Understanding the risks caused by relying on information systems is an enduring research stream in the Information Systems (IS) discipline. With information systems becoming ubiquitous, IS risks ...permeate every aspect of life and effective risk mitigation increasingly requires a holistic structure. We use the largest and oldest publicly available risk collection to understand the developments of IS risks, its characteristics, and interdependencies. We review this data set using text mining techniques. Interestingly, we find that some types of IS risks tend to reoccur. We find that this database provides rich opportunities for learning from previous mistakes, which could help avoid similar problems in the future. Our contributions to theory includes a risk-taker's view on contemporary information systems, a differentiation between controllable and reoccurring risks, and the increased interconnection of IS risks. As implications for practice we provide a basis for learning from past IS risks and an initial structure.
We describe the specific features of electroconvection (EC) in the nematic liquid crystal (NLC) phase with short-range smectic C order (the seventh homologue of the p,n-alkyloxybenzoic acid, 7OBA, ...which is dimeric). These features are revealed below a definite temperature (T*) within this liquid crystal phase. By polarisation analysis of the azimuthal in-plane director deflection in the EC regime we suggest that this instability has a twist-type character. We indicate that the specificity of the temperature variation of the electroconductivity and the EC in 7OBA is determined by the smectic tilt angle magnitude and the dimer's compactness within the supramolecular complexes. We find that response times below T* are about two times shorter than those in classical NLCs, as an equalisation of both response and decay times, which is preferable in LC display techniques. A fourth frequency harmonic is detected for the first time in the N state.
