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Rees, Jonathan

doi:10.1017/s0031819100047598

Cited by 3 publications

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“…The numbers demonstrate the difficulties to image these objects. In the absence of imaging information, X-ray spectropolarimetric observations can deliver the additional information required to decide between models which cannot be distinguished based on spectroscopic data alone [1,2,3,4,5,6,7,8,9]. An X-ray polarimeter can deliver for each time interval not only an energy spectrum of the X-ray flux F (E), but also the energy spectra of the X-ray polarization degree a 0 (E) and the X-ray polarization direction φ 0 (E).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the data from Compton X-ray polarimeters which measure the azimuthal and polar scattering angles

Krawczynski

2011

Astroparticle Physics

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a b s t r a c t X-ray polarimetry has the potential to make key-contributions to our understanding of galactic compact objects like binary black hole systems and neutron stars, and extragalactic objects like active galactic nuclei, blazars, and Gamma-Ray Bursts. Furthermore, several particle astrophysics topics can be addressed including uniquely sensitive tests of Lorentz invariance. In the energy range from 10 keV to several MeV, Compton polarimeters achieve the best performance. In this paper we evaluate the benefit that comes from using the azimuthal and polar angles of the Compton scattered photons in the analysis, rather than using the azimuthal scattering angles alone. We study the case of an ideal Compton polarimeter and show that a Maximum Likelihood analysis which uses the two scattering angles lowers the Minimum Detectable Polarization (MDP) by %20% compared to a standard analysis based on the azimuthal scattering angles alone. The accuracies with which the polarization fraction and the polarization direction can be measured improve by a similar amount. We conclude by discussing potential applications of Maximum Likelihood analysis methods for various polarimeter experiments.

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Section: Introductionmentioning

confidence: 99%

Analysis of the data from Compton X-ray polarimeters which measure the azimuthal and polar scattering angles

Krawczynski

2011

Astroparticle Physics

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Producing Parsons' reputation: Early critiques of Talcott Parsons' social theory and the making of a caricature

Owens

2010

J History Behavioral Science

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This article examines the critical responses to Talcott Parsons' first major work, The Structure of Social Action (1937), and his two subsequent books, Toward a General Theory of Action and The Social System (both 1951). Because Parsons' work was the subject of such virulent debate, we cannot fully understand Parsons' impact on the discipline of sociology without understanding the source and nature of those early criticisms. I trace the responses to Parsons, first through book reviews and private letters and then in the more substantial statements of C. Wright Mills, George Homans, and Alvin Gouldner, from the largely positive but superficial reception of Structure to the polemics that followed Parsons' 1951 works. In the late 1930s and 1940s, Parsons' reputation grew steadily but there remained no careful reception of Structure, fostering resentment toward Parsons in some quarters while precluding a sophisticated understanding of his work. After 1951, a few critics capitalized on that tension, writing sweeping rejections of Parsons' work that spoke to a much broader audience of sociologists. That dynamic, coupled with Parsons' own indifference toward his harshest critics, produced a situation in which many sociologists simply chose not to read Parsons in the 1950s and 1960s, reinforcing a caricature and distorting perceptions of Parsons' place in mid-twentieth-century American sociology.

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Violence exposure, conflict, and health outcomes in inner‐city African American adolescents

et al. 2019

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Purpose To examine relationships among community and school violence exposure, parent‐adolescent conflict, coping style, and self‐reported health in a sample of 432 high‐risk, inner‐city African American adolescents at age 14 years. Design and methods Multiple regression and principal component analysis were used to analyze the secondary data. After controlling for multiple covariates (eg, sex, age, blood lead levels, and socioeconomic status), both violence exposure and posttraumatic stress symptoms (PTSS) were related to health outcomes. The survey of exposure to community violence, the safe‐school survey, and the conflict tactics scale were used to measure community violence, school violence, and parent‐adolescent conflict. Coping was evaluated using the general coping scale. The child health illness profile‐adolescent edition was used to obtain self‐reported health measures, and the clinician‐assisted PTSD scale was used to measure PTSS. Results Higher exposure to community violence was associated with less emotional comfort, less family involvement, higher individual risk, and poorer academic and work performance. Parent‐adolescent conflict predicted less physical and emotional comfort and poorer home safety and health. Conclusions Our findings suggest that it is important to evaluate both violence exposure and the responses to the exposure, which can include both PTSS and diverse coping strategies.

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Untitled

Cited by 3 publications

References 0 publications

Analysis of the data from Compton X-ray polarimeters which measure the azimuthal and polar scattering angles

Analysis of the data from Compton X-ray polarimeters which measure the azimuthal and polar scattering angles

Producing Parsons' reputation: Early critiques of Talcott Parsons' social theory and the making of a caricature

Violence exposure, conflict, and health outcomes in inner‐city African American adolescents

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