646 research outputs found
Unveiling Coordinated Groups Behind White Helmets Disinformation
Propaganda, disinformation, manipulation, and polarization are the modern
illnesses of a society increasingly dependent on social media as a source of
news. In this paper, we explore the disinformation campaign, sponsored by
Russia and allies, against the Syria Civil Defense (a.k.a. the White Helmets).
We unveil coordinated groups using automatic retweets and content duplication
to promote narratives and/or accounts. The results also reveal distinct
promoting strategies, ranging from the small groups sharing the exact same text
repeatedly, to complex "news website factories" where dozens of accounts
synchronously spread the same news from multiple sites.Comment: To be presented at WWW 2020 Workshop on Computational Methods in
Online Misbehavior and forthcoming in the Companion Proceedings of the Web
Conference 202
Isovector Giant Dipole Resonance from the 3D Time-Dependent Density Functional Theory for Superfluid Nuclei
A fully symmetry unrestricted Time-Dependent Density Functional Theory
extended to include pairing correlations is used to calculate properties of the
isovector giant dipole resonances of the deformed open-shell nuclei 172Yb
(axially deformed), 188Os (triaxially deformed), and 238U (axially deformed),
and to demonstrate good agreement with experimental data on nuclear
photo-absorption cross-sections for two different Skyrme force parametrizations
of the energy density functional: SkP and SLy4.Comment: 5 pages, 3 figures, published versio
Effect of diet versus diet and exercise on weight loss and body composition in class II and III obesity: A systematic review
Class II and III obesity (BMI >35 kg·m2) have increased dramatically in recent years. Current clinical guidelines suggest diet and exercise as first line treatment for adults throughout the spectrum of overweight and obesity. However, to date there is no systematic review that examines the effects of diet and exercise on this high risk population. This systematic review will examine the combined effects of diet versus diet and exercise on body composition in severe obesity. Medline and Cinahl were searched for randomised controlled trials comparing diet and exercise to diet alone. Studies published until July 2013 were included if they used reliable methods for analysing body composition in adults with BMI ≥ 35 kg·m2. Five of 459 studies met the inclusion criteria. Two studies, both in older adults, reported that exercise reduced lean mass loss during weight loss. Two studies showed that exercise facilitated (greater) fat mass loss. The remaining study reported no differences in body composition when exercise is added to energy restriction. Exercise training during energy restriction for individuals with BMI ≥35 kg.m2 may influence body composition outcomes but the evidence is limited. Further studies should focus on the efficacy of different exercise protocols during energy restriction for this population in order to better inform decision making for the treatment of severe obesity in respect to favourable body composition outcomes
Deuteron tensor polarization component T_20(Q^2) as a crucial test for deuteron wave functions
The deuteron tensor polarization component T_20(Q^2) is calculated by
relativistic Hamiltonian dynamics approach. It is shown that in the range of
momentum transfers available in to-day experiments, relativistic effects, meson
exchange currents and the choice of nucleon electromagnetic form factors almost
do not influence the value of T_20(Q^2). At the same time, this value depends
strongly on the actual form of the deuteron wave function, that is on the model
of NN-interaction in deuteron. So the existing data for T_20(Q^2) provide a
crucial test for deuteron wave functions.Comment: 11 pages, 3 figure
Undercarboxylated Osteocalcin: Experimental and Human Evidence for a Role in Glucose Homeostasis and Muscle Regulation of Insulin Sensitivity
Recent advances have indicated that osteocalcin, and in particular its undercarboxylated form (ucOC), is not only a nutritional biomarker reflective of vitamin K status and an indicator of bone health but also an active hormone that mediates glucose metabolism in experimental studies. This work has been supported by the putative identification of G protein-coupled receptor, class C, group 6, member A (GPRC6A) as a cell surface receptor for ucOC. Of note, ucOC has been associated with diabetes and with cardiovascular risk in epidemiological studies, consistent with a pathophysiological role for ucOC in vivo. Limitations of existing knowledge include uncertainty regarding the underlying mechanisms by which ucOC interacts with GPRC6A to modulate metabolic and cardiovascular outcomes, technical issues with commonly used assays for ucOC in serum, and a paucity of clinical trials to prove causation and illuminate the scope for novel health interventions. A key emerging area of research is the role of ucOC in relation to expression of GPRC6A in muscle, and whether exercise interventions may modulate metabolic outcomes favorably in part via ucOC. Further research is warranted to clarify potential direct and indirect roles for ucOC in human health and cardiometabolic diseases
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