1,994 research outputs found
Radioactive-type dual ablation measuring system, volume 1 Final report
Nucleonic measurement of ablative heat shield material recessio
Evaluation of the Environmental Impact of Milk Quotas
The aim of this study is to examine the environmental impacts of the different systems for allocation and transfer of milk quota under the Common Agricultural Policy (CAP) in individual Member States of the European Union (EU). In particular, it seeks to identify the ways in which differences in the implementation of milk quota regimes can impact on various sectoral and farm management trends and the environmental implications of these
Strategies for enhancing quantum entanglement by local photon subtraction
Subtracting photons from a two-mode squeezed state is a well-known method to
increase entanglement. We analyse different strategies of local photon
subtraction from a two-mode squeezed state in terms of entanglement gain and
success probability. We develop a general framework that incorporates
imperfections and losses in all stages of the process: before, during, and
after subtraction. By combining all three effects into a single efficiency
parameter, we provide analytical and numerical results for subtraction
strategies using photon-number-resolving and threshold detectors. We compare
the entanglement gain afforded by symmetric and asymmetric subtraction
scenarios across the two modes. For a given amount of loss, we identify an
optimised set of parameters, such as initial squeezing and subtraction beam
splitter transmissivity, that maximise the entanglement gain rate. We identify
regimes for which asymmetric subtraction of different Fock states on the two
modes outperforms symmetric strategies. In the lossless limit, subtracting a
single photon from one mode always produces the highest entanglement gain rate.
In the lossy case, the optimal strategy depends strongly on the losses on each
mode individually, such that there is no general optimal strategy. Rather,
taking losses on each mode as the only input parameters, we can identify the
optimal subtraction strategy and required beam splitter transmissivities and
initial squeezing parameter. Finally, we discuss the implications of our
results for the distillation of continuous-variable quantum entanglement.Comment: 13 pages, 11 figures. Updated version for publicatio
'Men give in to chips and beer too easily': How working-class men make sense of gender differences in health
This article, based on qualitative research with working-class men, explores men's perceptions and experiences regarding gender differences in health. It demonstrates how men put forward a range of behavioural/cultural, materialist/structural and psychosocial factors, which were believed to differently impact men's health compared to women. A common theme underpinning their explanations was the ways in which men and women were located within two distinct gender categories. These characterisations were used to explain why health-damaging beliefs and behaviours were more prevalent among men and also why men were better suited for certain kinds of jobs, albeit with potential costs to their health. Men also believed that women were protected from the damaging physical and emotional impact of manual employment because of their primary role within the home and because they were less emotionally robust, which required men to shield women from the stresses they experienced. However, men's emotional withdrawal can also be viewed as another example of how men use whatever resources are available to achieve and maintain dominance over women. Finally, the article demonstrates how a gender- and class-based approach can capture the impact of men's health-related practices alongside the broader cultural and structural influences on men's health
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