bluuebunny/crossref_metadata_2025 huggingface dataset:
Hepatitis B-Associated Symptomatic Iron Overload, with Complete Resolution after Nucleoside Analogue Treatment
Authors: Tey Tze Tong , Yiu Richard , Leow Wei Qiang
Published: December 2021

Symptomatic iron overload and hyperferritinemia are rarely mentioned as complications of chronic hepatitis B infection. We report a case of a 70-year-old woman who presented with symptoms of iron overload including aches in the calves, fatigue, poor appetite, and low mood. Laboratory results showed a serum ferritin of 2449 μg/L and transferrin saturation of 74%. Her symptoms completely resolved with hepatitis B antiviral treatment. Serum ferritin and transferrin saturation also normalized. Symptomatic iron overload is a rare yet clinically important complication that can result from chronic hepatitis B infection.
Research on Resource Carbon Emission Allocation Efficiency Based on Blockchain Consensus Algorithm
Authors: Yin Menglin
Published: December 2021

This paper takes the secondary low-carbon supply chain composed of a manufacturer and a retailer as the research object and takes the government subsidy strategy of low-carbon supply chain as the research theme, the government invests in the construction of blockchain technology application platform, and supply chain enterprises use blockchain technology for compensation. Under this background, considering consumers’ low-carbon preference and green trust, a three-stage game model dominated by the government and followed by manufacturers and retailers under the four scenarios of emission reduction technology input subsidy and low-carbon product output subsidy before and after the application of blockchain technology is established. By comparing the optimal social welfare, carbon emission reduction rate, and low-carbon product output under the four scenarios, the optimal problem of government low-carbon subsidy strategy is discussed. It is found that when the product of consumers’ low-carbon preference coefficient and green trust coefficient is greater than a certain fixed value, the government can obtain higher social welfare and promote enterprises’ emission reduction through output subsidies. The government can always promote the demand for low-carbon products through output subsidies. When the emission reduction cost coefficient approaches infinity, the demand for low-carbon products when the government implements output subsidies are four times that when the government implements technology subsidies. When the single cycle shared cost of the blockchain platform and the unit cost of enterprise application of blockchain technology are less than a certain threshold, the government’s construction of the blockchain platform can obtain higher social welfare, promote enterprise emission reduction, and improve consumers’ demand for low-carbon products.
Intravenous Dexmedetomidine as an Adjunct to Neuraxial Anesthesia in Cesarean Delivery: A Retrospective Chart Review
Authors: Davis Paul R. , Sviggum Hans P. , Delaney Daniel J. , Arendt Katherine W. , Jacob Adam K. , Sharpe Emily E.
Published: December 2021

Background. Dexmedetomidine is a selective α-2 agonist commonly used for sedation that has been used in obstetric anesthesia for multimodal labor analgesia, postcesarean delivery analgesia, and perioperative shivering. This study evaluated the role of intravenous dexmedetomidine to provide rescue analgesia and/or sedation during cesarean delivery under neuraxial anesthesia. Methods. We conducted a single-center, retrospective cohort study of all parturients undergoing cesarean delivery under neuraxial anesthesia between December 1, 2018, and November 30, 2019, who required supplemental analgesia during the procedure. Patients were divided into two groups: patients who received intravenous dexmedetomidine (Dexmed group) and patients who received adjunct medications such as fentanyl, midazolam, ketamine, and nitrous oxide (Standard group). Primary outcome was incidence of conversion to general anesthesia. Results. During the study period, 107 patients received adjunct medications. There was no difference in conversion to general anesthesia between the Dexmed group and the Standard group (6% (4/62) vs. 9% (4/45);

p
=
0.718

). In the Dexmed group, the mean dexmedetomidine dose received was 37 μg (range 10 to 140 μg). While the use of inotropic/vasopressor medications was common and similar in both groups, there was an increase in the incidence of bradycardia (Dexmed 15% vs. Standard 2%;

p
=
0.042

) but not hypotension (Dexmed 24% vs. Standard 24%;

p
=
1.00

) in the Dexmed group. Conclusion. In patients who required supplemental analgesia for cesarean delivery, those who received dexmedetomidine versus other medications had a similar rate of conversion to general anesthesia, a statistically significant increase in bradycardia, but no difference in the incidence of hypotension.
Inpatient Mortality Among Patients With Acute Respiratory Distress Syndrome at ECMO and Non-ECMO Centers in the United States
Authors: Maine Rebecca G. , Strassle Paula , Orleans Brian , Bryant Mary K. , Raff Lauren , Reid Trista , Charles Anthony
Published: December 2021

Background

A 2009 randomized control trial found patients with severe acute respiratory distress syndrome (ARDS) who transferred to an extra-corporeal membrane oxygenation therapy (ECMO) center had better survival, even if they did not receive ECMO. This study aimed to use a national US database to determine if care at ECMO centers offer a survival advantage in patients with ARDS with mechanical ventilation only.

Methods

Hospitalizations of patients 18-64 years old who had ARDS and mechanical ventilation in the 2010-2016 Health care Cost and Utilization Project National Readmission Database were included. ECMO centers performed at least 1 veno-venous ECMO hospitalization annually; or >5, >20, and >50 on sensitivity analysis. Multivariable logistic regression compared inpatient mortality, after adjusting for timing of hospitalization, patient demographics, comorbidities, and hospital characteristics.

Results

Of the 1 224 447 ARDS hospitalizations and mechanical ventilation, 41% were at ECMO centers. ECMO centers were more likely to be larger, private, non-profit, teaching hospitals. ARDS at admission was more common at non-ECMO centers (31% vs 23%, P < .0001); however, other patient demographics and comorbidities did not differ. After adjustment, no difference in inpatient mortality was seen between ECMO and non-ECMO centers (OR 0.99, 95% CI: 0.97, 1.02). This relationship did not change in sensitivity analyses.

Discussion

Adult patients with ARDS requiring mechanical ventilation may not have improved outcomes if treated at an ECMO center and suggest that early transfer of all ARDS patients to ECMO centers may not be warranted. Further evaluation of ECMO center volume and illness severity is needed.
Prediction of Postoperative Mortality in Patients With Organ Failure Following Pancreaticoduodenectomy
Authors: Li Vivian , Serrano Pablo E.
Published: December 2021

Background

Failure to rescue (FTR) patients with postoperative complications contribute to a significant proportion of postoperative mortality. Our main objective was to determine the risk factors for FTR among patients undergoing pancreaticoduodenectomy who suffered a life-threatening complication requiring intensive care unit (ICU) management.

Materials and Methods

Consecutive patients undergoing pancreaticoduodenectomy from 2011 to 2020 were reviewed retrospectively. Causes of organ failure were described as the one that most commonly contributed to patient’s transfer to ICU or death. Two groups were created based on whether patients had FTR and risk factors for FTR were compared. The impact of baseline characteristics, operative characteristics, and risk scoring on FTR was analyzed using multiple logistic regression.

Results

There were 19/58 (33%) FTR patients. Baseline, operative characteristics, postoperative complications, and length of hospital and ICU stay were similar between groups. However, a higher proportion of FTR patients experienced a postoperative pancreatic fistula (POPF) (16% vs 2.6%, P = .062). Among patients who experienced a POPF, the FTR group had a trend in delayed time from diagnosis to treatment (7 vs 23 hours, P=.131). Renal complications (OR 6.12, 95% CI, 1.23 to 38.43, P = .035) and time from POPF diagnosis to treatment (OR 1.05, 95% CI, 1.00 to 1.11, P = .036) were independent predictors of FTR by multivariable analysis.

Conclusion

The occurrence of certain postoperative complications such as renal complications as well as delayed timing of the management of POPF is predictive of FTR following pancreaticoduodenectomy, especially as delayed timing to treatment is a risk factor for FTR.
Faecal calprotectin is not necessarily required as a screen for significant bowel disease in primary care
Authors: Waite Matthew Malcolm Andrew , Langmead Louise , Ayling Ruth M
Published: December 2021

Objective

NICE recommends measurement of faecal haemoglobin (f-Hb) using faecal immunochemical test (FIT) when colorectal cancer is suspected and calprotectin (f-Cal) in the context of inflammatory bowel disease, though neither is disease specific. During the COVID-19 pandemic, f-Hb has been a requirement prior to referral for endoscopy in England; f-Cal is often performed simultaneously. The aim of this study was to investigate test performance of both tests for significant bowel disease in those patients referred.

Design

All adult patients with simultaneous measurements of f-Hb and f-Cal between April 2019 and September 2020 were included. For those referred, outcomes were determined from clinical records.

Results

650 patients with simultaneous samples for f-Hb an f-Cal were managed in Primary Care; 319 patients were referred to hospital; SBD was found in 32 (10.0%) (CRC 5, high risk adenomas 5, IBD 22). At a cut-off of 10 μg/g for f-Hb and 200 μg/g for f-Cal, the sensitivity, specificity and negative predictive value for diagnosis of SBD were 84.4%, 58.2% and 96.7% and 68.8%, 89.6% and 95.7%, respectively. Performance of both tests would have enabled diagnosis of two more cases of significant, but non-malignant, bowel disease but required over 4% more referrals for investigation.

Conclusion

Use of FIT has become established to assist prioritisation of patients for referral from Primary Care. Whilst introduced specifically for CRC, FIT performs well as a rule out for IBD in Primary Care and the use of f-Cal is not required.
The Development and Validation of the Familial Support of Multiracial Experiences Scale
Authors: Atkin Annabelle L. , Christophe N. Keita , Yoo Hyung Chol , Gabriel Abigail K. , Wu Christine S. ,   The LOVING Study Collaborative
Published: December 2021

The purpose of this study was to develop a measure of familial support of Multiracial individuals’ unique racial experiences to advance the field’s understanding of how familial processes influence Multiracial development. A sample of 422 Multiracial college students (77.7% female, Mage = 20.05) from three different regions of the United States completed the survey. Exploratory factor analysis results suggested a two-factor measure. Multiracial Conscious Support, a 15-item subscale, represented support strategies unique to Multiracial individuals’ experiences of discrimination and identity exploration. The second 7-item subscale, Multiple Heritage Validation, represented validation of membership in multiple racial groups. The factor structure was supported by confirmatory factor analysis findings with a separate sample. Support was found for the reliability and validity of each subscale. This study provides evidence validating the first measure of familial support of Multiracial experiences, highlighting two themes of support addressing unique experiences of being Multiracial, and validating multiple racial group memberships.
Sexual Victimization Involving Solo Female Offenders: A Crime Script Approach
Authors: Chopin Julien , Beauregard Eric , Paquette Sarah
Published: December 2021

This study aims to provide a theoretically grounded analysis of the crime-commission process of solo females involved in sexual offending, using crime scripts. The sample includes 93 cases of sexual assaults perpetrated by female offenders in an extrafamilial context. Latent class analysis was used to identify the scripts involved in female sexual offending as well as to explore the relationship between each step of the crime-commission process. Also, additional variables related to victim, offender, and location characteristics were used to test the external validity of the model. Results suggest four different scripts used by females: Daytime Indoor, Coercive Outdoor, Coercive Indoor, and Nighttime Indoor. Theoretical and practical implications are discussed.
Guiding Attention via a Cognitive Aid During a Simulated In-Hospital Cardiac Arrest Scenario: A Salience Effort Expectancy Value Model Analysis
Authors: Grundgeiger Tobias , Michalek Annabell , Hahn Felix , Wurmb Thomas , Meybohm Patrick , Happel Oliver
Published: December 2021

Objective

To investigate the effect of a cognitive aid on the visual attention distribution of the operator using the Salience Effort Expectancy Value (SEEV) model.

Background

Cognitive aids aim to support an operator during the execution of a task. The effect of cognitive aids on performance is frequently evaluated but whether a cognitive aid improved, for example, attention distribution has not been considered.

Method

We built the Expectancy Value (EV) model version which can be considered to indicate optimal attention distribution for a given event. We analyzed the eye tracking data of emergency physicians while using a cognitive aid application versus no application during a simulated in-hospital cardiac arrest scenario.

Results

The EV model could fit the attention distribution in such a simulated emergency situation. Partially supporting our hypothesis, the cognitive aid application group showed a significantly better EV model fit than the no application group in the first phases of the event, but a worse fit in the last phase.

Conclusion

We demonstrated that a cognitive aid affected attention distribution and that the SEEV model provides the means of capturing these effects. We suggest that the aid supported and improved visual attention distribution in the stressful first phases of a cardiopulmonary resuscitation but may have focused attention on objects that are relevant for lower priority goals in the last phase.

Application

The SEEV model can provide insights into expected and unexpected effects of cognitive aids on visual attention distribution and may help to design better artifacts.
The Two Faces of Opposition to Chemical Weapons: Sincere Versus Insincere Norm-Holders
Authors: Blair Christopher W. , Chu Jonathan A. , Schwartz Joshua A.
Published: December 2021

Prominent research holds that the use of weapons of mass destruction is taboo. But how strong are these norms? Investigating this question among the mass public, we argue that some citizens actually support taboo policies in private but are unwilling to express counter-normative opinions openly due to fear of social sanction. These insincere norm-holders are difficult to identify empirically because they are observationally equivalent to sincere norm-holders in direct-question surveys. To overcome this challenge, we use a list design, which allows survey respondents to indirectly express sensitive opinions. The results from three list experiments show that between 10% and 17% of Americans falsify their preferences over chemical weapons use when asked directly. In an extension, we explore our framework in the realm of nuclear weapons and elite behavior. Our findings advance a specific debate on the strength of weapons taboos, while our conceptualization of insincere norm-holders and methodological application have broader implications for how scholars might think about and measure norms in international politics.
Location and hierarchical allocation disaster with combined ε-constraint and simulation-based optimization approach
Authors: Mousavi Sogol , Sajadi Seyed Mojtaba , AlemTabriz Akbar , Najafi Seyyed Esmaeil
Published: December 2021

The increasing frequency of natural disasters and the necessity of proper planning to minimize the impact and casualties of such crises have always been matters of great concern to human societies. In this study, a hybrid mathematical-simulative location-allocation model is proposed to carry out disaster management (DM) efforts with maximum coverage in the immediate aftermath of an earthquake. The proposed model consists of two phases: determining the optimal location of the temporary emergency stations (TECs), followed by optimal and hierarchical allocation of casualties to said temporary medical centers (TMCs). Given the contradictory nature of the model’s two objectives, that is, minimizing the cost of setting up TMCs and the time taken to transfer casualties to TMC. In the second phase, a simulation-based optimization approach is employed to simulate casualties’ behavior at the onset of the disaster and to determine the optimal capacity of the medical centers. The findings indicate that the costs and distance traveled by casualties during the earthquake have been reduced by 15%.
Navigating Disconnected Social Circles: Experiences and Personal Networks of Latino/a Adolescents in the U.S. Rural South
Authors: Fanfan Dany , D’Ingeo Dalila , Vacca Raffaele , Stacciarini Jeanne-Marie R.
Published: December 2021

Informed by Bronfenbrenner’s ecological model of development, this mixed-methods study’s aims are to: (1) describe rural Latino/a adolescents’ ( N = 62) narratives and lived social experiences in the context of rurality, and (2) examine their personal networks to better understand their social interactions (subset of 30 adolescents). Rural Latino/a adolescents move in limited social circles and experience geographic, cultural, and social isolation due to immigration status problems, socioeconomic issues, racial discrimination, and family dynamics. This limitation is reflected by personal networks that tend to be homogenous in terms of ethnicity, age, and sociodemographic characteristics. School, although characterized by weak social ties often disconnected from community and family contacts, emerged as the dominant context of sociability where adolescents build their social identity outside the circle of dense family ties. Findings suggest a critical need for interventions to reduce isolation and enhance social connectedness between family, school, and rural community in this population.
Racial Regard and Physical Health Among Low-Income Black Caregivers of Children With and Without Asthma
Authors: Holder Rachel L. , Winter Marcia A. , Greenlee Jessica , Robinson Akea , Dempster Katherine W. , Everhart Robin S.
Published: December 2021

The purpose of this study was to examine the associations between child health, parent racial regard, and parent physical health in 87 African American and Black parents/caregivers of children with and without asthma from a low-income, under-resourced urban area. Participants completed the Private and Public Regard subscales of the Multidimensional Inventory of Black Identity (MIBI) and 12-item Short Form Health Survey (SF-12). Parents of children with asthma reported having poorer physical health, while those with higher public and private racial regard reported better physical health. The association between public regard and physical health was surpassed by an interaction of child asthma status and public regard: as public regard decreased, so did physical health, but only for parents raising a child with asthma. Findings suggest that the stresses associated with raising a child with chronic illness and perceiving lower public racial regard may together confer additional risk for poor physical health in African American and Black parents.
The Impact of Ambulatory Dementia Care Models on Hospitalization of Persons Living With Dementia: A Systematic Review
Authors: Hovsepian Vaneh , Bilazarian Ani , Schlak Amelia E. , Sadak Tatiana , Poghosyan Lusine
Published: December 2021

This systematic review presents an overview of the existing dementia care models in various ambulatory care settings under three categories (i.e., home- and community-based care models, partnership between health systems and community-based resources, and consultation models) and their impact on hospitalization among Persons Living with Dementia (PLWD). PRISMA guidelines were applied, and our search resulted in a total of 13 studies focusing on 11 care models. Seven studies reported that utilization of dementia care models was associated with a modest reduction in hospitalization among community-residing PLWD. Only two studies reported statistically significant results. Dementia care models that were utilized in specialty ambulatory care settings such as memory care showed more promising results than traditional primary care. To develop a better understanding of how dementia care models can be improved, future studies should explore how confounders (e.g., stage of dementia) influence hospitalization.
A minor theory of direct action politics and performance in New Orleans’ economic justice movement
Authors: Keegan Caroline
Published: December 2021

In this paper, I develop a minor theory that blurs boundaries between prefigurative direct action and symbolic performance to reconsider strategies for resistance and world-building. Drawing on participant observation and interviews of economic justice organizers and activists in New Orleans in 2015, I examine two events through this minor theory: an immigration reform protest and a collaboratively written skit about income inequality. By emphasizing the performance of protest and the potential for protest through performance, I consider how these events empowered activists to make claims on spaces of the city, develop long-term embodied solidarities, disrupt dominant narratives, and en act more just alternatives. These events took place against the backdrop of intensifying racial and economic inequalities in post-Katrina New Orleans, following a long history of both repression and resistance in the city. Through performance-based direct actions, New Orleans’s economic justice movement moves beyond a reactive politics rooted in outrage and anguish toward a direct action politics constructive of a more just world.
Patient exposure dose in interventional cardiology per clinical and technical complexity levels. Part 1: results of the VERIDIC project
Authors: Feghali Joelle Ann , Delépierre Julie , Belac Olivera Ciraj , Dabin Jérémie , Deleu Marine , De Monte Francesca , Dobric Milan , Gallagher Aoife , Hadid-Beurrier Lama , Henry Patrick , Hršak Hrvoje , Kiernan Tom , Kumar Rajesh , Knežević Željka , Maccia Carlo , Majer Marija , Malchair Françoise , Noble Stéphane , Obrad Davor , Sans Merce Marta , Sideris Georgios , Simantirakis George , Spaulding Christian , Tarantini Giuseppe , Van Ngoc Ty Claire
Published: December 2021

Background

Patients can be exposed to high skin doses during complex interventional cardiology (IC) procedures.

Purpose

To identify which clinical and technical parameters affect patient exposure and peak skin dose (PSD) and to establish dose reference levels (DRL) per clinical complexity level in IC procedures.

Material and Methods

Validation and Estimation of Radiation skin Dose in Interventional Cardiology (VERIDIC) project analyzed prospectively collected patient data from eight European countries and 12 hospitals where percutaneous coronary intervention (PCI), chronic total occlusion PCI (CTO), and transcatheter aortic valve implantation (TAVI) procedures were performed. A total of 62 clinical complexity parameters and 31 technical parameters were collected, univariate regressions were performed to identify those parameters affecting patient exposure and define DRL accordingly.

Results

Patient exposure as well as clinical and technical parameters were collected for a total of 534 PCI, 219 CTO, and 209 TAVI. For PCI procedures, body mass index (BMI), number of stents ≥2, and total stent length >28 mm were the most prominent clinical parameters, which increased the PSD value. For CTO, these were total stent length >57 mm, BMI, and previous anterograde or retrograde technique that failed in the same session. For TAVI, these were male sex, BMI, and number of diseased vessels. DRL values for Kerma-area product ( PKA), air kerma at patient entrance reference point ( Ka,r), fluoroscopy time (FT), and PSD were stratified, respectively, for 14 clinical parameters in PCI, 10 in CTO, and four in TAVI.

Conclusion

Prior knowledge of the key factors influencing the PSD will help optimize patient radiation protection in IC.
Effects of a group music-based intervention in improving attachment and psychosocial adaptation in adolescents with parental attachment insecurity: A randomized trial
Authors: Chen Chen-Jung , Chen Yi-Chang , Lee Mei-Yin , Wang Chih-Hung , Chang Li-Chuan , Chen Mei-Feng
Published: December 2021

The effects of a group music-based intervention on attachment and psychosocial adaptation in adolescents with parental attachment insecurity were examined in Taiwan. A randomized controlled trial with a pre–post and follow-up design was performed. The music group ( N = 28) attended a 40-min session twice weekly for 10 weeks. The nonmusic group ( N = 28) received health education. The groups underwent a parental attachment and psychosocial adaptation assessment before and after the music intervention and at the 1-week follow-up. The results were analyzed using paired-samples t-tests and a mixed analysis of variance. Fifty-four participants completed both the pre- and posttests and were included in the final data analysis. The interaction effect was statistically significant, parental attachment, F(1.07, 25.81) = 8.18, p < .005, η2 = .14; and psychosocial maladaptation, F(1.30, 31.93) = 8.01, p < .01, η2 = .13, scores, implying a successful intervention. A significant difference in the postintervention parental attachment, F(1.03, 25.81) = 19.19, p < .001, and psychosocial maladaptation, F(1.28, 31.93) = 14.22, p < .001, scores was found between the music and nonmusic groups. The present study confirmed that group music-based interventions may effectively improve adolescents’ parental attachment and mitigate their psychosocial maladaptation.
Fixed-Time Traffic Control at Superstreet Intersections by Bee Colony Optimization
Authors: Jovanović Aleksandar , Teodorović Dušan
Published: December 2021

The superstreet intersection (or restricted crossing U-turn-, J-turn intersection) fixed-time traffic control system was developed in this study. The optimal (or near-optimal) values of cycle length, splits, and offsets were discovered by minimizing the experienced travel time of all network users traveling through the superstreet intersection. The optimization procedure used was based on the bee colony optimization (BCO) metaheuristic. The BCO is a stochastic, random-search, population-based technique, inspired by the foraging behavior of honey bees. The BCO belongs to the class of swarm intelligence methods. A set of numerical experiments was performed. Superstreet intersection configurations that allowed direct left turns from the major street, as well as configurations with no direct left turns, were analyzed within numerical experiments. The obtained results showed that BCO outperformed the traditional Webster approach in the superstreet geometrical configurations considered.
Highway Safety Manual Calibration: Estimating the Minimum Required Sample Size
Authors: Rajabi Mahdi , Gerard Patrick , Ogle Jennifer
Published: December 2021

Crash frequency has been identified by many experts as one of the most important safety measures, and the Highway Safety Manual (HSM) encompasses the most commonly accepted predictive models for predicting the crash frequency on specific road segments and intersections. The HSM recommends that the models be calibrated using data from a jurisdiction where the models will be applied. One of the most common start-up issues with the calibration process is how to estimate the required sample size to achieve a specific level of precision, which can be a function of the variance of the calibration factor. The published research has indicated great variance in sample size requirements, and some of the sample size requirements are so large that they may deter state departments of transportation (DOT) from conducting calibration studies. In this study, an equation is derived to estimate the sample size based on the coefficient of variation of the calibration factor and the coefficient of variation of the observed crashes. Using this equation, a framework is proposed for state and local agencies to estimate the required sample size for calibration based on their desired level of precision. Using two recent calibration studies, South Carolina and North Carolina, it is shown that the proposed framework leads to more accurate estimates of sample size compared with current HSM recommendations. Whereas the minimum sample size requirement published in the HSM is based on the summation of the observed crashes, this paper demonstrates that the summation of the observed crashes may result in calibration factors that are less likely to be equally precise and the coefficient of the variation of the observed crashes can be considered instead.
Collective Perceptions of Aging and Older Persons Held by Students From Eight Healthcare Professions
Authors: Fisher Kelly , Watson Jennifer , Willis Jada L. , Hawley Diane , Severance Jennifer , Butler Carroll Traci , Jackson Lynn
Published: December 2021

In order to increase the number of students entering the geriatric workforce, an understanding of factors influencing career preference and what may prevent students from pursuing geriatric careers is necessary. Using a convergent parallel mixed methods approach, the aim of this study was to provide insight for geriatric educators regarding the collective perceptions of aging and older persons held by 864 students from eight healthcare professions. Quantitative questions assessed students’ attitudes (Geriatric Attitudes Scale). Student responses to four open-ended questions were assessed using conventional content analysis. Results included rich narrative examples of healthcare professions students’ perceptions and understanding of the aging process, as well as myths and misconceptions of aging and older persons that can be used to inform geriatric curricula across multiple health professions training and education programs. Geriatric education is a critical avenue to correct misperceptions, quell ageism and address the current shortage in the geriatrician workforce.
The Effects of Three Instructor Participatory Roles on a Small Group’s Collaborative Concept Mapping
Authors: Ouyang Fan , Xu Weiqi
Published: December 2021

Collaborative concept mapping, as one of the widely used computer-supported collaborative learning (CSCL) modes, has been used to foster students’ meaning making, problem solving, and knowledge construction. Previous empirical research has used varied instructional scaffoldings and has reported different effects of those scaffoldings on collaboration. To further examine the effects of instructional scaffoldings, this research implements three different instructor participatory roles (i.e., cognitive contributor, group regulator, and social supporter) to support online collaborative concept mapping (CCM). We use multiple learning analytics methods to examine the group’s CCM processes from the social, cognitive, and metacognitive dimensions, supplemented with assessments of the concept maps. The research reveals different effects of three instructor participatory roles on the group’s collaborative behaviors, discourses, and performances. When the instructor engaged as a cognitive contributor, the student group achieved a lowly-interactive, low-level metacognitive engagement and behavior-oriented knowledge construction; when the instructor engaged as a group regulator, the student group achieved a socially-balanced, high-level metacognitive engagement and behavior-communication-interrelated knowledge construction; and when the instructor engaged as a social supporter, the student group achieved a highly-interactive, medium-level metacognitive engagement and communication-oriented knowledge construction. Based on the results, this research proposed pedagogical, analytical, and theoretical implications for future empirical research of CSCL.
If They Only Disrespect Us a Little, and the Story is Interesting, I Keep Watching: Navigation of Ethnic Media Gratifications by Latino Teens
Authors: Martins Nicole , Gonzales Amy , Mastro Dana
Published: December 2021

The goal of this study was to apply insights from social identity gratifications and ethnic/racial identity development frameworks to better understand how adolescents perceive, select, and avoid media content which has the potential to damage self-and group-concept. We conducted focus groups with 32 Latino adolescents aged 13 to 15. We found mixed evidence that youth prioritized the ethnicity of characters in program selection. Most referenced personality or age as the primary identity-based factors of interest. Although students widely recognized negative stereotypes of Latinos in mainstream English-language media, this did not overwhelmingly dictate media choices, seemingly due to lack of alternative choices. In contrast, Spanish language programming offered a positive alternative to English-language media and may serve identity needs. The theoretical and practical implications are discussed.
“We’re All Equal” But Not Really: Perceptions of Racial Inequity Among Racial-Ethnic Minoritized Youth in the U.S
Authors: Kiang Lisa , Martin Romero Michelle Y. , Coard Stephanie I. , Gonzalez Laura G. , Stein Gabriela L.
Published: December 2021

Racial-ethnic inequity is deeply entrenched in U.S. social systems, yet adolescents’ voices and understanding around inequity are not often directly examined. The current qualitative study uses focus group data from African American ( n = 21), Chinese- ( n = 17), Indian- ( n = 13), and Mexican- ( n = 17) origin adolescents ( Mage = 12.93 years; SD = 1.23; 51% boys) to provide insight on how youth navigate their attitudes and beliefs about these issues. Using a racial-ethnic socialization lens, we explore proximal (e.g., parents, peers, teachers) and distal (e.g., media, society) ways in which adolescents come to understand racial-ethnic inequity. Three themes characterized adolescents’ discussions. School diversity, of peers and of thought, and messages around egalitarianism were two prominent influences on their perceptions. A third theme related to perceptions of social hierarchies, which appeared to be shaped by stereotypes, peer interactions, and ideas about inequity itself. Emergent themes suggest that the school context is a particularly salient social setting that encompasses multiple sources of socialization (e.g., teachers, classmates, academics, climate), and parents, peers, and the media also play prominent roles.
White College Students’ Racial Prejudice and Perceptions of Racial Hate Crime
Authors: Woo Bongki , Pitner Ronald , Wilson Betty
Published: December 2021

This study investigated how racial prejudice influences White college students’ perceptions of hate crime. We also examined the moderating effects of the race of the victim of hate crimes and the absence of hate crime laws. Our sample included 581 White students in a predominantly White university located in a state that does not have a hate crime law. The study was set up in a 2 (race of the victim and the perpetrator) × 3 (level of assault) factorial design. Participants rated their perceptions of three scenarios (i.e., non-racially biased simple assault, racially biased simple assault, and racially biased aggravated assault). The dependent variables were perceptions of hate crime and willingness to report. The key independent variable was participants’ level of racial prejudice. The moderators included race of the victim in each scenario and whether participants’ state of origin has a hate crime law. Results suggest that higher levels of modern racism were associated with lower perceptions of hate crime and lower willingness to report racially biased simple and aggravated hate crime. When the victim was White, participants with higher levels of racial prejudice were more likely to perceive a hate crime and more willing to report it. The opposite was true when the victim was Black. The absence of state hate crime laws and race of victim were significant moderators. Our study suggests that racial prejudice is associated with lower perceptions of hate crime and willingness to report. Furthermore, the moderating effect of the race of victims provides insights on how racial prejudice can lead to a differential perception of hate crime, depending on whether one’s racial in-group is targeted. Our findings also highlight the importance of having state-level hate crime laws to mitigate the linkage between modern racism and perceptions of hate crime.
QAnon—Religious Roots, Religious Responses
Authors: MacMillen Sarah Louise , Rush Timothy
Published: December 2021

Conspiracy theories are not new to religion, nor an exclusively modern phenomenon. But they take on more destructive and wide-ranging impact with modern communication technologies. Looking at the root psychosocial mechanisms of conspiracy theories, we argue that they frame ideas, history, and culture through the cognitive mindscape of special, ‘hidden knowledge’. They also serve as a unifying theory of conflict and narration of history. The COVID epidemic has strained the economic and political system. Although it may be a matter of perception for Q-followers, a sense of precarity is enhanced by QAnon, thus unleashing and mustering an awakening for such extremist paranoid discourse of ressentiment. This parallels the cognitive mindscape of ‘the Great Replacement’. Prior to election 2020, QAnon’s base had been growing in Evangelical communities. Its presence continues to be felt.
A Retrospective Case Series of Concomitant Carbapenem and Valproic Acid Use: Are Best Practice Advisories Working?
Authors: Fratoni Andrew J. , Colmerauer Jessica L. , Linder Kristin E. , Nicolau David P. , Kuti Joseph L.
Published: December 2021

Background: A Best Practice Advisory (BPA) warns clinicians of an interaction between carbapenems and valproic acid (VPA) that can cause significant declines in VPA levels leading to serious consequences for patients treated for seizure disorder and unknown implications for alternative indications. Objective: The goal of this study was to assess BPA efficacy in avoiding concomitant VPA/carbapenems, and to characterize use of these agents, clinical implications, and potential alternative therapeutic options. Methods: Retrospective chart review was performed on all patients over the course of 1 year who were concomitantly prescribed a carbapenem and VPA at Hartford Hospital, Hartford, CT. Data collected included: level of care, duration of concomitant therapy, indications, VPA levels during or surrounding overlap, documentation of the interaction, and therapeutic implications. Results: Carbapenems and VPA were administered to 591 and 625 patients, respectively; the BPA fired 126 times in 24 patients, and 15 patients were initiated on these agents concomitantly. Eight (53%) patients received VPA for seizures. The remaining seven (47%) received VPA for alternative indications. Eight of nine VPA levels were sub-therapeutic during carbapenem therapy and polypharmacy was administered in all patients receiving VPA for non-convulsive indications. Conclusion: Co-prescribing of these drugs was rare; however, the BPA was ineffective in 63% of instances. Reductions in VPA efficacy for any indication should be expected with concomitant carbapenem administration. Antibiotics other than carbapenems should be considered when coverage of multidrug resistant Gram-negative pathogens is required in patients whose VPA treatment cannot be interrupted or switched to a therapeutic alternative.
Modeling the pressure strain correlation in turbulent flows using deep neural networks
Authors: Panda Jyoti P , Warrior Hari V
Published: December 2021

The pressure strain correlation plays a critical role in the Reynolds stress transport modeling. Accurate modeling of the pressure strain correlation leads to the proper prediction of turbulence stresses and subsequently the other terms of engineering interest. However, classical pressure strain correlation models are often unreliable for complex turbulent flows. Machine learning–based models have shown promise in turbulence modeling, but their application has been largely restricted to eddy viscosity–based models. In this article, we outline a rationale for the preferential application of machine learning and turbulence data to develop models at the level of Reynolds stress modeling. As an illustration, we develop data-driven models for the pressure strain correlation for turbulent channel flow using neural networks. The input features of the neural networks are chosen using physics-based rationale. The networks are trained with the high-resolution DNS data of turbulent channel flow at different friction Reynolds numbers (Reλ). The testing of the models is performed for unknown flow statistics at other Reλ and also for turbulent plane Couette flows. Based on the results presented in this article, the proposed machine learning framework exhibits considerable promise and may be utilized for the development of accurate Reynolds stress models for flow prediction.
Analytical calculation models for mesh stiffness and backlash of spur gears under temperature effects
Authors: Lu Ruxin , Tang Wencheng
Published: December 2021

The temperature has a great contribution to the mesh stiffness and backlash of the gear pair. Presence of thermal deformation caused by temperature will complicate the gear teeth interaction. In this paper, the thermal time-varying stiffness model and thermal time-varying backlash model are proposed with the consideration of tooth profile error and total thermo-elastic deformation consists of the teeth deformation, teeth contact deformation, and gear body-induced deformation. The key parameters of thermo-elastic coupling deformation affected by temperature are calculated. Based on the proposed models, the influencing mechanism of temperature on the tooth profile error, mesh stiffness, total deformation, and backlash are revealed. The effects of shaft radius and torque load on the thermal stiffness and thermal backlash are studied. The proposed thermal stiffness and backlash calculation model are proven to be more comprehensive and the correctness is validated.
Inertial measurement unit–based cricket stroke improviser using polynomial kernel support vector machines
Authors: Nithya N , Nallavan G
Published: December 2021

Wearable devices have now become virtual assistants, and the sports industry also aims in technological integration. The objective of this research article is to introduce a wearable device to detect and record the movement of a cricket player during his training session. The designed system collects the displacement and rotational information through a combination of accelerometer and gyroscope placed on the cricket bat. We propose a data-driven machine learning model which takes raw analog data as input for classifying the strokes. The algorithm used is the polynomial support vector machine, a supervised classification algorithm with 300 independent variables to enable accurate and real-time stroke classification. The system has a dedicated user interface for accessing these real-time details. This wearable embedded system does not require any cloud services as the complex analyses are performed in the processor itself. The player and the coach can get visual reference support, and the mistakes can be corrected during the training period itself. The device can detect the arm action of a cricket player with a success rate of 97%. The hardware is powered using a 10,000 mAh rechargeable battery.
A new calculation formula to describe the dynamic pressure of water jet peening with elliptical nozzle for high-efficiency treatment
Authors: Zheng Hong-Xiang , Luo Yun , Zhang Bao-Zhu , Jiang Wen-Chun , Tu Shan-Tung
Published: December 2021

Water jet peening is a good potential method to control welding residual stresses. The water jet with elliptical nozzle can improve the treatment efficiency due to its large treatment area. In this article, the water jet velocity and dynamic pressure for different elliptical nozzle dimensions and standoff distances are discussed by numerical simulation. The results show that when the axial distance is 10 mm, the effective impact diameter of the elliptical nozzle a/b=8–12 is about 2 times or more than that of the circular nozzle. The length of the jet core of the elliptical nozzle is only related to the outlet structure and is independent of the inlet pressure. The correlation between the dimensionless core length of the elliptical water jet and its long and short axes is derived. When the ratio of the major axis to the minor axis is between 7 and 13, the core length of the elliptical water jet is 7–7.5 times that of its minor axis. Combining the suitable treatment area and dynamic pressure, the elliptical nozzle with an axis ratio of 8 is recommended to control the welding residual stress. Finally, a new formula for calculating dynamic pressure distribution is proposed for the elliptical nozzle water jet at different stages.
Dobbing: Australia’s favourite emergency pastime
Authors: Bond Catherine
Published: December 2021

While ‘dobbing’ is arguably viewed negatively, this behaviour has been on the rise during the COVID-19 pandemic. Drawing on examples from the First World War and the pandemic, this article argues that this increased activity is typical of the Australian community during emergencies, facilitated by extensive legal frameworks that encourage this type of reporting.
Loneliness Level and Its Associated Factors in Patients With Hemodialysis
Authors: Pallone Joice Marques , Santos Diana Gabriela Mendes dos , Oliveira Dias Ana Laura , Ferreira Layana Giselly Silva , Costa da Silva Cleanderson , Orlandi Fabiana de Souza
Published: December 2021

The purpose of this study was to examine the level of loneliness and its relationship with socioeconomic and health conditions, social support, family functionality, and depressive symptoms in patients undergoing hemodialysis. This cross-sectional study involved analysis of a secondary data, collected in 2019 among 80 patients with CKD on hemodialysis. Participants completed the following instruments: socio-demographic, economic, and health condition characterization, UCLA Loneliness Scale, Medical Outcomes Study Social Support Scale, Patient Health Questionnaire-9, and the Family APGAR. On average, the sample was mostly female (55%), white (65%), and the mean age was 59.63 years. In the perception of loneliness, the highest index was (55%), moderately high. Social support scored the worst in the Positive Social Interaction domain. The prevalance of severe depression was approximately 29%. Family functioning was positive, with a good score (69%). There was a weak negative correlation between loneliness and all domains of Social Support, besides Family Functioning.