Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.7k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2.4k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR2.3k papers
- Charles UniversityCZ2.3k papers
- Institute for High Energy PhysicsES2.3k papers
- Institut de Recherche sur les Lois Fondamentales de l'UniversFR2.2k papers
- The Ohio State UniversityUS2.1k papers
- Universidad Autónoma de MadridES2.1k papers
- Rutherford Appleton LaboratoryGB2.1k papers
- European Organization for Nuclear ResearchCH2.1k papers
- University of Wisconsin–MadisonUS2.1k papers
- Joint Institute for Nuclear ResearchRU2k papers
31 papers · 2 filters
Thermodynamically Important Contacts in Folding of Model Proteins
Antonio Scala, Nikolay V. Dokholyan, Sergey V. Buldyrev +1
We introduce a quantity, the entropic susceptibility, that measures the thermodynamic importance-for the folding transition-of the contacts between amino acids in model proteins. U…
The Dynamics of Efficiency: A Simple Model
S. N. Majumdar, P. L. Krapivsky
We propose a simple model that describes the dynamics of efficiencies of competing agents. Agents communicate leading to increase of efficiencies of underachievers, and an efficien…
Inherent-Structure Dynamics and Diffusion in Liquids
T. Keyes, J. Chowdhary
The self-diffusion constant D is expressed in terms of transitions among the local minima of the potential (inherent structure, IS) and their correlations. The formulae are evaluat…
Characterization of Sleep Stages by Correlations of Heartbeat Increments
Jan W. Kantelhardt, Yosef Ashkenazy, Plamen Ch. Ivanov +5
We study correlation properties of the magnitude and the sign of the increments in the time intervals between successive heartbeats during light sleep, deep sleep, and REM sleep us…
Degree Distributions of Growing Networks
P. L. Krapivsky, G. J. Rodgers, S. Redner
The in-degree and out-degree distributions of a growing network model are determined. The in-degree is the number of incoming links to a given node (and vice versa for out-degree.…
Noise Effects on the Complex Patterns of Abnormal Heartbeats
Verena Schulte-Frohlinde, Yosef Ashkenazy, Plamen Ch. Ivanov +3
Patients at high risk for sudden death often exhibit complex heart rhythms in which abnormal heartbeats are interspersed with normal heartbeats. We analyze such a complex rhythm in…
Organization of Growing Random Networks
P. L. Krapivsky, S. Redner
The organizational development of growing random networks is investigated. These growing networks are built by adding nodes successively and linking each to an earlier node of degr…
Infiltration through porous media
W. Hwang, S. Redner
We study the kinetics of infiltration in which contaminant particles, which are suspended in a flowing carrier fluid, penetrate a porous medium. The progress of the ``invader'' par…
Statistical Properties of Share Volume Traded in Financial Markets
Parameswaran Gopikrishnan, Vasiliki Plerou, Xavier Gabaix +1
We quantitatively investigate the ideas behind the often-expressed adage `it takes volume to move stock prices', and study the statistical properties of the number of shares traded…
Fate of Zero-Temperature Ising Ferromagnets
V. Spirin, P. L. Krapivsky, S. Redner
We investigate the relaxation of homogeneous Ising ferromagnets on finite lattices with zero-temperature spin-flip dynamics. On the square lattice, a frozen two-stripe state is app…
The Free Energy Surface of Supercooled Water
A. Scala, F. W. Starr, E. La Nave +2
We present a detailed analysis of the free energy surface of a well characterized rigid model for water in supercooled states. We propose a functional form for the liquid free ener…
Fragmentation with a Steady Source
E. Ben-Naim, P. L. Krapivsky
We investigate fragmentation processes with a steady input of fragments. We find that the size distribution approaches a stationary form which exhibits a power law divergence in th…
Extremal Paths on a Random Cayley Tree
Satya N. Majumdar, P. L. Krapivsky
We investigate the statistics of extremal path(s) (both the shortest and the longest) from the root to the bottom of a Cayley tree. The lengths of the edges are assumed to be indep…
Traveling Waves, Front Selection, and Exact Nontrivial Exponents in a Random Fragmentation Problem
P. L. Krapivsky, Satya N. Majumdar
We study a random bisection problem where an initial interval of length x is cut into two random fragments at the first stage, then each of these two fragments is cut further, etc.…
Ballistic Annihilation
Paul L. Kaprivsky, Clément Sire
Ballistic annihilation with continuous initial velocity distributions is investigated in the framework of Boltzmann equation. The particle density and the rms velocity decay as $c=…
Scale Invariance in the Nonstationarity of Physiological Signals
Pedro Bernaola-Galvan, Plamen Ch. Ivanov, Luis A. Nunes Amaral +2
We introduce a segmentation algorithm to probe temporal organization of heterogeneities in human heartbeat interval time series. We find that the lengths of segments with different…
Quantifying Nonstationary Radioactivity Concentration Fluctuations Near Chernobyl: A Complete Statistical Description
G. M. Viswanathan, S. V. Buldyrev, E. K. Garger +5
We analyze nonstationary Cs atmospheric activity concentration fluctuations measured near Chernobyl after the 1986 disaster and find three new results: (i) the histogram of…
Hierarchical organization of cities and nations
G. Malescio, N. V. Dokholyan, S. V. Buldyrev +1
Universality in the behavior of complex systems often reveals itself in the form of scale-invariant distributions that are essentially independent of the details of the microscopic…
Entropy, Dynamics and Instantaneous Normal Modes in a Random Energy Model
Tom Keyes
It is shown that the fraction f of imaginary frequency instantaneous normal modes (INM) may be defined and calculated in a random energy model(REM) of liquids. The configurational…
Magnitude and Sign Correlations in Heartbeat Fluctuations
Yosef Ashkenazy, Plamen Ch. Ivanov, Shlomo Havlin +3
We propose an approach for analyzing signals with long-range correlations by decomposing the signal increment series into magnitude and sign series and analyzing their scaling prop…
Connectivity of Growing Random Networks
P. L. Krapivsky, S. Redner, F. Leyvraz
A solution for the time- and age-dependent connectivity distribution of a growing random network is presented. The network is built by adding sites which link to earlier sites with…
Flow Between Two Sites on a Percolation Cluster
José S. Andrade, Sergey V. Buldyrev, Nikolay V. Dokholyan +5
We study the flow of fluid in porous media in dimensions and 3. The medium is modeled by bond percolation on a lattice of sites, while the flow front is modeled by trac…
Stochastic Aggregation: Scaling Properties
E. Ben-Naim, P. L. Krapivsky
We study scaling properties of stochastic aggregation processes in one dimension. Numerical simulations for both diffusive and ballistic transport show that the mass distribution i…
Stochastic Aggregation: Rate Equations Approach
P. L. Krapivsky, E. Ben-Naim
We investigate a class of stochastic aggregation processes involving two types of clusters: active and passive. The mass distribution is obtained analytically for several aggregati…