Institution
York University
Education•Toronto, Ontario, Canada•
About: York University is a education organization based out in Toronto, Ontario, Canada. It is known for research contribution in the topics: Population & Poison control. The organization has 18899 authors who have published 43357 publications receiving 1568560 citations.
Topics: Population, Poison control, Large Hadron Collider, Politics, Galaxy
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors use an inductive, theory-building methodology to develop propositions regarding how effectuation processes are impacted when entrepreneurs adopt Twitter, and propose two factors that moderate the consequences of social interaction through Twitter.
650 citations
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TL;DR: The IllustrisTNG project as mentioned in this paper is a suite of cosmological magnetohydrodynamical simulations performed with the moving-mesh code AREPO employing an updated Illustris galaxy formation model.
Abstract: We introduce the IllustrisTNG project, a new suite of cosmological magnetohydrodynamical simulations performed with the moving-mesh code AREPO employing an updated Illustris galaxy formation model. Here we focus on the general properties of magnetic fields and the diffuse radio emission in galaxy clusters. Magnetic fields are prevalent in galaxies, and their build-up is closely linked to structure formation. We find that structure formation amplifies the initial seed fields ($10^{-14}$ comoving Gauss) to the values observed in low-redshift galaxies ($1-10\,\mu{\rm G}$). The magnetic field topology is closely connected to galaxy morphology such that irregular fields are hosted by early-type galaxies, while large-scale, ordered fields are present in disc galaxies. Using two simple models for the energy distribution of relativistic electrons we predict the diffuse radio emission of $280$ clusters with a baryonic mass resolution of $1.1\times 10^{7}\,{\rm M_{\odot}}$, and generate mock observations for VLA, LOFAR, ASKAP and SKA. Our simulated clusters show extended radio emission, whose detectability correlates with their virial mass. We reproduce the observed scaling relations between total radio power and X-ray emission, $M_{500}$, and the Sunyaev-Zel'dovich $Y_{\rm 500}$ parameter. The radio emission surface brightness profiles of our most massive clusters are in reasonable agreement with VLA measurements of Coma and Perseus. Finally, we discuss the fraction of detected extended radio haloes as a function of virial mass and source count functions for different instruments. Overall our results agree encouragingly well with observations, but a refined analysis requires a more sophisticated treatment of relativistic particles in large-scale galaxy formation simulations.
650 citations
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TL;DR: In this article, a critique of Porter and Kramer's concept of creating shared value is presented, namely, it is unoriginal, it ignores the tensions inherent to responsible business activity; it is naive about business compliance; and it is based on a shallow conception of the corporation's role in society.
Abstract: This article critiques Porter and Kramer's concept of creating shared value. The strengths of the idea are highlighted in terms of its popularity among practitioner and academic audiences, its connecting of strategy and social goals, and its systematizing of some previously underdeveloped, disconnected areas of research and practice. However, the concept suffers from some serious shortcomings, namely: it is unoriginal; it ignores the tensions inherent to responsible business activity; it is naive about business compliance; and it is based on a shallow conception of the corporation's role in society. [Michael Porter and Mark Kramer were invited to respond to this article. Their commentary follows along with a reply by Crane and his co-authors.]
650 citations
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TL;DR: In this article, a large sample of Main Sequence stars with 7-D measurements supplied by Gaia and SDSS was used to study the kinematic properties of the local stellar stellar halo.
Abstract: Using a large sample of Main Sequence stars with 7-D measurements supplied by Gaia and
SDSS, we study the kinematic properties of the local (within ∼10 kpc from the Sun) stellar
halo. We demonstrate that the halo’s velocity ellipsoid evolves strongly with metallicity.
At the low [Fe/H] end, the orbital anisotropy (the amount of motion in the radial direction
compared to the tangential one) is mildly radial with 0.2 < β < 0.4. However,
for stars with [Fe/H]> −1.7 we measure extreme values of β ∼ 0.9. Across the metallicity
range considered, i.e. −3 <[Fe/H]−1, the stellar halo’s spin is minimal, at the level of
20 < v¯θ(kms−1
) < 30. Using a suite of cosmological zoom-in simulations of halo formation,
we deduce that the observed acute anisotropy is inconsistent with the continuous accretion of
dwarf satellites. Instead, we argue, the stellar debris in the inner halo were deposited in a
major accretion event by a satellite with Mvir > 1010M⊙ around the epoch of the Galactic
disc formation, i.e. between 8 and 11 Gyr ago. The radical halo anisotropy is the result of the
dramatic radialisation of the massive progenitor’s orbit, amplified by the action of the growing
disc.
648 citations
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TL;DR: In this paper, the authors investigate the extent to which the Palomar-Green (PG) Bright Quasar Survey (BQS) is complete and representative of the general quasar population by comparing with imaging and spectroscopy from the Sloan Digital Sky Survey.
Abstract: We investigate the extent to which the Palomar-Green (PG) Bright Quasar Survey (BQS) is complete and representative of the general quasar population by comparing with imaging and spectroscopy from the Sloan Digital Sky Survey. A comparison of SDSS and PG photometry of both stars and quasars reveals the need to apply a color and magnitude recalibration to the PG data. Using the SDSS photometric catalog, we define the PG's parent sample of objects that are not main-sequence stars and simulate the selection of objects from this parent sample using the PG photometric criteria and errors. This simulation shows that the effective U-B cut in the PG survey is U-B 0.5 are inherently rare in bright surveys in any case). We find no evidence for any other systematic incompleteness when comparing the distributions in color, redshift, and FIRST radio properties of the BQS and a BQS-like subsample of the SDSS quasar sample. However, the application of a bright magnitude limit biases the BQS toward the inclusion of objects which are blue in g-i, in particular compared to the full range of g-i colors found among the i-band limited SDSS quasars, and even at i-band magnitudes comparable to those of the BQS objects.
643 citations
Authors
Showing all 19301 results
Name | H-index | Papers | Citations |
---|---|---|---|
Dan R. Littman | 157 | 426 | 107164 |
Martin J. Blaser | 147 | 820 | 104104 |
Aaron Dominguez | 147 | 1968 | 113224 |
Gregory R Snow | 147 | 1704 | 115677 |
Joseph E. LeDoux | 139 | 478 | 91500 |
Kenneth Bloom | 138 | 1958 | 110129 |
Osamu Jinnouchi | 135 | 885 | 86104 |
Steven A. Narod | 134 | 970 | 84638 |
David H. Barlow | 133 | 786 | 72730 |
Elliott Cheu | 133 | 1219 | 91305 |
Roger Moore | 132 | 1677 | 98402 |
Wendy Taylor | 131 | 1252 | 89457 |
Stephen P. Jackson | 131 | 372 | 76148 |
Flera Rizatdinova | 130 | 1242 | 89525 |
Sudhir Malik | 130 | 1669 | 98522 |