Identitätsentwicklung und Akkulturationsorientierungen junger Migranten aus der zweiten Generation

Verena StoxreiterZsfassung in engl. SpracheKlagenfurt, Alpen-Adria-Univ., Dipl.-Arb., 2012(VLID)240963

Theodor Fontane’s Notebooks: A ‘Digital Genetic-Critical and Commented Edition’

The scholarly digital edition of the Theodor Fontane: Notizbücher provides open access, for the first time, to the full scope of the 19th-century German writer’s notebooks. The project has a strong focus on the materiality of the documents, which is reflected not only in meticulous diplomatic transcriptions of Fontane’s notes, presented in their material contexts, but also in an extremely detailed documentation of the editorial principles and guidelines. The edition, thus, situates itself in an increased scholarly interest in materiality and mediality in the humanities since the ‘material turn’. Particularly, the edition contributes to a reassessment of the genre of the notebook as a portable “writing lab”. Notwithstanding these major achievements, questions remain regarding the present status and future development of the digital edition project, which was funded from 2011 to 2019. The edition interface is still a beta version and work on the scholarly commentary seems unfinished. This review ends with some specific suggestions on how to improve the digital edition’s accessibility and the reusability of its data

Rock fracture initiation and propagation by mechanical and hydraulic impact

Rock fracture due to high-pressure fluid jetting and insert indentation was experimentally investigated. In the frame of this article, indentation designates the process of pressing a tungsten carbide insert (TCI) for roller cone bits displacement-controlled into the rock surface. Under atmospheric conditions, several crystalline and one sedimentary rock type were tested. Depending on the size, type and bonding of the mineral grains, distinct differences in fracture behaviour were observed. The influence of elevated ambient pressure regimes on the evolving cracks and fractures in the tested granite revealed that microcracking ceases with increasing ambient pressure, while the specific energy is also significantly affected. Under similar conditions, indentation experiments were performed on undamaged samples and on samples containing jetted kerfs. A distinct variation in the measured maximum force and removed volume indicated different underlying rock fracture mechanisms. By applying methods for crack visualization and three-dimensional rendering, it turned out that the dimensions of the kerf significantly affected the mechanism of fracture initiation and propagation as well as the extent of the associated fracture pattern. Furthermore, the common practice of characterizing the rock excavation process only via measurable quantities such as the specific energy, without considering the created fracture pattern, yields misleading results

Full-scale experimental investigation of the performance of a jet-assisted rotary drilling system in crystalline rock

International audienc