Double ionization of helium by particle impact

Experimental results are reviewed of the ratio, R sq., of double to single ionization of He by proton, antiproton, electron and positron impact in the energy range from 0.15 to about 10 MeV/amu. At high velocities (greater than 1 to 2 MeV/amu) values of R sq. caused by electron impact merge with those for the proton with the antiproton, electron values being up to a factor of 2 greater than that for the p, positron. At these velocities the single ionization cross sections caused by impact of any of these four particles are indistinguishable

An extreme ultraviolet photoemission study Final report

Photoelectric emission properties of iron, copper, nickel, aluminum, and molybdenu

Identification Of Environmental Variables For Use In Monitoring For The Evaluation Of The Rural Environment Protection Scheme

Teagasc wishes to acknowledge the support of the Environmental RTDI Programme 2000–2006 in financing this research project.End of project reportThe aim of this study was to identify and select quantitative environmental attributes for a monitoring programme that may be integrated into an environmental evaluation of Ireland’s agri-environmental scheme. This was achieved primarily by reviewing a range of agri-environmental indicators and suggesting indicators that would be appropriate for monitoring the REPS. The study conducted a desk review to collate information on current best practice in monitoring for environmental quality. A Project Group (comprising representatives from the Environmental Protection Agency [EPA], Department of Agriculture and Food [DAF], Teagasc, and the project supervisors) advised on the ongoing development of the project. There was a consultation process with national experts, and with a selection of stakeholder organisations with an interest in monitoring the environmental impact of the REPS.Environmental Protection Agenc

Monogamous order and the avoidance of chaotic excess

In Western culture sexual fidelity is widely regarded as a prime source of relationship stability and personal happiness and thus a worthy practice. This article is an empirical and critical account of monogamous coupledom as a privileged relational experience. Data is drawn from fourteen in-depth interviews with Australian men and women who self-identified their cross or same-sex partnerships as sexually and emotionally monogamous. Monogamy, as participants construct it, is critiqued as an action and policy that produces an exclusive and contained essence of relationships and that guards against a perceived chaotic excess that is set up in opposition to it. Such action is seen to impel a sense of mastery in relationships and selves that are properly enclosed, channelled and thereby ordered. The socio-historic binary arrangement of an ordered inside and chaotic outside is focussed on as enabling a superior monogamous order while also underpinning its precariousness and psychological frailty. Drawing on Deleuzian ideas about a non-privileged and non-hierarchical system of relating, an alternative way of intimately connecting with others is brought into theoretical view, one that does not favour contained and fixed essences as foundations for relationships, intimate connections and life

Does being different matter?

Changes in the demographic structure of the U.S. population will affect many aspects of the US economy as we move into the next century. Concerns about the impact of an aging population on savings and interest rates, the financing of government spending programs for the elderly, and the possibility of higher taxes for future generations to pay for them have become hot topics, both in the press and among economists. Another concern is whether rising immigration will place an even greater burden on the government. In this article, Finn Kydland and D'Ann Petersen present a framework economists can use to shed ight quantitatively on such issues where individual differences matter. They also discuss why, for a certain class of questions, being different does not matter. In the final section, the authors present findings from current research that deals with the issues mentioned above.Emigration and immigration ; Social security ; Saving and investment

Two-dimensional Stokes flow driven by elliptical paddles

A fast and accurate numerical technique is developed for solving the biharmonic equation in a multiply connected domain, in two dimensions. We apply the technique to the computation of slow viscous flow (Stokes flow) driven by multiple stirring rods. Previously, the technique has been restricted to stirring rods of circular cross section; we show here how the prior method fails for noncircular rods and how it may be adapted to accommodate general rod cross sections, provided only that for each there exists a conformal mapping to a circle. Corresponding simulations of the flow are described, and their stirring properties and energy requirements are discussed briefly. In particular the method allows an accurate calculation of the flow when flat paddles are used to stir a fluid chaotically

Regression with strongly correlated data

This paper discusses linear regression of strongly correlated data that arises, for example, in magnetohydrodynamic equilibrium reconstructions. We have proved that, generically, the covariance matrix of the estimated regression parameters for fixed sample size goes to zero as the correlations become unity. That is, in this limit the estimated parameters are known with perfect accuracy. Simple examples are shown to illustrate this effect and the nature of the exceptional cases in which the estimate covariance does not go to zero

48-year-old with Coronavirus Disease 2019

Case Presentation: A 48-year-old male who presented with signs and symptoms suggestive of an upper respiratory infection was seen at an urgent care, he had a negative chest radiograph and was discharged. With no other cases of coronavirus disease 2019 (COVID-19) in the state, the patient presented to the emergency department two days later with worsening shortness of breath.Discussion: There are a variety of findings on both chest radiograph and computed tomography of the chest that suggests COVID-19