The generalized Chaplygin gas (GCG) model explains the recent accelerated expansion of the Universe via an exotic background fluid whose equation of state is given by p = −A/ρ α , where A is a positive constant and 0 < α ≤ 1. The model is an interesting alternative to scenarios involving scalar field potentials, with the ensuing unnatural fine tuning conditions for the underlying particle physics theories. We derive constraints on the parameter space of the model from bounds on the location of the first few peaks and troughs of the the Cosmic Microwave Background Radiation (CMBR) power spectrum arising from recent WMAP and BOOMERanG data.PACS number(s): 98.80.Cq * Also at CFIF, Instituto Superior Técnico, Lisboa.

No abstract

A well-educated, professional nursing workforce is essential to good health care outcomes. Although nursing education is being strengthened globally, considerable diversity persists in the level and standards of nursing education both within and across countries. An international framework of guidelines for nursing education has, therefore, been developed to promote greater international consistency and high-quality nursing education globally The purpose of this paper is to discuss the multinational methodology used to develop a global framework for professional nursing education and the policy implications of this framework in guiding the harmonization of nursing education demanded by the State of the World’s Nursing 2020 (WHO,2020a) call to action. The framework includes the underpinning assumption that nurses be prepared at the baccalaureate level and three pillars of global expectations targeting: a) learning outcomes for graduating preservice nursing students; b) standards for nursing programs, and c) standards for educational institutions delivering nursing programs. The Global Pillars Framework reflects international best practices, but the guidelines are adaptable across socio-cultural contexts facilitating the integration of locally relevant education. As 2020 has been declared the Year of the Nurse and Midwife globally, the ground has been laid for the next evolution in the education of the nursing workforce globally.

We examine the variation of the fine structure constant in the context of a two-field quintessence model. We find that, for solutions that lead to a transient late period of accelerated expansion, it is possible to fit the data arising from quasar spectra and comply with the bounds on the variation of α from the Oklo reactor, meteorite analysis, atomic clock measurements, Cosmic Microwave Background Radiation and Big Bang Nucleosynthesis. That is more difficult if we consider solutions corresponding to a late period of permanent accelerated expansion.

Objective: to analyze the contribution of Portuguese nursing to improving universal health access and coverage by means of the identification of nurses in the health system; evolution of health indicators; and access-promoting systems, in which nurses play a relevant role. Method: this was documentary research of publications fromnational and international organizations on planning and health outcomes. Statistical databases and legislation on health reforms were consulted. Results: nurses represent 30.18% of human resources in the national health service; the systems of access promotion performed by nurses have good levels of efficacy (95.5%) and user satisfaction (99% completely satisfied); in the local care the creation of Community Care Units (185) occurred, and 85.80% of home consultations were performed by nurses. Conclusion: political strategies, the National Health Service and strengthening of human resourcesin healthcareare the main determinants. Nursing is the most numerous professional group in the National Health Service, however numbers remaindeficient in primary health care. The improvement of academic qualification and self-regulation of this professional group has allowed for better answers inimproving health for the Portuguese.