The Caddoan Ceramics from the Gray\u27s Pasture Site (41HS524), Harrison County, Texas

This paper discusses the Caddoan ceramics recovered during the 1992 Northeast Texas Archeological Society Field School at the Gray\u27s Pasture site (41HS524) on Clark\u27s Creek, a few miles south of Hallsville, Texas and about 2 miles from the Sabine River floodplain. During the course of the excavations, an extensive Caddoan settlement was documented on a series of knolls on a broad terrace landform overlooking the Clark\u27s Creek floodplain, and each of those areas contains Caddoan ceramics. Most notably, a dense concentration of Caddoan ceramics, as well as two burials with whole ceramic vessels, was encountered in the northwestern part of the site, and the majority of the ceramics are from this area. The four site areas include Areal (Unit 1) on a knoll at the northeastern part of the site, Area II on the terrace at the far eastern end of the site (Units 3 and 7), Area lll on the crest of the landform in the central and southwestern part of the site (Units 2, 5, and 6), and Area IV in the northwestern part of the site (Units 8, 8X, 10-16). Unit 4 belongs in Area III, and contained a number of sherds, but these artifacts are missing, except for one plain sherd. Unit 9, in the southeastern part of the site only had a few plain sherds. A total of 2352 sherds and four vessels comprise the Caddoan ceramic assemblage from Gray\u27s Pasture. This includes 1740 plain body and base sherds, 61 plain rims, and 551 decorated rim and body sherds. About 81% of the sherds are from ArealV, with 9.3% of the sherds from Area III. There are 71 decorated rim sherds and 480 decorated body sherds (not including 11 red slipped sherds). The plain/decorated sherd ratio is 3.27 for the site as a whole, and ranges from 3.21 to 3.69 by site area. This is consistent with other pre-A.D. 1200 Caddoan sites in the Red, middle Sabine, and Neches-Angelina river basins, where such sites have plain/decorated sherd ratios that range between 2.97-4.80. Thirteenth and 14th century sites in these areas have plain/decorated sherd ratios of 1.30- 1.61, and Late Caddoan sites dating between ca. A.D. 1450--1650 have ratios of 0.56- 1.03. Through time, more Caddoan vessels are decorated, and vessels are more completely covered with decoration, rather than having the decoration confined primarily to the rim

Caddoan Archaeology in the Little Cypress Creek Valley: Recent Investigation at the Griffin Mound Site (41UR142), Upshur County, Texas

As part of the long-term study of the prehistoric archaeology of the Caddo peoples in Northeast Texas, we are currently focusing our investigations on the Little Cypress Creek valley in Upshur County. Although poorly known archaeologically, background research conducted to date, discussions with landowners, and selected survey-limited testing efforts over the last few years indicates that there are extensive Archaic and Caddoan archaeological remains preserved in the Little Cypress Creek valley. Caddoan period archaeologi cal sites (ca. A.O. 800-1600) are particularly common. The investigations of one of the more significant Caddoan sites found to date in the valley, the Griffin Mound site (41UR142), is the subject of this paper

Radiocarbon and Oxidizable Carbon Ratio Dates From the Camp Joy Mound (41UR144) in Northeast Texas

The Camp Joy Mound (41UR144) is a looted Caddo mound on property owned by the U.S. Anny Corps of Engineers, Fort Worth District, at Lake o\u27 the Pines. Although only a small number of artifacts have been found in the mound deposits - principally a few brushed sherds - it appears to be a Late Caddoan period construction with two mound platforms, separated by extensive charcoal lenses from one ( or more) burned Caddoan structure e~posed in a larger looters trench. To ascertain the age of the burned Caddoan structure that stood on the main mound platform, we obtained two charcoal samples and two oxidizable carbon ratio (OCR) samples of sediments from the charcoal lens in our freshly cleaned profile of the trench cutting across the mound

Computationally efficient methods for solving time-variable-order time-space fractional reaction-diffusion equation

Fractional differential equations are becoming more widely accepted as a powerful tool in modelling anomalous diffusion, which is exhibited by various materials and processes. Recently, researchers have suggested that rather than using constant order fractional operators, some processes are more accurately modelled using fractional orders that vary with time and/or space. In this paper we develop computationally efficient techniques for solving time-variable-order time-space fractional reaction-diffusion equations (tsfrde) using the finite difference scheme. We adopt the Coimbra variable order time fractional operator and variable order fractional Laplacian operator in space where both orders are functions of time. Because the fractional operator is nonlocal, it is challenging to efficiently deal with its long range dependence when using classical numerical techniques to solve such equations. The novelty of our method is that the numerical solution of the time-variable-order tsfrde is written in terms of a matrix function vector product at each time step. This product is approximated efficiently by the Lanczos method, which is a powerful iterative technique for approximating the action of a matrix function by projecting onto a Krylov subspace. Furthermore an adaptive preconditioner is constructed that dramatically reduces the size of the required Krylov subspaces and hence the overall computational cost. Numerical examples, including the variable-order fractional Fisher equation, are presented to demonstrate the accuracy and efficiency of the approach

Working Paper 118 - Assessment of the Trade Finance Market in Africa Post-Crisis

The financial crisis, which began to hit the trade finance markets in 2008, caused a sharp slow-down in trade in 2008 and 2009. The tightening of global credit reduced capital inflows and curtailed the availability of trade finance. This sudden shortage of trade finance negatively impacted African economies. In response, the African Development Bank (AfDB) established, on March 2009, a multiphase USD 1 billion Trade Finance Initiative (TFI). As part of the Trade Finance Initiative, AfDB commissioned a trade finance survey conducted three times between 2009 and 2010. The financial institutions contacted during these market surveys are listed at the end of this document. During this research, banks in Senegal, Burkina Faso, Ghana, Nigeria, Egypt, Morocco, Kenya, South Africa, Tanzania and Rwanda were contacted. In addition, financial institutions active in the international and regional trade finance markets based in the USA, UK, France, Germany and the Netherlands were contacted. Finally, development finance institutions active in supporting trade both within Africa and without were interviewed. Generally trade operations officers, international department management, treasury officers or senior commercial bankers were contacted. Participants were asked to: • Describe their trade finance related activities • Describe the state of the market for trade finance products • Describe how availability of facilities has changed •Describe how terms and conditions of facilities have changed •Discuss overall economic activity in their markets • Discuss potential roles for AfDB to play to facilitate access to trade finance The overall conclusions of these surveys are: • African trade grew rapidly during the pre-crisis period, spurred by growing south-south trade and the emergence of Asia as a major purchaser of African raw materials and primary products. Anecdotally, it appears that trade finance was increasingly available during this period. • The crisis has had a negative impact on African trade due to falling demand for African primary product exports. Trade finance availability was sharply constrained during the initial crisis period. • It is difficult to discern real trends in African trade finance as markets remain highly volatile. Liquidity and risk appetite vary widely across markets and counterparties. Across all markets, trade finance tenors have shortened. • There is an overall decrease in demand for trade products due to decreased economic activity but a higher proportion of the current transactions are using trade instruments. • International commercial banks that historically provided confirmation lines for trade instruments remain risk averse and seek to maintain/increase returns. • Low income countries and the smaller Regional Member Countries are hit hardest by the lack of availability of trade finance due to higher perceived risk, even for low risk transactions. • Basel II related capital allocation rules will have a negative impact on the cost and availability of trade finance across the continent. • Multilateral Development Banks in other regions play a variety of roles to support trade finance availability, from which AfDB could learn some lessons. • The African Development Bank can have a significant impact on trade finance availability and, consequently, RMC economic performance over the short/medium term.

Towards best practices for preaching in the digital age : updating preaching practices in East Texas

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Historical Calibration of a Water Account System

Models that are used for future based scenarios should be calibrated with historical water supply and use data. Historical water records in Australia are discontinuous, incomplete and often incongruently disaggregated. We present a systematic method to produce a coherent reconstruction of the historical provision and consumption of water in Victorian catchments. This is demonstrated using WAS: an accounting and simulation tool that tracks the stocks and flows of physical quantities relating to the water system. The WAS is also part of, and informed by, an integrated framework of stocks and flows calculators for simulating long-term interactions between other sectors of the physical economy. Both the WAS and related frameworks consider a wide scope of inputs regarding population, land use, energy and water. The physical history of the water sector is reconstructed by integrating water data with these information sources using a data modelling process that resolves conflicts and deduces missing information. The WAS allows strategic exploration of water and energy implications of scenarios of water sourcing, treatment, delivery and end use cognisant of historical records.water accounting, stocks and flows, historical time series, data modelling, calibration

Development of a stereo 3-D pictorial primary flight display

Computer-generated displays are becoming increasingly popular in aerospace applications. The use of stereo 3-D technology provides an opportunity to present depth perceptions which otherwise might be lacking. In addition, the third dimension could also be used as an additional dimension along which information can be encoded. Historically, the stereo 3-D displays have been used in entertainment, in experimental facilities, and in the handling of hazardous waste. In the last example, the source of the stereo images generally has been remotely controlled television camera pairs. The development of a stereo 3-D pictorial primary flight display used in a flight simulation environment is described. The applicability of stereo 3-D displays for aerospace crew stations to meet the anticipated needs for 2000 to 2020 time frame is investigated. Although, the actual equipment that could be used in an aerospace vehicle is not currently available, the lab research is necessary to determine where stereo 3-D enhances the display of information and how the displays should be formatted

A Water Accounting System for Strategic Water Management

This paper describes a water accounting system (WAS) that has been developed as an innovative new tool for strategic long-term water management. The WAS incorporates both disaggregated water use and availability, provides a comprehensive and consistent historical database, and can integrate climate and hydrological model outputs for the exploration of scenarios. It has been established and tested for the state of Victoria in Australia, and can be extended to cover other or all regions of Australia. The WAS is implemented using stock-and-flow dynamics, currently employing major river basins as the spatial units and a yearly time step. While this system shares features with system dynamics, learning is enhanced and strategic management of water resources is improved by application of a Design Approach and the structure of the WAS. We compare the WAS with other relevant accounting systems and outline its benefits, particularly the potential for resolving tensions between water supply and demand. Integrated management is facilitated by combination with other stocks and flows frameworks that provide data on key drivers such as demography, land-use and electricity production.water accounts, stocks and flows, water budgets, decision support systems, strategic management