Media Uses and Gratifications

Reinhard, CarrieLynn D.; Dervin, Brenda

doi:10.4135/9781412964005.n56

Cited by 9 publications

(11 citation statements)

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“…Based on the version of microscopic models and experimental GMR energies for 40 Ca, 90 Zr and 208 Pb nuclei available in the 1970's, Blaizot et al [17] obtained a value of K 0 which has been accepted as standard for many years. Their approach was to use each of the five effective interactions B1, D1, Ska, SIV and SIII to calculate K 0 in nuclear matter and also, with the HF+RPA model, the GMR energies of these nuclei.…”

Section: Microscopic Modelsmentioning

confidence: 99%

“…We discarded 40 Ca since it has become apparent that GMR strength is fragmented in lighter nuclei and the nature of collectivity may be different in light and heavy nuclei [52] and have added 116 Sn. Of the five interactions used by Blaizot et al, we retained four SIII, SIV, Ska and D1 but have discarded B1, since is not density dependent and seriously under-binds 16 O, 40 Ca, 90 Zr and 208 Pb (by 27-, 78-, 186-and 445 MeV, respectively). To these we have added SGII, SkP and SKT5 which all have low incompressibility and also we used the KDE0v1 force [86], one of the five Skyrme forces that passed all the constraints currently available on nuclear matter [1].…”

Section: Microscopic Modelsmentioning

confidence: 99%

“…The first (to our knowledge) use of experimental data on GMR energies, in 40 Ca, 90 Zr and 208 Pb, taken from an unpublished report by Marty et al [16], was performed by Blaizot et al [17] who determined K 0 = (210 ± 30) MeV. They used theoretical values of K 0 calculated with B1 [5], D1 [8], Ska [9] and SIII and SIV [7] effective forces in a Hartree-Fock + RPA model.…”

Section: Introductionmentioning

confidence: 99%

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Incompressibility in finite nuclei and nuclear matter

2014

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The incompressibility (compression modulus) K0 of infinite symmetric nuclear matter at saturation density has become one of the major constraints on mean-field models of nuclear many-body systems as well as of models of high density matter in astrophysical objects and heavy-ion collisions. It is usually extracted from data on the Giant Monopole Resonance (GMR) or calculated using theoretical models. We present a comprehensive re-analysis of recent data on GMR energies in even-even 112−124 Sn and 106,100−116 Cd and earlier data on 58 ≤ A ≤ 208 nuclei. The incompressibility of finite nuclei KA is calculated from experimental GMR energies and expressed in terms of A −1/3 and the asymmetry parameter β = (N-Z)/A as a leptodermous expansion with volume, surface, isospin and Coulomb coefficients K vol , K surf , Kτ and K coul . Only data consistent with the scaling approximation, leading to a fast converging leptodermous expansion, with negligible higher-order-term contributions to KA, were used in the present analysis. Assuming that the volume coefficient K vol is identified with K0, the K coul = -(5.2 ± 0.7) MeV and the contribution from the curvature term KcurvA −2/3 in the expansion is neglected, compelling evidence is found for K0 to be in the range 250 < K0 < 315 MeV, the ratio of the surface and volume coefficients c = K surf /K vol to be between -2.4 and -1.6 and Kτ between -840 and -350 MeV. In addition, estimation of the volume and surface parts of the isospin coefficient Kτ , Kτ,v and Kτ,s, is presented.We show that the generally accepted value of K0 = (240 ± 20) MeV can be obtained from the fits provided c ∼ -1, as predicted by the majority of mean-field models. However, the fits are significantly improved if c is allowed to vary, leading to a range of K0, extended to higher values. The results demonstrate the importance of nuclear surface properties in determination of K0 from fits to the leptodermous expansion of KA .A self-consistent simple (toy) model has been developed, which shows that the density dependence of the surface diffuseness of a vibrating nucleus plays a major role in determination of the ratio K surf /K vol and yields predictions consistent with our findings.

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Section: Microscopic Modelsmentioning

confidence: 99%

Section: Microscopic Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Incompressibility in finite nuclei and nuclear matter

2014

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“…For the purposes of this chapter, examples of prior U&G research associated with social media have been selected for discussion (see Table 1). For more background on U&G, Reinhard and Dervin [52] provide an introduction to its history, theory, and applications, and Quan-Haase and Young discuss its applicability to social media [50]. While there are several motivations for social media adoption, two of the most salient themes throughout the literature are social and informational factors [32,68].…”

Section: Uses and Gratificationsmentioning

confidence: 99%

A Model of Social Media Engagement: User Profiles, Gratifications, and Experiences

McCay‐Peet

Quan‐Haase

2016

Why Engagement Matters

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“…In media research, the transmission model found continued life as part of research using Social Learning Theory and later, Social Cognitive Theory (Bandura, 1986). Research conducted under the theme of learning the audience's uses and gratifications of media (Blumler & Katz, 1974) would find the transmission model amenable for some time before succumbing to criticism that audiences were more active than the approach gave them credit (e.g., Reinhard & Dervin, 2009).…”

Section: Communication As Language Usementioning

confidence: 99%

2 Theories and models of communication: foundations and heritage

Eadie¹,

Goret²

2013

Theories and Models of Communication

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This chapter charts the historical influences on the theories and models that shaped the communication discipline. This chapter illustrates the importance of U.S. and European scholars from not only the beginnings of the communication discipline, but those who were pre-eminent in other academic disciplines such as sociology, psychology, political science and journalism, as well as examining emerging scholarship from Asia that focuses on understanding cultural differences through communication theories. The chapter traces the foundations and heritage of the communication from five perspectives: (1) communication as shaper of public opinion; (2) communication as language use; (3) communication as information transmission; (4) communication as developer of relationships; and (5) communication as definer, interpreter, and critic of culture.

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Media Uses and Gratifications

Cited by 9 publications

References 0 publications

Incompressibility in finite nuclei and nuclear matter

Incompressibility in finite nuclei and nuclear matter

A Model of Social Media Engagement: User Profiles, Gratifications, and Experiences

2 Theories and models of communication: foundations and heritage

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