Characteristics of Tenure-Line Faculty in Leadership Preparation Programs: An Analysis of Academic Preparation and Administrative Experience

This study investigated the credentials of 755 tenure-line educational leadership faculty members, using data collected through an online questionnaire. Findings disclosed that research institutions were significantly more likely than doctoral or comprehensive institutions to hire faculty with a PhD from a research university and who identified research as their primary professional strength. A greater proportion of faculty in comprehensive universities had served as school administrators before entering academe than was the case for those at research universities. These findings have significant implications for the field, given that an increasing number of school leaders nationally are prepared at comprehensive institutions

Lateral violence within the Aboriginal community in Adelaide: “It affects our identity and wellbeing”

The term “lateral violence” describes how members of an oppressed group direct their dissatisfaction inward. This paper reports on qualitative interviews with 30 local Aboriginal participants in Adelaide, South Australia. The purpose was to explore understandings, awareness, experiences, and effects of lateral violence. Most participants completed two questionnaires (the Kessler-5 and negative life events scales) in order to gain further insight into their wellbeing and its association with experiences of lateral violence. Overall, four major interpretative themes emerged from interviews: the predominantly covert and insidious nature of lateral violence; the relationship between racism and lateral violence; challenges to identity as acts of lateral violence; and the destructive effects of lateral violence on wellbeing. The wellbeing scales indicated overall that participants’ psychological distress was in the moderate range, with 29% scoring in the high/very high psychological distress range. Many of the participants with high distress levels relayed traumatic narratives of lateral violence and were exposed to a number of negative life events. It is hoped that by increasing awareness of lateral violence and its effects, this will assist in preventing lateral violence incidences within Indigenous communities

Dosimetric feasibility of utilizing the ViewRay magnetic resonance guided linac system for image-guided spine stereotactic body radiation therapy

INTRODUCTION: Spine stereotactic body radiation therapy (SBRT) achieves favorable outcomes compared to conventional radiotherapy doses/fractionation. The spinal cord is the principal dose-limiting organ-at-risk (OAR), and safe treatment requires precise immobilization/localization. Therefore, image guidance is paramount to successful spine SBRT. Conventional X-ray imaging and alignment to surrogate bony anatomy may be inadequate, whereas magnetic resonance imaging (MRI) directly visualizes the dose-limiting cord. This work assessed the dosimetric capability of the ViewRay (ViewRay Inc. Oakwood Village, OH) magnetic resonance (MR) guided linac (MR-Linac) for spine SBRT. METHODS: Eight spine SBRT patients without orthopedic hardware who were previously treated on a TrueBeam using volumetric modulated arc therapy (VMAT) were re-planned using MR-Linac fixed-field intensity-modulated radiation therapy (IMRT). Phantom measurements using film, ionization chamber, and a commercial diode-array assessed feasibility. Plans included a variety of prescriptions (30-50 Gy in 3-10 fractions). RESULTS: MR-Linac plans satisfied all clinical goals. Compared to VMAT plans, both entrance dose and heterogeneity increased (D CONCLUSION: Spine SBRT with the MR-Linac is feasible as verified via re-planning eight clinical cases followed by delivery verification in phantoms using film, diodes, and an ionization chamber. Real-time visualization of the dose-limiting cord during spine SBRT may enable cord-based gating, reduced margins, alternate dose schemas, and/or adaptive therapy

CFHTLenS: A Weak Lensing Shear Analysis of the 3D-Matched-Filter Galaxy Clusters

We present the cluster mass-richness scaling relation calibrated by a weak lensing analysis of >18000 galaxy cluster candidates in the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS). Detected using the 3D-Matched-Filter cluster-finder of Milkeraitis et al., these cluster candidates span a wide range of masses, from the small group scale up to $\sim10^{15} M_{\odot}$, and redshifts 0.2 $\lesssim z\lesssim$ 0.9. The total significance of the stacked shear measurement amounts to 54$\sigma$. We compare cluster masses determined using weak lensing shear and magnification, finding the measurements in individual richness bins to yield 1$\sigma$ compatibility, but with magnification estimates biased low. This first direct mass comparison yields important insights for improving the systematics handling of future lensing magnification work. In addition, we confirm analyses that suggest cluster miscentring has an important effect on the observed 3D-MF halo profiles, and we quantify this by fitting for projected cluster centroid offsets, which are typically $\sim$ 0.4 arcmin. We bin the cluster candidates as a function of redshift, finding similar cluster masses and richness across the full range up to $z \sim$ 0.9. We measure the 3D-MF mass-richness scaling relation $M_{200} = M_0 (N_{200} / 20)^\beta$. We find a normalization $M_0 \sim (2.7^{+0.5}_{-0.4}) \times 10^{13} M_{\odot}$, and a logarithmic slope of $\beta \sim 1.4 \pm 0.1$, both of which are in 1$\sigma$ agreement with results from the magnification analysis. We find no evidence for a redshift-dependence of the normalization. The CFHTLenS 3D-MF cluster catalogue is now available at cfhtlens.org.Comment: 3D-MF cluster catalog is NOW AVAILABLE at cfhtlens.org. Magnification-shear mass comparison in Figure 10. 19 pages, 10 figures. Accepted to MNRA