8,952 research outputs found
On the potential use of radar-derived information in operational numerical weather prediction
Estimates of requirements likely to be levied on a new observing system for mesoscale meteonology are given. Potential observing systems for mesoscale numerical weather prediction are discussed. Thermodynamic profiler radiometers, infrared radiometer atmospheric sounders, Doppler radar wind profilers and surveillance radar, and moisture profilers are among the instruments described
Treatment resistant depression in primary care: Co-constructing difficult encounters
Many patients with depression do not recover despite medication or therapy. Individuals with treatment resistant depression often have co-morbid anxiety, personality difficulties and drug or alcohol misuse and have been characterised as difficult, heartsink or problem personalities by general practitioners. Yet critical studies of interaction in medical settings suggest that the context may have a role in constructing the patient. A total of 12 audio-recorded routine consultations were analysed following guidelines for qualitative analysis of medical discourse. The interpretation focused on ways in which the context and structure of primary care consultations in a UK setting construct difficult encounters, which may lead to patients with treatment resistant depression being seen as difficult to manage in various ways. Three overarching observations were that presentation of multiple problems in multiple domains clash with the consultation format; that patients? atypically high level of activity in a time-limited setting prevents patient-centred work; that the question and answer format restricts multifaceted discussions of social and emotional problems, preventing shared understandings emerging. However, although interactions appear uneasy, they are repaired and may be moderately palliative. Suggestions are made for re-orienting general practitioner work with treatment resistant depression towards long-term goal setting outside of the traditional consultation structure in order to develop shared understandings
Two-mirror Schwarzschild aplanats. Basic relations
It is shown that the theory of aplanatic two-mirror telescopes developed by
Karl Schwarzschild in 1905 leads to the unified description both the prefocal
and the postfocal systems. The class of surfaces in the ZEMAX optical program
has been properly extended to ascertain the image quality in exact
Schwarzschild aplanats. A comparison of Schwarzschild aplanats with approximate
Ritchey-Chretien and Gregory-Maksutov aplanatic telescopes reveals a noticeable
advantage of the former at fast focal ratio of the system.Comment: 19 page
Octupole strength in the neutron-rich calcium isotopes
Low-lying excited states of the neutron-rich calcium isotopes Ca
have been studied via -ray spectroscopy following inverse-kinematics
proton scattering on a liquid hydrogen target using the GRETINA -ray
tracking array. The energies and strengths of the octupole states in these
isotopes are remarkably constant, indicating that these states are dominated by
proton excitations.Comment: 15 pages, 3 figure
Spectroscopy of Ti and the systematic behavior of low energy octupole states in Ca and Ti isotopes
Excited states of the nucleus Ti have been studied, via both
inverse-kinematics proton scattering and one-neutron knockout from Ti by
a liquid hydrogen target, using the GRETINA -ray tracking array.
Inelastic proton-scattering cross sections and deformation lengths have been
determined. A low-lying octupole state has been tentatively identified in
Ti for the first time. A comparison of results on low-energy
octupole states in the neutron-rich Ca and Ti isotopes with the results of
Random Phase Approximation calculations demonstrates that the observed
systematic behavior of these states is unexpected.Comment: 7 pages, 8 figure
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