The evolution of the Galápagos mantle plume.

The lavas associated with mantle plumes may sample domains throughout Earth's mantle and probe its dynamics. However, plume studies are often only able to take snapshots in time, usually of the most recent plume activity, leaving the chemical and geodynamic evolution of major convective upwellings in Earth's mantle poorly constrained. Here, we report the geodynamically key information of how the lithology and density of a plume change from plume head phase to tail. We use iron stable isotopes and thermodynamic modeling to show that the Galápagos plume has contained small, nearly constant, amounts of dense recycled crust over its 90-million-year history. Despite a temporal evolution in the amount of recycled crust-derived melt in Galápagos-related lavas, we show that this can be explained by plume cooling alone, without associated changes in the plume's mantle source; results are also consistent with a plume rooted in a lower mantle low-velocity zone also sampling primordial components.

Nudging as a Support for Behavioral Change in Lifestyle Medicine.

The practice of lifestyle medicine and its emphasis on behavioral change continues to grow around the world. Yet much of the burden of disease weighing on healthcare systems from chronic, modifiable conditions remains stubbornly present. From a behavior change perspective, efforts to date have primarily focused on public health messaging and public health campaigns (global approaches) to interventions such as health coaching (individual approaches). There exists an opportunity to consider contextual elements which support behavioral change. The practice of "nudging" behavior in primary care and allied health settings is proposed as a means of responding to these contextual opportunities. Nudging does not assure change; however, it can invite curiosity about change and small behavioral efforts in the direction of a desired change. Furthermore, its nature conserves autonomy and patient choice while inviting a health-creating behavior. As such, when considered and applied in the context of public health and individual treatment options, it creates a consistent milieu in which behavior change is facilitated.

Lifestyle Medicine Core Competencies: 2022 Update.

The lifestyle medicine core competencies were developed by a committee of physicians from several medical specialties to provide guidance on the knowledge and skills needed for physicians to provide high quality lifestyle interventions that optimize chronic disease outcomes. These competencies were published in the Journal of the American Medical Association (JAMA) in 2010 and used as the foundation for the first lifestyle medicine course and for the lifestyle medicine board certification examination. In the ensuing years, interest in the field and application has expanded to a variety of health professionals. With evolution of the lifestyle medicine evidence-base, the competencies have been updated. This article sums up the changes in their organization and content. Regular updates are anticipated to align with the ongoing scientific studies and evolution of the field.

Rapid shifting of a deep magmatic source at Fagradalsfjall volcano, Iceland.

Recent Icelandic rifting events have illuminated the roles of centralized crustal magma reservoirs and lateral magma transport1-4, important characteristics of mid-ocean ridge magmatism1,5. A consequence of such shallow crustal processing of magmas4,5 is the overprinting of signatures that trace the origin, evolution and transport of melts in the uppermost mantle and lowermost crust6,7. Here we present unique insights into processes occurring in this zone from integrated petrologic and geochemical studies of the 2021 Fagradalsfjall eruption on the Reykjanes Peninsula in Iceland. Geochemical analyses of basalts erupted during the first 50 days of the eruption, combined with associated gas emissions, reveal direct sourcing from a near-Moho magma storage zone. Geochemical proxies, which signify different mantle compositions and melting conditions, changed at a rate unparalleled for individual basaltic eruptions globally. Initially, the erupted lava was dominated by melts sourced from the shallowest mantle but over the following three weeks became increasingly dominated by magmas generated at a greater depth. This exceptionally rapid trend in erupted compositions provides an unprecedented temporal record of magma mixing that filters the mantle signal, consistent with processing in near-Moho melt lenses containing 107-108 m3 of basaltic magma. Exposing previously inaccessible parts of this key magma processing zone to near-real-time investigations provides new insights into the timescales and operational mode of basaltic magma systems.

Identifying management practices that drive production-line workers' engagement through qualitative analysis.

INTRODUCTION: Engagement research - most often defined by a worker's psychological state of vigor, dedication, and absorption - pays little attention to production-line workers. This study therefore explores factors that drive workers' engagement with health and safety (H&S) in a production-line context as well as their perception of managerial influence Furthermore, the study adds to the body of research by exploring H&S engagement concepts through the use of qualitative research methods. METHOD: 38 semi-structured interviews were conducted and analyzed through template analysis to identify themes that promote and hinder engagement. RESULTS: The main engagement drivers were found to be: (a) the displayed safety focus of the company in organizational and social aspects; (b) the quality of the communication approach with respect to quality, consistency and direction; and (c) the environment encompassing the relationship between workers and supervisors and peers as well as the psychological environment. Notably, a trusting relationship between supervisors and workers appeared to be the most influential driver in determining engaged H&S behavior. Discussion and impact in industry: The study highlights factors that could be adapted to improve engagement and consequently enhance H&S approaches. Originality: The study reported in this paper offers a unique insight into individual production workers' perceived drivers of H&S engagement using Qualitative Analysis. Practical applications: The study identified the important role that supervisors play in workers' H&S engagement levels and what skills they need to employ to enhance workers' engagement in general and in the context of H&S behavior and performance. Furthermore, the importance of psychological and sociological factors in safety approaches are highlighted and were found to be key for creating safer workplaces.

Iron isotopes trace primordial magma ocean cumulates melting in Earth's upper mantle.

The differentiation of Earth ~4.5 billion years (Ga) ago is believed to have culminated in magma ocean crystallization, crystal-liquid separation, and the formation of mineralogically distinct mantle reservoirs. However, the magma ocean model remains difficult to validate because of the scarcity of geochemical tracers of lower mantle mineralogy. The Fe isotope compositions (δ57Fe) of ancient mafic rocks can be used to reconstruct the mineralogy of their mantle source regions. We present Fe isotope data for 3.7-Ga metabasalts from the Isua Supracrustal Belt (Greenland). The δ57Fe signatures of these samples extend to values elevated relative to modern equivalents and define strong correlations with fluid-immobile trace elements and tungsten isotope anomalies (µ182W). Phase equilibria models demonstrate that these features can be explained by melting of a magma ocean cumulate component in the upper mantle. Similar processes may operate today, as evidenced by the δ57Fe and µ182W heterogeneity of modern oceanic basalts.

Health Coaching as an Intervention for Picky Eaters.

Although childhood "picky eating" or "fussy eating" or "food neophobia" is well established as a subject of research, commentary, and treatment guidelines, there is very little published research exploring the origins and basis of adult food neophobia, much less its treatment. Existing treatment guidelines for picky eating tend to focus on cognitive behavioral interventions. The consequences of picky eating, although not extensively researched, include inadequate nutrition and weight management difficulties-both significant contributors to the worldwide disease burden. Health coaching has a focus on personal choice, reflection on previous successes and current strengths, as well as identification of a personal health vision and achievable goals. As such, it may play a useful role in supporting behavioral change in adult picky eaters. A structured intervention, rooted in health coaching skills and culinary medicine aimed at supporting such change, is proposed.