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USDA Instructional Risk Messages for High Pathogen Avian Influenza
Title
USDA Instructional Risk Messages for High Pathogen Avian Influenza.
Creator
Jones, Jenna, Sellnow, Timothy, Littlefield, Robert, Sellnow, Deanna, Parrish, Adam, University of Central Florida
Abstract / Description
High Pathogen Avian Influenza (HPAI) is a highly contagious disease threatening United States poultry farms. The aim of this study is to examine the extent to which current instructional risk communication by the United States Department of Agriculture (USDA) meets the expectations of existing literature, particularly the IDEA model. This study examined two documents produced by the USDA for the ongoing threat of HPAI, the Red Book and the Defend the Flock campaign. The aim of the documents...
Show moreHigh Pathogen Avian Influenza (HPAI) is a highly contagious disease threatening United States poultry farms. The aim of this study is to examine the extent to which current instructional risk communication by the United States Department of Agriculture (USDA) meets the expectations of existing literature, particularly the IDEA model. This study examined two documents produced by the USDA for the ongoing threat of HPAI, the Red Book and the Defend the Flock campaign. The aim of the documents is to provide U.S. poultry farmers and the publics with knowledge and information about prevention and response to HPAI. The IDEA model was applied to serve as a framework to analyze how much of each component was present in the messaging. Specifically, the internalization, explanation, and action components were applied to the USDA documents.The documents were coded by two researchers. The researchers, using a codebook, examined the documents and assessed each section (Red Book) or slogan (Defend the Flock) for the presence or absence of three components of the IDEA model: internalization, explanation, and action. When discrepancies arose between the coders, they were resolved through discussion. The results indicated the majority of the Red Book was dedicated to the explanation component of the IDEA model. Conversely, the majority of the Defend the Flock campaign was identified as either internalization or action.The findings in this study can serve as lessons learned to help to improve the effectiveness of instructional risk messaging in similar crises. Specifically, this study recommends that messages be adapted to the intended audience to help them recognize their personal risks, that explanatory messages be intertwined with recommended actions, and that organizations and agencies consider following the USDA's lead and provide complementary materials. For example, some materials may be highly detailed while an accompanying document could provide a simple, brief overview of the risk and recommended actions.
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Date Issued
2018
Identifier
CFE0007023, ucf:52045
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0007023
Investigating compositional variations of S-complex near-Earth asteroids: (1627) Ivar
Title
Investigating compositional variations of S-complex near-Earth asteroids: (1627) Ivar.
Creator
Jones, Jenna, Fernandez, Yan, Britt, Daniel, Campins, Humberto, Howell, Ellen, University of Central Florida
Abstract / Description
We seek to investigate the complexity and heterogeneity of the surfaces of near-Earth asteroids (NEAs). In particular, we are studying the S-complex NEAs, which account for a large portion of the observed near-Earth objects. Here we present our results for (1627) Ivar, an Amor class NEA with taxonomic type Sqw. In 2013, Ivar's large size and close approach to Earth (minimum distance 0.32 AU) provided an opportunity to observe the asteroid over many different viewing angles for an extended...
Show moreWe seek to investigate the complexity and heterogeneity of the surfaces of near-Earth asteroids (NEAs). In particular, we are studying the S-complex NEAs, which account for a large portion of the observed near-Earth objects. Here we present our results for (1627) Ivar, an Amor class NEA with taxonomic type Sqw. In 2013, Ivar's large size and close approach to Earth (minimum distance 0.32 AU) provided an opportunity to observe the asteroid over many different viewing angles for an extended period of time. We collected delay-Doppler radar images and Doppler spectra using the Arecibo Observatory's 2380 MHz radar, and, by incorporating an extensive lightcurve collection, we have constrained the shape and spin state. In addition, we observed Ivar using NASA's IRTF's SpeX mode to gather rotationally resolved reflected and thermal spectra in the near-IR regime. We have created a high-resolution shape model, and we have found Ivar to have a sidereal period of 4.7951689 (&)#177; 0.0000026 hours with a pole at ecliptic longitude and latitude 336(&)deg;, +37(&)deg; ((&)#177; 6(&)deg;) respectively. We also show that Ivar is more elongated than previous studies suggests, with dimensions along the principal axis 15.15 x 6.25 x 5.66 (&)#177; 10%. This model has been incorporated into our thermal modeling code, SHERMAN, in order to determine which reflective, thermal, and surface properties best reproduce our numerous and rotationally resolved spectra. Primarily, we vary thermal inertia, geometric albedo, and crater fraction (surface roughness) although SHERMAN has many parameters that are allowed to vary. Our findings show that Ivar's thermal observations cannot be reproduced with a homogeneous model, but rather a heterogeneous model with a thermal inertia spot, and possibly different crater fraction values, needs to be applied in order to reproduce all of the spectra. Due to the variations in observing geometry for our thermal spectra, the properties of this spot are well constrained. We find that, with this spot, that the values of thermal inertia, geometric albedo, and crater fraction are 80 (&)#177; 20 J m-2 s-1/2 K-1, 0 (-) 0.3, and 0.27 (&)#177; 0.02, respectively. This work shows the advantage of having many datasets for deep study of an individual NEA, and with these results, we will learn more about the detailed regolith and surface properties of Ivar and how those properties compare to those of other NEAs.
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Date Issued
2018
Identifier
CFE0007022, ucf:52044
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0007022