179,422 research outputs found
Physical inactivity in prevails in later life
The majority of people over 70 years may self-report themselves to be in good health but just being older means they are more likely to experience a range of health related ups and downs than in their younger years. One explanation for this is that the older population carries a progressively heavier burden of chronic disease and disability than their younger cohorts. With a changing demographic and in particular an ageing population, it is not surprising that politicians and health professionals are keen to intervene – mostly because of a presumed high cost of not-so-good health
Program to calculate pure angular momentum coefficients in jj-coupling
A program for computing pure angular momentum coefficients in relativistic
atomic structure for any scalar one- and two-particle operator is presented.
The program, written in Fortran 90/95 and based on techniques of second
quantization, irreducible tensorial operators, quasispin and the theory of
angular momentum, is intended to replace existing angular coefficient modules
from GRASP92. The new module uses a different decomposition of the coefficients
as sums of products of pure angular momentum coefficients, which depend only on
the tensor rank of the interaction but not on its details, with effective
interaction strengths of specific interactions. This saves memory and reduces
the computational cost of big calculations signficantly
Towards Large-scale Inconsistency Measurement
We investigate the problem of inconsistency measurement on large knowledge
bases by considering stream-based inconsistency measurement, i.e., we
investigate inconsistency measures that cannot consider a knowledge base as a
whole but process it within a stream. For that, we present, first, a novel
inconsistency measure that is apt to be applied to the streaming case and,
second, stream-based approximations for the new and some existing inconsistency
measures. We conduct an extensive empirical analysis on the behavior of these
inconsistency measures on large knowledge bases, in terms of runtime, accuracy,
and scalability. We conclude that for two of these measures, the approximation
of the new inconsistency measure and an approximation of the contension
inconsistency measure, large-scale inconsistency measurement is feasible.Comment: International Workshop on Reactive Concepts in Knowledge
Representation (ReactKnow 2014), co-located with the 21st European Conference
on Artificial Intelligence (ECAI 2014). Proceedings of the International
Workshop on Reactive Concepts in Knowledge Representation (ReactKnow 2014),
pages 63-70, technical report, ISSN 1430-3701, Leipzig University, 2014.
http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-15056
Putting research first? Perspectives from academics and students on first-year undergraduates learning research
Exploring the place and potential of ‘research’ in undergraduate degrees has stimulated higher-educational debate for decades, strongly influencing policies, practices and structures. This article’s consideration of some problems associated with teaching and learning about research during the first year of undergraduate degrees, helps throw that debate into a sharper light. Should first-year undergraduates be asked to learn from their own or others’ research, and what difficulties might they experience? What relevant previous learning about research, or lack of it, might they bring with them into their degree? Working with empirical data from across one English university, and literature from universities across the world, these questions are discussed by exploring first-year undergraduate teaching and learning, through the lenses of critical inquiry and constructivist grounded theory.Peer reviewedFinal Published versio
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