Miniature capacitive accelerometer is especially applicable to telemetry

Capacitive accelerometer design enables the construction of highly miniaturized instruments having full-scale ranges from 1 g to several hundred g. This accelerometer is applicable to telemetry and can be tailored to cover any of a large number of acceleration ranges and frequency responses

Meson PVV Interactions are determined by Quark Loops

We show that all abnormal parity three-body meson interactions can be adequately described by quark loops, evaluated at zero external momentum, with couplings determined by $U(N_f)$ symmetry. We focus primarily on radiative meson decays which involve one pseudoscalar. The agreement with experiment for non-rare decays is surprisingly good and requires very few parameters, namely the coupling constants $g_{\pi qq}$ and $g_{\rho qq}$ and some mixing angles. This agreement extends to some three-body decays that are dominated by pion pairs in a P-wave state.Comment: 21 pages, Revtex, one figur

Anomalies in Quantum Mechanics: the 1/r^2 Potential

An anomaly is said to occur when a symmetry that is valid classically becomes broken as a result of quantization. Although most manifestations of this phenomenon are in the context of quantum field theory, there are at least two cases in quantum mechanics--the two dimensional delta function interaction and the 1/r^2 potential. The former has been treated in this journal; in this article we discuss the physics of the latter together with experimental consequences.Comment: 16 page latex file; to be published in Am. J. Phy

Can we get there from here? Ecosystem based governance in the Bay of Fundy/Gulf of Maine region

Decades, even centuries, of resource extraction and exploitation by humans have taken a toll on the Bay of Fundy/Gulf of Maine ecosystems. The very real threats posed by population growth and coastal development, climate change, habitat loss, overharvesting, chemical pollution, nutrient overloading, and invasive species invasions show no sign of abating. Traditional methods of managing the human activities that impact the Bay of Fundy/Gulf of Maine are proving unable to keep pace with the growing threats. The Gulf of Maine Council and others have joined in the chorus calling for a broader, more holistic ecosystem approach to the governance of the human activities that impact the coastal margin. This study uses the framework of the Policy Sciences to suggest a model of Problem Orientation, Social Process, and Decision Process characteristics indicative of an ideal ecosystem-based approach to governance. The model is first used to analyze the governance regime that existed in the Great Lakes Basin during the first two decades under the International Joint Commission\u27s oversight of activities under the Great Lakes Water Quality Agreement. The framework model is then used to analyze the current governance regime in the Gulf of Maine/Bay of Fundy region. Using this analysis, the study concludes that an ecosystem-based approach to governance is not possible in the region as currently configured. The study further concludes that it will not be possible to transition to an ecosystem-based approach without the education and significant outreach necessary to create a knowledgeable and activist public able to understand the issues and threats and willing to press governance for improvement. Further, ecosystem-based governance will require the creation of an overarching and accountable entity that, with significant input from public and stakeholder partnerships can collect reliable ecosystem indicator data from both sides of the border, analyze the data, and direct the implementation of policy solutions, and change course as necessary

Momentum and Coordinate Space Three-nucleon Potentials

In this paper we give explicit formulae in momentum and coordinate space for the three-nucleon potentials due to $\rho$ and $\pi$ meson exchange, derived from off-mass-shell meson-nucleon scattering amplitudes which are constrained by the symmetries of QCD and by the experimental data. Those potentials have already been applied to nuclear matter calculations. Here we display additional terms which appear to be the most important for nuclear structure. The potentials are decomposed in a way that separates the contributions of different physical mechanisms involved in the meson-nucleon amplitudes. The same type of decomposition is presented for the $\pi - \pi$ TM force: the $\Delta$, the chiral symmetry breaking and the nucleon pair terms are isolated.Comment: LATEX, 33 pages, 3 figures (available as postscript files upon request

True Blue

https://digitalcommons.library.umaine.edu/mmb-vp/6583/thumbnail.jp

The Economic Impact of North Dakota's Health Care Industry on the State's Economy in 1991

The health care industry's far-reaching economic influence within North Dakota is the focus of this report. An input-output model is used to estimate the economic impact of hospitals and long-term care nursing facilities. The analysis shows that nearly 8 percent of the state's total business activity, nearly 10 percent of the state's total retail sales, and nearly 19 percent of the state's total employment in 1991 were attributable to hospitals and long-term care nursing facilities. In addition, these facilities generated nearly $41 million of tax revenues for the state in 1991.Health Economics and Policy,

Triton calculations with π\pi and ρ\rho exchange three-nucleon forces

The Faddeev equations are solved in momentum space for the trinucleon bound state with the new Tucson-Melbourne $\pi$ and $\rho$ exchange three-nucleon potentials. The three-nucleon potentials are combined with a variety of realistic two-nucleon potentials. The dependence of the triton binding energy on the $\pi NN$ cut-off parameter in the three-nucleon potentials is studied and found to be reduced compared to the case with pure $\pi$ exchange. The $\rho$ exchange parts of the three-nucleon potential yield an overall repulsive effect. When the recommended parameters are employed, the calculated triton binding energy turns out to be very close to its experimental value. Expectation values of various components of the three-nucleon potential are given to illustrate their significance for binding.Comment: 17 pages Revtex 3.0, 4 figures. Accepted for publication in Phys. Rev.

Does The 3N-Force Have A Hard Core?

The meson-nucleon dynamics that generates the hard core of the RuhrPot two-nucleon interaction is shown to vanish in the irreducible 3N force. This result indicates a small 3N force dominated by conventional light meson-exchange dynamics and holds for an arbitrary meson-theoretic Lagrangian. The resulting RuhrPot 3N force is defined in the appendix. A completely different result is expected when the Tamm-Dancoff/Bloch-Horowitz procedure is used to define the NN and 3N potentials. In that approach, (e.g. full Bonn potential) both the NN {\it and} 3N potentials contain non-vanishing contributions from the coherent sum of meson-recoil dynamics and the possibility of a large hard core requiring explicit calculation cannot be ruled out.Comment: 16 pages REVTeX + 3 ps fig