A magnetic cycle of tau Bootis? The coronal and chromospheric view

Tau Bootis is a late F-type main sequence star orbited by a Hot Jupiter. During the last years spectropolarimetric observations led to the hypothesis that this star may host a global magnetic field that switches its polarity once per year, indicating a very short activity cycle of only one year duration. In our ongoing observational campaign, we have collected several X-ray observations with XMM-Newton and optical spectra with TRES/FLWO in Arizona to characterize tau Boo's corona and chromosphere over the course of the supposed one-year cycle. Contrary to the spectropolarimetric reconstructions, our observations do not show indications for a short activity cycle.Comment: 4 pages, 2 figures, appeared in Astronomical Notes 333, 1, 26-29 (2012

From Me to We: A Phenomenological Inquiry Into Group Beingness

To be human is to be a member of myriad groups. The universality of groups in our lives poses an important area of study for social scientists investigating human flourishing. Additionally, inquiring into the evolutionary potential of groups may begin to inform new ways of addressing the intractable issues we face as a human species. While most empirical studies of groups focus on group performance, or group doingness, this study explored group beingness and the experience of manifesting deep union and oneness, which is an intersubjective phenomenon that has been called coherence. Intersubjective coherence is often written about from a theoretical and conceptual perspective, as well as from a practice perspective, but it has rarely been investigated empirically. This interpretive phenomenological investigation of coherence inquired into the phenomenon through the facilitation of two group coherence treatments immediately followed by group interviews. The study’s design enabled the exploration of coherence from the intersubjective perspective, allowing for participants to make meaning of their coherence experiences in community. Findings revealed what it was like for participants to experience coherence, how the groups shifted into coherence, and the antecedents and outcomes associated with coherence. Additionally, five meta-themes, Direct Experience of Interbeing, Constructive Disorientation, Co-sensing, Metalogue, and Best Me, Best We, were identified revealing a broader context as well as the ways in which the participants made meaning of the experiences. A key outcome of the study was an empirically-based definition of coherence: coherence is a group-level phenomenon wherein members experience a collective shift into a heightened state of connectedness marked by a quieting, slowing, and calming of the group climate, an activation of an enlivened intersubjective field, and a calling forth for members\u27 best selves resulting in an acceptance and celebration of differences among members. The shift is aided by skillful means, and members are able to process and make sense of the experience through somatic, emotional, spiritual, and creative ways of knowing. Coherence experiences are often accompanied by individual and collective awakenings. This dissertation is available in open access at AURA (https://aura.antioch.edu) and OhioLINK ETD Center (https://etd.ohiolink.edu)

Single exponential decay waveform; a synergistic combination of electroporation and electrolysis (E2) for tissue ablation.

BackgroundElectrolytic ablation and electroporation based ablation are minimally invasive, non-thermal surgical technologies that employ electrical currents and electric fields to ablate undesirable cells in a volume of tissue. In this study, we explore the attributes of a new tissue ablation technology that simultaneously delivers a synergistic combination of electroporation and electrolysis (E2).MethodA new device that delivers a controlled dose of electroporation field and electrolysis currents in the form of a single exponential decay waveform (EDW) was applied to the pig liver, and the effect of various parameters on the extent of tissue ablation was examined with histology.ResultsHistological analysis shows that E2 delivered as EDW can produce tissue ablation in volumes of clinical significance, using electrical and temporal parameters which, if used in electroporation or electrolysis separately, cannot ablate the tissue.DiscussionThe E2 combination has advantages over the three basic technologies of non-thermal ablation: electrolytic ablation, electrochemical ablation (reversible electroporation with injection of drugs) and irreversible electroporation. E2 ablates clinically relevant volumes of tissue in a shorter period of time than electrolysis and electroporation, without the need to inject drugs as in reversible electroporation or use paralyzing anesthesia as in irreversible electroporation

Surface electromyographic control of a novel phonemic interface for speech synthesis

Many individuals with minimal movement capabilities use AAC to communicate. These individuals require both an interface with which to construct a message (e.g., a grid of letters) and an input modality with which to select targets. This study evaluated the interaction of two such systems: (a) an input modality using surface electromyography (sEMG) of spared facial musculature, and (b) an onscreen interface from which users select phonemic targets. These systems were evaluated in two experiments: (a) participants without motor impairments used the systems during a series of eight training sessions, and (b) one individual who uses AAC used the systems for two sessions. Both the phonemic interface and the electromyographic cursor show promise for future AAC applications.F31 DC014872 - NIDCD NIH HHS; R01 DC002852 - NIDCD NIH HHS; R01 DC007683 - NIDCD NIH HHS; T90 DA032484 - NIDA NIH HHShttps://www.ncbi.nlm.nih.gov/pubmed/?term=Surface+electromyographic+control+of+a+novel+phonemic+interface+for+speech+synthesishttps://www.ncbi.nlm.nih.gov/pubmed/?term=Surface+electromyographic+control+of+a+novel+phonemic+interface+for+speech+synthesisPublished versio

Observations of cattle use of prairie dog towns

Abstract in English and Spanish.Includes bibliographical references (pages 416-417).We investigated the use of prairie dog towns by cattle (Bos taurus) on the shortgrass steppe of northeastern Colorado by conducting surveys of cattle and vegetation from June to August 1999. Cattle presence and behavior were recorded 3 times a week during driving surveys of 15 black-tailed prairie dog (Cynomys ludovicianus) towns. A subset of 3 pastures with prairie dog towns was intensively surveyed twice weekly wherein the habitat and activity of a randomly chosen focal animal was recorded every 6 minutes for 3.5 hours. Bite and step counts of other individuals were recorded for 5-minute intervals. Vegetation height and cover data were collected monthly on each of 6 habitats. Results from driving surveys and intensively surveyed pastures were similar; cattle neither significantly preferred nor avoided prairie dog towns. Bare ground cover on prairie dog towns did not significantly differ from most other habitats, but vegetation on prairie dog towns was significantly shorter on (mean = 6.7 cm) than that off (mean = 11.9 cm) prairie dog towns. Nevertheless, foraging observations indicated that there was no significant difference between cattle foraging rates on swales (70.9 bites/min) and prairie dog towns (69.5 bites/min). Thus, cattle on the shortgrass steppe appear to use prairie dog towns in proportion to their availability and, while there, they graze as intensively as they do on habitats not inhabited by prairie dogs

Indigenous student literacy outcomes in Australia: a systematic review of literacy programmes

Improving Indigenous students’ literacy is a major priority area for the Australian Government, receiving significant funding to address below benchmark English literacy standardised test results. Despite this, recent benchmark tests suggest Indigenous students continue to achieve well below the national average. This systematic review discusses peer-reviewed and evidence-based publications that report on significant literacy programmes to investigate which aspects of literacy are their focus, which are identified as successful, conditions needed for success, barriers to success and measures of success. While most programs reported significant literacy improvements, all identified barriers to success and/or sustainability as outlined in this paper. This review also utilises the four resources literacy model and multiliteracies theories to map literacy gaps. When considering decades of literacy research, there were significant gaps in the represented literacy skills, with the dominant focus on codebreaking, and very few programs addressing critical literacies, multiliteracies or creativity skills. The review of the papers highlighted the need for consideration of ways to design balanced and place-based literacy programs; school-community literacy partnerships; access to training and resources for schools and communities around literacy and school/community research projects and agency for teacher and school leaders to be professional context-based decision-makers