[en] This paper reports MR imaging used to evaluate cartilage abnormalities in three dogs in which the anterior cruciate ligament (ACL) of one hind limb had been transected to produce osteoarthritis. In this model changes mirror those in human osteoarthritis, but they are not progressive after a few months. The authors performed serial plain radiography and MR imaging of the osteoarthritic knee and control knee 3 years after ACL transection. Coronal T1- weighted images and sagittal multiecho and field echo summed images were obtained. Radiographs showed osteophytes, geodes, and subchondral sclerosis of the operated knees, with no progression between 2 and 3 years. Contralateral knees were normal. On MR images in each case there was indistinctness and thickening of articular cartilage in the abnormal knee compared with the contralateral knee

[en] In a rotating He II-filled cylinder with an aspect ratio of 4.3 the transient evolution of the vorticity fields of the normal fluid and the superfluid component during spin-up are investigated. The acoustical method of measurements used utilizes the change of propagation time of first- and second-sound signals irradiated through a slit in the middle of the cylinder. The results of the first-sound measurements within the range 1.3 ≤ T ≤ 2.1 K essentially do not depend on temperature and, for the final state, indicate a lack of about 30% of vorticity compared to solid-body rotation. On the other hand, the results of the second-sound measurements are temperature-dependent and show that the superfluid component reaches solid-body rotation, while the normal fluid fraction seems to slip at the wall. Accordingly, the velocity in the inner part of the flow field adopts a value lower than one would expect from the present velocity of the wall, thus confirming the lack of vorticity observed

[en] The analysis of quality and applicability of the 'Allgemeine Berechnungsgrundlagen' (models and standards for dose calculation) presented in this report covers two parts. The first is an analysis of the theoretical model and the requirements to be met by parameters, and of the quantitative significance of parameters, nuclides, and pathways with regard to the final result, the calculated dose. In the second part, the nuclides Sr-90 and Cs-137 are taken as an example to show for the case of activity ingestion via the terrestrial food chains, whether there are deviations of results obtained according to the 'Allgemeine Berechnungsgrundlagen' on the one hand from those obtained by calculations taking into account current knowledge of the radionuclide migration and behaviour in the environment. (orig./PW)

[en] 50 children with urinary-tract infection and vesicoureteric reflux were investigated by direct radionuclide cystography (R.N.C.). Recent micturating cystourethrograms (M.C.U.) were used as controls. In 37 patients the results of both tests corresponded, 9 patients were M.C.U. positive only, and 4 were R.N.C. positive only. R.N.C. is associated with a considerably lower radiation dose than M.C.U.s and intravenous urograms, it provides an accurate measurement of residual urine, and is simple to apply with equipment which is readily available. R.N.C. is a useful investigation in the diagnosis and management of reflux and a valuable complement to standard radiographic methods. (author)

No abstract available

[en] Using 5.9 pb⁻¹ of $e^{+}{e}^{-}$ annihilation data collected at center-of-mass energies from 3.640 to 3.701 GeV with the BESIII detector at the BEPCII Collider, we measure the observed cross sections of $e^{+}{e}^{-}\to K_S^{0}X$ (where $X=\text{anything}$). From a fit to these observed cross sections with the sum of continuum and $\psi (3686)$ and $J/\psi$ Breit-Wigner functions and considering initial state radiation and the BEPCII beam energy spread, we obtain for the first time the product of $\psi (3686)$ leptonic width and inclusive decay branching fraction ${\mathrm{\Gamma }}_{\psi (3686)}^{ee}\mathcal{B}(\psi (3686)\to K_S^{0}X)=(373.8\pm 6.7\pm 20.0)$ eV, and assuming ${\mathrm{\Gamma }}_{\psi (3686)}^{ee}$ is $(2.33\pm 0.04)$ keV from PDG value, we measure $\mathcal{B}(\psi (3686)\to K_S^{0}X)=(16.04\pm 0.29\pm 0.90)\text{\%}$, where the first uncertainty is statistical and the second is systematic.

[en] Born cross sections for the processes $e^{+}{e}^{-}\to \omega \eta$ and $e^{+}{e}^{-}\to \omega {\pi }^0$ have been determined for center-of-mass energies between 2.00 and 3.08 GeV with the BESIII detector at the BEPCII collider. The results obtained in this work are consistent with previous measurements but with improved precision. Two resonant structures are observed. In the $e^{+}{e}^{-}\to \omega \eta$ cross sections, a resonance with a mass of $(2176\pm 24\pm 3)\text{MeV}/c^2$ and a width of $(89\pm 50\pm 5)\text{MeV}$ is observed with a significance of 6.2σ. Its properties are consistent with the $\varphi (2170)$. In the $e^{+}{e}^{-}\to \omega {\pi }^0$ cross sections, a resonance denoted $Y(2040)$ is observed with a significance of more than 10σ. Its mass and width are determined to be $(2034\pm 13\pm 9)\text{MeV}/c^2$ and $(234\pm 30\pm 25)\text{MeV}$, respectively, where the first uncertainties are statistical and the second ones are systematic.

[en] The electromagnetic process $e^{+}{e}^{-}\to p\overline{p}$ is studied with the initial-state-radiation technique using 7.5 fb⁻¹ of data collected by the BESIII experiment at seven energy points from 3.773 to 4.600 GeV. The Born cross section and the effective form factor of the proton are measured from the production threshold to 3.0 GeV/$c^2$ using the $p\overline{p}$ invariant-mass spectrum. The ratio of electric and magnetic form factors of the proton is determined from the analysis of the proton-helicity angular distribution.

No abstract available

[en] The Born cross sections of the $e^{+}{e}^{-}\to {\mathrm{\Sigma }}^{+}{\overline{\mathrm{\Sigma }}}^{-}$ and $e^{+}{e}^{-}\to {\mathrm{\Sigma }}^{-}{\overline{\mathrm{\Sigma }}}^{+}$ processes are determined for center-of-mass energy from 2.3864 to 3.0200 GeV with the BESIII detector. The cross section lineshapes can be described properly by a pQCD function and the resulting ratio of effective form factors for the ${\mathrm{\Sigma }}^{+}$ and ${\mathrm{\Sigma }}^{-}$ is consistent with 3. In addition, ratios of the ${\mathrm{\Sigma }}^{+}$ electric and magnetic form factors, $|G_E/G_M|$, are obtained at three center-of-mass energies through an analysis of the angular distributions. These measurements, which are studied for the first time in the off-resonance region, provide precision experimental input for understanding baryonic structure. The observed new features of the ${\mathrm{\Sigma }}^{\pm }$ form factors require more theoretical discussions for the hyperons.