Incivility Among Radiography Educators in the United States

Purpose: Medical imaging education must nurture a civil environment for both students and educators. Because faculty incivility can potentially compromise learning and interfere with workplace productivity, this study examined the perceptions of incivility among radiography educators in the United States. Methods: A survey research method was designed to examine the severity and frequency of incivility among educators teaching in radiography programs accredited by the Joint Review Committee on Education in Radiologic Technology (JCERT). Using a scale of 1 to 4, the participants in this study considered their perceptions of faculty incivility among radiography educators within their respective departments. Results: Civility has been demonstrated as a perceived problem in this survey. A total of 240/1,333 educators completed the survey, resulting in a response rate of 18%. Only 40.4% (97/240) of the participants in this study perceived that the severity of incivility was not a problem. The majority of the participant perceived civility to be an issue with 23.8% (57/240) reporting a minor problem; 39/240 (16.3%) said it was a moderate problem; and 47/240 (19.6%) believed faculty incivility is a major problem among radiography educators in the United States. Interestingly, severe uncivil faculty behaviors did not occur as often as behaviors classified as less severe. A very weak negative correlation was found between perceived severity of faculty incivility and age of radiography educators, indicating age increased as the perceived severity of faculty incivility slightly decreased and vice versa. Conclusions: Faculty incivility is perceived to be occurring among radiography educators in the United States. This study provides a foundation for future research to address various aspects of incivility among imaging sciences and radiation therapy educators in the United States

The Compositional Structure of the Asteroid Belt

The past decade has brought major improvements in large-scale asteroid discovery and characterization with over half a million known asteroids and over 100,000 with some measurement of physical characterization. This explosion of data has allowed us to create a new global picture of the Main Asteroid Belt. Put in context with meteorite measurements and dynamical models, a new and more complete picture of Solar System evolution has emerged. The question has changed from "What was the original compositional gradient of the Asteroid Belt?" to "What was the original compositional gradient of small bodies across the entire Solar System?" No longer is the leading theory that two belts of planetesimals are primordial, but instead those belts were formed and sculpted through evolutionary processes after Solar System formation. This article reviews the advancements on the fronts of asteroid compositional characterization, meteorite measurements, and dynamical theories in the context of the heliocentric distribution of asteroid compositions seen in the Main Belt today. This chapter also reviews the major outstanding questions relating to asteroid compositions and distributions and summarizes the progress and current state of understanding of these questions to form the big picture of the formation and evolution of asteroids in the Main Belt. Finally, we briefly review the relevance of asteroids and their compositions in their greater context within our Solar System and beyond.Comment: Accepted chapter in Asteroids IV in the Space Science Series to be published Fall 201

A Review of the Use of Massive Open Online Courses (MOOCs) in Medical Imaging Education

Purpose: The purpose of this review article is to describe the benefits and challenges associated with massive open online courses (MOOCs) and to discuss the implications specific to medical imaging education and training. Methods: Peer-reviewed journal articles pertaining to MOOCs in higher education were analyzed to identify commonalities, relationships, and possible gaps in the literature. Results: Analysis revealed several repetitive themes and concepts regarding the use of MOOCs in higher education: theory of connectivism, instructors’ and students’ perspectives, and benefits and challenges. Implications for medical imaging education and training were also discussed. Conclusions: As web-based education and technology integration continue to increase, innovative approaches, such as MOOCs, will continue to develop. As higher education institutions continue experimenting with MOOCs, opportunities to engage individuals as lifelong learners will rise. Medical imaging students can use MOOCs to refine skills to prepare for an upcoming course along with the possibility of completing continuing education requirements

Factors Associated With Physical Activity Among Survivors Of Adolescent And Young Adult Cancer: The National Health Interview Survey

https://openworks.mdanderson.org/sumexp21/1006/thumbnail.jp

Temperature dependence of the magnetic anisotropy and magnetostriction of Fe100−xGax (x = 8.6, 16.6, 28.5)

The temperature dependence of the lowest order magnetic anisotropy constant K1 and the lowest order saturation magnetostriction constant, (3/2)λ100, were measured from 4 K to 300 K for Fe91.4Ga8.6,Fe83.4Ga16.6, and Fe71.5Ga28.5 and were compared to the normalized magnetization power law, ml(l+1)/2. Fe91.4Ga8.6 maintains the magnetostriction anomaly of Fe (dλ100/dT\u3e0) and K1 is a reasonable fit to the ml(l+1)/2power law with K1(0 K) ≅ 90 kJ/m3. Fe83.4Ga16.6 does not show a magnetostriction anomaly, but fits the power law remarkably well. Fe71.5Ga28.5 possesses a small K1( ∼ 1 kJ/m3) at all temperatures and a large temperature dependent magnetostriction, reaching ∼ 800 ppm at low temperature

A VLA Search for Water Masers in Six HII Regions: Tracers of Triggered Low-Mass Star Formation

We present a search for water maser emission at 22 GHz associated with young low-mass protostars in six HII regions -- M16, M20, NGC 2264, NGC 6357, S125, and S140. The survey was conducted with the NRAO Very Large Array from 2000 to 2002. For several of these HII regions, ours are the first high-resolution observations of water masers. We detected 16 water masers: eight in M16, four in M20, three in S140, and one in NGC 2264. All but one of these were previously undetected. No maser emission was detected from NGC 6357 or S125. There are two principle results to our study. (1) The distribution of water masers in M16 and M20 does not appear to be random but instead is concentrated in a layer of compressed gas within a few tenths of a parsec of the ionization front. (2) Significantly fewer masers are seen in the observed fields than expected based on other indications of ongoing star formation, indicating that the maser-exciting lifetime of protostars is much shorter in HII regions than in regions of isolated star formation. Both of these results confirm predictions of a scenario in which star formation is first triggered by shocks driven in advance of ionization fronts, and then truncated approximately 10^5 years later when the region is overrun by the ionization front.Comment: 30 pages, 20 figures, 3 tables. Accepted for publication by ApJ. Full resolution figures and PS and PDF versions with full-res figures available at http://eagle.la.asu.edu/healy/preprints/hhc0