Block-intersection graphs of Steiner triple systems are considered. We prove that the block-intersection graphs of non-isomorphic Steiner triple systems are themselves non-isomorphic. We also prove that each Steiner triple system of order at most 15 has a Hamilton decomposable block-intersection graph.

Many applications require the solution of multiple linear systems that have the same coeecient matrix, but diier in their right-hand sides. Instead of applying an iterative method to each of these systems individually, it is more eecient to employ a block version of the method that generates iterates for all the systems simultaneously. In this paper, we propose a block version of Freund and Nac...

This paper presents a block library for Matlab/Simulink that allows fast prototyping of reconfigurable DSP systems. Up till now no similar software package was available. The block library supports the construction of reconfigurable discrete time linear and non-linear systems from reconfigurable digital filters using various filter structures, state-space form implementations, polynomial filter...

Block-level distributed storage systems (e.g., SAN, iSCSI) are commonly used in the emerging cloud computing systems to provide virtual machine (VM) storage. They allow fast VM migration across different hosts and improved VM availability leveraging typical faulttolerance measures (e.g., RAID) available in such storage systems. However, as the size of cloud systems and the number of hosted VMs ...

For MinRes and SymmLQ it is essential to compute a QR decomposition of a tridiagonal coefficient matrix gained in the Lanczos process. This QR decomposition is constructed by an update scheme applying in every step a single Givens rotation. Using complex Householder reflections we generalize this idea to block tridiagonal matrices that occur in generalizations of MinRes and SymmLQ to block meth...

This paper presents a dynamic observer for a class of simple mechanical systems on Lie groups, that provides velocity estimates based on configuration measurements. The observer is intrinsic, so its performance does not depend on the choice of coordinates, and it is coordinate free, in the sense that the equations may be written explicitly without specifying coordinates for the configuration sp...