Σ−\Sigma^- Photoproduction on the Neutron: Results from CLAS

As part of a broader study of kaon photoproduction on deuterium, the $\gamma n \to K^{+} \Sigma^{-}$ channel was investigated. The data were acquired at Jefferson Lab using the CLAS detector and the Photon-Tagging Facility installed in Hall B. The photon energy range covered was from 0.50 to 2.95 GeV. For the present analysis, the $\gamma n \to K^{+} \Sigma^{-}$ channel was identified by detecting the positive kaon in coincidence with both decay products of the $\Sigma^-$ hyperon, $\pi^-$ and $n$. Preliminary differential cross--sections are shown as a function of the invariant energy W and the kaon polar angle in the center of mass system.Comment: 9 pages, 5 figures, INPC2001 proceeding

Effects of ultrasound on Transforming Growth Factor-beta genes in bone cells

Therapeutic ultrasound (US) is a widely used form of biophysical stimulation that is increasingly applied to promote fracture healing. Transforming growth factor-beta (TGF-beta), which is encoded by three related but different genes, is known to play a major part in bone growth and repair. However, the effects of US on the expression of the TGF-beta genes and the physical acoustic mechanisms involved in initiating changes in gene expression in vitro, are not yet known. The present study demonstrates that US had a differential effect on these TGF-beta isoforms in a human osteoblast cell line, with the highest dose eliciting the most pronounced up-regulation of both TGF-beta1 and TGF-beta3 at 1 hour after treatment and thereafter declining. In contrast, US had no effect on TGF-beta2 expression. Fluid streaming rather than thermal effects or cavitation was found to be the most likely explanation for the gene responses observed in vitro

Edge momentum transport by neutrals: an interpretive numerical framework

Due to their high cross-field mobility, neutrals can contribute to momentum transport even at the low relative densities found inside the separatrix and they can generate intrinsic rotation. We use a charge-exchange dominated solution to the neutral kinetic equation, coupled to neoclassical ions, to evaluate the momentum transport due to neutrals. Numerical solutions to the drift-kinetic equation allow us to cover the full range of collisionality, including the intermediate levels typical of the tokamak edge. In the edge there are several processes likely to contribute to momentum transport in addition to neutrals. Therefore, we present here an interpretive framework that can evaluate the momentum transport through neutrals based on radial plasma profiles. We demonstrate its application by analysing the neutral angular momentum flux for an L-mode discharge in the ASDEX Upgrade tokamak. The magnitudes of the angular momentum fluxes we find here due to neutrals of 0.6 – 2 Nm are comparable to the net torque on the plasma from neutral beam injection, indicating the importance of neutrals for rotation in the edge.Vetenskapsrådet and Marie Sklodowska Curie Actions, Cofund, Project INCA 60039

Are we overusing IVF?

Peer reviewedPublisher PD

The asteroseismic ground-based observational counterpart of CoRoT

We present different aspects of the ground-based observational counterpart of the CoRoT satellite mission. We give an overview of the selected asteroseismic targets, the numerous instruments and observatories involved, and the first scientific results.Comment: 3 pages, 2 tables, 1 figure, to be published in the conference proceedings 'Stellar Pulsation: Challenges for Theory and Observation' (31 May - 5 June, Santa Fe, New Mexico, US), publishers: American Institute of Physic

Performance of indigenous chicken under intensive rearing with various litter materials

The purpose of the research was to obtain information regarding the performance of indigenous chicken under intensive rearing. The performance criteria were the increasing body abdominal weight, fat, rectal temperature, and the indigenous chicken’s mortality within the 5-week starter phase treatment. Research was conducted using 108 Day Old Chick (DOC). Data variance was analysed based on the split plot design (3 types of cage litter materials, 5 weeks of data collection, and 4 replications) for weight gain and abdominal fat parameters, and completely randomized design in time for rectal temperature. The result indicated a significant effect of different litter materials towards weight gain (P <0.01), the highest body weight was found on chicken treated with rice straw litter; there was no effect of litter material on abdominal fat percentage; there was a significant effect (P < 0.01) of age towards rectal temperature; and there were no interactions between litter material with age, on body weight gain, abdominal fat, and rectal temperature. Chickens under intensive rearing in rice straw floored cages were proven to have a mortality rate reduced by 3.7% in the starter phase

ESC core curriculum for the general cardiologist (2013)

[No abstract available