Search for anomalous production of prompt like-sign lepton pairs at s√=7TeV with the ATLAS detector

An inclusive search for anomalous production of two prompt, isolated leptons with the same electric charge is presented. The search is performed in a data sample corresponding to 4.7 fb(-1) of integrated luminosity collected in 2011 at root s = 7TeV with the ATLAS detector at the LHC. Pairs of leptons (e(+/-)e(+/-), e(+/-)mu(+/-), and mu(+/-)mu(+/-)) with large transverse momentum are selected, and the dilepton invariant mass distribution is examined for any deviation from the Standard Model expectation. No excess is found, and upper limits on the production cross section of like-sign lepton pairs from physics processes beyond the Standard Model are placed as a function of the dilepton invariant mass within a fiducial region close to the experimental selection criteria. The 95% confidence level upper limits on the cross section of anomalous e(+/-)e(+/-), e(+/-)mu(+/-), or mu(+/-)mu(+/-) production range between 1.7 fb and 64 fb depending on the dilepton mass and flavour combination

Randomized clinical trial comparing two mastectomy techniques

Background: The unit was considering the routine use of diathermy scissors for standard mastectomy surgery. We therefore aimed to assess scientifically the outcome of patients following the use of this instrument in their operation before accepting it as a routine procedure. Methods: A single blind randomized control trial compared the outcome of patients undergoing simple mastectomy using either the standard scalpel blade technique or the bipolar cutting scissors technique. Each arm of the trial contained 30 patients. Results: The two primary outcome measures were blood loss intraoperatively and the operating time. There was a significant difference between the two groups, with a statistically significant benefit in the scissors group in terms of the secondary outcome measures of chest wall clearance and skin flap development as assessments of surgical completeness of mastectomy.There is no evidence of any other secondary outcome measures differing between the treatment groups. Conclusion: There is strong evidence that using electric scissors reduces intraoperative blood loss and operating time. There is some evidence that the scissors may provide better surgical completeness of mastectomy

Pathways to lexical ambiguity: fMRI evidence for bilateral fronto-parietal involvement in language processing.

Numerous functional neuroimaging studies reported increased activity in the pars opercularis and the pars triangularis (Brodmann's areas 44 and 45) of the left hemisphere during the performance of linguistic tasks. The role of these areas in the right hemisphere in language processing is not understood and, although there is evidence from lesion studies that the right hemisphere is involved in the appreciation of semantic relations, no specific anatomical substrate has yet been identified. This event-related functional magnetic resonance imaging study compared brain activity during the performance of language processing trials in which either dominant or subordinate meaning activation of ambiguous words was required. The results show that the ventral part of the pars opercularis both in the left and the right hemisphere is centrally involved in language processing. In addition, they highlight the bilateral co-activation of this region with the supramarginal gyrus of the inferior parietal lobule during the processing of this type of linguistic material. This study, thus, provides the first evidence of co-activation of Broca's region and the inferior parietal lobule, succeeding in further specifying the relative contribution of these cortical areas to language processing