Economic Cost Analysis of West Nile Virus Outbreak, Sacramento County, California, USA, 2005

Aerial spraying is cost-effective

Nano-optical observation of cascade switching in a parallel superconducting nanowire single photon detector

The device physics of parallel-wire superconducting nanowire single photon detectors is based on a cascade process. Using nano-optical techniques and a parallel wire device with spatially-separate pixels we explicitly demonstrate the single- and multi-photon triggering regimes. We develop a model for describing efficiency of a detector operating in the arm-trigger regime. We investigate the timing response of the detector when illuminating a single pixel and two pixels. We see a change in the active area of the detector between the two regimes and find the two-pixel trigger regime to have a faster timing response than the one-pixel regime.Comment: 11 pages, 2 figure

Crossover from phase fluctuation to amplitude-dominated superconductivity: A model system

We have experimentally studied a model system that demonstrates the crossover from a superconductor that is dominated by phase fluctuations, to one in which the amplitude of the order parameter is the controlling influence on Tc. This model system is comprised of two-dimensional granular Pb with an overlayer of Ag. The system displays many aspects of the phase diagram of the concentration dependence of Tc in the high-Tc superconductors, and this crossover has been applied to explain the phase diagram in that case. We point out the similarities and differences between the model system presented in this paper and the high-Tc superconductors

Discussing parenthood with gay men diagnosed with HIV: a qualitative study of patient and healthcare practitioner perspectives.

BACKGROUND: Research on HIV and reproduction has focused largely on women and heterosexual men. This article examines whether it is relevant to address parenthood in HIV care with gay men and what ways of doing so are most appropriate. METHODS: Qualitative interviews were conducted at four London clinics with 25 men living with HIV, aged 20-45, who did not have children, and 16 HIV clinicians. A thematic analysis identified potential reasons why parenthood was rarely discussed with gay men in HIV care. RESULTS: Two sets of ideas contributed to a lack of conversations about parenthood: clinicians' ideas about what matters to gay men and men's ideas about what it means to be HIV-positive. Both sets of ideas largely excluded having children, with patients and practitioners similarly unlikely to raise the topic of parenthood in the clinic. Contrary to what clinician commonly assumed, many men expressed interest in receiving more information, highlighting the importance of reassuring people upon diagnosis that it is possible to become parents while living with HIV. CONCLUSIONS: Parenting desires and intentions were rarely discussed with men in HIV care. Our findings illuminate the potentially beneficial effects of emphasising that having children is a possibility at diagnosis, regardless of patients' gender or sexuality. Conveying this information seems meaningful, not only to men who want to become parents in the future but also to others, as it appears to alleviate fears about mortality and ill health.British HIV Association Isaac Newton Trust Leverhulme Trust (ECF-2018-146) Wellcome Trust (100606/Z/12/Z

Reproductive Failure in UK Harbour Porpoises Phocoena phocoena : Legacy of Pollutant Exposure?

This research was supported by a Marie Curie International Outgoing Fellowship within the Seventh European Community Framework Programme (Project Cetacean-stressors, PIOF-GA-2010-276145 to PDJ and SM). Additional funding was provided through the Agreement on the Conservation of Small Cetaceans of the Baltic, North East Atlantic, Irish and North Seas (ASCOBANS) (Grants SSFA/2008 and SSFA / ASCOBANS / 2010 / 5 to SM). Analysis of Scottish reproductive and teeth samples was funded by the EC-funded BIOCET project (BIOaccumulation of persistent organic pollutants in small CETaceans in European waters: transport pathways and impact on reproduction, grant EVK3-2000-00027 to GJP), and Marine Scotland (GJP). Samples examined in this research were collected under the collaborative Cetacean Strandings Investigation Programme (http://ukstrandings.org/), which is funded by the Department for Environment, Food and Rural Affairs (Defra) and the UK’s Devolved Administrations in Scotland and Wales (http://sciencesearch.defra.gov.uk/Defaul​t.aspx?Menu=Menu&Module=More&Location=No​ne&Completed=0&ProjectID=15331) (grants to PDJ, RD). UK Defra also funded the chemical analysis under a service-level agreement with the Centre for Environment, Fisheries and Aquaculture Science (grants to RJL, JB). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewedPublisher PD

Evaluating Diversion Alternatives Affecting Environmental Flows and Temperatures

Surface water diversions for irrigation demands are necessary for sustaining agriculture in arid and semi-arid climates throughout the western United States. In many places, however, these diversions have created low flow conditions that make resident and anadromous fish rearing and passage impossible because of either physical constraints caused by flow depths or thermal blockages due to increased stream temperatures. The two particular temperature thresholds that are of most concern occur when the 7-day maximum stream temperatures increase above the inhibition temperature of 20 degrees C (68 degrees F) and the lethal temperature of 24 degrees C (75 degrees F). In order to increase water supplies for improving bull trout, chinook, and steelhead habitat, the impacts of modifications to irrigation district diversions in June and August were completed as part of a habitat conservation plan (HCP) for the Walla Walla River in Oregon and Washington. HeatSource 7 was used to evaluate the impacts of various flow bypass scenarios on flow and thermal regimes of the Walla Walla River system. Based on streamflow analysis, water years 2002 and 2003 were selected representing low and average flow conditions in the watershed. Analyses indicate that maximum stream temperatures routinely exceed both threshold values in the lower reaches of the river under existing flow and diversion conditions particularly in the late summer time frame. For August 2002, the maximum daily temperature variations were generally less than 4 degrees C under scenarios ranging from existing diversion conditions to complete bypass of agricultural water demands. June results are expected to show similar variations. The results indicated that flow augmentation alone will not be economically effective in terms of mitigating temperature. Investigations are continuing to determine the impact of riparian restoration impacts