Finite-volume scheme for transonic potential flow about airfoils and bodies in an arbitrarily shaped channel

A conservative finite-volume difference scheme is developed for the potential equation to solve transonic flow about airfoils and bodies in an arbitrarily shaped channel. The scheme employs a mesh which is a nearly conformal O mesh about the airfoil and nearly orthogonal at the channel walls. The mesh extends to infinity upstream and downstream, where the mapping is singular. Special procedures are required to treat the singularities at infinity, including computation of the metrics near those points. Channels with exit areas different from inlet areas are solved; a body with a sting mount is an example of such a case

Exploring 1670 Charles Towne: 38CH1A/B, Final Archaeology Report

The Charles Towne Archaeological Project of 2000/2001 was designed to discover evidence for the remains of the 1670 Charles Towne settlement. The investigation first used a sampling method called shovel testing to locate concentrations of seventeenth-century artifacts in the northernmost portion of the fortified area of the settlement. Once located, the project began to open a larger block of excavation in the vicinity of this concentration. This, the first of two excavation blocks, ultimately included 65 ten-foot squares and the excavation of hundreds of features. This strategy led to the discovery of an earthfast lodging , which was bordered by a concentration of seventeenth-century artifacts. The second block of excavation extended the original block by 63 ten-foot squares to include the full extent of the seventeenth-century artifact area of concentration. This project not only demonstrated the use of standard methodological techniques used in historical archaeology but also provided a learning environment for community volunteers and an educational opportunity for local schools.https://scholarcommons.sc.edu/archanth_books/1231/thumbnail.jp

The Sullivan Tabby Point Ruin: Callawassie Island, South Carolina

https://scholarcommons.sc.edu/archanth_books/1239/thumbnail.jp

Root Growth Potential and Field Survival of Container Loblolly Pine Seedlings Fall Fertilized with Nitrogen

Two studies investigated the effects of fall nitrogen fertilizer applications on the root growth potential (RGP) and field performance of container loblolly pine seedlings (Pinus taeda L.). The seedlings were sampled at 4 chilling levels ranging from 100 to 550 hours (0 to 8\u27 C). Seedlings propagated for the first study may have had a hidden nutrient deficiency and therefore the fall diammonium phosphate (DAP) application at rates of 202 kg N/ha and 67 kg N/ha increased RGP 43% and 32%, respectively. The growing season mineral fertilizer application rate was increased in the second study which may explain why nitrogen applications at 202 kg N fall/ha did not increase RGP. In general, RGP increased as exposure to chilling hours increased. Fall fertilization increased total seedling weight. Analysis of covariance indicated that RGP may be a function of total seedling weight and not a direct response to fertilizer treatment or chilling level. For the first study, survival was not significantly affected by the fall DAP treatments

Effects of Fall Fertilizer Applications of Mitotic Index and Bud Dormancy of Loblolly Pine Seedlings

A series of studies examined the effects of fall fertilization with diammoniwn phosphate (DAP) on mitotic index and bud donnancy [as measured by mean days to budbreak (DBB)] of two half-sib seed sources of loblolly pine. The first study tested different rates of DAP (0, 67, and 202 kg Nlha), the second study compared DAP with ammoniwnnitrate, and the third study examined the effect of different application dates (September 28, October 19, and November 9). An increase in mitotic index of unfertilized seedlings was observed during October and was due to developmental activity which follows initial budset. Differences in mitotic index were observed between families in all three studies.Overall, the Georgia family has a higher mitotic index, but in one study, the Virginia family had higher values in the spring. Both families tended to reach a minimum level of mitotic index at the same time (mid- to late December). However, the Virginia family reached maximum rest (as measured by days to bud break) about 1 to 2 weeks prior to the Georgia family. Fertilization with DAP in the fall (after bud set in September) did not delay the progression of the bud dormancy cycle as measured by days to bud break in a greenhouse. The overall effect of fall fertilization on increasing the mitotic index was temporary and only lasted for about three weeks after fertilization. These findings indicated that a direct relationship may not exist between the bud dormancy cycle and mitotic index

Soybean aphid in South Dakota

Originating text in English.Citation: Catangui, Michael A., South Dakota State University. Cooperative Extension Service. (2002). Soybean aphid in South Dakota. South Dakota State University, College of Agriculture & Biological Sciences, Cooperative Extension Service, 914, 4-4