Acoustic tests of duct-burning turbofan jet noise simulation: Comprehensive data report. Volume 2: Model design and aerodynamic test results

The selection procedure is described which was used to arrive at the configurations tested, and the performance characteristics of the test nozzles are given

Heat Capacity Mapping Mission

The Tasman Front was delineated by airborne expendable bathythermograph survey; and an Heat Capacity Mapping Mission (HCMM) IR image on the same day shows the same principal features as determined from ground-truth. It is clear that digital enhancement of HCMM images is necessary to map ocean surface temperatures and when done, the Tasman Front and other oceanographic features can be mapped by this method, even through considerable scattered cloud cover

Bowel cancer screening and people with intellectual disabilities: working in co-production and establishing principles for good practice initiatives

Bowel cancer is the fourth most common cancer in England, and with one in 20 people developing the condition, it is the second highest cause of cancer deaths. If diagnosed early, treatment can be more effective and bowel cancer screening programmes can reduce these mortality figures, yet for people with learning disabilities, the uptake of screening is significantly lower than the rest of the population. Aims To describe the process of co-production when working with a group of people with learning disabilities to explore why they may be reluctant to access bowel cancer screening. Methods A consultation meeting was held with one of the authors, six people with learning disabilities, an advocate and two specialist nurses. A feedback session was organised and a report using clear information was written in conjunction with the participants. Findings Participants discussed what gets in the way of attending for bowel screening and what might help to increase uptake, including awareness, support and clear information. Conclusion Working in co-production proved mutually beneficial as local clinicians also learned how to communicate more effectively with people who have learning disabilities

Line Broadening in Field Metal-poor Red Giant and Red Horizontal Branch Stars

We report 349 radial velocities for 45 metal-poor field red giant and red horizontal branch stars. We have have identified one new spectroscopic binary, HD 4306, and one possible such system, HD 184711. We also report 57 radial velocities for 11 of the 91 stars reported on previously by Carney et al. (2003). As was found in the previous study, radial velocity "jitter" is present in many of the most luminous stars. Excluding stars showing spectroscopic binary orbital motion, all 7 of the red giants with M(V) <= -2.0 display jitter, as well as 3 of the 14 stars with -2.0 <= M(V) <= -1.4. We have also measured line broadening in all of the new spectra, using synthetic spectra as templates. The most luminous red giants show significant line broadening, as do many of the red horizontal branch stars, and we discuss briefly possible causes.Comment: To appear in the Astronomical Journa

Calculated properties of nitrogen-vacancy complexes in beryllium- and magnesium-doped GaN

The properties of defect complexes consisting of a nitrogen vacancy with a substitutional beryllium or magnesium atom on neighboring lattice sites in hexagonal GaN are calculated using the AIMPRO local-density-functional theory method. Both types of defects VN−BeGa and VN−MgGa are bound with respect to their isolated constituents. They do not appear to have any electronic levels in the bandgap, and are expected to be neutral defects. Important structural differences are found. In its minimum energy configuration, the Be atom in the VN−BeGa complex lies nearly in the same plane as the three equivalent N atoms nearest to it. Thus, it has shorter Be−N bonds than the Ga−N distance in the bulk crystal, while the Mg atom in the VN−MgGa complex occupies a position closer the lattice site of the Ga atom it replaces. Hence, the VN−BeGa complex has a larger open volume than the VN−MgGa complex. This is consistent with positron annihilation experiments [Saarinen et al., J. Cryst. Growth 246, 281 (2002); Hautakangas et al., Phys. Rev. Lett. 90, 137402 (2003)]. The frequency of the highest local vibrational mode of the VN−BeGa center is calculated to be within 3–4 % of an infrared absorption line detected in Be-doped GaN [Clerjaud (private communication)].Peer reviewe