1,002 research outputs found

    Transversality of the logarithmic divergences in the Classical Finite Temperature SU(N) Self-Energy

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    We show that the logarithmic divergences that appear in the classical approximation of the finite temperature SU(N) self-energy are transverse. We use the Ward identities in linear gauges and the fact that the superficial degree of divergence d of a classical diagram only depends on the number of loops l via d=2-l. We comment on the relevance of this result to the construction of a low-energy effective theory beyond HTLs.Comment: 5 pages, 1 figure, REVTE

    Temperature Dependence of the QCD Coupling

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    We present a one-loop calculation of a gauge invariant QCD beta function. Using both momentum and temperature renormalization group equations we investigate the running coupling in the magnetic sector as a function of temperature and momentum scale. At fixed momentum scale we find that, in contrast to λϕ4\lambda\phi^4 or QED, high-temperature QCD is strongly coupled, even after renormalization group improvement. However, if the momentum scale is changed simultaneously with temperature in a specified manner, the coupling decreases. We also point out in what regime dimensional reduction occurs. Both the cases NfN_f smaller and larger than 112Nc\frac{11}{2} N_c are discussed.Comment: 10 pages, LaTeX (5 postscript figures available), ITFA-93-11,THU-93/0

    Dutch health websites and their ability to inform people with low health literacy

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    Objective To evaluate whether Dutch online health information (OHI) generally reflects message elements that support information processing and understanding among people with low health literacy. Methods We content-analyzed one hundred Dutch webpages about Ebola, fibromyalgia, ALS, losing weight, borderline personality disorder, hemorrhoids, ADD, bladder infection, shingles, and chicken pox. The codebook covered the following domains: images and videos, readability level, Suitability Assessment of Materials (SAM), advertising, interactive features, and reliability cues. Results Thirty-seven webpages contained informative images that visualized the text. Twelve webpages incorporated videos, six of which were animations. Readability varied widely, but 79.2% of the texts exceeded the recommended B1 level. Half of the webpages had inadequate SAM scores; five were classified as superior. Interactive features were infrequently used. Many webpages included only a few elements that help users evaluate the reliability of OHI. Four presented a quality label. Conclusion Over a wide range of health-related topics, Dutch OHI does not generally contain message elements that improve information processing among people with low health literacy. Practice implications Communication professionals should make better use of digital message features. Videos, narration, and interactivity are scarcely used but can be valuable for people with low health literacy
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