University of Portsmouth

About: University of Portsmouth is a education organization based out in Portsmouth, Portsmouth, United Kingdom. It is known for research contribution in the topics: Population & Galaxy. The organization has 5452 authors who have published 14256 publications receiving 424346 citations. The organization is also known as: Portsmouth and Gosport School of Science and Art & Portsmouth and Gosport School of Science and the Arts.

Chaotic inflation on the brane

Abstract: We consider slow-roll inflation in the context of recently proposed four-dimensional effective gravity induced on the world-volume of a three-brane in five-dimensional Einstein gravity. We find significant modifications of the simplest chaotic inflationary scenario when the five-dimensional Planck scale is below about 1017 GeV. We use the comoving curvature perturbation, which remains constant on super-Hubble scales, in order to calculate the spectrum of adiabatic density perturbations generated. Modifications to the Friedmann constraint equation lead to a faster Hubble expansion at high energies and a more strongly damped evolution of the scalar field. This assists slow-roll, enhances the amount of inflation obtained in any given model, and drives the perturbations towards an exactly scale-invariant Harrison-Zel’dovich spectrum. In chaotic inflation driven by a massive scalar field we show that inflation can occur at field values far below the four-dimensional Planck scale, though above the five-dimensional fundamental scale.

Towards a framework for managing corporate identity

Abstract: Notes how the value of developing corporate identity (CI), as a means of encouraging an organization's key stakeholders to perceive the corporate entity in a clear and positive way, has been receiving increased attention in the last decade. To date much of the practitioner and academic attention has been focused on the communication function between an organization and its customers (primarily). In order that managers and academics are able to realize more of the potential that CI offers organizations, it is necessary to consider the role and impact CI can have on strategic management. Reviews the literature and considers the concepts of corporate identity, image, reputation and personality. Determines the linkages between these concepts and argues that image research studies should not just be oriented to improving images and communications but that this information can also have a central role to play in the strategic development of an organization. To do this presents a framework, referred to as a corporate identity management process (CIMP). Provides an illustration which shows how an understanding of stakeholder images can be used, via the CIMP, to reveal opportunities for developing sustainable competitve advantage.

A CD14-independent LPS receptor cluster

Abstract: Bacterial lipopolysaccharide (LPS), the major structural component of the outer wall of Gram-negative bacteria, is a potent initiator of an inflammatory response and serves as an indicator of bacterial infection. Although CD14 has been identified as the main LPS receptor, accumulating evidence has suggested the possible existence of other functional receptor(s). In this study, using affinity chromatography, peptide mass fingerprinting and fluorescence resonance energy transfer, we have identified four new proteins that form an activation cluster after LPS ligation and are involved in LPS signal transduction. Here we present evidence that implicates heat shock proteins 70 and 90, chemokine receptor 4 and growth differentiation factor 5 as the main mediators of activation by bacterial lipopolysaccharide.

A Short Version of the Occupational Self-Efficacy Scale: Structural and Construct Validity Across Five Countries

Abstract: Occupational self-efficacy is an important resource for individuals in organizations. To be able to compare the occupational self-efficacy of employees across different countries, equivalent versions of the standard instruments need to be made available in different languages. In this article, the authors report on the structural and construct validity of an instrument that assesses occupational self-efficacy across five countries (Germany, Sweden, Belgium, United Kingdom, Spain), based on an overall sample of N =1,535. The instrument can be recommended for comparative use in German, Swedish, Belgian, Spanish, and British organizational contexts.