It is well known that the compatible linear and quadratic Poisson brackets of the full symmetric and of the standard open Toda lattices are restrictions of linear and quadratic
r
-matrix Poisson ...brackets on the associative algebra
gl
(
n
,
R
)
. We here show that the quadratic bracket on
gl
(
n
,
R
)
, corresponding to the
r
-matrix defined by the splitting of
gl
(
n
,
R
)
into the direct sum of the upper triangular and orthogonal Lie subalgebras, descends by Poisson reduction from a quadratic Poisson structure on the cotangent bundle
T
∗
GL
(
n
,
R
)
. This complements the interpretation of the linear
r
-matrix bracket as a reduction of the canonical Poisson bracket of the cotangent bundle.
We report here the first successful synthesis of cold antihydrogen atoms employing a cusp trap, which consists of a superconducting anti-Helmholtz coil and a stack of multiple ring electrodes. This ...success opens a new path to make a stringent test of the CPT symmetry via high precision microwave spectroscopy of ground-state hyperfine transitions of antihydrogen atoms.
In painful epicondylitis, previous studies reported deficiencies in elbow proprioception. In line, proprioceptive training of the lower limb has been reported substantial beneficial in a number of ...indications. Therefore, we have asked if a specified proprioceptive training using training devices that are capable of activating the deep musculature in the upper limb is able to reduce the symptoms of epicondylitis.
We included 71 patients with painful lateral epicondylitis > 3 months.
Group A: Proprioceptive training intervention with a Flexibar® (9 min daily for 12 weeks). Group B: at least 40 min running or walking/week with the XCO® in addition to the proprioceptive training with the Flexibar® (9 min daily for 12 weeks), follow-up for 12 weeks. Primary end point: Pain on visual analogue scale (VAS, 0-10); secondary end points: DASH-Score (0 = very good, 100 = very poor), grip strength according to Jamar dynamometer (kg), vibration sensation measured with a 128 Hz tuning fork.
The pain on VAS in group A was reduced significantly. 3.6 ± 2.0 to 2.4 ± 2.1 (-33%, p = 0.013), and from 3.7 ± 2.4 to 2.2 ± 1.9 (-41%, p = 0.004) in group B after 12 weeks. There was no significant difference between A and B (p = 0.899). In both groups, there was a significant improvement of the DASH-Score (A: 32 ± 15 to 14 ± 12, -56%, p < 0.001; B: 27 ± 12 to 12 ± 11, -55%, p = 0.001) without any difference between groups A and B (p = 0.339). Grip strength improvement in group A from 24 ± 12 to 33 ± 11 kg (+38%, p < 0.001), and from 29 ± 14 to 34 ± 11 kg (+15%, p < 0.001) in group B. In line, vibration sensation improved in both groups (A: 6.3 ± 0.6 to 6.5 ± 0.5, p = 0.0001; B: 6.3 ± 0.7 to 6.6 ± 0.5, p = 0.003).
A 12-week proprioceptive training with the Flexibar® improves pain, quality of life, grip strength and vibration sensation in patients with painful lateral epicondylitis.
Ib, randomised clinical trial TRIAL REGISTRATION: German Clinical Trials Register, DRKS00024857 , registered on 25 March 2021-retrospectively registered, http://apps.who.int/trialsearch/.
In the present paper the development and application of a novel melanin concentrating hormone radioimmunoassay and receptor-binding assay are described.
125
I-labeling of melanin concentrating ...hormone (MCH) was performed by iodogen and the mono-iodinated peptide was separated by reversed-phase high performance liquid chromatography. Detection limit of the MCH specific assay was 0.2 fmol/ml. As a practical application of the novel radioimmunoassay, we measured the MCH concentration in different rat organs. High MCH concentrations were detected in the small intestine, pancreas, kidney, liver, trachea, hypothalamus and spinal cord.
125
I-MCH was also suitable for RBA to demonstrate the presence of MCH receptors in the rat brain.
We created a simulation model to investigate the characteristics of fluorescence in two-photon-excited samples. In the model, the sample is a diffusible solution of fluorophore molecules, which is ...divided into cubic cells and illuminated by a train of focused laser pulses described as a Gaussian beam. Simulating the state transitions according to a multilevel photodynamic model (also including photobleaching and intersystem crossing), the simulator provides the expected number and the spatial distribution of emitted photons over time. Our simulations demonstrated how the illumination laser power, diffusion, and the photodynamic parameters of the fluorophore affect fluorescence. We revealed the unusual fluorescent profile that evolves as photobleaching progresses: the most photons are not emitted from the focus (where a "dark hole" appears) but from an ellipsoid around the focus. The model could be adapted to several fluorescent techniques (such as two-photon microscopy and fluorescence recovery after photobleaching). Furthermore, it might help to optimize the operating parameters of the measurement devices (e.g., in order to reach higher image quality and lower photobleaching).
Abstract
It is well known that the compatible linear and quadratic Poisson brackets of the full symmetric and of the standard open Toda lattices are restrictions of linear and quadratic
r
-matrix ...Poisson brackets on the associative algebra
$$\mathrm {gl}(n,{\mathbb {R}})$$
gl
(
n
,
R
)
. We here show that the quadratic bracket on
$$\mathrm {gl}(n,{\mathbb {R}})$$
gl
(
n
,
R
)
, corresponding to the
r
-matrix defined by the splitting of
$$\mathrm {gl}(n,{\mathbb {R}})$$
gl
(
n
,
R
)
into the direct sum of the upper triangular and orthogonal Lie subalgebras, descends by Poisson reduction from a quadratic Poisson structure on the cotangent bundle
$$T^* \mathrm {GL}(n,{\mathbb {R}})$$
T
∗
GL
(
n
,
R
)
. This complements the interpretation of the linear
r
-matrix bracket as a reduction of the canonical Poisson bracket of the cotangent bundle.
The ASACUSA collaboration at the Antiproton Decelerator at CERN is planning to measure the hyperfine splitting of the ground state of antihydrogen using an atomic beam line. This will be a ...measurement of the antiproton magnetic moment, and also a test of the CPT invariance. The planned experimental method and setup, including the radiofrequency resonance cavity, are described, and results of Monte Carlo simulations are shown. These simulations predict that the antihydrogen ground-state hyperfine splitting can be determined with a relative precision of ∼10
− 7
.
Celotno besedilo
Dostopno za:
DOBA, EMUNI, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SBMB, SBNM, UILJ, UKNU, UL, UM, UPUK
Six laser-resonant transitions have been detected in metastable antiprotonic helium atoms produced at the CERN Antiproton Decelerator. They include UV transitions from the last metastable states in ...the v = n-l-1 = 0 and 1 cascades. Zero-density frequencies were obtained from measured pressure shifts with fractional precisions between 1.3 x 10(-7) and 1.6 x 10(-6). By comparing these with QED calculations and the antiproton cyclotron frequency, we deduce that the antiproton and proton charges and masses agree to within 6 x 10(-8) with a confidence level of 90%.
The ASACUSA collaboration at the Antiproton Decelerator of CERN is planning to measure the ground-state hyperfine splitting of antihydrogen using an atomic beam line, consisting of a cusp trap as a ...source of partially polarized antihydrogen atoms, a radiofrequency spin-flip cavity, a superconducting sextupole magnet as spin analyser, and an antihydrogen detector. This will be a measurement of the antiproton magnetic moment, and also a test of the CPT invariance. Monte Carlo simulations predict that the antihydrogen ground-state hyperfine splitting can be determined with a relative precision of ∼10−7. The first preliminary measurements of the hyperfine transitions will start in 2011.
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