407 research outputs found
Association of Painful musculoskeletal conditions and migraine headache with mental and sleep disorders among adults with disabilities, Spain, 2007-2008.
Introduction: The aim of the study was to determine the prevalence of musculoskeletal painful conditions and migraine/headache in a population with disabilities, and their association with anxiety, depression and sleep disorders.
Methods: This cross-sectional study analyzed data from the Spanish Disability-Dependence Survey on 16932 subjects â„18 years-of-age that suffer disabilities. The prevalence (CI 95%) of musculoskeletal painful conditions was considered through the diagnosis of arthritis, osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, muscular dystrophy and neck or back pain. The prevalence of migraine/headache was also calculated. Factors associated to these painful conditions were analyzed separately for each sex using a logistic regression model.
Results: The prevalence of musculoskeletal painful conditions was 66.9% (CI 95%: 66.2-67.6) and that of migraine/headache was 23.4% (CI95%:22.8-24.1), both of which were higher in women than in men. Factors associated to these painful conditions in both men and women included increased age, sleeping less than 6 hours, and concomitant chronic anxiety and/or depression.
Conclusion: The prevalence of musculoskeletal painful conditions and migraine/headache is high in individuals with disability in Spain, especially in women, and these conditions often coexist with depression, anxiety and/or sleep disturbances. Our findings suggest that mental and/or sleep disorders should be considered alongside conventional treatments in subjects with disability and specific painful conditions in order to design effective programs to rehabilitate them and improve their quality of life
The muon g-2 in a SU(7) left-right symmetric model with mirror fermions
We have studied a left-right symmetric model with mirror fermions based in a
grand unified SU(7) model in order to account for the muon anomaly. The Higgs
sector of the model contains two Higgs doublets and the hierarchy condition
can be achieved by using two additional Higgs
singlets, one even and other odd under
-parity. We show that there is a wide range of values for the
mass parameters of the model that is consistent with the lepton
anomalies.
Radiative correction to the mass of the ordinary fermions are shown to be
small
Weak Magnetic Dipole Moments in the MSSM
We calculate the weak magnetic dipole moment of different fermions in the
MSSM. In particular, we consider in detail the predictions for the WMDM of the
tau lepton and bottom quark. We compare the purely SUSY contributions with two
Higss doublet models and SM predictions. For the tau lepton, we show that
chargino diagrams give the main SUSY contribution, which for tan beta=50 can be
one order of magnitude bigger than the SM prediction. For the b quark, gluino
diagrams provide the main SUSY contribution to its weak anomalous dipole
moment, which is still dominated by gluon contributions. We also study how the
universality assumption in the slepton sector induces correlations between the
SUSY contributions to the tau WMDM and to (g-2) of the muon.Comment: 17 pages, LaTex, uses psfig.sty with 6 figure
Dark Force Detection in Low Energy e-p Collisions
We study the prospects for detecting a light boson X with mass m_X < 100 MeV
at a low energy electron-proton collider. We focus on the case where X
dominantly decays to e+ e- as motivated by recent "dark force" models. In order
to evade direct and indirect constraints, X must have small couplings to the
standard model (alpha_X 10 MeV).
By comparing the signal and background cross sections for the e- p e+ e- final
state, we conclude that dark force detection requires an integrated luminosity
of around 1 inverse attobarn, achievable with a forthcoming JLab proposal.Comment: 38 pages, 19 figures; v2, references adde
Constraints from muon g-2 and LFV processes in the Higgs Triplet Model
Constraints from the muon anomalous magnetic dipole moment and lepton flavor
violating processes are translated into lower bounds on v_Delta*m_H++ in the
Higgs Triplet Model by considering correlations through the neutrino mass
matrix. The discrepancy of the sign of the contribution to the muon anomalous
magnetic dipole moment between the measurement and the prediction in the model
is clarified. It is shown that mu to e gamma, tau decays (especially, tau to mu
e e), and the muonium conversion can give a more stringent bound on
v_Delta*m_H++ than the bound from mu to eee which is expected naively to give
the most stringent one.Comment: 18 pages, 16 figure
Associated Charm Production in Neutrino-Nucleus Interactions
In this paper a search for associated charm production both in neutral and
charged current -nucleus interactions is presented. The improvement of
automatic scanning systems in the {CHORUS} experiment allows an efficient
search to be performed in emulsion for short-lived particles. Hence a search
for rare processes, like the associated charm production, becomes possible
through the observation of the double charm-decay topology with a very low
background. About 130,000 interactions located in the emulsion target
have been analysed. Three events with two charm decays have been observed in
the neutral-current sample with an estimated background of 0.180.05. The
relative rate of the associated charm cross-section in deep inelastic
interactions, has been
measured. One event with two charm decays has been observed in charged-current
interactions with an estimated background of 0.180.06 and the
upper limit on associated charm production in charged-current interactions at
90% C.L. has been found to be .Comment: 10 pages, 4 figure
The Muon Anomalous Magnetic Moment: A Harbinger For "New Physics"
QED, Hadronic, and Electroweak Standard Model contributions to the muon
anomalous magnetic moment, a_mu = (g_mu-2)/2, and their theoretical
uncertainties are scrutinized. The status and implications of the recently
reported 2.6 sigma experiment vs.theory deviation a_mu^{exp}-a_mu^{SM} =
426(165) times 10^{-11} are discussed. Possible explanations due to
supersymmetric loop effects with m_{SUSY} \simeq 55 sqrt{tan beta} GeV,
radiative mass mechanisms at the 1--2 TeV scale and other ``New Physics''
scenarios are examined.Comment: 24 page
The influence of synaptic activity on neuronal health
According to the theory of neuronal health, neurons exist in a spectrum of states ranging from highly resilient to vulnerable. An unhealthy neuron may be rendered dysfunctional or non-viable by an insult that would ordinarily be non-toxic to a healthy neuron. Over the years it has become clear that a neuronâs health is subject to dynamic regulation by electrical or synaptic activity. This review highlights recently identified activity dependent signalling events which boost neuronal health through the transcriptional control of pro- and anti-apoptotic genes, the enhancement of antioxidant defences, and the regulation of mitochondrial and neurotrophic factor availability. Furthermore, activity dependent signals have recently been shown to influence a variety of events specific to individual neurodegenerative diseases, which will also be highlighted
Gender differences in health of EU10 and EU15 populations: the double burden of EU10 men
This study compares gender differences in Healthy Life Years (HLY) and unhealthy life years (ULY) between the original (EU15) and new member states (EU10). Based on the number of deaths, population and prevalence of activity limitations from the Statistics of Living and Income Conditions Survey (SILC) survey, we calculated HLY and ULY for the EU10 and EU15 in 2006 with the Sullivan method. We used decomposition analysis to assess the contributions of mortality and disability and age to gender differences in HLY and ULY. HLY at age 15 for women in the EU10 were 3.1Â years more than those for men at the same age, whereas HLY did not differ by gender in the EU15. In both populations ULY at age 15 for women exceeded those for men by 5.5Â years. Decomposition showed that EU10 women had more HLY because higher disability in women only partially offset (â0.8Â years) the effect of lower mortality (+3.9Â years). In the EU15 womenâs higher disability prevalence almost completely offset womenâs lower mortality. The 5.3 fewer ULY in EU10 men than in EU10 women mainly reflected higher male mortality (4.5Â years), while the fewer ULY in EU15 men than in EU15 women reflected both higher male mortality (2.9Â years) and higher female disability (2.6Â years). The absence of a clear gender gap in HLY in the EU15 thus masked important gender differences in mortality and disability. The similar size of the gender gap in ULY in the EU-10 and EU-15 masked the more unfavourable health situation of EU10 men, in particular the much stronger and younger mortality disadvantage in combination with the virtually absent disability advantage below age 65 in men
Controlled production of atomic oxygen and nitrogen in a pulsed radio-frequency atmospheric-pressure plasma
International audienceRadio-frequency driven atmospheric pressure plasmas are efficient sources for the production of reactive species at ambient pressure and close to room temperature. Pulsing the radio-frequency power input provides additional control over species production and gas temperature. Here, we demonstrate the controlled production of highly reactive atomic oxygen and nitrogen in a pulsed radio-frequency ( ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn001.gif] 13.56 MHz) atmospheric-pressure plasma, operated with a small ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn002.gif] 0.1 % air-like admixture ( ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn003.gif] \rm N_2 / ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn004.gif] \rm O_2 at ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn005.gif] 4:1 ) through variations in the duty cycle. Absolute densities of atomic oxygen and nitrogen are determined through vacuum-ultraviolet absorption spectroscopy using the DESIRS beamline at the SOLEIL synchrotron coupled with a high resolution Fourier-transform spectrometer. The neutral-gas temperature is measured using nitrogen molecular optical emission spectroscopy. For a fixed applied-voltage amplitude (234?V), varying the pulse duty cycle from 10% to 100% at a fixed 10?kHz pulse frequency enables us to regulate the densities of atomic oxygen and nitrogen over the ranges of ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn006.gif] (0.18±0.03) ? ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn007.gif] (3.7±0.1)à 10^20 ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn008.gif] \rm m^-3 and ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn009.gif] (0.2±0.06) ? ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn010.gif] (4.4±0.8) à 10^19 ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn011.gif] \rm m^-3 , respectively. The corresponding 11?K increase in the neutral-gas temperature with increased duty cycle, up to a maximum of ##IMG## [http://ej.iop.org/images/0022-3727/50/45/455204/daa8da2ieqn012.gif] (314±4) K, is relatively small. This additional degree of control, achieved through regulation of the pulse duty cycle and time-averaged power, could be of particular interest for prospective biomedical applications
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