Výsledky vyhledávání

Abstract We formulate a new class of modified gravity models, that is, generalized four-dimensional Chern–Pontryagin models, whose action is characterized by an arbitrary function of the Ricci scalar R and the Chern–Pontryagin topological term $$

Externí odkaz: https://doaj.org/article/788e0dce83334f1f8eb3fe3a14a9b68b

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Review

Empire Maker: Aleksandr Baranov and Russian Colonial Expansion into Alaska and Northern California . By Kenneth N. Owens and Alexander Yu . Petrov. Seattle : University of Washington Press , 2015 . 360 pp. Notes, bibliography, and index. $50 (cloth).

Publikováno v: Journal of American Ethnic History, 2017 Apr 01. 36(3), 91-92.

Externí odkaz: https://www.jstor.org/stable/10.5406/jamerethnhist.36.3.0091

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Akademický článek

Glaucoma epidemiology in the Russian Federation

Autor: V. V. Neroev, L. A. Mikhaylova, T. N. Malishevskaya, S. Yu. Petrov, O. M. Filippova

Publikováno v: Российский офтальмологический журнал, Vol 17, Iss 3, Pp 7-12 (2024)

Glaucoma is worldwide the most common cause of irreversible blindness. Its prevalence in the population older than 40 years is about 3.5 %, and correlates with age. The most common type is primary open-angle glaucoma (POAG). The global prevalence of

Externí odkaz: https://doaj.org/article/744f14c9f0544a8abc429a87f8a2470a

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Akademický článek

Methodology for extracting narratives from social media big data

Autor: E. Yu. Petrov, A. Yu. Sarkisova, D. O. Dunaeva, A. S. Voronov, M. G. Myagkov

Publikováno v: Модернизация, инновация, развитие, Vol 15, Iss 3, Pp 404-420 (2024)

Purpose: of the article is to present the experience in developing and testing the methodology for extracting a system of narratives on a socially significant phenomenon from authentic social network big data (using the example of narratives about CO

Externí odkaz: https://doaj.org/article/ba193f0a655e438cb98f777b8cac13e1

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Akademický článek

Derivative four-fermion model, effective action and bumblebee generation

Autor: R. Araújo, T. Mariz, J. R. Nascimento, A. Yu. Petrov

Publikováno v: European Physical Journal C: Particles and Fields, Vol 84, Iss 10, Pp 1-7 (2024)

Abstract In this paper, we study the one-loop effective potential of a derivative four-fermion model. As a result, an exact bumblebee-like potential is radiatively generated. Afterwards, we generalize our study for a finite temperature case and expli

Externí odkaz: https://doaj.org/article/d8ebce855e83493184f8843cff8e4309

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Akademický článek

Analysis of Profiles of Supporters of Conspiracy Narratives about Vaccination Against COVID-19 on a Social Network

Autor: Anna Yu. Sarkisova, Daria O. Dunaeva, Evgeny Yu. Petrov, Aleksandr S. Voronov

Publikováno v: Галактика медиа: журнал медиа исследований, Vol 6, Iss 3, Pp 199-223 (2024)

The article analyzes the socio-demographic characteristics and value-worldview self-positioning of the distributors of conspiracy narratives (“conspiracy theories”) about vaccination against COVID-19 on the Russian social network “VK”. The re

Externí odkaz: https://doaj.org/article/0c4a0ceb821e43fd8f7334dbfe759fed

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