The Deep SWIRE Field III. WIYN Spectroscopy

We present the results of spectroscopy using HYDRA on the WIYN 3.5m telescope of objects in the deep SWIRE radio field. The goal of the project was to determine spectroscopic redshifts for as many of the brighter objects in the field as possible, especially those detected in the radio and at 24 microns. These redshifts are primarily being used in studies of galaxy evolution and the connection of that evolution to AGN and star-formation. Redshifts measured for 365 individual objects are reported. The redshifts range from 0.03 to 2.5, mostly with z < 0.9. The sources were selected to be within the WIYN HYDRA field of approximately 30' in radius from the center of the SWIRE deep field, 10h46m00s, 59d 01'00" (J2000). Optical sources for spectroscopic observation were selected from a r-band image of the field. A priority list of spectroscopic targets was established in the following order: 20cm detections, 24 micron detections, galaxies with r < 20 and the balance made up of fainter galaxies in the field. We provide a table listing the galaxy positions, measured redshift and error, and note any emission lines that were visible in the spectrum. In practice almost all the galaxies with r < 19 were observed including all of the radio sources and most of the 24 microns sources with r < 20 and a sample of radio sources which had fainter optical counterparts on the r-band image.Comment: 6 pages, 3 tables, 2 figures, full electronic tables at http://www.aoc.nrao.edu/~fowen/papers/SWIRE/WIYNpaper3/, accepted ApJ Suppl Serie

Development and Psychometric Analysis of The Patient Perceptions of Patient-Empowering Nurse Behaviours Scale (PPPNBS)

Aim To (1) develop and psychometrically test the Patient Perceptions of Patient-Empowering Nurse Behaviours Scale, which measures patient perceptions of empowering nurse behaviours during hospitalization; and (2) refine to a shorter, more useful form, for measurement in clinical settings. Background Although patient empowerment has been promoted as a way to engage patients in chronic illness care, there is not a measure reported by patients as recipients of empowering nurse behaviours during hospitalization. Design Psychometric evaluation of construct and predictive validity, reliability and item reduction. Method Data gathered during hospitalization and six weeks postdischarge between April 2012 - August 2014 were used to determine the validity and reliability of the long and short-form Patient Perceptions of Patient-Empowering Nurse Behaviours Scale in a sample of 395 chronically ill medical and surgical adult patients. Results The long and short-form Patient Perceptions of Patient-Empowering Nurse Behaviours Scale demonstrated strong reliability and convergent validity with pre-discharge 13-item Patient Activation Measure scores. Both forms of the Patient Perceptions of Patient-Empowering Nurse Behaviours Scale predicted postdischarge 13-item Patient Activation Measure scores and the long-form predicted physical health status. Confirmatory factor analysis demonstrated improved model fit for the short-form instrument when compared with the long-form fit. The short-form Patient Perceptions of Patient-Empowering Nurse Behaviours Scale explained 98% of the variance of the long-form Patient Perceptions of Patient-Empowering Nurse Behaviours Scale. Conclusion The results provide evidence supporting reliability and validity of both forms. While the scales measure patient reports and not direct observation of empowering nurse behaviours, incorporating patients\u27 experiences as recipients of care is necessary to validate the contribution of nursing care to patients\u27 engagement in chronic illness management

Magnetically controlled mass loss from extrasolar planets in close orbits

We consider the role magnetic fields play in guiding and controlling mass-loss via evaporative outflows from exoplanets that experience UV irradiation. First we present analytic results that account for planetary and stellar magnetic fields, along with mass-loss from both the star and planet. We then conduct series of numerical simulations for gas giant planets, and vary the planetary field strength, background stellar field strength, UV heating flux, and planet mass. These simulations show that the flow is magnetically controlled for moderate field strengths and even the highest UV fluxes, i.e., planetary surface fields $B_P\gtrsim 0.3$ gauss and fluxes $F_{UV}\sim10^{6}$ erg s$^{-1}$. We thus conclude that outflows from all hot Jupiters with moderate surface fields are magnetically controlled. The inclusion of magnetic fields highly suppresses outflow from the night-side of the planet. Only the magnetic field lines near the pole are open and allow outflow to occur. The fraction of open field lines depends sensitively on the strength (and geometry) of the background magnetic field from the star, along with the UV heating rate. The net effect of the magnetic field is to suppress the mass loss rate by (approximately) an order of magnitude. Finally, some open field lines do not allow the flow to pass smoothly through the sonic point; flow along these streamlines does not reach steady-state, resulting in time-variable mass-loss.Comment: Accepted for publication in MNRAS, 20 pages, 13 figure

A direct-execution parallel architecture for the Advanced Continuous Simulation Language (ACSL)

A direct-execution parallel architecture for the Advanced Continuous Simulation Language (ACSL) is presented which overcomes the traditional disadvantages of simulations executed on a digital computer. The incorporation of parallel processing allows the mapping of simulations into a digital computer to be done in the same inherently parallel manner as they are currently mapped onto an analog computer. The direct-execution format maximizes the efficiency of the executed code since the need for a high level language compiler is eliminated. Resolution is greatly increased over that which is available with an analog computer without the sacrifice in execution speed normally expected with digitial computer simulations. Although this report covers all aspects of the new architecture, key emphasis is placed on the processing element configuration and the microprogramming of the ACLS constructs. The execution times for all ACLS constructs are computed using a model of a processing element based on the AMD 29000 CPU and the AMD 29027 FPU. The increase in execution speed provided by parallel processing is exemplified by comparing the derived execution times of two ACSL programs with the execution times for the same programs executed on a similar sequential architecture