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Multidimensional data are the foundation for OLAP applications. They can be provided in several ways: relational OLAP, multidimensional OLAP, or hybrid OLAP. The usage of the underlying technology, which is well understood and in most cases formally defined, does not resolve the issue of a missing vocabulary for multidimensional data on a conceptual level. Some basic definitions are broadly used;...
This paper presents the case of Arinia, a custom-made piece of social software with strong similarities to today's microblogging applications. Arinia has been in use in a medium-sized technology company for more than 10 years; therefore, it is considered that the software is a valuable source of insights into the underlying principles of microblogging in an enterprise context. Due to the unique nature...
Modern enterprise reporting portals commonly address the information needs of top management executives. With the advent of pervasive business intelligence systems other, larger, groups of users are moving into the focus of system designers. Along with them specific design requirements surface - transforming design considerations of prior efforts targeting management reporting needs. Owing to vast...
We investigated surface reconstructions induced by monolayer coverages of Cu on Ge(111) using scanning tunneling microscopy (STM) at room temperature (RT) and 50 K. Following annealing to moderate temperatures (≈ 100°C) a discommensurate, two-dimensional domain superlattice with hexagonal symmetry is observed. Within the domains, atomic resolution showing a hexagonal arrangement of surface atoms with...
We investigated the adsorbate system Ge(111):In with low energy electron diffraction and scanning tunneling microscopy. Several coverage-driven phase transitions accompanied by a distinct change in symmetry of the surface reconstruction were observed. At coverages around 0.05 monolayer (ML) the surface reconstruction changes from a disturbed c(2 × 8) to an almost hexagonal phase with (2 × 2) domains...
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