459 research outputs found
Online leadership discourse in higher education: a digital multimodal discourse perspective
As leadership discourses in higher education are increasingly being mediated online, texts previously reserved for staff are now being made available in the public domain. As such, these texts become accessible for study, critique and evaluation. Additionally, discourses previously confined to the written domain are now increasingly multimodal. Thus, an approach is required that is capable of relating detailed, complex multimodal discourse analyses to broader sociocultural perspectives to account for the complex meaning-making practices that operate in online leadership discourses. For this purpose, a digital multimodal discourse approach is proposed and illustrated via a small-scale case study of the online leadership discourse of an Australian university. The analysis of two short video texts demonstrates how a digital multimodal discourse perspective facilitates the identification of key multimodal systems used for meaning-making in online communication, how meaning arises through combinations of semiotic choices (not individual choices), and how the results of multimodal discourse analysis using digital technology can reveal larger sociocultural patterns â in this case, divergent leadership styles and approaches as reflected in online discourse, at a time of immense change within the higher education sector
Spitzer-IRS Spectroscopy of the Prototypical Starburst Galaxy NGC7714
We present observations of the starburst galaxy NGC 7714 with the Infrared
Spectrograph IRS on board the Spitzer Space Telescope. The spectra yield a
wealth of ionic and molecular features that allow a detailed characterization
of its properties. NGC 7714 has an HII region-like spectrum with strong PAH
emission features. We find no evidence for an obscured active galactic nucleus,
and with [NeIII]/[NeII]~0.73, NGC7714 lies near the upper end of
normal-metallicity starburst galaxies. With very little slicate absorption and
a temperature of the hottest dust component of 340K, NGC 7714 is the perfect
template for a young, unobscured starburstComment: To appear in the special ApJSS issue on early results from Spitze
Tense and aspect in word problems about motion: diagram, gesture, and the felt experience of time
© 2014, Mathematics Education Research Group of Australasia, Inc. Word problems about motion contain various conjugated verb forms. As students and teachers grapple with such word problems, they jointly operationalize diagrams, gestures, and language. Drawing on findings from a 3-year research project examining the social semiotics of classroom interaction, we show how teachers and students use gesture and diagram to make sense of complex verb forms in such word problems. We focus on the grammatical category of âaspectâ for how it broadens the concept of verb tense. Aspect conveys duration and completion or frequency of an event. The aspect of a verb defines its temporal flow (or lack thereof) and the location of a vantage point for making sense of this durational process
The Link Between Star Formation and Accretion in LINERs: A Comparison with other AGN Subclasses
We present archival high resolution X-ray imaging observations of 25 nearby
LINERs observed by ACIS on board Chandra. This sample builds on our previously
published proprietary and archival X-ray observations, and includes the
complete set of LINERs with published black hole masses and FIR luminosities
that have been observed by Chandra. Of the 82 LINERs observed by Chandra, 41
(50%) display hard nuclear cores consistent with an AGN. The nuclear 2-10 keV
luminosities of these AGN-LINERs range from ~ 2 X 10^38 ergs s^-1 to ~ 1 X
10^44 ergs s^-1. Reinforcing our previous work, we find a significant
correlation between the Eddington ratio, L bol/LEdd, and the far-IR (FIR)
luminosity, LFIR, as well as the IR brightness ratio, LFIR/LB in the host
galaxy of AGN-LINERs that extends over seven orders of magnitude in Lbol/LEdd.
Combining our AGN-LINER sample with galaxies from other AGN subclasses, we find
that this correlation is reinforced in the full sample of 129 AGN, extending
over almost nine orders of magnitude in Lbol/LEdd. Using archival and
previously published observations of the 6.2 mm PAH feature from the Infrared
Space Observatory (ISO), we find that it is unlikely that dust heating by the
AGN dominates the FIR luminosity in our sample of AGN. Our results may
therefore imply a fundamental link between the mass accretion rate (Mdot), as
measured by the Eddington ratio, and the star formation rate (SFR), as measured
by the FIR luminosity.Comment: 22 pages, 11 figures. Paper excepted for publication by ApJ in
Novembe
Multiwavelength Study of the Starburst Galaxy NGC 7714. II: The Balance between Young, Intermediate Age and Old Stars
We combine existing multiwavelength data (incl. an HST/GHRS UV spectrum, an
optical spectrum, far-IR, Xray and radio fluxes) with new HST/WFPC2 images,
near-IR photometry and K band spectroscopy. We use these data to constrain the
young, the intermediate age and the old stellar populations in the central 330
pc of the starburst galaxy NGC 7714. [...]
We find that the young burst responsible for the UV light is only a small
part of an extended episode of enhanced star formation (SF) [...]. The mass of
young and intermediate age stars thus formed equals at least 10% of the mass
locked in pre-existing stars of the underlying galaxy nucleus [...]. The
spectrophotometric SF timescale is long compared to the ~110 Myr elapsed since
closest contact with NGC 7715. The trigger of the starburst remains elusive.
NGC 7714 owes its brightness in the UV to a few low extinction lines of sight
towards young stars. [...] The different extinction estimates obtained from
different indicators result naturally from the coexistence of populations with
various ages and obscurations. The near-IR continuum image looks smoothest, as
a consequence of lower sensitivity to extinction and of a larger contribution
of old stars. We compare the nuclear properties of NGC 7714 with results from
studies in larger apertures. We emphasize that the global properties of
starburst galaxies are the result of the averaging over many lines of sight
with diverse properties in terms of obscuration and stellar ages.Comment: 29 pages (+20 figures and tables), Latex2e (figs. included), uses
aastex.cls. To be published in ApJ (May 2001 issue
ISO observations of Hickson Compact Group 31 with the central Wolf-Rayet galaxy NGC 1741
Hickson Compact Group (HCG) 31, consisting of the Wolf-Rayet galaxy NGC 1741
and its irregular dwarf companions, was observed using the Infrared Space
Observatory. The deconvolved ISOCAM maps of the galaxies using the 7.7 micron
and 14.3 micron (LW6 and LW3) filters are presented, along with ISOPHOT
spectrometry of the central starburst region of NGC 1741 and the nucleus of
galaxy HCG 31A. Strong mid-IR emission was detected from the central burst in
NGC 1741, along with strong PAH features and a blend of features including [S
IV] at 10.5 micron. The 14.3/6.75 micron flux ratio, where the 6.75 micron flux
was synthesized from the PHT-S spectrum, and 14.3/7.7 micron flux ratios
suggest that the central burst within NGC 1741 may be moving towards the
post-starburst phase. Diagnostic tools including the ratio of the integrated
PAH luminosity to the 40 to 120 micron infrared luminosity and the far-infrared
colours reveal that despite the high surface brightness of the nucleus, the
properties of NGC 1741 can be explained in terms of a starburst and do not
require the presence of an AGN. The Tycho catalogue star TYC 04758-466-1, with
m = 11.3 and spectral type F6, was detected at 7.7 and 14.3 microns.Comment: 27 pages, 7 figures. Accepted for publication in the Astrophysical
Journa
Compassion Stress and the Qualitative Researcher
Human subjects are carefully protected in the research process. However, the same consideration is not currently being given to the qualitative researcher, even those investigating topics that are likely to elicit powerful emotions. The role of researcherâs emotional responses and the self-care strategies that, in some circumstances, are appropriate for the researcher and other research support personnel have not received the attention they deserve in qualitative research literature. Based on experience in conducting research on the topic of self-directed learning and breast cancer, and on the limited literature available, the author makes the case for the use of strategies such as counseling, peer debriefing, and journal writing as means of dealing with the potential for âcompassion stressâ as experienced by the researcher and other research support personnel. She also suggests that the preparation of social science researchers should include information on appropriate self-care strategies.Yeshttps://us.sagepub.com/en-us/nam/manuscript-submission-guideline
Doing descriptive phenomenological data collection in sport psychology research
Researchers in the field of sport psychology have begun to highlight the potential of phenomenological ap-proaches in recognising subjective experience and the essential structure of experience. Despite this, phenom-enology has been used inconsistently in the sport psychology literature thus far. Therefore, the aim of this paper is to provide theoretically informed practical guidelines for researchers who wish to employ the descrip-tive phenomenological interview in their studies. The recommended guidelines will be supported by under-pinning theory and brief personal accounts. An argument will also be presented for the potential that descrip-tive phenomenology holds in creating new knowledge through rich description. In doing so, it is hoped that this method will be utilised appropriately in future sport psychology research to not only strengthen and diver-sify the existing literature, but also the knowledge of practitioners working within the applied world of profes-sional sport
Meaning between, in, and around words, gestures and postures: multimodal meaning making in children's classroom communication
The view of language from a social semiotic perspective is clear. Language is one of many semiotic resources we employ in our communicative practices. That is to say that while language is at times dominant, it always operates within a multimodal frame and furthermore, at times modes other than language are dominant. The proposed 2014 National Curriculum for the UK, on the other hand, values pupils' face-to-face classroom interaction in terms of standard spoken English (i.e. in terms of the mode of language alone). This paper offers examples demonstrating how embodied modes such as gesture, posture, facial expression, gaze and haptics work in conjunction with speech in children's collaborative construction of knowledge. In other words, what may have been previously conceived as gaps and silences - often interpreted as an absence of language - are in fact instantiations of the work of semiotic modes other than language. In order to consider this closely, this paper offers evidence from a multimodal micro-analysis of pupil-to-pupil, face-to-face interaction in one science lesson in a Year Five UK Primary classroom. It demonstrates how children's meaning-making is achieved through apt use of all available semiotic resources
- âŠ