bluuebunny/crossref_metadata_2025 huggingface dataset:
Three-point bending straightening algorithm and verification for I-type seamless welded rail
Authors: Mao Huajie , Li Zhi , Lan Jian , Chen Han , Zhang Baojun
Published: December 2021

The straightness of seamless welded rail (SWR) is very important for high speed railways. To improve the straightness of SWR, in this paper, we propose a three-point bending straightening algorithm for I-type SWR. It has been verified by theoretical analysis, finite element simulation, and experiments. The three-point bending straightening algorithm for I-type SWR has three steps: (1) three-point bending straightening prediction models are established based on simplified cross-section; (2) shape compensation coefficients are proposed to reduce the influence of simplified cross-section on the accuracy of the prediction models; (3) effective simplified cross-section dimensions are determined by optimizing shape coefficients with the Trust-Region-Reflective Least Squares method. The three-point bending straightening algorithm, which meets the needs of prediction precision in the industrial application, is stable and convergent, and could be the basis of further intelligent straightening.
Metallurgical, mechanical and tribological behavior of Reinforced magnesium-based composite developed Via Friction stir processing
Authors: Sagar Prem , Handa Amit , Kumar Gitesh
Published: December 2021

Reinforced magnesium metal matrix nanocomposites (MMMNCs) have piqued the interest of scientific community in recent years. Friction stir processing (FSP) is a known process to achieve the highest level of secondary phase nanocomposites distribution in the base monolithic matrix. In this study, an attempt has been made to synthesize magnesium base AZ61A/n-TiC nanocomposites using FSP and the influence of tool rotational speed on the metallurgical, mechanical, and tribological behavior of the developed composites has been studied. Microstructural examination shows that as tool rotational speed increases, high plastic deformation occurs and heat is generated along with the concomitant shattering impact of rotation, which consequently develops larger grains in the stir zone. However, this also provides thrusts resulting in uniform distribution of the nanoparticles in the base matrix. Microhardness and ultimate tensile strength of the developed nanocomposite were found to be significantly improved when contrasted with the base metal. Lower wear rate was observed for the composite developed at 800 rpm along with the abrasive type of wear mechanism.
The need for paleoflood investigations on the American reach of the Red River of the North
Authors: St. George Scott , Zeleznik Joseph , Avila Judith , Schlauderaff Matthew
Published: December 2021

Over the past century, the Red River of the North has been the least stationary river in the continental United States. In Canada, historical and paleoenvironmental evidence indicates severe floods were common during the early 1800s, with the record ce 1826 flood having an estimated peak discharge 50% higher than the second-most severe flood ever observed. Unfortunately, the recorded history of flooding upstream in the United States does not begin until seven decades after this event. If 1826 was an equally exceptional flood on American reach of the river, then current flood-frequency curves for the river underestimate significantly the risks posed by future flooding. Alternatively, if the American stretch did not produce a major flood in 1826, then the recent spate of flooding that has occurred over the past two decades is exceptional within the context of the past 200 years. Communities in the Fargo-Moorhead metropolitan area are building a 58-km long, $2.75 billion (USD) diversion channel that would redirect floodwaters westward around the two cities before returning it to the main channel. Because this and other infrastructure in North Dakota and Minnesota is intended to provide protection against low-probability, high-magnitude floods, new paleoflood investigations in the region would help local, state, and federal policy-makers better understand the true flood threats posed by the Red River of the North.
Colloidal characteristics of gelatin-treated clay: Intercalation, stability, wettability, and rheological properties
Authors: Luo Xuwu , Jiang Guancheng , Li Xinliang , Yang Lili
Published: December 2021

In this paper, sodium montmorillonite was modified with gelatin of different concentrations, and various colloidal characteristics of the gelatin-treated clays were measured and analyzed in detail. First, the influence of gelatin on the interlayer space of Mt layers was investigated by X-ray diffraction analysis. Moreover, the aggregation of Mt particles was examined using a combination of electron microscopy and particle size distribution experiments, while the variation of the electrical property of Mt was measured using ζ potential test. Gelatin of different concentrations can increase the particle size of Mt in different degrees. The addition of 4% gelatin could improve the ζ potential of Mt from −30.65 to −15.55 mV. The wettability change of modified Mt induced by the adsorption of gelatin was followed by measurements of water contact angle and observations of the morphology of Mt/gelatin membrane through SEM images. 4% gelatin could improve the water contact angle of Mt to 81.3°. Finally, the rheological properties of Mt/gelatin dispersion including shear viscosity and shear stress were measured using a stress-controlled rheometer. All of the results were consistent by showing that the overall colloidal characteristics and behavior of the gelatin-treated Mt strongly varied depending on the gelatin concentration used in the modification process. These results can provide a deep and comprehensive understanding of the colloidal properties of clay/gelatin systems and give important guidance for the performance design and improvement of Mt/gelatin composite materials. Furthermore, this study can also be expanded the application of gelatin and its composites to other fields.
Fabrication and optimization of PCL/PVP nanofibers with Lawsonia inermis for antibacterial wound dressings
Authors: Varsei Mehdi , Tanha Nadia Rahimi , Gorji Mohsen , Mazinani Saeedeh
Published: December 2021

Anti-infection ability and desirable air permeability (AP) are the important aspects of wound dressings that should be regulated with regard to primary polymers and antibacterial agents. This study aims to fabricate and optimize a wound dressing with antibacterial properties. For this purpose, polycaprolactone (PCL) as a hydrophobic polymer and polyvinylpyrrolidone (PVP) as a hydrophilic polymer were electrospun with Lawsonia inermis (Henna) extract as an antibacterial component based on the experiments proposed by Design-Expert software. The morphology and properties of the wound dressing were studied by scanning electron microscopy, Fourier transform infrared, and AP. The response surface method (RSM) was used to determine the optimal fiber diameter and AP of the samples as a function of the polymer concentration and feed rate. The optimal PCL/PVL/Henna wound dressing has antibacterial properties against Gram-positive and Gram-negative bacteria while being biocompatible according to the MTT assay. These fibrous structures can be used as a wound dressing to prevent infection and accelerate wound healing; thanks to proper Henna release, breathability, swelling ratio, and mechanical performance.
Improvement of technological properties of wood plastic composites reinforced with glass and carbon fibre fabric
Authors: Durmaz Sefa , Erdil Yusuf Z , Avci Erkan
Published: December 2021

In this study, HDPE-based flat-pressed WPCs were reinforced with glass fibre and carbon fibre woven fabrics, which could be used where high strength and stiffness are required. The effect of reinforcement on some physical, mechanical, and thermal properties and fire performance was investigated. According to the results, the increase in woven fabric density resulted in holding much water in the microvoids in the fabric, which increased water absorption up to 32.96%. Reinforcement also resulted in increased hardness. In general, continuous filaments in the fabric significantly increased mechanical properties. The improvement exceeded over 400% for tensile strength compared to unreinforced control samples, while the increases were 129% and 115% for the flexural strength and MOE, respectively. The interlocking of matrix and woven fabrics is an important factor that affects load transfer. The strong interaction between wood-polymer and the wood-polymer-woven fabric was observed from the SEM investigation. The thermal stability of composites was also improved, possibly due to the homogeneous distribution of heat within fibres. Glass and carbon fibres presumably acted as a buffer against increasing heat, increasing the onset temperature. Moreover, according to the LOI test, the need for oxygen increased from 24.72 to 26.01 with the effect of wood flour and reinforcement.
Mechanical properties of polyester/corn husk fibre composite produced using vacuum infusion technique
Authors: Mir Md Shibly Shadik , Chan Ming Yeng , Koay Seong Chun
Published: December 2021

Issues pertaining to deforestation, environmental pollution and natural wastes are increasing day by day. These issues can be resolved by introducing a new composite material, in which natural waste is used as fibre and as a replacement of wood plastic composite. The different lengths (3, 6 and 9 cm) of corn husk fibre filled polyester composites were produced using the vacuum infusion method. Several mechanical properties of these polyester composites, such as tensile and flexural properties, were evaluated. The results revealed that both the tensile and flexural properties of polyester composites increased with increment of corn husk fibre length from 3 to 6 cm. However, the results decreased for 9 cm of fibre length filled composites. Similar trends were recorded after alkali treatment of the corn husk fibre filled polyester composites. The alkali treatment with sodium hydroxide had improved the tensile strength (33%), Young’s modulus (23%), elongation (14%), flexural strength (42%) and flexural modulus (8.5%) of the polyester/corn husk fibre composites with 6 cm of fibre length by enhancing the mechanical interlocking bonding between treated corn husk fibres and polyester.
Using potential of filament-wound carbon/glass polymeric composites as rocket motor thermal insulation
Authors: Rusmirović Jelena , Galović Jela , Kluz Marija , Perković Srdja , Brzić Saša , Bogosavljević Marica , Milojković Aleksandar , Kovačević Tihomir
Published: December 2021

The study aim is to develop hybrid filament-wound polymeric composites based on flame retardant polyester resin (UPe) and multi-layer structured glass or combined carbon and glass fibers for use as ablative thermal insulation of rocket motor by wet filament winding technique. The composites have a multi-layered structure consisting of two layers of carbon (CF) or glass woven fabric (GF) and one layer of carbon or glass direct roving (CR or GR, respectively), repeated in three cycles. Structural analysis, performed using FTIR spectroscopy and dynamical-mechanical analysis, confirm highly polymerized network. Lower values of the tanδ peak height indicate improved interfacial adhesion between carbon/glass fibers and UPe. The improvements of thermal insulation index of 37% and erosion rate of 38.6% at 180°C are achieved for combined carbon/glass fiber–based composite compared to the neat UPe. Tensile and interlaminar shear properties are investigated according to the fiber orientation and the highest values of tensile and interlaminar shear strengths are obtained for composites with longitudinal orientation, 417.48 MPa and 22.30 MPa, respectively. Compared to the neat UPe, which degrades after 50 s at 3000°C, the composites are stable up to 192 s.
Thermal behaviour of benzoxazine blends based on epoxy and cyanate ester
Authors: Krishnasamy Balaji , Arumugam Hariharan , M Mohamed Iqbal , Muthukaruppan Alagar
Published: December 2021

In the present work, an attempt has been made to develop high-performance polymeric hybrid binary blends of epoxy/benzoxazine and benzoxazine/cyanate ester with varying weight percentages (25/75, 50/50 and 75/25 wt%) of resins, namely, bisphenol-F epoxy resin (DGEBF), benzoxazines [bisphenol–F/aniline (BF-a) and imidazole core-based bisphenol/aniline (IBP-a)] and cyanate ester [bisphenol-F bifunctional cyanate ester (BF-CE)]. The molecular structure, polymerisation temperature/cure behaviour, glass transition temperature (Tg) and thermal stability of the neat polymeric matrices and binary hybrid blends of polymeric matrices were characterised using different analytical techniques, viz. Fourier Transform infra-red spectroscopy (FTIR), Nuclear Magnetic Resonance spectroscopy (NMR), Differential Scanning Calorimetry (DSC) and thermogravimetric analysis (TGA). Among the binary hybrid blends, the lowest polymerisation temperatures (Tp) were noticed in the case of blends of epoxy/benzoxazine were 219°C for DGEBF/BF-a (25/75 wt%) and 170°C for DGEBF/IBP-a (25/75 wt%). Similarly, in the case of blends of benzoxazine/cyanate ester, the lowest values of Tp observed were 155°C and 153°C for BF-a/BF-CE (75/25 wt%) and IBP-a/BF-CE (75/25 wt%), respectively. The highest values of Tg observed for the blends of epoxy/benzoxazine were 175°C and 254°C for DGEBF/BF-a (25/75 wt%) and DGEBF/IBP-a (25/75 wt%), respectively. Whereas, the highest values of Tg observed in the case of blends of benzoxazine/cyanate ester were 234°C and 278°C for BF-a/BF-CE (25/75 wt%) and IBP-a/BF-CE (75/25 wt%), respectively. From the TGA results of blends, the maximum degradation temperature (Tmax) and limiting oxygen index (LOI) value calculated from the char yield, which ascertain that almost all the binary hybrid blends of epoxy/benzoxazine and benzoxazine/cyanate ester possess good flame retardant behaviour.
Physico-mechanical properties of polylactic acid bio-nanocomposites filled by hybrid nanoparticles
Authors: Mirabolghasemi Seyed Mehdi , Najafi Mohsen , Azizi Alireza , Haji Bagherian Mehdi
Published: December 2021

This study is aimed to investigate the effect of the simultaneous incorporation of cellulose nanocrystals (CNC) and silver nanoparticles (SN) on the mechanical, biodegradability, and water vapor permeability of polylactic acid (PLA)-based films. PLA films and their nanocomposites containing different levels of CNC (0.333, 1 and 1.667 phr) and SN (0.333 phr) were prepared by solution casting method. CNC was reacted with acetic anhydride to improve its compatibility and miscibility with PLA. Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), tensile test, and water vapor permeability and antibacterial tests were employed to characterize the samples. The biodegradability was assessed by measuring the weight loss upon burial in the soil. FTIR spectroscopy confirmed the modification of cellulose nanocrystals. TGA test showed that partial acetylation slightly improved the thermal stability of CNC. The presence of cellulose nanocrystals increased the tensile strength and modulus of elasticity of the nanocomposite relative to pure polylactic acid. The biodegradability and water vapor permeability of the samples decreased upon CNC incorporation. The antibacterial properties of the films showed the higher resistance of the gram-positive bacteria as their cell walls include a peptidoglycan layer.
Vibroacoustic design optimization of curved composite shells
Authors: Apalowo Rilwan K , Chronopoulos Dimitrios
Published: December 2021

The need to simultaneously optimize the structural design properties, and attain a satisfactory vibroacoustic performance for composite structures, has been a challenging task for modern structural engineers. This work is aimed at developing a statistical energy analysis (SEA) based numerical scheme for computing the optimal design parameters of each individual layer of layered curved shells having arbitrary complexities and layering. The main novelty of the work focuses on the computation of SEA properties for curved composite shells and derive the sensitivities of the acoustic transmission coefficient, expressed through the computed SEA properties, with respect to the structural design characteristics to be optimized. A wave finite element approach is employed to calculate the wave propagation constants of the curved shell. The calculated wave constants are then applied to compute the vibroacoustic properties for the curved shell using a SEA approach. Sensitivity analyses are conducted on the vibroacoustic properties to estimate their response to changes in the structural properties. Gradient vector is then formulated and hence the Hessian matrix, which is employed to formulate a Newton-like optimisation algorithm for optimizing the properties of the layered composite shell. The developed scheme is applied to a sandwich shell; optimal design parameters of [Formula: see text] and [Formula: see text] are obtained for the facesheet and the core of the shell whose base parameters are [Formula: see text] and [Formula: see text], respectively. This simultaneously optimizes the structure with maximum stiffness and minimum mass and attains a satisfactory dynamic performance for acoustic transmission through the sandwich shell. The principal advantage of the scheme is the ability to accurately model composite panels of arbitrary curvature at a rational computational time.
Ethical dilemmas in nursing documentation
Authors: Jørgensen Lone , Kollerup Mette Geil
Published: December 2021

Background:

Nursing documentation is an essential aspect of ethical nursing care. Lack of awareness of ethical dilemmas in nursing documentation may increase the risk of patient harm. Considering this, ethical dilemmas within nursing documentation need to be explored.

Aim:

To explore ethical dilemmas in nurses’ conversations about nursing documentation.

Research design, participants and context:

The study used a qualitative design. Participants were registered nurses from a Patient Hotel at a Danish University Hospital. Data were collected in three focus groups with a total of 12 participants. Data analysis consisted of qualitative content analysis inspired by Graneheim and Lundman.

Ethical consideration:

This study was conducted in accordance with the ethical principles of research and regulations in terms of confidentiality, anonymity and provision of informed consent.

Findings:

Ethical dilemmas were strongly present in nurses’ conversations about nursing documentation. These dilemmas were demonstrated in two themes: (1) a dilemma between respecting patients’ autonomy and not causing harm, which was visible in nurses’ navigation between written documentation and oral tradition, and (2) a dilemma concerning justice and fair distribution of goods, which was visible in nurses’ balancing between documenting deviations and proof of nursing practice.

Discussion:

Ethical dilemmas in nursing documentation regarding respecting patients’ autonomy and not causing harm accentuated discussions on professional responsibility and patient participation in clinical decisions. Dilemmas in justice and fair distribution of goods emphasised discussions on trust in relationships versus trust in electronic health records.

Conclusion:

Actual tendencies in the healthcare system may increase ethical dilemmas in nursing documentation. Sharing otherwise invisible and individual experiences of ethical dilemmas in nursing documentation among nurses, nurse leaders and decision-makers will enable addressing these in reflections and discussions as well as in considering adjustments of conditions for nursing documentation.
Vocational careers of retired Olympic athletes from Switzerland: A person-oriented study
Authors: Schmid Michael J , Örencik Merlin , Schmid Jürg , Nagel Siegfried , Conzelmann Achim
Published: December 2021

For many high-performance athletes, competing in the Olympic Games is a major goal. Achieving this goal requires more than ever substantial investments of time and personal resources towards the sports career over several years. Thus, some athletes neglect other areas of life (e.g. education), which can pose a problem for the time after high-performance sport, while other athletes pursue a dual career. Previous studies have shown that former high-performance athletes achieved higher levels of education and better vocational positions than the general population. Due to the advancing professionalization and commercialization of high-performance sport, the question emerges whether these results are valid for athletes that are more recently retired. In addition, cross-cultural generalisability of these findings are of interest. For this purpose, 341 former athletes representing Switzerland at the Olympics were surveyed about their athletic, educational, and vocational careers. It turns out that these athletes obtained more degrees of higher education than the general population. Relative to their siblings, they have higher school-leaving certificates and work in more prestigious occupations. Following the holistic-interactionistic paradigm, person-oriented analyses was performed and revealed nine – mostly satisfactory – vocational career patterns. Hence, involvement in high-performance sport facilitates rather than hinders a successful vocational career.
Boosting Career and Employability Outcomes Through Multiple Learning Abroad Experiences
Authors: Potts Davina , Kim Jeongeun
Published: December 2021

While participation in learning abroad has increased rapidly over the last decade, short-term programs played an important role in boosting participation and widening access to learning abroad. The current study takes advantage of a new pattern of participation in learning abroad to examine self-reported career outcomes and employability development benefits based on program duration and the number of programs undertaken. Using a large-scale dataset of graduates of Australian universities, the study challenges conventional wisdom that a longer experience is better and explores the impact of multiple short-term program participation as a new intervention in graduate career outcomes. Although this study is based on the Australian higher education context, the results may be informative to educators and policy-makers from countries with comparable learning abroad programs in considering how short-term programs can be used more purposefully to foster positive careers and employability outcomes.
Conversations that count: Lessons from evaluating a men’s digital mental health response during COVID-19
Authors: Erskine Kathryn , Healey Matt
Published: December 2021

This paper details disruption and innovation in digital evaluation practice at Movember, as a result of the COVID-19 pandemic. The paper examines a men’s digital health intervention (DHI) – Movember Conversations – and the product pivot that was necessary to ensure it could respond to the pandemic. The paper focuses on the implications of the pivot for the evaluation and how the evaluation was adapted to the COVID-19 exigencies. It details the redesign of the evaluation to ensure methods wrapped around the modified product and could deliver real-time, practical insights. The paper seeks to fill knowledge gaps in the DHI evaluation space and outlines four key principles that support evaluation re-design in an agile setting. These include a user-centred approach to evaluation design, proportionate data collection, mixed (and flexible) methodologies, and agile evaluation reporting. The paper concludes with key lessons and reflections from the evaluators about what worked at Movember, to support other evaluators planning digital evaluations.
Cross-cultural realist interviews: An integration of the realist interview and cross-cultural qualitative research methods
Authors: O’Rourke Kerryn , Abdulghani Nawal , Yelland Jane , Newton Michelle , Shafiei Touran
Published: December 2021

Realist interviews are a data collection method used in realist evaluations. There is little available guidance for realist interviewing in cross-cultural contexts. Few published realist evaluations have included cross-cultural interviews, providing limited analyses of the cross-cultural application of realist methodology. This study integrated realist and cross-cultural qualitative methods in a realist evaluation of an Australian doula support program. The interviews were conducted with Arabic speaking clients of the program. The process included collaboration with a bicultural researcher, philosophically situating the study for methodologically coherent integration, bicultural review of the appropriateness of realist ‘how’ and ‘why’ questions, decisions about language translation and interpretation, pilot interviews, and co-facilitation of the interviews. Integration of the methods was feasible and valuable. This study may support other realist evaluators to give voice to people from culturally diverse groups, in a manner that is culturally safe, methodologically coherent and rigorous, and that produces trustworthy results.
Demographic and clinical factors associated with psychiatric inpatient admissions during the COVID-19 pandemic
Authors: Seiler Natalie , Ng Matthew , Dawud Midya , Das Subhash , Ooi Shu-Haur , Waterdrinker Astrid
Published: December 2021

Objective:

The COVID-19 pandemic may cause a major mental health impact. We aimed to identify demographic or clinical factors associated with psychiatric admissions where COVID-19 was attributed to contribute to mental state, compared to admissions which did not.

Methods:

A retrospective cohort study was undertaken of inpatients admitted to Northern Psychiatric Unit 1, Northern Hospital in Melbourne, Victoria, Australia during 27/02/2020 to 08/07/2020. Data were extracted for participants who identified COVID-19 as a stressor compared to participants who did not. Fisher’s exact test and Mann-Whitley rank sum test were used.

Results:

Thirty six of 242 inpatients reported the COVID-19 pandemic contributed to mental ill health and subsequent admission. Reasons given included social isolation, generalized distress about the pandemic, barriers to support services, disruption to daily routine, impact on employment, media coverage, re-traumatization, cancelled ECT sessions, loss of loved ones, and increased drug use during the lockdown. Chronic medical conditions or psychiatric multimorbidity were positively associated and smoking status was negatively associated with reporting the COVID-19 pandemic as a contributor to mental ill health.

Conclusion:

Screening and identifying vulnerable populations during and after the global disaster is vital for timely and appropriate interventions to reduce the impact of the pandemic worldwide.
Caregiver Challenges Seen From the Perspective of Certified Home Hospice Medical Directors
Authors: Agarwal Ankita , Alshakhs Sulaiman , Luth Elizabeth , Dignam Ritchell , Reid Manney C. , Adelman Ronald D. , Czaja Sara J. , Phongtankuel Veerawat
Published: December 2021

Background: Hospice medical directors (HMDs) play an important role as part of the interdisciplinary hospice team. Family caregivers (CGs) play a critical role in caring for patients receiving home hospice care. Understanding the challenges HMDs face when working with CGs is important when addressing potential gaps in care and providing quality end of life (EoL) care for the patient/CG dyad. Objectives: To understand issues HMDs encounter when working with and caring for CGs and to determine how they manage these issues in the home hospice setting. Design: Twelve semistructured phone interviews with certified HMDs were conducted. Data were analyzed using standard qualitative methods. Subjects: Participants included certified HMDs obtained from a public website. Results: Participants’ responses regarding the major issues HMDs faced when working with CGs were categorized into 6 themes: (1) assessing CG competency, (2) CG financial burden, (3) physical burden of caregiving, (4) managing CG expectations, (5) CGs denial of patient’s terminal condition, and (6) CGs unwilling or unable to engage with providers about their needs or the patient’s needs. Conclusions: HMDs confirmed the important role CGs play in providing care to home hospice patients. Challenges faced by HMDs vary from assessing CG competency in providing care to the patient, dealing with the physical and financial toll that CGs face, and addressing CGs’ expectations of hospice care. Future studies are needed to explore solutions to these issues to better support CGs in the home setting.
Bearing Bad News: The Impact of Delivering and Receiving News of Sudden Bereavement
Authors: Sweeney Susan
Published: December 2021

First responders and care professionals are often required to convey the deeply distressing news to relatives of the sudden death of a loved one. Witnessing the extreme anguish and grief of those receiving such news can have a detrimental effect on the bearers, leading to peritraumatic distress and feelings of inadequacy and burnout. For the recipients of such news, how it is delivered will impact on their understanding, acceptance, and processing of the sudden loss and may be a precursor for complicated grief or mental health issues such as anxiety or depression. Through writing about her own experience, the author aims to illustrate how interaction with professionals supported or impacted adversely on her grief and is intended to maintain professionals’ awareness of the impact of their delivery on recipients. Ancillary professionals also have an important role in how they interact with the bereaved and in ameliorating their deep distress.
From Isolation to Connection: Empathy, Prosocial Behavior, and Posttraumatic Growth After Pregnancy Loss
Authors: Freedle Agata , Oliveira Emily
Published: December 2021

The purpose of this study was to explore the relationship between prosocial behaviors, empathy, and positive psychological change in women who have experienced pregnancy loss. Women who had experienced miscarriage or stillbirth ( n = 291) were recruited via social media and completed an online survey that assessed their engagement in in-person or online prosocial behavior, empathy, and posttraumatic growth (PTG). Loss context factors and demographics were also collected. The results indicated that women who engage in in-person prosocial behavior, such as volunteering, report higher levels of PTG compared to those who do not volunteer at all or only volunteer online. A weak positive relationship was found between PTG and empathy. Findings suggest that encouraging clients to engage in in-person volunteering may foster their experience of growth. Future research is needed to further explore the timing of the volunteering in relation to PTG as well as empathy and PTG.
Heart Failure and Disability in Community-Dwelling Older Adults in the United States—1999 to 2018: Data From National Health and Nutrition Examination Survey
Authors: Seo Yaewon , Wang Jing , Barnes Donelle , Barshikar Surendra
Published: December 2021

To examine the associations of heart failure (HF) with five domains of disability while controlling for covariates. Subjects with HF and aged ≥ 50 years were selected from the 1999 to 2018 National Health and Nutrition Examination Survey data. Five domains of disability were measured with 19 physical tasks. Logistic regression with adjustment for covariates was conducted. The prevalence of HF in 27,185 adults aged ≥ 50 years was 6.37%. After controlling for demographics and smoking, logistic regression showed that HF was associated with 2.8 to 3.4 times increased odds of all domains of disability compared to adults without HF, but with additional adjustments of covariates, the association was attenuated indicating the mediating effects of covariates. The future study may examine the mediating effects of covariates when intervening difficulties with lower extremity mobility and activities of daily living while considering in community-dwelling older adults with HF.
Clinical Characteristics, Pathology and Outcome of 237 Patients With Synovial Sarcoma: Single Center Experience
Authors: Cheng Hao , Yihebali Chi , Zhang Hongtu , Guo Lei , Shi Susheng
Published: December 2021

Background. Synovial sarcoma (SS) is a rare soft tissue sarcoma. Available data regarding survival outcomes of patients with SS still remains limited. In this study, a single center retrospective analysis was performed to investigate the clinical characteristics, pathology and survival outcomes in patients with SS in China. Methods. Patient data were systematically reviewed at the National Cancer Center from January 2015 to December 2020. The general information and treatment condition of patients were collected. Overall survival (OS) was evaluated using the Kaplan-Meier and Cox regression method. Results. A total of 237 consecutive patients were included in this study (follow-up cut-off date: December, 2020). The median age of patients involved was 35 years (ranging from 5 to 83 years) and the mean tumor diameter was 5.3 cm (ranging from .2 to 26.0 cm). The main findings of the immunohistochemical staining analyses were EMA (111/156) (71%), keratin 7 (32/64) (50.0%), keratin 8/18 (12/20) (60%), keratin 19 (42/70) (60%), S-100 (18/160) (11%), BCL2 (128/134) (96%), CD99 (137/148) (93%) and TLE1 (23/26) (88%). It was found that 109 patients (66%) were presented with monophasic subtype and 55 (34%) with biphasic subtype. A total of 137 patients were tested by FISH method and 119 patients (87%) demonstrated SS18 rearrangement, whereas 18 patients (13%) did not show SS18 rearrangement. Generally, it was found that the 3-year OS rate was 86% and the 3-year DFS was 55%. Results of univariate analysis revealed that age, tumor size, tumor site, radiotherapy and targeted therapy were significantly correlated with the overall survival ( P < .05). Further, multivariate Cox regression analysis revealed that age, tumor size and radiotherapy were significantly associated with OS ( P < .05). Conclusions. In conclusion, this study shows that the outcomes of patients with SS significantly decrease with age and tumor size. It was evident that radiotherapy is an independent and positive prognostic factor for patients with SS. In addition, it was shown that the prognosis of SS varies with tumor location. For instance, primary tumors in lower extremities have a higher prognosis, whereas tumors located in thorax have a lower prognosis.
Timing Market Entry: The Mediation Effect of Market Potential
Authors: Islam Towhidul , Meade Nigel , Sood Ashish
Published: December 2021

Timing a multinational firm's entry into a new country is a pivotal decision with long-term impact on the firm's overall performance; thus, a deeper understanding of the drivers of the decision and their interrelationship can yield significant managerial benefits. The authors explore the mediating role of market potential by decomposing the total effects of the decision's main drivers—macroeconomic attractiveness, market concentration, social heterogeneity, and population density—into direct and indirect effects. These decompositions explain the countervailing effects of some drivers that simultaneously make both positive and negative impacts. The data set encompasses mobile 4G broadband penetration in 130 countries, including market entry timings for 28 international operators in 79 countries. The authors establish the nature of the mediation effect of market potential on the drivers of entry timing. Using early penetration data, they utilize growth mixture modeling to divide the countries into four latent segments. They validate this segmentation using machine learning with the four key drivers as classifiers; the process establishes macroeconomic attractiveness as the predominant classifier. The analysis offers entry-timing guidance at both pre- and postlaunch stages.
Investigating the Multidimensionality and Psychometric Properties of the Children’s Anger Rumination Scale (CARS): A Bifactor Exploratory Structural Equation Modeling Framework
Authors: Spyropoulou Elli , Giovazolias Theodoros
Published: December 2021

Anger Rumination (AR) represents a maladaptive cognitive process that contributes negatively to psychosocial functioning. The purpose of the present study was to investigate the psychometric properties (e.g., factorial structure, measurement invariance, and reliability) of the Children’s Anger Rumination Scale (CARS). Factorial structure was tested by contrasting alternative model representations of the instrument (one- and four-factor independent cluster models–confirmatory factor analysis [ICM-CFA], exploratory structural equation modelling [ESEM], bifactor-CFA and bifactor-ESEM) in a convenience sample of 552 Greek students ( Mage = 11.50 years; 53.6% girls). The hypothesized bifactor-ESEM solution, composed by a general anger rumination factor and four specific factors (Angry Afterthoughts, Thoughts of Revenge, Angry Memories, and Understanding of Causes) provided the best fit to the data and revealed the unitary dimensionality of the CARS. Measurement invariance across gender and age in level of the latent means indicated no significant differences in relation to AR tendency. The CARS showed internal consistency, one-month test–retest reliability as well as desirable patterns of convergent and discriminant validity. The predictive power of the instrument was also supported as participants’ AR propensity was found to explain both depressive symptoms and bullying behaviors. Overall, our findings indicate that the CARS is a developmentally appropriate and psychometrically sound instrument that conceptualizes AR as an unidimensional construct among children and preadolescents.
Vibration transmissions and predictions within low-rise buildings above throat area in the metro depot
Authors: Tao Ziyu , Zou Chao , Wang Yimin , Wu Jie
Published: December 2021

Train-induced feelable vibrations can bring side effects to people living or working in the building, as well as to operation of precise equipment. As massive construction of over-track buildings above metro depots prevails in megacities, impacts from train-induced feelable vibration take more concern. Four standard-designed 4-story steel-framed offices above the throat area in the Qianhai metro depot in Shenzhen, China, are studied in this research.

The field measurements were conducted to investigate the influences of track alignment and track location in the throat area on vibration responses of over-track buildings. Detailed vibration analyses using the finite element method have been conducted. Train-induced floor vibration assessments on human comfort are carried out based on a total of 54 train pass-bys operated in the morning and evening and on different tracks.

It can be found that the track alignment primarily affected the higher frequency components of train-induced vibrations, where curved trackinduced vibrations have larger amplitudes. The variance of train-induced building vibrations among pass-bys on different track locations was reduced compared with that of ground vibrations because of the averaging effects caused by multiple transmitting paths within the massive platform and stiff transfer structures. Train-induced acceleration levels at mid-floor can be 20–25 dB larger than those near columns at floor resonance frequencies which are dependent on the structural design.

This research gives a comprehensive insight into train-induced vibrations within low-rise steel-framed buildings above the throat area in the metro depot, which is a valuable reference for assessments before the construction of future similar over-track communities.
Maltreatment in Childhood and Perceived Partner Responsiveness in Adult Romantic Relationships: A Dyadic Daily Diary and Longitudinal Study
Authors: Vaillancourt-Morel Marie-Pier , Rosen Natalie O. , Péloquin Katherine , Bergeron Sophie
Published: December 2021

This study examined the associations between childhood maltreatment (CM) and the mean-level of perceived partner responsiveness (PPR; the extent to which individuals feel cared for, understood, and validated by their partner) over 35 days, the day-to-day variability in PPR, and the initial levels and trajectories of PPR over 1 year in community couples. Both members of 228 couples completed a self-reported measure of CM and provided daily reports of PPR over 35 days and retrospective reports of PPR at three time points over 1 year. A person’s greater CM was related to a lower mean level of PPR over 35 days and to a lower initial level of their own PPR. A person’s sexual abuse, physical neglect, and emotional neglect had an effect over and above other forms of CM in these associations. A person’s greater CM was also related to higher day-to-day variability in their own and their partner’s PPR, and a person’s greater emotional neglect was associated with a sharper decrease over time in their own PPR. These findings provide a more fine-grained understanding of how CM may affect the perceptions of being cared about, accepted, and validated by a partner on a daily basis and over time.
Association Between Intimate Partner Violence and Depressive Symptoms among Women Aged 15 to 45 Years in Peru: A Three-Year Analysis of the Demographic and Health Survey
Authors: Silva-Burga Alejandro , Al-kassab-Córdova Ali , Maguina Jorge L.
Published: December 2021

We conducted a secondary data analysis based on the 2014, 2015, and 2016 Demographic and Health Surveys to determine the association between intimate partner violence (IPV) and depressive symptoms in Peruvian women aged 15–45 years. Depressive symptoms were assessed through the PHQ-9, while IPV was assessed through the CTS-2. A total of 24,099 subjects were included. The prevalence of depressive symptoms and IPV was 6.98% and 64.72%, respectively. Victims of IPV were 2.47 times more likely to have depressive symptoms compared to those who were never assaulted. In conclusion, there is a strong association between IPV and depressive symptoms.
School Segregation in the Era of Color-Blind Jurisprudence and School Choice
Authors: Clotfelter Charles T. , Hemelt Steven W. , Ladd Helen F. , Turaeva Mavzuna R.
Published: December 2021

The decades-long resistance to federally imposed school desegregation entered a new phase at the turn of the new century. At that time, federal courts stopped pushing racial balance as a remedy for past segregation and adopted in its place a color-blind approach to evaluating school district assignment plans. Using data that span 1998 to 2016 from North Carolina, one of the first states to come under this color-blind dictum, we examine the ways in which households and policymakers took actions that had the effect of reducing the amount of interracial contact in K-12 schools within counties. We divide these reductions in interracial contact into portions due to the private school and charter school sectors, the existence of multiple school districts, and racial disparities between schools within districts and sectors. For most counties, the last of these proves to be the biggest, though in some counties private schools, charter schools, or multiple districts played a deciding role. In addition, we decompose segregation in the state's 11 metropolitan areas, finding that more than half can be attributed to racial disparities inside school districts. We also measure segregation by economic status, finding that it, like racial segregation, increased in the largest urban counties, but elsewhere changed little over the period.
Using Emerging Hot Spot Analysis to Explore Spatiotemporal Patterns of Housing Vacancy in Ohio Metropolitan Statistical Areas
Authors: Morckel Victoria , Durst Noah
Published: December 2021

We highlight the use of a newer method—emerging hot spot analysis of space-time cubes from defined locations—for examining the spread of housing vacancy in large Ohio MSAs. Using this method, we discovered that many Ohio MSAs concurrently experienced spread, contraction, and vacancy stabilization in census tracts located adjacent to, or within close proximity of, one another. These results indicate that vacancy proliferation is not solely a matter of geographic determinism, whereby high vacancy in one tract predicts high vacancy in neighboring tracts in future years. We also found that vacancy spread at the tract level is associated with population dynamics at the neighborhood, city, and MSA levels. Our findings suggest that vacancy reduction initiatives should account for population trends at various geographic scales, not just physical conditions within a particular neighborhood or tract.
Using a Digital Meditation Application to Mitigate Anxiety and Sleep Problems in Children with ADHD
Authors: Fried Ronna , DiSalvo Maura , Farrell Abigail , Biederman Joseph
Published: December 2021

Objective: ADHD affects 11% of children in the United States and is associated with significant levels of anxiety. Although the literature supports mindfulness-based interventions as a promising strategy for managing anxiety, it falls short in the feasibility of digital mindfulness interventions. Method: This study investigated the usefulness of the pediatric version of Headspace, a digital mindfulness program, for reducing stress in 18 children with ADHD. We conducted a 4-week pilot study to evaluate the Headspace digital mindfulness application for children ages 6 to 12 with ADHD. Parents completed the Beck Anxiety Inventory and the Children’s Sleep Habits Questionnaire at baseline and endpoint. Results: Participants had an average age of 9.2 years and were 78% male. The Headspace intervention significantly reduced anxiety and sleep problems in children with ADHD. Conclusion: Children with ADHD and comorbid anxiety and/or sleep problems could benefit from a digitally based meditation application. (J. of Att. Dis. XXXX; XX(X) XX-XX)
Ethnic-Racial Identity as a Source of Resilience and Resistance in the Context of Racism and Xenophobia
Authors: Rivas-Drake Deborah , Pinetta Bernardette J. , Juang Linda P. , Agi Abunya
Published: December 2021

How youth come to understand their social identities and their relation to others’ identities can have important implications for the future of our society. In this article, we focus on how ethnic-racial identities (ERI) can serve to promote (or hinder) collective well-being. We first describe the nature of change in ethnic-racial identities over the course of childhood and adolescence. We then delineate three pathways by which youths’ ERI can be a mechanism for productive intergroup relations and thereby collective well-being as a: (a) basis for understanding differences and finding commonalities across groups; (b) promotive and protective resource for marginalized youth; and (c) springboard for recognizing and disrupting marginalization. This article concludes with how youths’ ERI can be nurtured into a source of resilience and resistance in the face of racism and xenophobia. Moreover, we urge researchers to consider the role ERI plays in guiding youth to challenge and resist marginalization.