Learning to share and sharing to learn – professionaldevelopment of language teachers in HE to foster open educational practices

This case study presents the staff-development perspective of the ‘Collaborative Writing and Peer Review Project’ developed at the Department of Languages, at the Open University, UK, between November 2011 and March 2012. The project was set up to promote the professional development of teachers through collaborative writing and peer review, encouraging open educational practices (OEP) and by extension the production and publication of teaching resources in an open repository. As teacher developers working in a blended environment, the authors facilitate opportunities for sharing and developing good practice as part of a broad staff development programme to help teachers understand and integrate innovative approaches into their practice. Participants in this project brought with them a range of experiences as practitioners from their work with language students both at and outside the University. This case study focuses on the professional development aspect of this initiative. It presents the different aspects of the process and analyses teachers’ involvement with social online tools and the impact on teaching practice of engaging with the process of collaboration

Computer program calculates gamma ray source strengths of materials exposed to neutron fluxes

Computer program contains an input library of nuclear data for 44 elements and their isotopes to determine the induced radioactivity for gamma emitters. Minimum input requires the irradiation history of the element, a four-energy-group neutron flux, specification of an alloy composition by elements, and selection of the output

Apsidal Motion of the Massive, Benchmark Eclipsing Binary V578 Mon

V578 Mon is a system of two early B-type stars in the Rosette Nebula star-forming region (NGC 2244), and is one of only nine eclipsing binaries with component masses greater than 10 M\odot whose physical parameters have been determined with an accuracy of better than 3%. It is therefore a benchmark system for evolutionary and stellar structure models of newly formed massive stars. Combining our multi-band light curves spanning 40 yr with previous light curve data from the literature, we fit a model light curve that for the first time includes the effects of apsidal motion of the system. We measure an apsidal period of 33.48+0.10-0.06 yr. As a consequence of incorporating the apsidal motion into the modeling of the system's orbital parameters, we determine an updated eccentricity of e = 0.07755+0.00022-0.00027, which differs significantly from the value previously reported in the literature. Evidently, the inclusion of apsidal motion in the light curve modeling significantly affects the eccentricity determination. Incorporating these key parameters into a comprehensive model of the system's physical parameters-including internal structure constraints- will bring V578 Mon to the next level of benchmark precision and utility.Comment: 17 pages, 7 figures, to appear in the Astronomical Journa

B-R bei 103 langperiodisch Veränderlichen : mit 2 Tabellen

Für 103 langperiodisch Veränderliche werden B-R, im wesentlichen aus AAVSO-Material, in Diagrammen dargestellt. Ein Zusammenhang zwischen Form der lichtkurve und Entwicklung der B-R besteht offenbar nicht. Möglicherweise sind geringe Streuung und ausgeprägte Zickzackform der B-R Indikatoren sprunghafter Periodenänderungen.The author presents 103 O-C diagrams of long period variable stars, essentially based on AAVSO observation al material. The LUDENDORFF classification of light curves is compared with quantitative parameters of mean light curves. Obviously, no positive correlation be introduced between form of the mean light curve and O-C pattern. Possibly, some variables with little scattering and strongly zigzagging O-C are candidates for realperiod changes

Die Sternwarte des Naturwissenschaftlichen Vereins auf dem Oldendorfer Berg

Die Astronomische Arbeitsgemeinschaft im Naturwissenschaftlichen Verein Osnabrück hat auf dem Oldendorfer Berg bei Meile in fünf jähriger Bauzeit eine neue Sternwarte errichtet. Das Hauptinstrument ist ein Cassegrainspiegel von 60 cm Durchmesser und einer Brennweite von 7,20 m

Komet Hale-Bopp auf dem Oldendorfer Berg

In der Zeit vom 5.9.96 bis 2.5.97 wurden die Veränderungen in der inneren Koma von Hale-Bopp in einem Gesichtsfeld von 3x4 Bogenminuten mit dem 60 cm Cassegrain der Sternwarte des Naturwissenschaftlichen Vereins Osnabrück und einer ST-6 von SBIG ohne Filter beobachtet.A set of CCO-frames, made with the 60 cm Cassegrain of the Observatory of the Natural Science Association Osnabrück and a SBIG ST-6 without filters, shows strong variations in the inner coma of Hale-Bopp in a 3x4 arc minutes wide field

Lichtelektrische Beobachtungen kurzperiodisch veränderlicher Sterne

Mit einem Photometer, das von Herrn ALEXANDER SCHNITZER, Erlangen, zur Verfügung gestellt wurde, können in der Astronomischen Arbeitsgemeinschaft des Naturwissenschaftlichen Vereins Osnabrück lichtelektrische Messungen durchgeführt werden. Das Gerät ist mit einer EMI 9781 B-Röhre ausgestattet, deren maximale spektrale Empfindlichkeit bei 3000 Angström liegt. Die Röhre wird mit einer Spannung von 700-900 Volt betrieben. Das Ablesen der Meßwerte erfolgt analog an einem Mikroampèremeter. ..