Creep of web ribbons

Results are reported for work in high-temperature deformatin of dendritic web ribbons, and oxygen measurement in the material

The Receivers of Berenike. New Inscriptions from the 2015 Season

In diesem Artikel werden erstmals zwei neue griechische Weihinschriften veröffentlicht, die bei den Ausgrabungen 2015 in Berenike an der Küste des Roten Meers in Ägypten entdeckt wurden. Diese Inschriften bezeugen das Amt des «Empfängers» (παραλήπτης), der den Warenverkehr durch den Hafen kontrollierte. Hinzu kommt das erste explizite schriftliche Zeugnis für Isis lactans, die stillende Göttin Isis, τροφός. Dieser Typus ist ikonographisch durch Statuen und Münzen, in denen die Göttin ihren Sohn Horos-Harpokrates stillt, bereits häufig bezeugt. Darüber hinaus deutet die Erwähnung eines Sekretärs eines Gewürzmagazins (γραμματεὺς ἀποθήκης ἀπωματικῆς) auf die Existenz eines Magazins für orientalische Gewürze in Berenike hin. This article publishes two new Greek dedicatory inscriptions found during the 2015 excavation season at Berenike on the Red Sea coast of Egypt. The inscriptions offer new evidence for the office of Receiver (παραλήπτης), who was responsible for controlling the movement of goods through the harbor. In addition, a reference to Isis the nursing goddess, τροφός, provides the first explicit written evidence for Isis lactans, an iconographical type known from statuary and coins which depicts the goddess nursing her son Horos-Harpocrates. Moreover, mention of a secretary of the spice magazine (γραμματεὺς ἀποθήκης ἀπωματικῆς) points to the existence at the port of a storage facility for eastern spices. tbaCet article publie deux nouvelles dédicaces grecques trouvées à Bérénice sur la côte de la mer Rouge en Égypte au cours de la saison de fouilles de 2015. Les inscriptions offrent de nouvelles informations en ce qui concerne l’office de récepteur (παραλήπτης), responsable du contrôle de la circulation des biens au travers du port. De plus, une référence à Isis la déesse nourrissante, τροφός, fournit la première référence écrite à Isis lactans, un type iconographique connu par la statuaire et la monnaie qui dépeint la déesse allaitant son fils Horus-Harpocrates. Une mention d’un secrétaire des entrepôts d’épices (γραμματεὺς ἀποθήκης ἀπωματικῆς) indique l’existence d’une installation d’entreposage d’épices orientales dans le port.tb

Electrical, structural, and chemical characterization of silicon sheet materials

Progress on the electrical, structural, and chemical characterization of silicon sheet material is reported. In the study on high temperature deformation of dendritic web ribbon, experimental creep tests were performed in four point bending under constant load conditions, and unusual behavior was observed. Also, measurements of oxygen content in web ribbon were made. Two conclusions reached are creep behavior of web which is very different from any seen for single crystal silicon and oxygen level in web silicon which is near the saturation level at the melting point of silicon

An EBIC study of dislocation networks in unprocessed and unprocessed web silicon ribbon

Experimental techniques for the preparation of electron beam induced current samples of Web-dentritic silicon are described. Both as grown and processed material were investigated. High density dislocation networks were found close to twin planes in the bulk of the material. The electrical activity of these networks is reduced in processed material

Tracking primary thermalization events in graphene with photoemission at extreme timescales

Direct and inverse Auger scattering are amongst the primary processes that mediate the thermalization of hot carriers in semiconductors. These two processes involve the annihilation or generation of an electron-hole pair by exchanging energy with a third carrier, which is either accelerated or decelerated. Inverse Auger scattering is generally suppressed, as the decelerated carriers must have excess energies higher than the band gap itself. In graphene, which is gapless, inverse Auger scattering is instead predicted to be dominant at the earliest time delays. Here, $<8$ femtosecond extreme-ultraviolet pulses are used to detect this imbalance, tracking both the number of excited electrons and their kinetic energy with time- and angle-resolved photoemission spectroscopy. Over a time window of approximately 25 fs after absorption of the pump pulse, we observe an increase in conduction band carrier density and a simultaneous decrease of the average carrier kinetic energy, revealing that relaxation is in fact dominated by inverse Auger scattering. Measurements of carrier scattering at extreme timescales by photoemission will serve as a guide to ultrafast control of electronic properties in solids for PetaHertz electronics.Comment: 16 pages, 8 figure

A Meta-Analysis of Procedures to Change Implicit Measures

Using a novel technique known as network meta-analysis, we synthesized evidence from 492 studies (87,418 participants) to investigate the effectiveness of procedures in changing implicit measures, which we define as response biases on implicit tasks. We also evaluated these procedures’ effects on explicit and behavioral measures. We found that implicit measures can be changed, but effects are often relatively weak (|ds| \u3c .30). Most studies focused on producing short-term changes with brief, single-session manipulations. Procedures that associate sets of concepts, invoke goals or motivations, or tax mental resources changed implicit measures the most, whereas procedures that induced threat, affirmation, or specific moods/emotions changed implicit measures the least. Bias tests suggested that implicit effects could be inflated relative to their true population values. Procedures changed explicit measures less consistently and to a smaller degree than implicit measures and generally produced trivial changes in behavior. Finally, changes in implicit measures did not mediate changes in explicit measures or behavior. Our findings suggest that changes in implicit measures are possible, but those changes do not necessarily translate into changes in explicit measures or behavior

Bewegen in de toekomst: een trend verkenning

Een achtergrondstudie van maatschappelijke, ruimtelijke en technologische trends ten behoeve van de planvorming rond de as Haarlemmermeer-Almer