101,292 research outputs found

    Testing Hu-Sawicki f(R) gravity with the effective field theory approach

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    We show how to fully map a specific model of modified gravity into the Einstein-Boltzmann solver eftcamb. This approach consists in few steps and allows to obtain the cosmological phenomenology of a model with minimal effort. We discuss all these steps, from the solution of the dynamical equations for the cosmological background of the model to the use of the mapping relations to cast the model into the effective field theory language and use the latter to solve for perturbations. We choose the Hu-Sawicki f(R) model of gravity as our working example. After solving the background and performing the mapping, we interface the algorithm with eftcamb and take advantage of the effective field theory framework to integrate the full dynamics of linear perturbations, returning all quantities needed to accurately compare the model with observations. We discuss some observational signatures of this model, focusing on the linear growth of cosmic structures. In particular we present the behaviour of fσ8and EG that, unlike the Λ cold dark matter (ΛCDM) scenario, are generally scale dependent in addition to redshift dependent. Finally, we study the observational implications of the model by comparing its cosmological predictions to the Planck 2015 data, including cosmic microwave background lensing, the WiggleZ galaxy survey and the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS), weak-lensing survey measurements. We find that while WiggleZ data favour a non-vanishing value of the Hu-Sawicki model parameter, log10(-fR0, and consequently a large value of σ8, CFHTLenS drags the estimate of log10(-fR0back to the ΛCDM limit

    Stenus absconditor Hu & Tang

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    <i>Stenus absconditor</i> Hu & Tang, nomen nov. <p> <i>Stenus absconditus</i> Hu & Tang, 2018: 347.</p> <p> <b>Etymology.</b> The specific name “absconditor” means hidden.</p>Published as part of <i>Hu, Cheng-Zhi & Tang, Liang, 2019, A new name for Stenus absconditus Tang & Hu, 2018 (Coleoptera, Staphylinidae), pp. 443 in Zootaxa 4545 (3)</i> on page 443, DOI: 10.11646/zootaxa.4545.3.9, <a href="http://zenodo.org/record/2619006">http://zenodo.org/record/2619006</a&gt

    Hu, B

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    Hu, B

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    Nazeris biwenxuani Hu & Li 2016

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    <i>Nazeris biwenxuani</i> Hu & Li, 2016 (Fig. 7) <p> <b>Additional material examined. China: Xizang,</b> 2 males, 4 females, 'Bomi, 12.III.2017, Xiao-Bin Song leg.' (SNUC).</p> <p> <b>Comment.</b> The species is similar to <i>N. motuensis</i> Hu, Li & Zhao, 2008 in general appearance and separated by the much narrower apical excision of ventral process of aedeagus and much longer dorso-lateral apophyses.</p> <p> <b>Distribution and habitat data.</b> The species is known only from Bomi in east Xizang (Fig. 7). The specimens were collected by sifting decaying leaf litter in mixed forests at an altitude of 2600 m.</p>Published as part of <i>Hu, Jia-Yao & Pan, Zhao-Hui, 2018, New data of Nazeris Fauvel in Xizang, China (Coleoptera, Staphylinidae, Paederinae), pp. 147-150 in Zootaxa 4531 (1)</i> on page 147, DOI: 10.11646/zootaxa.4531.1.11, <a href="http://zenodo.org/record/2614370">http://zenodo.org/record/2614370</a&gt

    Correlation between neutralising antibody titres against vaccine (Wuhan-hu-1) and VOCs.

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    Antibody responses measured by pseudotype-based neutralisation assay against Wuhan-hu-1 were compared with those against B.1.617.1, B.1.617.2 and B.1.351. Responses were compared for A) BNT162b2 1 dose, B) BNT162b2 2 doses, C) ChAdOx1 1 dose and D) ChAdOx1 2 doses. Correlations between groups were evaluated and non-parametric Spearman correlation coefficients calculated using GraphPad Prism version 8. (DOCX)</p

    Responses to axonal current injection in cortical layer 5 pyramidal neurons

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    Patch-clamp recordings in cortical layer 5 pyramidal neurons performed by Wenqin Hu. A current pulse is either injected in the soma or in an axonal bleb and recorded simultaneously in the axonal bleb or the soma, respectively. The data are related to figure 7 of the paper: Hu, W., & Bean, B. P. (2018). Differential control of axonal and somatic resting potential by voltage-dependent conductances in cortical layer 5 pyramidal neurons. Neuron, 97(6), 1315-1326.  </p
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