Eugene Stanley

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In this paper we describe data exploration techniques designed to classify DNA sequences. Several visualization and data mining techniques were used to validate and attempt to discover new methods for distinguishing coding DNA sequences, or exons, from non-coding DNA sequences, or introns. The goal of the data mining was to see whether some other possibly(More)
We investigate the relation between trading activity—measured by the number of trades N t—and the price change G t for a given stock over a time interval [t, t + t]. We relate the time-dependent standard deviation of price changes—volatility—to two microscopic quantities: the number of transactions N t in t and the variance W 2 t of the price changes for(More)
The detailed topological or ‘connectivity’ properties of the clusters formed in diffusion limited aggregation (DLA) and cluster-cluster aggregation (CCA) are considered for spatial dimensions d = 2,3 and 4. Specifically, for both aggregation phenomena we calculate the fractal dimension d,,, = i-’ defined by e R d m l n where e is the shortest path between(More)
Detailed results are reported for the connectivity properties of a system of discs of unit radius free to be situated anywhere within a square of area 2L2. Ordinary lattke percolation would correspond to the discs being situated on the vertices of a J2L x J 2 L lattice. Computer simulations are carried out for a sequence of increasing system sizes ranging(More)
Water is characterized by a density anomaly whose origin is a matter of debate. Theoretical works have shown that two of the proposed explanations, the second-critical-point hypothesis and the singularity-free scenario, have the same microscopic origin, but arise from different choices of parameters, such as the hydrogen bond strength or geometry. We(More)
We study the liquid anomalies arising from the Stell-Hemmer interaction, using molecular dynamics simulations and approximate 2D solutions. We observe in the liquid phase three types of anomalies: (i) An increase in specific volume upon cooling, (ii) an increase in isothermal compressibility upon cooling, and (iii) an increase in the diffusion coefficient(More)
We demonstrate that a tunable family of patterns resembling a range of experimentally observed snowflakes is obtained from a simple but somewhat ad hoc nondeterministic growth model-an extension of the Niemeyer-PietroneroWiesmann 7 model in which we ( i ) use ‘noise reduction’ to enable the asymptotic behaviour to become more readily apparent from(More)
José S. Andrade, Jr., Sergey V. Buldyrev, Nikolay V. Dokholyan, Shlomo Havlin, Peter R. King, Youngki Lee,* Gerald Paul, and H. Eugene Stanley Center for Polymer Studies, Boston University, Boston, Massachusetts 02215 Departamento de Fı́sica, Universidade Federal do Ceará, 60451-970 Fortaleza, Ceará, Brazil Department of Chemistry and Chemical Biology,(More)