1,372 research outputs found

    Embedding, quoting, or paraphrasing? Investigating the effects of political leaders' tweets in online news articles:The case of Donald Trump

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    Journalists frequently turn to Twitter for quotes from elite and non-elite sources to include within their online news articles. While recent research has found that including posts from ordinary people can influence news consumers' issue perceptions, there is limited research on the impact of including politicians' posts. We conduct two similar survey experiments, with Republican and Democrat respondents, to test the relative impact of including Donald Trump's tweets in a news article either in embedded format, quoted in plain text, or quoted in paraphrased format. Among Republicans, embedded tweets were unique in eliciting positive emotions which mediated higher ratings of Donald Trump's warmth and competence. Among Democrats, no significant differences were elicited by tweet format on perceptions of Trump. However, Democrats rated articles containing verbatim Trump tweets as significantly lower in journalistic quality. Results are discussed in relevance to journalist-politician power relations and perceptions of journalistic quality

    Polaron to molecule transition in a strongly imbalanced Fermi gas

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    A single down spin Fermion with an attractive, zero range interaction with a Fermi sea of up-spin Fermions forms a polaronic quasiparticle. The associated quasiparticle weight vanishes beyond a critical strength of the attractive interaction, where a many-body bound state is formed. From a variational wavefunction in the molecular limit, we determine the critical value for the polaron to molecule transition. The value agrees well with the diagrammatic Monte Carlo results of Prokof'ev and Svistunov and is consistent with recent rf-spectroscopy measurements of the quasiparticle weight by Schirotzek et. al. In addition, we calculate the contact coefficient of the strongly imbalanced gas, using the adiabatic theorem of Tan and discuss the implications of the polaron to molecule transition for the phase diagram of the attractive Fermi gas at finite imbalance.Comment: 10 pages, 4 figures, RevTex4, minor changes, references adde

    Secondary giant cell glioblastoma in a multiple drug abuser - simple association or ethiopathogenic correlation? Case presentation and literature review

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    Experimental investigations have shown that drug abuse initiates a cascade of pathophysiological events including toxic and hypoxic-ischemic injury on neurons, microglia and astrocytes, which finally lead to widespread disturbances in the brain. There are many reports about the psychiatric and neurologic effects of multiple drug abuse, but only a few clinical studies reporting possible correlation between recreational illicit drugs and gliomas. In this paper we present the case of a 40 years-old male patient, with a long history (almost ten years) of multiple drug abuse, including cocaine, heroin, marijuana, ethnobotanical drugs and nicotine, who was diagnosed and surgically treated for a supratentorial secondary giant cell glioblastoma (sgcGB) developed in a diffuse astrocytoma NOS. Depending on the type of the illicit drug used by the patient and the moment of life he used them, the morphological features identified in the histological samples of our patient confirmed the gliomagenesis effect of chronic multiple drug abuse, but also its inhibitory effects on tumour cells growth. This was due to the fact that although the tumour was large in size and caused brain sub-falcine herniation, the patient reported the onset of seizures only late in the evolution. In conclusion, the diagnosis of a brain tumour should take into consideration not only patient's clinical and imaging data, but also his lifestyle, especially his addiction to recreational drugs

    Parity Mixed Doublets in A = 36 Nuclei

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    The γ\gamma-circular polarizations (PγP_{\gamma}) and asymmetries (AγA_{\gamma}) of the parity forbidden M1 + E2 γ\gamma-decays: 36Cl∗(Jπ=2−;T=1;Ex=1.95^{36}Cl^{\ast} (J^{\pi} = 2^{-}; T = 1; E_{x} = 1.95 MeV) →\rightarrow 36Cl(Jπ=2+;T=1;g.s.)^{36}Cl (J^{\pi} = 2^{+}; T = 1; g.s.) and 36Ar∗(Jπ=2−;T=0;Ex=4.97^{36}Ar^{\ast} (J^{\pi} = 2^{-}; T = 0; E_{x} = 4.97 MeV) →\rightarrow 36Ar∗(Jπ=2+;T=0;Ex=1.97^{36}Ar^{\ast} (J^{\pi} = 2^{+}; T = 0; E_{x} = 1.97 MeV) are investigated theoretically. We use the recently proposed Warburton-Becker-Brown shell-model interaction. For the weak forces we discuss comparatively different weak interaction models based on different assumptions for evaluating the weak meson-hadron coupling constants. The results determine a range of PγP_{\gamma} values from which we find the most probable values: PγP_{\gamma} = 1.1⋅10−41.1 \cdot 10^{-4} for 36Cl^{36}Cl and PγP_{\gamma} = 3.5⋅10−43.5 \cdot 10^{-4} for 36Ar^{36}Ar.Comment: RevTeX, 17 pages; to appear in Phys. Rev.

    Nonverbal Communication in Politics: A Review of Research Developments, 2005-2015

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    This article reviews research contributions in political science and communication to the topic of nonverbal communication and politics from 2005 to 2015. The review opens with research on the content of nonverbal communication, then considers studies examining what moderates the impact of nonverbal aspects of political messages on attitudes and behavior and the mechanisms that underpin these effects. Over the period reviewed here, research shows that the nonverbal channel is rich in political information and is consequential for political decision making, particularly under certain circumstances, such as in low-information conditions. Visuals affect political decisions through cognitive and emotional routes. This review article also identifies several directions where further research is required, particularly with regard to social media, nonvisual aspects of nonverbal communication, the interplay of visual and verbal arguments, and the mechanisms behind the effects of nonverbal communication

    A Categorical Equivalence between Generalized Holonomy Maps on a Connected Manifold and Principal Connections on Bundles over that Manifold

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    A classic result in the foundations of Yang-Mills theory, due to J. W. Barrett ["Holonomy and Path Structures in General Relativity and Yang-Mills Theory." Int. J. Th. Phys. 30(9), (1991)], establishes that given a "generalized" holonomy map from the space of piece-wise smooth, closed curves based at some point of a manifold to a Lie group, there exists a principal bundle with that group as structure group and a principal connection on that bundle such that the holonomy map corresponds to the holonomies of that connection. Barrett also provided one sense in which this "recovery theorem" yields a unique bundle, up to isomorphism. Here we show that something stronger is true: with an appropriate definition of isomorphism between generalized holonomy maps, there is an equivalence of categories between the category whose objects are generalized holonomy maps on a smooth, connected manifold and whose arrows are holonomy isomorphisms, and the category whose objects are principal connections on principal bundles over a smooth, connected manifold. This result clarifies, and somewhat improves upon, the sense of "unique recovery" in Barrett's theorems; it also makes precise a sense in which there is no loss of structure involved in moving from a principal bundle formulation of Yang-Mills theory to a holonomy, or "loop", formulation.Comment: 20 page
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