Two-point motional Stark effect diagnostic for Madison Symmetric Torus

A high-precision spectral motional Stark effect (MSE) diagnostic provides internal magnetic field measurements for Madison Symmetric Torus (MST) plasmas. Currently, MST uses two spatial views-on the magnetic axis and on the midminor (off-axis) radius, the latter added recently. A new analysis scheme has been developed to infer both the pitch angle and the magnitude of the magnetic field from MSE spectra. Systematic errors are reduced by using atomic data from atomic data and analysis structure in the fit. Reconstructed current density and safety factor profiles are more strongly and globally constrained with the addition of the off-axis radius measurement than with the on-axis one only

'Respect me: respect self' - the key to improved global relationships.

This paper examines the definitions of respect in a 21st century globally inclusive environment, with a view to exploring the implications for nurturing harmonious working relationships in, and between culturally diverse economically active groups. It is based on research conducted since 2005 which explores the meanings attached to, and experience of, respect from the perspective of undergraduate students in a UK university business school, who worked together on a consulting to business module. The research methodology consisted of tracking via focus group interactions and video records of two culturally diverse groups, comprising seven students each, over a two year period, with approximately eight focus group – video sessions per group. Significantly, our findings suggest that respect is an important shared value, and one that all students acknowledge as having an impact on their behaviour, attitudes and emotions. We argue that in our case, respect develops as an awareness of difference and is based on systematically produced data of the actors’ life experience, rather than, fictions or stereotypes. We suggest that this process encourages a positive approach to respect as it facilitates a shift in behaviours, attitudes, and ‘mental models’, (the latter, as described by Senge et al 1994). The significance of respect to the development and maintenance of both an economic democracy and for transnational relations between such democracies, is therefore crucial if there is to be equal access for all, regardless of their diversity, to the benefits which should accrue to all those who participate in the wealth creation activity of their society and the global economy

Nonmonotonic Trust Management for P2P Applications

Community decisions about access control in virtual communities are non-monotonic in nature. This means that they cannot be expressed in current, monotonic trust management languages such as the family of Role Based Trust Management languages (RT). To solve this problem we propose RT-, which adds a restricted form of negation to the standard RT language, thus admitting a controlled form of non-monotonicity. The semantics of RT- is discussed and presented in terms of the well-founded semantics for Logic Programs. Finally we discuss how chain discovery can be accomplished for RT-.Comment: This paper appears in the proceedings of the 1st International Workshop on Security and Trust Management (STM 2005). To appear in ENTC

Fading of the Transient Anomalous X-ray Pulsar XTE J1810-197

Three observations of the 5.54 s Transient Anomalous X-ray Pulsar XTE J1810-197 obtained over 6 months with the Newton X-Ray Multi-Mirror Mission (XMM-Newton) are used to study its spectrum and pulsed light curve as the source fades from outburst. The decay is consistent with an exponential of time constant 300 days, but not a power law as predicted in some models of sudden deep crustal heating events. All spectra are well fitted by a blackbody plus a steep power law, a problematic model that is commonly fitted to anomalous X-ray pulsars (AXPs). A two-temperature blackbody fit is also acceptable, and better motivated physically in view of the faint optical/IR fluxes, the X-ray pulse shapes that weakly depend on energy in XTE J1810-197, and the inferred emitting areas that are less than or equal to the surface area of a neutron star. The fitted temperatures remained the same while the flux declined by 46%, which can be interpreted as a decrease in area of the emitting regions. The pulsar continues to spin down, albeit at a reduced rate of (5.1+/-1.6)x10^{-12} s s^{-1}. The inferred characteristic age Tau_c = P/2Pdot ~17,000 yr, magnetic field strength B_s ~1.7x10^{14} G, and outburst properties are consistent with both the outburst and quiescent X-ray luminosities being powered by magnetic field decay, i.e., XTE J1810-197 is a magnetar.Comment: 10 pages, 5 figures, accepted by Ap.