The southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Curculionidae: Scolytinae), is among the most destructive bark beetle pests of pines (Pinaceae) of the southeast and mid-Atlantic United States of America, Mexico, and Central America. Numerous volatile compounds can stimulate or reduce attraction of the beetle, but efforts to incorporate these into effective, practical technologies for pest management have yielded mixed results. Attractants have been incorporated into lures used in monitoring traps that are employed operationally to forecast outbreaks and detect emerging populations. The attraction inhibitor, verbenone, shows efficacy for suppressing southern pine beetle infestations but has not yet been adopted operationally. No effective semiochemical tree protectant has been developed for the beetle. We discuss complexities in the chemical ecology of the beetle that likely have impeded research and development of semiochemical management tools, and we describe basic science gaps that may hinder further progress if not addressed. We also report some supporting, original experimental data indicating (1) that a verbenone device can inhibit the beetle’s response to sources of attractant in a radius of at least several metres, (2) similar olfactory responses by the beetle to both enantiomers of verbenone, and (3) that pheromone background can cause conflicting results in semiochemical field tests.

Optical tracking systems typically trade off between astrometric precision and field of view. In this work, we showcase a networked approach to optical tracking using very wide field-of-view imagers that have relatively low astrometric precision on the scheduled OSIRIS-REx slingshot manoeuvre around Earth on 22 Sep 2017. As part of a trajectory designed to get OSIRIS-REx to NEO 101955 Bennu, this flyby event was viewed from 13 remote sensors spread across Australia and New Zealand to promote triangulatable observations. Each observatory in this portable network was constructed to be as lightweight and portable as possible, with hardware based off the successful design of the Desert Fireball Network. Over a 4-h collection window, we gathered 15 439 images of the night sky in the predicted direction of the OSIRIS-REx spacecraft. Using a specially developed streak detection and orbit determination data pipeline, we detected 2 090 line-of-sight observations. Our fitted orbit was determined to be within about 10 km of orbital telemetry along the observed 109 262 km length of OSIRIS-REx trajectory, and thus demonstrating the impressive capability of a networked approach to Space Surveillance and Tracking.

Much remains unknown about how the 2008 Great Recession, coupled with the ageing baby-boomer cohort, have shaped retirement expectations and realised retirement timing across diverse groups of older Americans. Using the Health and Retirement Study (1992–2016), we compared expectations about full-time work at age 62 (reported at ages 51–61) with realised labour force status at age 62. Of the 12,049 respondents, 34 per cent reported no chance of working full time at 62 (zero probability) and 21 per cent reported it was very likely (90–100 probability). Among those reporting no chance of working, there was a 0.111 probability of unmet expectations; among those with high expectations of working, there was a 0.430 probability of unmet expectations. Black and Hispanic Americans were more likely than white Americans to have unmet expectations of both types. Educational attainment was associated with higher probability of unexpectedly working and lower probability of unexpectedly not working. Baby-boomers experienced fewer unmet expectations than prior cohorts but more uncertainty about work status at 62. Our findings highlight the unpredictability of retirement timing for significant segments of the US population and the role of the Great Recession in contributing to uncertainty. Given the individual and societal benefits of long work lives, special attention should be paid to the high rates of unexpectedly not working at age 62.

Gravitational waves from coalescing neutron stars encode information about nuclear matter at extreme densities, inaccessible by laboratory experiments. The late inspiral is influenced by the presence of tides, which depend on the neutron star equation of state. Neutron star mergers are expected to often produce rapidly rotating remnant neutron stars that emit gravitational waves. These will provide clues to the extremely hot post-merger environment. This signature of nuclear matter in gravitational waves contains most information in the 2–4 kHz frequency band, which is outside of the most sensitive band of current detectors. We present the design concept and science case for a Neutron Star Extreme Matter Observatory (NEMO): a gravitational-wave interferometer optimised to study nuclear physics with merging neutron stars. The concept uses high-circulating laser power, quantum squeezing, and a detector topology specifically designed to achieve the high-frequency sensitivity necessary to probe nuclear matter using gravitational waves. Above 1 kHz, the proposed strain sensitivity is comparable to full third-generation detectors at a fraction of the cost. Such sensitivity changes expected event rates for detection of post-merger remnants from approximately one per few decades with two A+ detectors to a few per year and potentially allow for the first gravitational-wave observations of supernovae, isolated neutron stars, and other exotica.

Through diversity of composition, sequence, and interfacial structure, hybrid materials greatly expand the palette of materials available to access novel functionality. The NSF Division of Materials Research recently supported a workshop (October 17–18, 2019) aiming to (1) identify fundamental questions and potential solutions common to multiple disciplines within the hybrid materials community; (2) initiate interfield collaborations between hybrid materials researchers; and (3) raise awareness in the wider community about experimental toolsets, simulation capabilities, and shared facilities that can accelerate this research. This article reports on the outcomes of the workshop as a basis for cross-community discussion. The interdisciplinary challenges and opportunities are presented, and followed with a discussion of current areas of progress in subdisciplines including hybrid synthesis, functional surfaces, and functional interfaces.

Agency is the human capacity to freely choose one’s thoughts, motivations and actions without undue internal or external influences; it is distinguished from decisional capacity. Four well-known conditions that can deeply affect agency are depression, demoralization, existential distress, and family dysfunction. The study reviews how they may diminish agency in persons whose circumstances may lead them to consider or request euthanasia or assisted suicide. Since agency has been a relatively neglected dimension of autonomous choice at the end of life, it is argued that to respect the autonomy of individuals, it is essential to establish their agency.

Health reform debate understandably focuses on large system design. We should not omit attention to the “last mile” problem of physician payment theory. Achieving fundamental goals of integrative, patient-centered primary care depends on thoughtful financial support. This commentary describes the nature and importance of innovative primary care payment programs.

The government recognizes that social factors cause racial inequalities in access to resources and opportunities that result in racial health disparities. However, this recognition fails to acknowledge the root cause of these racial inequalities: structural racism. As a result, racial health disparities persist.

The ACA shifted U.S. health policy from centering on principles of actuarial fairness toward social solidarity. Yet four legal fixtures of the health care system have prevented the achievement of social solidarity: federalism, fiscal pluralism, privatization, and individualism. Future reforms must confront these fixtures to realize social solidarity in health care, American-style.

Since its enactment, the Affordable Care Act (ACA) has faced numerous legal challenges. Many of these lawsuits have focused on implementation of the law and the limits of executive power. Opponents challenged the ACA under the Obama Administration while supporters have turned to the courts to prevent the Trump Administration from undermining the law. In the meantime, Congress remains gridlocked over the ACA and many other critical health policy issues, leaving the executive branch to adopt its preferred policy approach and ultimately leading to lawsuits. This article briefly discusses the history of litigation over the ACA and some reasons why this litigation has been so enduring. The article then identifies other areas of health policy that are or could be future targets for litigation. Finally, the article comments on the potential impact of the courts on future health reform efforts.