The long term storage of hospital clinical records is becoming a big problem. A great reduction in the bulk of case notes can be achieved by compartmentalizing unstructured case notes. Such a system has many advantages for medical staff, and its widespread use would do much to alleviate storage problems in future years.

We report on ongoing experimental work on evaluating test sets for testing modal satisfiability solvers. Our longterm aim is to understand the difference between the use of structured and of unstructured randomly generated problems. Which parts of the problem space do they explore?

We present a complete specification of a new benchmark for measuring the performance of modern computer systems when solving scientific problems featuring irregular, dynamic memory accesses. It complements the existing NAS Parallel Benchmark suite. The benchmark involves the solution of a stylized heat transfer problem in a cubic domain, discretized on an adaptively refined, unstructured mesh.

The package contains ANSI C software with Matlab mex interface for structured total least squares estimation problems. The allowed structures in the data matrix are block-Toeplitz, block-Hankel, unstructured, and noise free. Combinations of blocks with this structures can be specified. The computational complexity of the algorithms is O(m), where m is the sample size.

Many problems in engineering, chemistry and physics require the representation of solutions in complex geometries. In the paper we deal with a problem of unstructured mesh generation for the control volume method. We propose an algorithm which bases on the spheres generation in central points of the control volumes.

New concepts are described to SSM (Soft Systems Methodology) conceptual models, which are tools for system analysis supporting the application of simulation including decisions about parallel simulation in an organisational environment. A meta-methodology facing with unstructured problems in simulation projects and also supporting parallel simulation is formulated.

A stable hybrid method for hyperbolic problems that combines the unstructured finite volume method with high-order finite difference methods has been developed. The coupling procedure is based on energy estimates and stability can be guaranteed. Numerical calculations verify that the hybrid method is efficient and accurate.

The program package UG provides a software platform for discretizing and solving partial diierential equations. It supports high level numerical methods for unstructured grids on massively parallel computers. Various applications of complex up to real-world problems have been realized, like Navier-Stokes problems with turbulence modeling, combustion problems, two-phase ow, density driven ow and...

Many problems can be formulated as search problems over a solution space S.17 That is, find the x 2 S such that some predicate P (x) is true. For example, hard problems such as the Hamiltonian path problem and Boolean satisfiability can be formulated this way. An unstructured search problem is a problem that makes no assumptions about the structure of the search space, or for which there is no ...