From 2014 to 2020, we compiled radiocarbon ages from the lower 48 states, creating a database of more than 100,000 archaeological, geological, and paleontological ages that will be freely available to researchers through the Canadian Archaeological Radiocarbon Database. Here, we discuss the process used to compile ages, general characteristics of the database, and lessons learned from this exercise in “big data” compilation.

Justice can be pursued by the state, or through voluntary charity. This paper seeks to contribute to the debate about the appropriate division of labor between government and charitable agencies by developing a positive account of the charity sector's moral foundations. The account given here is grounded in a legal conception of charity, as a set of subsidies and privileges designed to cultivate a wide variety of activities aimed at enhancing civic virtue and autonomy. Among other things, this implies that a charity sector oriented largely around the pursuit of justice will come at a moral cost to a liberal society, at least when the state is in a position to take the greater share of the responsibility. So, a positive account of charity provides at least a pro tanto reason for preferring a division of labor in which the state takes a greater share of the responsibility for pursuing justice. As well as developing and defending this conception in its own right, we apply it in offering some criticisms and enhancements of existing views about the division of labor.

Background: There is an emerging evidence base that mindfulness for psychosis is a safe and effective intervention. However, empirical data on the within-session effects of mindfulness meditation was hitherto lacking. Aims: The aim of the study was to assess the impact of taking part in a mindfulness for psychosis group, using a within-session self-report measure of general stress, and symptom-related distress. Method: Users of a secondary mental health service (n = 34), who experienced enduring psychotic symptoms, took part in an 8-week mindfulness for psychosis group in a community setting. Mindfulness meditations were limited to 10 minutes and included explicit reference to psychotic experience arising during the practice. Participants self-rated general stress, and symptom-related distress, before and after each group session using a visual analogue scale. Results: Average ratings of general stress and symptom-related distress decreased from pre- to post-session for all eight sessions, although not all differences were statistically significant. There was no increase in general stress, or symptom-related distress across any session. Conclusions: There was evidence of positive effects and no evidence of any harmful effects arising from people with psychotic symptoms taking part in a mindfulness for psychosis session.

Follow-up of unidentified Fermi sources has expanded the number of known galactic-field “black widow” and “redback” millisecond pulsar binaries from four to nearly 30. Several systems observed by Chandra, XMM-Newton, Suzaku, and NuSTAR exhibit double-peaked X-ray orbital modulation. This is attributed to synchrotron emission from electrons accelerated in an intrabinary shock and Doppler boosting by mildly relativistic bulk flow. We briefly discuss the rich complexity of these systems, their astrophysical utility, and open questions.

Pulsed non-thermal quiescent emission between 10 keV and around 150 keV has been observed in ~10 magnetars. For inner magnetospheric models of such hard X-ray signals, resonant Compton upscattering of soft thermal photons from the neutron star surface is the most efficient radiative process. We present angle-dependent hard X-ray upscattering model spectra for uncooled monoenergetic relativistic electrons. The spectral cut-off energies are critically dependent on the observer viewing angles and electron Lorentz factor. We find that electrons with energies less than around 15 MeV will emit most of their radiation below 250 keV, consistent with the observed turnovers in magnetar hard X-ray tails. Moreover, electrons of higher energy still emit most of the radiation below around 1 MeV, except for quasi-equatorial emission locales for select pulses phases. Our spectral computations use new state-of-the-art, spin-dependent formalism for the QED Compton scattering cross section in strong magnetic fields.