Lithofacies, depositional systems, and depositional models of the Mississippian Barnett Formation in the southern Fort Worth Basin

The Barnett Formation in the Llano Uplift region of the southern Fort Worth Basin of north-central Texas is an Osagean-Chesterian age siliciclastic mudrock whose deposition was influenced by the structurally stable Llano Uplift, topographic variabilities, and a long-term, second-order sea-level rise. Pervious work has mostly focused on the producing northern portion of the basin. The present study uses a group of 29 cores to: (1) characterize the Barnett lithofacies, (2) define the depositional setting of each lithofacies and develop a coherent depositional model, (3) identify stacking patterns and correlative surfaces, and (4) establish a viable sequence stratigraphic framework for the succession. On the basis of core data, the Barnett strata are interpreted to have been deposited in a basinal setting, below storm-weather wave-base, under predominantly anoxic bottom waters. The analysis of core and thin sections revealed four dominant lithofacies: (1) laminated siliceous mudstone, (2) laminated calcareous siliceous mudstone, (3) skeletal packstone, and (4) phosphatic packstone and grainstone. Facies stacking patterns were correlated using phosphatic packstone facies as regional marker beds. These beds coincide with changes in clay-mineral abundances, revealed by chemostratigraphic data, and their occurrences were used to subdivide the Barnett strata into lower, middle, and upper units. The lower Barnett is characterized by cyclic sedimentation of extrabasinal clays and has the greatest thickness variability related to accumulation of the calcareous siliceous mudstone facies in graben structures. The middle Barnett is characterized by an increase in extrabasinal clay abundance compared to the lower Barnett, and the upper Barnett is characterized by a decrease in the extrabasinal clay abundance compared to the lower and middle Barnett. The phosphatic packstone facies is sourced from the outer shelf/upper slope of the adjacent Chappel Shelf and is interpreted to represent cycle tops within the aggradational stacking pattern that characterized sediment accumulation style during the second-order sea-level rise that occurred throughout Barnett deposition. The findings contribute to the understanding of the stratal architecture and depositional history of the Barnett deep-water mudrocks and are used to refine the lithofacies variability of the Barnett Formation.Geological Science

Geomorphology and the Effects of Sea Level Rise on Tidal Marshes in Casco Bay

The geomorphology of the Casco Bay shoreline has a profound effect on the size, characteristics and spatial distribution of tidal marshes in the region. Casco Bay’s steep shorelines and narrow, glacial cut coastal embayments provide relatively few opportunities for development of extensive salt marshes. On the basis of area and frequency, tidal marshes in the region are dominated by wetlands that form in glacier‐cut coastal valleys. A smaller but still significant fraction of the tidal marsh area along the Casco Bay shorelines exists in a narrow, discontinuous ribbon of green perched between tidal waters and adjacent hillsides. This unique geomorphic setting means that lessons learned from evaluations elsewhere of vulnerability of tidal marshes to sea level rise provide limited insight into implications of sea level rise (SLR) for Casco Bay’s wetlands

The foot posture index, ankle lunge test, Beighton scale and the lower limb assessment score in healthy children: a reliability study

<p>Abstract</p> <p>Background</p> <p>Outcome measures are important when evaluating treatments and physiological progress in paediatric populations. Reliable, relevant measures of foot posture are important for such assessments to be accurate over time. The aim of the study was to assess the intra- and inter-rater reliability of common outcome measures for paediatric foot conditions.</p> <p>Methods</p> <p>A repeated measures, same-subject design assessed the intra- and inter-rater reliability of measures of foot posture, joint hypermobility and ankle range: the Foot Posture Index (FPI-6), the ankle lunge test, the Beighton scale and the lower limb assessment scale (LLAS), used by two examiners in 30 healthy children (aged 7 to 15 years). The Oxford Ankle Foot Questionnaire (OxAFQ-C) was completed by participants and a parent, to assess the extent of foot and ankle problems.</p> <p>Results</p> <p>The OxAFQ-C demonstrated a mean (SD) score of 6 (6) in adults and 7(5) for children, showing good agreement between parents and children, and which indicates mid-range (transient) disability. Intra-rater reliability was good for the FPI-6 (ICC = 0.93 - 0.94), ankle lunge test (ICC = 0.85-0.95), Beighton scale (ICC = 0.96-0.98) and LLAS (ICC = 0.90-0.98). Inter-rater reliability was largely good for each of the: FPI-6 (ICC = 0.79), ankle lunge test (ICC = 0.83), Beighton scale (ICC = 0.73) and LLAS (ICC = 0.78).</p> <p>Conclusion</p> <p>The four measures investigated demonstrated adequate intra-rater and inter-rater reliability in this paediatric sample, which further justifies their use in clinical practice.</p

Determining motivation to engage in safe food handling behaviour

Purpose: To apply the protection motivation theory to safe food handling in order to determine the efficacy of this model for four food handling behaviours: cooking food properly, reducing cross-contamination, keeping food at the correct temperature and avoiding unsafe foods. Design: A cross-sectional approach was taken where all protection motivation variables: perceived severity, perceived vulnerability, self-efficacy, response efficacy, and protection motivation, were measured at a single time point. Findings: Data from 206 participants revealed that the model accounted for between 40 and 48% of the variance in motivation to perform each of the four safe food handling behaviours. The relationship between self-efficacy and protection motivation was revealed to be the most consistent across the four behaviours. Implications: While a good predictor of motivation, it is suggested that protection motivation theory is not superior to other previously applied models, and perhaps a model that focuses on self-efficacy would offer the most parsimonious explanation of safe food handling behaviour, and indicate the most effective targets for behaviour change interventions. Originality: This is the first study to apply and determine the efficacy of protection motivation theory in the context of food safety

Australian educational technologies trends 2018

Educational Technologies represent the wide range of digital tools used by teachers for teaching, students for learning, and administrators for managing schools. New tools are continually in development and often repurposed for an educational context from other industries. The following technologies have been considered as the five most significant for schools over the next 5 years, along with cost and professional learning requirements

Effect of Hydrocortisone on Mortality and Organ Support in Patients With Severe COVID-19: The REMAP-CAP COVID-19 Corticosteroid Domain Randomized Clinical Trial.

Importance: Evidence regarding corticosteroid use for severe coronavirus disease 2019 (COVID-19) is limited. Objective: To determine whether hydrocortisone improves outcome for patients with severe COVID-19. Design, Setting, and Participants: An ongoing adaptive platform trial testing multiple interventions within multiple therapeutic domains, for example, antiviral agents, corticosteroids, or immunoglobulin. Between March 9 and June 17, 2020, 614 adult patients with suspected or confirmed COVID-19 were enrolled and randomized within at least 1 domain following admission to an intensive care unit (ICU) for respiratory or cardiovascular organ support at 121 sites in 8 countries. Of these, 403 were randomized to open-label interventions within the corticosteroid domain. The domain was halted after results from another trial were released. Follow-up ended August 12, 2020. Interventions: The corticosteroid domain randomized participants to a fixed 7-day course of intravenous hydrocortisone (50 mg or 100 mg every 6 hours) (n = 143), a shock-dependent course (50 mg every 6 hours when shock was clinically evident) (n = 152), or no hydrocortisone (n = 108). Main Outcomes and Measures: The primary end point was organ support-free days (days alive and free of ICU-based respiratory or cardiovascular support) within 21 days, where patients who died were assigned -1 day. The primary analysis was a bayesian cumulative logistic model that included all patients enrolled with severe COVID-19, adjusting for age, sex, site, region, time, assignment to interventions within other domains, and domain and intervention eligibility. Superiority was defined as the posterior probability of an odds ratio greater than 1 (threshold for trial conclusion of superiority >99%). Results: After excluding 19 participants who withdrew consent, there were 384 patients (mean age, 60 years; 29% female) randomized to the fixed-dose (n = 137), shock-dependent (n = 146), and no (n = 101) hydrocortisone groups; 379 (99%) completed the study and were included in the analysis. The mean age for the 3 groups ranged between 59.5 and 60.4 years; most patients were male (range, 70.6%-71.5%); mean body mass index ranged between 29.7 and 30.9; and patients receiving mechanical ventilation ranged between 50.0% and 63.5%. For the fixed-dose, shock-dependent, and no hydrocortisone groups, respectively, the median organ support-free days were 0 (IQR, -1 to 15), 0 (IQR, -1 to 13), and 0 (-1 to 11) days (composed of 30%, 26%, and 33% mortality rates and 11.5, 9.5, and 6 median organ support-free days among survivors). The median adjusted odds ratio and bayesian probability of superiority were 1.43 (95% credible interval, 0.91-2.27) and 93% for fixed-dose hydrocortisone, respectively, and were 1.22 (95% credible interval, 0.76-1.94) and 80% for shock-dependent hydrocortisone compared with no hydrocortisone. Serious adverse events were reported in 4 (3%), 5 (3%), and 1 (1%) patients in the fixed-dose, shock-dependent, and no hydrocortisone groups, respectively. Conclusions and Relevance: Among patients with severe COVID-19, treatment with a 7-day fixed-dose course of hydrocortisone or shock-dependent dosing of hydrocortisone, compared with no hydrocortisone, resulted in 93% and 80% probabilities of superiority with regard to the odds of improvement in organ support-free days within 21 days. However, the trial was stopped early and no treatment strategy met prespecified criteria for statistical superiority, precluding definitive conclusions. Trial Registration: ClinicalTrials.gov Identifier: NCT02735707