5 research outputs found
The Surface Mass Density and Structure of the Outer Disk of NGC 628
We study the kinematics of GALEX-selected H_alpha knots in the outer disk
(beyond R25) of NGC 628 (M74), a galaxy representative of large, undisturbed,
extended UV (Type 1 XUV) disks. Our spectroscopic target sample of 235 of the
bluest UV knots surrounding NGC 628 yielded 15 H_alpha detections (6%), roughly
the number expected given the different mean ages of the two populations. The
measured vertical velocity dispersion of the H_alpha knots between 1 - 1.8 R25
(13.5 - 23.2 kpc) is < 11 km/s. We assume that the H_alpha knots trace an
'intermediate' vertical mass density distribution (between the isothermal
sech(z)^2 and exponential distributions) with a constant scaleheight across the
outer disk (h_z = 700 pc) and estimate a total surface mass density of 7.5
solar masses/pc^2. This surface mass density can be accounted for by the
observed gas and stars in the outer disk (little or no dark matter in the disk
is required). The vertical velocity dispersion of the outer disk H_alpha knots
nearly matches that measured from older planetary nebulae near the outskirts of
the optical disk by Herrmann et al., suggesting a low level of scattering in
the outer disk. A dynamically cold stellar component extending nearly twice as
far as the traditional optical disk poses interesting constraints on the
accretion history of the galaxy.Comment: Accepted for publication in The Astrophysical Journal
Designing and Implementing a Competency-Based Training Program for Anesthesiology Residents at the University of Ottawa
Competency-based medical education is gaining traction as a solution to address the challenges associated with the current time-based models of physician training. Competency-based medical education is an outcomes-based approach that involves identifying the abilities required of physicians and then designing the curriculum to support the achievement and assessment of these competencies. This paradigm defies the assumption that competence is achieved based on time spent on rotations and instead requires residents to demonstrate competence. The Royal College of Physicians and Surgeons of Canada (RCPSC) has launched Competence by Design (CBD), a competency-based approach for residency training and specialty practice. The first residents to be trained within this model will be those in medical oncology and otolaryngology-head and neck surgery in July, 2016. However, with approval from the RCPSC, the Department of Anesthesiology, University of Ottawa, launched an innovative competency-based residency training program July 1, 2015. The purpose of this paper is to provide an overview of the program and offer a blueprint for other programs planning similar curricular reform. The program is structured according to the RCPSC CBD stages and addresses all CanMEDS roles. While our program retains some aspects of the traditional design, we have made many transformational changes