Bureau of Mines research on lunar resource utilization

Lunar resource utilization progra

Don Kaldor Memorial Lecture Concepts Of Entrepreneurship And Agricultural Research

I BEGIN WITH THREE INNOCENT QUESTIONS. WHO ARE THE ENTREPRENEURS IN OUR SOCIETY? WHAT DO THEY DO AS ENTREPRENEURS? What is the economic value of the function they perform? On the first question, entrepreneurship is a pervasive activity because of the social and economic dynamics that characterizes our society and because no one—not even ivory tower professors OR institutionalized priests—can escape the on-going dynamics. ACCOMMODATIONS and adjustments are the order of the DAY/ AND these entail entrepreneurship

Effects of crop acreage control features of AAA on feed production in 11 Midwest states

This bulletin is the product of studies in the appraisal of governmental agricultural programs in progress at Iowa State College. The statistics upon which most of the conclusions relative to the effect of the AAA upon the production of feedstuffs are based are the estimates of feed production in the 3-year period, 1938-40, without crop acreage control. The manner in which the various estimates have been derived is explained in some detail in a series of fairly elaborate footnotes appended to tables 5 to 15, inclusive. The basic assumptions underlying these estimates are given in these footnotes. Available, relevant, empirical data are considered, and the appraisal and criticism of other research workers are taken into account.2 The quantification of these assumptions into estimates of feed production without crop acreage control are in the last analysis those of the authors, and, as all estimates, are subject to error. They are, it is believed, the best approximation that it is possible to make with the evidence now available of what the feed production would have been in the various parts of the Midwest had there been no AAA

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

Uniaxial magnetocrystalline anisotropy in CaRuO3{\rm CaRuO_3}

${\rm CaRuO_3}$ is a paramagnetic metal and since its low temperature resistivity is described by $\rho=\rho_0+AT^\gamma$ with $\gamma \sim 1.5$, it is also considered a non-Fermi liquid (NFL) metal. We have performed extensive magnetoresistance and Hall effect measurements of untwinned epitaxial films of ${\rm CaRuO_3}$. These measurements reveal that ${\rm CaRuO_3}$ exhibits uniaxial magnetocrystalline anisotropy. In addition, the low-temperature NFL behavior is most effectively suppressed when a magnetic field is applied along the easy axis, suggesting that critical spin fluctuations, possibly due to proximity of a quantum critical phase transition, are related to the NFL behavior.Comment: 7 figure

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

Impacts of Personality on Herding in Financial Decision-Making

It is well known that rational bubbles can be sustained in balanced growth path of a deterministic economy when the return to capital r is equal to the growth rate g. When there is a lack of stores of value, bubbles can implement an efficient allocation. This paper considers a world where r fluctuates over time due to shocks to the marginal productivity of capital. Then, bubbles further efficiency, though they cannot implement first best. While bubbles can only be sustained when r = g in a deterministic economy, r > g "on average" in a stochastic economy. Fiscal policy improves welfare by adding an extra asset. Where only the elderly contribute to shifting resources between investment and consumption in a bubbly economy, fiscal policy allows part of that burden to be shifted to the young. Contrary to common wisdom, trade in bubbly assets implements intergenerational transfers, while fiscal policy implements intragenerational transfers. Hence, while bubbles and fiscal policy are perfect substitutes in the deterministic economy, fiscal policy dominates bubbles in a stochastic economy. For plausible parameter values, a higher degree of dynamic inefficiency should lead to a higher sovereign debt

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

Single and Many Particle Correlation Functions and Uniform Phase Bases for Strongly Correlated Systems

The need for suitable many or infinite fermion correlation functions to describe some low dimensional strongly correlated systems is discussed. This is linked to the need for a correlated basis, in which the ground state may be postive definite, and in which single particle correlations may suffice. A particular trial basis is proposed, and applied to a certain quasi-1D model. The model is a strip of the 2D square lattice wrapped around a cylinder, and is related to the ladder geometries, but with periodic instead of open boundary conditions along the edges. Analysis involves a novel mean-field approach and exact diagonalisation. The model has a paramagnetic region and a Nagaoka ferromagnetic region. The proposed basis is well suited to the model, and single particle correlations in it have power law decay for the paramagnet, where the charge motion is qualitatively hard core bosonic. The mean field also leads to a BCS-type model with single particle long range order.Comment: 23 pages, in plain tex, 12 Postscript figures included. Accepted for publication in J.Physics : Condensed Matte