943 research outputs found

    Oral Tau Aggregation Inhibitor for Alzheimer’s Disease : Design, Progress and Basis for Selection of the 16 mg/day Dose in a Phase 3, Randomized, Placebo-Controlled Trial of Hydromethylthionine Mesylate

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    Funding Information: We gratefully acknowledge the contribution of the scientific advisory board, study investigators, and the generosity of study participants. The authors thank EVERSANA™ for providing medical writing support, which was funded by TauRx Therapeutics in accordance with Good Publication Practice (GPP3) guidelines ( http://www.ismpp.org/gpp3 ). Publisher Copyright: © 2022, The Author(s).Peer reviewedPublisher PD

    Collective Value QoS: A Performance Measure Framework for Distributed Heterogeneous Networks

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    When users' tasks in a distributed heterogeneous computing environment are allocated resources, and the total demand placed on system resources by the tasks, for a given interval of time, exceeds the resources available, some tasks will receive degraded service, receive no service at all, or may be dropped from the system. One part of a measure to quantify the success of a resource management system (RMS) in such an environment is the collective value of the tasks completed during an interval of time, as perceived by the user, the application, or the policy maker. For the case where a task may be a data communication request, the collective value of data communication requests that are satisfied during an interval of time is measured. The Flexible Integrated System Capability (FISC) measure defined here is one way of obtaining a multi-dimensional measure for quantifying this collective value. While the FISC measure itself is not sufficient for scheduling purposes, it can be a critical part of a scheduler or a scheduling heuristic. The primary contribution of this work is providing a way to measure the collective value accrued by an RMS using a broad range of attributes and to construct a flexible framework that can be extended for particular problem domains.DARPA/ITO Quorum ProgramDARPA/ISO BADD ProgramOffice of Naval Research under ONR grant number N00014-97-1-0804DARPA/ITO AICE program under contract numbers DABT63-99-C-0010 and DABT63-99-C-0012DARPA/ITO Quorum ProgramDARPA/ISO BADD ProgramOffice of Naval Research under ONR grant number N00014-97-1-0804DARPA/ITO AICE program under contract numbers DABT63-99-C-0010 and DABT63-99-C-0012Approved for public release; distribution is unlimited

    Genetic diversity of Legionella pneumophila inferred from rpoB and dotA sequences

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    ABSTRACTThis study characterised the population structure of Legionella pneumophila by comparing the rpoB (300-bp) and dotA (360-bp) sequences of 267 isolates (18 reference strains, 149 Korean isolates and 100 Japanese isolates). In addition to the six clonal subgroups established previously, four subgroups, P-V to P-VIII, were identified. Subgroupings based on rpoB and dotA sequences were found to correlate with the source of the isolates, and this data may be useful for future epidemiological studies. Fourteen (five Korean and nine Japanese) isolates showed incongruent subgroupings in the rpoB and dotA trees, suggesting that genetic exchange among subgroups, and even among subspecies, may occur frequently in nature

    The Evolution of the Galaxy Stellar Mass Function at z= 4-8: A Steepening Low-mass-end Slope with Increasing Redshift

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    We present galaxy stellar mass functions (GSMFs) at z=z= 4-8 from a rest-frame ultraviolet (UV) selected sample of \sim4500 galaxies, found via photometric redshifts over an area of \sim280 arcmin2^2 in the CANDELS/GOODS fields and the Hubble Ultra Deep Field. The deepest Spitzer/IRAC data yet-to-date and the relatively large volume allow us to place a better constraint at both the low- and high-mass ends of the GSMFs compared to previous space-based studies from pre-CANDELS observations. Supplemented by a stacking analysis, we find a linear correlation between the rest-frame UV absolute magnitude at 1500 \AA\ (MUVM_{\rm UV}) and logarithmic stellar mass (logM\log M_*) that holds for galaxies with log(M/M)10\log(M_*/M_{\odot}) \lesssim 10. We use simulations to validate our method of measuring the slope of the logM\log M_*-MUVM_{\rm UV} relation, finding that the bias is minimized with a hybrid technique combining photometry of individual bright galaxies with stacked photometry for faint galaxies. The resultant measured slopes do not significantly evolve over z=z= 4-8, while the normalization of the trend exhibits a weak evolution toward lower masses at higher redshift. We combine the logM\log M_*-MUVM_{\rm UV} distribution with observed rest-frame UV luminosity functions at each redshift to derive the GSMFs, finding that the low-mass-end slope becomes steeper with increasing redshift from α=1.550.07+0.08\alpha=-1.55^{+0.08}_{-0.07} at z=4z=4 to α=2.250.35+0.72\alpha=-2.25^{+0.72}_{-0.35} at z=8z=8. The inferred stellar mass density, when integrated over M=108M_*=10^8-1013M10^{13} M_{\odot}, increases by a factor of 102+3010^{+30}_{-2} between z=7z=7 and z=4z=4 and is in good agreement with the time integral of the cosmic star formation rate density.Comment: 27 pages, 17 figures, ApJ, in pres

    Boundary driven zero-range processes in random media

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    The stationary states of boundary driven zero-range processes in random media with quenched disorder are examined, and the motion of a tagged particle is analyzed. For symmetric transition rates, also known as the random barrier model, the stationary state is found to be trivial in absence of boundary drive. Out of equilibrium, two further cases are distinguished according to the tail of the disorder distribution. For strong disorder, the fugacity profiles are found to be governed by the paths of normalized α\alpha-stable subordinators. The expectations of integrated functions of the tagged particle position are calculated for three types of routes.Comment: 23 page

    Transcriptional regulation of the urokinase receptor (u-PAR) - A central molecule of invasion and metastasis

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    The phenomenon of tumor-associated proteolysis has been acknowledged as a decisive step in the progression of cancer. This short review focuses on the urokinase receptor (u-PAR), a central molecule involved in tumor-associated invasion and metastasis, and summarizes the transcriptional regulation of u-PAR. The urokinase receptor (u-PAR) is a heavily glycosylated cell surface protein and binds the serine protease urokinase specifically and with high affinity. It consists of three similar cysteine-rich repeats and is anchored to the cell membrane via a GPI-anchor. The u-PAR gene comprises 7 exons and is located on chromosome 19q13. Transcriptional activation of the u-PAR promoter region can be induced by binding of transcription factors (Sp1, AP-1, AP-2, NF-kappaB). One current study gives an example for transcriptional downregulation of u-PAR through a PEA3/ets transcriptional silencing element. Knowledge of the molecular regulation of this molecule in tumor cells could be very important for diagnosis and therapy in the near future
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