Search

Different outcomes have been presented on the preparation of high‐temperature ceramic AnB2O2n+5 (A = Hf, Zr and B = Nb, Ta). Considering the importance of these materials as refractories, the stability range of the A = Hf and B = Nb compound is experimentally determined by preparing ceramics via solid‐state synthesis and analyzing their phase compositions. Then, the density functional theory was used to study the stability of the homologous series versus decomposition to the parent compounds of HfO2 and Nb2O5. A good agreement with the experimental values is found. In order to improve the theoretical data further, an interatomic potential based on the first‐principle calculations is developed and applied to larger supercell structures. These force‐field calculations confirm the stability of the homologous series versus a solid solution. The calculations also allow us to study cation order and periodic compositional modulation. [ABSTRACT FROM AUTHOR]

Few studies have considered the fears of gifted children. Using the American Fear Survey Schedule for Children (FSSC-AM; Burnham, 1995), a modified version of the Australian Fear Survey Schedule for Children-II (Gullone & King, 1992, 1993), this study focused on the fears of 287 gifted children ages 7-10. This study is a first step in developing contemporary normative data in fears of gifted children. Two "a priori" discriminant analyses were used to investigate which factor scores discriminated between gender and ethnicity. Additionally, 2 item analyses were completed to examine which fear items on the FSSC-AM discriminated between gender and ethnicity. Results are reported and compared to previous studies. Implications and recommendations for future fear research with gifted children also are discussed. Further research is necessary to discern differences in fears of gifted children and their peers. (Contains 1 table.)

Abstract Introduction Opioid overdose rescue situations are time-critical, high-stress scenarios that frequently require nonmedical first responders or bystanders to intervene and administer naloxone to avoid opioid-induced fatalities. Training nonmedical personnel to respond during such mentally constraining situations presents the human factors challenge of how best to design a safe and effective lay delivery system. This paper comparatively evaluates the ease of use of two nasal naloxone administration products: NARCAN ® Nasal Spray and a naloxone prefilled syringe with nasal atomizer (PFS-NA). Methods We evaluated the use requirements and usability of NARCAN ® Nasal Spray versus a naloxone PFS-NA using a systems-oriented method. First, we determined the use requirements of different user groups. Next, we focused on constructing a human factors task analysis of both products. Finally, we conducted a comparative risk assessment of the tasks that were different between the two products. Results Inexperienced users, such as nonmedical first responders and bystanders, are at the highest risk of incorrectly administering naloxone, particularly in high-stress emergency opioid overdose situations. The device Preparation and Medication Delivery tasks most differentiate the use of NARCAN ® Nasal Spray and a PFS-NA. The level of task complexity and number of steps within those tasks is substantially greater for a PFS-NA than for the NARCAN ® Nasal Spray. Conclusions NARCAN ® Nasal Spray requires fewer steps and is easier to administer than a naloxone PFS-NA. Thus, using NARCAN ® Nasal Spray should increase the likelihood that nonmedical personnel correctly deliver naloxone in time-critical, high-stress opioid overdose rescue situations. Funding ADAPT Pharma, Inc.

Introduction Although physical activity (PA) reduces cardiovascular disease (CVD) risk, physical inactivity remains a pressing public health concern, especially among African American (AA) women in the USA. PA interventions focused on AA women living in resource-limited communities with scarce PA infrastructure are needed. Mobile health (mHealth) technology can increase access to PA interventions. We describe the development of a clinical protocol for a multilevel, community-based, mHealth PA intervention for AA women.Methods and analysis An mHealth intervention targeting AA women living in resource-limited Washington, DC communities was developed based on the socioecological framework for PA. Over 6 months, we will use a Sequential Multi-Assignment, Randomized Trial approach to compare the effects on PA of location-based remote messaging (named ‘tailored-to-place’) to standard remote messaging in an mHealth intervention. Participants will be randomised to a remote messaging intervention for 3 months, at which point the intervention strategy will adapt based on individuals’ PA levels. Those who do not meet the PA goal will be rerandomised to more intensive treatment. Participants will be followed for another 3 months to determine the contribution of each mHealth intervention to PA level. This protocol will use novel statistical approaches to account for the adaptive strategy. Finally, effects of PA changes on CVD risk biomarkers will be characterised.Ethics and dissemination This protocol has been developed in partnership with a Washington, DC-area community advisory board to ensure feasibility and acceptability to community members. The National Institutes of Health Intramural IRB approved this research and the National Heart, Lung, and Blood Institute provided funding. Once published, results of this work will be disseminated to community members through presentations at community advisory board meetings and our quarterly newsletter.Trial registration number NCT03288207.

Tellurium oxides of the ATeO3 form typically do not crystallize in perovskite structures. Here, we show that perovskite-like ATeO3 (A = Ca, Sr, Ba) thin films can be grown on perovskite single-crystal substrates via epitaxial stabilization. These films are stable with high optical bandgaps, low dielectric losses, and a high electric breakdown strength. Hysteretic dielectric behavior found in SrTeO3 and BaTeO3 strongly suggests the presence of antiferroelectricity and ferroelectricity, respectively. These properties make perovskite tellurium oxides possibly appealing candidates for thin film coating or insulator materials in advanced microelectronics. Tellurium oxides constitute a largely unexplored class of materials that might show new and interesting functionalities in epitaxial thin-films. Our work encourages new work within this field. [ABSTRACT FROM AUTHOR]

BackgroundPosttraumatic stress disorder (PTSD) is a prevalent mental health issue among veterans. Access to PTSD treatment is influenced by geographic (ie, travel distance to facilities), temporal (ie, time delay between services), financial (ie, eligibility and cost of services), and cultural (ie, social stigma) barriers. ObjectiveThe emergence of mobile health (mHealth) apps has the potential to bridge many of these access gaps by providing remote resources and monitoring that can offer discrete assistance to trauma survivors with PTSD and enhance patient-clinician relationships. In this study, we investigate the current mHealth capabilities relevant to PTSD. MethodsThis study consists of two parts: (1) a review of publicly available PTSD apps designed to determine the availability of PTSD apps, which includes more detailed information about three dominant apps and (2) a scoping literature review performed using a systematic method to determine app usage and efforts toward validation of such mHealth apps. App usage relates to how the end users (eg, clinicians and patients) are interacting with the app, whereas validation is testing performed to ensure the app’s purpose and specifications are met. ResultsThe results suggest that though numerous apps have been developed to aid in the diagnosis and treatment of PTSD symptoms, few apps were designed to be integrated with clinical PTSD treatment, and minimal efforts have been made toward enhancing the usability and validation of PTSD apps. ConclusionsThese findings expose the need for studies relating to the human factors evaluation of such tools, with the ultimate goal of increasing access to treatment and widening the app adoption rate for patients with PTSD.

Under section “Introduction”, the first sentence in the 4th paragraph was incorrectly published. The correct sentence is given below.