Shear buckling of specially orthotropic plates with centrally located cutouts

The shear loading of a composite rectangular plate with a centrally located circular cutout was analyzed in order to predict the buckling load of the plate. The first step in this analysis is to calculare the in-plane stress distribution of the plate prior to buckling. This problem can be solved using finite element methods, but a quicker and more cost efficient method is desired. The method chosen to determine the pre-buckling stresses is that of boundary collocation using complex variables. The real valued force functions are written in terms of two complex valued functions, each of which is a function of a different complex variable. The solution of the generalized biharmonic function is a superposition of functions of these two complex variables. For this analysis, the force functions are represented with a Laurent series. The constants in these series are found using boundary collocation. Two force equations for complex variables are satisfied over the plate boundaries to obtain these constants. The stresses in the plate are then known for any particular locations on the plate given the applied shear on the edges of the plate

CONSUMER POTATO DEMAND

Changes in consumer demographics, socioeconomic conditions, lifestyles, food tastes, and health and nutrition concerns have been associated with shifting food purchase patterns. This article focuses on potato purchase decisions and consumption, using a sample of Washington households. The results suggest that potato purchases are affected by factors such as product quality and price but not availability of point-of-purchase information. Reported changes in fresh and processed potato consumption appeared to be related to concerns with health and nutrition and demand for convenience. These findings have implications for the potato industry in developing new products and marketing strategies.Demand and Price Analysis,

Judicial fact finding: trial by judge alone in serious criminal cases

The ability to choose between trial by jury and trial by judge alone in some jurisdictions presupposes a rational basis for exercising the choice. In this article, the author examines judicial factfinding modalities from comparative and systemic perspectives. The conclusion drawn is that both judicial fact-finders and lay fact-finders process their decision-making similarly. In both instances, fact-finding involves the assimilation of disparate and sometimes complex information. In each case, the drawing of inferences is, of necessity, dependent upon heuristic reasoning. Furthermore, the application of principles of law to proven facts is inexact. However, there are a number of inbuilt safeguards in judicial fact-finding that promote rationality and inhibit cognitive illusion.Vicki Way