134,583 research outputs found
Social Media: the Wild West of CSR Communications
Purpose - The central argument that this paper posits is that traditional media of old presented a clear, ordered world of communication management for organisations to extol their CSR credentials. In contrast to this, new Web 2.0 social media is increasingly being used by activists and hactivists to challenge corporate communication CSR messages and does so by highlighting instances and examples of Corporate Social Irresponsibility (CSI) (Jones, Bowd and Tench, 2009; Tench, Sun and Jones, 2012). Design/methodology/approach - The paper reports on research data from the European Communication Monitor 2010, 2011 and 2012 (http://www.communicationmonitor.eu/) and draws on work already published in this area (Tench, Verhoeven and Zerfass, 2009; Verhoeven et al, 2012; and Zerfass et al, 2010, 2011) to illustrate the unruly unregulated Web 2.0 social media communication landscape in Europe. A range of literature is drawn on to provide the theoretical context for an exploration of issues that surround social media. Findings - In late modernity (Giddens, 1990) communication comes in many guises. Social media is one guise and it has re-shaped as well as transformed the nature of communications and the relationship between organisations and their stakeholders. Originality/value - Communicating CSR in the Wild West of social media requires diplomatic and political nous, as well as awareness and knowledge of the dangers and pitfalls of CSI. The data reported on in this paper illustrates well the above points and sets out scenarios for future development of corporate communication of CSR through, and with social media
Swimming of a sphere in a viscous incompressible fluid with inertia
The swimming of a sphere immersed in a viscous incompressible fluid with
inertia is studied for surface modulations of small amplitude on the basis of
the Navier-Stokes equations. The mean swimming velocity and the mean rate of
dissipation are expressed as quadratic forms in term of the surface
displacements. With a choice of a basis set of modes the quadratic forms
correspond to two hermitian matrices. Optimization of the mean swimming
velocity for given rate of dissipation requires the solution of a generalized
eigenvalue problem involving the two matrices. It is found for surface
modulations of low multipole order that the optimal swimming efficiency depends
in intricate fashion on a dimensionless scale number involving the radius of
the sphere, the period of the cycle, and the kinematic viscosity of the fluid.Comment: 19 pages, 4 figure
Optimal translational swimming of a sphere at low Reynolds number
Swimming velocity and rate of dissipation of a sphere with surface
distortions are discussed on the basis of the Stokes equations of low Reynolds
number hydrodynamics. At first the surface distortions are assumed to cause an
irrotational axisymmetric flow pattern. The efficiency of swimming is optimized
within this class of flows. Subsequently more general axisymmetric polar flows
with vorticity are considered. This leads to a considerably higher maximum
efficiency. An additional measure of swimming performance is proposed based on
the energy consumption for given amplitude of stroke.Comment: 34 pages, 12 figure
Third Harmonic Cavity Modal Analysis
Third harmonic cavities have been designed and fabricated by FNAL to be used
at the FLASH/XFEL facility at DESY to minimise the energy spread along the
bunches. Modes in these cavities are analysed and the sensitivity to frequency
errors are assessed. A circuit model is employed to model the monopole bands.
The monopole circuit model is enhanced to include successive cell coupling, in
addition to the usual nearest neighbour coupling. A mode matching code is used
to facilitate rapid simulations, incorporating fabrication errors. Curves
surfaces are approximated by a series of abrupt transitions and the validity of
this approach is examinedComment: Proceedings of 14th International Conference on RF Superconductivity
(SRF 2009), 2009, Berlin, German
Induced Gravity II: Grand Unification
As an illustration of a renormalizable, asymptotically-free model of induced
gravity, we consider an gauge theory interacting with a real scalar
multiplet in the adjoint representation. We show that dimensional transmutation
can occur, spontaneously breaking to while
inducing the Planck mass and a positive cosmological constant, all proportional
to the same scale . All mass ratios are functions of the values of coupling
constants at that scale. Below this scale (at which the Big Bang may occur),
the model takes the usual form of Einstein-Hilbert gravity in de Sitter space
plus calculable corrections. We show that there exist regions of parameter
space in which the breaking results in a local minimum of the effective action,
and a {\bf positive} dilaton from two-loop corrections
associated with the conformal anomaly. Furthermore, unlike the singlet case we
considered previously, some minima lie within the basin of attraction of the
ultraviolet fixed point. Moreover, the asymptotic behavior of the coupling
constants also lie within the range of convergence of the Euclidean path
integral, so there is hope that there will be candidates for sensible vacua.
Although open questions remain concerning unitarity of all such renormalizable
models of gravity, it is not obvious that, in curved backgrounds such as those
considered here, unitarity is violated. In any case, any violation that may
remain will be suppressed by inverse powers of the reduced Planck mass.Comment: 44 pages, 5 figures, 2 tables. v2 has new discussion concerning
stability of SSB plus related appendix. Additional references added. v3 is
version to be published; contains minor revision
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