112 research outputs found
Vermo-nos, vendo os outros: investigação comparativa de notícias televisivas
Acaba de passar várias horas num avião e, finalmente, deu entrada num hotel num país distante. Se agir como eu, uma das primeiras coisas que fará após pousar a bagagem será ligar a televisão e começar a percorrer os canais. Mais tarde ou mais cedo, começará a passar por um e outro noticiário. E, mesmo que não domine o idioma, ficará convicto de estar a ver as notícias. As notícias televisivas constituem, seguramente, um fenómeno global. De facto, desde o advento da televisão, em meados do século XX, que as notícias constituem um dos seus mais primitivos géneros de conteúdo. E, no entanto, o processo de produção, as tecnologias, os valores jornalísticos e a sofisticação das audiências por todo o mundo têm sofrido constantes avanços e alterações. Consideremos ou não as notícias televisivas como sendo um meio útil de providenciar informação sobre aquilo que se passa a nível local ou mundial, não há dúvida de que a TV constitui ainda a principal fonte de informação para a maioria das pessoas, mesmo com o crescente aumento do número de utilizadores da internet. Inúmeros formatos de noticiários televisivos evoluíram ao longo dos anos: serviços públicos e comerciais; locais e nacionais; gerais e centrados em tópicos específicos (ex: negócios, desporto, etc.); breves boletins informativos e transmissões non-stop de 24 horas diárias. No entanto, não obstante esta variedade, sempre existiram pontos em comum entre todos os formatos, sobretudo se procedermos a uma análise individual de peças noticiosas
The Television News Interview
It is not a traditional textbook that tries to each interviewing in a “how to do it” sense. It is instead an insightful study of interviewing which provides essential background and understanding for students, researches and the press
Does News Platform Matter? Comparing Online Journalistic Role Performance to Newspaper, Radio, and Television
The shifting role of journalism in a digital age has affected long-standing journalistic norms across media platforms. This has reinvigorated discussion on how work in online newsrooms compares to other platforms that differ in media affordances and forms. Still, more studies are needed on whether those differences translate into distinct practices, especially when examining cross-national studies. Based on a content analysis of 148,474 stories produced by 365 media organizations from 37 countries, this article compares the performance of journalistic roles in online newsrooms to three other types of media—TV, radio, and print. The paper analyzes if journalistic roles present themselves differently across platforms, and if these differences are constant or they vary across countries. Results show that there are measurable differences in role performance in online journalism compared to other platforms. Platform had a significant impact, particularly in terms of service and infotainment orientation, while the implementation of roles oriented toward public service was more similar. Additionally, country differences in the relationship between role performance and platforms mainly emerged for roles that enable political influence on news coverage, with differences in the relationship between online vs. traditional platforms appearing to be distinct features of the specific political system. © 2023 Informa UK Limited, trading as Taylor & Francis Group
Light Composite Vector Bosons
In gauge theories with slowly-running coupling constants, it may be possible
for four-fermion operators to be nearly marginal. Such operators can possess
asymptotically weak couplings, and can plausibly give rise to light composite
vector mesons.Comment: 16 pages (TeX w/epsf), 4 figures (uuencoded) included,
CERN-TH.6767/9
IFNAR1-Signalling Obstructs ICOS-mediated Humoral Immunity during Non-lethal Blood-Stage Plasmodium Infection
Funding: This work was funded by a Career Development Fellowship (1028634) and a project grant (GRNT1028641) awarded to AHa by the Australian National Health & Medical Research Council (NHMRC). IS was supported by The University of Queensland Centennial and IPRS Scholarships. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewedPublisher PD
Goldstone Bosons in the Appelquist-Terning ETC Model
It is demonstrated that the extended technicolor model proposed recently by
Appelquist and Terning has pair of potentially light Goldstone bosons
coupling to ordinary matter with strength , where is
the mass of the fermion and F_{\pi} \approx 125\,\GeV. These Goldstone bosons
could get a mass if the spontaneously broken symmetries are also
explicitly broken, by physics beyond that specified in the model. An attempt to
break these symmetries by embedding the model into a larger gauge group seems
to be inadequate. The problem is because there are too many representations and
there is a mismatch between the number of condensates and the number of gauge
symmetries broken.Comment: 14 pages, uses harvmac, to be published in Phys. Rev.
Sphaleron transitions in the Minimal Standard Model and the upper bound for the Higgs Mass
We calculate the dissipation of the baryon number after the electroweak phase
transition due to thermal fluctuations above the sphaleron barrier. We consider
not only the classical Boltzmann factor but also fermionic and bosonic one-loop
contributions. We find that both bosonic and especially fermionic fluctuations
can considerably suppress the transition rate. Assuming the Langer--Affleck
formalism for this rate, the condition that an initial baryon asymmetry must
not be washed out by sphaleron transitions leads, in the Minimal Standard Model
(), to an upper bound for the Higgs mass in the range 60 to 75
GeV.Comment: 49 pages, 5 figures (uuencoded PostScript); fixing of the
renormalization scale has been improved, numerics has been extende
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Exclusive J/ψ detection and physics with ECCE
The file available on this institutional repository is an arXiv preprint which may not have been certified by peer review. The definitive version of record published by Elsevier is available at https://doi.org/10.48550/arXiv.2207.10356.Copyright © The Authors 2023. The EIC Comprehensive Chromodynamics Experiment (ECCE) detector has been recommended as a reference design for the proposed Electron-Ion Collider (EIC) program. This paper presents simulation studies of exclusive J/ψ detection and selected physics impact results in EIC using the projected ECCE detector concept. Exclusive quarkonium photoproduction is one of the most popular processes in EIC, which has a large cross section and a simple final state. Due to the gluonic nature of the exchange Pomeron, this process can be related to the gluon distributions in the nucleus. Preliminary results estimate the excellent statistics benefited from the large cross section of J/ψ photoproduction and superior performance of ECCE detector concept. The precise measurement of exclusive J/ψ photoproduction at EIC will help us to more deeply understand nuclear gluon distributions, near threshold production mechanism and nucleon mass structure.X. Li and W. Zha are supported by the National Natural Science Foundation of China (12005220, 12175223) and MOST (2018YFE0104900). The authors would like to thank the ECCE Consortium for performing a full simulation of their detector design, for providing up-to-date information on EIC run conditions, and for suggestions and comments on the manuscript. X. Li and W. Zha would like to thank Y. Zhou for useful suggestions and discussions related to this analysis.
W. Zha is supported by Anhui Provincial Natural Science Foundation No. 2208085J23 and Youth Innovation Promotion Association of Chinese Academy of Sciences.
AANL group are supported by the Science Committee of RA , in the frames of the research project
21AG-1C028
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