9,196 research outputs found
Weight change and quality of life in a community-based population
*Objectives:* This study investigates the longitudinal association between 5-year weight change and quality of life (QoL) in Dutch men and women.

*Design:* A prospective cohort study (1998, 2000, 2003) in a population based sample. Subjects: 2,414 men and women from the Maastricht region of the Netherlands.

*Measurements:* QoL outcomes were measured by the RAND-36 (eight subscales and two overall composite scores, physical and mental health (PCS and MCS)). Weight was measured on a scale. Weight change was calculated as change in weight between 1998 and 2003. In addition, 5-year weight change was also categorized in three groups: weight losers, weight maintainers, and weight gainers. All analyses were stratified for gender.

*Results:* A total of 598 men (50%) and 646 women (54%) maintained their weight, 177 men (15%) and 163 women (14%) lost more than 2.5 kg, and 410 men (35%) and 379 women (32%) gained more than 2.5 kg. Associations between 5-year weight change and QoL were found for MCS ([beta] = 0.13, 95% CI: 0.02|0.24) in women, and PCS ([beta] = -0.09, 95% CI: -0.17|-0.00; [beta] = -0.10, 95% CI: -0.19|-0.01) in men and women respectively. Moreover, associations between weight change and QoL were most pronounced for women of normal weight and obese men. Furthermore, in both genders, weight gainers showed a greater reduction on all physical components of QoL compared with weight maintainers. However, after 5-years weight gainers and weight losers did not significantly differ from weight maintainers in the mean change of MCS and PCS.

*Conclusion:* Weight gain was inversely associated with the physical domains of QoL in women and obese men. Conversely, in women, weight gain was positively associated with the mental domains of QoL. No differences between weight losers and weight gainers were found in mean change of QoL compared with weight maintainers
Paleomagnetism in speleothems: influence of calcite growth dip on the natural remanent magnetization
Recent studies recognized speleothems as excellent recorders of the Earth’s magnetic field. However, some
questions remain about the origin of the natural remanent magnetization and about the influence of the speleothem shape on the recorded magnetic directions.info:eu-repo/semantics/publishedVersio
Speleothem shape and natural remanent magnetization
Speleothems might be of interest for high-resolution reconstruction of the Earth’s magnetic field. However, little
is known about the influence of speleothem morphologies on their Natural Remanent Magnetization (NRM).info:eu-repo/semantics/publishedVersio
Facet ridge end points in crystal shapes
Equilibrium crystal shapes (ECS) near facet ridge end points (FRE) are
generically complex. We study the body-centered solid-on-solid model on a
square lattice with an enhanced uniaxial interaction range to test the
stability of the so-called stochastic FRE point where the model maps exactly
onto one dimensional Kardar-Parisi-Zhang type growth and the local ECS is
simple. The latter is unstable. The generic ECS contains first-order ridges
extending into the rounded part of the ECS, where two rough orientations
coexist and first-order faceted to rough boundaries terminating in
Pokrovsky-Talapov type end points.Comment: Contains 4 pages, 5 eps figures. Uses RevTe
Experimental Evidence for Quantum Interference and Vibrationally Induced Decoherence in Single-Molecule Junctions
We analyze quantum interference and decoherence effects in single-molecule
junctions both experimentally and theoretically by means of the mechanically
controlled break junction technique and density-functional theory. We consider
the case where interference is provided by overlapping quasi-degenerate states.
Decoherence mechanisms arising from the electronic-vibrational coupling
strongly affect the electrical current flowing through a single-molecule
contact and can be controlled by temperature variation. Our findings underline
the all-important relevance of vibrations for understanding charge transport
through molecular junctions.Comment: 5 pages, 4 figure
Nonlocal signaling in the configuration space model of quantum-classical interactions
When interactions are turned off, the theory of interacting quantum and
classical ensembles due to Hall and Reginatto is shown to suffer from a
nonlocal signaling effect that is effectively action at a distance. This limits
the possible applicability of the theory. In its present form, it is restricted
to those situations in which interactions are always on, such as classical
gravity interacting with quantized matter.Comment: 3 pages, no figure
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