The osteoporosis care gap in Canada

BACKGROUND: The presence of a fragility fracture is a major risk factor for osteoporosis, and should be an indicator for osteoporosis diagnosis and therapy. However, the extent to which patients who fracture are assessed and treated for osteoporosis is not clear. METHODS: We performed a review of the literature to identify the practice patterns in the diagnosis and treatment of osteoporosis in adults over the age of 40 who experience a fragility fracture in Canada. Searches were performed in MEDLINE (1966 to January 2, 2003) and CINAHL (1982 to February 1, 2003) databases. RESULTS: There is evidence of a care gap between the occurrence of a fragility fracture and the diagnosis and treatment of osteoporosis in Canada. The proportion of individuals with a fragility fracture who received an osteoporosis diagnostic test or physician diagnosis ranged from 1.7% to 50%. Therapies such as hormone replacement therapy, bisphosphonates or calcitonin were being prescribed to 5.2% to 37.5% of patients. Calcium and vitamin D supplement intake was variable, and ranged between 2.8% to 61.6% of patients. CONCLUSION: Many Canadians who experience fragility fracture are not receiving osteoporosis management for the prevention of future fractures

The James Webb Space Telescope Mission: Optical Telescope Element Design, Development, and Performance

The James Webb Space Telescope (JWST) is a large, infrared space telescope that has recently started its science program which will enable breakthroughs in astrophysics and planetary science. Notably, JWST will provide the very first observations of the earliest luminous objects in the Universe and start a new era of exoplanet atmospheric characterization. This transformative science is enabled by a 6.6 m telescope that is passively cooled with a 5-layer sunshield. The primary mirror is comprised of 18 controllable, low areal density hexagonal segments, that were aligned and phased relative to each other in orbit using innovative image-based wavefront sensing and control algorithms. This revolutionary telescope took more than two decades to develop with a widely distributed team across engineering disciplines. We present an overview of the telescope requirements, architecture, development, superb on-orbit performance, and lessons learned. JWST successfully demonstrates a segmented aperture space telescope and establishes a path to building even larger space telescopes.Comment: accepted by PASP for JWST Overview Special Issue; 34 pages, 25 figure

Counterfactual history, management and organizations: Reflections and new directions

This article reflects on the papers published in the Symposium on 'Counterfactual History in Management and Organizations'. After describing the background to the symposium we review some important themes in the multidisciplinary domain of counterfactuals. We discuss each of the papers published in the symposium and set out our views on future directions for counterfactual history in the management and organization studies discipline

The International Encyclopaedia of Gender, Media and Communication - Introduction

The first major reference work on gender and media—covering a broad range of gender-focused topicsThe International Encyclopedia of Gender, Media, and Communication comprises more than 250 entries by an international team of both established and emerging scholars in the field. This innovative resource explores how gender is represented in media, who produces the content, and the ways in which audiences receive and understand media messages. The contributors offer original insights on diverse aspects of gender in film, television, visual media, social and digital media and more. Three alphabetically-organized volumes explore contexts and issues, production, fiction and non-fiction representation, and audience consumption. Each entry provides an overview of the topic, a list of additional readings, and cross-references to related entries in the encyclopedia. Sub-topics are thematically organized, covering a wide range of issues, genres, and media formats. Comprehensive and up-to-date, the encyclopedia places gender at the center of both historical and contemporary debates in the broad field of media and communication