"Weg mit dem Ungeziefer!": Hasskommentare aus Sicht der Nutzenden; Bewertung und Meldeverhalten

Hasskommentare in sozialen Medien und in den Kommentarbereichen von Nachrichtenwebseiten haben zu einer Debatte über inzivile Formen politischer Online-Partizipation geführt. Im vorliegenden Beitrag untersuchen wir, wie Devianzmerkmale und Neutralisierungstechniken in potenziellen Hasskommentaren die Bewertung und das Melden solcher Kommentare durch die Nutzenden beeinflussen. Dabei unterscheiden wir Kommentare nach Art der Normverletzung, Subtilität, Opfertyp und dem Vorhandensein von Rechtfertigungen oder Entschuldigungen. Ergebnisse einer Online-Befragung (n = 457), die ein wahlbasiertes Conjoint-Design beinhaltete, legen nahe, dass Gewaltaufrufe mit höherer Wahrscheinlichkeit gemeldet werden als Verschwörungstheorien, Gerüchte, Beleidigungen und Agitation. Direkte Normverstöße wurden häufiger gemeldet als indirekte Normverletzungen. Hasskommentare wurden eher akzeptiert, wenn sie eine Rechtfertigung oder Entschuldigung enthielten. Der Opfertyp hatte keinen Einfluss auf die Bewertung und das Melden von Hasskommentaren

Coupling of diagenetic alterations and mechanical properties of Lower Permian siliciclastic sandstones: a pilot study

Initial detrital composition and authigenic alterations during diagenesis of three sandstone types are related to their mechanical properties. Sandstones were prepared for geotechnical standard tests [density, uniaxial compressive strength (UCS), Young’s modulus (E), strain at failure (ε)] and thin sections for petrographic analyses (point counting). UCS ranges from 3 to 62 MPa and positively correlates with density (1.75–2.35 g/cm3) and E (0.3–12.7 GPa). Optical porosity is controlling these mechanical parameters and was linked to diagenetic alterations. Diagenetic alterations affecting porosity reduction are the abundance of clay minerals, and the intensity of mechanical and chemical compaction. The latter is controlled by clay mineral coatings on contacts between detrital grains, and the occurrence of authigenic quartz and dolomite. Horizontal contact lengths of grains normalized to their respective particle diameter (effective contact ratio, ECR) and porosity are identified as a control on the mechanical properties UCS and E, reflected by the rock strength index SR. The results of this pilot study suggest that SR is able to predict UCS and E based on petrographic information obtained from the studied samples. These results enhance the understanding of the coupling between mineralogy and geomechanics and highlight the impact of diagenesis on geomechanical behavior

Computing the bounded subcomplex of an unbounded polyhedron

We study efficient combinatorial algorithms to produce the Hasse diagram of the poset of bounded faces of an unbounded polyhedron, given vertex-facet incidences. We also discuss the special case of simple polyhedra and present computational results.Comment: 16 page

ToBI - Team of Bielefeld: The Human-Robot Interaction System for RoboCup@Home 2014

Ziegler L, Wittrowski J, Meyer zu Borgsen S, Wachsmuth S. ToBI - Team of Bielefeld: The Human-Robot Interaction System for RoboCup@Home 2014. Presented at the RoboCup 2014, João Pessoa, Brasil

ToBI-Team of Bielefeld The Human-Robot Interaction System for RoboCup@Home 2015

Meyer zu Borgsen S, Korthals T, Ziegler L, Wachsmuth S. ToBI-Team of Bielefeld The Human-Robot Interaction System for RoboCup@Home 2015. Presented at the RoboCup 2015, Hefei, China

ToBI-Team of Bielefeld The Human-Robot Interaction System for RoboCup@Home 2015

Meyer zu Borgsen S, Korthals T, Ziegler L, Wachsmuth S. ToBI-Team of Bielefeld The Human-Robot Interaction System for RoboCup@Home 2015. Presented at the RoboCup 2015, Hefei, China

Wafer-level uniformity of atomic-layer-deposited niobium nitride thin films for quantum devices

Superconducting niobium nitride thin films are used for a variety of photon detectors, quantum devices, and superconducting electronics. Most of these applications require highly uniform films, for instance, when moving from single-pixel detectors to arrays with a large active area. Plasma-enhanced atomic layer deposition (ALD) of superconducting niobium nitride is a feasible option to produce high-quality, conformal thin films and has been demonstrated as a film deposition method to fabricate superconducting nanowire single-photon detectors before. Here, we explore the property spread of ALD-NbN across a 6-in. wafer area. Over the equivalent area of a 2-in. wafer, we measure a maximum deviation of 1% in critical temperature and 12% in switching current. Toward larger areas, structural characterizations indicate that changes in the crystal structure seem to be the limiting factor rather than film composition or impurities. The results show that ALD is suited to fabricate NbN thin films as a material for large-area detector arrays and for new detector designs and devices requiring uniform superconducting thin films with precise thickness control