98 research outputs found
Censorship of the press in South Africa during the Angolan War: a case study of news manipulation and suppression
During the Angolan War of 1975-6, whilst South African troops were actively engaged on the side of the Unita/FNLA alliance, news media in South Africa were prohibited from disclosing information about the country's role in the war. Under Section 118 of the Defence Amendment Act of 1967, no information about SA troop movements or plans could be published without the permission of the Minister of Defence or his nominees. This case study shows how the Government used the Defence Act to censor certain news while releasing other news which suited its political outlook and objectives. The study documents the history of the Defence Act and of the military-press liaison machinery which grew out of it. The introduction defines propaganda as a technique of ideological control designed to supplement the control of society by means of repression. The study sets in context the Government's propaganda strategy before, during and after the Angolan War, arguing that the structures of white domination, including the newspaper industry, are being drawn into the Government's scheme of total co-ordination to fight a total war
Planets in Spin-Orbit Misalignment and the Search for Stellar Companions
The discovery of giant planets orbiting close to their host stars was one of
the most unexpected results of early exoplanetary science. Astronomers have
since found that a significant fraction of these 'Hot Jupiters' move on orbits
substantially misaligned with the rotation axis of their host star. We recently
reported the measurement of the spin-orbit misalignment for WASP-79b by using
data from the 3.9 m Anglo-Australian Telescope. Contemporary models of
planetary formation produce planets on nearly coplanar orbits with respect to
their host star's equator. We discuss the mechanisms which could drive planets
into spin-orbit misalignment. The most commonly proposed being the Kozai
mechanism, which requires the presence of a distant, massive companion to the
star-planet system. We therefore describe a volume-limited direct-imaging
survey of Hot Jupiter systems with measured spin-orbit angles, to search for
the presence of stellar companions and test the Kozai hypothesis.Comment: Accepted for publication in the peer-reviewed proceedings of the 13th
annual Australian Space Science Conferenc
Cosmological Tensions and the Transitional Planck Mass Model
In this followup analysis, we update previous constraints on the Transitional
Planck Mass (TPM) modified gravity model using the latest version of EFTCAMB
and provide new constraints using SPT and Planck anisotropy data along with
Planck CMB lensing, BAO, SNe Ia, and an prior from local measurements. We
find that large shifts in the Planck mass lead to large suppression of power on
small scales that is disfavored by both SPT and Planck. Using only SPT TE-EE
data, this suppression of power can be compensated for by an upward shift of
the scalar index to resulting in kmsMpc and a shift in the Planck
mass. Including Planck TT and Planck TE-EE data restricts the
shift to be at with
kmsMpc. Excluding the prior, SPT and Planck data constrain
the shift in the Planck mass to be at with a best-fit value of
, consistent with the CDM limit. In this case kmsMpc, which is partially elevated by the
dynamics of the scalar-field in the late universe. This differs from EDE models
that prefer higher values of when high Planck TT data are
excluded. We additionally constrain TPM using RSD data from BOSS DR 12 and
cosmic shear, galaxy-galaxy lensing, and galaxy clustering data from DES Y1
finding both disfavor transitions close to recombination, but earlier Planck
mass transitions are allowed.Comment: 25 pages, 8 figures, 8 table
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