An unified formulation of strong non-local elasticity with fractional order calculus

The research of a formulation to model non-local interactions in the mechanical behavior of matter is currently an open problem. In this context, a strong non-local formulation based on fractional calculus is provided in this paper. This formulation is derived from an analogy with long-memory viscoelastic models. Specifically, the same kind of power-law time-dependent kernel used in Boltzmann integral of viscoelastic stress-strain relation is used as kernel in the Fredholm non-local relation. This non-local formulation leads to stress-strain relation based on the space Riesz integral and derivative of fractional order. For unbounded domain, proposed model can be defined in stress- and in strain-driven formulation and in both cases the stress–strain relation represent a strong non-local model. Also, the proposed strain driven and stress driven formulations defined in terms of Riesz operators are proved to be fully consistent each another. Moreover, the proposed model posses a mechanical meaning and for unbounded non-local rod is described and discussed in detail.

Making Authoritarian Environmentalism Accountable? Understanding China’s New Reforms on Environmental Governance

One of the key puzzles of authoritarian environmentalism is its dubious effectiveness due to fragmented interests among different political and market actors, which are often found undermining centrally crafted environmental regulations and targets. China recently launched a series of institutional reforms to fix its notorious local implementation gaps on environmental policies. By setting up a stringent central inspection system and holding frequent inquiry meetings with local government leaders, Beijing aims to reconfigure central–local power relations on environmental governance. We argue that these institutional reforms are essentially transforming environmental governance in China into a highly politicized task by enforcing party disciplines rather than legal frameworks. The aim is to rein environmental officers and hold local political leaders accountable. These reforms may significantly reduce local protectionism, yet such highly politicized approach based on coercive party rules and disciplines bears the risk of weakening the role of legal enforcement and can breed discontent among local officers. Consequently, how these new reforms can achieve a desirable central–local relation for addressing China’s environmental crisis in the long run is far from certain.

The present paper investigates the Hijazi Arabic (HA) morphosyntactic properties of the widely known linguistic phenomenon of sluicing from a generative perspective, taking into account the latest advancements of the Minimalist Approach (Chomsky 1995, 2000, 2001). In this paper, sluicing is a linguistic phenomenon of deleting an entire TP clause, leaving only a wh-remnant. Adopting the Structural PF-Deletion approach, we argue that HA employs sluicing and that the ellipsis site contains a fully-fledged syntactic structure that must be deleted at the PF level after the movement of the remnant to a higher CP. On a par with previous crosslinguistic ellipsis studies, the current study shows that ellipsis is permitted if and only if there is a specific head carrying some specific morphosyntactic properties occurring in a local relation to the ellipsis site. This specific head, with its morphosyntactic properties, licenses for the ellipsis phenomenon to occur. The head properties trigger the whword to move from its base-generated position to the specifier position of this particular head, i.e., Spec CP, and then delete all other constituents included within the TP.

The present paper investigates the Hijazi Arabic (HA) morphosyntactic properties of the widely known linguistic phenomenon of sluicing from a generative perspective, taking into account the latest advancements of the Minimalist Approach (Chomsky 1995, 2000, 2001). In this paper, sluicing is a linguistic phenomenon of deleting an entire TP clause, leaving only a wh-remnant. Adopting the Structural PF-Deletion approach, we argue that HA employs sluicing and that the ellipsis site contains a fully-fledged syntactic structure that must be deleted at the PF level after the movement of the remnant to a higher CP. On a par with previous crosslinguistic ellipsis studies, the current study shows that ellipsis is permitted if and only if there is a specific head carrying some specific morphosyntactic properties occurring in a local relation to the ellipsis site. This specific head, with its morphosyntactic properties, licenses for the ellipsis phenomenon to occur. The head properties trigger the whword to move from its base-generated position to the specifier position of this particular head, i.e., Spec CP, and then delete all other constituents included within the TP.

Subaru Hyper Suprime-Cam view of quasar host galaxies at z < 1

Active galactic nuclei (AGNs) are key in understanding the coevolution of galaxies and supermassive black holes (SMBHs). AGN activity is thought to affect the properties of their host galaxies via a process called “AGN feedback,” which drives the coevolution. From a parent sample of 1151 z &lt; 1 type-1 quasars from the Sloan Digital Sky Survey quasar catalog, we detected the host galaxies of 862 of them in the high-quality grizy images of the Subaru Hyper Suprime-Cam survey. The unprecedented combination of the survey area and depth allowed us to perform a statistical analysis of the quasar host galaxies, with small sample variance. We fitted the radial image profile of each quasar as a linear combination of the point spread function and the Sérsic function, decomposing the images into the quasar nucleus and the host galaxy components. We found that the host galaxies are massive, with stellar mass Mstar ≳ 1010 $M_\odot$, and are mainly located on the green valley. This trend is consistent with a scenario in which star formation in the host galaxies is suppressed by AGN feedback, that is, AGN activity may be responsible for the transition of these galaxies from the blue cloud to the red sequence. We also investigated the SMBH mass to stellar mass relation of the z &lt; 1 quasars, and found a consistent slope with the local relation, while the SMBHs may be slightly undermassive. However, the above results are subject to our sample selection, which biases against host galaxies with low masses and/or large quasar-to-host flux ratios.

Global Structure and Local Semantics-Preserved Embeddings for Entity Alignment

Entity alignment (EA) aims to identify entities located in different knowledge graphs (KGs) that refer to the same real-world object. To learn the entity representations, most EA approaches rely on either translation-based methods which capture the local relation semantics of entities or graph convolutional networks (GCNs), which exploit the global KG structure. Afterward, the aligned entities are identified based on their distances. In this paper, we propose to jointly leverage the global KG structure and entity-specific relational triples for better entity alignment. Specifically, a global structure and local semantics preserving network is proposed to learn entity representations in a coarse-to-fine manner. Experiments on several real-world datasets show that our method significantly outperforms other entity alignment approaches and achieves the new state-of-the-art performance.

The distribution and physical properties of high-redshift [Oiii] emitters in a cosmological hydrodynamics simulation

Atacama Large Millimeter/submillimeter Array (ALMA) has enabled us to detect [Oiii] 88 μm line even at z > 9. To study the properties of high-redshift [Oiii] emitters, we calculate [Oiii] luminosities of galaxies in a cosmological simulation by applying a physical model of Hii region and using the photoionization code cloudy. We find that the [Oiii] 88 μm luminosity, LOIII,88, scales with SFR with slightly larger LOIII,88 than a local relation. Some [Oiii] emitters have extended disk-like structure. We propose to use the ratio between [Oiii] 88 μm line and [Oiii] 5007 Å line, which can be detected with James Webb Space Telescope (JWST), to estimate the gas density and the metallicity in HII region of high-redshift [Oiii] emitters.

Properties of radio-loud quasars in the Sloan Digital Sky Survey

We present a study of a sample of 223 radio-loud quasars (up to redshift < 0.3) in order to investigate their spectral properties. Twenty-six of these radio-loud quasars are identified as flat-spectrum radio quasars (FSRQs), and 54 are identified as steep-spectrum radio quasars (SSRQs) based on their radio spectral index. We study the [O III] line properties of these quasars to investigate the origin and properties of blue wings (shift of the profile toward lower wavelengths) and blue outliers (shift of the whole spectroscopic feature). Most of the quasars show blue wings with velocities of up to 420 km s−1. We find that about 17% of the quasars show outliers whose velocities span from 419 to −315 km s−1. Finally, we revisit the MBH − σ relation of our sample using the [S II]λ 6716,6731 and [O III] line widths as surrogates for stellar velocity dispersions, σ, to investigate their location on the MBH − σ relation for quiescent galaxies. Because [S II] is strongly blended with Hα, we were able to estimate σ[S II] for only 123 quasars. We find that the radio-loud quasars do not show a relationship between MBH and σ[S II]/[O III] up to a redshift of 0.3, although they cluster around the local relation. We find an overall offset of 0.12 ± 0.05 dex of our sample of radio-loud quasars from the MBH − σ relation of quiescent galaxies. Quasars in our highest redshift bin (z = 0.25 − 0.3) show a deviation of ∼0.33 ± 0.06 dex from the local relation. Implications of the results are discussed.