Narrative Strategies in Benedikte Naubert's Neue Volksmarchen der Deutschen

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The slopes determined by n points in the plane

Let $m_{12}$, $m_{13}$, ..., $m_{n-1,n}$ be the slopes of the $\binom{n}{2}$ lines connecting $n$ points in general position in the plane. The ideal $I_n$ of all algebraic relations among the $m_{ij}$ defines a configuration space called the {\em slope variety of the complete graph}. We prove that $I_n$ is reduced and Cohen-Macaulay, give an explicit Gr\"obner basis for it, and compute its Hilbert series combinatorially. We proceed chiefly by studying the associated Stanley-Reisner simplicial complex, which has an intricate recursive structure. In addition, we are able to answer many questions about the geometry of the slope variety by translating them into purely combinatorial problems concerning enumeration of trees.Comment: 36 pages; final published versio

Kinematic Evidence for Superbubbles in I Zw 18: Constraints on the Star Formation History and Chemical Evolution

We have combined measurements of the kinematics, morphology, and oxygen abundance of the ionized gas in \IZw18, one of the most metal-poor galaxies known, to examine the star formation history and chemical mixing processes.Comment: 31 pages including 6 figures. Accepted for publication in the Astrophysical Journa

Lignosulfonate as a Strength Additive for Non-Wood Paperboard

Recycle mills that use old corrugated cardboard (OCC) in their furnish experience difficulties in maintaining the quality of the paperboard produced. Recycle mills using the OCC collect their OCC from many parts of the world. Countries such as China and Japan use rice fibers in the production of corrugated cardboard. Other countries use straw as a fiber source. The end result is that OCC in the United States contains a portion of non-wood fibers as well as the typical wood fibers. Paperboard containing these non-wood fibers typically has lower strength properties than paperboard produced from pure wood fibers. Literature suggests that lignosulfonate compounds can be used as a strength agent for recycled wood fiber paperboards. Calcium lignosulfonate is readily available and is not costly and would prove to be an ideal strength agent for use in recycled paperboard. The objective of this project was to test calcium lignosulfonate as a strength agent in improving the runnability and strength properties on paperboard made from wheat straw paperboard and/or paperboard containing a mixture of wheat straw and wood fibers. Handsheets (120g/m2 ) were prepared on a Noble and Wood handsheet machine. The handsheets from each furnish were then immersed in a bath of calcium lignosulfonate followed by an immersion in kymene. Calcium lignosulfonate levels were varied in the bath in order to control the amount of calcium lignosulfonate applied to each handsheet. The results show that as far as recycled pulp is concerned, CaLS at 10% is definitely beneficial compared with no CaLS in all strength properties. In the case of straw paperboard, 10% CaLS definitely gives higher strength properties compared with no CaLS (except for burst and Scott bond). Higher CaLS levels (10% or 20%) may be justified only in the case of ring crush. As for mixed fiber paperboard, CaLS seems to yield better strength properties (except in the case of Scott bond and burst). While 10% CaLS still seems to be sufficient, 20% seems to result in better crushing resistance and stiffness. The conclusion of this project is that 10% CaLS yields better strength properties in most of the cases and can be the starting point for further refinement studies

Making Banners and Bridges: Working Together on Global Themes

This paper is an interpretivist study of joint work between two groups of learners, one group from a Higher Education institution and the other from a small independent organisation. This collaboration provided an opening for the groups to work together from January to March in 2007 and in the same period in 2009. Before 2007, one week in the Chevening programme had been dedicated to examining community development organisations and policies in Scotland. The CD team in the Department of Adult and Continuing Education (DACE) had initially offered an annual lecture and workshop on community development and the sessions had been well received. So it was agreed in 2007 that it would be beneficial if we could include the CD students as they had much in common with the Fellows in terms of their work and studies. So both programmes were synchronised to enable the students and Fellows to work together. In 2007 the learners included the student/practitioners of the Bachelor of Community Learning and Development (BCLD) within the University of Glasgow and the Fellows of the Chevening Scholarship programme hosted and ran by the Active Learning Centre (ALC). (The BCLD was later replaced by the Bachelor of Arts in Community Development (BACD).) The joint work had gone well in 2007 so the tutors decided they would collaborate again in 2009 so the BACD student/practitioners and a different group of Fellows shared another learning experience. The University students in both the BCLD and BACD courses attended a work-based degree programme which is for people with substantial, current practice working in the community in either a paid or unpaid capacity. The Chevening programme, which has run since 2004, included ‘mid-career professionals from a variety of both Government and non-governmental organisations from all over the world’ Active Learning Centre (2003). During their time in the UK, the Fellows take part in a series of visits, lectures, workshops, roundtable discussions and placements. The collaboration had at the heart of the work some very straightforward aims which were value driven and about the benefits of mutual and reciprocal teaching and learning, supported by meaningful discussion and dialogue. The basic impetus was for the two groups of learners to come together to explore global issues from different perspectives. The groups were also given an opportunity to learn about each other’s work in civil society and governance. The aims of this partnership were simply to • to gain mutual learning • to bring the visitors into the host communities • to take the University out to relevant communities • to create sustainable relationships

Evolution of NCoR-1 and NCoR-2 corepressor alternative mRNA splicing in placental mammals.

ObjectiveThe NCoR-1 and NCoR-2 corepressors are products of an early gene duplication near the beginning of vertebrate evolution and play both overlapping and divergent roles in development and physiology. Alternative-splicing of NCoR-1 and NCoR-2 further customizes their functions. To better understand the evolutionary basis of this phenomenon we extended our prior study of NCoR-1 and NCoR-2 alternative-splicing to an expanded series of species.ResultsAlternative-splicing of NCoR-2 was observed in all vertebrates examined whereas alternative-splicing of NCoR-1 was largely limited to placental mammals. Notably the most prominent of the NCoR-1 alternative-splicing events specific to the placental lineage, in exon 37 that plays a key role in murine metabolism, mimics in many features an analogous alternative-splicing event that appeared in NCoR-2 much earlier at the beginning of the vertebrate radiation. Detection of additional alternative-splicing events, at exons 28 in NCoR-1 or NCoR-2, was limited to the Rodentia or Primates examined, indicating both corepressor paralogs continued to acquire additional splice variations more recently and independently of one another. Our results suggest that the NCoR-1/NCoR-2 paralogs have been subject to a mix of shared and distinct selective pressures, resulting in the pattern of divergent and convergent alternative-splicing observed in extant species