3,236 research outputs found

    Non-zero density-velocity consistency relations for large scale structures

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    We present exact kinematic consistency relations for cosmological structures that do not vanish at equal times and can thus be measured in surveys. These rely on cross-correlations between the density and velocity, or momentum, fields. Indeed, the uniform transport of small-scale structures by long wavelength modes, which cannot be detected at equal times by looking at density correlations only, gives rise to a shift in the amplitude of the velocity field that could be measured. These consistency relations only rely on the weak equivalence principle and Gaussian initial conditions. They remain valid in the non-linear regime and for biased galaxy fields. They can be used to constrain non-standard cosmological scenarios or the large-scale galaxy bias.Comment: 5 page

    A partial classification of simple regular representations of bimodules type (2,2)(2,\,2) over C( ⁣(ε) ⁣)\mathbb{C}(\!(\varepsilon)\!)

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    In this paper, we use Galois descent techniques to find suitable representatives of the regular simple representations of the species of type (2,2)(2,2) over kn:=k[ε1/n]k_n := k[\varepsilon^{1/n}], where nn is a positive integer and k:=C( ⁣(ε) ⁣)k:=\mathbb{C}(\!(\varepsilon)\!) is the field of Laurent series over the complexes. These regular representations are essential for the definition of canonical algebras. Our work is inspired by the work done for species of type (1,4)(1,4) on kk in ``A model for the canonical algebras of bimodules type (1, 4) over truncated polynomial rings''. We presents all the regular simple representations on the nn-crown quiver, and from these, we establish a partial classification of regular simple representations of bimodules type (2,2)(2,2).Comment: 26 pages, comments welcom

    Autothermal slow pyrolysis of poplar wood chips in an auger reactor

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    A Systematic Evaluation of a Multidisciplinary Social Work– Lawyer Elder Mistreatment Intervention Model

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    This study introduces a conceptually based, systematic evaluation process employing multivariate techniques to evaluate a multidisciplinary social work–lawyer intervention model (JASA-LEAP). Logistic regression analyses were used with a random sample of case records (n = 250) from three intervention sites. Client retention, program fidelity, and exposure to multidisciplinary services were significantly related to reduction in mistreatment risk at case closure. Female gender, married status, and living with perpetrator significantly predicted unfavorable outcomes. This study extends the elder mistreatment program evaluation literature beyond descriptive/bivariate evaluation strategies. Findings suggest that a multidisciplinary social work–lawyer elder mistreatment intervention model is a successful approach

    A High Resolution Survey of the Galactic Plane at 408 MHz

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    The interstellar medium is a complex 'ecosystem' with gas constituents in the atomic, molecular, and ionized states, dust, magnetic fields, and relativistic particles. The Canadian Galactic Plane Survey has imaged these constituents with angular resolution of the order of arcminutes. This paper presents radio continuum data at 408 MHz over the area 52 degrees < longitude < 193 degrees, -6.5 degrees < latitude < 8.5 degrees, with an extension to latitude = 21 degrees in the range 97 degrees < longitude < 120 degrees, with angular resolution 2.8' x 2.8' cosec(declination). Observations were made with the Synthesis Telescope at the Dominion Radio Astrophysical Observatory as part of the Canadian Galactic Plane Survey. The calibration of the survey using existing radio source catalogs is described. The accuracy of 408-MHz flux densities from the data is 6%. Information on large structures has been incorporated into the data using the single-antenna survey of Haslam (1982). The paper presents the data, describes how it can be accessed electronically, and gives examples of applications of the data to ISM research.Comment: Accepted for publication in the Astronomical Journa

    Flavour-Changing Neutral Currents and Leptophobic Z' Gauge Bosons

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    Leptophobic Z' gauge bosons can appear in models with an E_6 gauge symmetry. We show that flavour-changing neutral currents can be generated in some of these models due to the mixing of the ordinary d_R, s_R and b_R quark fields with the exotic h_R. Because the Z' does not couple to charged leptons, the constraints on the flavour-changing couplings U^{Z'}_{db} and U^{Z'}_{sb} are relatively weak. Indeed, B_q--Bbar_q mixing (q=d,s) can be dominated by Z' exchange, which will affect CP-violating rate asymmetries in B decays. Rare hadronic B decays can also be affected, while decays involving charged leptons will be unchanged.Comment: 11 pages, LaTeX, no figure

    Regulation of β cell glucokinase by S-nitrosylation and association with nitric oxide synthase

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    Glucokinase (GK) activity plays a key role in glucose-stimulated insulin secretion from pancreatic β cells. Insulin regulates GK activity by modulating its association with secretory granules, although little is known about the mechanisms involved in regulating this association. Using quantitative imaging of multicolor fluorescent proteins fused to GK, we found that the dynamic association of GK with secretory granules is modulated through nitric oxide (NO). Our results in cultured β cells show that insulin stimulates NO production and leads to S-nitrosylation of GK. Furthermore, inhibition of NO synthase (NOS) activity blocks insulin-stimulated changes in both GK association with secretory granules and GK conformation. Mutation of cysteine 371 to serine blocks S-nitrosylation of GK and causes GK to remain tightly bound to secretory granules. GK was also found to interact stably with neuronal NOS as detected by coimmunoprecipitation and fluorescence resonance energy transfer. Finally, attachment of a nuclear localization signal sequence to NOS drives GK to the nucleus in addition to its normal cytoplasmic and granule targeting. Together, these data suggest that the regulation of GK localization and activity in pancreatic β cells is directly related to NO production and that the association of GK with secretory granules occurs through its interaction with NOS
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