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In the traditional two-rack distributed storage system (DSS) model, due to the assumption that the storage capacity of each node is the same, the minimum bandwidth regenerating (MBR) point becomes infeasible. In this paper, we design a new non-homogeneous two-rack model by proposing a generalization of the threshold function used to compute the tradeoff(More)
We investigate Berlekamp's negacyclic codes and discover that these codes, when considered over the integers modulo 4, do not suffer any of the restrictions on the minimum distance observed in Berlekamp's original papers [2, 3]. We present an algebraic decoding algorithm for this class of codes that corrects any error pattern of Lee weight ≤ t. Our(More)
• Optimality of a 2-identifying code in the hexagonal grid Ville Junnila, Tero Laihonen • The Dual Code of Points and t-Spaces in the Projective Space Maarten De Boeck • Optimal arcs in three-dimensional Hjelmslev spaces
Recently, new families of quaternary linear Reed-Muller codes have been introduced. They satisfy that, after the Gray map, the corresponding \BBZ<sub>4</sub>-linear codes have the same parameters and properties as the codes of the binary linear Reed-Muller family. A structural invariant, the dimension of the kernel, for binary codes is used to classify(More)
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