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Digital Currents
Social media has irrevocably changed how people consume the news. With the distinction between professional and citizen journalists blurring like never before, Digital Currents illuminates the behind-the-scenes efforts of television newscasters to embrace the public’s participation in news and information gathering and protect the integrity of professional journalism.
Using interviews with more than one hundred journalists from eight networks in Canada and the United Kingdom, Rena Bivens takes the reader inside TV newsrooms to explore how news organisations are responding to the paradigmatic shifts in media and communication practices. The first book to examine the many ways that the public has entered the production of mainstream news, Digital Currents underscores the central importance of media literacy in the age of widespread news sources.
eBook
Proving exact values for the$2$ -limited broadcast domination number on grid graphs
We establish exact values for the$2$ -limited broadcast domination number of various grid graphs, in particular$C_m\\square C_n$for$3 \\leq m \\leq 6$and all$n\\geq m$ ,$P_m \\square C_3$for all$m \\geq 3$ , and$P_m \\square C_n$for$4\\leq m \\leq 5$and all$n \\geq m$ . We also produce periodically optimal values for$P_m \\square C_4$and$P_m \\square C_6$for$m \\geq 3$ ,$P_4 \\square P_n$for$n \\geq 4$ , and$P_5 \\square P_n$for$n \\geq 5$ . Our method completes an exhaustive case analysis and eliminates cases by combining tools from linear programming with various mathematical proof techniques.
Journal Article
To improve existing marsh bird survey protocols, we need to evaluate closure assumptions
Our collective understanding of secretive marsh birds has increased in the past decades due to the development and implementation of the North American Standardized Marsh Bird Monitoring Protocol (hereafter, Protocol). The Protocol proposes call broadcast surveys to increase vocalization and detection rates within 3 standardized survey periods aimed at surveying peak breeding activity for a suite of secretive marsh birds. We noted a trend in the literature linking occupancy modeling with the survey design from the Protocol, despite some evidence that vocalizations decline across survey periods, which could indicate lack of population closure. An underlying assumption of occupancy modeling is closure, and the Protocol was designed to focus on only birds which will remain in an area throughout the breeding season and not migrants that may only be present in the first survey period. Including migrating marsh birds, especially if a large percentage of marsh bird detections are migrants, can bias occupancy estimates and lead to erroneous density and population size estimates that may affect conclusions about habitat resource and bird associations. We urge researchers and managers to carefully consider the analytical and field techniques when designing studies for marsh birds and to not simply pair the biweekly survey design within the Protocol with occupancy modeling and ignore closure assumptions, turnover rates, andpotential differences in resource use by migrating and breeding marsh birds. Specifically, we suggest that researchers consider short survey interval times (e.g., ~2 days rather than 2 weeks) or continuous call monitoring using automated recorded devices deployed for 1–2 weeks per survey location when using occupancy analysis on secretive marsh birds. We also call for future study of turnover rates, stopover duration, and vocalization rates during migration and breeding periods to better inform study designs and increase the appropriateness of statistical analysis.
Journal Article
Bounds On$(t,r)$Broadcast Domination of$n$ -Dimensional Grids
In this paper, we study a variant of graph domination known as$(t, r)$broadcast domination, first defined in Blessing, Insko, Johnson, and Mauretour in 2015. In this variant, each broadcast provides$t-d$reception to each vertex a distance$d < t$from the broadcast. If$d \\ge t$then no reception is provided. A vertex is considered dominated if it receives$r$total reception from all broadcasts. Our main results provide some upper and lower bounds on the density of a$(t, r)$dominating pattern of an infinite grid, as well as methods of computing them. Also, when$r \\ge 2$we describe a family of counterexamples to a generalization of Vizing's Conjecture to$(t,r)$broadcast domination.
Journal Article
Developing dialogues
Developing Dialogues offers a new perspective on Australian community broadcasting and presents evidence of global trends in the media industry. Based on firsthand research of radio and television audiences in Australia, the authors argue that community radio and television worldwide perform an essential service for indigenous and ethnic audiences.
eBook