5,143 research outputs found
Volcanic smog and cardiometabolic health: Hawaiian hypertension?
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/149349/1/jch13500.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/149349/2/jch13500_am.pd
A Comparison of Risk Exposure in Aquaculture and Agricultural Businesses
Agriculture and aquaculture have common features associated with their biological nature affecting risk exposure of the businesses. The aim of this paper is to compare risk exposure in salmon farming and agricultural enterprises in Norway by using an implicit error component model to examine the risk structure of yields, prices and economic returns at the farm level. Results indicate a higher farm-level year-to-year variability in yields, prices and economic returns in salmon farming than in agricultural enterprises. The variability in livestock enterprises was generally lower than for crop enterprises. Return on assets was highest in salmon farming with an average annual return of 9.2%. All of the agricultural farm types exhibited a negative average return on assets on average. Stochastic dominance tests of the distribution of economic returns from aquaculture and agricultural farm types showed salmon farming to be the most risk efficient alternative and salmon farming was most attractive from an investor’s perspective.Risk analysis, variability, Norway, Risk and Uncertainty,
Recommended from our members
Sexual Health Education: an evaluation of the Northumbria Integrated Sexual Health Education (NISHE) Workforce Development Package delivered by UWE, Bristol
Background:
Sexual health and wellbeing is a central focus of public health policy and service development in England (Department of Health (DH) 2013a, 2013b, Public Health England (PHE) 2015). Historically, services in the UK have been delivered through Family Planning clinics for contraceptive services or Genito-Urinary (GUM) clinics for sexual health issues. Current NHS Service Specifications for sexual health services emphasise an integrated service, delivered by a single health professional (DH 2013b), which has significant implications for the sexual health workforce. Within the South West, there was a disparity of sexual health education provision with little emphasis on the practical competence element. In order to equip sexual health nurses with the appropriate knowledge and skills to deliver an integrated sexual health service, the University of the West of England (UWE) entered a formal agreement with a partner university who had developed an educational package. UWE commenced delivery of two new sexual health modules in September 2013, incorporating both a newly developed classroom delivered Foundations of Sexual Health module and an established Integrated Sexual Health Education module which incorporated a practice placement, mentor support and blended learning approaches to deliver the theory element. This package had previously been successfully delivered in the North of England (McNall and Kain 2010). Aims This research, conducted between 2013 and 2015, explored the transferability of the model to the South West region and the degree to which the educational delivery met service demands in relation to integrated sexual health provision.
Research Methodology:
Data were collected using quantitative and qualitative methods, specifically longitudinal baseline and follow-up survey data from students (n=49) using two validated self-efficacy scales, focus groups with students (n=22) and semi-structured interviews with students (n=7) and strategic managers (n=6). Quantitative analysis of questionnaire data was conducted on baseline and follow-up data using SPSS version 2.2. The data exploring self-efficacy were analysed using Wilcoxon tests and Friedman’s tests. Descriptive statistics and frequencies were used to examine the characteristics of the study population. Qualitative analysis was conducted through thematic analysis and constant comparative methods (Braun and Clarke 2006).
Key Findings:
The results indicated that students who undertook the modules demonstrated significant increases in self-efficacy when using the evidence base in sexual health practice and when communicating in difficult situations. The highest percentage point increase in self-efficacy occurred when the students completed both modules rather than one in isolation. Service manager and student expectation regarding the instructional immediacy and technological specification of the e-learning package were not always met but the electronic mode of delivery was praised for its flexibility, especially important given the large geographical spread of students. Service managers and students were aware of the move to integrated service delivery but were often frustrated by structural restraints that impeded innovation and practice development, such as fragmented commissioning arrangements or lack of collocated services. Although these restraints limited the impact that new learning could have on the service that was offered to patients, there was some evidence that the students were using their professional autonomy to manipulate the system, in line with Lipsky’s (1980) concept of street level bureaucracy.
Recommendations:
Consideration should be given to the balance of e-learning and face-to-face contact within modules, to enhance instructional immediacy and increase student satisfaction. E-learning packages should be reviewed to meet student expectation by incorporating interactive technology and opportunities for collaborative learning. In addition, where service delivery is in a state of flux, modules should incorporate elements of leadership development to enable practitioners to initiate and manage change in practice
Acute Blood Pressure Responses in Healthy Adults During Controlled Air Pollution Exposures
Exposure to air pollution has been shown to cause arterial vasoconstriction and alter autonomic balance. Because these biologic responses may influence systemic hemodynamics, we investigated the effect of air pollution on blood pressure (BP). Responses during 2-hr exposures to concentrated ambient fine particles (particulate matter < 2.5 μm in aerodynamic diameter; PM(2.5)) plus ozone (CAP+O(3)) were compared with those of particle-free air (PFA) in 23 normotensive, non-smoking healthy adults. Mean concentrations of PM(2.5) were 147 ± 27 versus 2 ± 2 μg/m(3), respectively, and those of O(3) were 121 ± 3 versus 8 ± 5 ppb, respectively (p < 0.0001 for both). A significant increase in diastolic BP (DBP) was observed at 2 hr of CAP+O(3) [median change, 6 mm Hg (9.3%); binomial 95% confidence interval (CI), 0 to 11; p = 0.013, Wilcoxon signed rank test] above the 0-hr value. This increase was significantly different (p = 0.017, unadjusted for basal BP) from the small 2-hr change during PFA (median change, 1 mm Hg; 95% CI, −2 to 4; p = 0.24). This prompted further investigation of the CAP+O(3) response, which showed a strong association between the 2-hr change in DBP (and mean arterial pressure) and the concentration of the organic carbon fraction of PM(2.5) (r = 0.53, p < 0.01; r = 0.56, p < 0.01, respectively) but not with total PM(2.5) mass (r ≤ 0.25, p ≥ 0.27). These findings suggest that exposure to environmentally relevant concentrations of PM(2.5) and O(3) rapidly increases DBP. The magnitude of BP change is associated with the PM(2.5) carbon content. Exposure to vehicular traffic may provide a common link between our observations and previous studies in which traffic exposure was identified as a potential risk factor for cardiovascular disease
TORCH: A Cherenkov Based Time-of-Flight Detector
TORCH is a novel high-precision time-of-flight detector suitable for large area applications and
covering the momentum range up to 10 GeV/c. The concept uses Cherenkov photons produced
in a fused silica radiator which are propagated to focussing optics coupled to fast photodetectors.
For this purpose, custom MCP-PMTs are being produced in collaboration with industrial partners.
The development is divided into three phases. Phase 1 addresses the lifetime requirements for
TORCH, Phase 2 will customize the MCP-PMT granularity and Phase 3 will deliver prototypes
that meet the TORCH requirements. Phase 1 devices have been successfully delivered and initial
tests show stable gain performance for integrated anode current >5 C/cm2
and a single photon
time resolution of ≤ 30 ps. Initial simulations indicate the single photon timing resolution of the
TORCH detector will be ∼70 ps
Trigger point manual therapy for the treatment of chronic non-cancer pain in adults
This is the protocol for a review and there is no abstract. The objectives are as follows:
To determine the effectiveness of trigger point manual therapy for treating chronic non-cancer pain in adults
Thin disc, Thick Disc and Halo in a Simulated Galaxy
Within a cosmological hydrodynamical simulation, we form a disc galaxy with
sub- components which can be assigned to a thin stellar disc, thick disk, and a
low mass stellar halo via a chemical decomposition. The thin and thick disc
populations so selected are distinct in their ages, kinematics, and
metallicities. Thin disc stars are young (<6.6 Gyr), possess low velocity
dispersion ({\sigma}U,V,W = 41, 31, 25 km/s), high [Fe/H], and low [O/Fe]. The
thick disc stars are old (6.6<age<9.8 Gyrs), lag the thin disc by \sim21 km/s,
possess higher velocity dispersion ({\sigma}U,V,W = 49, 44, 35 km/s),
relatively low [Fe/H] and high [O/Fe]. The halo component comprises less than
4% of stars in the "solar annulus" of the simulation, has low metallicity, a
velocity ellipsoid defined by ({\sigma}U,V,W = 62, 46, 45 km/s) and is formed
primarily in-situ during an early merger epoch. Gas-rich mergers during this
epoch play a major role in fuelling the formation of the old disc stars (the
thick disc). This is consistent with studies which show that cold accretion is
the main source of a disc galaxy's baryons. Our simulation initially forms a
relatively short (scalelength \sim1.7 kpc at z=1) and kinematically hot disc,
primarily from gas accreted during the galaxy's merger epoch. Far from being a
competing formation scenario, migration is crucial for reconciling the short,
hot, discs which form at high redshift in {\Lambda}CDM, with the properties of
the thick disc at z=0. The thick disc, as defined by its abundances maintains
its relatively short scale-length at z = 0 (2.31 kpc) compared with the total
disc scale-length of 2.73 kpc. The inside-out nature of disc growth is
imprinted the evolution of abundances such that the metal poor {\alpha}-young
population has a larger scale-length (4.07 kpc) than the more chemically
evolved metal rich {\alpha}-young population (2.74 kpc).Comment: Submitted to MNRAS. This version after helpful referee comments.
Comments welcome to [email protected]
- …