7,034 research outputs found

    Ecology and Environment: They\u27ve Been Integrated into J-Education Thinking

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    The article focuses on the impact of ecology and the environment on journalism education. Environmental concerns have measurably affected curricula, internships, public service programs and professional liaisons in journalism education. Environmentally-related breadth courses are required or primarily, optional in 28 percent of the programs, with about 68 percent of those programs requiring or recommending traditional, natural science-oriented environmental courses, and 45 percent including those with social science orientation, perhaps reflecting the social overtones of environmental problems made salient by the environmental era

    Bounds on OPE Coefficients from Interference Effects in the Conformal Collider

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    We apply the average null energy condition to obtain upper bounds on the three-point function coefficients of stress tensors and a scalar operator, ⟨TTO⟩,\langle TT {\cal O } \rangle, in general CFTs. We also constrain the gravitational anomaly of U(1)U(1) currents in four-dimensional CFTs, which are encoded in three-point functions of the form ⟨TTJ⟩\langle TT J \rangle. In theories with a large NN AdS dual we translate these bounds into constraints on the coefficient of a higher derivative bulk term of the form ∫ϕW2\int \phi\hspace{.5mm} W^2 . We speculate that these bounds also apply in de-Sitter. In this case our results constrain inflationary observables, such as the amplitude for chiral gravity waves that originate from higher derivative terms in the Lagrangian of the form ϕWW∗\phi \hspace{.5mm}W W^*.Comment: 46 pages, 3 figure

    Observation of gamma-rays from LMC X-4 above 10(16) eV

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    Data from the University of Adelaide air shower array at Buckland Park taken over a three year period have been analyzed to search for evidence of ultra high energy gamma-ray emission from neutron star binary X-ray sources having known orbital periods. The detection of UHE gamma-rays from LMC X-4 above 10 to the 16th power eV, is reported; the first extragalactic object to be positively detected at these energies

    Analytical study of the optimum geometric configuration of a space shuttle materials laboratory

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    A steady state, collisionless flow analysis was made of the density distribution within a hemisphere-disc system due to independent, uniformly distributed internal gas sources. The model was used to estimate the density within a molecular shield, deployed from the shuttle orbiter, which contained internal experiments having a prescribed gas source. Contour plots of the density distribution within the system were presented for disc-to-hemisphere radius ratios of .1, .3, .5, .7, and for disc-to-hemisphere surface emission flux density ratios of .01, 1, 100. The hemisphere-disc system was compared to the empty hemisphere, and it was found that if the disc emission flux density was the same as the hemisphere and the disc radius was not greater than 1/3 of the hemisphere radius, the increase in density at the center of the hemisphere-disc system was less than 50%

    Constructing a Social Problem: The Press and the Environment

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    The U. S. daily press might seem to be in a strategic position to function as a claims-maker in the early construction of a social problem. But in the case of the manufacture of environmentalism as a social reality in the 1960\u27s and 70\u27s, the press was fairly slow to adopt a holistic environmental lexicon. Its reporting of environmental news even now only partially reflects concepts promoted by positive environmental claims-makers, such as planet-wide interdependence, and the threats to it by destructive technologies. The movement of environmental claims seems to have started with interest-group entrepreneurship using interpersonal communication and independent publication, gone on to attention in government, then finally--and incompletely--been put on the agenda of the daily press. Once on the press agenda, coverage of environmental issues may have improved. But there are some constraints, possibly inherent in the press as an institution, that limit its role in the incipient construction of some social problems
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