Robert J. Brecha

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The events of March 2011 at the nuclear power complex in Fukushima, Japan, raised questions about the safe operation of nuclear power plants, with early retirement of existing nuclear power plants being debated in the policy arena and considered by regulators. Also, the future of building new nuclear power plants is highly uncertain. Should nuclear power(More)
A degenerate gas of identical fermions is brought to collapse by the interaction with a Bose-Einstein condensate. We used an atomic mixture of fermionic potassium-40 and bosonic rubidium-87, in which the strong interspecies attraction leads to an instability above a critical number of particles. The observed phenomenon suggests a direction for manipulating(More)
We report on the Bose-Einstein condensation of potassium atoms, whereby quantum degeneracy is achieved by sympathetic cooling with evaporatively cooled rubidium. Because of the rapid thermalization of the two different atoms, the efficiency of the cooling process is high. The ability to achieve condensation by sympathetic cooling with a different species(More)
a r t i c l e i n f o We analyze the relationship between economic development and energy consumption in the context of greenhouse gas mitigation. The main contribution of this work is to compare estimates of energy thresholds in the form of minimum energy requirements to reach high levels of development with output projections of per capita final energy(More)
The data files contain the assumptions and results for the construction of cumulative availability curves for coal, oil and gas for the five Shared Socioeconomic Pathways. The files include the maximum availability (also known as cumulative extraction cost curves) and the assumptions that are applied to construct the SSPs. The data is differentiated into(More)
1. Description of the ReMIND‐R model 1.1. Overview REMIND-R is a global energy-economy-climate model. This model description is based on the introduction of the REMIND-R model [1], as well as the technical description in [2,3]. More information is also available from the ReMIND-website 1. Fig. S1 provides an overview of the general structure of ReMIND-R.(More)
Observations of the oscillatory exchange of excitation between N two-state atoms and a single mode of a high-finesse optical cavity are reported in a regime of weak-field excitation and of comparable atomic and cavity damping rates. The observed frequencies of oscillation, approximately given by g p N , where g is the single-photon Rabi frequency, are in(More)
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