Mona Lisa, the stochastic view and fractality in color spaceA painting consists of objects which are arranged in specific ways. The art of painting is drawing the objects, which can be considered as known trends, in an expressive manner. Detrended methods are…P. Pedram, G. R. Jafari·Jan 16, 2008SaveLearn
Extending the definition of modularity to directed graphs with overlapping communitiesComplex networks topologies present interesting and surprising properties, such as community structures, which can be exploited to optimize communication, to find new efficient and context-aware…V. Nicosia, G. Mangioni, V. Carchiolo et al.·Jan 10, 2008SaveLearn
A Method for Deriving Transverse Masses Using Lagrange MultipliersWe use Lagrange multipliers to extend the traditional definition of Transverse Mass used in experimental high energy physics. We demonstrate the method by implementing it to derive a new Transverse…Eilam Gross, Ofer Vitells·Jan 9, 2008SaveLearn
Transmission code optimization method for incoherent scatter radarWhen statistical inversion of a lag profile is used to determine an incoherent scatter target, the posterior variance of the estimated target can be used to determine how well a certain set of…Juha Vierinen, Markku S. Lehtinen, Mikko Orispaa et al.·Jan 9, 2008SaveLearn
Personal Recommendation via Modified Collaborative FilteringIn this paper, we propose a novel method to compute the similarity between congeneric nodes in bipartite networks. Different from the standard Person correlation, we take into account the influence…Runran Liu, Chunxiao Jia, Tao Zhou et al.·Jan 8, 2008SaveLearn
Automated Reconstruction of Particle Cascades in High Energy Physics ExperimentsWe present a procedure for reconstructing particle cascades from event data measured in a high energy physics experiment. For evaluating the hypothesis of a specific physics process causing the…O. Actis, M. Erdmann, A. Henrichs et al.·Jan 8, 2008SaveLearn
Consensus of self-driven agents with avoidance of collisionsIn recent years, many efforts have been addressed on collision avoidance of collectively moving agents. In this paper, we propose a modified version of the Vicsek model with adaptive speed, which can…Liqian Peng, Yang Zhao, Baomei Tian et al.·Jan 2, 2008SaveLearn
PCA Beyond The Concept of Manifolds: Principal Trees, Metro Maps, and Elastic Cubic ComplexesMultidimensional data distributions can have complex topologies and variable local dimensions. To approximate complex data, we propose a new type of low-dimensional ``principal object'': a…A. N. Gorban, N. R. Sumner, A. Y. Zinovyev·Dec 31, 2007SaveLearn
Elastic Maps and Nets for Approximating Principal Manifolds and Their Application to Microarray Data VisualizationPrincipal manifolds are defined as lines or surfaces passing through ``the middle'' of data distribution. Linear principal manifolds (Principal Components Analysis) are routinely used for…A. N. Gorban, A. Y. Zinovyev·Dec 30, 2007SaveLearn
Goodness of fit tests for weighted histogramsWeighted histogram in Monte-Carlo simulations is often used for the estimation of a probability density function. It is obtained as a result of random experiment with random events that have weights.…N. D. Gagunashvili·Dec 27, 2007SaveLearn
Applying Bayesian Neural Networks to Event Reconstruction in Reactor Neutrino ExperimentsA toy detector has been designed to simulate central detectors in reactor neutrino experiments in the paper. The electron samples from the Monte-Carlo simulation of the toy detector have been…Ye Xu, Weiwei Xu, Yixiong Meng et al.·Dec 25, 2007SaveLearn
From Data to Probability Densities without HistogramsWhen one deals with data drawn from continuous variables, a histogram is often inadequate to display their probability density. It deals inefficiently with statistical noise, and binsizes are free…Bernd A. Berg, Robert C. Harris·Dec 22, 2007SaveLearn
A Quantitative Measure of Experimental Scientific MeritExperimental program review in our field may benefit from a more quantitative framework within which to quantitatively discuss the scientific merit of a proposed program of research, and to assess…Bruce Knuteson·Dec 20, 2007SaveLearn
Symmetry Breaking Study with Random Matrix EnsemblesA random matrix model to describe the coupling of m-fold symmetry is constructed. The particular threefold case is used to analyze data on eigenfrequencies of elastomechanical vibration of an…M. S. Hussein, J. X. de Carvalho, M. P. Pato et al.·Dec 19, 2007SaveLearn
A nonlinear Stein based estimator for multichannel image denoisingThe use of multicomponent images has become widespread with the improvement of multisensor systems having increased spatial and spectral resolutions. However, the observed images are often corrupted…Caroline Chaux, Laurent Duval, Amel Benazza-Benyahia et al.·Dec 14, 2007SaveLearn
Nonlinear theory and tests of earthquake recurrence timesWe develop an efficient numerical scheme to solve accurately the set of nonlinear integral equations derived previously in (Saichev and Sornette, 2007), which describes the distribution of…D. Sornette, S. Utkin, A. Saichev·Dec 14, 2007SaveLearn
Fractal scale-invariant and nonlinear properties of cardiac dynamics remain stable with advanced age: A new mechanistic picture of cardiac control in healthy elderlyWe analyze heartbeat interval recordings from two independent databases: (a) 19 healthy young (avg. age 25.7 years) and 16 healthy elderly subjects (avg. age 73.8 years) during 2h under resting…Daniel T. Schmitt, Plamen Ch. Ivanov·Dec 10, 2007SaveLearn
Unsupervised and semi-supervised clustering by message passing: Soft-constraint affinity propagationSoft-constraint affinity propagation (SCAP) is a new statistical-physics based clustering technique. First we give the derivation of a simplified version of the algorithm and discuss possibilities of…Michele Leone, Sumedha, Martin Weigt·Dec 7, 2007SaveLearn
The Theory of Uncertainty for Derived Results: Properties of Equations Representing Physicochemical Evaluation SystemsAny physiochemical variable (Ym) is always determined from certain measured variables Xi. The uncertainties ui of measuring Xi are generally a priori ensured as acceptable. However, there is no…B. P. Datta·Dec 7, 2007SaveLearn
Analysis based on the Wavelet & Hilbert transforms applied to the full time series of interbeats, for a triad of failures at the heartA tetra of sets which elements are time series of interbeats has been obtained from the databank Physionet-MIT-BIH, corresponding to the following failures at the humans' heart: Obstructive Sleep…P. A. Ritto·Dec 6, 2007SaveLearn
Dynamics of Non-Conservative VotersWe study a family of opinion formation models in one dimension where the propensity for a voter to align with its local environment depends non-linearly on the fraction of disagreeing neighbors.…R. Lambiotte, S. Redner·Dec 3, 2007SaveLearn
Uncovering latent singularities from multifractal scaling laws in mixed asymptotic regime. Application to turbulenceIn this paper we revisit an idea originally proposed by Mandelbrot about the possibility to observe ``negative dimensions'' in random multifractals. For that purpose, we define a new way to…J. F. Muzy, E. Bacry, R. Baile et al.·Nov 30, 2007SaveLearn
Fitting function for asymmetric peaksIn the paper a new fitting function is suggested, which can essentially increase the existing instrumentation for fitting of asymmetric peaks with the only maximum.A. D. Bukin·Nov 28, 2007SaveLearn
Polyphase alternating codesThis work introduces a method for constructing polyphase alternating codes in which the length of a code transmission cycle can be pm or p-1, where p is a prime number and m is a positive…Markku Markkanen, Juha Vierinen·Nov 28, 2007SaveLearn
Prior-predictive value from fast growth simulationsBuilding on a variant of the Jarzynski equation we propose a new method to numerically determine the prior-predictive value in a Bayesian inference problem. The method generalizes thermodynamic…Holger Ahlers, Andreas Engel·Nov 22, 2007SaveLearn