37 research outputs found
Warm stellar matter with deconfinement: application to compact stars
We investigate the properties of mixed stars formed by hadronic and quark
matter in -equilibrium described by appropriate equations of state (EOS)
in the framework of relativistic mean-field theory. We use the non- linear
Walecka model for the hadron matter and the MIT Bag and the Nambu-Jona-Lasinio
models for the quark matter. The phase transition to a deconfined quark phase
is investigated. In particular, we study the dependence of the onset of a mixed
phase and a pure quark phase on the hyperon couplings, quark model and
properties of the hadronic model. We calculate the strangeness fraction with
baryonic density for the different EOS. With the NJL model the strangeness
content in the mixed phase decreases. The calculations were performed for T=0
and for finite temperatures in order to describe neutron and proto-neutron
stars. The star properties are discussed. Both the Bag model and the NJL model
predict a mixed phase in the interior of the star. Maximum allowed masses for
proto-neutron stars are larger for the NJL model ( M)
than for the Bag model ( M).Comment: RevTeX,14 figures, accepted to publication in Physical Review
Safety assessment of cosmetic products, with emphasis on the ocular area: regulatory aspects and validation processes
A decade of graphene research: production, applications and outlook
Graphene research has accelerated exponentially since 2004 when graphene was isolated and
characterized for the first time utilizing the âScotch Tapeâ method by Geim and Novoselov and given the
reports of unique electronic properties that followed. The number of academic publications reporting
the use of graphene was so substantial in 2013 that it equates to over 40 publications per day. With such
an enormous interest in graphene it is imperative for both experts and the layman to keep up with both
current graphene technology and the history of graphene technology. Consequently, this review
addresses the latter point, with a primary focus upon disseminating graphene research with a more
applicatory approach and the addition of our own personal graphene perspectives; the future outlook of
graphene is also considered