5,299 research outputs found

    Interpretations of the Accelerating Universe

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    It is generally argued that the present cosmological observations support the accelerating models of the universe, as driven by the cosmological constant or `dark energy'. We argue here that an alternative model of the universe is possible which explains the current observations of the universe. We demonstrate this with a reinterpretation of the magnitude-redshift relation for Type Ia supernovae, since this was the test that gave a spurt to the current trend in favour of the cosmological constant.Comment: 12 pages including 2 figures, minor revision, references added, a paragraph on the interpretation of the CMB anisotropy in the QSSC added in conclusion, general results unchanged. To appear in the October 2002 issue of the "Publications of the Astronmical Society of the Pacific

    Detachment, Futile Cycling and Nucleotide Pocket Collapse in Myosin-V Stepping

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    Myosin-V is a highly processive dimeric protein that walks with 36nm steps along actin tracks, powered by coordinated ATP hydrolysis reactions in the two myosin heads. No previous theoretical models of the myosin-V walk reproduce all the observed trends of velocity and run-length with [ADP], [ATP] and external forcing. In particular, a result that has eluded all theoretical studies based upon rigorous physical chemistry is that run length decreases with both increasing [ADP] and [ATP]. We systematically analyse which mechanisms in existing models reproduce which experimental trends and use this information to guide the development of models that can reproduce them all. We formulate models as reaction networks between distinct mechanochemical states with energetically determined transition rates. For each network architecture, we compare predictions for velocity and run length to a subset of experimentally measured values, and fit unknown parameters using a bespoke MCSA optimization routine. Finally we determine which experimental trends are replicated by the best-fit model for each architecture. Only two models capture them all: one involving [ADP]-dependent mechanical detachment, and another including [ADP]-dependent futile cycling and nucleotide pocket collapse. Comparing model-predicted and experimentally observed kinetic transition rates favors the latter.Comment: 11 pages, 5 figures, 6 table

    On searches for gravitational waves from mini creation event by laser interferometric detectors

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    As an alternative view to the standard big bang cosmology the quasi-steady state cosmology(QSSC) argues that the universe was not created in a single great explosion; it neither had a beginning nor will it ever come to an end. The creation of new matter in the universe is a regular feature occurring through finite explosive events. Each creation event is called a mini-bang or, a mini creation event(MCE). Gravitational waves are expected to be generated due to any anisotropy present in this process of creation. Mini creation event ejecting matter in two oppositely directed jets is thus a source of gravitational waves which can in principle be detected by laser interferometric detectors. In the present work we consider the gravitational waveforms propagated by linear jets and then estimate the response of laser interferometric detectors like LIGO and LISA

    On the formation of elliptical galaxies

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    Formation of elliptical galaxie

    A Radical Departure from the ''steady State'' Concept in Cosmology

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    Radical departure from steady state theory in cosmolog

    The Consequences of Perfectionism Scale: Factorial structure and relationships with perfectionism, performance perfectionism, affect, and depressive symptoms

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    This study investigated the Consequences of Perfectionism Scale (COPS) and its relationships with perfectionism, performance perfectionism, affect, and depressive symptoms in 202 university students using confirmatory factor analysis, correlations, and regression analyses. Results suggest that the COPS is a reliable and valid measure of positive and negative consequences of perfectionism

    Response of Seven Woody Ornamentals to Turfgrass Herbicide Applications of Arylex, Penoxsulam, and Pyrimisulfan

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    Continued testing of turf-applied herbicides are being conducted to ensure off-target plant injury does not occur in the landscape. Results indicate high herbicide safety on select landscape ornamentals with new herbicides used to manage weeds in turf

    Native Turfgrass Tolerance to Indaziflam Applications

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    Multiple research trials were conducted from 2014 to 2016 in the Manhattan, KS, area to determine the use of indaziflam in native turfgrass systems. Results indicated that evaluated species are tolerant to indaziflam applications throughout the year

    Use of Pyrimisulfan and Penoxsulam in Turfgrass Systems

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    Pyrimisulfan + penoxsulam applications in ‘Meyer’ zoysiagrass and buffalograss resulted in excellent large crabgrass control and no turfgrass injury. Applications also do not have any negative influence on tested ornamental species
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