Second-Order Finite Volume Method that Reduces Numerical Shockwave Anomalies in One Dimension

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/106462/1/AIAA2013-2699.pd