Baseline Detection in Historical Documents using Convolutional U-Nets

Baseline detection is still a challenging task for heterogeneous collections of historical documents. We present a novel approach to baseline extraction in such settings, turning out the winning entry to the ICDAR 2017 Competition on Baseline detection (cBAD). It utilizes deep convolutional nets (CNNs) for both, the actual extraction of baselines, as well as for a simple form of layout analysis in a pre-processing step. To the best of our knowledge it is the first CNN-based system for baseline extraction applying a U-net architecture and sliding window detection, profiting from a high local accuracy of the candidate lines extracted. Final baseline post-processing complements our approach, compensating for inaccuracies mainly due to missing context information during sliding window detection. We experimentally evaluate the components of our system individually on the cBAD dataset. Moreover, we investigate how it generalizes to different data by means of the dataset used for the baseline extraction task of the ICDAR 2017 Competition on Layout Analysis for Challenging Medieval Manuscripts (HisDoc). A comparison with the results reported for HisDoc shows that it also outperforms the contestants of the latter.Comment: 6 pages, accepted to DAS 201

Aenderungen der Korngrenzensegregation, des Gefueges und der Zaehigkeit von 12% Cr-Staehlen bei langzeitigem Einsatz bei erhoehter Temperatur

Das Ziel dieser Arbeit waren Untersuchung zur Korngrenzensegregation von Verunreinigungselementen zu Veraenderungen der Mikrostruktur und deren Einfluss auf die Zaehigkeit von 12% Cr-Staehlen bei langzeitigem Einsatz bei erhoehter Temperatur. Zur Untersuchung der Korngrenzensegregation wurden Auger-elektronenspektroskopische Untersuchungen an langzeitig ausgelagerten Stahlproben aus dem industriellen Einsatz durchgefuehrt. Hierzu wurden Stahlproben im UHV unter Kuehlung bei ca. -120 C gebrochen, auf diese Weise wurde ein sproeder Bruch entlang von Korngrenzen erzielt und die Korngrenzen konnten mit Hilfe der AES untersucht werden. Es wurde gefunden, dass sich Phosphor als Verunreinigungselement durch Segregation an den Korngrenzen anreichert. (orig.)The paper aimed at examining grain-boundary segregation of impurity elements; changes in the microstructure and their influence on the toughness of 12% Cr steels during long-term use at increased temperatures. To study grain-boundary segregation, auger electron spectroscopic examinations were performed at long-time exposed steel specimens from industrial applications. For that purpose, steel specimens in UHV were cooled down to about -120 C and fractured. Thus a brittle fracture along the grain boundaries was achieved, and the grain boundaries could be examined by means of AES. It was found that phosphorus as an impurity element concentrated at the grain boundaries by segregation. (orig.)SIGLEAvailable from TIB Hannover: MA 7400 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Kurzer theoretischer Unterricht im gregorianischen oder Choral-Gesange : für Seminarien, Organisten und Chordirigenten ; nebst einer geschichtlichen Einleitung

von A. Mackenbroc

Motivational Effects of Digital Media on Students in Physical Education - a Scoping Review.

This is a registration for a Scoping Review titled: Motivational Effects of Digital Media on Students in Physical Education - a Scoping Review

Mentale Modelle und Vertrauensbildung: Eine wirtschaftsethische Analyse

Vertrauen ist ein äußerst vielschichtiges und sehr komplexes Phänomen. Es zeichnet sich dadurch aus, dass es zwar jedem Menschen aus seiner Alltagserfahrung bekannt ist, theoretisch jedoch nicht so leicht greifbar zu sein scheint. Dabei ist Vertrauen in verschiedenen Wissenschaftsdisziplinen, insbesondere der Psychologie, der Soziologie und der Ökonomik, bereits häufig Gegenstand unterschiedlicher Untersuchungen gewesen. Unbestritten ist, dass Vertrauen für das Zustandekommen von Kooperationen eine hohe Bedeutung hat. Das Eingehen von Kooperationen zwischen Menschen oder korporativen Akteuren ist nämlich nicht selbstverständlich. Wenn man von der Überlegung ausgeht, dass Akteure nicht nur gemeinsame, sondern immer auch gegensätzliche Interessen verfolgen, wird Kooperation zu einem durchaus erklärungsbedürftigen Phänomen

Erstellung eines allgemein verfuegbaren Gewaesserguetemodells. T. 3 Erftverband. Abschlussbericht

Available from TIB Hannover: F96B1251+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Automatic Quantitative Assessment of Lens Opacities Using Two Anterior Segment Imaging Techniques: Correlation with Functional and Surgical Metrics

The purpose of this study is to quantitatively assess lens opacity, using a swept-source optical coherence tomography (SS-OCT) device for anterior segment assessment, and establish the correlation with Scheimpflug imaging, corrected distance visual acuity (CDVA) and cumulative dissipated energy (CDE). This prospective cross-sectional single-center study enrolled 51 patients (51 eyes) with crystalline lens opacity. Patients with previous ocular surgery, pathologies or general disorders affecting vision were excluded. Eyes were scanned with an SS-OCT device, and lens densitometry was automatically analyzed using a custom MATLAB script which examined lens density, nuclear density and linear density. The same analyses were performed on Scheimpflug images. Preoperative CDVA and CDE during phacoemulsification were recorded. Spearman’s (ρ) and Pearson’s (r) correlation coefficients were assessed according to data normality. Statistically significant correlations were established between SS-OCT and Scheimpflug imaging using lens analysis (ρ = 0.47, p < 0.001), nuclear analysis (ρ = 0.73, p < 0.001) and linear analysis (r = 0.44, p < 0.001). A significant correlation with CDE was found with all the SS-OCT methods (r = 0.57, p < 0.001). Only the nuclear analysis of the SS-OCT scans (Tb = −0.33, p < 0.01) and Pentacam Nucleus Staging (Tb = −0.26, p < 0.05) showed a statistically significant correlation with CDVA. Good inter-device agreement in lens densitometry was found. However, SS-OCT yielded improved lens imaging compared with the Scheimpflug device and a higher correlation with clinical parameters. Thus, high-resolution SS-OCT has the potential to become a preferable option for automatic cataract grading and preoperative planning