Searching for isovector signatures in the neutron-rich oxygen and calcium isotopes

We search for potential isovector signatures in the neutron-rich oxygen and calcium isotopes within the framework of a relativistic mean-field theory with an exact treatment of pairing correlations. To probe the isovector sector we calibrate a few relativistic density functionals using the same isoscalar constraints but with one differing isovector assumption. It is found that under certain conditions, the isotopic chain in oxygen can be made to terminate at the experimentally observed ${}^{24}$O isotope and in the case of the calcium isotopes at ${}^{60}$Ca. To produce such behavior, the resulting symmetry energy must be soft, with predicted values for the symmetry energy and its slope at saturation density being $J\!=\!(30.92\pm0.47)$ MeV and $L\!=\!(51.0\pm1.5)$ MeV, respectively. As a consequence, the neutron-skin thickness of ${}^{208}$Pb is rather small: $R_{\rm skin}^{208}\!=\!(0.161\pm0.011)$ fm. This same model - labelled "FSUGarnet" - predicts $R_{1.4}\!=\!(13.1\pm0.1)$ km for the radius of a "canonical" 1.4$M_{\odot}$ neutron star, yet is also able to support a two-solar-mass neutron star.Comment: 6 pages, 5 figure

Dynamic reorganization of the middle fusiform gyrus: long-term bird expertise predicts decreased face selectivity

What is the functional relationship between face-selective and expertise-predicated object-selective regions in the human middle fusiform gyrus? In two separate fMRI experiments, superior behaviorally-measured bird expertise predicts both higher middle fusiform gyrus selectivity for birds and, concomitantly, lower selectivity for faces. This finding suggests a long-term dynamic reorganization of the neural mechanisms underlying the visual recognition of faces and non-face

Emails, educators, practitioners and changing professional paradigms

The management of relationships with stakeholders, key publics and clients is central to the practice of public relations. Maintaining relationships and valuing those that have been established between practitioners and their clients and between practitioners and other organisations, has become increasingly important to the practitioner. However within the changing communication environment of email and Websites can these relationships be managed effectively? Both the practitioner and the educator of public relations are communicating with virtual clients and virtual students through online discussion, email messages, chat rooms and organisational websites. This paper points to the way in which practitioners are adjusting to the changes in online relationship management both online and through traditional communication, and how this can be reflected in educators’ response to online teaching of public relation

LM radar reflectivity simulation Final report

Ultrasonic simulation of lunar module radar reflectivit

An Analysis of the Banana Import market in the U.S.

Demand, banana, import, market power, Demand and Price Analysis, Food Consumption/Nutrition/Food Safety,