5,750 research outputs found

    Local authorities should be at the forefront of going green. This will see economic returns as well as environmental benefits

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    Paul O’Brien argues that councils should be leading the way with renewable energy schemes. They can reap important economic and social rewards as well as environmental benefits

    Surface Free Energies, Interfacial Tensions and Correlation Lengths of the ABF Models

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    The surface free energies, interfacial tensions and correlation lengths of the Andrews-Baxter-Forrester models in regimes III and IV are calculated with fixed boundary conditions. The interfacial tensions are calculated between arbitrary phases and are shown to be additive. The associated critical exponents are given by 2αs=μ=ν2-\alpha_s=\mu=\nu with ν=(L+1)/4\nu=(L+1)/4 in regime III and 42αs=μ=ν4-2\alpha_s=\mu=\nu with ν=(L+1)/2\nu=(L+1)/2 in regime IV. Our results are obtained using general commuting transfer matrix and inversion relation methods that may be applied to other solvable lattice models.Comment: 21 pages, LaTeX 2e, requires the amsmath packag

    Drivers of Choice: Parents, Transportation, and School Choice

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    Based on surveys of two districts, explores the extent to which distance, transportation time, and mode prevent low- and moderate-income families from choosing private, charter, or non-neighborhood schools. Calls for decentralized transportation policies

    Synthesis of CdS and CdSe nanoparticles by thermolysis of diethyldithio- or diethyldiseleno-carbamates of cadmium

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    Cadmium sulfide and cadmium selenide nanoparticles have been synthesised by a novel route involving the thermal decomposition of the bisdiethyldithio- or bisdiethyldiseleno-carbamates of cadmium in refluxing 4-ethylpyridine solutions. The nanodispersed materials were studied by electronic spectroscopy and bandgaps were blue shifted. Transmission electron microscopy of the samples showed material to be in the nanosize range and crystalline

    The Efficiency and the Conduct of European Banks: Developments after 1992

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    European Central Bank; economic integration; economic performance; EMU; Euro; financial markets

    Interaction-Round-a-Face Models with Fixed Boundary Conditions: The ABF Fusion Hierarchy

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    We use boundary weights and reflection equations to obtain families of commuting double-row transfer matrices for interaction-round-a-face models with fixed boundary conditions. In particular, we consider the fusion hierarchy of the Andrews-Baxter-Forrester models, for which we find that the double-row transfer matrices satisfy functional equations with an su(2) structure.Comment: 48 pages, LaTeX, requires about 79000 words of TeX memory. Submitted to J. Stat. Phy

    Effects of Immigration on Labour Markets and Government Budgets - An Overview

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    The paper provides an overview on recent trends of immigration in OECD countries and on the possible effects of immigration on labour markets and government budgets. It also discusses migration policies from an economic point of view. By bringing together a bulk of international literature on labour market and fiscal effects of migration in a systematic way it provides a framework for assessing the economic effects of migration and improving the knowledge base for migration policies.migration, labour markets, fiscal effects of migration

    The Force of a Tsunami on a Wave Energy Converter

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    With an increasing emphasis on renewable energy resources, wave power technology is fast becoming a realistic solution. However, the recent tsunami in Japan was a harsh reminder of the ferocity of the ocean. It is known that tsunamis are nearly undetectable in the open ocean but as the wave approaches the shore its energy is compressed creating large destructive waves. The question posed here is whether a nearshore wave energy converter (WEC) could withstand the force of an incoming tsunami. The analytical 3D model of Renzi & Dias (2012) developed within the framework of a linear theory and applied to an array of fixed plates is used. The time derivative of the velocity potential allows the hydrodynamic force to be calculated.Comment: 12 pages, 6 figures, 2 tables, 16 references. Paper presented at the ISOPE-2012 conference. Other author's papers can be downloaded at http://www.lama.univ-savoie.fr/~dutykh

    Introduction: Peasants, Pastoralists and Proletarians: Joining the Debates on Trajectories of Agrarian Change, Livelihoods and Land Use

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    Recent changes in the agrarian studies and geography literatures present differing views on the pace and trajectory of change in rural developing areas. In this special section of Human Geography, we contrast the theoretical and practice implications of these differing approaches, namely depeasantization, accumulation by dispossession and deproletarianization. Depeasantization refers to change in livelihood activities out of agriculture, long theorized as necessary for an area’s transition into capitalism. Accumulation by dispossession is a process of on-going capital accumulation where a give resource is privatized, seized, or in some other manner alienated from common ownership in order to provide a basis for continued capital accumulation. Deproletarianization occurs when workers are no longer able to freely commodify and recommodify their only commodity, their own labour. In this section, we explore these three theses with case studies that draw upon empirical data. The papers in this collection all speak to one aspect or another of these debates. We do not intend to try to determine a “best approach”, rather we explore strengths and weaknesses of each argument. The production of nature, change in the mode of production and the political economy of nature are discussed in the first article by Brent McCusker. Phil O’Keefe and Geoff O’Brien examine the evolution of worked landscape under pre-capitalist modes of production in riverine ecologies. Through further case studies, Paul O’Keefe explores links between livelihoods and climate change in Mt. Kilimanjaro, Tanzania, while Franklin Graham explores the persistence of pastoralism in the Sahel. Finally, Naomi Shanguhyia and Brent McCusker examine the process of governance in dry land Kenya through the study of chronic food shortages
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