bluuebunny/crossref_metadata_2025 huggingface dataset:
Bringing Advances in Elder Abuse Research Methodology and Theory to Evaluation of Interventions
Authors: Lachs Mark , Mosqueda Laura , Rosen Tony , Pillemer Karl
Published: February 2021

The elder abuse field needs high-quality intervention research to assess the best strategies to combat the problem, but few such studies exist. Significant advances have been made in elder abuse research methodology, measurement, justice theory, and other relevant areas, which may remedy this gap. Particular advances include the use of elder abuse severity measures and goal attainment scaling, and the application of restorative justice theory to intervention. Elder abuse research also may benefit from advances in biomedical clinical trial methodology, including characterizing and following up with subjects excluded from trials or those who drop out, estimating numbers needed to treat to assess cost-effectiveness, and a priori stopping rules for when an intervention proves quickly beneficial or harmful. In this article, we argue these advances can and should inform elder abuse intervention research, propose a theoretical framework to guide such efforts, and demonstrate how this framework can inform practice, using elder abuse multidisciplinary teams and nursing home shelters as examples.
Feasibility study of the unit pricing system for household wastes sorting in the context of China
Authors: Li Wenhua , Wang Juntao
Published: February 2021

Although sanitary household waste disposal was achieved in China, an efficient source separation system has not been built yet. The Unit Pricing System has been proved effective for household waste sorting by developed countries and regions, while rare developing countries have successfully introduced the system in their local context. The study, taking an interactive perspective of dominant factors of residents’ waste sorting and governments’ intervention, combines theoretical analysis with system simulation to dissect the evolution process of residents’ waste sorting and local governments’ Unit Pricing System policy making, and to provide a Unit Pricing System policy making tool to support policy implementations. The results suggest introducing a Unit Pricing System can significantly push ahead the household waste sorting behaviour for cities with relatively low initial status of environmental awareness, and immediately trigger sorting behaviours for cities with higher initial status of environmental awareness. The study can also benefit other developing countries when imposing waste sorting management instruments.
Performance of an anaerobic plug-flow reactor treating agro-industrial wastes supplemented with lipids at high organic loading rate
Authors: Eftaxias Alexandros , Georgiou Dimitrios , Diamantis Vasileios , Aivasidis Alexandros
Published: February 2021

This study evaluated the performance of a plug-flow reactor (PFR) for high-rate anaerobic co-digestion of complex agro-industrial wastes and used cooking oil or animal fat. The PFR was successfully operated up to an organic loading rate (OLR) of 21 g L−1 d−1, yielding biogas at 0.35 L g−1 chemical oxygen demand (COD) influent. During the study period, supernatant COD at the PFR effluent remained between 4 and 7 g L−1, with negligible volatile fatty acids’ concentrations (<500 mg L−1) and no presence of foaming incidents. The biomass concentration inside the PFR, expressed as total suspended solids, remained between 30 and 60 g L−1. Moreover, the above-mentioned anaerobic digestion technology has been currently scaled-up at 50 m3 PFR, while a full-scale facility of 240 kW-el is under construction in the region of north-eastern Greece.
It’s Not All the Same: Implemented and Perceived HR Practices in the Volunteer Context
Authors: Walk Marlene , Scott Charity , Littlepage Laura
Published: February 2021

Being strategic and intentional in the management of volunteers is increasingly important to tackle volunteer retention and improve other volunteer outcomes. Drawing on strategic human resource management (SHRM), this inductive study utilizes qualitative data from interviews to explore how volunteers in a large youth organization perceive HR practices of training and recognition. Volunteer accounts are supplemented with focus group data from front-line staff to capture how HR practices are implemented. Findings indicate a disconnect between implemented and perceived HR practices in some, but not all, areas. Inconsistent and unintentional communication was the main driver for negative volunteer perceptions.
Examining the Effects of a Pedagogical Agent With Dual-Channel Emotional Cues on Learner Emotions, Cognitive Load, and Knowledge Transfer Performance
Authors: Ba Shen , Stein David , Liu Qingtang , Long Taotao , Xie Kui , Wu Linjing
Published: February 2021

Despite the continuous emphasis on emotion in multimedia learning, it was still unclear how pedagogical agent emotional cues might affect learning. In the present study, a between-subjects experiment was performed to examine the effects of a pedagogical agent with dual-channel emotional cues on learners' emotions, cognitive load, and knowledge transfer performance. Participants from a central Chinese university (age mean = 21.26, N = 66) were randomly divided into three groups. These groups received instructions from an affective pedagogical agent, a neutral pedagogical agent, or a neutral voice narration without pedagogical agent embodiment. Results showed that learners assigned the affective pedagogical agent reported a significantly higher emotional level than learners assigned the neutral pedagogical agent. Learners’ perceived task difficulty was not significantly different among groups while instructional efficiency was significantly higher for learners with the affective pedagogical agent. Moreover, learners assigned to the affective pedagogical agent performed significantly better on the knowledge transfer test than those assigned the neutral pedagogical agent or the neutral voice.
A Timely Call to Arms: COVID-19, the Circadian Clock, and Critical Care
Authors: Haspel Jeffrey , Kim Minjee , Zee Phyllis , Schwarzmeier Tanja , Montagnese Sara , Panda Satchidananda , Albani Adriana , Merrow Martha
Published: February 2021

We currently find ourselves in the midst of a global coronavirus disease 2019 (COVID-19) pandemic, caused by the highly infectious novel coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Here, we discuss aspects of SARS-CoV-2 biology and pathology and how these might interact with the circadian clock of the host. We further focus on the severe manifestation of the illness, leading to hospitalization in an intensive care unit. The most common severe complications of COVID-19 relate to clock-regulated human physiology. We speculate on how the pandemic might be used to gain insights on the circadian clock but, more importantly, on how knowledge of the circadian clock might be used to mitigate the disease expression and the clinical course of COVID-19.
Exclusive Breastfeeding Moderates the Association Between Prenatal and Postpartum Depression
Authors: Figueiredo Bárbara , Pinto Tiago Miguel , Costa Raquel
Published: February 2021

Background

Exclusive breastfeeding has a wide range of benefits for maternal health. However, the benefit of exclusive breastfeeding for maternal mental health needs to be further explored.

Research Aim

To determine the moderating role of exclusive breastfeeding at 3 months on the association between prenatal and postpartum depression.

Methods

This study had a prospective, longitudinal, and comparative design with two groups and three assessment waves. The sample comprised 334 participants (70 depressed and 264 non-depressed) recruited at public health services in northern Portugal. Participants completed a measure of depression symptoms between the second and the third trimester of pregnancy and between 3 and 6 months, and a measure of breastfeeding status at 3 months.

Results

Exclusive breastfeeding at 3 months moderated the association between prenatal and postpartum depression. Participants with prenatal depression who were exclusively breastfeeding at 3 months showed fewer symptoms of depression and lower rates of depression between 3 and 6 months postpartum, compared to participants with prenatal depression who were not exclusively breastfeeding. Participants without prenatal depression who were exclusively breastfeeding at 3 months showed similar depression symptoms and similar rates of depression between 3 and 6 months postpartum, compared to participants without prenatal depression who were not exclusively breastfeeding.

Conclusion

Exclusive breastfeeding has a potential protective influence on postpartum depression among women with prenatal depression. Public health policies targeting women with prenatal depression should be implemented and include practices to promote and support exclusive breastfeeding in order to enhance women’s exclusive breastfeeding and mental health.
A Case Study Supporting Lack of SARS-CoV-2 Spread to a 3-Month Old Infant Through Exclusive Breastfeeding
Authors: Liu Wei , Liu Yujie , Liu Zhenjun , Hong Changxin , Liu Jian , Luo Sihui , Zheng Xueying
Published: February 2021

Introduction

During the Coronavirus Disease 2019 global pandemic, maternal and newborn wellbeing has received much attention. Detailed reports of infected women breastfeeding their infants are uncommon. Due to incomplete information available, full data about those infants’ outcomes are lacking, and evidence of infectivity through breastfeeding has not been documented.

Main Issue

Here, we report about a mother who breastfed her infant until she was confirmed with the SARS-Cov-2 infection. After follow-up, we have confirmed that the infant, who was breastfed by the infected mother, was not infected.

Methods

A 33-year-old woman gave birth to a full-term male infant on November 8, 2019. Since birth, she had been exclusively breastfeeding the baby until she was confirmed with the SARS-Cov-2 infection on February 8, 2020. She was hospitalized, isolated from her baby, and stopped breastfeeding. Even though she remained asymptomatic, her milk was expressed using a breast pump and discarded. The mother’s milk sample was collected on February 9, 2020, and the result of the nucleic acid test for COVID-19 was negative. Her infant was asymptomatic and remained virus negative. Her laboratory findings and chest Computed Tomography imaging was normal. She was treated according to the national protocol with aerosolized interferon α2β, lopinavir/ritonavir and ribavirin. Her serum SARS-CoV-2 specific antibodies(IgG and IgM) tested positive when discharged. She returned to breastfeeding after discharge.

Conclusion

Our findings suggest that breastfeeding may be less of a risk than anticipated. Additional research is needed to explore this possibility.
Profiles of Calling and Their Relation to University-to-Work Transition Outcomes
Authors: Zhang Chunyu , Hirschi Andreas , Li Mengzhu , You Xuqun
Published: February 2021

In this study, we adopted a person-centered approach using latent profile analysis to explore whether profiles of calling based on the internal and external sources of a calling are identified and how these profiles relate to successful university-to-work transition outcomes (i.e., higher career satisfaction, higher person-job fit, and lower turnover intentions). We assessed a sample of 684 Chinese university graduates 1 week before and 6 months after graduation and found five profiles of calling: strongly undeveloped calling, moderately undeveloped calling, transcendent calling, highly transcendent calling, and modern calling. We found that a calling that was driven by internal and external sources (i.e., transcendent calling) or predominantly by internal sources (i.e., modern calling) was related to more successful university-to-work transition outcomes. Our findings contribute to the literature on calling by showing that the sources of calling are important to conceptualize different types of calling and differentiate the role of different callings.
A Replication of a Quasi-Experimental Approach to Estimating Middle School Structural Transition Effects on Student Learning Trajectories
Authors: Atteberry Allison , Wedow Robbee , Cook Nathan J. , McEachin Andrew
Published: February 2021

Using a dataset that includes over 17 million students from across all 50 states, we estimate the causal impact of making structural transitions into middle school (in grades 4, 5, 6, or 7) on student math and reading achievement trajectories. This dataset provides an ideal opportunity to engage in the valuable scientific practice of conducting replication studies. Prior research on the impacts of middle school transitions is of high quality and rests on a strong causal warrant, but the study settings vary greatly and use data from a prior decade. We conduct a replication (i.e., using the same methods on different data) using larger, broader, and more recent data. We extend prior analyses in ways that may further strengthen the causal warrant. Finally, we explore heterogeneity of effects across subgroups and states, which may help reconcile differences in the magnitude of estimated effects across studies.
A1C Reduction in Patients Who Declined Pharmacist-Led Diabetes Management Services
Authors: Ahmed Fahamina , Hammad Samah A. , Lin Jonathan F. , Gennaro Teresa L. , Gaspard Alexis L. , Sarpong Daniel F. , Onor IfeanyiChukwu O.
Published: February 2021

Introduction:

The purpose of this research is to assess the mean change in A1C associated with patients who declined a pharmacy-led diabetes management program and to evaluate effects of predictor variables on the odds of achieving improved A1C in these patients.

Study design:

Retrospective, single-center, single-group, cohort study.

Methods:

Patients 18 years or older with uncontrolled type 2 diabetes (defined as A1C ≥ 9%) who declined pharmacy-led diabetes management services were included in the study. The primary outcome of the study was to assess the mean change in A1C from time of phone call offering pharmacy management services (initial) to last observed A1C (final recorded A1C).

Results:

A total of 91 patients were included, 46 males and 45 females. The significant reduction in the mean change from baseline A1C to the final measured A1C was −0.59 (95% CI, −0.9327% to −0.2447%, P-value = 0.0010). This resulted in 8.79% of patients’ final A1C falling into the range of < 7%.

Conclusion:

Our study found a paradoxical reduction in A1C among patients who declined pharmacy-led diabetes management services, however, our study is limited by having no comparison group. Further research needs to be conducted to identify correlations between characteristics of patients declining diabetes management services in order to assist with identifying patient-specific methods for improving patient outcomes.
Reconciling Theory and Context in Comparative Nonprofit Research
Authors: Zhao Yi , Galaskiewicz Joseph , Yoon Eunsung
Published: February 2021

The article reviews a family of multilevel models that can be used to build general theories of the nonprofit sector that are still sensitive to variations in context. The comparative study of the nonprofit (or nongovernmental) sector presents formidable challenges to social scientists who are attempting to advance theory on the sector. Ostensibly, the goal is to model and test theories that are generalizable. Yet, as scholars study topics such as volunteerism, donations, governance, management, advocacy, accountability, and the like in different political, economic, and cultural contexts, they often find different patterns across cases. After reviewing the issues and introducing the idea that time (or more specifically events) can be thought of as context as well, we present an analytical approach for doing comparative research using the framework of hierarchical linear modeling.
Analysis of vibration response and machining quality of hybrid robot based UD-CFRP trimming
Authors: Zhang Yan , Li Hao , Qin Xuda , liu Jie , Hou Zhuojie
Published: February 2021

To fulfill the demands of higher precision, better quality, and more flexibility, the usage of high-performance industrial robots is rapidly increased in aerospace industry. Considering the anisotropic and inhomogeneous characteristics of composite materials, this study focuses mainly on dynamic response investigation of a newly designed hybrid robot (named as TriMule) in CFRP trimming process and its influence on the machined quality. First, combined with the cutting force characteristic, the vibration responses of tool center point (TCP) under the dynamic excitation were obtained. The influences of robotic TCP vibration on machined surface quality with different fiber orientations, including surface waviness, cavity, 3D surface roughness, and depth of affected zone, are first studied by comparing hybrid robot and machine tool. From experiment results, it can be concluded the proposed TCP vibration response model has sufficient prediction accuracy. Meanwhile, it is found that larger robotic vibration response is accompanied by higher surface waviness, bigger surface cavity, and greater affected zone. Results also showed that the fiber orientation and milling style are two essential factors that affect robot vibration and machining quality during CFRP trimming.
Evaluation of through-thickness residual stresses and microstructure in SA516 Gr. 70 steel welds
Authors: Taraphdar Pradeeptta Kumar , Mahapatra Manas Mohan , Pradhan Arun Kumar , Singh Pavan Kumar , Sharma Kamal , Kumar Suranjit
Published: February 2021

The critical working condition of nuclear power plant equipment necessitates meticulous determination of the welding process and parameters. In this work, some major influential factors of welding were investigated to observe their effects on the through-thickness residual stress distribution in multipass pressure vessel steel welds. In this regard, experiments were conducted to find the characteristics of residual stresses dispersed in SA516 Grade 70 steel welds of different groove geometries with distinct welding conditions. Three-dimensional finite element models of the weldments were developed considering a moving heat source with temperature-dependent material properties to simulate the welding thermal cycles and corresponding residual stress fields. Effects of weld groove geometry, number of weld passes, external constraints, and preheating on the through-thickness residual stress fields were studied. Additional attention was given to the evaluation of the heterogeneous microstructure and microhardness across the weld cross-section associated with their weld thermal history. Finally, the evolution of the through-thickness residual stresses attributed to subsequent weld passes was elaborated.
Event-triggered nonlinear model predictive control for trajectory tracking of unmanned vehicles
Authors: Zou Kai , Cai Yingfeng , Chen Long , Sun Xiaoqiang
Published: February 2021

In order to increase the real-time performance of lateral trajectory tracking of unmanned vehicles, this paper designs an event-triggered nonlinear model predictive controller, which can save computation resource to a large extent while the tracking accuracy is still guaranteed. Firstly, a simplified vehicle is established using a two-degree-of-freedom dynamics model. Then, according to the theory of model predictive control, a nonlinear model predictive controller (NMPC) is designed. Since traditional NMPCs often have poor real-time control performance, this paper introduces an event-triggered mechanism, which allows the remaining elements of the control variables in the control horizon to be applied to the system once a specific condition is satisfied. Finally, the proposed controller is established by Matlab/Simulink, and the different trigger conditions are compared and verified in a double lane change maneuvers Then a system for evaluation is designed to quantify the performance of the controller in different trigger conditions. For further verification of the proposed controller, a Hard-in-the-loop simulation system based on Xpack package is established to conduct an HIL experiment. The results show that compared with traditional nonlinear model predictive control, our method offers greatly improved real-time performance while the tracking accuracy is guaranteed.
Techno-Economic evaluation of an evacuated tube solar air collector with inserted baffles
Authors: Veera Kumar A , Arjunan TV , Seenivasan D , Venkatramanan R , Vijayan S
Published: February 2021

Evacuated tube solar collectors exhibit excellent performance even in poor insolation periods and are highly preferred for low as well as for medium temperature applications. In this study, an evacuated tube with inserted baffle solar air collector (ETIBSAC) was developed to investigate the effect of mass flow rate of air on energy, exergy, enviro-economic characteristics. The results revealed that the maximum outlet air temperature was observed during the peak irradiance period as 80.5 °C and the system is capable of delivering hot air above 50 °C between 9:30 am to 4:00 pm in clear sky days at the mass flow rate 100 kg/h. The maximum thermal efficiency of 55.4% was achieved at the mass flow rate of 500 kg/h. The highest exergy efficiency of 2.7% was recorded at 100 kg/h and diminishes with increasing mass flow rate of air due to more exergy destruction. The cost per kWh to deliver the hot air in the range of 60 to 70 °C is estimated as 0.00027 $(0.02 INR) at the mass flow rate of 100 kg/h. It is concluded that the developed air collector can be efficiently used for process heating applications.
Disclosure of HIV status to sexual partners among perinatally HIV–infected youth in Thailand
Authors: Boon-yasidhi Vitharon , Torsakul Sumonmal , Durier Yuitiang , Sittanomai Napat , Kuntasorn Jeeranan , Chokephaibulkit Kulkanya
Published: February 2021

Data regarding disclosure of HIV status to sexual partners among perinatally acquired HIV-infected (PHIV) youth are limited, particularly from Asian countries. This cross-sectional study assessed the patterns of, attitudes about, and factors associated with HIV disclosure to sexual partners among PHIV youth aged 15–24 years who attended a pediatric HIV clinic in Thailand. Participants were interviewed using a semi-structured questionnaire designed to elicit demographic and sexual behavior information. Those who had sexual partners were queried about their relationship and HIV status disclosure. Reasons to disclose or not to disclose were assessed accordingly. Among the 51 (44.4%) youth who had sexual partners, 55.8% had steady partners, 45.1% did not always use condoms, and 41.2% disclosed their HIV status. Reasons to disclose included trust and concern about the risk of infection to their partners. Reasons not to disclose included fear of rejection and stigmatization, and not knowing how to disclose. Most youth reported a need for disclosure-related guidance. Knowing their sexual partner’s HIV status was the only independent factor associated with disclosure (aOR 14.6; 95% CI 2.8–75.4). This study demonstrates a high rate of unsafe sex and a low rate of partner disclosure in PHIV youth, and highlights the need for a comprehensive guideline for HIV disclosure to sexual partners.
Spatial analysis and risk factors of suicide among people living with HIV/AIDS who committed suicide
Authors: Zhang Hanxi , Feng Yibing , Li Zheng , Xiu Xiangfei , Wang Lu
Published: February 2021

Poor mental health may confer worse health outcomes among people living with HIV/AIDS (PLWH). Suicidal behaviors are symptoms of a depressive episode. The goal was to explore characteristics for spatial distribution and risk factors for suicide among PLWH. This study was conducted in Mainland China with the annual newly reported data of PLWH from 2013 to 2018. We compared the spatial distribution differences between the HIV epidemic and suicide mortality and analyzed the global and local spatial analysis of suicide. Further, we explored the possible risk factors of suicide in PLWH by multivariate regression and a decision tree model. High suicide mortality regions in PLWH in China were inconsistent with that of the high prevalence of PLWH, which showed that there was distribution discordance between the HIV epidemic and suicide mortality. Multivariate regression showed that the possible risk factors of PLWH who committed suicide were younger age, with Han nationality, single, having a higher educational level, and homosexual infection route. The decision tree model showed that age was the primary factor. In conclusion, there was a discordance between HIV prevalence and suicide mortality; lower HIV prevalence regions might have higher mortality due to suicide. Concern is merited amongst PLWH with poor mental health.
Sociocultural affordances and enactment of agency: A transactional view
Authors: Pyysiäinen Jarkko
Published: February 2021

This article argues that when attempting to extend the concept of affordances to encompass action possibilities characteristic of our sociocultural environments, a transactionally informed relational perspective—along the lines formulated by classical pragmatist thinkers (especially Dewey and Bentley but also Peirce and Mead)—proves useful. A transactional perspective helps to reveal the intimate conceptual connections between sociocultural affordances (SCAs) and agency: both are crucially about contextually defined goal-directed doings, and about learning to fluently master particular patterns of habits, skills, and sociocultural practices in culturally appropriate and socially feasible ways. The paper outlines first, critical issues in the conceptualization of SCAs; second, how the concept of SCAs also points towards a transactional conception of agency enactment; and third, how a transactional view helps to make sense of some of the apparently puzzling tensions and fringe areas between various conceptualizations of (sociocultural) affordances and agency.
Isofraxidin Inhibits Receptor Activator of Nuclear Factor-κB Ligand–Induced Osteoclastogenesis in Bone Marrow–Derived Macrophages Isolated from Sprague–Dawley Rats by Regulating NF-κB/NFATc1 and Akt/NFATc1 Signaling Pathways
Authors: Wang Wei , Wang Bo
Published: February 2021

Osteoporosis is a common bone disease that is characterized by decreased bone mass and fragility fractures. Isofraxidin is a hydroxy coumarin with several biological and pharmacological activities including an anti-osteoarthritis effect. However, the role of isofraxidin in osteoporosis has not yet been investigated. In the present study, we used receptor activator of nuclear factor-κB ligand (RANKL) to induce osteoclast formation in primary bone marrow macrophages (BMMs). Our results showed that RANKL treatment significantly increased tartrate-resistant acid phosphatase (TRAP) activity, as well as the expression of osteoclastogenesis-related markers including MMP-9, c-Src, and cathepsin K at both mRNA and protein levels; however, these effects were inhibited by isofraxidin in BMMs. In addition, luciferase reporter assay demonstrated that isofraxidin treatment suppressed the RANKL-induced an increase in nuclear factor of activated T-cells cytoplasmic 1 (NFATc1) transcriptional activity. Besides, the decreased expression level of IκBα and increased levels of p-p65, p-IκBα, and p-Akt in RANKL-induced BMMs were attenuated by isofraxidin. Moreover, NFATc1 overexpression rescued the anti-osteoclastogenic effect of isofraxidin with increased expression levels of MMP-9, c-Src, and cathepsin K. Taken together, these findings indicated that isofraxidin inhibited RANKL-induced osteoclast formation in BMMs via inhibiting the activation of NF-κB/NFATc1 and Akt/NFATc1 signaling pathways. Thus, isofraxidin might be a therapeutic agent for the treatment of osteoporosis.
Entrepreneurial Intentions: Moving the Field Forwards
Authors: Donaldson Colin , Liñán Francisco , Alegre Joaquin
Published: February 2021

The purpose of this article is to articulate reasoning as to why there is a pressing need for a contextually based temporal approach towards the study of entrepreneurial intentions. Having done so, a potential means by which this can be achieved is put forth through assuming a socially situated perspective that links intentions, the entrepreneurial process of new venture creation, and a model of action abstractness. A conceptual model is proposed taking into consideration the entrepreneurial intention domain ‘as is’, ‘as should be’ and ‘as could be’. Value of current practice is assessed and challenged in a bid to stimulate new thinking in the area. The dynamic model provided contributes to contemporary scholarship through aligning entrepreneurial intentions with the accepted conception of entrepreneurship as a temporally embedded process. It moves beyond the artificial closure of an inherently open phenomenon.
Quantitative Cross-country Analysis of Nuclear Power Discourse in Politically Distinct India and Russia
Authors: Sharonova Yelizaveta Mikhailovna
Published: February 2021

Nuclear power has always been a controversial issue since it was discovered as a source of power for civil use. Despite being a global phenomenon, nuclear power is viewed differently around the world, and consequently, different discourses have had different outcomes. This study does a comparative analysis of nuclear power discourses between India and Russia, two countries of distinct political systems. This study analyses the media coverage and content of the main discourse themes in India’s and Russia’s print media from March 2011 to March 2019. The study finds that in both countries, despite their different political set-ups, nuclear power discourse has a pro-nuclear character.
Comparison of Traditional Videos With Telenovelas for Hospice Family Caregivers Education
Authors: Cruz-Oliver Dulce M. , Abshire Martha , Budhathoki Chakra , Hladek Melissa deCardi , Volandes Angelo , Jorgensen Lucas , Oliver Debra Parker
Published: February 2021

Background:

While research has shown that hospice family caregivers (HFCG) seek additional information related to patient care, pain and symptom management, and self-care, it is unknown how the use of telenovela videos for education in hospice would be received by HFCG.

Objective:

To explore HFCG perceived benefits and challenges with the use of telenovelas as compared to traditional educational videos during online support group.

Methods:

A mixed methods study with a concurrent triangulated design that analyzed qualitative interviews and YouTube analytics report to identify how viewers responded (number of views and their feedback) to telenovela videos as compared to traditional educational videos.

Results:

Among 39 (n = 39) HFCGs, most participants were female (80%) of White/Caucasian race, with more than high school education (85%) and they were adult children of hospice cancer patient (49%). Comparing HFCG that viewed traditional videos with HFCG that viewed telenovela videos, the telenovela video was watched more (12% longer viewing duration) and caregivers reported better content recall with informative benefits, more follow up actions and reflection about their own hospice experience.

Conclusion:

Caregiver feedback indicated that watching the telenovela was engaging, acceptable and produced more conversations about patient care, than watching a non-telenovela format video. Further research is needed to test telenovela efficacy in enhancing HFCG outcomes.
After the Plague: Revisiting Experiential and Adventure Education Outcome Variables After Covid-19
Authors: Ewert Alan , Davidson Curt
Published: February 2021

Background: The Covid-19 pandemic has changed the way the world works and experiential and adventure education programs are no exception. These changes have significantly affected various outdoor adventure and experiential education (OAEE) programs and will continue to do so in the foreseeable future. Purpose: To explore changes in outcome variables that may be appropriate for OAEE programs to consider, both during and after the pandemic. Methodology/Approach: Using relevant research literature, outcome variables applicable to a post-pandemic society are identified. Findings/Conclusions: Traditional outcome variables include self-efficacy, resilience, and skill development, which are achieved through intentionally designed experiences based in different theoretical frameworks. Implications: Outdoor and experiential organizations should consider adapting a broader range of outcome variables in program offerings to address the changing needs of a post-pandemic society.
Custom-Made Nasal Retainer Using Latex Nelaton Urine Catheter After the Cheiloplasty
Authors: Oh Joon Seok , Chung Jeehyeok , Ha Jeong Hyun , Yoo Hyo Kyung , Kim Sukwha
Published: February 2021

Nasal retainers are common tools used in managing patients with cleft lip. The significance of nasal retainer in preventing nostril collapse or stenosis to maintain a symmetrical nose after the surgical procedures is already well known. We came up with a way to create a nasal retainer using a latex nelaton catheter. Custom-made nasal retainer using latex nelaton catheter was used postoperatively on a 10-month-old infant with median cleft lip after cheiloplasty. In postoperative day 7, her nostrils were large enough for premade silicone nasal retainer to fit. She was discharged with instructions given to use the retainer for 6 months. Custom-made nasal retainer can be used as an alternative to premade nasal retainers for patients with wide columella or small nostril cavities, or who cannot afford premade retainers.
Continuum damage model for low-cycle fatigue of metals: An overview
Authors: Abdul-Latif Akrum
Published: February 2021

This work aims to give a comprehensive and accurate view of those micromechanical models that have been developed over the past two decades by our research team. We hereby refer to the distinct capabilities and theoretical difficulties of such models published in various journals by discussing them in a more integrated manner. We also believe that our community can find a significant benefit from this work through below mentioned discussions, which answer many of the questions asked by researchers and those interested in this field.

Returning to this work topic, the low-cycle fatigue (LCF) life is highly affected by microstructural instabilities, inhomogeneity and shear bands formation. The first type of damage is related to the nuclei of fatigue microcracks, for several FCC and BCC metals generally governed by continuous irreversible slips within the intensive slip bands. The second type of damage concerns ductile damage caused by cavitation induced by plastic strain and hydrostatic stress. Thereby, fatigue-failure is a relevant topic that requires further explanations to better understand the plausible damaging mechanisms of microcracks and/or microvoids at lower levels of observation.

To model the microcracks initiation, some attempts were conducted via micromechanical models assuming, for example, that the microcracks initiate at the crystallographic slip system level describing the LCF response of metals under simple and complex loading paths. In this overview, the latest development of mixed approach with double character called Micromechanical Determinist-Probabilistic Model (MDPM) coupled with damage will be presented with its generalized structure.
Comparison of Clinical Outcomes After Total Ankle Arthroplasty Between End-Stage Osteoarthritis and Rheumatoid Arthritis
Authors: Cho Byung-Ki , An Min-Yong , Ahn Byung-Hyun
Published: February 2021

Background:

Total ankle arthroplasty (TAA) is known to be a reliable operative option for end-stage rheumatoid arthritis. However, higher risk of postoperative complications related to chronic inflammation and immunosuppressive treatment is still a concern. With the use of a newer prosthesis and modification of anti-rheumatic medications, we compared clinical outcomes after TAA between patients with osteoarthritis and rheumatoid arthritis.

Methods:

Forty-five patients with end-stage osteoarthritis (OA group) and 19 with rheumatoid arthritis (RA group) were followed for more than 3 years after 3 component mobile-bearing TAA (ZenithTM). Perioperative anti-rheumatic medications were modified using an established guideline used in total hip and knee arthroplasty. Clinical evaluations consisted of American Orthopaedic Foot & Ankle Society (AOFAS) scores, Foot and Ankle Outcome Score (FAOS), and Foot and Ankle Ability Measure (FAAM).

Results:

In the preoperative and postoperative evaluation at final follow-up, there were no significant differences in AOFAS, FAOS, and FAAM scores between 2 groups. Despite statistical similarity in total scores, the OA group showed significantly better scores in FAOS sports and leisure (mean, 57.4 ± 10.1) and FAAM sports activity (mean, 62.5 ± 13.6) subscales than those in the RA group (mean, 52.2 ± 9.8, P = .004; and 56.4 ± 13.2, P < .001, respectively). There were no significant differences in perioperative complication and revision rates between 2 groups.

Conclusion:

Patients with end-stage ankle RA had clinical outcomes comparable to the patients with OA, except for the ability related to sports activities. In addition, there were no significant differences in early postoperative complication rates, including wound problem and infection.

Level of Evidence:

Level III, prognostic, prospective comparative study.
Designing An Augmented Reality Based Interface For Wearable Exoskeletons
Authors: Kulkarni Chaitanya , Hsing Hsiang-Wen , Kandi Dina , Kommaraju Shriya , Lau Nathan , Srinivasan Divya
Published: February 2021

Full-body, powered wearable exoskeletons combine the capabilities of machines and humans to maximize productivity. Powered exoskeletons can ease industrial workers in manipulating heavy loads in a manner that is difficult to automate. However, introduction of exoskeletons may result in unexpected work hazards, due to the mismatch between user-intended and executed actions thereby creating difficulties in sensing the physical operational envelope, need for increased clearance, and maneuverability limitations. To control such hazards, this paper presents a rearview human localization augmented reality (AR) platform to enhance spatial awareness of people behind the exoskeleton users. This platform leverages a computer vision algorithm called Monocular 3D Pedestrian Localization and Uncertainty Estimation (MonoLoco) for identifying humans and estimating their distance from a video camera feed and off-the-shelf AR goggles for visualizing the surrounding. Augmenting rear view awareness of humans can help exoskeleton users to avoid accidental collisions that can lead to severe injuries.
Developing an Integrated Energy System Interface for Electricity-Hydrogen Hybrid Nuclear Operations
Authors: Ulrich Thomas A. , Lew Roger , Boring Ronald L. , Mortenson Torrey , Park Jooyoung , Medema Heather
Published: February 2021

Nuclear power plants are looking towards integrated energy systems to address the challenges faced by increasing competition from renewable energy and cheap natural gas in wholesale electricity markets. Electricity-hydrogen hybrid operations is one potential technology being explored. As part of this investigation a human factors team was integrated into the overall engineering project to develop a human system interface (HSI) for a novel system to extract steam for a coupled hydrogen production process. This paper presents the process used to perform the nuclear specific human factors engineering required to develop the HSI for this novel and unprecedented system. Furthermore, the early integration of the human factors team and the meaningful improvements to the engineering of the system itself in addition to the successful development of the HSI for this particular application are described. Lastly, the HSI developed is presented to demonstrate the culmination of the process and disseminate a potential HSI design for electricity-hydrogen hybrid operations that may be useful for others exploring similar integrated energy systems concepts.
A Mixed Analysis of Influencing Factors for Trust in a Risk-Aware Autonomy
Authors: Huang Lixiao , Cummings M.L. , Ono Masahiro
Published: February 2021

To study the factor of controllability for humans’ trust in autonomy in decision making, 73 participants used a risk-aware, autonomous planner to navigate an underwater robot in a software-simulated, resource- limited, and risky environment. The experiment examined the association of controllability of the leg size of the path planner with participants’ trust, as well as the underlying reasons. The quantitative analysis showed no significant effect of controllability on trust. However, a verbal data analysis method, which systematically coded and quantified participants’ reasons for choosing their trust levels at different intervals during the experiment, showed that the dimension execution and control was the most frequently mentioned among four emerging practical dimensions of influencing factors for their trust. The other three included risk evaluation; training and learning; and general attitudes. The findings suggested further research on more aspects of controllability, especially the ones that support personal plans, from a human- autonomy interface design perspective.
Performance and Eye Metrics Correlates to Out-of-the-zone Sustained Attention in GradCPT
Authors: Zhang Wei , Zhang Yifan , Xu Jie
Published: February 2021

The purpose of this study was to replicate previous behavioral performance results and investigate eye met- rics correlates in the Gradual Onset Continuous Performance Task (gradCPT). Previous research has shown that gradCPT can provide a measurement of fluctuations in sustained attention over time. In this study, 30 participants each completed three eight-minute sessions of gradCPT. “In the zone” and “out of the zone” periods were identified according to the Variance Time Course measure. Patterns of reaction time, d’, and error rates were consistent with previous studies, while criterion scores differed between the two-zone peri- ods. Eye-tracking data indicated that mean and variation of pupil size, saccade duration, saccade peak veloc- ity, and fixation duration were sensitive to the in-the-zone vs. the out-of-the-zone periods. These results sug- gest that some individuals may change their task strategy during out-of-the-zone periods. Eye metrics might be useful indicators for out-of-the-zone performance when behavioral performance metrics were not availa- ble.
General Aviation Weather Hazards:Current Human Factors Research, Pilot Practices, and Tools
Authors: Blickensderfer Beth , Brown Lori J , Greenman Alyssa , King Jayde , Pitts Brandon
Published: February 2021

When General Aviation (GA) pilots encounter unexpected weather hazards in-flight, the results are typically deadly. It is unsurprising that the National Transportation Safety Board repeatedly lists weather related factors in GA flight operations as an unsolved aviation safety challenge. Solving this problem requires multidisciplinary perspectives. Fortunately, in the past several years innovative laboratory research and industry products have become available. This panel discussion brings together Human Factors and Ergonomics researchers and practitioners to discuss and describe the current work and future directions to avoid weather related accidents in GA.
Impact of UAS with Low Size, Weight, and Power Sensors on Air Traffic Controllers’ Performance and Acceptability Ratings
Authors: Vu Kim-Phuong L. , VanLuven Jonathan , Diep Timothy , Battiste Vernol , Brandt Summer , Monk Kevin J. , Rorie Robert C. , Shively Robert J. , Strybel Thomas Z.
Published: February 2021

A human-in-the-loop simulation was conducted to evaluate the impact of Unmanned Aircraft Systems (UAS) with low size, weight, and power (SWaP) sensors operating in a busy, low-altitude sector. Use of low SWaP sensors allow for UAS to perform detect-and-avoid (DAA) maneuvers against non-transponding traffic in the sector. Depending upon the detection range of the low SWaP sensor, the UAS pilot may or may not have time to coordinate with air traffic controllers (ATCos) prior to performing the DAA maneuver. ATCo’s sector performance and subjective ratings of acceptability were obtained in four conditions that varied in UAS-ATCo coordination (all or none) prior to the DAA maneuver and workload (higher or lower). For performance, ATCos committed more losses of separation in high than low workload conditions. They also had to make more flight plan changes to manage the UAS when the UAS pilot did not coordinate DAA maneuvers compared to when they did coordinate the maneuvers prior to execution. Although the ATCos found the DAA procedures used by the UAS in the study to be acceptable, most preferred the UAS pilot to coordinate their DAA maneuvers with ATCos prior to executing them.
UAS Pilot Assessments of Display and Alerting for the Airborne Collision Avoidance System XU
Authors: Smith Casey L. , Rorie R. Conrad , Monk Kevin J. , Keeler Jillian , Sadler Garrett G.
Published: February 2021

Unmanned aircraft systems (UAS) must comply with specific standards to operate in the National Airspace System (NAS). Among the requirements are the detect and avoid (DAA) capabilities, which include display, alerting, and guidance specifications. Previous studies have queried pilots for their subjective feedback of these display elements on earlier systems; the present study sought pilot evaluations with an initial iteration of the unmanned variant of a Next Generation Airborne Collision Avoidance System (ACAS XU). Sixteen participants piloted simulated aircraft with both standalone and integrated DAA displays. Their opinions were gathered using post-block and post-simulation questionnaires as well as guided debriefs. The data showed pilots had better understanding and comfort with the system when using an integrated display. Pilots also rated ACAS XU alerting and guidance as generally acceptable and effective. Implications for further development of ACAS XU and DAA displays are discussed.
An Evaluation of UAS Pilot Workload and Acceptability Ratings with Four Simulated Radar Declaration Ranges
Authors: Keeler Jillian N. , Conrad Rorie R. , Monk Kevin J. , Sadler Garrett G. , Smith Casey
Published: February 2021

Currently, minimum operational performance standards (MOPS) are being developed for a broader rangeof unmanned aircraft system (UAS) platforms, including smaller UAS that will feature onboard sensors that are low in size, weight, and power, otherwise known as low SWaP. The low SWaP sensors used to detect non-cooperative traffic will have limited declaration ranges compared to those designed for medium-to-large UAS. A human-in-the-loop (HITL) study was conducted examining four possible radar declaration ranges (i.e., 1.5 NM, 2 NM, 2.5 NM, and 3 NM) for a potential low SWaP sensor with a detect and avoid (DAA) system encountering various non-cooperative encounters in Oakland Center airspace. Participants had lower workload, particularly workload associated with temporal demand and effort, in scenarios that featured larger detection ranges. Furthermore, participants reported better ability to remain DAA well clear within the larger declaration range conditions, specifically with the 2.5 NM and 3 NM conditions.
Design of a Decision Support Application to Support Individuals in Mental Health Crisis
Authors: Johnson Amanda J. , Bisantz Ann M. , Reynolds Amy L. , Meier Scott T.
Published: February 2021

Mental health and suicide are two substantial issues facing our society. They have far reaching impacts on the healthcare and public safety systems, the economy, and human life. Despite their impact and importance, the amount of research is disproportionate to the magnitude of the problem. The current study sought to determine decision requirements of those in mental health crisis and to translate them into a user-friendly mobile application. Individuals who had been in mental health crises and mental health professionals were interviewed. Results showed that both the availability of resources and the impact of anxiety and overwhelm on decision making are areas in which individuals in crisis can be better supported. Outcome of research included design of a prototype mobile application designed to support decision making during mental health crisis.