CONJOINT ANALYSIS OF DEER HUNTING

This paper develops a logit-based conjoint analysis of willingness to pay for individual attributes of deer-hunting trips. Since deer-hunting success is uncertain, willingness to pay for enhanced likelihood of bagging a deer, rather than for certain success, is evaluated. Implicit costs of recreational travel time are also evaluated from hypothetical trade-offs between travel time and trip expenditures. The valuation of travel time derived here appears to reflect more the opportunity cost of foregone hunting than the opportunity cost of foregone work. This implies that travel-cost analyses of recreational demand, which impute costs of recreational travel solely from wage data, can yield biased valuations of recreational amenities.Resource /Energy Economics and Policy,

A discontinuous Galerkin moving mesh method for Hamilton-Jacobi equations

In this paper we consider the numerical solution of first-order Hamilton-Jacobi equations using the combination of a discontinuous Galerkin finite element method and an adaptive $r$-refinement (mesh movement) strategy. Particular attention is given to the choice of an appropriate adaptivity criterion when the solution becomes discontinuous. Numerical examples in one and two dimensions are presented to demonstrate the effectiveness of the adaptive procedure

A moving mesh method for one-dimensional hyperbolic conservation laws

We develop an adaptive method for solving one-dimensional systems of hyperbolic conservation laws that employs a high resolution Godunov-type scheme for the physical equations, in conjunction with a moving mesh PDE governing the motion of the spatial grid points. Many other moving mesh methods developed to solve hyperbolic problems use a fully implicit discretization for the coupled solution-mesh equations, and so suffer from a significant degree of numerical stiffness. We employ a semi-implicit approach that couples the moving mesh equation to an efficient, explicit solver for the physical PDE, with the resulting scheme behaving in practice as a two-step predictor-corrector method. In comparison with computations on a fixed, uniform mesh, our method exhibits more accurate resolution of discontinuities for a similar level of computational work

A HOUSEHOLD PRODUCTION ANALYSIS OF FUELWOOD DEMAND IN RHODE ISLAND

A model analyzing household substitution of fuelwood for other heating fuels is needed to clarify the relationship between energy prices and patterns of forest resource utilization. This paper employs the household production methodology to model fuelwood demand in Rhode Island. Data from a cross-sectional survey of 515 households are employed to test a discrete-choice model of household participation in wood-burning and a four-equation system modeling household production of heat and aesthetic benefits from fuelwood and stove capital. Control of selection bias via inclusion of an appropriate instrument allows analysis of aggregate demands. Some broad policy prescriptions applicable to the Northeast generally are presented.Resource /Energy Economics and Policy,

Photo-reactions in the solid state : titanium dioxide and related systems

1. The photo -sensitising oxides have been shown to exhibit a 'fixation' of gaseous oxygen on illumination with near U -V light. This reaction was found to be specific for oxygen among the gases investigated.2. The method developed for the study of the photo - oxidation of plant pigments on thallous bromide has been found to be unsuitable to the study of the photo- oxidation of Chlorazol Sky Blue and Malachite Green adsorbed on various sensitising oxides.3. The correlation between the sensitising activity of the various oxides and the various samples of TiO2 and their power of oxygen 'fixation' has been demonstrated over a wide range.4.The reaction with TiO₂ has been shown independent of the presence of various impurities. No bulk stoichiometric oxide was formed as a final product.5. The production of a short-life highly-active oxidising agent has been demonstrated but no evidence of hydrogen peroxide was found when considering Ti0₂.6. Various physical parameters of the reaction between oxygen and titanium dioxide were investigated. They indicated that it was not a pure photo -chemical reaction.7. Zinc oxide was shown to behave in a manner similar to that exhibited by TiO₂ with the exception of the production of H₂0₂ in the presence of water.8. The fading of Chlorazol Sky Blue, adsorbed on the oxides, was demonstrated to be an oxidation reaction occurring in vacuo and in oxygen. In the former case, however, the reaction ceased long before complet ion of total fading. The type of reaction exhibited by Lialachite Green oxalate, adsorbed on Ti0₂, appeared to differ from that reported for the same dye sensitised by TlBr.9. General reaction schemes have been proposed to account for the main features of the photo- fixation of the gaseous oxygen and subsequently the photosensitising effects of the various oxides.10. The rapid oxygen uptake by various samples of as Ti0₂ on illumination is proposed an analytical method of determining small quantities of that gas contained in inert atmospheres

Irruption: Placing Theology at the Centre of the Discourse on Church Amalgamation

When church attendance declines, congregational amalgamation is often looked to as a solution. To that end, institutional church bodies responsible for ecclesiastical governance offer guidance literature as a means of shepherding congregations through this complex process. As it currently exists, however, such guidance literature on how to proceed with amalgamation focuses on practical matters, and neglects a theological dimension. The aim of this paper is to highlight this paucity of theological foundation in matters of church amalgamation, and posits that this engenders sub-optimal conditions for successful congregational amalgamation outcomes. It looks primarily to Friedrich Schleiermacher for theological insights that may be useful in times of turbulent transition. As one mechanism of cultural development in contemporary times, faith based institutions should engage with theological ideas and discourse deliberatively and explicitly as a foundation for exploration of such issues as identity and community formation

The Njanja iron industry: the decline of pre-colonial enterprise

A Historical Seminar paper on the pre-colonial iron smelting industry of Southern Rhodesia's Mashona-land region.Nineteenth century travelers in Mashonaland were unfortunately obsessed with either gold or hunting.: In their pursuit of gold and game they missed or ignored perhaps the principal industry of several peoples of the area, iron mining, smelting} and manufacture, Those who did observe it failed to recognize its full economic significance but they invariably connected it with the traditional political hierarchy, . In W. Montagu. Kerr’s The Far Interior, there is;an account of forging of assegais by an iron smith who was also a. chief. Kerr unfortunately, did not see the smelting process, and the forging was not clone in its traditional place, but.on.the march. Still he closely links the chief’s two functions and describes the respect the old man received as being derived as much from his iron expertise as from his political authority. A,R,. Sawyer in The Gold-fields of Mashonaland described .Shona smelting techniques and provided excellent diagrams of a Shona furnace, but he did not place iron working in its societal context