7,511 research outputs found
Youths Perceive Some Improvement in Substance Abuse Prevention Knowledge, Skills, and Assets from Participation in 4-H Health Rocks!
The 4-H Health Rocks! curriculum aims to reduce use of tobacco, alcohol, and other drugs and promote healthful lifestyle choices among 8- to 14-year-old youths. A retrospective post-then-pre survey of Tennessee participants was aimed at describing the demographic characteristics of participants and investigating respondents\u27 perceptions of program outcomes. Although positive, significant results in youths\u27 perceived knowledge, skills, and assets were found, the majority of youths reported no change from before program participation to after program participation. Recommendations include addressing the need for additional research that aligns respondents\u27 perceptions with program delivery settings and the need to explore different evaluation approaches
Regional variations in the extent and pattern of grey matter demyelination in multiple sclerosis: a comparison between the cerebral cortex, cerebellar cortex, deep grey matter nuclei and the spinal cord
Topological field theory and physics
Topological Yang-Mills theory with the Belavin-Polyakov-Schwarz-Tyupkin
instanton is solved completely, revealing an underlying multi-link
intersection theory. Link invariants are also shown to survive the coupling to
a certain kind of matter (hyperinstantons). The physical relevance of
topological field theory and its invariants is discovered. By embedding
topological Yang-Mills theory into pure Yang-Mills theory, it is shown that the
topological version TQFT of a quantum field theory QFT allows us to formulate
consistently the perturbative expansion of QFT in the topologically nontrivial
sectors. In particular, TQFT classifies the set of good measures over the
instanton moduli space and solves the inconsistency problems of the previous
approaches. The qualitatively new physical implications are pointed out. Link
numbers in QCD are related to a non abelian analogoue of the Aharonov-Bohm
effect.Comment: 23 pages, 1 figure. Revision: additional explanation
Prevalence of chronic pain in the UK : a systematic review and meta-analysis of population studies
Acknowledgements The authors are grateful for the input of Professor Blair Smith (University of Dundee): his counsel early in the project, and his advice and comments regarding the search strategy; and Professor Danielle van der Windt (Keele University) for helpful advice and comments. Funding The British Pain Society provided financial assistance to AF with the costs of this project. PC was partly supported by an Arthritis Research UK Primary Care Centre grant (reference: 18139).Peer reviewedPublisher PD
Experimental data on the single spin asymmetry and their interpretations by the chromo-magnetic string model
An attempt is made to interpret the various existing experimental data on the
single spin asymmetries in inclusive pion production by the polarized proton
and antiproton beams. As the basis of analysis the chromo-magnetic string model
is used. A whole measured kinematic region is covered. The successes and fails
of such approach are outlined. The possible improvements of model are
discussed.Comment: 17 pages, 3 figure
Representing addition and subtraction : learning the formal conventions
The study was designed to test the effects of a structured intervention in teaching children to represent addition and subtraction. In a post-test only control group design, 90 five-year-olds experienced the intervention entitled Bi-directional Translation whilst 90 control subjects experienced typical teaching. Post-intervention testing showed some significant differences between the two groups both in terms of being able to effect the addition and subtraction operations and in being able to determine which operation was appropriate. The results suggest that, contrary to historical practices, children's exploration of real world situations should precede practice in arithmetical symbol manipulation
Engineering a static verification tool for GPU kernels
We report on practical experiences over the last 2.5 years related to the engineering of GPUVerify, a static verification tool for OpenCL and CUDA GPU kernels, plotting the progress of GPUVerify from a prototype to a fully functional and relatively efficient analysis tool. Our hope is that this experience report will serve the verification community by helping to inform future tooling efforts. © 2014 Springer International Publishing
On the origin of the -transition in liquid Sulphur
Developing a novel experimental technique, we applied photon correlation
spectroscopy using infrared radiation in liquid Sulphur around ,
i.e. in the temperature range where an abrupt increase in viscosity by four
orders of magnitude is observed upon heating within few degrees. This allowed
us - overcoming photo-induced and absorption effects at visible wavelengths -
to reveal a chain relaxation process with characteristic time in the ms range.
These results do rehabilitate the validity of the Maxwell relation in Sulphur
from an apparent failure, allowing rationalizing the mechanical and
thermodynamic behavior of this system within a viscoelastic scenario.Comment: 5 pages, 4 eps figures, accepted in Phys. Rev. Let
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