BACKGROUND Observation is used in research in two ways - structured and unstructured. Which of these methods to choose depends on the research question but will be defined predominantly by the paradigm underlying each study. Positivistic research generally uses structured observation and interpretist/naturalistic paradigms use unstructured observation. This paper is concerned with unstructured ...

With the dramatic proliferation of case based reasoning sys tems in commercial applications many case bases are now becoming legacy systems They represent a signi cant portion of an organization s assets but they are large and di cult to maintain One of the contribut ing factors is that these case bases are often large and yet unstructured they are represented in natural language text Adding to...

Backward errors and condition numbers are defined and evaluated for eigenvalues and eigenvectors of generalized eigenvalue problems. Both normwise and componentwise measures are used. Unstructured problems are considered first, and then the basic definitions are extended so that linear structure in the coefficient matrices (for example, Hermitian, Toeplitz, Hamiltonian, or band structure) is pr...

A family of inexpensive discretization schemes for diffusion problems on unstructured polygonal and polyhedral meshes is introduced. The material properties are described by a full tensor. The theoretical results are confirmed with numerical experiments.