46,488 research outputs found
6C radio galaxies at z~1: The influence of radio power on the alignment effect
Powerful radio galaxies often display enhanced optical/UV continuum emission
and extended emission line regions, elongated and aligned with the radio jet
axis. The expansion of the radio source strongly affects the gas clouds in the
surrounding IGM, and the kinematic and ionization properties of the extended
emission line regions display considerable variation over the lifetime of
individual sources, as well as with cosmic epoch. We present the results of
deep rest-frame UV and optical imaging and UV spectroscopy of high redshift 6C
radio galaxies. The interdependence of the host galaxy and radio source
properties are discussed, considering: (i) the relative contribution of shocks
associated with the expanding radio source to the observed emission line gas
kinematics, and their effect on the ionization state of the gas; (ii) the
similarities and differences between the morphologies of the host galaxies and
aligned emission for a range of radio source powers; and (iii) the influence of
radio power on the strength of the observed alignment effect.Comment: LaTeX, 6 pages, 5 figures, Elsevier Science format. To appear in
"Radio galaxies: past, present & future". eds. M. Jarvis et al., Leiden, Nov
200
Algebraic Multigrid for Disordered Systems and Lattice Gauge Theories
The construction of multigrid operators for disordered linear lattice
operators, in particular the fermion matrix in lattice gauge theories, by means
of algebraic multigrid and block LU decomposition is discussed. In this
formalism, the effective coarse-grid operator is obtained as the Schur
complement of the original matrix. An optimal approximation to it is found by a
numerical optimization procedure akin to Monte Carlo renormalization, resulting
in a generalized (gauge-path dependent) stencil that is easily evaluated for a
given disorder field. Applications to preconditioning and relaxation methods
are investigated.Comment: 43 pages, 14 figures, revtex4 styl
Goffman Told Me, It Is Really Hard to Do That Kind of Thing Well, and That Was About all the Advice I Ever Got from Him
This interview with Joel Best was recorded on August 13, 2007, during the ASA Annual meeting in New York. Dmitri Shalin transcribed the audio recording and Joel Best edited the text and gave his approval for posting the present version in the Erving Goffman Archives. Breaks in the conversation flow are indicated by ellipses. Supplementary information appears in square brackets. Undecipherable words and unclear passages are identified in the text as â[?]â. The interviewerâs questions are shortened a bit in several places
Smith & Lundquist Denton\u27s Soul Searching: The Religious and Spiritual Lives of American Teenagers - Book Review
Book Reviews: Practicing Medicine and Ethics: Integrating Wisdom, Conscience, and Goals of Care
Book review: -
Practicing Medicine and Ethics: Integrating Wisom, Conscience, and Goals of Care, Lauris Christopher Kaldjian. New York, NY: Cambridge University Press, 2014. ISBN 978-110701216
Menthol mouth rinsing: An applied perspective
With the Tokyo Olympics rapidly approaching, and increasing global temperatures, applied nutrition practitioners and supporting scientists are looking for ways to physiologically cool their athletes, but the value of perceptual cooling is also gaining a profile; menthol mouth swilling is one such strategy. This article provides a brief synopsis of menthol research to date,
followed by a reflection of how we have used menthol mouth rinsing to complement anIro nmanâą triathleteâs event nutrition strategy, and concludes by highlighting ethical concerns with menthol mouth rinsing
Rare B Decays at BaBar
We report recent results in the search for the rare B meson decays B-->rho
gamma and B0-->pi0 pi0. These results are based on 56.4 1/fb collected by the
BaBar Collaboration at the SLAC PEP-II e+e- B Factory. We set new 90%
confidence level upper limits BR(B0 --> rho0 gamma)
rho+ gamma) pi0 pi0) < 3.4 x 10^-6.Comment: 4 pages, 4 figures; invited talk given at XXXVIIth Rencontres de
Moriond QCD and High Energy Hadronic Interactions, 16-23 March 200
Crossing the Bridge of Size: Reaching a Deal at Nice
The Intergovernmental Conference which should conclude at Nice in December 2000 deals with issues of institutional reform which must be resolved before proceeding with enlargement. There are four main questions. Should all countries be able to name a Member of the European Commission, or should the number of Commissioners be âcappedâ at a number lower than the number of Member States? How should the weighting of Member Statesâ votes in the Council be adjusted to ensure that winning coalitions under qualified-majority voting represent an adequate proportion of the total EU population â as well as to âcompensateâ those five Member States which lose their second Commissioner? How far should qualified-majority voting be extended? Should the conditions for âcloser cooperationâ be relaxed to make it easier to press ahead with integration in particular areas without the participation of all Member States? A deal must be reached at Nice, but the IGC has revealed serious differences between the Member States. There is likely to be an agreement: for one Commissioner per Member State, probably with an internal hierarchy; a significant reweighting of votes in favour of the big Member States; a moderate extension of qualified-majority voting; and at least the removal of the veto regarding closer cooperation. Yet relative size has emerged as a source of frictions and concerns about long-term solidarity. The big countries fear being tied down. The smaller ones have long-term concerns about being dominated or absorbed, as well as presentational problems. If all the results of the IGC are seen as concessions to the large countries, it will be hard to sell the Nice Treaty at home â and Denmark has again shown that people can say No. Too much intergovernmentalism is not the answer. The Community institutions cannot do everything, but they have played an essential role in overcoming fears about relative power. They need to be renewed, not replaced
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