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Data Analysis papers — page 86

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A measure of centrality based on the spectrum of the Laplacian
We introduce a family of new centralities, the k-spectral centralities. k-Spectral centrality is a measurement of importance with respect to the deformation of the graph Laplacian associated with the…
Scott D. Pauls, Daniel RemondiniDec 20, 2011
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Ricean Shadowed Statistical Characterization of Shallow Water Acoustic Channels for Wireless Communications
In this letter, the statistical behaviour of the shallow water acoustic channel for wireless communications is shown to be well characterized by the Ricean shadowed distribution, which has never been…
F. Ruiz-Vega, M. C. Clemente, P. Otero et al.Dec 19, 2011
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Methods of Measuring Physical Characteristics of Partial Components of Multicomponent Samples
Consideration is given to the methods of gaining experimental data on the substances which constitute a part of multicomponent samples to be measured. The methods are applicable to the samples…
A. Yu. BukiDec 19, 2011
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Probably a discovery: Bad mathematics means rough scientific communication
According to the media, in spring of this year the experiment CDF at Fermilab has made most likely ("this result has a 99.7 percent chance of being correct", Discovery News) a great discovery…
G. D'AgostiniDec 15, 2011
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Semi-Supervised Anomaly Detection - Towards Model-Independent Searches of New Physics
Most classification algorithms used in high energy physics fall under the category of supervised machine learning. Such methods require a training set containing both signal and background events and…
Mikael Kuusela, Tommi Vatanen, Eric Malmi et al.Dec 14, 2011
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Null Models of Economic Networks: The Case of the World Trade Web
In all empirical-network studies, the observed properties of economic networks are informative only if compared with a well-defined null model that can quantitatively predict the behavior of such…
Giorgio Fagiolo, Tiziano Squartini, Diego GarlaschelliDec 13, 2011
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Error Bars for Distributions of Numbers of Events
The common practice for displaying error bars on distributions of numbers of events is confusing and can lead to incorrect conclusions. A proposal is made for a different style of presentation that…
Ritu Aggarwal, Allen CaldwellDec 12, 2011
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Information filtering via biased heat conduction
Heat conduction process has recently found its application in personalized recommendation [T. Zhou et al., PNAS 107, 4511 (2010)], which is of high diversity but low accuracy. By decreasing…
Jian-Guo Liu, Tao Zhou, Qiang GuoDec 11, 2011
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Information Filtering via Implicit Trust-based Network
Based on the user-item bipartite network, collaborative filtering (CF) recommender systems predict users' interests according to their history collections, which is a promising way to solve the…
Zhao-Guo Xuan, Zhan Li, Jian-Guo LiuDec 11, 2011
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Estimating a Signal In the Presence of an Unknown Background
We describe a method for fitting distributions to data which only requires knowledge of the parametric form of either the signal or the background but not both. The unknown distribution is fit using…
Wolfgang A. Rolke, Angel M. LópezDec 10, 2011
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SVD-based unfolding: implementation and experience
With the first year of data taking at the LHC by the experiments, unfolding methods for measured spectra are reconsidered with much interest. Here, we present a novel ROOT-based implementation of the…
Kerstin Tackmann, Andreas HoeckerDec 9, 2011
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Analysis of fractional Gaussian noises using level crossing method
The so-called level crossing analysis has been used to investigate the empirical data set. But there is a lack of interpretation for what is reflected by the level crossing results. The fractional…
M. Vahabi, G. R. Jafari, M. Sadegh MovahedDec 7, 2011
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Approximated maximum likelihood estimation in multifractal random walks
We present an approximated maximum likelihood method for the multifractal random walk processes of [E. Bacry et al., Phys. Rev. E 64, 026103 (2001)]. The likelihood is computed using a Laplace…
Ola Løvsletten, Martin RypdalDec 1, 2011
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The MGDO software library for data analysis in Ge neutrinoless double-beta decay experiments
The GERDA and Majorana experiments will search for neutrinoless double-beta decay of germanium-76 using isotopically enriched high-purity germanium detectors. Although the experiments differ in…
M. Agostini, J. A. Detwiler, P. Finnerty et al.Nov 30, 2011
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Off-line data quality monitoring for the GERDA experiment
GERDA is an experiment searching for the neutrinoless ββ decay of Ge-76. The experiment uses an array of high-purity germanium detectors, enriched in Ge-76, directly immersed in liquid argon. GERDA…
P. Zavarise, M. Agostini, A. A. Machado et al.Nov 30, 2011
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Fisher information as a performance metric for locally optimum processing
For a known weak signal in additive white noise, the asymptotic performance of a locally optimum processor (LOP) is shown to be given by the Fisher information (FI) of a standardized even probability…
Fabing Duan, Francois Chapeau-Blondeau, Derek AbbottNov 24, 2011
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Application of quasi-optimal weights to searches of anomalies. Statistical criteria for step-like anomalies in cumulative spectra
The statistical method of quasi-optimal weights can be used to derive criteria for searches of anomalies. As an example we derive a convenient statistical criterion for step-like anomalies in…
A. V. Lokhov, F. V. Tkachov, P. S. TrukhanovNov 21, 2011
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The Critical Coupling Likelihood Method: A new approach for seamless integration of environmental and operating conditions of gravitational wave detectors into gravitational wave searches
Any search effort for gravitational waves (GW) using interferometric detectors like LIGO needs to be able to identify if and when noise is coupling into the detector's output signal. The Critical…
Cesar A. Costa, Cristina V. TorresNov 18, 2011
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Off-line data processing and analysis for the GERDA experiment
GERDA is an experiment designed to look for the neutrinoless double beta decay of Ge-76. The experiment uses an array of high-purity germanium detectors, enriched in Ge-76, directly immersed in…
M. Agostini, L. Pandola, P. ZavariseNov 15, 2011
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A simple energy loss model and its applications for silicon detectors
The energy loss of charged particles in silicon can be approximated by a simple analytical model. With help of measured charge deposits in individual channels of hit clusters their position and…
Ferenc SiklerNov 14, 2011
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Universal scaling in sports ranking
Ranking is a ubiquitous phenomenon in the human society. By clicking the web pages of Forbes, you may find all kinds of rankings, such as world's most powerful people, world's richest people,…
Weibing Deng, Wei Li, Xu Cai et al.Nov 12, 2011
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Optimized differential energy loss estimation for tracker detectors
The estimation of differential energy loss for charged particles in tracker detectors is studied. The robust truncated mean method can be generalized to the linear combination of the energy deposit…
Ferenc Sikler, Sandor SzelesNov 10, 2011
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Plotting the Differences Between Data and Expectation
This article proposes a way to improve the presentation of histograms where data are compared to expectation. Sometimes, it is difficult to judge by eye whether the difference between the bin content…
Georgios Choudalakis, Diego CasadeiNov 8, 2011
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Searching for optimal variables in real multivariate stochastic data
By implementing a recent technique for the determination of stochastic eigendirections of two coupled stochastic variables, we investigate the evolution of fluctuations of NO2 concentrations at two…
Frank Raischel, Ana Russo, Maria Haase et al.Nov 8, 2011
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LUXSim: A Component-Centric Approach to Low-Background Simulations
Geant4 has been used throughout the nuclear and high-energy physics community to simulate energy depositions in various detectors and materials. These simulations have mostly been run with a source…
D. S. Akerib, X. Bai, S. Bedikian et al.Nov 8, 2011
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