548 research outputs found
Acceleration and Particle Field Interactions of Cosmic Rays I: Formalism
The acceleration of ultra high energy cosmic rays is conjectured to occur
through various interactions with the electromagnetic fields in different
astrophysical objects, like magnetic matter clumps, besides the well-known
shock and stochastic Fermi mechanisms. It is apparent that the latter are not
depending on the particle's charge, quantitatively. Based on this model, a
considerable portion of the dynamics, that derives a charged particle parallel
to a magnetic field and under the influence of a force
, is assumed to be composed of an acceleration by a non-magnetic
force and a gyromotion along direction,
plus drifts in the direction of . The model and its
formalism are introduced. Various examples for drift motions and accelerating
forces are suggested. The formalism is given in a non-relativistic version.
Obviously, the translation into the relativistic version is standard. In a
forthcoming work, a quantitative estimation of the energy gained by charged
cosmic rays in various astrophysical objects will be evaluated.Comment: 9 pages, 2 EPS figure
T-government for benefit realisation
This paper proposes a model for t-Government and highlights the research agenda needed to
increase understanding of transformational government and the processes involved in
furthering the agenda of the t-Government. In particular, both an operational and a conceptual
model for the effective involvement of citizens and businesses in government functioning
have been proposed. This will help to define an agenda for t-Government research that
emerges from national UK strategy and policy for e-Government. The main threads of t-
Government encompass: (1) A citizen-centric delivery of public services or e-inclusion, (2) A
shared services culture to maximize value added to clients, (3) The effective delivery and
management of resources and skills within government or professionalism. All three threads
should be addressed principally from the perspectives of delivery, evaluation and participation
in view of benefit realisation as envisioned by Government strategic planning and policy
directives (CabinetOffice, 2005). The management of change dimension of these phenomena
have been included in the research agenda. In particular, research is needed to reshape the
discourse towards emphasising a citizen centric approach that defines, develops, and benefits
from public service. Decision makers in Government will need models of Governance that
fulfil transformational objectives. They will also need models of benefits realisation within a
strategic Governance framework. It has been argued that t-Government research should be
addressing these relative voids
Particle production in proton-proton collisions
Proton-proton collision is a simple system to investigate nuclear matter and
it is considered to be a guide for more sophisticated processes in the
proton-nucleus and the nucleus-nucleus collisions. In this article, we present
a phenomological study of how the mechanism of particle production in pp
interaction changes over a wide range of interaction energy. This study is done
on data of charged particle produced in pp experiments at different values of
energy. Some of these data give the created particles classified as hadrons,
baryons and mesons, which help us compare between production of different
particles. This might probe some changes in the state of nuclear matter and
identify the mechanism of interaction.Comment: arXiv admin note: text overlap with arXiv:1410.715
Interaction of 160 GeV- Muon with Emulsion Nuclei
In this work we present some results of the interaction of high energy muons
with emulsion nuclei. The interaction results in emission of a number of
fragments as a consequence of electromagnetic dissociation of the excited
target nuclei. This excitation is attributed to absorption of photons by the
target nuclei due to the intense electric field of the very fast incident muon
particles. The interactions take place at impact parameters that allows
ultra-peripheral collisions to take place, leading to giant resonances and
hence multi-fragmentation of emulsion targets. Charge identification, range,
energy spectra, angular distribution and topological cross-section of the
produced fragments are measured and evaluatedComment: 13 pages, 4 figures, 4 tables. Accepted for publication in IJMP
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