Search

Background: The rates of obesity among patients undergoing total knee arthroplasty (TKA) have substantially increased. In addition, obesity is a well-established risk factor for complications after TKA. The purpose of this study was to analyze trends in body mass index (BMI) and complication risk among obese patients undergoing primary TKA treated at a single institution over 3 decades. Methods: Utilizing an institutional total joint registry, 13,919 primary TKAs performed to treat osteoarthritis between 1990 and 2019 were identified. Patients were stratified by BMI according to the World Health Organization (WHO) classification into 3 groups: non-obese (BMI, <30 kg/m2), WHO Class-I and II obese (BMI, 30 to 39.9 kg/m2), and WHO Class-III obese (BMI, ≥40 kg/m2). Trends in BMI and survivorship free from reoperation, revision, and periprosthetic joint infection (PJI) were analyzed over time while controlling for age, sex, and the Charlson Comorbidity Index. Results: Over the study period, there was a 90% increase in the prevalence of Class-II obesity (13% to 25%) and a 300% increase in Class-III obesity (3% to 12%). Analysis of the entire cohort demonstrated a decrease in the 2-year risk of any reoperation, any revision, and PJI (p < 0.05 for all) with time. The risk decreased significantly over time for non-obese patients for any reoperation (p = 0.029) and any revision (p = 0.004) and for Class-III obese patients for any reoperation (p = 0.038) and any revision (p = 0.012), but it remained stable for Class-I and II obese patients. The risk of PJI decreased from 1990 to 2019 for non-obese patients (p = 0.005), but there were no significant changes in PJI risk for any obesity group. Conclusions: Despite increasing rates of obesity among our patients who underwent TKA, we observed decreasing risks of reoperation, revision, and PJI over time. The risks of reoperation and revision declined among non-obese patients, remained stable for Class-I and II obese patients, and declined for Class-III obese patients. The PJI risk declined for non-obese patients over the study period, but no such decline occurred for any category of obesity. Despite the decreasing risks of reoperation and revision, further work is needed to improve PJI risk in obese patients. Level of Evidence: Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence. [ABSTRACT FROM AUTHOR]

Background: Attaining a good quality of life (QOL) is a priority for people living with HIV (PLHIV). We explored the interaction between QOL and the associated demographic, behavioural and clinical factors for PLHIV attending an outer-metropolitan clinical setting in Western Sydney, Australia. The clinic's cohort of PLHIV is characterised by relatively high proportions of women, heterosexual men, and patients from culturally and linguistically diverse (CALD) communities. Methods: We assessed QOL using the PozQol tool that is specifically designed for PLHIV. QOL scores and de-identified socio-demographic and clinical data were extracted from the electronic and paper medical records of PLHIV who completed a PozQol tool (September 2020–March 2022). We performed descriptive analyses and logistic regression to identify associations. Results: Among 188 patients, there were 77.7% men, 21.3% women, 1.1% transwomen; 67.0% were born overseas, 85.1% spoke English, 84.4% were Medicare-eligible, 85.9% were employed, 58.5% were diagnosed with HIV 6–20 years ago, and 33.0% within the past 5 years. Overall, 58.0% had a high or very high QOL. A low score in any domain was associated with Medicare-ineligibility. Low QOL scores in specific domains were associated with the following factors: health (being born overseas, having partners of both sexes), psychological (unemployment, having a mental health condition, having a viral load >20 copies/mL), social (unemployment), and functional (Medicare-eligibility, unemployment, having a viral load >20 copies/mL). Conclusions: The PozQol tool has enhanced understanding of factors impacting on QOL for PLHIV attending our service in Western Sydney. Identifying patients with low QOL scores allows targeted clinical interventions to improve QOL, and re-alignment of clinical services to better support PLHIV. Quality of life (QOL) is an important priority for people living with HIV (PLHIV). Using a patient-reported outcome measure (PozQol tool), we found that 58% of PLHIV reported a high or very high QOL, and socio-demographic factors such as Medicare-ineligibility and unemployment were associated with lower QOL scores. PozQol may assist services by enhancing understanding of QOL among PLHIV, guide local and national policy, health service provision, and promote empowerment of individuals to better understand their own QOL. [ABSTRACT FROM AUTHOR]

Magnetic nanoparticles (MNPs) are used extensively across numerous disciples, with applications including Magnetic Particle Imaging (MPI), targeted hyperthermia, deep brain stimulation, immunoassays, and thermometry. The assessment of MNPs, especially those being designed for MPI, is performed with magnetic particle spectrometers, relaxometers, loop tracers, or similar devices. Despite the many applications and the need for particle assessment, there are few consolidated resources for designing or building such a MNP assessment system. Here, we describe the design and performance of an open-source device capable of spectroscopy, relaxometry, and loop tracing. We show example measurements from the device and quantify the detection sensitivity by measuring a dilution series of Synomag-D 70 nm (from 0.5 mg Fe/ml to 7 ng Fe/ml) with a 10 mT drive field at 23.8 kHz. The device measures 260 pg Fe with SNR = 1 and 1.3 ng at SNR = 5 in spectroscopy mode in under one second of measurement time. The system has a dynamic range of 60 μg to 260 pg Fe without changing the hardware configuration. As an example application, we characterize Synomag-D's relaxation time constant for drive fields 2–18 mT and compare the magnetization responses of two commonly used MNPs. [ABSTRACT FROM AUTHOR]

In this qualitative study, 10 White school counselors were interviewed after they completed a 7-week affinity group designed to address their racial identity development, cultural humility, and antiracist school counseling practice. We conducted two semistructured interviews with each participant and analyzed them using interpretive phenomenological analysis. The analysis revealed five group experiential themes: (a) motivation for joining the affinity group, (b) affinity group experiences, (c) outcomes from the affinity group, (d) antiracism's influence on identity, and (e) antiracist school counseling practice. We discuss implications for the school counselor preparation, induction, and practice. [ABSTRACT FROM AUTHOR]

In this qualitative study, 10 White school counselors were interviewed after they completed a 7-week affinity group designed to address their racial identity development, cultural humility, and antiracist school counseling practice. We conducted two semistructured interviews with each participant and analyzed them using interpretive phenomenological analysis. The analysis revealed five group experiential themes: (a) motivation for joining the affinity group, (b) affinity group experiences, (c) outcomes from the affinity group, (d) antiracism's influence on identity, and (e) antiracist school counseling practice. We discuss implications for the school counselor preparation, induction, and practice. [ABSTRACT FROM AUTHOR]

Every school counselor must be fully prepared to build homeplace and Black Joy in K-12 education. For white school counselors, this requires an ongoing personal and professional commitment to cultural humility and racial identity development. Affinity groups can be an opportunity for white school counselors to develop cultural humility, racial identity, and prepare to thoughtfully engage in antiracist action with their larger school communities. In this article, we use our experience in facilitating and researching affinity groups for school counselors to provide recommendations for implementation. [ABSTRACT FROM AUTHOR]

Mental health factors can impact student academic performance and success. Student mental health concerns such as depression and anxiety and are a growing concern within P‐12 school systems. The dual pandemics of COVID‐19 and racial injustice have increased concerns about student mental health and exacerbated existing traumas particularly for students from marginalized populations. Trauma‐informed interventions that promote mental health in schools may be useful. Researchers utilized Consensual Qualitative Research to identify student mental health needs and outcomes for the implementation a deep breathing intervention in several schools in a large metropolitan city. The reasons for implementation, anticipated outcomes, reactions to intervention, perception of impact, and related personal experiences, as well as implications for practice and research, are all discussed. Practitioner points: All educators would benefit from understanding students' general social, emotional, and mental needs and how they may impact learning, especially since the onset of the COVID19 pandemic.Prioritizing mental health in the classroom, even with a brief and simple intervention, can help students regulate emotions and prepare them for, or transition them from learning.Short breathing exercises can be implemented at no or low cost, take up a few minutes of classroom time, and eventually be integrated into a routine and led by students. [ABSTRACT FROM AUTHOR]

Coronal mass ejections (CMEs) are energetic releases of large‐scale magnetic structures from the Sun. CMEs can have impacts on spacecraft and at Earth. This trajectory is typically assumed to be radial, but often the CME moves outward with some spatial offset from the source region where the eruption initially occurred. A CME is frequently accompanied by a prominence eruption, a movement of cool, dense material up into the corona that can be ejected or fall back down. We investigate eruptions in which some portion of the prominence material falls back to the Sun along field lines which have reconfigured in the eruption, rather than draining back to the source or escaping with the CME. Using a method called persistence mapping, 304 Å images from the Solar Dynamics Observatory (SDO), and coronagraph images from the Solar and Heliospheric Observatory, we measure and compare the offsets in latitude of 20 CMEs and their respective prominences with respect to the source region. The 20 events were chosen to sample over the first 10 years of the SDO mission. We find that the offsets are correlated. We find no difference between eruptions offset toward the equator or the poles, suggesting that the offset is a result of local changes in the eruptive field, rather than of the Sun's global magnetic field structure. These findings help us contextualize individual eruptions and highlight changes in the local magnetic field associated with the prominence eruption. Plain Language Summary: Solar eruptions can have impacts on spacecraft and at Earth. We investigate two components of solar eruptions: the coronal mass ejection (CME), which is an energetic release of large‐scale magnetic structure from the Sun, and partially erupted prominence material (PEPM) that falls back to the Sun along changing magnetic field lines during the eruption. For multiple eruptions, we measure and compare the offset in latitude of both the CME and PEPM from the source region where the eruption originated. We find that the two offsets are correlated, indicating that the changing magnetic field topology impacts both of these components. These findings can help us contextualize individual eruptions and highlight the changing local magnetic field. Key Points: We examine the motion of partially erupted prominence material (PEPM) and coronal mass ejection (CME) relative to eruptive source locationWe find a correlation between the offsets in latitude from the source locationPEPM can be a predictor of CME direction relative to source region and highlight evolving magnetic topology [ABSTRACT FROM AUTHOR]

This replication study examines the relationship between school counselor leadership and school counseling program implementation, but with a larger sample and additional measures of leadership. In the original study (Mason, 2008) using Kouzes and Posner's Leadership Practices Inventory (2003), only Model the Way and Enable Others to Act subscales were predictors of program implementation, while in this study all subscales were predictors. The findings extend prior research, specifically that school counselor transformational leadership behavior strongly predicted comprehensive school counseling program implementation. We also found that specific leadership practices and behaviors, including modeling and systematic collaboration, accounted for the greatest variance in program implementation. Finally, exposure to the American School Counselor Association's ASCA National Model and working in a Recognized ASCA Model Program (RAMP) predicted program implementation. We discuss the implications of the findings with respect to today's educational climate. [ABSTRACT FROM AUTHOR]

Complex oxides such as tin-doped indium oxide (ITO) are widely utilized as transparent conductors in a variety of functional devices. Typically, they are fabricated by sputtering, which often requires additional annealing to achieve high transparency and conductivity. Using pulsed laser deposition (PLD), both high transparency and high conductivity have been achieved without annealing, using instead selected gas species and pressures. However, the relative roles of Stranski-Krastanov-like and vapor-liquid-solid (VLS) growth modes during morphological transitions remain controversial. Here, we report on PLD of ITO in an inert-gas environment, identifying the role of plasma-plume expansion in the selection of VLS vs vapor-solid (VS) growth. For the lowest N2 pressure, indium-tin droplet formation, followed by self-catalyzed VLS growth, is observed. With increasing N2 pressure, a transition from VLS to VS growth is apparent. It is hypothesized that oxygen scattering at the lowest N2 pressure induces a metal-rich plume, which leads to metal droplet formation, followed by VLS growth. As the N2 pressure is increased, the plasma-plume and its metal-rich core are compressed, resulting in a transition to VS growth. This tunable compression of the plasma-plume offers a route to the morphological design of a wide range of functional complex oxide devices with tunable optical and electronic performance. [ABSTRACT FROM AUTHOR]

Some researchers interested in assessing moral reasoning among business practitioners or students have developed their own vignettes or scenarios set in business contexts, based on assumptions that the situations presented in the often-used Defining Issues Test (DIT) will somehow be inappropriate for these specific types of respondents. This paper is the first to examine in depth both the actual details contained in these business-oriented scenarios and empirical findings emerging from them. Among this paper's conclusions are: (1) assumptions underpinning the presumed superiority of business-oriented vignettes have yet to be tested; (2) the DIT possesses considerable advantages unavailable in alternative measures; (3) many business-oriented scenarios have underlying Dilemma themes that seem inherently ambiguous and thus of questionable relevance for assessing moral reasoning; (4) these scenarios have no obvious equivalent in the DIT and thus cannot definitively be placed under the umbrella of the latter's demonstrated construct validity; and (5) meaningful empirical findings have not clearly emerged from investigations using business-oriented vignettes. In light of these conclusions, we recommend that investigators interested in moral reasoning advance knowledge in a coherent and unified way by using the DIT that seems entirely appropriate for use among respondents with business experience or training. Although alternative measures may have value for assessing ethical judgments, evidence of their validity as a measure of moral reasoning is lacking. [ABSTRACT FROM AUTHOR]

Background: There are limited data on the incidence of capitellar osteochondritis dissecans (OCD) in the United States (US) population. Purpose: To determine the incidence of symptomatic capitellar OCD in a representative US subpopulation and identify changes in its incidence over time and to investigate the relationship between the incidence of capitellar OCD and patient sex and age. Study Design: Descriptive epidemiology study. Methods: A retrospective review was performed of patients aged ≤24 years from Olmsted County, Minnesota, with symptomatic capitellar OCD over a 25-year period (1995-2019). Patients with acute osteochondral injuries, Panner disease, and hereditary arthropathy were excluded. Poisson regression was utilized to identify the predictors of a capitellar OCD diagnosis. Incidence rates (per 100,000) were assessed for changes over time. Age groups of younger (10-15 years) versus older (16-24 years) patients were compared. Results: A total of 45 patients (78% male) were identified. The mean age was 14.5 years (range, 10-24 years); 31 patients were in the younger group, and 14 patients were in the older group. Sport participation was seen in 89%of patients; 90% were overhead athletes, and 58% were throwing athletes. The incidence of capitellar OCD was 6.0 per 100,000 overall, 9.5 per 100,000 for male patients, and 2.6 per 100,000 for female patients. The incidence was highest for male patients in the younger group (15.3/100,000) and lowest for female patients in the older group (0.8/100,000). The estimated incidence rate ratio for younger versus older patients was 3.3 (P <.001), and the incidence rate ratio for male versus female patients was 3.5 (P <.001). There were no changes in the incidence of capitellar OCD over time as a continuous or 5-year categorical variable (P =.290 and P =.460, respectively). Overall, 82% of patients were treated surgically. There were no significant changes in surgical rates over time. Conclusion: In this US subpopulation, the overall incidence of symptomatic capitellar OCD between the ages of 10 and 24 years was 6.0 per 100,000 over the 25-year period studied, which is higher than previously reported US estimates. Incidence rates and treatment strategies did not change significantly over time. [ABSTRACT FROM AUTHOR]

Nitrous oxide, a potent greenhouse gas, is a common labour analgesic. One method which may reduce its carbon footprint is to 'crack' the exhaled gas into nitrogen and oxygen using catalytic destruction. In this quality improvement project, based on environmental monitoring and staff feedback, we assessed the impact of nitrous oxide cracking technology in the maternity setting. Mean ambient nitrous oxide levels were recorded during the final 30 minutes of uncomplicated labour in 36 cases and plotted on a run chart. Interventions were implemented in four stages, comprising: stage 1, baseline (12 cases); stage 2, cracking with nitrous oxide delivered and scavenged via a mouthpiece (eight cases); stage 3, cracking with nitrous oxide via a facemask with an air-filled cushion (eight cases); stage 4, cracking with nitrous oxide via a low-profile facemask, and enhanced coaching on the use of the technology (eight cases). The median ambient nitrous oxide levels were 71% lower than baseline in stage 2 and 81% lower in stage 4. Staff feedback was generally positive, though some found the technology to be cumbersome; successful implementation relies on effective staff engagement. Our results indicate that cracking technology can reduce ambient nitrous oxide levels in the obstetric setting, with potential for reductions in environmental impacts and occupational exposure. [ABSTRACT FROM AUTHOR]

Control of a perturbed satellite formation antenna array, with dual quaternion dynamics, is considered. The perturbations and their derivatives are assumed bounded with unknown bounds. The objective of this article is to employ continuous control algorithms which feature adaptive gain nonoverestimation. In this work, three novel dual quaternion-based adaptive continuous sliding mode control algorithms to control a perturbed satellite antenna array are assessed. These methods of adaptive sliding mode control are caspable of handling coupled perturbed systems, such as dual quaternion models. The efficacy of the proposed algorithms is verified via simulations and comparison to the available traditional PD Plus controller and classical sliding mode control methods. [ABSTRACT FROM AUTHOR]

The development of the first microfluidic paper-based analytical device (µPAD) for the speciation of inorganic arsenic in environmental aqueous samples as arsenite (As(III)) and arsenate (As(V)) which implements hydride generation on a paper platform is described. The newly developed µPAD has a 3D configuration and uses Au(III) chloride as the detection reagent. Sodium borohydride is used to generate arsine in the device's sample zone by reducing As(III) in the presence of hydrochloric acid or both As(III) and As(V) (total inorganic As) in the presence of sulfuric acid. Arsine then diffuses across a hydrophobic porous polytetrafluoroethylene membrane into the device's detection zone where it reduces Au(III) to Au nanoparticles. This results in a color change which can be related to the concentration of As(III) or total inorganic As (i.e., As(III) and As(V)) concentration. Under optimal conditions, the µPAD is characterized by a limit of detection of 0.43 mg L−1 for total inorganic As (As(III) + As(V)) and 0.41 mg L−1 for As(III) and a linear calibration range in both cases of 1.2–8.0 mg As L−1. The newly developed µPAD-based method was validated by applying it to groundwater and freshwater samples and comparing the results with those obtained by conventional atomic spectrometric techniques. [ABSTRACT FROM AUTHOR]

Anticyclonic mesoscale eddies are often observed in the Balearic Sea (BS) toward the end of summer and autumn. In some years, these eddies become strong and persistent, modifying the local water mass properties. In this study, we analyze two of the most significant recent long‐lived anticyclonic eddies, occurring in 2010 and 2017, using data from a high‐resolution circulation model, altimetry and satellite‐borne sea surface temperature observations. These eddies lasted around 2 and 4 months, respectively, with a radius varying between 40 and 75 km. The generation and intensification mechanisms of these long‐lived anticyclonic eddies are studied by means of (a) energy conversion terms associated with eddy‐mean flow interaction and (b) model sensitivity tests. Results show that these eddies were formed and intensified through mixed barotropic and baroclinic instabilities. The former are produced under the action of intense northwesterly (NW) winds. The latter are related to the existence of an intense summer thermal front between the BS and the Gulf of Lion, and to northward inflows of relatively lower salinity waters. Both the wind events and the presence of the thermal front are necessary for the formation of the eddies. The intensification process varied between both events. While in 2010 it was driven by significant salinity gradients produced by northwards inflows, in 2017 it was produced by additional intense NW winds. Both long‐lived anticyclonic eddies created long‐lasting surface temperature anomalies up to 2.5°C, which have characteristics of local marine heatwaves. Plain Language Summary: Eddies are closed circular currents present in the oceans. They are important phenomena due to their capacity to isolate water masses, retain floating particles and modify ocean circulation. In the Western Mediterranean Sea there is a recognized area of anticyclonic eddy presence between Barcelona and the Balearic Islands, especially during late summer. Specifically, in 2010 and 2017 two such eddies were identified with lifetimes of 2 and 4 months, respectively. In this paper, we investigate why these eddies were so long and persistent in comparison with other years. Results confirm that these eddies are generated as a result of northwesterly (NW) winds events blowing over an area with two water masses of different temperature. In 2010, low salinity northward water inflows sustained this eddy during two months, while in 2017 the eddy remained active for a period of four months under the influence of additional intense NW winds. Both eddies created long‐lasting surface temperature anomalies, in particular in 2017, the sea surface temperature within the eddy influence area was 2.5°C warmer in comparison to other years. Key Points: Northwesterly (NW) wind events and the existence of the Pyrenees thermal front are both necessary for the formation of strong long‐lived Balearic Sea eddiesEddy intensification was driven by salinity gradients in 2010 and by additional NW wind events in 2017Both events created long‐lasting surface temperature anomalies that have the characteristics of local marine heatwaves [ABSTRACT FROM AUTHOR]

Cardiac excitation-contraction coupling requires dyads, the nanoscopic microdomains formed adjacent to Z-lines by apposition of transverse tubules and junctional sarcoplasmic reticulum. Disruption of dyad architecture and function are common features of diseased cardiomyocytes. However, little is known about the mechanisms that modulate dyad organization during cardiac development, homeostasis, and disease. Here, we use proximity proteomics in intact, living hearts to identify proteins enriched near dyads. Among these proteins is CMYA5, an under-studied striated muscle protein that co-localizes with Z-lines, junctional sarcoplasmic reticulum proteins, and transverse tubules in mature cardiomyocytes. During cardiac development, CMYA5 positioning adjacent to Z-lines precedes junctional sarcoplasmic reticulum positioning or transverse tubule formation. CMYA5 ablation disrupts dyad architecture, dyad positioning at Z-lines, and junctional sarcoplasmic reticulum Ca2+ release, leading to cardiac dysfunction and inability to tolerate pressure overload. These data provide mechanistic insights into cardiomyopathy pathogenesis by demonstrating that CMYA5 anchors junctional sarcoplasmic reticulum to Z-lines, establishes dyad architecture, and regulates dyad Ca2+ release. Heart muscle cells exhibit exquisitely organized subcellular features that enable efficient and coordinated heart muscle contraction, but little is known about how it is achieved. Here the authors show that CMYA5 organizes cardiomyocyte calcium release units and aligns them to sarcomeres, leading to abnormal calcium release, cardiac dysfunction, and inability to tolerate pressure overload, when absent. [ABSTRACT FROM AUTHOR]

The CM carbonaceous chondrites are an important resource in our efforts to understand the role of volatiles in the formation of planetary systems. We report the bulk mineralogy, water abundance, and infrared (IR) reflectance spectra of the CM chondrites LaPaz Icefield (LAP) 04514, LAP 04796, LAP 04565, and LAP 02333. They contain abundant Fe‐ and Mg‐rich serpentines (~70–80 vol%), and based on their phyllosilicate fractions, we classify LAP 04514, LAP 04796, and LAP 04565 as petrologic subtype 1.6 and LAP 02333 as 1.4. This is consistent with estimated water abundances of 9.9 (±1.1) wt% for LAP 04796, 10.4 (±0.1) wt% for LAP 04565, and 11.5 (±0.5) wt% for LAP 02333. However, LAP 04514 contains less water (8.8 ± 0.3 wt%), has a shallower 3 µm band depth, and lacks tochilinite having experienced posthydration temperatures of ~300–400 °C. We conclude that LAP 04514, LAP 04796, and LAP 04565 are among the least altered CM chondrites, which retain primitive features from the initial building blocks of the CM parent body. Finally, we use the IR spectral features of LAP 04514, LAP 04796, and LAP 04565 to identify C‐complex asteroid surfaces that record mild levels of hydration. [ABSTRACT FROM AUTHOR]

Definitions of what constitutes evidence-based practice (EBP) are often debated across disciplines, including school counseling. The Ronald H. Fredrickson Center for School Counseling Outcome Research and Evaluation (CSCORE) offers a research coding protocol to determine EBPs. This protocol was used in this review to evaluate select school counseling intervention research studies (N = 13) in the social emotional domain. Results revealed that none of the identified interventions met all criteria of the protocol and confirmed the persistent issues of research quality in school counseling intervention research. However, the variable strengths and limitations of the research included in this review may be worth considering in the context of school counseling theory to practice. Implications regarding the state of intervention research and EBPs in school counseling are discussed. [ABSTRACT FROM AUTHOR]

The career development needs of school-aged African American Male (AAM) students require advocacy from school counselors. Such advocacy must extend from direct group intervention with students to include group work on behalf of students. The authors propose using the ACA Advocacy Competencies as a guide to using group work as advocacy that extends to the community/school and public arena levels. A case study demonstrates how school counselors can apply the competencies and related strategies, and the authors offer relevant recommendations. [ABSTRACT FROM AUTHOR]

Our understanding of the evolved, rapidly rotating, magnetically active, and apparently single FK Comae stars is significantly hindered by their extreme rarity: only two stars in addition to FK Com itself are currently considered to be members of this class. Recently, a sample of more than 20 candidate FK Comae type stars was identified within the context of the Kepler–Swift Active Galaxies and Stars (KSwAGS) survey. We present an analysis of high-resolution Stokes V observations obtained using ESPaDOnS@CFHT for 8 of these candidates. We found that none of these targets can be considered members of the FK Comae class based primarily on their inferred rotational velocities and on the detection of spectroscopic binary companions. However, 2 targets show evidence of magnetic activity and have anomalously high projected rotational velocities (v sin  i) relative to typical values associated with stars of similar evolutionary states. EPIC 210426551 has a |$v\sin {i}=209\, {\rm km\, s}^{-1}$|⁠ , an estimated mass of |$1.07\, \mathrm{ M}_\odot$|⁠ , and, based in part on its derived metallicity of [M/H] = −0.4, it is either an evolved main sequence (MS) star or a pre-MS star. KIC 7732964 has a mass of |$0.84\, \mathrm{ M}_\odot$|⁠ , lies near the base of the red giant branch, and exhibits a |$v\sin {i}=23\, {\rm km\, s}^{-1}$|⁠. We find that these two objects have similar characteristics to FK Com (albeit less extreme) and that their rapid rotation may be inconsistent with that predicted for a single star evolutionary history. Additional observations are necessary in order to better constrain their evolutionary states and whether they have short-period binary companions. [ABSTRACT FROM AUTHOR]

In Ethics Position Theory, relativism is the degree to which people believe that universal moral rules should not always be applied unwaveringly. Researchers often predict that highly relativistic individuals are characterized by questionable ethics given their ostensible self‐interested "anything goes" approach. Corroborating evidence for such predictions, however, remains elusive. This paper suggested that high relativists are perhaps not unethical, and reviewed four decades of relevant literature in order to clarify the meaning and implications of the relativism construct. The portrait of relativism that emerged is often contrary to prevalent expectations. Relativistic individuals seem tolerant of ambiguity, open to experience, non‐authoritarian, accepting of others with different backgrounds and lifestyles, and troubled by injustice. No persuasive evidence of questionable ethics is available. These findings have profound implications for managerial practice and suggest that highly relativistic employees may be among the most valuable. Future research grounded in an understanding of what relativism is rather than what it should be has the potential to allow a deeper understanding of this important construct to emerge. We also explore possible reasons why an inaccurate narrative about relativistic orientations may have emerged and persisted among both researchers and people generally. [ABSTRACT FROM AUTHOR]

Copyright of Wildlife Monographs is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We present the results of our photometric and spectroscopic follow-up of the intermediate-luminosity optical transient AT 2017jfs. At peak, the object reaches an absolute magnitude of Mg = −15.46 ± 0.15 mag and a bolometric luminosity of 5.5 × 1041 erg s−1. Its light curve has the double-peak shape typical of luminous red novae (LRNe), with a narrow first peak bright in the blue bands, while the second peak is longer-lasting and more luminous in the red and near-infrared (NIR) bands. During the first peak, the spectrum shows a blue continuum with narrow emission lines of H and Fe II. During the second peak, the spectrum becomes cooler, resembling that of a K-type star, and the emission lines are replaced by a forest of narrow lines in absorption. About 5 months later, while the optical light curves are characterized by a fast linear decline, the NIR ones show a moderate rebrightening, observed until the transient disappears in solar conjunction. At these late epochs, the spectrum becomes reminiscent of that of M-type stars, with prominent molecular absorption bands. The late-time properties suggest the formation of some dust in the expanding common envelope or an IR echo from foreground pre-existing dust. We propose that the object is a common-envelope transient, possibly the outcome of a merging event in a massive binary, similar to NGC 4490−2011OT1. [ABSTRACT FROM AUTHOR]

Two distinct and perhaps mutually exclusive understandings of utilitarianism have emerged in the ethics literature. Utilitarianism is typically regarded as an approach to determine ethicality by focusing on whether or not actions produce the greater good, but has also been conceptualized as a set of traits to which individuals might be predisposed. This paper is designed to clarify the meaning and implications of such utilitarian traits as "results-oriented," "innovative," and "a winner." Although the Janus-headed model of ethical theory from which these traits emerged had been acknowledged by its developer as possibly misrepresenting typical views of utilitarianism, much research using these traits appears to have been conducted without clear recognition of this. If the conceptual foundation underpinning hypothesis development is disconnected from the measure used to test them, then little support for relevant predictions should emerge. A review of the literature which featured utilitarian traits generally confirmed this. This paper also explored the origins and emergence of these traits and suggested that existing evidence that these measure utilitarian ethical predispositions is not especially persuasive. Understanding what utilitarian traits do not assess is critical in order for knowledge about this potentially useful measure to advance. [ABSTRACT FROM AUTHOR]

Moral reasoning typically relates unexpectedly weakly with both Machiavellianism and authoritarianism. Although researchers often explain this by pointing to apparent shortcomings in both the construct and the measure of moral reasoning, such explanations are questionable given the many instances of support for hypotheses involving moral reasoning using the same construct and measure. As these latter cannot only sometimes be flawed, we explored the possible influence of moral reasoning index choice on observed results by using multiple indices available in the Defining Issues Test (DIT). In a sample of 201 employed persons surveyed in 1998, with results reported for the first time, advanced moral reasoners tended to be neither Machiavellian nor authoritarian. However, the specific moral reasoning index employed was critical to detecting these hypothesized inverse relationships. Specifically, we proposed (and determined) that currently unavailable D scores would be the relevant index for examining inverse relationships with Machiavellianism and that P scores would be most appropriate in the context of inverse relationships with authoritarianism, particularly among persons inclined to utilize their characteristic moral reasoning (assessed with U scores). We extrapolate the conceptual logic underpinning such relationships, and suggest that appropriate index choice flows from this logic and is essential to hypothesis testing across a broad array of constructs. Future research could adopt this logic to examine relationships involving constructs with implications similar to those found in Machiavellianism and authoritarianism. [ABSTRACT FROM AUTHOR]

The amount and type of suggested training to accomplish expertise in a chosen sport has largely remained an issue of contention among parents, coaches and researchers with many questioning whether children should specialise early (12 years old or before) in a single sport or diversify in a range of activities/sports before specialising at a later age (13 years old or above). The review examined the effects of early specialisation on athlete development, in particular examining physical and cognitive development. Ultimately, answering the question 'does being too specific at or before the age of 12 years old produce good youth athletes but poor adult athletes?'. The Ovid Database, Edith Cowan Database, Journal of Australian Strength and Conditioning and Google Scholar were searched using key words. A total of 10 articles were included in the review, with 3 long-term studies tracking junior athletes through to adulthood. It was reported that specialising after 12 years old was more beneficial for athlete development and the child's ability to reach elite/national competition level. Additionally, athletes that specialised before 12 years old may have limited their long term development or dropped out of the sport before achieving their physiological peak. In conclusion, parents, coaches and health practitioners must be educated on the best practices for youth athlete development. A training approach that follows the long-term athletic development (LTAD) framework may be encouraged for incorporating a careful structure of practice and play throughout various stages of child development. [ABSTRACT FROM AUTHOR]

The complex structure of the vertical velocity field inside an anticyclonic eddy located just south of the Canary Islands is analyzed through a high-resolution ocean model. Based on the flow divergence, vertical velocity is decomposed into various forcing components. The analysis reveals that advection and stretching of vorticity are the most important forcing contributions to the vertical velocity within the eddy. In the mixed layer, a small-scale multipolar vertical velocity pattern dominates. This is the result of vertical mixing effects that enhance the surface vertical velocity by increasing the ageostrophic velocity profile. As a result, an ageostrophic secondary circulation arises that acts to restore thermal-wind balance, inducing strong vertical motions. Nonlinear Ekman pumping/suction patterns resemble the small-scale vertical velocity field, suggesting that nonlinear Ekman effects are important in explaining the complex vertical velocity, despite an overestimate of its magnitude. In the eddy thermocline, the vertical velocity is characterized by a dipolar pattern, which experiences changes in intensity and axisymmetrization with time. The dipolar vertical velocity distribution arises from the imbalance between the advection and stretching of the vorticity forcing terms. A vertical velocity dipole is also obtained by solving a generalized omega equation from density and horizontal velocity fields, which also shows a preponderance of the ageostrophic term. The ubiquity of dipolar vertical velocity distributions inside isolated anticyclones is supported by recent observational findings in the same oceanic region. [ABSTRACT FROM AUTHOR]

A perturbation correction term for the effect of attraction forces on the equation of state is calculated and combined with previous statistical-mechanical analytical equations of state proposed by Song and Mason and by Ihm, Song, and Mason. The major effect of the correction on the p–v isotherms occurs in the metastable and unstable regions (the ‘‘van der Waals loops’’), with the result that the vapor pressures and orthobaric densities predicted from the Maxwell equal-area construction are greatly improved in accuracy. Comparison is made with experimental data for 13 selected nonpolar fluids (Ar, Kr, Xe, N2, O2, CO2, CH4, C2H6, C3H8, n-C4H10, i-C4H10, C2H4, and benzene) and one slightly polar fluid (toluene). Densities in the stable region of the p–v–T surface are accurate to about 1%–2% in the dense fluid region, and to better than 1% in the low-density gas region; the accuracy is slightly better than that achieved without the perturbation correction. Vapor pressures are predicted with an accuracy of about 2%, with orthobaric densities that are accurate to about 2% for the saturated vapor and to better than 1% for the saturated liquid. As usual for analytical equations of state, the critical region is described less accurately. In principle, the entire fluid equation of state and its vapor–liquid phase boundaries can be calculated from the intermolecular potential plus a few liquid densities. If the potential is not known, measurements of the second virial coefficient as a function of temperature can be used instead; in the absence of any such measurements, the calculation can use as input only the critical temperature, the critical pressure, and the Pitzer acentric factor, with only slight loss of accuracy. Comparison is also made with several widely used empirical equations of state. The present equation of state can be extended to include mixtures, but numerical computations on mixtures are... [ABSTRACT FROM AUTHOR]

Potential energy curves for the three lowest states of HeNe+(X 2Σ1/2+,A1 2Π3/2,A2 2Π1/2) are determined from a combination of mobility and spectroscopic measurements, in conjunction with a theoretical expression giving the A1 curve in terms of the X and A2 curves plus the energy splitting between the 2P3/2 and 2P1/2 states of Ne+. The results are also consistent with measurements of the scattering of beams of fast Ne+ ions by He gas. The best available ab initio potentials give mobilities in poor agreement with experiment, largely because of poor predictions of the positions of the potential minima. It is also shown that, contrary to initial expectations, mixture formulas for mobility based on simple momentum-transfer theory are valid for open-shell systems with multiple interaction potentials. Illustrative calculations are given for the mobility of Ne+ in a He+Ne mixture; both HeNe+ and Ne2+ have multiple potentials. [ABSTRACT FROM AUTHOR]

Mobilities of O+ and O- ions in He gas have been measured as a function of electric field strength at temperatures from 93 to 568 K. The results are compared with previous work, and analyzed in terms of a temperature-field strength scaling rule and the O+–He and O-–He potentials. Emphasis is placed on how much information on the potentials can be obtained from simple features of the mobility curve without extensive numerical computation. [ABSTRACT FROM AUTHOR]

Ab initio potentials for the X 2Σ+1/2, A1 2Π3/2, and A2 2Π1/2 states of ArHe+ are tested as to their ability to describe swarm measurements of gaseous ion transport coefficients. Also tested are potentials based on spectroscopic measurements and model potentials chosen specifically so as to match the transport data. Ar+-ion velocity distributions in a drift tube containing a helium buffer are calculated from the potentials that best match the mobility data, by solution of the Boltzmann kinetic equation. The velocity distributions are used with estimated cross sections for the charge-transfer reaction Ar++N2 to calculate the effects upon the rate coefficients when the distribution differs from a Maxwell–Boltzmann form. The results indicate that the corrections are small at high buffer gas temperatures (293 K and above) and low to moderate electric-field strengths, but become larger at low temperature (82 K) and high fields. The smallness of the corrections confirms that previous rate coefficient measurements in a drift tube show a dependence of the Ar++N2 reaction upon the rotational temperature of N2. [ABSTRACT FROM AUTHOR]

We present a new strong principle of corresponding states that reduces the entire pressure–volume–temperature (p–v–T) surface of a nonpolar fluid to a single curve; this curve corresponds to an effective pair distribution function at contact as a function of reduced density. This reduction of a surface to a curve is based on statistical-mechanical theory, which also furnishes the algorithms for calculating, from the intermolecular pair potential, the three temperature-dependent parameters needed for the reduction. If the pair potential is not known, data on the second virial coefficient as a function of temperature can be used instead. The principle is tested on a computer-simulated Lennard-Jones (12,6) fluid, on the noble-gas fluids (except He), on N2, CO2, CF4, SF6, and on the first four alkanes. A suitable reciprocal plot yields virtual straight lines for all the real fluids, which differ in shape from the expected Carnahan–Starling curve that describes the (12,6) fluid; we suggest that these shape differences are caused by many-body forces in the real fluids. By curve fitting straight lines to the empirical data for the real fluids, we obtain a simple analytic equation of state, cubic in the density, that can be characterized by three constants: the Boyle temperature, the Boyle volume, and a slope constant. This equation is not accurate in the nonanalytic critical and two-phase regions, but otherwise describes the volumetric behavior of nonpolar fluids very accurately over the entire range from the dilute gas to the dense liquid. It has considerable predictive power, since it permits the construction of the entire p–v–T surface from just the second virial coefficient plus a few liquid densities. [ABSTRACT FROM AUTHOR]

A universal scaling scheme is developed for closed-shell interactions. The exchange energies (total energies minus the Coulombic energies) are found to scale with two parameters to universal interaction curves for noble gas–noble gas, alkali ion–noble gas, and halogen ion–noble gas interactions. The interaction potentials constructed from the universal interaction curves agree well with experimentally determined potentials, and also successfully reproduce measured ion mobilities and diffusion coefficients. The universal interactions can be viewed not just as a correlation scheme, but also as operating to extend the range of the potentials for a number of ion–atom systems to both larger and smaller distances than are presently probed by direct measurements. They also provide the basis for predictions of potentials for systems lacking experimental measurements. In the case of the noble gases, they reduce by two the number of parameters required for the formulation of an accurate extended principle of corresponding states. [ABSTRACT FROM AUTHOR]

We present an analytical equation of state based on statistical-mechanical perturbation theory for hard spheres, using the Weeks–Chandler–Andersen decomposition of the potential and the Carnahan–Starling formula for the pair distribution function at contact, g(d+), but with a different algorithm for calculating the effective hard-sphere diameter. The second virial coefficient is calculated exactly. Two temperature-dependent quantities in addition to the second virial coefficient arise, an effective hard-sphere diameter or van der Waals covolume, and a scaling factor for g(d+). Both can be calculated by simple quadrature from the intermolecular potential. If the potential is not known, they can be determined from the experimental second virial coefficient because they are insensitive to the shape of the potential. Two scaling constants suffice for this purpose, the Boyle temperature and the Boyle volume. These could also be determined from analysis of a number of properties other than the second virial coefficient. Thus the second virial coefficient serves to predict the entire equation of state in terms of two scaling parameters, and hence a number of other thermodynamic properties including the Helmholtz free energy, the internal energy, the vapor pressure curve and the orthobaric liquid and vapor densities, and the Joule–Thomson inversion curve, among others. Since it is effectively a two-parameter equation, the equation of state implies a principle of corresponding states. Agreement with computer-simulated results for a Lennard-Jones (12,6) fluid, and with experimental p–v–T data on the noble gases (except He) is quite good, extending up to the limit of available data, which is ten times the critical density for the (12,6) fluid and about three times the critical density for the noble gases.As expected for a mean-field theory, the prediction of the critical constants is only fair, and of the critical exponents is... [ABSTRACT FROM AUTHOR]

Data on the internal pressure of hard-sphere and hard-disk fluids have been available for some time from computer simulations, even at densities above the freezing density. These results for the metastable fluids suggest that the pressure diverges at the density of random closest packing. However, our examinations of these data indicates that the divergence is characterized by a fractional exponent. We show that incorporating this nonanalyticity not only enables us to construct a semiempirical equation of state which is accurate at densities well beyond that of the Carnahan–Starling equation of state, but it enables us to predict a finite entropy at random closest packing. We also show that this kind of thermodynamic singularity implies that the direct correlation function becomes infinitely long ranged with a critical exponent remarkably similar to the percolation exponent. Given the difficulties inherent in simulating hard spheres at such densities, however, we do suggest that these findings be regarded with some caution. [ABSTRACT FROM AUTHOR]

A simple model is presented that describes the complex behavior of the magnetic field dependence of the thermal conductivity of a polyatomic gas as a function of the Knudsen number. The model treats the solid surface as one component of a gas mixture, and a first-order Chapman–Enskog solution is adequate to account for the thermomagnetic effects in single gases. The results provide an interpolation scheme between the continuum and Knudsen regimes, in the form of scaling rules in which the Knudsen number appears in the coefficients and arguments of the functions that describe the limiting cases. Good agreement is obtained with the available experimental data, and leads to the conclusion that different surface accommodation coefficients are needed for the translational and internal energies of the gas molecules. This conclusion is consistent with analysis of independent field-free conductivity data, and with independent vibrating-surface measurements. [ABSTRACT FROM AUTHOR]

Combination rules for dispersion coefficients are greatly extended by way of a parameter corresponding to an effective number of equivalent electrons, the same parameter N that appears in the Slater–Kirkwood formula for the dipole–dipole coefficient. The same N can be used for all members of an isoelectronic sequence, and new formulas are given for higher-order two-body dispersion coefficients and three-body nonadditive coefficients, in which the same N can also be used. The only additional input data needed are static multipole polarizabilities. A theoretical justification is given using screening-constant wave functions. Extensive empirical testing suggests that the results are usually accurate within about 5% for dipole coefficients and about 5%–10% for higher coefficients. The results apply only to S-state atoms and ions, but should be capable of extension to other systems. [ABSTRACT FROM AUTHOR]