Hybrid computer techniques for solving partial differential equations

Techniques overcome equipment limitations that restrict other computer techniques in solving trivial cases. The use of curve fitting by quadratic interpolation greatly reduces required digital storage space

SOCIAL COST OF THE DAIRY PRICE SUPPORT PROGRAM

Agricultural and Food Policy,

Electrodynamics with radiation reaction

The self force of electrodynamics is derived from a scalar field. The resulting equation of motion is free of all of the problems that plague the Lorentz Abraham Dirac equation. The age-old problem of a particle in a constant field is solved and the solution has intuitive appeal.Comment: 5 page

Radiographic measurements of the trachea in domestic short haired and Persian cats

Tracheal diameter can be assessed from a thoracic radiograph, with assessment of tracheal diameter in dogs based on ratios between tracheal diameter and a skeletal measurement – however reference ranges are not available for the cat. Tracheal narrowing may cause significant clinical problems, although tracheal hypoplasia in dogs may be clinically silent, and is rarely reported in cats (both mesati- and brachycephalic). The tracheal diameter and trachea:thoracic inlet and trachea:rib ratios were calculated for populations of Domestic Short Haired (DSH) (n=68) and Persian (n=40) cats. This gave reference ranges for radiographic tracheal measurements in these breeds. It is proposed that the tracheal diameter in a normal DSH cat should be 18% of the diameter of the thoracic inlet, and compared to 20% in Persian cats

Strings in gravity with torsion

A theory of gravitation in 4D is presented with strings used in the material action in $U_4$ spacetime. It is shown that the string naturally gives rise to torsion. It is also shown that the equation of motion a string follows from the Bianchi identity, gives the identical result as the Noether conservation laws, and follows a geodesic only in the lowest order approximation. In addition, the conservation laws show that strings naturally have spin, which arises not from their motion but from their one dimensional structure.Comment: 16 page

Sustainable Prosperity and Democracy: A Research Agenda

As environmental crises, most notably climate change, become ever more severe, voices are reappearing that call for authoritarian solutions: Democracy, so the argument goes, has proven to be too slow to respond to urgent threats, and so a stronger, authoritarian hand is needed to push through the necessary socio-political changes. In this paper, we respond to this charge by revisiting the role of democracy within a transition to sustainable prosperity. We argue it is not democracy as such that is the problem, but rather democracy in its current form is itself constrained by structural and discursive forces including the almost hegemonic status of capitalist politico-economic discourses and tendencies towards shorttermism in political decision-making. Thus, instead of advocating further constraints on democracy, we explore new institutional and societal spaces that can revitalise democracy, ameliorating existing constraints and infusing sustainability politics with new ways of thinking. In particular we highlight the potential promise of participatory and deliberative innovations, prefigurative politics, reform of established structures and institutions, and deliberative systems and cultural change. The paper acts as an introduction to some of the political theory and political science aspects of the research programme of the Centre for the Understanding of Sustainable Prosperity (CUSP)

Effects of a torsion field on Big Bang nucleosynthesis

In this paper it is investigated whether torsion, which arises naturally in most theories of quantum gravity, has observable implications for the Big Bang nucleosynthesis. Torsion can lead to spin flips amongst neutrinos thus turning them into sterile neutrinos. In the early Universe they can alter the helium abundance which is tightly constrained by observations. Here I calculate to what extent torsion of the string theory type leads to a disagreement with the Big Bang nucleosynthesis predictions.Comment: accepted by General Relativity and Gravitatio