Cooling processes in deep, temperate lakes: A review with examples from two lakes in British Columbia

The cooling period in deep, temperate lakes includes the breakdown of the seasonal thermocline, isothermal overturn as the lake cools through 4°C, and winter restratification. The first part of this paper is taken up with a review of the relatively few studies on the seasonal cooling of lakes...

Development and Validation of the Communication Apprehension About Death Scale

Two studies (N=621) were conducted to develop and initially validate the Communication Apprehension About Death Scale (CADS). In Study 1, 302 general public participants completed a preliminary list of 66 items. An exploratory factor analysis identified two distinct dimensions of communication apprehension about death: communication anxiety and communication avoidance. A different group of participants (n=319) participated in Study 2. Participants in Study 2 completed the CADS measure, a fear of death measure, and a general communication apprehension measure. Concurrent validity support was provided through the significant positive correlations between communication apprehension about death and fear of death as well as communication apprehension about death and general communication apprehension. Collectively, the results suggest that the CADS is a reliable and valid self-report measure of communication apprehension about death. We conclude with a discussion of the findings as well as future directions needed to more critically examine CADS

Communication Apprehension about Death, Religious Group Affiliation, and Religiosity: Predictors of Organ and Body Donation Decisions

Communication willingness has previously been identified as an important communication factor in influencing individuals’ decisions to become an organ donor. Missing from this conversation is the role of communication apprehension about death and its impact on donation decisions. The purpose of this study was to examine the relationships between communication apprehension about death, religiosity, and religious affiliation, and donation decisions. Three hundred and thirty-three individuals participated in an online survey. Findings suggest that communication apprehension about death, especially communication avoidance about death, negatively impact donation decisions. Additionally, religiosity and affiliation with a specific religion also negatively impact donation decisions. These variables were also predictors of organ and body donation. The findings show a need for more research on what prevents conversations about donation. Additionally, the stark difference between organ donation likelihood and body donation likelihood underscore the need for communication scholars to examine communication about body donation

Police Crime Arrests in the United States, 2011

Purpose – The purpose of the study is to provide empirical data on cases of police crime arrests during the year 2011. The study identifies and describes incidents in which nonfederal sworn law enforcement officers were arrested for one or more criminal offenses. Research Design & Method – The study is a quantitative content analysis of news articles identified through the Google News search engine using 48 automated Google Alerts queries. The unit of analysis in this study is criminal arrest case (not individual arrested officer). Intercoder Reliability – The Krippendorf’s alpha coefficient is strong (Krippendorf’s α = .9153) across the variables in the study. The overall level of simple percentage of agreement between coders across all of the variables (97.7%) also established a high degree of reliability. Research limitations/implications – The data are limited to cases that involve an official arrest. The data are also the result of a filtering process that includes the exercise of media discretion as to types of news stories reported and content devoted to particular news stories. Practical Implications – The study demonstrates that an annual report on police crime arrests can provide empirical data to better understand this neglected area of research. Originality/value – The study augments the few existing studies on the topic and is the only one known to describe the phenomenon in an annual report of police crime arrests as it occurs within law enforcement agencies nationwide

Concept mapping sociocultural aspects of cervical cancer prevention among African American women

IntroductionFor African American women in Houston, cervical cancer mortality is disproportionate to their racial and ethnic counterparts. Most notably, lack of human papillomavirus (HPV) screening and vaccination as well as late diagnosis increase cervical cancer mortality. However, cervical cancer is largely preventable. While previous research has identified a few social determinants that are specifically related to cervical cancer (e.g., education, income, neighborhood), there may be a host of additional social and cultural factors that contribute to a lack of preventative behavior.MethodsThe present study used concept mapping to explore sociocultural determinants of cervical cancer prevention beliefs among young African American women. N = 15 African American women, ages 18–25, participated in a group concept mapping session focused on cervical cancer knowledge, beliefs about women’s health, and how their social environment and culture play a role in their conceptualization of cervical cancer prevention.DiscussionFive overarching concepts emerged: (1) Screening, (2) Support System, (3) Cervical Cancer 101 (knowledge), (4) Fatalism, and (5) Ease of Prevention.ConclusionThe present study highlights the use of concept mapping for prevention science, particularly in exploratory studies for understanding cervical cancer screening barriers, avenues for intervention, and public health messaging. We discuss the findings and implications for public health research in cervical cancer prevention tailored for African American women

Arctic Ocean Microbial Community Structure before and after the 2007 Record Sea Ice Minimum

Increasing global temperatures are having a profound impact in the Arctic, including the dramatic loss of multiyear sea ice in 2007 that has continued to the present. The majority of life in the Arctic is microbial and the consequences of climate-mediated changes on microbial marine food webs, which are responsible for biogeochemical cycling and support higher trophic levels, are unknown. We examined microbial communities over time by using high-throughput sequencing of microbial DNA collected between 2003 and 2010 from the subsurface chlorophyll maximum (SCM) layer of the Beaufort Sea (Canadian Arctic). We found that overall this layer has freshened and concentrations of nitrate, the limiting nutrient for photosynthetic production in Arctic seas, have decreased. We compared microbial communities from before and after the record September 2007 sea ice minimum and detected significant differences in communities from all three domains of life. In particular, there were significant changes in species composition of Eukarya, with ciliates becoming more common and heterotrophic marine stramenopiles (MASTs) accounting for a smaller proportion of sequences retrieved after 2007. Within the Archaea, Marine Group I Thaumarchaeota, which earlier represented up to 60% of the Archaea sequences in this layer, have declined to <10%. Bacterial communities overall were less diverse after 2007, with a significant decrease of the Bacteroidetes. These significant shifts suggest that the microbial food webs are sensitive to physical oceanographic changes such as those occurring in the Canadian Arctic over the past decade

The EBR-II X501 Minor Actinide Burning Experiment

The X501 experiment was conducted in EBR-II as part of the IFR (Integral Fast Reactor) program to demonstrate minor actinide burning through the use of a homogeneous recycle scheme. The X501 subassembly contained two metallic fuel elements loaded with relatively small quantities of americium and neptunium. Interest in the behavior of minor actinides (MA) during fuel irradiation has prompted further examination of existing X501 data, and generation of new data where needed in support of the U.S. waste transmutation effort. The X501 experiment is one of the few minor actinide-bearing fuel irradiation tests conducted worldwide and knowledge can be gained by understanding the changes in fuel behavior due to addition of MA’s. Of primary interest are the affect of the MA’s on fuel-cladding-chemical-interaction, and the redistribution behavior of americium. The quantity of helium gas release from the fuel and any effects of helium on fuel performance are also of interest. It must be stressed that information presented at this time is based on the limited PIE conducted in 1995-1996, and currently represents a set of observations rather than a complete understanding of fuel behavior

Arctic system on trajectory to new state

The Arctic system is moving toward a new state that falls outside the envelope of glacial-interglacial fluctuations that prevailed during recent Earth history. This future Arctic is likely to have dramatically less permanent ice than exists at present. At the present rate of change, a summer ice-free Arctic Ocean within a century is a real possibility, a state not witnessed for at least a million years. The change appears to be driven largely by feedback-enhanced global climate warming, and there seem to be few, if any processes or feedbacks within the Arctic system that are capable of altering the trajectory toward this “super interglacial” state

The rapid response of the Canada Basin to climate forcing : from bellwether to alarm bells

Author Posting. © Oceanography Society, 2011. This article is posted here by permission of Oceanography Society for personal use, not for redistribution. The definitive version was published in Oceanography 24 no. 3 (2011): 146–159, doi:10.5670/oceanog.2011.66.Sea ice extent in the Arctic Ocean diminished significantly during the first decade of the 2000s, most particularly in the Canada Basin where the loss of both multiyear and first-year ice was greater than in the other three subbasins. Using data collected during basin-wide surveys conducted from 2003–2010 together with data collected during the 1990s and 2000s at one station in the southern Canada Basin, we investigate the response of the Canada Basin water column to this significant decrease in ice cover. Changes were evident from the surface down to the Atlantic layer: some changes were the result of Beaufort Gyre forcing on regional processes, others were the result of Arctic Ocean atmospheric forcing on a hemispheric scale and large-scale advection. These changes have troubling consequences for the ecosystem.We acknowledge support from Fisheries and Oceans Canada, the US National Science Foundation Office of Polar Programs (grant OPP-0424864), and the Canadian International Polar Year office