Kinetic studies of the dissolution of copper in ferric chloride solutions

M.S.Walter H. Burrow

From Mounds to Monasteries: A Look at Spiro and Other Centers Through The Use of Metaphor

Previous study of the extensive and elaborate funerary offerings at the Spiro site have explained their presence by an exchange system with Spiro functioning as a gateway center. More recently, Schambach has argued extensively and passionately for Spiro’s role as an entrepôt redistributive center. However, this argument fails to account for much of the accumulation of funerary items present at Spiro. As an alternative, I propose that some ceremonial centers such as Spiro functioned solely as religious centers, much like the monasteries of medieval Europe with parallels in the use of architecture, economic support, relics, and the treatment of individuals at death. A model based on the metaphor of monastic life provides greater explanatory potential than that of the economically-driven entepôt

An Aggregate of Spear Points from Atoka County, Oklahoma

Nine spear points were reported from a farm in northwestern Atoka County, Oklahoma. This aggregate of points appeared to bean isolate as no other prehistoric material was found in the vicinity. The following study discusses the setting and nature of the specimens, stylistic attributes of the spear points and their age, technological and functional characteristics of the pieces, and whether these items represent caching behavior

Book Review: Archeology in the Eastern Planning Region, Texas: A Planning Document

With the passage of the National Historic Preservation Act in 1966 and ensuing regulatory guidelines, a mandate for the development of The State Historic Preservation Plan was clearly established. During the late 1960s and the 1970s, because of limited funding and the absence of information on the structure of these plans, few states had formulated plans or if they had state plans, they were of an extremely general nature. In the 1980s, principally through funding initiatives on the part of the National Park Service and through the efforts of NPS preservation planners such as John Knoerl, many states began their first attempts at comprehensive preservation planning. One of the more highly acclaimed of these early planning documents was the Resource Protection Planning Process for Texas. The current eastern planning region document represents the culmination of over 10 years of preservation planning in the state of Texas

Random Construction of Riemann Surfaces

In this paper, we address the following question: What does a typical compact Riemann surface of large genus look like geometrically? We do so by constructing compact Riemann surfaces from oriented 3-regular graphs. The set for such Riemann surfaces is dense in the space of all compact Riemann surfaces, namely Belyi surfaces. And in this construction we can control the geometry of the compact Riemann surface by the geometry of the graph. We show that almost all such surfaces have large first eigenvalue and large Cheeger constant

Isoscattering on surfaces

We give a number of examples of pairs of non-compact surfaces which are isoscattering, and which are exceptionally simple in one or more senses. We give examples which are of small genus with a small number of ends, and also examles which are congruence surfaces.Comment: 21 page

An Analysis of Watermove Water Markets

This paper conducts an analysis of the water markets in Victoria covered by Watermove. The analysis in this paper examines the weekly trading activity across trading zones. For the majority of trading zones there is little trading activity that occurs. There are three trading zones in which the markets for temporary water rights are reasonably active and liquid on a weekly basis, and for these zones an analysis is conducted of their demand and supply elasticities and consumer and producer surplus. The results of this analysis suggest a stronger relationship on the supply side between prices, volumes, elasticity and producer surplus.Water, Water markets, Elasticities, Consumer and Producer Surplus

R&D, Agency Costs and Capital Structure: International Evidence

We examine the impact of R&D intensity and agency costs on the value of firms across 13 economies. We find that R&D adds value while high agency costs reduce value. R&D adds value, however, even when agency costs are high. We show that in those firms where agency costs are high and R&D intensity is high the debt control hypothesis is at work. In contrast to the stylised fact of high R&D firms having low levels of debt, these firms have higher levels of debR&D, Agency Costs, Capital Structure

Fluid mechanics of waste water disposal in the ocean

Outfall pipes into the ocean are analogous to chimneys in the atmosphere: they are each intended for returning contaminated fluids to the environment in a way that promotes adequate transport and dispersion of the waste fluids. A waste-water treatment plant and an adjoining outfall constitute a system for environmental control; it is practically never feasible to provide such complete treatment that an outfall is not necessary, nor is it common to depend entirely on an outfall with no treatment. Although outfalls and chimneys are functionally similar, there are important differences in their relationships to the coastal waters and atmosphere respectively. Urban and industrial areas, generating waste water, are located along the shallow edge of the ocean, with often tens or even hundreds of kilometers of continental shelf between the shoreline and the deep ocean. The bottom slope on the shelf is typically less than one percent. Thus outfalls extending several kilometers offshore discharge into a body of water of large lateral extent compared to the depth, and are still remote from the main body of ocean water. In contrast, most atmospheric contaminants are introduced at the base of the atmosphere and circulate throughout the whole atmosphere much more readily. Vertical convection mixes the troposphere rapidly in most places and the wind systems circulate the air around the globe in a matter of weeks. Outfalls and chimneys are useful in reducing pollutant concentrations only locally. Far away from the sources, it makes little difference how the pollutants are discharged. The decay times of the pollutants are important in the choice of effective discharge strategies. For example, the problems of very persistent contaminants such as DDT cannot be alleviated by dispersion from an outfall; such pollutants must be intercepted at the source and prevented from entering the environment. On the other hand, degradable organic wastes, as in domestic sewage, may be effectively disposed of through a good ocean outfall. Since the decay time is only a few days, potential problems are only local, and not regional or global

An Inflated Ordered Probit Model of Monetary Policy: Evidence from MPC Voting Data

Even in the face of a continuously changing economic environment, interest rates often remain unadjusted for long periods. When rates are moved, the norm is for a series of small unidirectional discrete basis-point changes. To explain these phenomena we suggest a two-equation system combining a “long-run” equation explaining a binary decision to change or not change the interest-rate, and a “shortrun” one based on a simple monetary policy rule. We account for unobserved heterogeneity in both equations, applying the model to unique unit-record level data on the voting preferences of Bank of England Monetary Policy Committee (MPC) members.Interest rates; voting; discrete data; ordered models; inflated outcomes; monetary policy committee