Recent radio observations of Jupiter

Decametric and decimetric observations of Jupite

Long wavelength investigations of solar, planetary, and galaxy emissions Final report, May 1 - Sep. 30, 1964

Feasibility of constructing large antenna array and interferometer for radio astronomy studies and spectral observations of discrete sources, sun, and Galax

The design of large steerable arrays using voltage-variable capacitors Status report, Oct. 1, 1965 - Mar. 31, 1966

Design of rapidly steerable high resolution antenna array using voltage variable capacitors suitable for radio astronom

Independent therapeutic advice: How achievable is it?

This supplement is likely to be of interest to anyone involved in the development of clinical guidelines and clinical research, including: • health professionals, trainees and students who use guidelines as a basis for their decision making • policy makers and others working to improve the quality of health care • people involved in university, college and hospital education. The supplement outlines the issues discussed at an Independence Forum hosted by Therapeutic Guidelines Limited in Melbourne, Australia, on 29 October 2012. It puts forward recommendations to overcome limitations of the evidence base and improve the trustworthiness of guidelines. Therapeutic Guidelines is an independent, not-forprofit organisation that was established to promote the quality use of medicines through the publication of clear, concise and ready to use guidelines. Therapeutic Guidelines convened the Independence Forum to discuss issues of independence and conflicts of interest in the context of the development of therapeutic guidelines for health professionals. Two eminent overseas speakers, Professor Silvio Garattini from the Mario Negri Institute, Italy, and Assistant Professor Barbara Mintzes from the University of British Columbia, Canada, gave keynote presentations on the complexity of the therapeutic environment and clinical evidence base. Key Australian commentators and health ethicists – Professor Paul Komesaroff from the Centre for the Study of Ethics in Medicine and Society at Monash University, and Associate Professor Ian Kerridge from the Centre for Values, Ethics and the Law in Medicine at the University of Sydney – focused on the influence of vested interests in clinical research trials and guideline development, citing high profile examples such as the case of hormone therapy after menopause. Panel discussions provided insights on these issues from a range of perspectives, including government, evidence-based medicine, clinical research, health professionals and community. During the last session, speakers and participants worked in small groups to formulate recommendations and strategies to improve the suitability of the evidence base and trustworthiness of therapeutic recommendations and guidelines.NP

Independent therapeutic advice: How achievable is it?

This supplement is likely to be of interest to anyone involved in the development of clinical guidelines and clinical research, including: • health professionals, trainees and students who use guidelines as a basis for their decision making • policy makers and others working to improve the quality of health care • people involved in university, college and hospital education. The supplement outlines the issues discussed at an Independence Forum hosted by Therapeutic Guidelines Limited in Melbourne, Australia, on 29 October 2012. It puts forward recommendations to overcome limitations of the evidence base and improve the trustworthiness of guidelines. Therapeutic Guidelines is an independent, not-forprofit organisation that was established to promote the quality use of medicines through the publication of clear, concise and ready to use guidelines. Therapeutic Guidelines convened the Independence Forum to discuss issues of independence and conflicts of interest in the context of the development of therapeutic guidelines for health professionals. Two eminent overseas speakers, Professor Silvio Garattini from the Mario Negri Institute, Italy, and Assistant Professor Barbara Mintzes from the University of British Columbia, Canada, gave keynote presentations on the complexity of the therapeutic environment and clinical evidence base. Key Australian commentators and health ethicists – Professor Paul Komesaroff from the Centre for the Study of Ethics in Medicine and Society at Monash University, and Associate Professor Ian Kerridge from the Centre for Values, Ethics and the Law in Medicine at the University of Sydney – focused on the influence of vested interests in clinical research trials and guideline development, citing high profile examples such as the case of hormone therapy after menopause. Panel discussions provided insights on these issues from a range of perspectives, including government, evidence-based medicine, clinical research, health professionals and community. During the last session, speakers and participants worked in small groups to formulate recommendations and strategies to improve the suitability of the evidence base and trustworthiness of therapeutic recommendations and guidelines.NP

A person-centred problem

It has become commonly expected that the “personhood” of people with dementia should be recognised, understood in the relational sense that is now widely adopted in healthcare practices. Despite its broad acceptance, however, the concept of personhood remains problematic in dementia care, as a result both of the theoretical challenges it poses and the practices that arise from it. This work employs the technique of ethnographic observation of residents, family members, and care staff of an aged care facility to explore the ways in which various modalities of the “self” are displayed in persons with dementia. The results provide insights into the moral and ontological impact of personhood on the systems that structure and influence interactions involving people with dementia. We conclude that privileging a preserved identity in dementia, and delivering care that conforms to contemporary “person-centred” expectations may limit recognition of the fluid, ongoing selfhood of people with dementia and that a reconsideration of this focus may enable us to expand our understanding of, and our responses to, their changing experiences

MOJAVE: Monitoring of Jets in AGN with VLBA Experiments - II. First-Epoch 15 GHz Circular Polarization Results

We report first-epoch circular polarization results for 133 active galactic nuclei in the MOJAVE program to monitor the structure and polarization of a flux limited sample of extra-galactic radio jets with the VLBA at 15 GHz. We found strong circular polarization ($\geq 0.3$%) in approximately 15% of our sample. The circular polarization was usually associated with jet cores; however, we did find a few strong jet components to be circularly polarized. The levels of circular polarization were typically in the range of $0.3-0.5$% of the local Stokes-$I$. We found no strong correlations between fractional circular polarization of jet cores and source type, redshift, EGRET detections, linear polarization, or other observed parsec-scale jet properties. There were differences between the circular-to-linear polarization ratios of two nearby galaxies versus more distant quasars and BL Lac objects. We suggest this is because the more distant sources either have (1) less depolarization of their linear polarization, and/or (2) poorer effective linear resolution and therefore their VLBA cores apparently contain a larger amount of linearly polarized jet emission. The jet of 3C 84 shows a complex circular polarization structure, similar to observations by Homan & Wardle five years earlier; however, much of the circular polarization seems to have moved, consistent with a proper motion of 0.06$c$. The jet of 3C 273 also has several circularly polarized components, and we find their fractional circular polarization decreases with distance from the core.Comment: 24 pages, accepted to appear in Astronomical Journa

Toward An Empirical Theory of Pulsar Emission. VII. On the Spectral Behavior of Conal Beam Radii and Emission Heights

In this paper we return to the old problem of conal component-pair widths and profile dimensions. Observationally, we consider a set of 10 pulsars with prominent conal component pairs, for which well measured profiles exist over the largest frequency range now possible. Apart from some tendency to narrow at high frequency, the conal components exhibit almost constant widths. We use all three profile measures, the component separation as well as the outside half-power and 10% widths, to determine conal beam radii, which are the focus of our subsequent analysis. These radii at different frequencies are well fitted by a relationship introduced by Thorsett (1991), but the resulting parameters are highly correlated. Three different types of behavior are found: one group of stars exhibits a continuous variation of beam radius which can be extrapolated down to the stellar surface along the ``last open field lines''; a second group exhibits beam radii which asymptotically approach a minimum high frequency value that is 3--5 times larger; and a third set shows almost no spectral change in beam radius at all. The first two behaviors are associated with outer-cone component pairs; whereas the constant separation appears to reflect inner-cone emission.Comment: 21 pages, 11 figures, accepted for publication in Astrophysical Journal, uses aaste

Confirmation and Analysis of Circular Polarization from Sagittarius A*

Recently Bower et al. (1999b) have reported the detection of circular polarization from the Galactic Center black hole candidate, Sagittarius A*. We provide an independent confirmation of this detection, and provide some analysis on the possible mechanisms.Comment: 14 pages, to appear in Astrophysical Journal Letter

Observations of a Series of Six Recent Glitches in the Crab Pulsar

From 1995 to 1999, daily monitoring of the radio emission from the Crab pulsar at the Green Bank and Jodrell Bank observatories revealed a series of six sudden rotational spinups or glitches, doubling the number of glitches observed for this pulsar since 1969. With these observations, the range of time intervals between significant Crab glitches has widened considerably, indicating that the occurrence of Crab glitches may be more random than previously thought. The new glitch amplitudes ($\Delta\nu/\nu$) span an order of magnitude from 2e-9 to 3e-8. Except in one case, which we suggest may represent an ``aftershock'' event, the frequency jumps display an exponential recovery with a timescale of $\sim$3 days for the smaller glitches and $\sim$10 days for the largest (1996) glitch. In the largest event, a portion of the spinup was resolved in time, as was previously reported for the 1989 glitch. A pronounced change in frequency derivative also occurs after each glitch and is correlated with the size of the initial frequency jump, although for some of the smaller glitches this appears to be a temporary effect. We discuss the properties of the ensemble of observed Crab glitches and compare them with the properties of Vela glitches, highlighting those differences which must be explained by evolutionary models.Comment: 15 pages, 14 embedded figures, to appear in Ap