Relationships between environmental stressors and Cliff Swallow (Petrochelidon pyrrhonota) feather coloration and colony size

Cliff Swallows (Petrochelidon pyrrhonota) are aerial insectivores that experience mortality from vehicle collisions because they often nest and hunt under bridges and road culverts. Individual traits that may convey social information, such as body condition, or feather reflectance, may be associated with better coping around cars and other environmental stressors. Cliff swallow colony size may also be affected by environmental stressors. Our objective is to determine if proximity to roads and water level near the colony were related to wing length, body condition, colony size, and feather coloration in Cliff Swallows. We will do this by taking feather samples and measuring reflectance, and taking other body condition measurements, in addition to measuring colonies’ proximity to roads and level of water near the colonies’ locations

Elementary Teachers\u27 Nonverbal Immediacy Behaviors During Math Instruction

The purpose of this qualitative study was to describe elementary teachers’ nonverbal immediacy behaviors during math instruction. The instructional and non-instructional nonverbal behaviors of six female third, fourth, and fifth grade teachers were studied. Methods used included video recording math lessons, conducting one-on-one interviews, and reviewing relevant literature. Data analyses were completed through documenting major nonverbal behaviors displayed and identifying codes, categories, themes, and assertions (utilizing Excel spreadsheet software). The conceptual framework underlying this study has its foundation in phenomenology. As a research methodology, phenomenology investigates how an experience is lived by its participants. Immediacy was the construct used to describe teachers’ nonverbal behaviors during mathematics instruction. This overall framework supported the findings that arose from the data as it came forth from the six teacher participants. The following four themes emerged from the data analysis, including Classroom Environment and Instructional Elements; Math Nonverbal Immediacy Behaviors, Math Concepts, and Real-life Examples; Student Engagement; and Teachers\u27 Reflections and Realizations. These four themes led to two assertions. The first assertion was: “Student engagement during math lessons is interdependent with teachers’ nonverbal behaviors.” The second assertion was: “Teachers’ perceptions of their nonverbal behaviors are essential to the lesson content and instruction as well as intent to form immediacy with students.” Recommendations for teachers include the addition of nonverbal immediacy behavior training through professional development workshops or integration into preservice teacher courses, as well as the pairing of preservice teachers with in-service teachers who employ nonverbal immediacy behaviors. The impact of teachers’ heightened awareness of their nonverbal behaviors might impact current and future lessons and thus, student engagement

Bestandserhaltung mit System: Bestände-Priorisierung und Schadenserfassung

Aus Fördermitteln wurde im Jahr 2020 ein Projekt zur stichprobenartigen Schadensanalyse repräsentativer Teilbestände der Sondersammlungen der WLB Stuttgart finanziert. Ziel war die Erstellung einer plausiblen Datengrundlage zur stärkeren Systematisierung von Bestandserhaltungsmaßnahmen im Mengenverfahren (v.a. Trockenreinigung, Verpackung, Mengenentsäuerung). Mit einer Reihe von Kriterien und Berechnungsschlüsseln kam eine nachvollziehbare Auswahl und Rangfolge von Teilbeständen nach dem Maß der Priorisierung zustande

Erste Hilfe für Originale im Notfall

Vielen ist noch der Brand in der Anna-Amalia-Bibliothek Weimar oder der Einsturz des Stadtarchivs Köln in Erinnerung. Unvorhergesehene Wassereinbrüche, Feuer oder sogar ganze Gebäudeeinstürze können wertvolle Bestände von Kultureinrichtungen beschädigen und im schlimmsten Fall sogar vernichten. Viele Objekte des Kölner Archivs sind bis auf Briefmarkengröße zerfetzt worden, geborgene Bände der Anna-Amalia Bibliothek derart verkohlt und verblockt, dass an ein Blättern nicht mehr zu denken ist. Solche Katastrophen lassen sich nicht vorhersagen und kommen immer unangekündigt – und sie zeigen eindrücklich, wie notwendig es ist, sich auf Notfälle vorzubereiten und zu wappnen, um ein schnelles Handeln zu ermöglichen.&nbsp

”Hvis man både kan cykle og svare på sms’er på én gang, så er det jo nærmest ligesom at kunne trylle”: Cyklisters refleksioner over brug af mobiltelefoner i trafikken i Danmark og Nederlandene

Anvendelse af håndholdt mobiltelefon under cykling er forbudt ved lov i Danmark, imens det på tidspunktet for nærværende undersøgelse endnu var lovligt i Nederlandene. Gennem kvalitative interviews med cyklister i Danmark (n=9) og Nederlandene (n=10) undersøges cyklisters motiver, ræsonnementer og adfærd i forhold til brug af håndholdt og håndfri mobiltelefon under cykling. Herigennem identificeres specifikke anvendelsesformål og motivationer for at anvende og undlade at bruge mobiltelefon under cykling. Analysen viser at lovgivningen har indvirkning på nogle af deltagernes rationaler og risikoforståelse. Endvidere viser undersøgelsen, at det er relevant at se på både psykologiske og eksterne faktorer, for at forstå hvorfor cyklister anvender deres telefon i trafikken.&nbsp

Combining conductive atomic force microscopy with electrically detected magnetic resonance

We present the design and implementation of a scanning probe microscope, which combines electrically detected magnetic resonance (EDMR) and (photo-)conductive atomic force microscopy ((p)cAFM). The integration of a 3-loop 2-gap X-band microwave resonator into an AFM allows the use of conductive AFM tips as a movable contact for EDMR experiments. The optical readout of the AFM cantilever is based on an infrared laser to avoid disturbances of current measurements by absorption of straylight of the detection laser. Using amorphous silicon thin film samples with varying defect densities, the capability to detect a spatial EDMR contrast is demonstrated. Resonant current changes as low as 20 fA can be detected, allowing the method to realize a spin sensitivity of 8×106spins/√Hz at room temperature

Laser-sintered thin films of doped SiGe nanoparticles

We present a study of the morphology and the thermoelectric properties of short-pulse laser-sintered (LS) nanoparticle (NP) thin films, consisting of SiGe alloy NPs or composites of Si and Ge NPs. Laser-sintering of spin-coated NP films in vacuum results in a macroporous percolating network with a typical thickness of 300 nm. The Seebeck coefficient is independent of the sintering process and typical for degenerate doping. The electrical conductivity of LS films rises with increasing temperature, best described by a power-law and influenced by two-dimensional percolation effects.Comment: 4 pages, 4 figure

AJAM-A–tetraspanin–αvβ5 integrin complex regulates contact inhibition of locomotion

Contact inhibition of locomotion (CIL) is a process that regulates cell motility upon collision with other cells. Improper regulation of CIL has been implicated in cancer cell dissemination. Here, we identify the cell adhesion molecule JAM-A as a central regulator of CIL in tumor cells. JAM-A is part of a multimolecular signaling complex in which tetraspanins CD9 and CD81 link JAM-A to αvβ5 integrin. JAM-A binds Csk and inhibits the activity of αvβ5 integrin-associated Src. Loss of JAM-A results in increased activities of downstream effectors of Src, including Erk1/2, Abi1, and paxillin, as well as increased activity of Rac1 at cell–cell contact sites. As a consequence, JAM-A-depleted cells show increased motility, have a higher cell–matrix turnover, and fail to halt migration when colliding with other cells. We also find that proper regulation of CIL depends on αvβ5 integrin engagement. Our findings identify a molecular mechanism that regulates CIL in tumor cells and have implications on tumor cell dissemination.publishedVersio