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Bonding, structure, and stability of Na n Phe m n clusters: some surprising results from an experimental and theoretical investigation in gas phase
(Hindawi Publishing Corporation, 2018)
Evolutionary k-means for distributed data sets
(ElsevierAmsterdam, 2014-03-15)
One of the challenges for clustering resides in dealing with data distributed in separated repositories, because most clustering techniques require the data to be centralized. One of them, k-means, has been elected as one ...
Fuzzy clustering algorithms and validity indices for distributed data
(SpringerCham, 2015)
This chapter presents a unified framework to generalize a number of fuzzy clustering algorithms to handle distributed data in an exact way, i.e., with no approximation of results with respect to their original centralized ...
Clustering and percolation theory for continuum systems: Clusters with nonspecific bonds and a residence time in their definition
(Elsevier Science, 2017-11)
In this article, dedicated to the memory of Lesser Blum, we develop a theory for the physical clusters which were introduced some time ago in our group (J. Chem Phys. 116, 1097–1108, 2002). The physical cluster definition ...
The clusters Abell 222 and Abell 223: a multi-wavelength view
(EDP SCIENCES S A, 2010)
Context. The Abell 222 and 223 clusters are located at an average redshift z similar to 0.21 and are separated by 0.26 deg. Signatures of mergers have been previously found in these clusters, both in X-rays and at optical ...
Specific Frequencies and Luminosity Profiles of Cluster Galaxies and Intracluster Light in Abell 1689
(IOP PUBLISHING LTD, 2017)
We present magnitudes and profile fits for 180 galaxies in the central field of the massive lensing cluster Abell 1689 using very deep imaging with the Hubble Space Telescope Advanced Camera for Surveys in the F814W bandpass. ...