8,101 research outputs found
The internet as a relationship marketing tool - some evidence from Irish companies
This article explores the strategies underlying the use of the internet as a marketing tool by Irish businesses. Three different approaches to internet Marketing are described: the ornamental, the informational and the relational. It is shown that, theoretically, the internet offers a unique
opportunity for marketers to build up and maintain relationships with their clients. However, data collected through a mail survey and a content analysis of web sites reveal that currently the most frequent use of the
internet by Irish companies still follows an ornamental or, at most, informational pattern. The authors discuss whether this discrepancy between internet potential and practice is due to the social basis of market relationships or whether it can be seen as evidence that the adaptation of a new marketing tool follows an incremental pattern
Flash of photons from the early stage of heavy-ion collisions
The dynamics of partonic cascades may be an important aspect for particle
production in relativistic collisions of nuclei at CERN SPS and BNL RHIC
energies. Within the Parton-Cascade Model, we estimate the production of single
photons from such cascades due to scattering of quarks and gluons q g -> q
gamma, quark-antiquark annihilation q qbar -> g gamma, or gamma gamma, and from
electromagnetic brems-strahlung of quarks q -> q gamma. We find that the latter
QED branching process plays the dominant role for photon production, similarly
as the QCD branchings q -> q g and g -> g g play a crucial role for parton
multiplication. We conclude therefore that photons accompanying the parton
cascade evolution during the early stage of heavy-ion collisions shed light on
the formation of a partonic plasma.Comment: 4 pages including 3 postscript figure
Criticality for branching processes in random environment
We study branching processes in an i.i.d. random environment, where the
associated random walk is of the oscillating type. This class of processes
generalizes the classical notion of criticality. The main properties of such
branching processes are developed under a general assumption, known as
Spitzer's condition in fluctuation theory of random walks, and some additional
moment condition. We determine the exact asymptotic behavior of the survival
probability and prove conditional functional limit theorems for the generation
size process and the associated random walk. The results rely on a stimulating
interplay between branching process theory and fluctuation theory of random
walks.Comment: Published at http://dx.doi.org/10.1214/009117904000000928 in the
Annals of Probability (http://www.imstat.org/aop/) by the Institute of
Mathematical Statistics (http://www.imstat.org
Analysis of reaction dynamics at RHIC in a combined parton/hadron transport approach
We introduce a transport approach which combines partonic and hadronic
degrees of freedom on an equal footing and discuss the resulting reaction
dynamics. The initial parton dynamics is modeled in the framework of the parton
cascade model, hadronization is performed via a cluster hadronization model and
configuration space coalescence, and the hadronic phase is described by a
microscopic hadronic transport approach. The resulting reaction dynamics
indicates a strong influence of hadronic rescattering on the space-time pattern
of hadronic freeze-out and on the shape of transverse mass spectra. Freeze-out
times and transverse radii increase by factors of 2 - 3 depending on the hadron
species.Comment: 10 pages, 4 eps figures include
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