bluuebunny/crossref_metadata_2025 huggingface dataset:
Relationship Between Family Functioning, Parents’ Psychosocial Factors, and Children’s Well-Being
Authors: Gaspar Tania , Gomez-Baya Diego , Trindade Joana S. , Botelho Guedes Fábio , Cerqueira Ana , de Matos Margarida G.
Published: July 2021

The main objective of this study is to explore the impact of the psychosocial factors (social support, resilience, and mental health) on the family functioning and on the parent’s perception of their children’s well-being. Participants were 1757 parents of children aged 6 to 16 years, 77.3% female ( N = 1359), and 22.7% male ( N = 398), aged between 20 and 80 years ( M = 41.61 and SD = 5.71). A path analyses model indicated that social support and resilience, which were positively associated, presented positive effects on parental mental health and on family functioning. No effect was observed on family functioning by parental mental health after including the effects by social support and resilience. Finally, this model pointed out that better family functioning, more social support, and more resilience skills were related to better child well-being. Implications to research and to prevention and psychological intervention in relation to parental skills and family functioning are presented in order to promote children well-being and healthy development.
Sibling Social Comparison in Mid- to Later Life: Links with Well-Being and Relationship Quality
Authors: Jensen Alexander C. , Apsley Hannah B. , Thackeray Laura E. , Shoaf Breanna T.
Published: July 2021

Social comparison processes between siblings play an important role in the ways siblings influence one another at younger ages, but to our knowledge, no studies have examined social comparison processes between siblings in mid- to later life. The current study examined (1) factors associated with the propensity for social comparisons with a sibling and (2) how social comparison is linked to well-being and sibling relationship quality. Data came from 491 adults from across the United States ( M age = 58.96, SD = 6.25; 68% female). Results indicated that adults who are the same sex as their sibling are more likely to engage in social comparison with their sibling. Additionally, an inclination for social comparison with a sibling was linked to more depressive symptoms, more sibling conflict, and greater sibling closeness. Overall, comparison with a sibling in adulthood may be linked to both positive and negative outcomes.
From First-Union Separation to Stepfamily in Italian Context: Building a Stepcouple Identity
Authors: Scotto di Luzio Silvia , Procentese Fortuna
Published: July 2021

The present work aimed to explore the building process of couple identity for stepcouples’ partners. Fifteen Italian women and fifteen Italian men, engaged in a new couple’s relationship after first-union separation or divorce, were interviewed. Semi-structured interviews were analyzed through a Grounded Theory approach . Results showed that the first-union separation experience plays an important role in the process of stepcouple identity building, as it influences the priorities in individual organization of life, qualities, and expectations about new relationships, the importance attributed to individual, couple, and family boundaries, and the choice of the new partner. New functional stepcouple relationships are characterized by a strong sense of shared projects and purposes. This generative dimension, clearly perceived by interviewees as a fundamental characteristic of stepcouple identity, is a resource, in spite of complexity and challenges of stepcouples’ life cycle.
Chimeric Mouse With Humanized Liver Is an Appropriate Animal Model to Investigate Mode of Action for Porphyria-Mediated Hepatocytotoxicity
Authors: Eguchi Ayumi , Fukunaga Satoki , Ogata Keiko , Kushida Masahiko , Asano Hiroyuki , Cohen Samuel M. , Sukata Tokuo
Published: July 2021

Porphyrinogenic compounds are known to induce porphyria-mediated hepatocellular injury and subsequent regenerative proliferation in rodents, ultimately leading to hepatocellular tumor induction. However, an appropriate in vivo experimental model to evaluate an effect of porphyrinogenic compounds on human liver has not been fully established. Recently, the chimeric mouse with humanized liver (PXB mice) became widely used as a humanized model in which human hepatocytes are transplanted. In the present study, we examined the utility of PXB mice as an in vivo experimental model to evaluate the key events of the porphyria-mediated cytotoxicity mode of action (MOA) in humans. The treatment of PXB mice with 5-aminolevulinic acid, a representative porphyrinogenic compound, for 28 days caused protoporphyrin IX accumulation, followed by hepatocyte necrosis, increased mitosis, and an increase in replicative DNA synthesis in human hepatocytes, indicative of cellular injury and regenerative proliferation, similar to findings in patients with porphyria or experimental porphyria models and corresponding to the key events of the MOA for porphyria-mediated hepatocellular carcinogenesis. We conclude that the PXB mouse is a useful model to evaluate the key events of the porphyria-mediated cytotoxicity MOA in humans and suggest the utility of PXB mice for clarifying the human relevancy of findings in mice.
Effects of a progressive resistance exercise program in patients with hand osteoarthritis: A randomized, controlled trial with a blinded assessor
Authors: Nery Michele , Natour Jamil , Jennings Fabio , Fernandes Artur da Rocha Corrêa , Souza Marcelo C , Jones Anamaria
Published: July 2021

Objective:

To assess the effectiveness of a progressive resistance strength program on pain, function and strength in hand osteoarthritis patients.

Design:

Randomized controlled trial.

Settings:

Outpatients, University Hospital.

Subjects:

Sixty hand osteoarthritis patients were randomly allocated to exercise group ( n = 30) or control group ( n = 30).

Intervention:

The exercise group performed a progressive resistance strength program for hand muscles over 12 weeks. Both groups had a single education session.

Main measures:

The primary outcome was pain intensity (numeric pain scale). The secondary outcomes were – AUSCAN Hand Osteoarthritis Index, Cochin Hand Functional Scale for function and grip and pinch strength. A blinded evaluator performed the evaluations at baseline, 6 and 12 weeks.

Results:

The mean age were 68.9 (8.8) and 64.7 (8.9) for control and exercise groups, respectively. No significant differences between-group was observed for pain after 12 weeks (mean difference between groups was −1.30 (−0.02 to 2.62) for dominant hand and −1.33 (0.01–2.65) for non-dominant hand at T12, with P = 0.085 and 0.295, respectively). Regarding secondary outcomes, statistically significant differences between groups were found in exercise group: AUSCAN index – total score ( P = 0.005), pain ( P = 0.006), function ( P = 0.047), and Cochin scale ( P = 0.042) with the following mean difference between groups: −9.9 (4.07–15.73), −3.26 (1.06–5.46), −5.03 (1.20–8.86), and −6.27 (0.18–12.36), respectively.

Conclusion:

No difference was observed for pain (numerical pain scale) after the progressive resistance exercise program performed, however in exercise group, an improvement was observed on secondary outcomes such as pain during activities and function for patients with hand osteoarthritis.

Level of evidence:

1b
The Role of For-Profit Firms in Disaster Management: A Typology
Authors: Arora Swapan Deep , Chakraborty Anirban
Published: July 2021

Contemporary existence presents a duality of sustained development and recurrent disasters. Whereas disaster studies have closely examined public policy and state initiative, the role of for-profits is under-explored. Stakeholder theory and its integration with marketing orientation provide a theoretical underpinning for understanding the behavior of firms across contingencies, including disasters. Accordingly, we traverse the range of actions that these market entities exhibit in aiding disaster management and develop a comprehensive typology. The current COVID-19 pandemic provides a context for illustrating the practical exemplar actions as mapped to the proposed typology. We add to theory by examining the role of marketing philosophy and for-profits in tackling disasters at multiple levels: from micro-aspects of maintaining relations with specific stakeholders to the macro-objective of building community resilience. Further, the proposed typology helps practice and research by highlighting the range of firms' responses contributing to disaster management and building community resilience.
Palestinian Poet-Singers: Celebration Under Israel’s Military Rule 1948–1966
Authors: Darweish Marwan , Robertson Craig
Published: July 2021

Research about Palestinians in Israel during the period of military rule from 1948 to 1966 describes them as acquiescent and primarily focuses on the mechanisms of control imposed by Israel. This article examines the role played by improvised sung poetry in Palestinian weddings and social gatherings during this period, and it assesses the contribution that this situated art form made to asserting this community’s agency. Ḥaddā’ (male) and Badāaʿa (female) poet-singers are considered as agents of cultural resilience, songs as tools and weddings as sites of resilience and resistance for Palestinians who lived under Israeli military rule. Folk poetry performed by Ḥaddā’ and Badāaʿa is identified as a form of cultural resilience and resistance rooted in Palestinians’ cultural heritage. The data signal the persistence of resilience, dignity and rootedness in the land and identity, as well as demonstrating the risks of such resilience and of resistance actions.
The effect of visual and auditory feedback on adult poor-pitch remediation
Authors: Berglin Jacob , Pfordresher Peter Q , Demorest Steven
Published: July 2021

Previous research has led to the hypothesis that poor-pitch singing is the result of a weakness in the auditory/vocal loop. The present study evaluated this hypothesis in a training paradigm that used visual feedback to augment potentially faulty auditory-vocal associations. Following pretest with the Seattle Singing Accuracy Protocol (SSAP), participants were randomly assigned to one of three 20-min training conditions: (1) visual feedback training with auditory doubling, in which participants could both see and hear real-time feedback showing the relationship between their sung pitch and the target, (2) auditory feedback training, where participants relied only on airborne auditory feedback from their own voice, and (3) control training which involved imitation of speech from a foreign language instruction recording. After training, the SSAP was administered again as a posttest measure. There was a general improvement from pretest to posttest across all groups. However, the effect of training was only significant for participants who received visual feedback training, with greater gains in visual training than either of the other conditions. This pattern of results was particularly pronounced for performance on 4-note melodies in the SSAP, in contrast to single pitch matching. Visual feedback may facilitate accuracy by substituting for inaccurate auditory-motor associations. The fact that training, even over a very short time-span, can have significant effects on singing underlines the importance of practice, and supports the hypothesis that singing is a learned skill that can benefit from experience and may not simply reflect an inherited talent.
Management of e-resources in academic libraries in Ghana: Copyright implications
Authors: Adu Theresa L , van der Walt Thomas B
Published: July 2021

This study investigated the copyright issues surrounding the management of e-resources in academic libraries in Ghana. Forty-seven library staff and head librarians from four academic libraries were engaged using questionnaires and qualitative interviews in a sequential mixed-methods approach to generate data for this study. The findings indicate that in all four institutions copyright issues arose with the provision of distance learning, online courses and e-reserves services. All the respondents stated that they or their colleagues had had faculty ask questions on copyright issues. However, the professional librarians indicated that the library was not consulted and the instructors for online courses or distance education programmes did not cooperate with librarians; rather, the department posting the materials made the decisions on copyright regarding the usage of digital resources for distance learning, online courses or e-reserves. This does not augur well for the management of copyright of e-resources in academic libraries in Ghana.
Do anti-platelet drugs improve duration of continuous renal replacement therapy? A retrospective cohort study in cardiac ICU patients
Authors: Gupta Vivek , Aslam Naved , Chhabra Shibba Takkar , Makkar Vikas , Mohan Bishav , Kapoor Samir , Singh Vikram Pal , Kumar Rajiv , Grover Suvir , Kaur Gurkirat , Sethi Suman , Kaur Simran , Goyal Abhishek , Singh Bhupinder , Singh Gurbhej , Ralhan Sarju , Wander Gurpreet Singh
Published: July 2021

Objective:

The objective of this study was to investigate the impact of anti-platelet drug/s on duration of continuous renal replacement therapy (CRRT) in those patients where anti-coagulants were not used due to certain contraindications and in cases where patients were on anti-platelet drugs and were given anti-coagulant during CRRT.

Method:

This single-center, retrospective cohort study was conducted using the medical records patients treated with CRRT in the cardiac ICU of the inpatient urban facility, located in North India. Data was collected from only those patients who received CRRT for the duration of at least 12 h. Patient’s in NAC group were not on any anti-platelet/s and did not receive anti-coagulant during CRRT. AC and AP group patients received anti-coagulant alone or were already on anti-platelet/s and did not receive anti-coagulant respectively while ACAP group patients were on anti-platelet drug/s and also received anti-coagulant during CRRT.

Result:

Patients in AC, AP, or ACAP group showed significantly ( p < 0.001) higher CRRT filter life compared to NAC group. The median CRRT filter life was significantly higher in the ACAP group compared to AC ( p < 0.05) and AP ( p < 0.001) groups.

Conclusion:

This study indicates that systemic anti-platelet therapy can provide additional support in critical patients undergoing CRRT even with or without anti-coagulant therapy. However, the increase in CRRT filter life was more profound in patients who were on anti-platelet/s and also received anti-coagulant drug/s during CRRT.
“Conversion Therapy” Experiences in Their Social Contexts: A Qualitative Study of Sexual Orientation and Gender Identity and Expression Change Efforts in Canada
Authors: Kinitz David J. , Goodyear Trevor , Dromer Elisabeth , Gesink Dionne , Ferlatte Olivier , Knight Rod , Salway Travis
Published: July 2021

Objective:

To describe in what forms, with whom, where, when, and why Canadians experience sexual orientation and gender identity and expression change efforts (SOGIECE).

Methods:

This qualitative study is grounded in a transformative paradigm. We conducted semi-structured interviews with a purposive sample of 22 adults recruited from across Canada who have experienced “conversion therapy.” Directed content analysis was used, employing deductive and inductive coding approaches, to synthesize the findings and address 5 policy-relevant questions.

Results:

What are SOGIECE? Formal and informal methods of SOGIECE were used, including pharmacologic interventions, denial of gender-affirming care, and coaching to repress sexual orientation and/or gender identity and expression. With whom did SOGIECE occur? Practitioners included religious leaders, licenced health-care professionals (e.g., psychiatrists and psychologists), peers, and family members. Where did SOGIECE occur? SOGIECE occurred in 3 predominant settings: faith-based, health care, and social life. When did SOGIECE occur? SOGIECE rarely occurred over a restricted time frame; often, SOGIECE began while participants were adolescents or young adults and continued multiple years under various forms. Others described SOGIECE as a context in which their life was embedded for many years. Why did people attend SOGIECE? Cisheteronormative social and religious expectations taught participants that being non-cisgender or non-heterosexual was incompatible with living a good and respectable life.

Conclusions:

SOGIECE are not a circumscribed set of practices. Our study shows that SOGIECE are a larger phenomenon that consists of intentional and explicit change efforts as well as heterosexual- and cisgender-dominant social norms expressed and enforced across a wide range of settings and circumstances. This study provides critical context to inform contemporary social and health policy responses to SOGIECE. Policies should account for the overt, covert, and insidious ways that SOGIECE operate in order to effectively promote safety, equity, and health for sexually diverse and gender-diverse people.
Gender Differences in Academic Efficacy across STEM Fields
Authors: Ashlock Jennifer , Stojnic Miodrag , Tufekci Zeynep
Published: July 2021

Cultural processes can reduce self-selection into math and science fields, but it remains unclear how confidence in computer science develops, where women are currently the least represented in STEM (science, technology, engineering, and mathematics). Few studies evaluate both computer skills and self-assessments of skill. In this paper, we evaluate gender differences in efficacy across three STEM fields using a data set of middle schoolers, a particularly consequential period for academic pathways. Even though girls and boys do not significantly differ in terms of math grades and have similar levels of computer skill, the gender gap in computer efficacy is twice as large as the gap for math. We offer support for disaggregation of STEM fields, so the unique meaning making around computing can be addressed.
Ketogenic Diet Therapy for Epilepsy Associated With Aicardi Syndrome
Authors: Sanchez Miguel A. Ramirez , Cervenka Mackenzie C. , Bessone Stacey K. , Kossoff Eric H.
Published: July 2021

Introduction:

Aicardi syndrome is a rare neurodevelopmental disorder associated with epilepsy in females. Ketogenic diet therapy represents a possible nonpharmacologic treatment in Aicardi syndrome patients.

Methods:

All patients with Aicardi syndrome seen at Johns Hopkins Hospital (Baltimore, MD) and Johns Hopkins All Children’s Hospital (St Petersburg, FL) treated with ketogenic diet therapy since 1994 were evaluated retrospectively.

Results:

Fifteen patients, ages 4 months to 34 years, were identified. Ten (67%) patients experienced a ≥50% seizure reduction after 3 months, with 3 (20%) having a ≥90% reduction. Only 1 patient was seizure-free for a short period of time. The number of drugs tried prior to ketogenic diet therapy initiation was correlated with ≥50% seizure reduction at 3 months, 5.8 vs 2.6 in responders versus nonresponders ( P = .01). In addition, the mean number of drugs actively received also correlated, 3.0 vs 1.2, P = .005. Ketogenic diet therapy was slightly more successful in those without infantile spasms, 78% vs 50%, P = .33.

Conclusion:

Ketogenic diet therapy was helpful in Aicardi syndrome, although seizure freedom was rare. It was especially helpful for those who were more drug-resistant and did not have infantile spasms at ketogenic diet therapy onset.
Constituting Intersectional Politics of Reinscription: Women Entrepreneurs’ Resistance Practices in China, Denmark, and the United States
Authors: Long Ziyu , Buzzanell Patrice M.
Published: July 2021

Guided by feminist politics of reinscription and intersectionality theory, this study theorized how women entrepreneurs from China, Denmark, and the United States depicted their situated struggles to resist simultaneous interlocking oppressions in everyday entrepreneuring based on 40 in-depth interviews. Participants described that they experienced inscription whereby multiple power asymmetries of gender, age, culture, race/ethnicity, and so on emerged and entangled to prescribe social scripts that constrained their entrepreneurial agencies. Simultaneously, participants engaged in reinscription to deconstruct intersectional controls and rework hegemonic scripts in situated entrepreneurial activities. They deployed three resistance strategies: recontextualizing their intersectionalities in different discursive contexts to legitimize and elevate their entrepreneur identities; reformulating their intersectionalities by invoking privileged positions to counterbalance marginalization; and re-envisioning by transcending their intersectional subordination to create opportunities for change. Instead of focusing on pre-existing and fixed power structures and identities in intersectional resistance-control processes, we demonstrate how intersectionalities are (re)constituted in situ through complex and fluid inscription-reinscription dynamics in women’s entrepreneurship.
It’s Not Just Sex: Relational Dynamics between Street-Based Sex Workers and Their Regular Customers
Authors: Oselin Sharon S , Hail-Jares Katie
Published: July 2021

Establishing regular customers is an integral aspect of any service industry since they can increase profits and referrals. Most research on regulars within sex work focuses on indoor, high-end workers, who cultivate them through relational work practices. Yet very little is known about whether street-based sex workers employ these same tactics or even seek out regulars. This article draws upon interviews with 36 street-based sex workers in Washington, DC, USA. Sex workers dedicate considerable time and effort in order to retain regulars via relational work, noting such customers offer greater economic stability and fewer risks. Relational work also has disadvantages, exacerbated by the illicit and illegal nature of this work. Street-based sex workers navigate boundary setting and slippage as a part of retaining or rejecting regular clients. These findings have implications for policies that can reduce harms for sex workers and enhance their protections.
Performance of carbide tools in high-speed dry turning iron-based superalloys
Authors: Tian Xianhua , Yan Kuicheng , Wang Zhi , Xie Fangwei , Liu Ya , Wang Lei , Chen Xiaoran , Yuan Junfeng , Liu Hao
Published: July 2021

Machining quality and productivity of superalloys are limited due to their poor machinability, and fewer studies have focused on the cutting of iron-based superalloys. In this study, the cutting performance of coated and uncoated carbide tools in high-speed dry turning iron-based superalloy GH2132 was investigated by performing a series of cutting experiments. The experimental results indicated that cutting temperature and cutting forces increased, while tool life decreased with the increase in the cutting speed from 30 to 100 m/min. Under relatively low cutting speeds, flank face wear was dominated by abrasion and adhesion, while rake face wear mainly involved built-up edge (BUE), built-up layer (BUL), adhesion, and breakage near the depth of cut. Under higher cutting speed, adhesion wear was more serious on the flank face, and peeling off of the coatings and substrate occurred on the rake face. Owing to the protective effect of (Ti, Al)N + TiN coating, the coated tools exhibited better wear resistance and thus longer tool life, in particular, under higher cutting speeds. Analysis of the tool wear gap in the horizontal direction indicates that better dimensional accuracy could be obtained when coated tools are used. In dry turning of GH2132 with carbide tools, a favorable surface finish could be obtained. The surface roughness roughly showed a tendency to first decrease and then increase with the increase in average flank wear. The coated tools should be avoided to machine GH2132 at higher cutting speed due to the poor surface finish.
Effects of countersunk hole geometry errors on the fatigue performance of CFRP bolted joints
Authors: Qin Xuda , Cao Xingfeng , Li Hao , Zhou Meng , Ge Ende , Li Yonghang
Published: July 2021

Due to good aerodynamic performance and reliability, countersunk bolt joint is one of the most commonly used connection methods for carbon fiber reinforced polymer (CFRP) components in the aircraft. However, the countersunk hole machining process is inevitably accompanied by geometric errors, which will directly affect the mechanical properties of the joint structure. This paper presents a numerical and experimental investigation on the effect of countersunk hole geometry errors on the fatigue performance of CFRP bolted joints. FE model of CFRP countersunk bolted joints with designed geometry errors are established, and the rationality of the FE analysis was verified by fatigue life and failure forms. The CFRP bolted structure failure mechanism under fatigue load and influence of hole-making geometry error (including countersunk fillets radius, countersunk depth, and countersunk angle) on the fatigue life are investigated. Based on the relationship between fatigue life and the geometry error, the corresponding tolerances for CFRP bolt joint countersunk hole are determined as well. The research results can provide a reference for establishing reasonable geometric accuracy requirements for CFRP joint hole machining.
Fatigue performance of surface ground and wire electrical discharge machined TiNi shape memory alloy
Authors: Beck Robert J , Aspinwall David K , Soo Sein Leung , Williams Paul , Perez Roberto
Published: July 2021

Fatigue performance is a major consideration for critical aerospace components. The influence of surface grinding and rough/finish wire electrical discharge machining (WEDM) on the high cycle fatigue performance of a binary Ti50.8-Ni49.2 shape memory alloy was assessed. The effect of machined workpiece surface integrity in terms of surface roughness and subsurface microhardness on the fatigue results was also evaluated, in addition to fractography analysis. Testing was performed using a tensile-tensile regime at an elevated temperature of 150°C with specimens in the austenitic phase. Ground samples showed the highest fatigue strength of 390 MPa at run-out of 1.2 × 107 cycles, while finish and rough WEDM specimens were 21% and 57% lower respectively, despite the finish WEDM surfaces having significantly lower roughness. This was likely due to the presence of tensile residual stresses following WEDM. All of the S-N curves however exhibited a relatively flat response with no clear indication of endurance limits. This implies that the different machining processes/conditions affected the fatigue strength of the material, but not the overall trend/shape of the fatigue curves.
Transient thermal analyses of an integrated brake rotor and wheel hub for heavy duty vehicles
Authors: Güleryüz İbrahim Can , Karadeniz Ziya Haktan
Published: July 2021

In this study, transient thermal analyses for a new integrated rotor and wheel hub concept are performed by consideration of convection, conduction and radiation effects. Test methods used for the characterization and certification purposes are constructed in a simulation environment and the effect of different ventilation vanes and rotor-hub arrangements on heat transfer mechanism is examined and the details are summarized for a reliable simulation process. Validated procedures are used to report a series of characterization and certification analyses, namely; CFD analyses including wheel assembly, cooldown analyses, R13 repeated stop fade and alpine hot descent analyses for current design and new integrated rotor and hub pair for alternative ventilation vane designs. The analyses are especially focused on predicting the cooling period and predicting maximum bearing temperatures for normal and excessive loading scenarios. To provide benchmark a commercial integrated rotor and hub pair used in heavy duty vehicles is also analysed. The average convective heat transfer coefficient and cooldown period of proposed integrated brake rotor are improved by 117.3% and 30.5% compared to the base design. The maximum wheel bearing temperature is decreased by 27.0% and by 27.1% for the proposed integrated brake rotor and wheel hub compared to the benchmark model, in accordance with the repeated stop and alpine hot descent analyses. In addition, the total weight reduction of 10 kg (15%) according to the base design is achieved.
Dynamic response analysis of the brake disc of a high-speed train with wheel flats
Authors: Wang Zhiwei , Mo Jiliang , Gebreyohanes Micheale Yihdego , Wang Kaiyun , Wang Junyong , Zhou Zhongrong
Published: July 2021

To study the vibration characteristics and stress state of brake discs during vehicle operations, a spatial trailer car-track coupled dynamics model was developed with the consideration of flexible brake disc. In the model, the components of a trailer car are considered as rigid bodies. Flexible models of the brake disc and wheelset were established using the finite element method. The trailer car-track coupled dynamics model is validated using experimental test results. The effects of wheelset flexible deformation on the dynamic properties of brake discs were investigated with the excitations of track irregularity and wheel flats. Furthermore, the brake disc was systematically evaluated and discussed under the condition of wheel flats in the coupled dynamics system. The results indicate that compared to rigid wheelsets with wheel flats, flexible wheelsets can cause the brake disc to vibrate more severely with higher stress. The severe vibration and high stress state of the brake disc could cause it to crack in the region near the bolts. The established dynamics model can be further developed and employed to assess the dynamics of the brake systems of high-speed trains.
A novel hybrid aircraft propulsion based on the DEA compressor—part B: Performance
Authors: Aryana Babak
Published: July 2021

This two-parts article introduces a novel hybrid propulsion system based on the DEA compressor. The system encompasses a Pulse Detonation TurboDEA as the master engine that supplies several full-electric ancillary thrusters called DEAThruster. The system, called the propulsion set, can be categorized as a distributed propulsion system based on the design mission and number of ancillary thrusters. Part B of this article explains the performance sizing of the propulsion set designed in part A. Evaluating the performance of the propulsion, computer programs are written for all major components of the both master engine and ancillary thruster. The intake, compressor, detonation process, diffusers, axial turbine, and exit nozzle are modeled under certain flight conditions, and their performances are revealed and analyzed. The flight conditions are considered from the static condition at the sea level up to flight Mach number 5 at an altitude of 20,000 m. The performance of the propulsion set is also compared with some aircraft propulsions modeled by similar studies in all important aspects.
High dynamic digital control for a hydraulic cylinder drive
Authors: Kogler Helmut
Published: July 2021

The control of hydraulic cylinders with digital hydraulic valves is often based on modulation principles like pulse-width modulation, pulse-code modulation, or pulse–frequency control. In many cases the dynamic drive performance using such control strategies is far below the natural dynamics of the system, since closed-loop controllers demand a certain phase margin for stability. However, some drive applications require a high dynamic response, which cannot be realized with common closed-loop concepts. In this article the design of a bang–bang feedforward control with regard to the dynamics of a hydraulic cylinder drive in accordance with the theory of optimal control is presented. The control achieves the maximum physical dynamic response and no remaining oscillations after the movement, which forms the basis of a high dynamic three-level position control for hydraulic drives. Furthermore, the influence of valve dynamics and pipe line dynamics with regard to the design of the digital valve control are considered by simulations.
Near infrared spectroscopy determination of chemical and sensory properties in tomato
Authors: Sun Dong , Cruz Jordi , Alcalà Manel , Romero del Castillo Roser , Sans Silvia , Casals Joan
Published: July 2021

Fast and massive characterization of quality attributes in tomatoes is a necessary step toward its improvement; for sensory attributes this process is time-consuming and very expensive, which causes its absence in routine phenotpying. We aimed to assess the feasibility of near infrared (NIR) spectroscopy as a fast and economical tool to predict both the chemical and sensory properties of tomatoes. We built partial least squares models from spectra recorded from tomato puree and juice in 53 genetically diverse varieties grown in two environments. Samples were divided in calibration (210 samples for chemical traits, 45 samples for sensory traits) and validation sets (60 and 10, respectively) using the Kennard Stone algorithm. Models from puree spectra gave validation r2 values higher than 0.97 for fructose, glucose, soluble solids content, and dry matter (relative standard error of prediction, RSEP% ranged 3.5–5.8), while r2 values for sensory properties were lower (ranging 0.702–0.917 for taste-related traits (RSEP%: 9.1–20.0), and 0.009–0.849 for texture related traits (RSEP%: 3.6–72.1)). For sensory traits such as explosiveness, juiciness, sweetness, acidity, taste intensity, aroma intensity, and mealiness, NIR spectroscopy is potentially useful for scanning large collections of samples to identify likely candidates to select for tomato quality.
“I Am Okay With It, But I Am Not Going to Do It”: The Exogenous Factors Influencing Non-Participation in Medical Assistance in Dying
Authors: Brown Janine , Goodridge Donna , Thorpe Lilian , Crizzle Alexander
Published: July 2021

Medical assistance in dying (MAID) processes are complex, shaped by legislated directives, and influenced by the discourse regarding its emergence as an end-of-life care option. Physicians and nurse practitioners (NPs) are essential in determining the patient’s eligibility and conducting MAID provisions. This research explored the exogenous factors influencing physicians’ and NPs’ non-participation in formal MAID processes. Using an interpretive description methodology, we interviewed 17 physicians and 18 NPs in Saskatchewan, Canada, who identified as non-participators in MAID. The non-participation factors were related to (a) the health care system they work within, (b) the communities where they live, (c) their current practice context, (d) how their participation choices were visible to others, (e) the risks of participation to themselves and others, (f) time factors, (g) the impact of participation on the patient’s family, and (h) patient–HCP relationship, and contextual factors. Practice considerations to support the evolving social contact of care were identified.
Parents' Well-Being and Emotion Regulation During Infancy: The Mediating Effects of Coping
Authors: Russell Beth S. , Adamsons Kari , Hutchison Morica , Francis Jimi
Published: July 2021

New parents' emotional experiences and coping strategies vary by individual and contextual factors such that the efficacy of a coping strategy might depend on their context and the control a person has over each stressor. This is particularly true during the transition to parenthood, when there are numerous stressors parents have limited control over (e.g., sleepless nights, infant distress, and irregular feeding routines). The current study examines the associations between new parents' ( n = 188; 53.23% fathers) perceived stress, mental well-being, coping strategies, and emotion regulation during the transition to parenthood through path analysis. Overall model fit was excellent and indicated that parents' perceived stress was negatively associated with mental well-being and active coping strategy usage, and positively associated with behavioral disengagement strategy usage and difficulties with emotion regulation. Interestingly, parents' mental well-being was positively associated with the use of both active coping and behavioral disengagement strategies (and had no direct association with emotion regulation). Finally, active coping was negatively associated, and behavioral disengagement was positively associated, with emotion regulation difficulties. Family therapists and other mental health practitioners could adjust assessment practices for new families, as the evidence presented calls for context-based assessments of adaptation and coping supports during the transition to parenthood.
How Patient-Centered Medical Homes Integrate Dental Services Into Primary Care: A Scoping Review
Authors: Gupta Avni , Akiya Kelley , Glickman Robert , Silver Diana , Pagán José A.
Published: July 2021

Integrated care delivery is at the core of patient-centered medical homes (PCMHs). The extent of integration of dental services in PCMHs for adults is largely unknown. We first identified dental–medical integrating processes from the literature and then conducted a scoping review using PRISMA guidelines to evaluate their implementation among PCMHs. Processes were categorized into workforce, information-sharing, evidence-based care, and measuring and monitoring. After screening, 16 articles describing 21 PCMHs fulfilled the inclusion criteria. Overall, the implementation of integrating processes was limited. Less than half of the PCMHs reported processes for information exchange across medical and dental teams, referral tracking, and standardized protocols for oral health assessments by medical providers. Results highlight significant gaps in current implementation of adult dental integration in PCMHs, despite an increasing policy-level recognition of and support for dental-medical integration in primary care. Understanding and addressing associated barriers is important to achieve comprehensive patient-centered primary care.
Prevalence and Correlates of Observed Sun Protection Behaviors Across Different Public Outdoor Settings in Melbourne, Australia
Authors: Haynes Ashleigh , Nathan Andrea , Maitland Clover , Dixon Helen , Nicholson Anna , Wakefield Melanie , Dobbinson Suzanne
Published: July 2021

Skin cancer prevention efforts in Australia have increasingly incorporated a focus on protection during incidental sun exposure. This complements the long-present messages promoting protection in high-risk settings and avoidance of acute intense bouts of sun exposure. Data from two waves of a cross-sectional direct observational survey was used to assess the prevalence and correlates of N = 12,083 adolescents’ and adults’ sun protection behavior (arm and leg cover, hat, sunglasses, and shade cover). Individuals were observed in public outdoor settings in Melbourne, Australia during peak ultraviolet (UV) times (11 a.m.–3 p.m.) on summer weekends. Settings included pools and beaches, parks and gardens, and for the first time in 2018, outdoor streets and cafés which may capture more incidental forms of sun exposure and represent another public setting where Australians commonly spend time outdoors. Females and older adults were consistently better protected than males and adolescents. Physical activity was strongly associated with low shade cover across settings. Weather was more strongly associated with sun protection at outdoor streets/cafes and parks/gardens than at pools/beaches but use of observed sun protection (particularly arm cover and covering hat) was low across settings. Continued public education about UV risk and its relation to weather and the seasons is needed to promote the routine use of multiple forms of sun protection during outdoor activities in peak UV times, especially among males and adolescents. Findings also highlight the importance of considering activity demands of public spaces in shade planning to optimize sun protection during outdoor activities in public spaces.
Subjective Well-Being, Critical Race Theory, and the Assessment of Measurement Invariance Across Racial Groups
Authors: Curtis Christopher A. , Hurley Landon , Farmer G. Lawrence
Published: July 2021

The present study explores how Black and White youth respond to measures of subjective well-being within the context of critical race theory (CRT). Three levels of measurement invariance (i.e., configural, metric and scalar) were examined for indicators of subjective well-being. We hypothesized that there would be limited measurement invariance across groups based on the premise established by CRT that youth of color experience and perceive life differently than their White peers, which was supported. The findings of this study demonstrate that the measures work as expected within groups, but there is a considerable lack of invariance across groups. This study also provides some evidence that racial/ethnic differences cannot be taken for granted when assessing SWB in youth.
Primordial Haptics, 1925–1935: Hands, Tools and the Psychotechnics of Prehistory
Authors: Stadler Max
Published: July 2021

‘Psychotechnics’, Weimar Germany’s science du jour, typically is framed as a symptom of ‘technological media’ – obscuring the persistent significance of ‘dexterity’, ‘skill’ and ‘manual labour’ at the time. More broadly, there is a tendency to construe ‘the haptic’ as predominantly a casualty of modernity: skilled hands replaced by conveyor belts; skilled hands defended by the rearguard actions of arts-and-crafts movements; skilled hands destroyed by industrialized warfare. Drawing on contemporary investigations into the ‘organ of touch’, this essay aims to complicate this picture by reconstructing the proto-ergonomic project of Friedrich Herig, a German engineer, amateur prehistorian and expert on craft labour who rose to distinction in the 1920s as a designer of ‘ideal’ hand tools. Herig’s eclectic sources of inspiration reveal that matters of ‘touch’, far from obsolete, were intimately bound up with matters of tools – their design, uses and putative origins – and thus, with matters of (manual) labour.
Surface Media: McLuhan, the Bauhaus and the Tactile Values of TV
Authors: Schmidgen Henning
Published: July 2021

Marshall McLuhan understood television (TV) as a tactile medium. This understanding implied what Bruno Latour might call a ‘symmetrical’ conception of tactility. According to McLuhan, not only human actors are endowed with the sense of touch. In addition, TV, digital computers and other ‘electric media’ use light beams and similar scanning techniques for ceaselessly ‘caressing the contours’ of their surroundings. This notion of tactility was crucially shaped by the holistic aesthetics of the early Bauhaus. To get at the specific features of the TV image, McLuhan relied on the writings of László Moholy-Nagy and Sigfried Giedion, in particular their use of photography for capturing and highlighting the ‘texture’ of surfaces. However, he hardly reflected the social and political factors that, in the age of electric media, contribute to the ‘symmetricization’ of touch.
Body weight perception outweighs body weight when predicting shame, criticism, depression and anxiety for lower BMI range and higher BMI range adults
Authors: Carter Alicia , Hoang Namphuong , Gilbert Paul , Kirby James N.
Published: July 2021

This study examined the relationship between body weight shame, self-criticism and mental health for individuals across body weight ranges. In total 1695 participants completed a series of online measures and we used Structural Equation Modelling, to assess for the relationship between weight, perceived weight, social rank (social comparison, body weight shame, submissiveness) self-criticism (inadequate and self-hatred) and anxious and depressive symptoms. Results indicated that perceived body weight is more important than actual body weight in predicting body weight shame. Importantly, individuals classified in higher BMI ranges rely more on the self-hatred form of self-criticism which significantly predicts anxious and depressive symptoms.
Panopticon, Inc.: Jeremy Bentham, contract management, and (neo)liberal penality
Authors: Weinreich Spencer J
Published: July 2021

This essay revisits Jeremy Bentham’s Panopticon, perhaps the foundational figure of the study of the prison, to recover a dimension of the project wholly omitted in Michel Foucault’s canonical reading in Discipline and Punish. Nowhere does Foucault mention Bentham’s insistence that the prison be run by a private contractor. With Bentham's penal theory characteristically derived from his account of human psychology, the contract and private profit are essential to the functioning of the Panopticon, because they align the jailer's duty with their self-interest. Bentham built profit and market imperatives into the fabric of the Panopticon, always envisioned as a place of economic production. The contract-Panopticon and its political economy are vital antecedents to the neoliberal penality theorized by Loïc Wacquant and Bernard E. Harcourt, even as they problematize the statism inherited from Foucault and the chronological implications of the prefix “neo.” Bentham was only the theorist of a marketization of governance pervasive in his own time and ever since, raising the question of whether punishment has ever been a purely state function.
Energy absorption characteristic of bionic lightweight protective structure with curved tubes under impact loading
Authors: Du Jianxun , Hao Peng , Xie Zhiqiang , Liu Mabao
Published: July 2021

Reinforcing and toughening materials with light quality in engineered structures remains a challenge. In the biological tissues of numerous animal and plant species, efficient strategies have evolved to construct structures that have excellent mechanical properties. As a kind of biological structure with high-strength fiber, beetle elytron not only provides protection function for beetles, but also makes beetles light enough to obtain good flight ability. Because of these advantages of inner fibrous structure of elytron, the bionic investigation of beetle elytron has gradually become one of the research focuses in civil engineering and automobile anti-collision fields. In the present work, the honeycomb and tubes composed of fiber in the beetle elytra was analyzed, and a variety of bionic thin-walled honeycomb structures with curved hollow tubes were designed and modeled. The energy absorption ability of the bionic honeycomb structures with different types of tubes under impact loading were calculated by finite element software. The internal energy values and collapse processes of bionic structures were compared and analyzed at different crushing displacements. The parameter study, including wall thickness and impact angle, was carried out in the collapse time range from 0 ms to 8 ms. These results could be applied in developing crush-resistant materials in the field of automotive passive safety.
Parents for whom school ‘is not that big a deal’. Parental support in home schooling during lockdown in France
Authors: Delès Romain
Published: July 2021

The period of confinement in the spring of 2020 is of great interest in highlighting the parental work of educational support. While parental support is usually more diffuse, and is secondary in relation to what is done at school, occurring at different moments of daily life, home schooling during lockdown revealed new ways of helping and framing schoolwork. This article looks at parenting practices in higher socio-economic status (SES) families in France. Based on a massive questionnaire ( N = 31,764) and a series of additional interviews ( N = 15) conducted during lockdown, the aim is to investigate what makes parental assistance specific in high SES environments. Our findings show that such families have less difficulty carrying out schooling at home. What makes them consider this experience as ‘not a big deal’, as they say, is that they have organisational and pedagogical (i.e. objective) resources that enable them to respond to its challenges. In addition, however, we show that home schooling is experienced in these families as less contrived. In effect, they use schoolwork techniques that help to obscure (from others, but also from themselves) the effort that schoolwork requires.