Dose Creep: Is It Real or Imagined?

Two types of patient-centered care in the radiology profession are service and safety. Service relates to the technologist being a patient advocate by effectively communicating, building relationships and providing care. Two types of safety in the radiologic sciences profession relate to contrast media and radiation safety. The focus of this study was on radiation safety. The project was designed to evaluate exposure indicator values from radiographic procedures performed by junior and senior radiography students during the month of March 2013. The mean exposure indicator values for radiographic procedures were evaluated by all students and then by student rank (juniors and seniors). The type of procedure and student rank (juniors and seniors) had an impact on exposure indicator values. The results revealed that dose creep occurred during radiographic procedures performed by student radiographers. It was determined that there is a need for additional education for student radiographers regarding selection of appropriate exposure factors to minimize dose creep

How Twitter Has Changed the Way Advertisers Communicate

Since its inception in 2006 Twitter has become one of the most prevalent social media platforms, with over 330 million active users and over 500 million “tweets” sent daily (Aslam, 2018). This research project will conduct a content analysis of specific tweets from the Wendy’s corporation official Twitter account in addition to qualitatively evaluating scholarly articles on the topic of social media, marketing, and online communication. The key focus is how Twitter creates what is referred to as a “dialogic loop,” a pattern that only develops in online communication. This paper will highlight how Twitter has changed the way advertisers utilize social media to promote their organization’s goals. Wendy’s establishes dialogic loops primarily by using retweets and humor to connect with individuals, by engaging with other organizations positively and negatively, and by utilizing a character spokesperso

Salt redistribution during freezing of saline sand columns with applications to subsea permafrost

Thesis (Ph.D.) University of Alaska Fairbanks, 1987Laboratory experiments were designed to investigate salt redistribution during the freezing of saline sand columns and to obtain information on salt movement in saturated sands and reconstituted subsea permafrost samples. The results of these experiments were combined with results from field investigations of subsea permafrost at Prudhoe Bay, Alaska to develop an improved understanding of salt redistribution during freezing and the movement of salt in the seabed sediments. These processes can produce soil solution salinities in the sediments greater than about 50 ppt. Comparison of spring and fall salinity profiles indicate salt movement with velocities of at least 2 m/year. Laboratory freezing (downward) tests of saline sand columns show significant salt redistribution at growth rates between 0.1 and 2 cm/day. Salt movement was observed with velocities of at least 2 cm/day. Salt movement in the unfrozen soil solution in partially frozen sand appears to be the result of gravity drainage. Freezing upward produced no significant salt redistribution. Salt fingering experiments showed that salt fingers could move with velocities of several cm/hr and suggest that it may be a major mechanism for rapid salt movement in subsea permafrost. Fingers (freshwater) at a thawing fresh ice boundary overlain by thawed saline soil solution displayed similar rapid movement behavior. Laboratory measurements of the hydraulic conductivity, K, of subsea permafrost samples yielded values that were 10\sp2 to 10\sp3 times greater than previously reported in-situ measurements. While it is difficult to apply the laboratory results to subsea permafrost under field conditions, these greater values for K and the large salt fingering velocities suggest that gravity-driven convection, in the form of salt fingering, should be considered as a primary mechanism for rapid salt transport in subsea permafrost

Middle East Media Landscapes: Egypt, Libya, Tunisia, Syria, and Yemen

Following the youth-led reformative wave that swept the Middle East in 2011 during what came to be known as the Arab Spring, the media landscape in the region has continued to diversify and change alongside technology and social media. However, in order to deal with a large youth demographic that is seeking increased civil liberties and equality, and to prevent another series of protests, many governments are placing restrictions and limitations on the press, internet access, and censoring individuals who are critical of government or politically active. Through a critical analysis of the current media landscapes of five nations; Egypt, Libya, Tunisia, Syria, and Yemen, as well as specific examples of media suppression and censorship, this research establishes a global perspective on free speech and suggest a protocol for youth engagement through social media and understand how regulation translates into censorship

Senior Design Final Report: Trinity University Biodiesel Initiative

In the past year it has been the goal of the Trinity University Biodiesel Initiative to design and build a biodiesel processing plant capable of producing B100 biodiesel. The plant and operational information will be handed over to the Physical Plant for continued operation. This report details the design, construction, testing and operation of this processing plant

When the magic closes: Examining how Disney fans coped with theme park and resort closures amid the COVID-19 pandemic

This essay discusses a qualitative investigation we conducted with fans of the Disney parks and resorts during the summer of 2020 regarding the company’s handling of the COVID-19 pandemic. Specifically, 22 people responded to open-ended questions from an online survey to discuss their views of the closures and planned reopenings of the Disney parks and resorts amid the early days of the pandemic. Using social identity theory (Tajfel, 1978) and the theory of planned behavior (Ajzen, 1991), we discuss how fans react to and cope with the temporary loss of a favorite activity and how companies in the themed entertainment industry can work to engage customers during such times. Along with implications for practitioners working in themed entertainment, we also introduce areas of future investigation important to further understanding of fan behavior amid uncertainty

On-Farm Research Guide

Many growers want to increase crop productivity and farm profitability. On-farm research is a way growers can achieve this goal by discovering answers to important questions about the benefits of using specific products or practices they are uncertain about or are unproven. Validating the efficacy of already-implemented practices is another important reason to do on-farm research trials (Nielsen, 2008). Each farm is unique and can benefit from individualized on-farm research, especially since university and industry researchers cannot study every product or practice for every unique field or farm growing condition. This how-to guide covers benefits and best practices for conducting successful on-farm research

Microbial iron uptake as a mechanism for dispersing iron from deep-sea hydrothermal vents

Author Posting. © The Author(s), 2014. This is the author's version of the work. It is posted here by permission of Nature Publishing Group for personal use, not for redistribution. The definitive version was published in Nature Communications 5 (2014): 3192, doi:10.1038/ncomms4192.Deep-sea hydrothermal vents are a significant source of oceanic iron. Although hydrothermal iron rapidly precipitates as inorganic minerals upon mixing with seawater, it can be stabilized by organic matter and dispersed more widely than previously recognized. The nature and source of this organic matter is unknown. Here we show that microbial genes involved in cellular iron uptake are highly expressed in the Guaymas Basin deep-sea hydrothermal plume. The nature of these microbial iron transporters, taken together with the low concentration of dissolved iron and abundance of particulate iron in the plume, indicates that iron minerals are the target for this microbial scavenging and uptake. Our findings indicate that cellular iron uptake is a major process in plume microbial communities and suggest new mechanisms for generating Fe-C complexes. This “microbial iron pump” could represent an important mode of converting hydrothermal iron into bioavailable forms that can be dispersed through the oceans.This project is funded by the Gordon and Betty Moore Foundation through grant GBMF 2609 to GJD/JAB/BMT and by the National Science Foundation through grants OCE 1029242 to GJD, and R2K grant OCE1038055 to JAB/BMT. We thank the University of Michigan Rackham Graduate School Faculty Research Fellowship Program for their support.2014-08-0

The Iowa Homemaker vol.26, no.1

Keeping Up With Today, Joyce Edgar, page 2 Foods Graduate Supervises Hawaiian Canteen, Ann Koebel, page 3 First Introduction, Maryann Jones, page 4 Vicky Views Veishea, Charlene Stettler, page 6 She Cooks for the Clouds, Marlyn Cody, page 7 Look Toward Your Future, page 8 What’s New in Home Economics, Marjorie Clampitt, page 10 Pass the Rolls, Mary Ann Hakes, page 12 Modern Education Features Audio-Visual Aids, Nancy Baker, page 13 Hospital Kitchen Affords Experience, Maxine Burch, page 14 Across Alum Desks, Mary Neff, page 17 Roberts Hall Honors a Career of Service, Natalie Benda, page 18 Wardrobe Revivers for Spring, June Welch, page 19 Alums in the News, Goldie Rouse, page 2

Patterning of wound-induced intercellular Ca2+ flashes in a developing epithelium

Differential mechanical force distributions are increasingly recognized to provide important feedback into the control of an organ's final size and shape. As a second messenger that integrates and relays mechanical information to the cell, calcium ions (Ca2+) are a prime candidate for providing important information on both the overall mechanical state of the tissue and resulting behavior at the individual-cell level during development. Still, how the spatiotemporal properties of Ca2+ transients reflect the underlying mechanical characteristics of tissues is still poorly understood. Here we use an established model system of an epithelial tissue, the Drosophila wing imaginal disc, to investigate how tissue properties impact the propagation of Ca2+ transients induced by laser ablation. The resulting intercellular Ca2+ flash is found to be mediated by inositol 1,4,5-trisphosphate and depends on gap junction communication. Further, we find that intercellular Ca2+ transients show spatially non-uniform characteristics across the proximal–distal axis of the larval wing imaginal disc, which exhibit a gradient in cell size and anisotropy. A computational model of Ca2+ transients is employed to identify the principle factors explaining the spatiotemporal patterning dynamics of intercellular Ca2+ flashes. The relative Ca2+ flash anisotropy is principally explained by local cell shape anisotropy. Further, Ca2+ velocities are relatively uniform throughout the wing disc, irrespective of cell size or anisotropy. This can be explained by the opposing effects of cell diameter and cell elongation on intercellular Ca2+ propagation. Thus, intercellular Ca2+ transients follow lines of mechanical tension at velocities that are largely independent of tissue heterogeneity and reflect the mechanical state of the underlying tissue