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We introduce a segmentation algorithm to probe the temporal organization of heterogeneities in human heartbeat interval time series. We find that the lengths of segments with different local mean heart rates follow a power-law distribution and show that this scale-invariant structure is not a simple consequence of the long-range correlations present in the data. The differences in mean heart ra...

Workflow management, one of the important technologies for supporting collaborative work, requires database technologies like distributed data management or transaction management. However, as workflow management systems have several heterogeneities like heterogeneity about agents, spatial heterogeneity, temporal heterogeneity, etc., collaboration model for workflow management should resolve th...

Work owmanagement, one of the important technologies for supporting collaborative work, requires database technologies like distributed data management or transaction management. However, as work ow management systems have several heterogeneities like heterogeneity about agents, spatial heterogeneity, temporal heterogeneity, etc., collaboration model for work ow management should resolve these ...

SFB 882 Working Papers are refereed scholarly papers. Submissions are reviewed by peers in a two-stage SFB 882 internal and external refereeing process before a final decision on publication is made. The Working Paper Series is a forum for presenting works in progress. Reviewers should communicate comments on the manuscript directly to the author(s). Whether fat or thin, male or female, young o...

Dynamical heterogeneities in a colloidal fluid close to gelation are studied by means of computer simulations. A clear distinction between some fast particles and the rest, slow ones, is observed yielding a picture of the gel composed of two populations with different mobilities. Analyzing the statics and dynamics of both sets of particles, it is shown that the slow particles form a network of ...

We present simulations of a hard disc system and analyze the time evolution of the dynamic heterogeneities. We characterize the time evolution of slow regions and slow particles individually. The motion of slow clusters turns out to be very restricted, i.e. a cluster is generated and annihilated in a spatial region four times the size of its maximum extent. The residual motion of the cluster ca...

We introduce topological methods for quantifying spatially heterogeneous dynamics, and use these tools to analyze particle-tracking data for a quasi-two-dimensional granular system of air-fluidized beads on approach to jamming. In particular, we define two overlap order parameters, which quantify the correlation between particle configurations at different times, based on a Voronoi construction...

Abstract Flocking models with metric and topological interactions are supposed to exhibit distinct features, as for instance the presence absence of moving polar bands. On other hand, quenched disorder (spatial heterogeneities) has been shown dramatically affect large-scale properties active systems interactions, while impact on metric-free remained, until now, unexplored. Here, we show that fl...