Long Island University

About: Long Island University is a education organization based out in Brookville, New York, United States. It is known for research contribution in the topics: Population & Context (language use). The organization has 2647 authors who have published 4924 publications receiving 108757 citations.

How to Use Search Engine Optimization Techniques to Increase Website Visibility

Abstract: Research questions: This tutorial aims to answer two general questions: (1) What contributes to search engine rankings? and (2) What can web content creators and webmasters do to make their content and sites easier to find by audiences using search engines? Key concepts: Search engines' rankings are shaped by three classes of participants: search engine companies and programmers, search engine optimization practitioners, and search engine users. Key lessons: By applying three key lessons, professional communicators can make it easier for audiences to find their web content through search engines: (1) consider their web content's audiences and website's competitors when analyzing keywords; (2) insert keywords into web text that will appear on search engine results pages, and (3) involve their web content and websites with other web content creators. Implications: Because successful search engine optimization requires considerable time, professional communicators should progressively apply these lessons in the sequence presented in this tutorial and should keep up to date with frequently changing ranking algorithms and with the associated changing practices of search optimization professionals.

Profiles of social relations among older adults: a cross-cultural approach

Abstract: This study extends previous research on the profiles of social relations in three ways: (1) by including both functional and qualitative characteristics of social relations; (2) by examining the association of these profiles with mental and physical health and mortality; and (3) by exploring these profiles and associations in two cultures. Using samples of approximately 500 adults aged 60 or more years from the Social Relations and Mental Health over the Life Course studies in both the United States and Japan, separate cluster analyses were conducted for each country. The common or shared network types were labelled ‘diverse’, ‘restricted’, ‘friend-focused’ and ‘family-focused’, but in the US we found two types of ‘friend-focused’ networks (supported and unsupported) and two types of ‘restricted’ networks (structurally- and functionally-restricted). In addition, we found a unique network type in Japan: ‘married and distal’. Multivariate analyses of variance and Cox regressions revealed that whereas individuals in the functionally restricted network type had the worse physical and mental health in the US, Americans in the structurally-restricted network type had the lowest survival rates at a 12-year follow-up. Interestingly, there were no wellbeing differences by network type in Japan. The findings have been interpreted in the light of social relations theories, with special emphasis on the importance of taking a multidimensional perspective and exploring cultural variation.

Alterations in Two-Component Regulatory Systems of phoPQ and pmrAB Are Associated with Polymyxin B Resistance in Clinical Isolates of Pseudomonas aeruginosa

Abstract: Polymyxins are often the only option to treat acquired multidrug-resistant Pseudomonas aeruginosa. Polymyxin susceptibility in P. aeruginosa PAO1 is associated with the lipopolysaccharide structure that is determined by arnBCADTEF and modulated by phoPQ and pmrAB. We examined five clonally unrelated clinical isolates of polymyxin B-resistant P. aeruginosa to investigate the molecular basis of polymyxin resistance. All isolates grew with 4 microg/ml polymyxin B (MIC, 8 microg/ml), whereas P. aeruginosa PAO1 grew with 0.25 mug/ml polymyxin B (MIC, 0.5 microg/ml). The resistant isolates were converted to susceptible ones (the MICs fell from 8 to 0.5 microg/ml) following the introduction of phoPQ (four isolates) and pmrAB (one isolate), which had been cloned from strain PAO1. DNA sequence analysis revealed that a single-nucleotide substitution in three isolates replaced a single amino acid of PhoQ, the deletion of 17 nucleotides in one isolate truncated the protein of PhoQ, and two nucleotide substitutions in one isolate replaced two amino acids of PmrB. The involvement of these amino acid substitutions or the truncated protein of PhoQ and PmrB in polymyxin B resistance was confirmed using strain PAO1 lacking phoPQ or pmrAB that was transformed by phoPQ or pmrAB containing the amino acid substitutions or the truncated protein. The resistant clinical isolates were sensitized by the inactivation of arnBCADTEF (the MICs fell from 8 to 0.5 microg/ml). These results suggest that polymyxin B resistance among clinical isolates of P. aeruginosa is associated with alterations in two-component regulatory systems of phoPQ or pmrAB.

arXiv : Gravitational Wave Signatures of Highly Compact Boson Star Binaries

Abstract: Solitonic boson stars are stable objects made of a complex scalar field with a compactness that can reach values comparable to that of neutron stars. A recent study of the collision of identical boson stars produced only nonrotating boson stars or black holes, suggesting that rotating boson stars may not form from binary mergers. Here we extend this study to include an analysis of the gravitational waves radiated during the coalescence of such a binary, which is crucial to distinguish these events from other binaries with LIGO and Virgo observations. Our studies reveal that the remnant's gravitational wave signature is mainly governed by its fundamental frequency as it settles down to a nonrotating boson star, emitting significant gravitational radiation during this post-merger state. We calculate how the waveforms and their post-merger frequencies depend on the compactness of the initial boson stars and estimate analytically the amount of energy radiated after the merger.