A Novel Location Free Link Prediction in Multiplex Social Networks

In recent decades, the emergence of social networks has enabled internet service providers (e.g., Facebook, Twitter and Uber) to achieve great commercial success. Link prediction is recognized as a common practice to build the topology of social networks and keep them evolving. Conventionally, link prediction methods are dependent of location information of users, which suffers from information leakage from time to time. To deal with this problem, companies of smart devices (e.g., Apple Inc.) keeps tightening their privacy policy, impeding internet service providers from acquiring location information. Therefore, it is of great importance to design location free link prediction methods, while the accuracy still preserves. In this study, a novel location free link prediction method is proposed for complex social networks. Experiments on real datasets show that the precision of our location free link prediction method increases by 10 percent

(E)-3-[4-(Diphenyl­amino)­phen­yl]-1-(pyridin-2-yl)prop-2-en-1-one

The title compound, C26H20N2O, belongs to a new family of organic two-photon absorption materials with triphenyl­amine and pyridine units. In the mol­ecule, the three benzene rings are arranged in a propeller-like fashion; the dihedral angles between the rings are 80.01 (14), 75.68 (13) and 56.93 (14)°. The pyridine ring is oriented at dihedral angles of 56.24 (14), 48.92 (15) and 22.02 (13)° with respect to the three benzene rings. Weak inter­molecular C—H⋯O hydrogen bonding is present in the crystal structure

Effects of magnetic field on thermo-hydraulic performance of Fe3O4-water nanofluids in a corrugated tube

© 2018 Elsevier Ltd An experimental system is established to investigate the thermo-hydraulic performance of Fe3O4-water nanofluids in a corrugated tube under various magnetic fields. The influences of magnetic induction intensities (B = 0 G, 100 G, 200 G, 300 G), nanoparticle mass fractions (ω = 0.0%, 0.1%, 0.3%, 0.5%), electromagnet arrangement modes (one-side electromagnet and two-side staggered electromagnet), kinds of tubes (smooth tube and corrugated tube), Reynolds numbers (Re = 800–12,000) on flow and heat transfer characteristics are discussed. It is obtained that the augmentation of heat transfer is more sensitive to high nanoparticle mass fraction, high magnetic induction intensity, two-side staggered electromagnet and corrugated tube. A Comprehensive evaluation index is applied to estimate the thermo-hydraulic performance. It can be discovered that the comprehensive evaluation index increases with the increasing Reynolds number at first and then decreases, and the rough surface of corrugated tube delays the appearance of critical Reynolds number

Antiproliferative withanolides from several Solanaceous species

This is an Accepted Manuscript of an article published by Taylor & Francis in Natural Product Research in November 2014, available online: http://www.tandfonline.com/10.1080/14786419.2014.919286.To date, our work on Solanaceous species (Datura wrightii, Jaborosa caulescens, Physalis hispida, P. longifolia, Vassobia breviflora, and Withania somnifera) has resulted in the isolation of 65 withanolides, 31 of which were new, as well as the semi-synthesis of a further 30 withanolides. Structure identification and MTS assay-based antiproliferative evaluation of these 95 compounds revealed that a Δ2-1-oxo functionality in ring A; in conjunction with either a 5β,6β-epoxy or 5α-chloro-6β-hydroxy moiety in ring B; are the minimum structural requirements for withanolides to produce potent cytotoxic activity. Such structural-activity relationship analysis (SARA) also revealed that oxygenation (the –OH or –OR groups) at C-4, 7, 11, and 12; as well as C-14 to C-28; did not contribute toward the observed antiproliferative activity. Herein we present a complete overview of our work as it relates to the withanolides reported from 1965 to 2013

4-{2-[5-(3,5-Difluoro­phen­yl)-2-methyl­thio­phen-3-yl]-3,3,4,4,5,5-hexa­fluoro­cyclo­pent-1-en-1-yl}-1,5-dimethyl­pyrrole-2-carbonitrile

In the title compound, C23H14F8N2S, the dihedral angles between the pyrrole and thio­phene groups and the almost planar C—C=C—C unit of the cyclo­pentene ring (r.m.s. deviation = 0.4193 Å) are 43.6 (5) and 50.1 (2)°, respectively. The distance of 3.612 (3) Å between the potentially reactive C atoms of the two heteroaryl substituents is short enough to enable a photocyclization reaction