High Rate Performance of Drift Tubes

This article describes calculations and measurements of space charge effects due to high rate irradiation in high resolution drift tubes. Two main items are studied: the reduction of the gas gain and changes of the drift time. Whereas the gain reduction is similar for all gases and unavoidable, the drift time changes depend on the kind of gas that is used. The loss in resolution due to high particle rate can be minimized with a suitable gas. This behaviour is calculable, allowing predictions for new gas mixtures.Comment: 20 pages, submitted to Nuclear Instruments and Methods

NADP efficiently inhibits endogenous but not pertussis toxin-catalyzed co valent modification of membrane proteins incubated with NAD

AbstractIncubation of membranes of human erythrocytes and platelets but not of human neutrophils with [32P]NAD leads to covalent modification of various membrane proteins and of added albumin. In membranes of all three cell types, pertussis toxin (PT), in the presence of NAD, specifically labelled a 40 kDa peptide, i.e. the α-subunit of a guanine nucleotide-binding protein. This effect of PT was slightly reduced by NADP, whereas modification of other membrane proteins and of albumin was largely suppressed, independent of whether PT was present or not. Labelling of cytosolic proteins in the presence of NAD was marginal; only in neutrophil cytosol, PT modified a 40 kDa peptide. Membranes of erythrocytes and platelets exhibited NAD-degrading activity, which was inhibited by NADP. The data suggest a high substrate specificity of PT for NAD. Inhibition of endogenous enzymes by NADP may prove useful for the evaluation of PT substrates

Variations in swine prices within Iowa including a study in statistical procedure

Iowa\u27s agriculture is chiefly corn-hog farming. Corn, which is produced in abundance, provides the raw material upon which the gigantic livestock industry depends. The sale of swine is the most important source of income of the state. Profound changes have taken place in the economics of hog marketing during the last decade. Three-fifths of Iowa hogs are today sold direct to packers; receipts at public stockyards have declined accordingly. Concentration points have been established throughout the hog producing area. Order buying has become well developed. Add to these the improvements in rural transportation, better market news facilities, standardization of hog grades and the comparatively large scale country buying that is practiced today and it becomes apparent that the machinery for marketing hogs is strikingly different from that which served producers only a few years ago

Design of linear and nonlinear control systems via state variable feedback, with applications in nuclear reactor control

Linear and nonlinear control systems via state variable feedback with applications in nuclear reactor contro

Research in and the Application of Modern Automatic Control Theory to Nuclear Rocket Dynamics and Control Semiannual Status Report, Vol. II

Second Method of Liapunov, Popov frequency criterion, and matrix inequality method used to study stability of nonlinear and/or time dependent control system

Navigation/traffic control satellite mission study. Volume 2 - Systems analyses

Systems analysis of spacecraft network for transoceanic traffic contro

Impacts of Economic and Psychological Factors on Women’s Obesity and Food Assistance Program Participation: Evidence from the NLSY Panel

Over the past thirty-five years, the U.S. adult obesity rate has more than doubled from roughly 15% to 35%, reflecting a general diffusion of obesity across all segments of the adult population (USDHHS). Obesity is a concern because it increases the risk for cardiovascular diseases, diabetes, and most forms of cancer, except for lung. Earlier studies of obesity of U.S. adults have largely focused on data in a single cross-section or one round of a panel survey. Chen and Huffman (2010) show that food and drink prices significantly affect U.S. women’s probability of being obese but not for men. However, the impact of individual food and drink prices are not always as expected