621 research outputs found
Aktive MobilitĂ€t und Gesundheit : Hintergrundbericht fĂŒr den nationalen Gesundheitsbericht 2015
Zu Fuss gehen und Velofahren tragen viel zu einer gesundheitsfördernden Bewegung bei.
Die vielfĂ€ltigen positiven Gesundheitseffekte regelmĂ€ssiger Bewegung sind heute umfassend belegt. Ob in der Freizeit oder im Alltag, zu Fuss gehen und Velofahren - so genannte aktive MobilitĂ€t - können viel zu einer gesundheitsfördernden Bewegung beitragen. Zahlreiche Faktoren beeinflussen indessen die Neigung, zu Fuss zu gehen oder mit dem Velo zu fahren, darunter Wegeigenschaften, Alter, Fitness, aber auch Verkehrssicherheit und ganz allgemein die Merkmale von Quartieren und StĂ€dten. Die verĂ€nderbaren strukturellen Faktoren, insbesondere die Verkehrsinfrastruktur und -Sicherheit stehen im Zentrum zeitgemĂ€sser Förderung der aktiven MobilitĂ€t. Aus Sicht der Gesundheitspolitik ist eine intersektorielle Zusammenarbeit zwischen Gesundheitssektor und Verkehrs- und StĂ€dteplanung erstrebenswert. Bei den Ăberlegungen werden dadurch auch Gesundheitsfolgen fokussiert
Conseil-santé dans la médecine de premier recours, partie 2
Les maladies non transmissibles (MNT, en anglais «non-communicable diseases») ont gagné du terrain dans le monde entier. Les approches de conseil fourni au cabinet médical ont déjà été présentées dans un premier article. Le présent article se
consacre aux conditions permettant Ă ces approches de dĂ©ployer leur efficacitĂ© au niveau de la population. Ceci est illustrĂ© sur la base des programmes suisses actuels «Vivre sans tabac», PAPRICA et «Coaching Santé» ainsi que de lâexemple historique «Ăa dĂ©bouche sur quoi?»
Ω-Arithmetization of Ellipses
International audienceMulti-resolution analysis and numerical precision problems are very important subjects in fields like image analysis or geometrical modeling. In the continuation of our previous works, we propose to apply the method of Ω-arithmetization to ellipses. We obtain a discrete multi-resolution representation of arcs of ellipses. The corresponding algorithms are completely constructive and thus, can be exactly translated into functional computer programs. Moreover, we give a global condition for the connectivity of the discrete curves generated by the method at every scale
Early (and Later) LHC Search Strategies for Broad Dimuon Resonances
Resonance searches generally focus on narrow states that would produce a
sharp peak rising over background. Early LHC running will, however, be
sensitive primarily to broad resonances. In this paper we demonstrate that
statistical methods should suffice to find broad resonances and distinguish
them from both background and contact interactions over a large range of
previously unexplored parameter space. We furthermore introduce an angular
measure we call ellipticity, which measures how forward (or backward) the muon
is in eta, and allows for discrimination between models with different parity
violation early in the LHC running. We contrast this with existing angular
observables and demonstrate that ellipticity is superior for discrimination
based on parity violation, while others are better at spin determination.Comment: 31 pages, 19 figures. References added, minor modifications made to
section
Distinguishing among Technicolor/Warped Scenarios in Dileptons
Models of dynamical electroweak symmetry breaking usually include new spin-1
resonances, whose couplings and masses have to satisfy electroweak precision
tests. We propose to use dilepton searches to probe the underlying structure
responsible for satisfying these. Using the invariant mass spectrum and charge
asymmetry, we can determine the number, parity, and isospin of these
resonances. We pick three models of strong/warped symmetry breaking, and show
that each model produces specific features that reflect this underlying
structure of electroweak symmetry breaking and cancellations.Comment: Added missing referenc
Physical activity and quality of life in community dwelling older adults
<p>Abstract</p> <p>Background</p> <p>Physical activity has been consistently associated with enhanced quality of life (QOL) in older adults. However, the nature of this relationship is not fully understood. In this study of community dwelling older adults, we examined the proposition that physical activity influences global QOL through self-efficacy and health-status.</p> <p>Methods</p> <p>Participants (N = 321, <it>M </it>age = 63.8) completed measures of physical activity, self-efficacy, global QOL, physical self worth, and disability limitations. Data were analyzed using covariance modeling to test the fit of the hypothesized model.</p> <p>Results</p> <p>Analyses indicated direct effects of a latent physical activity variable on self-efficacy but not disability limitations or physical self-worth; direct effects of self-efficacy on disability limitations and physical self worth but not QOL; and direct effects of disability limitations and physical self-worth on QOL.</p> <p>Conclusion</p> <p>Our findings support the role of self-efficacy in the relationship between physical activity and QOL as well as an expanded QOL model including both health status indicators and global QOL. These findings further suggest future PA promotion programs should include strategies to enhance self-efficacy, a modifiable factor for improving QOL in this population.</p
Numerical loop quantum cosmology: an overview
A brief review of various numerical techniques used in loop quantum cosmology
and results is presented. These include the way extensive numerical simulations
shed insights on the resolution of classical singularities, resulting in the
key prediction of the bounce at the Planck scale in different models, and the
numerical methods used to analyze the properties of the quantum difference
operator and the von Neumann stability issues. Using the quantization of a
massless scalar field in an isotropic spacetime as a template, an attempt is
made to highlight the complementarity of different methods to gain
understanding of the new physics emerging from the quantum theory. Open
directions which need to be explored with more refined numerical methods are
discussed.Comment: 33 Pages, 4 figures. Invited contribution to appear in Classical and
Quantum Gravity special issue on Non-Astrophysical Numerical Relativit
Manin matrices and Talalaev's formula
We study special class of matrices with noncommutative entries and
demonstrate their various applications in integrable systems theory. They
appeared in Yu. Manin's works in 87-92 as linear homomorphisms between
polynomial rings; more explicitly they read: 1) elements in the same column
commute; 2) commutators of the cross terms are equal: (e.g. ). We claim
that such matrices behave almost as well as matrices with commutative elements.
Namely theorems of linear algebra (e.g., a natural definition of the
determinant, the Cayley-Hamilton theorem, the Newton identities and so on and
so forth) holds true for them.
On the other hand, we remark that such matrices are somewhat ubiquitous in
the theory of quantum integrability. For instance, Manin matrices (and their
q-analogs) include matrices satisfying the Yang-Baxter relation "RTT=TTR" and
the so--called Cartier-Foata matrices. Also, they enter Talalaev's
hep-th/0404153 remarkable formulas: ,
det(1-e^{-\p}T_{Yangian}(z)) for the "quantum spectral curve", etc. We show
that theorems of linear algebra, after being established for such matrices,
have various applications to quantum integrable systems and Lie algebras, e.g
in the construction of new generators in (and, in general,
in the construction of quantum conservation laws), in the
Knizhnik-Zamolodchikov equation, and in the problem of Wick ordering. We also
discuss applications to the separation of variables problem, new Capelli
identities and the Langlands correspondence.Comment: 40 pages, V2: exposition reorganized, some proofs added, misprints
e.g. in Newton id-s fixed, normal ordering convention turned to standard one,
refs. adde
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