Results 11 to 20 of about 3,604,186 (292)

A Toy Model for Blandford-Znajek Mechanism [PDF]

open access: yes, 1999
A toy model for the Blandford-Znajek mechanism is investigated: a Kerr black hole with a toroidal electric current residing in a thin disk around the black hole.
B. Carter   +23 more
core   +3 more sources

Freedom Now! Radical Jazz and Social Movements

open access: yesPraktyka Teoretyczna, 2014
Music is obviously not only an aesthetic phenomenon. It is embeddedin a dense network of social relations. However, its social involvementis rather ambiguous, particularly since the second half of the twentiethcentury.
Przemysław Pluciński
doaj   +1 more source

Student activism in a time of crisis in South Africa: The quest for ‘black power’

open access: yesSouth African Journal of Education, 2018
Higher Education in South Africa has been in crisis over recent years. University systems in many parts of South Africa have witnessed student protest, as well as ongoing violence, resulting in many campuses turning into spaces of violent confrontation ...
Sonwabo Stuurman
doaj   +1 more source

Indian Power and Black Power: Reception of the Black Thought in Fausto Reinaga

open access: yesÍconos, 2015
We present the reception of the “black question” and of several black intellectuals, such as Frantz Fanon, Stokely Carmichael and Charles V. Hamilton, in the works of the indigenous specialist, or Indianista, Fausto Reinaga (1906-1994).
Gustavo R. Cruz
doaj   +1 more source

Detection of distinct power spectra in soft and hard X-ray bands in the hard state of GRS 1915+105 [PDF]

open access: yes, 2014
The well-known black hole X-ray binary GRS 1915+105 is a unique source in the sense that it cannot be classified within the standard picture of black hole binary states.
Stiele, H., Yu, W.
core   +1 more source

No evidence for black hole spin powering of jets in X-ray binaries [PDF]

open access: yes, 2010
In this paper we take the reported measurements of black hole spin for black hole X-ray binaries, and compare them against measurements of jet power and speed across all accretion states in these systems.
Belloni   +100 more
core   +1 more source

James Brown in a network of ideological stratifications of the Afro-American Civil Rights Movement [PDF]

open access: yesZbornik Radova Akademije Umetnosti, 2020
The ideological dispersion of the African-American Civil Rights Movement resulted in political atrophy of emancipatory actions as early as the second half of the 1960s.
Sovtić Nemanja
doaj  

“The Shape of the Wrath to Come”: James Baldwin’s Radicalism and the Evolution of His Thought on Israel

open access: yesJames Baldwin Review, 2020
This article traces the evolution of James Baldwin’s discourse on the Arab–Israeli conflict as connected to his own evolution as a Black thinker, activist, and author. It creates a nuanced trajectory of the transformation of Baldwin’s thought on the Arab–
Nadia Alahmed
doaj   +1 more source

Research on the Configuration Scheme and Starting Method of Black Start and Emergency Diesel Generator Unit in Gas Turbine Power Plant

open access: yes南方能源建设, 2023
[Introduction] In order to reduce the initial investment in the gas turbine power plant and ensure the safety of the unit, and obtain the economic subsidy of Guangdong auxiliary services through the black start function, the configuration scheme of using
Xiaoyan XU, Jianfeng MAO, Yun SHEN
doaj   +1 more source

Higher-dimensional black holes with a conformally invariant Maxwell source [PDF]

open access: yes, 2007
We consider an action for an abelian gauge field for which the density is given by a power of the Maxwell Lagrangian. In d spacetime dimensions this action is shown to enjoy the conformal invariance if the power is chosen as d/4.
Cristián Martínez   +5 more
core   +2 more sources

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