1,922 research outputs found
Systematic study of the energy of vanishing flow: Role of equations of state and cross sections
We present a systematic study of the energy of vanishing flow by considering
symmetric colliding nuclei (between C and U) at normalized
impact parameters using variety of equations of state (with and without
momentum dependent interactions) as well as different nucleon-nucleon cross
sections. A perfect power law mass dependence is obtained in all the cases
which passes through calculated points nicely. Further, the choice of impact
parameter affects the energy of vanishing flow drastically, demanding a very
accurate measurement of the impact parameter. However, the energy of vanishing
flow is less sensitive towards the equation of state as well as its momentum
dependence.Comment: 9 pages, 2 figure
The study of participant-spectator matter and collision dynamics in heavy-ion collisions
We present the simulations of heavy-ion collisions in terms of
participant-spectator matter. We find that this matter depends crucially on the
collision dynamics and history of the nucleons. The important changes in the
momentum space are due to the binary nucleon-nucleon collisions experienced
during the high dense phase. This was otherwise not possible with mean field
alone. The collisions push the colliding nucleons into midrapidity region
responsible for the formation of participant matter. This ultimately leads to
thermalization in heavy-ion collisions.Comment: 15 pages, 8 figure
Holistic Measures for Evaluating Prediction Models in Smart Grids
The performance of prediction models is often based on "abstract metrics"
that estimate the model's ability to limit residual errors between the observed
and predicted values. However, meaningful evaluation and selection of
prediction models for end-user domains requires holistic and
application-sensitive performance measures. Inspired by energy consumption
prediction models used in the emerging "big data" domain of Smart Power Grids,
we propose a suite of performance measures to rationally compare models along
the dimensions of scale independence, reliability, volatility and cost. We
include both application independent and dependent measures, the latter
parameterized to allow customization by domain experts to fit their scenario.
While our measures are generalizable to other domains, we offer an empirical
analysis using real energy use data for three Smart Grid applications:
planning, customer education and demand response, which are relevant for energy
sustainability. Our results underscore the value of the proposed measures to
offer a deeper insight into models' behavior and their impact on real
applications, which benefit both data mining researchers and practitioners.Comment: 14 Pages, 8 figures, Accepted and to appear in IEEE Transactions on
Knowledge and Data Engineering, 2014. Authors' final version. Copyright
transferred to IEE
Participant-spectator matter at the energy of vanishing flow
We aim to study the participant-spectator matter over a wide range of
energies of vanish- ing flow and masses. For this, we have employed different
model parameters at central and semi-central colliding geometries. A nearly
mass independent nature of the participant matter has been obtained at the
energy of vanishing flow. Further, participant matter can also act as an
indicator to study the degree of thermalization.Comment: Proceedings of the International Symposium on Nuclear Physics, Mumbai
(INDIA), Vol. 54 pg. 452 (2009
Sensitivity of the transverse flow towards symmetry energy
We study the sensitivity of transverse flow towards symmetry energy in the
Fermi energy region as well as at high energies. We find that transverse flow
is sensitive to symmetry energy as well as its density dependence in the Fermi
energy region. We also show that the transverse flow can address the symmetry
energy at densities about twice the saturation density, however it shows the
insensitivity towards the symmetry energy at densities 2.
The mechanism for the sensitivity of transverse flow towards symmetry energy as
well as its density dependence is also discussed.Comment: Phys. Rev. C (in press)2011 14 pages, 6 figure
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