Lithium enrichment on the single active K1-giant DI Piscium -- Possible joint origin of differential rotation and Li enrichment

We investigate the surface spot activity of the rapidly rotating, lithium-rich active single K-giant DI Psc to measure the surface differential rotation and understand the mechanisms behind the Li-enrichment. Doppler imaging was applied to recover the surface temperature distribution of DI Psc in two subsequent rotational cycles using the individual mapping lines Ca I 6439, Fe I 6430, Fe I 6421 and Li I 6708. Surface differential rotation was derived by cross-correlation of the subsequent maps. Difference maps are produced to study the uniformity of Li-enrichment on the surface. These maps are compared with the rotational modulation of the Li I 6708 line equivalent width. Doppler images obtained for the Ca and Fe mapping lines agree well and reveal strong polar spottedness, as well as cool features at lower latitudes. Cross-correlating the consecutive maps yields antisolar differential rotation with shear coefficient -0.083 +- 0.021. The difference of the average and the Li maps indicates that the lithium abundance is non-activity related. There is also a significant rotational modulation of the Li equivalent width.Comment: 8 pages, 7 figures, accepted in A&

Closer to the body: reflections on skript and extracts from collected writings

In this two part article we reflect upon the experience of writing-dancing with audiences and artists in the context of our installation work skript (commissioned by Dance4, Nottingham, 2013). Part one considers how skript engages embodied, felt sense, improvisational and collaborative modalities in relation to the act of writing. As such we consider the ways in which the particular interface of language and embodiment, which is the focus of skript, might allow a knowing of ‘something’ otherwise – be that something a sense of our own bodies, a dance work, a performance experience or perhaps just that moment in time. In part two we share extracts of some of the writings that were collaboratively generated as part of skript. We focus on the work of three performance/movement artists: Guy Dartnell, Miguel Pereira and Rosalind Crisp. These dance-writings are published as they were written in real time, in the moment of engagement. They are edited only for length and at times to correct typographical errors (but only if the errors seemed to disturb the flow of the ideas) rather than to simply ‘tidy’ the text or the grammar. The writings are relational, improvisational and at times fragmentary. For more writings see: www.writing-dancing.blogspot.com

a sword threatening the heart the scimitar syndrome

Abstract In this review, we discuss the natural and surgical history of patients with scimitar syndrome. We describe the clinical presentation, the different forms and symptoms that can be identified and the possible surgical approaches used. A discussion is also provided on the outcomes of patients undergoing surgery compared to those undergoing medical treatment. The choice of appropriate treatment is still challenging today, but new data and large multicenter studies have shown interesting new results

Creative Articulations Process (CAP)

This article outlines the ‘Creative Articulations Process’ (CAP), offering ways of coming into knowing in/through/about one’s own dance practice. This process, developed by the authors in the context of The Choreographic Lab, seeks to enrich creative activities through an elaboration tacit knowledge and practice as research. The article establishes the foundations of the process, briefly introducing the work of Hincks, Gendlin and Damasio, alongside others. It then goes on to take the reader through the six facets that form CAP – ‘Opening’, ‘Situating’, ‘Delving’, ‘Raising’, ‘Anatomizing’ and ‘Outwarding’. The article is written to encourage an active engagement, providing strategies and prompts for the artist/researcher

Magnitude-range brightness variations of overactive K giants

We study three representative, overactive spotted K giants (IL Hya, XX Tri, and DM UMa) known to exhibit V-band light variations between 0.65-1.05 mags. Our aim is to find the origin of their large brightness variation. We employ long-term phase-resolved multicolor photometry, mostly from automatic telescopes, covering 42 yr for IL Hya, 28 yr for XX Tri, and 34 yr for DM UMa. For one target, IL Hya, we present a new Doppler image from NSO data taken in late 1996. Effective temperatures for our targets are determined from all well-sampled observing epochs and are based on a V-I_C color-index calibration. The effective temperature change between the extrema of the rotational modulation for IL Hya and XX Tri is in the range 50-200 K. The bolometric flux during maximum of the rotational modulation, i.e., the least spotted states, varied by up to 39% in IL Hya and up to 54% in XX Tri over the course of our observations. We emphasize that for IL Hya this is just about half of the total luminosity variation that can be explained by the photospheric temperature (spots/faculae) changes, while for XX Tri it is even about one third. The long-term, 0.6 mag V-band variation of DM UMa is more difficult to explain because little or no B-V color index change is observed on the same timescale. Placing the three stars with their light and color variations into H-R diagrams, we find that their overall luminosities are generally too low compared to predictions from current evolutionary tracks. A change in the stellar radius due to strong and variable magnetic fields during activity cycles likely plays a role in explaining the anomalous brightness and luminosity of our three targets. At least for IL Hya, a radius change of about 9% is suggested from m_bol and T_eff, and is supported by independent vsin(i) measurements.Comment: 13 pages, 8 figures, accepted in A&