7 research outputs found

    A STUDY OF MUSCLE FATIGUE FOR PROLONGED STANDING USING SURFACE ELECTROMYOGRAM: A CASE STUDY

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    The purpose of this study is to use surface Electromyogram (sEMG) for the investigation of muscle activities in the lower limbs of human subjects during prolonged standing. It has been suggested that prolonged standing leads to muscle fatigue. This is a single-subject investigation that involves a healthy female subject, performing 8 similar quiet standing trials for one hour on separate days. sEMG methods were used to record myoelectric activity from the Tibialis Anterior (TA), Peroneus Longus (PE) and Gastrocnemius muscles (GA). In the preliminary analysis, a progressive decrease in the median frequency curve has been observed in all muscle groups investigated and the trend was statistically significant (p < 0.05). The results of this study confirmed that muscle fatigue sets in during prolonged standing

    Branching fraction and CP asymmetries of B0→KS0KS0KS0

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    We present measurements of the branching fraction and time-dependent CP-violating asymmetries in B0→K0SK0SK0S decays based on 227×106 Υ(4S)→BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We obtain a branching fraction of (6.9+0.9−0.8±0.6)×10−6, and CP asymmetries C=−0.34+0.28−0.25±0.05 and S=−0.71+0.38−0.32±0.04, where the first uncertainties are statistical and the second systematic

    Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B)→p+p- decays

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    We present results from an analysis of B0(B¯¯¯0)→ρ+ρ− using 232×106 Υ(4S)→BB¯¯¯ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction fL=0.978±0.014(stat)+0.021−0.029(syst) and the CP-violating parameters SL=−0.33±0.24(stat)+0.08−0.14(syst) and CL=−0.03±0.18(stat)±0.09(syst). Using an isospin analysis of B→ρρ decays, we determine the unitarity triangle parameter α. The solution compatible with the standard model is α=(100±13)°

    Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle α Using B0(B¯)→ρ+ρ- Decays

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    We present results from an analysis of B0(B̅ 0)→ρ+ρ- using 232×106 Υ(4S)→BB̅ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction fL=0.978±0.014(stat)+0.021/-0.029(syst) and the CP-violating parameters SL=-0.33±0.24(stat)+0.08/-0.14(syst) and CL=-0.03±0.18(stat)±0.09(syst). Using an isospin analysis of B→ρρ decays, we determine the unitarity triangle parameter α. The solution compatible with the standard model is α=(100±13)°

    Search for strange-pentaquark production in e+e− annihilation at √s=10.58 GeV

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    We search for strange pentaquark states that have been previously reported by other experiments -- the Θ(1540)+, Ξ5(1860)−−, and Ξ5(1860)0 -- in 123 fb−1 of data recorded with the BaBar detector at the PEP-II e+e− storage ring. We find no evidence for these states and set 95% confidence level upper limits on the number of Θ(1540)+ and Ξ5(1860)−− pentaquarks produced per e+e− annihilation event that are about eight and four times lower than the rates measured for ordinary baryons of similar mass

    Measurements of branching fractions and time-dependent CP-violating asymmetries in B→η'K decays

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    We present measurements of the B -> eta' K branching fractions:for B+ -> eta' K+ we measure also the time-integrated charge asymmetry Ach, and for B0 -> eta' K0S the time dependent CP-violation parameters S and C. The data sample corresponds to 232 million B Bbar pairs produced by e+ e- annihilation at the Upsilon(4S). The results are BF(B+ -> eta' K+) = (68.9 +- 2.0 +- 3.2) * 10^-6, BF(B0 -> eta' K0) = (67.4 +- 3.3 +- 3.2) * 10^-6, Ach = 0.033 +- 0.028 +- 0.005, S=0.30 +- 0.14 +- 0.02, C=-0.21 +- 0.10 +- 0.02, where the first error is statistical and the second systematic

    Measurement of branching fractions and charge asymmetries for exclusive B decays to charmonium

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    We report measurements of branching fractions and charge asymmetries of exclusive decays of neutral and charged B mesons into two-body final states containing a charmonium state and a light strange meson. The charmonium mesons considered are J/ψ, ψ(2S) and χc1, and the light meson is either K or K∗. We use a sample of about 124×106 BB¯¯¯ pairs collected with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center
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