1,123 research outputs found
Ekpyrosis and inflationary dynamics in heavy ion collisions: the role of quantum fluctuations
We summarize recent significant progress in the development of a
first-principles formalism to describe the formation and evolution of matter in
very high energy heavy ion collisions. The key role of quantum fluctuations
both before and after a collision is emphasized. Systematic computations are
now feasible to address early time dynamics essential to quantifying properties
of strongly interacting quark-gluon matter.Comment: Talk by R.V. at Quark Matter 2011, Annecy, France, May 23-28, 2011.
LaTex, 4 pages; v2, final version to appear in J. Phys.
The Effect of Normalization on Intrusion Detection Classifiers (Na�ve Bayes and J48)
Intrusion Detection has become an inevitable area for commercial applications and academic research. Network traffic is typically very high volume and consists of both qualitative and quantitative data with different range of values. Raw data needs to be pre-processed before fed into any learning model and the most used technique is normalization [1]. Attribute normalization eliminates the dominance of attributes with extreme values by scaling it within the range. However, many intrusion detection methods do not normalize attributes before training and detection [2]. Network traffic data contains features that are qualitative or quantitative nature and has to be treated differently [3]. This work studies the effect of normalization on Naive Bayes and J48 Decision tree classifier with the corrected KDDCUP99 and Kyoto 2006+ dataset. A comprehensive approach for normalization for network traffic attributes has been proposed
Decoherence of a Pointer by a Gas Reservoir
We study the effect of the environment on the process of the measurement of a
state of a microscopic spin half system. The measuring apparatus is a heavy
particle, whose center of mass coordinates can be considered at the end of the
measurement as approximately classical, and thus can be used as a pointer. The
state of the pointer, which is the result of its interaction with the spin, is
transformed into a mixed state by the coupling of the pointer to the
environment. The environment is considered to be a gas reservoir, whose
particles interact with the pointer. This results in a Fokker-Planck equation
for the reduced density matrix of the pointer. The solution of the equation
shows that the quantum coherences, which are characteristic to the entangled
state between the probabilities to find the pointer in one of two positions,
decays exponentially fast in time. We calculate the exponential decay function
of this decoherence effect, and express it in terms of the parameters of the
model.Comment: 41 pages, 1 figur
Indian Legal NLP Benchmarks : A Survey
Availability of challenging benchmarks is the key to advancement of AI in a
specific field.Since Legal Text is significantly different than normal English
text, there is a need to create separate Natural Language Processing benchmarks
for Indian Legal Text which are challenging and focus on tasks specific to
Legal Systems. This will spur innovation in applications of Natural language
Processing for Indian Legal Text and will benefit AI community and Legal
fraternity. We review the existing work in this area and propose ideas to
create new benchmarks for Indian Legal Natural Language Processing
A Statistical Model for Ascertaining the Influence and Reliability of Weather Parameters on Incidence of Blossom Blight in Mango (Mangifera indica L.)
A statistical model was developed to study the influence and reliability of weatlier parameters on incidence of blossom blight in Mango (Mangifera indica) and subsequently to predict their incidence. Results showed that preceding week's weather variables viz., maximum and minimum temperature, evaporation, rainfall, morning and evening relative humidity and wind speed were found to collectively predict blossom blight incidence to the extent of 94.3 per cent. Further, as a measure of goodness-of-fit, the coefficient of determination (R2) and mean squared error were used to evaluate the empirical model developed by using above variables. Validation test showed that the model developed using relative humidity at 07.30 h (X3), evaporation (X5) and wind speed (X6) (Y = 883.4 - 8.065 X3-11.506 X5 -33.619 X6) could predict the incidence to the extent of 75.7%. This model is useful in determining the role of climatic factors in disease appearance and progression and devising suitable management strategy
First correction to JIMWLK evolution from the classical equations of motion
We calculate some corrections to the JIMWLK kernel in
the framework of the light-cone wave function approach to the high energy limit
of QCD. The contributions that we consider originate from higher order
corrections in the strong coupling and in the density of the projectile to the
solution of the classical Yang-Mills equations of motion that determine the
Weizs\"acker-Williams fields of the projectile. We study the structure of these
corrections in the dipole limit, showing that they are subleading in the limit
of large number of colours , and that they cannot be fully recast in the
form of dipole degrees of freedom.Comment: 4 pages, LaTeX, 2 eps figures included using graphicx, uses enclosed
iopart.cls; contribution to the proceedings of Quark Matter 2006 (Shanghai,
November 14th-20th 2006
Variation in Relation between Yield and Yield Attributes in 'Thompson Seedless' Grape and its Clones
To study variation in the relationship between yield and yield attributes in 'Thompson seedless', 'Tas-A-Ganesh' and '2A clone' vines grafted onto Dogridge rootstock and trained on the extended Y training system, data collected from 120 vines in each variety were subjected to correlation and regression analysis. Numbers of clusters per vine was the main contributing factor for yield in all these varieties. It determined the yield by 87.9, 42.0 and 51.5%, respectively, in 'Thompson Seedless', 'Tas-A-Ganesh' and '2A clone', with the optimum number of clusters at 27.3, 43.1 and 46.5, respectively. Contrary to that in vars. Thompson Seedless and Tas-A-Ganesh, increase in number of canes was associated with higher cluster/cane ratio. Yield depended upon cluster weight in 'Thompson Seedless', mediated through number of clusters, but was not a contributory factor as evidenced by a negative correlation between clusterweight and yield. Increase in cluster weight was associated with increase in number of berries in all the varieties. Increase in berry weight was related to cluster weight in only Thompson Seedless and Tas-A-Ganesh. While berry number and berry weight together determined cluster weight by 96.3 and 92.4%, respectively, in vars. Thompson Seedless and Tas-A-ganesh, this value was just 39.0% in '2A clone'. These studies provide a clue that for realizing higher yield, cluster size needs to be greater while limiting the number of canes/vine in vars. Thompson Seedless and Tas-A-Ganesh. Increase in the number of canes would benefit '2A clone' by adopting suitable cultural practices
Controlled coupling of counterpropagating whispering-gallery modes by a single Rayleigh scatterer: a classical problem in a quantum optical light
We present experiments where a single subwavelength scatterer is used to
examine and control the back-scattering induced coupling between
counterpropagating high-Q modes of a microsphere resonator. Our measurements
reveal the standing wave character of the resulting symmetric and antisymmetric
eigenmodes, their unbalanced intensity distributions, and the coherent nature
of their coupling. We discuss our findings and the underlying classical physics
in the framework common to quantum optics and provide a particularly intuitive
explanation of the central processes.Comment: accepted for publication in Pysical Review Letter
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