108 research outputs found
Wider das Vergessen. Partizipative Erinnerungs- und Bildungsarbeit der Initiative Gedenkweg-Buchenwaldbahn
Christian Molitor stellt die Initiative Gedenkweg-Buchwaldbahn vor und erläutert anschaulich wie mittels partizipativer Erinnerungs- und Bildungsarbeit das Gedenken und Erinnern altersgerecht ermöglicht werden kann. (DIPF/Orig.
Shadow banking in the euro area: risks and vulnerabilities in the investment fund sector
This paper first highlights the structural features of shadow banking in the euro area, focussing on investment funds. It then discusses the potential systemic risks that the recent expansion of the investment fund sector presents. While investment funds provide important intermediation services to the real sector, including market and liquidity risk-sharing and the bridging of information gaps, their rapid expansion may present systemic risks that need to be detected, monitored and managed. In particular, the risk of fund outflows and the possible negative impacts on the wider financial system have risen due to the rapid expansion of the investment fund sector, its growing involvement in capital markets, its use of synthetic leverage, and the inherent and growing maturity and liquidity mismatch arising from the demandable nature of fund share investments. While available data suggest that vulnerabilities within the investment fund sector are growing and links to the wider financial system and real economy have strengthened, data limitations prevent drawing a definitive conclusion on the sectors' contribution to systemic risk
Tool Wear Segmentation in Blanking Processes with Fully Convolutional Networks based Digital Image Processing
The extend of tool wear significantly affects blanking processes and has a
decisive impact on product quality and productivity. For this reason, numerous
scientists have addressed their research to wear monitoring systems in order to
identify or even predict critical wear at an early stage. Existing approaches
are mainly based on indirect monitoring using time series, which are used to
detect critical wear states via thresholds or machine learning models.
Nevertheless, differentiation between types of wear phenomena affecting the
tool during blanking as well as quantification of worn surfaces is still
limited in practice. While time series data provides partial insights into wear
occurrence and evolution, direct monitoring techniques utilizing image data
offer a more comprehensive perspective and increased robustness when dealing
with varying process parameters. However, acquiring and processing this data in
real-time is challenging. In particular, high dynamics combined with increasing
strokes rates as well as the high dimensionality of image data have so far
prevented the development of direct image-based monitoring systems. For this
reason, this paper demonstrates how high-resolution images of tools at 600 spm
can be captured and subsequently processed using semantic segmentation deep
learning algorithms, more precisely Fully Convolutional Networks (FCN). 125,000
images of the tool are taken from successive strokes, and microscope images are
captured to investigate the worn surfaces. Based on findings from the
microscope images, selected images are labeled pixel by pixel according to
their wear condition and used to train a FCN (U-Net)
Swiss National Registry on Catheter Ablation Procedures: Changing Trends over the Last 20 Years
The Swiss Ablation Registry provides a national database for electrophysiologic studies and catheter ablations. We analyzed the database to provide an in-depth look at changing trends over the last 20 years. During the study period a total of 78622 catheter ablations (age 61.0 ± 1.2 years; 63.7% male) were performed in 29 centers. The number of ablations increased by approximately ten-fold in 20 years. Ablation for atrial fibrillation (AF) was the main driver behind this increase, with more than hundred-fold (39.7% of all ablations in 2019). Atrioventricular-nodal-reentrant-tachycardia (AVNRT) and accessory pathways, being the main indications for ablation in 2000 (44.1%/25.1%, respectively), made up of only a small proportion (15.2%/3.5%,) respectively in 2019. Fluoroscopy, ablation, and procedure durations were reduced for all ablations over time. The highest repeat ablations were performed for ventricular tachycardia and AF (24.4%/24.3%). The majority of ablations (63.0%) are currently performed in private hospitals and non-university public hospitals whereas university hospitals had dominated (82.4%) at the turn of the century. A pronounced increase in the number of catheter ablations in Switzerland was accompanied by a marked decrease in fluoroscopy, ablation, and procedure durations. We observed a shift toward more complex procedures in older patients with comorbidities
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