7,111 research outputs found

    Source rock prospectivity of lower Carboniferous lacustrine strata, Anguille Group, Conche, Newfoundland

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    In Eastern Canada, in a regional Carboniferous rift system (Maritimes Basin Tectonostratigraphic Zone), there are lacustrine basins containing petroliferous source rocks. Near the northern limits for this complex, strata of the Cape Rouge Formation at Conche, Newfoundland, are thought to represent a nearby onshore facies analog for rocks laying farther offshore in the St. Anthony Basin. Four facies assemblages of mixed sandstone, siltstone, dolostone and black mudstone represent distinct stages of an underfilled lake-basin developed within a half-graben depocenter. The finest-grained facies assemblage, with TOC between 0.23-6.54 wt.%, has organic matter dominated by Type 1 kerogen. Maturation analysis places strata within the oil-generation window (Rₒ=0.5-1.01%); however, Rock-Eval results indicate little remaining potential for generating hydrocarbons. Based on findings from Conche, the St. Anthony Basin may contain similar half-graben lake-basins with Carboniferous source rock potential. However, source quality and timing for oil generation remain key risks for hydrocarbon exploration offshore

    A model for orientation effects in electron‐transfer reactions

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    A method for solving the single‐particle Schrödinger equation with an oblate spheroidal potential of finite depth is presented. The wave functions are then used to calculate the matrix element T_BA which appears in theories of nonadiabatic electron transfer. The results illustrate the effects of mutual orientation and separation of the two centers on TBA. Trends in these results are discussed in terms of geometrical and nodal structure effects. Analytical expressions related to T_BA for states of spherical wells are presented and used to analyze the nodal structure effects for T_BA for the spheroidal wells

    Energies of Quantum QED Flux Tubes

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    In this talk I present recent studies on vacuum polarization energies and energy densities induced by QED flux tubes. I focus on comparing three and four dimensional scenarios and the discussion of various approximation schemes in view of the exact treatment.Comment: 9 pages latex, Talk presented at the QFEXT 05 workshop in Barcelona, Sept. 2005. To appear in the proceeding

    New Sum-Product Estimates for Real and Complex Numbers

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    A variation on the sum-product problem seeks to show that a set which is defined by additive and multiplicative operations will always be large. In this paper, we prove new results of this type. In particular, we show that for any finite set A of positive real numbers, it is true that |{a+bc+d:a,b,c,d∈A}|≥2|A|2-1.As a consequence of this result, it is also established that |4k-1A(k)|:=|A…A⏟ktimes+⋯+A…A⏟4k-1times|≥|A|k.Later on, it is shown that both of these bounds hold in the case when A is a finite set of complex numbers, although with smaller multiplicative constants. © 2015, Springer Science+Business Media New York

    The rural hot lunch

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    This bulletin provides suggestions for rural schools hot lunch. Includes bibliographical references

    Land-based resistance:Enacting Indigenous self-determination and kai sovereignty

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    This article outlines the role of land relations in the advancement of food sovereignty in the settler colonial context of Aotearoa New Zealand by exploring how land-based anti-colonial resistance movements, including the recent #ProtectIhumātao campaign, can inform food system transformation. First, this article draws on theories of Indigenous food sovereignty, land sovereignty, and critical property theory to argue that in settler colonial contexts, food sovereignty movements must take a critical approach to questions of the state and sovereignty, property relations, and Indigenous struggles for territorial authority and self-determination. Drawing on land-based resistance movements which have included food production as a method of reclamation, this article further proposes a need to understand food sovereignty in the Aotearoa context as firmly grounded in Māori land sovereignty and territorial authority. Finally, this article explores how the struggle to protect Ihumātao ruptured the seemingly settled nature of property relations and state sovereignty, opening space for the articulation of new modes of land governance and new constitutional arrangements more conducive to Māori aspirations for land management and stewardship—including food sovereignty

    Ralph Leroy Menzies v. Hank Galetka : Reply Brief of Cross-Appellant

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    This is the reply brief of Cross-Appellant in a capital post-conviction case presided over by the Honorable Pat B. Brian, Judge of the Third District Court, West Valley Department, Salt Lake County, State of Utah

    Adaptive grid methods for Q-tensor theory of liquid crystals : a one-dimensional feasibility study

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    This paper illustrates the use of moving mesh methods for solving partial differential equation (PDE) problems in Q-tensor theory of liquid crystals. We present the results of an initial study using a simple one-dimensional test problem which illustrates the feasibility of applying adaptive grid techniques in such situations. We describe how the grids are computed using an equidistribution principle, and investigate the comparative accuracy of adaptive and uniform grid strategies, both theoretically and via numerical examples

    Expanders with superquadratic growth

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    We prove several expanders with exponent strictly greater than 2. For any finite set A ⊂ ℝ, we prove the following six-variable expander results: (Formula Presented)

    John O. Newton Correspondence

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    Entries include brief biographical information, a typed biographical letter, and a handwritten letter of correspondence on plain paper
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