5,162 research outputs found
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,
Analysis of Charm Pair Production at the LHC
The DGLAP and CCFM approaches to perturbative QCD evolution have been investigated by examining correlations of charmed hadron pairs in collisions at TeV. The theoretical models are compared to the data taken by the LHCb experiment. Differences in the parton kinematics between the two approaches are discussed. In general a model incorporating NLO diagrams matched to parton showers describes the data best
The 2017 ACC/AHA Hypertension Guidelines: Should they have included proven nonpharmacological blood pressure‐lowering strategies such as Transcendental Meditation?
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/148410/1/jch13488_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/148410/2/jch13488.pd
Non-Restarting CUSUM charts and Control of the False Discovery Rate
Cumulative sum (CUSUM) charts are typically used to detect changes in a
stream of observations e.g. shifts in the mean. Usually, after signalling, the
chart is restarted by setting it to some value below the signalling threshold.
We propose a non-restarting CUSUM chart which is able to detect periods during
which the stream is out of control. Further, we advocate an upper boundary to
prevent the CUSUM chart rising too high, which helps detecting a change back
into control. We present a novel algorithm to control the false discovery rate
(FDR) pointwise in time when considering CUSUM charts based on multiple streams
of data. We prove that the FDR is controlled under two definitions of a false
discovery simultaneously. Simulations reveal the difference in FDR control when
using these two definitions and other desirable definitions of a false
discovery.Comment: 10 pages, 2 figure
SOME ASPECTS OF ENERGY SAVING OF BURDEN MATERIAL IN THE BLAST FURNACE
To determine the possibility of self-stabilization effect for burden
surface texture and gas flow in operating blast furnace under the proper conditions
was experimentally proved for the first time, as well as the reasons of the effect
disruption
Analysis of Charm Pair Production at the LHC
The DGLAP and CCFM approaches to perturbative QCD evolution have been
investigated by examining correlations of charmed hadron pairs in
collisions at TeV. The theoretical models are compared to the data
taken by the LHCb experiment. Differences in the parton kinematics between the
two approaches are discussed. In general a model incorporating NLO diagrams
matched to parton showers describes the data best
Introduction
LSNSs include a group of interconnected nodes and have attracted increasing attention from researchers due to its widespread applications in sensor networks, surveillance systems, intelligent transportation management systems, etc. The nodes in LSNSs exchange information through a communication graph, which is a time-varying graph or a time-invariant graph. Based on the communication topology, nodes in LSNSs are coupled, which give rise to a variety of collective complexities in the overall dynamical properties of LSNSs.Heather Brook, Deane Fergie, Michael Maeorg
and Dee Michel
How much do delayed health care seeking, delayed care provision and diversion from primary care contribute to the transmission of STIs
Objectives: To explore the changing pattern of condom use from 1990 to 2000; to identify sociodemographic and behavioural factors associated with condom use; and reasons for condom use in 2000. Methods: Large probability sample surveys administered among those resident in Britain aged 16–44 (n = 13 765 in 1990, n = 11 161 in 2000). Face to face interviews with self completion components collected sociodemographic, behavioural, and attitudinal data. Results: Condom use in the past year among sexually active 16–24 year old men increased from 61.0% in 1990 to 82.1% in 2000 (p<0.0001), and from 42.0% to 63.2% (p<0.0001) among women of the same age, with smaller increases among older age groups. Among individuals reporting at least two partners in the previous 4 week period, approximately two thirds reported inconsistent or no condom use (63.1% (95% CI 55.9% to 69.8%) of the men and 68.5% (95% CI 57.6% to 77.7%) of the women). Conclusions: Rates of condom use increased substantially between 1990 and 2000, particularly among young people. However, inconsistent condom use by individuals with high rates of partner acquisition may contribute significantly to the recent resurgence in STIs. This group is an important target for intensive and specific sexual health interventions
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