1,629 research outputs found

    Understanding the indirect costs of renewable energy using real option theory

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    We examine the economic efficiency of incentive mechanisms used to promote renewable energy as a policy in the European Union (EU). We evaluate the financial performance of renewable investments and employ real option theory to model and analyze their impact in the EU’s liberalized electricity markets. Our analysis covers key European countries and uses five years of the most recent historic electricity price data from 2009 to consider sensitivities in key parameters. As renewable energy policies are presented as public goods to address environmental concerns, we explain how the financial performance of these policies can strike a balance between social costs and private benefits. We consider how markets may incorporate renewable energy without major adjustments. For other regions, our research offers lessons on effectiveness and cost-efficiency in designing renewables incentive schemes

    Getting the Right Mix: Developing a primary - secondary health provider IT interface in the Waikato District Health Board

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    The article presents a study on the electronic health record systems (EHR) developed by Waikato District Health Board (DHB) in New Zealand. The DHB develop EHR with the intention of integrating primary, secondary and tertiary provider information. The findings shows key issues like stability of a sound secondary health provider information technology (IT) infrastructure and basis of patient data on health industry standards

    Categories of insight and their correlates: An exploration of relationships among classic-type insight problems, rebus puzzles, remote associates and esoteric analogies.

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    A central question in creativity concerns how insightful ideas emerge. Anecdotal examples of insightful scientific and technical discoveries include Goodyear's discovery of the vulcanization of rubber, and Mendeleev's realization that there may be gaps as he tried to arrange the elements into the Periodic Table. Although most people would regard these discoveries as insightful, cognitive psychologists have had difficulty in agreeing on whether such ideas resulted from insights or from conventional problem solving processes. One area of wide agreement among psychologists is that insight involves a process of restructuring. If this view is correct, then understanding insight and its role in problem solving will depend on a better understanding of restructuring and the characteristics that describe it. This article proposes and tests a preliminary classification of insight problems based on several restructuring characteristics: the need to redefine spatial assumptions, the need to change defined forms, the degree of misdirection involved, the difficulty in visualizing a possible solution, the number of restructuring sequences in the problem, and the requirement for figure-ground type reversals. A second purpose of the study was to compare performance on classic spatial insight problems with two types of verbal tests that may be related to insight, the Remote Associates Test (RAT), and rebus puzzles. In doing so, we report on the results of a survey of 172 business students at the University of Waikato in New Zealand who completed classic-type insight, RAT and rebus problems

    A computationally efficacious free-energy functional for studies of inhomogeneous liquid water

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    We present an accurate equation of state for water based on a simple microscopic Hamiltonian, with only four parameters that are well-constrained by bulk experimental data. With one additional parameter for the range of interaction, this model yields a computationally efficient free-energy functional for inhomogeneous water which captures short-ranged correlations, cavitation energies and, with suitable long-range corrections, the non-linear dielectric response of water, making it an excellent candidate for studies of mesoscale water and for use in ab initio solvation methods.Comment: 6 pages, 5 figure

    Meteorological application of Apollo photography Final report

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    Development of meteorological information and parameters based on cloud photographs taken during Apollo 9 fligh

    Relative momentum for identical particles

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    Possible definitions for the relative momentum of identical particles are considered

    Generalized Quantum Dynamics as Pre-Quantum Mechanics

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    We address the issue of when generalized quantum dynamics, which is a classical symplectic dynamics for noncommuting operator phase space variables based on a graded total trace Hamiltonian H{\bf H}, reduces to Heisenberg picture complex quantum mechanics. We begin by showing that when H=TrH{\bf H}={\bf Tr} H, with HH a Weyl ordered operator Hamiltonian, then the generalized quantum dynamics operator equations of motion agree with those obtained from HH in the Heisenberg picture by using canonical commutation relations. The remainder of the paper is devoted to a study of how an effective canonical algebra can arise, without this condition simply being imposed by fiat on the operator initial values. We first show that for any total trace Hamiltonian which involves no noncommutative constants, there is a conserved anti--self--adjoint operator C~\tilde C with a structure which is closely related to the canonical commutator algebra. We study the canonical transformations of generalized quantum dynamics, and show that C~\tilde C is a canonical invariant, as is the operator phase space volume element. The latter result is a generalization of Liouville's theorem, and permits the application of statistical mechanical methods to determine the canonical ensemble governing the equilibrium distribution of operator initial values. We give arguments based on a Ward identity analogous to the equipartition theorem of classical statistical mechanics, suggesting that statistical ensemble averages of Weyl ordered polynomials in the operator phase space variables correspond to the Wightman functions of a unitary complex quantum mechanics, with a conserved operator Hamiltonian and with the standard canonical commutation relations obeyed by Weyl ordered operator strings. Thus there is a well--defined sense inComment: 79 pages, no figures, plain te

    Number-of-particle fluctuations in systems with Bose-Einstein condensate

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    Fluctuations of the number of particles for the dilute interacting gas with Bose-Einstein condensate are considered. It is shown that in the Bogolubov theory these fluctuations are normal. The fluctuations of condensed as well as noncondensed particles are also normal both in canonical and grand canonical ensembles.Comment: Latex file, 12 page
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