2,442 research outputs found
Distractor efficiency in an item pool for statistics classroom exam: assessing its relation with items’ cognitive level classified according to Bloom’s Taxonomy
Trends for coronary heart disease and stroke mortality among migrants in England and Wales, 1979–2003: slow declines notable for some groups
<p>OBJECTIVE: To examine trends in coronary heart disease and stroke mortality in migrants to England and Wales.</p>
<p>DESIGN: Cross-sectional.</p>
<p>OUTCOME MEASURES: Age-standardised and sex-specific death rates and rate ratios 1979-83, 1989-93 and 1999-2003.</p>
<p>RESULTS: Coronary mortality fell among migrants, more so in the second decade than the first. Rate ratios for coronary mortality remained higher for men and women from Scotland, Northern Ireland, Republic of Ireland and South Asia, and lower for men from Jamaica, other Caribbean countries, West Africa, Italy and Spain. Rate ratios increased for men from Jamaica (1979-83: 0.45, 0.40 to 0.50; 1999-2003: 0.81, 0.73 to 0.90), Pakistan (1979-83: 1.14, 1.04 to 1.25; 1999-2003: 1.93, 1.81 to 2.06), Bangladesh (1979-83: 1.36, 1.15 to 1.60; 1999-2003: 2.11, 1.90 to 2.34), Republic of Ireland (1979-1983: 1.18, 1.15 to 1.21; 1999-2003: 1.45, 1.39 to 1.52) and Poland (1979-83: 1.17, 1.09 to 1.25; 1999-2003: 1.97, 1.57 to 2.47), and for women from Jamaica (1979-83: 0.63, 0.52 to 0.77; 1999-2003: 1.23, 1.06 to 1.42) and Pakistan (1979-83: 1.14, 0.88 to 1.47; 1999-2003: 2.45, 2.19 to 2.74), owing to smaller declines in death rates than those born in England and Wales. Rate ratios for stroke mortality remained higher for migrants. As a result of smaller declines, rate ratios increased for men from Pakistan (1979-1983: 0.99, 0.76 to 1.29; 1999-2003: 1.58, 1.35 to 1.85), Scotland (1979-1983: 1.11, 1.04 to 1.19; 1999-2003: 1.30, 1.19 to 1.42) and Republic of Ireland (1979-1983: 1.27, 1.19 to 1.36; 1999-2003: 1.67, 1.52 to 1.84).</p>
<p>CONCLUSION: For groups with higher mortality than people born in England and Wales, mortality remained higher. Smaller declines led to increasing disparities for some groups and to excess coronary mortality for women from Jamaica. Maximising the coverage of prevention and treatment programmes is critical.</p>
Isoscaling and the symmetry energy in spectator fragmentation
Isoscaling and its relation to the symmetry energy in the fragmentation of
excited residues produced at relativistic energies were studied in two
experiments conducted at the GSI laboratory. The INDRA multidetector has been
used to detect and identify light particles and fragments with Z <= 5 in
collisions of 12C on 112,124Sn at incident energies of 300 and 600 MeV per
nucleon. Isoscaling is observed, and the deduced parameters decrease with
increasing centrality. Symmetry term coefficients, deduced within the
statistical description of isotopic scaling, are near gamma = 25 MeV for
peripheral and gamma < 15 MeV for central collisions.
In a very recent experiment with the ALADIN spectrometer, the possibility of
using secondary beams for reaction studies at relativistic energies has been
explored. Beams of 107Sn, 124Sn, 124La, and 197Au were used to investigate the
mass and isospin dependence of projectile fragmentation at 600 MeV per nucleon.
The decrease of the isoscaling parameters is confirmed and extended over the
full fragmentation regime covered in these reactions.Comment: Proceedings of the IWM2005, Catania, Italy, Nov 200
Women’s groups’ perceptions of neonatal and infant health problems in rural Malawi
AimsTo present the perceptions of women in rural Malawi regarding the health problems affecting neonates and infants and to explore the relevance of these perceptions for child health policy and strategy in Malawi.MethodsWomen’s groups in Mchinji district identified newborn and infant health problems (204 groups, 3484 women), prioritised problems they considered most important (204 groups, 3338 women) and recorded these problems on monitoring forms. Qualitative data was obtained through 6 focus-groupdiscussions with the women’s groups and 22 interviews with individuals living in women’s group communities but not attending groups.ResultsWomen in Malawi do not define the neonatal period accordingto any epidemiological definition. In order of importance they identified and prioritised the following problems for newborns and infants: diarrhoea, infection, preterm birth, tetanus, malaria, asphyxia, respiratory tract infection, hypothermia, jaundice, convulsions and malnutrition.ConclusionThis study suggests that women in rural Malawi collectively have a developed understanding of neonatal and infant health problems. This makes a strong argument for the involvement of lay people in policy and strategy development and also suggests that this capacity, harnessed and strengthened through community mobilisation approaches, has thepotential to improve neonatal and infant health and reduce mortality
Energy performances assessment of extruded and 3d printed polymers integrated into building envelopes for a south Italian case study
Plastic materials are increasingly becoming used in the building envelope, despite a lack of investigation on their effects. In this work, an extruded Acrylonitrile-Butadiene-Styrene panel has been tested as a second-skin layer in a ventilated facade system using a full-scale facility. The experimental results show that it is possible to achieve performances very similar to conventional materials. A numerical model has then been developed and used to investigate the performances of plastic and composite polymer panels as second-skin layers. The experimental data has been used to verify the behavior of the numerical model, from a thermal point of view, showing good reliability, with a root mean square error lower than 0.40â—¦C. This model has then been applied in different refurbishment cases upon varying: The polymer and the manufacturing technology (extruded or 3D-printed panels). Eight refurbishment case studies have been carried out on a typical office building located in Napoli (Italy), by means of a dynamic simulation software. The simulation results show that the proposed actions allow the reduction of the thermal and cooling energy demand (up to 6.9% and 3.1%, respectively), as well as the non-renewable primary energy consumption (up to 2.6%), in comparison to the reference case study
Missing data in longitudinal studies: Comparison of multiple imputation methods in a real clinical setting
Stochastic Model for the Motion of a Particle on an Inclined Rough Plane and the Onset of Viscous Friction
Experiments on the motion of a particle on an inclined rough plane have
yielded some surprising results. For example, it was found that the frictional
force acting on the ball is viscous, {\it i.e.} proportional to the velocity
rather than the expected square of the velocity. It was also found that, for a
given inclination of the plane, the velocity of the ball scales as a power of
its radius. We present here a one dimensional stochastic model based on the
microscopic equations of motion of the ball, which exhibits the same behaviour
as the experiments. This model yields a mechanism for the origins of the
viscous friction force and the scaling of the velocity with the radius. It also
reproduces other aspects of the phase diagram of the motion which we will
discuss.Comment: 19 pages, latex, 11 postscript figures in separate uuencoded fil
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