bluuebunny/crossref_metadata_2025 huggingface dataset:
Fear of Heterosexism Among Sexuality and Gender Diverse Staff and Students
Authors: Brady Brooke , Asquith Nicole L. , Ferfolja Tania , Hanckel Benjamin
Published: June 2020

Fear of heterosexism—as distinct from actual experiences of heterosexism—plays a significant role in staff and students lives on campus. Ambient workplace heterosexism provides a context for staff and students about what to expect from their peers and colleagues, and shapes the daily activities of those who perceive heterosexism as a regulating force. In this article, we consider the psychometrics of the Fear of Heterosexism Scale ( FoHS), which was integrated into a campus climate survey of Western Sydney University staff and students ( N = 3,106; n = 412). This scale was considered in relation to a range of associated factors, including perceived safety on campus, bystander efficacy, responsibility to intervene, and awareness of lesbian, gay, bisexual, transgender, intersex, queer/questioning, asexual, and many other terms such as nonbinary and pansexual (LGBTIQA+) issues. In turn, the results of the FoHS are considered across a range of demographic factors such as gender, sexuality, role, dis/ability, and membership of campus-based support organizations. Supporting the findings from the initial operationalization of the FoHS by Fox and Asquith in 2018, this research identifies the consequences of fear of heterosexism on daily activities and engagement with study/work. Understanding the factors associated with fear of heterosexism is critical in creating more inclusive and respectful university environments.
Contesting Working-Class Politics in Turkey: Social Transformations, Islam, and the Left
Authors: Bekmen Ahmet , Öngel Ferit Serkan , Hadiz Vedi R.
Published: June 2020

This article examines transition in Kocaeli, an industrial city in the north-western part of Turkey, away from left-wing politics and trade unionism in the early 1970s, and toward Islamic politics from the mid-1990s onwards. It does do by investigating the ideological, political, and social transformation of the working class. Based on fieldwork involving in-depth, semistructured interviews conducted with current and former workers and trade union leaders, the article analyzes the various aspects of, and limits to, the hegemonic relationships between workers and left-wing politics on the one hand, and with Islamic politics, on the other.
Faith Community Nursing Practice and Holistic Nursing Practice: A Comprehensive and Inclusive Comparison of Both Specialties
Authors: Sessanna Loralee , Askew Yvonne D. , Pomeroy Sherry H.
Published: June 2020

Faith community nursing and holistic nursing are recognized by the American Nurses Association as nursing specialties. Both nursing specialties practice with the understanding that holistically caring for an individual as a unique whole in his or her totality including respecting and attending to a human being’s spiritual and/or faith-based needs across the life span is integral in promoting health and healing. The purpose of this article is to present the evolution of faith community nursing and holistic nursing practice and to compare their similarities and differences based on each specialty’s current Scope and Standards of Practice. Utilizing each specialty’s Scope and Standards of Practice allowed the authors a fair, practical, and extensive means for presenting a comprehensive and inclusive comparison. Continued and partnered research should be conducted by both specialties to advance their scope and standards of practice, to support comprehensive evidence-based and outcome-based care that promotes health, healing, compassion and caring, and to educate others regarding each nursing specialty’s role, value, and significant contributions to the art and science of nursing.
Theoretical investigations into magnetorheological finishing of external cylindrical surfaces for improved performance
Authors: Singh Manpreet , Singh Anant Kumar
Published: June 2020

Fine finishing entails increased percentage contact area, less friction, and less wear. The magnetorheological finishing is a precision process to obtain the fine finishing on the workpiece surface for improved functional applications. So, the rotary rectangular core-based magnetorheological finishing process is utilized for the precise finishing of the cylindrical external surfaces. The rotary-rectangular shaped tool core tip surface provides the uniformly magnetic flux concentration that further benefit to offer the uniform fine finishing on the cylindrical work-part's external surface. In this work, a theoretical model is developed to predict the reduction in the surface asperities during the magnetorheological finishing of the external cylindrical surfaces. The rotational speed of the rectangular tool core on the rotating cylindrical work-part enhances the relative speed of active abrasives, which decreases the pitch, helix angle, and increases the helical path length. These results enhance the uniform precise finishing on the cylindrical work-parts and also enhances the process performance. For validation of the theoretical roughness model, the experiments have been performed on the cylindrical external surface of the H13 die steel workpiece. The percentage error between the experimentally obtained Ra value and theoretical Ra value is found to be −4.76% to 3.06%, which shows the good agreement between the theoretical model and experimental results. It also shows the practicality and accuracy of the present process while finishing the H13 die steel and it is useful for many industrial applications.
Recent progress in flexibility effects on wing aerodynamics and acoustics
Authors: Prapamonthon Prasert , Yin Bo , Yang Guowei , Zhang Mohan , Lu Panpan
Published: June 2020

Since the theoretical aeroelasticity for flapping-wing aerodynamics was introduced in the 1920s, the effects of flexibility on aeroelasticity have been paid more attention to aerodynamic design. In recent years, the trait of the wing flexibility is applied for small-scale wings of biomimetic flyers including micro air vehicles and mini unmanned aerial vehicles. Until now, the aerodynamic performance and great agility of these flyers, which are beneficially used for military missions and other civilian applications, have been improved through surrogate flapping wings with the favorable effects of the flexibility. As per the aeroelasticity principle for the forward flying, the chordwise flexibility of an elastic flapping wing can generate thrust and lift redistributions, whereas the spanwise flexibility can result in variations of the angle of attack and the shift of phase along the wingspan direction. Consequently, all vortices generated by the flapping wing i.e. (1) leading-edge vortices, (2) tip vortices, and (3) trailing-edge vortices are blended supportively, thereby improving the aerodynamic performance and agility. Hence, the growth of research and development of the aerodynamic performance and agility for these flyers under the influence of flexible wings increases through experimental and computational studies dynamically and rapidly. This review aims to highlight the important role of the flexibility in the recent progress in wing aerodynamics of these flyers through several wing models done by famous groups of experts in this field. In addition, this review includes the acoustics of the wings under the flexibility effects which is considered as a new key for better flyer design and improvement. A comprehensive understanding of the integrated aerodynamics and acoustics under the wing flexibility is, therefore, needed.
Perpetual points in natural mechanical systems with viscous damping: A theorem and a remark
Authors: Georgiades Fotios
Published: June 2020

Perpetual points have been defined recently and their role in the dynamics of mechanical systems is ongoing research. In this article, the nature of perpetual points in natural dissipative mechanical systems with viscous damping, but excepting any externally applied load, is examined. In linear dissipative systems, a theorem and its inverse are proven stating that the perpetual points exist if the stiffness and damping matrices are positive semi-definite and they coincide with the rigid body motions. In nonlinear dissipative natural mechanical systems with viscous damping excepting any external load, the existence of perpetual points that are associated with rigid body motions is shown. Also, an additional type of perpetual points due to the added dissipation is shown that exists, and this type of perpetual points, at least in principle can be used for identification of dissipation in nonlinear mechanical systems. Further work is needed to understand the nature of this additional type of perpetual points. In all the examined examples the perpetual points when they exist, they are not just a few points, but they are forming manifolds in state space, the Perpetual Manifolds, and their geometric characteristics worth further investigation. The findings of this article are applied in all mechanical systems with no gyroscopic effects on their motion, e.g. cars, airplanes, trucks, rockets, robots, etc. and can be used as part of the elementary studies for basic design of all mechanical systems. This work paves the way for new design processes targeting stable rigid body motions eliminating any vibrations in mechanical systems.
Inverse kinematic procedures applied to underwater rescue transfer skirt mechanisms using altimeter sensors
Authors: Naeeni Iman Pishvaye , Fattahi Iman
Published: June 2020

One of the most complicated challenges in submarine rescue operations is how to effectively connect a disabled submarine to a rescue one. Articulated transfer skirt mechanisms are utilized as a means for simplifying the connection process between two submarines. The accuracy of kinematic procedures used for adjusting the mechanism is a substantial aspect of designing transfer skirts. This article commences with investigating forward kinematics of the transfer skirt. Afterwards, its inverse kinematics is taken into consideration using data provided by four altimeter sensors located on the skirt mouth. An appropriate algorithm is presented for the rotation required by both direction and angle skirts based on data obtained by altimeter sensors. Furthermore, a process is designed to obtain new set points if there exists errors in the control system of the skirt or for any changes in the orientation of disabled submarine or rescue submarine. Finally, the results are validated using CATIA DMU Kinematics.
Research on novel spatial structure of power generation of spherical robot
Authors: Zhai Yuyi , Ding Zihang , Liu Yunjia , Jin Shaohua , Kang Liang
Published: June 2020

Continuous energy supply is essential to spherical mobile robot in the Antarctic investigation. This paper puts forward energy harvesters that can generate electricity from the wind to achieve the long time and the long range exploration. The major contribution is to present the preliminary models of the energy harvester which uses the law of electromagnetic induction, and meanwhile the spatial structures about generating electricity are analyzed, and the influence of different structures on the power generation and efficiency will be obtained. In order to get the characteristics of power generation efficiency, this paper designs one element pipeline model and two element pipeline model, and then the motion of magnet in harvester will be simulated in different installed structures and wind speed. The varying rules of induced voltage are concluded at last. Finally, experiments are implemented based on the simulated model. The experimental results verify the dependability of different structural schemes of the robot and the validity of induced voltages’ varying rules. The results show that the induced electromotive force value obtained by the one element pipeline structure model is larger than the two element pipeline model, but the stability of the latter is better. Through the research in this paper, it can provide a basis for selecting a suitable spherical robot space structure according to the environmental conditions to improve the endurance.
Influence of air–water two-phase flow on the performance of a high-speed inducer
Authors: Cui Baoling , Cai Mingzhe , Li Yifan
Published: June 2020

This study is to reveal the influence of incoming flow containing air on the internal flow and performance of a high-speed inducer. Numerical calculations were performed herein under different air volume fraction conditions based on the shear-stress transport turbulence model and the Eulerian–Eulerian heterogeneous flow model. The external characteristic, cavitation performance and visualization experiment were conducted under the air–water two-phase condition. As a result, the effect of incoming flow containing air under small flow rate condition on the decline of the inducer head was larger than that under large flow rate condition. The proper air volume fraction was beneficial to the improvement of the inducer cavitation performance. As the air volume fraction increased, the pressure gradients in the axial and radial directions of the inducer gradually reduced and the supercharging performance of the inducer also worsened. The flow near the hub in the flow channel became messy, and the turbulence energy increased. The air mainly concentrated in the leading edge rim and the low blade height region near the hub in the flow channel. The air expanded in the circumferential, radial and axial direction as the air volume fraction increased.
An analytical method for determining the optimum number of blades of the compound impeller in a low specific speed centrifugal pump
Authors: Zhang Yu-Liang , Li Wen-Guang
Published: June 2020

Reasonable methods for determining the optimum number of blades in a low specific speed centrifugal pump with closed-type impeller with splitters, i.e. compound impeller have been rather rare in the literature so far. In the article, a new analytical method was put forward to determine such an optimum number of blades by including the effect of turbulent boundary layer over impeller blades. Three conventional impellers with different numbers of full-length blades and two compound impellers with different numbers of splitters were designed and manufactured. The corresponding performance tests were then conducted. Results showed that the optimum numbers of blades exist for two kinds of impeller in terms of head at design point, pump efficiencies at design point and best efficiency point, and slope of head-flow rate curve at shut-off point. The estimated optimum numbers of blades are in good agreement with the numbers based on the experiments. The conventional impellers with full-length blades are more prone to the hump phenomenon than the compound impellers at the optimum numbers of blades. For the compound impellers, however, the hump effect is negligible at the optimum number of blades, and their head and efficiency are higher than those for the impellers with full-length blades. The method is applicable to compound impeller design in low specific speed centrifugal pumps.
Acidophilic biodesulphurization of calcined pet coke and coal samples in iron and iron-free leaching media
Authors: Mishra Srabani , Panda Sandeep , Pradhan Nilotpala , Biswal SK , Satapathy D
Published: June 2020

Mineralogically distinct coal samples respond differently to microbial attack. In the present study, a mixed meso-acidophilic bacterial consortium predominantly comprising of Acidithiobacillus ferrooxidans strain was investigated for its biodesulphurization abilities for three distinct sulphur bearing samples (Goa CPC, Rajasthan Lignite, Assam Coal) of Indian origin in iron (9K+) and iron-free (9K−) media. A media devoid of Fe (II) iron was more effective for sulphur removal with maximum desulphurization of 45.19% for Assam coal followed by 36.8% for Rajasthan Lignite and 23.38% for CPC respectively. The proximate analysis, FTIR patterns and XRD analysis of the samples provided better insights into understanding the mineralogical and compositional changes in the coal matrix. Owing to the higher efficiency, Assam coal was additionally subjected to further optimization studies and characterization of the treated coal through TGA. The study indicated that the gross calorific values for all the samples increased following microbial treatment in 9K− media thereby providing a scope for further scale-up studies.
Effects of acupuncture on cardiovascular risks in patients with hypertension: a Korean cohort study
Authors: Jung Hyejin , Yeo Sujung , Lim Sabina
Published: June 2020

Objectives

The aim of this study was to investigate the effects of acupuncture on major adverse cardiovascular events (MACE), myocardial infarction, stroke and death in hypertensive patients taking anti-hypertensives.

Methods

Using the Korean National Health Insurance Service—National Sample Cohort (NHIS-NSC) database, this study identified 59,370 patients taking anti-hypertensives who had been diagnosed with hypertension between 2003 and 2006. They were divided into acupuncture and non-acupuncture groups. The follow-up period ended with the diagnosis of myocardial infarction, stroke or death. After propensity score matching (PSM), there were 18,011 patients each in the non-acupuncture and acupuncture groups. We calculated the incidence rate, hazard ratio (HR) and 95% confidence interval (CI) for MACE, myocardial infarction, stroke and death in patients with hypertension using a stratified Cox proportional hazard model. In addition, secondary outcome analyses for stroke and cardiovascular mortality were performed.

Results

After PSM, the HRs for MACE (0.83, 95% CI 0.80–0.86), all-cause mortality (0.73, 95% CI 0.70–0.76) and myocardial infarction (0.85, 95% CI 0.79–0.92) were significantly lower in the acupuncture group than in the non-acupuncture group. Moreover, the HRs for stroke-related mortality, hemorrhage stroke–related mortality, ischemic stroke–related mortality, ischemic heart disease–related mortality and circulatory system disease–related mortality were significantly lower in the acupuncture group than in the non-acupuncture group.

Conclusion

This observational study with long-term follow-up extends the evidence base in support of the effectiveness of acupuncture for the management of hypertension and potentially reduce the burden of cardiovascular disease.
A comparison of the effects of electroacupuncture versus transcutaneous electrical nerve stimulation for pain control in knee osteoarthritis: a Bayesian network meta-analysis of randomized controlled trials
Authors: Shi Xiaowei , Yu Wenjing , Zhang Wei , Wang Tong , Battulga Oyunerdene , Wang Lijuan , Guo Changqing
Published: June 2020

Background

To compare the effectiveness of electroacupuncture (EA) and transcutaneous electrical nerve stimulation (TENS) for pain control in knee osteoarthritis (KOA).

Methods

Four English (MEDLINE, EMBASE, Cochrane Library and Web of Science) and three Chinese (China Science Journal Citation Report (VIP), Wanfang and China National Knowledge Infrastructure (CNKI)) language databases were searched for eligible randomized controlled trials (RCTs), comparing four approaches: EA, TENS, medication and sham/placebo controls. The primary outcome was pain intensity, measured by visual analogue scale (VAS), numeric-rating scale (NRS) or Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scale. Classic pairwise and Bayesian network meta-analyses were conducted to integrate the treatment efficacy/effectiveness through direct and indirect evidence.

Results

Thirteen studies were included. In the direct meta-analyses, there was no statistically significant overall effect of EA (mean difference (MD) −4.77, 95% confidence interval (CI) −12.51 to 2.96), while the overall effects of high-frequency transcutaneous electrical nerve stimulation (H-TENS) (MD −16.63, 95% CI −24.57 to −8.69) and medication (MD −7.12, 95% CI −12.07 to −2.17) were statistically significant. In the network meta-analyses, the relative effect of the EA and H-TENS groups (MD 5.07, 95% CI −11.33 to 21.93) on pain control did not differ. Meanwhile, H-TENS demonstrated the highest probability of being the first best treatment, and EA had the second highest probability.

Conclusion

The present analysis indicated that both EA and TENS exert significant pain relieving effects in KOA. Among the four treatments, H-TENS was found to be the optimal treatment choice for the management of KOA pain in the short-term, and EA the second best treatment option. Given that the application of TENS is recommended by various international guidelines for the treatment of KOA, EA may also represent a potentially effective non-pharmacologic therapy.
Exploring traditional acupuncture point selection patterns for pain control: data mining of randomised controlled clinical trials
Authors: Hwang Ye-Chae , Lee In-Seon , Ryu Yeonhee , Lee Myeong Soo , Chae Younbyoung
Published: June 2020

Background

The underlying principles of traditional acupuncture point selection for pain control are complex. Analysis of acupuncture treatments from clinical studies may provide us with a potential rule when selecting traditional acupuncture points (hereafter abbreviated as “points”) in treatment protocols for pain control. The aim of this study was to investigate which points were most commonly used to treat pain in randomised controlled clinical trials (RCTs).

Methods

We searched acupuncture treatment regimens in RCTs included in the Cochrane Database of Systematic Reviews for pain management. We analysed information on point selection (more than 10 RCTs included) from seven eligible systematic reviews on pain control. The frequency of the points used was calculated and visualised using a human body template.

Results

The points most commonly used across diseases were SP6, ST36, LI4 and LR3. However, the most frequently used points varied across individual conditions. For example, the most frequently used points to treat migraine were GB20, LR3, GV20, Taiyang, LI4 and TE5, while the most frequently used points to manage dysmenorrhoea were SP6, CV4, SP8, LR3 and BL32. Both regional and distal points were used for pain management with acupuncture.

Conclusions

Our findings suggest that local and segmental/extra-segmental neuromodulation appear to be the most common phenomena for pain control in acupuncture research. Analysis of information on point selection using a data-driven approach may unveil the hidden patterns of traditional acupuncture point utilisation in clinical practice.
Hazard Pay for COVID-19? Yes, But It’s Not a Substitute for a Living Wage and Enforceable Worker Protections
Authors: Hecker Steven
Published: June 2020

The COVID-19 pandemic is exposing critical failures in public and occupational health in the United States. So-called hazard pay for essential workers is a necessary but insufficient response to the lack of workplace protections. The roots of these failures in the weakening of the Occupational Safety and Health Administration enforcement and pandemic preparedness and the dramatic shifts in the economy and labor market in recent decades are explored along with the history of hazard pay. The current prominence of COVID-19-related workplace hazards, and the mobilization by both nonunion and union workers experiencing them, presents opportunities amid the crisis and tragic losses to envision a revival of worker protection measures. Strategies are needed for organizing and legislative advocacy to address the disparate impact of both normal and crisis conditions on low-wage workers, especially women and workers of color.
The Curriculum Dilemma
Authors: Kaplan Sandra
Published: June 2020

This article describes four patterns for implementing a differentiated curriculum. The differentiation patterns include after completion of the basic curriculum, before the basic curriculum, with or in a parallel presentation of the basic or regular curriculum, and integrated within the standards.
Financial Vulnerability and Worker Well-Being: A Comparison of Long-Term Services and Supports Workers With Other Health Workers
Authors: Muench Ulrike , Jura Matthew , Spetz Joanne , Mathison Rachel , Herrington Charlene
Published: June 2020

Over 1.5 million new jobs need to be filled by 2026 for medical assistants, nursing aides, and home care aides, many of which will work in the long-term services and supports (LTSS) sector. Using 16 years of data from the American Time Use Survey, we examined the financial vulnerability of high-skill and low-skill LTSS workers in comparison with other health care workers, while providing insight into their well-being by measuring time spent on work and nonwork activities. We found that, regardless of skill status, working in LTSS was associated with lower wages and an increased likelihood of experiencing poverty compared with other health care workers. Results from time diary data indicated that the LTSS workforce spent a greater share of their time working and commuting to work. Low-skill LTSS workers were hardest hit, spending more time on paid and unpaid activities, such as household and child care responsibilities.
Afatinib for the treatment of EGFR mutation-positive NSCLC: A review of clinical findings
Authors: Harvey R Donald , Adams Val R , Beardslee Tyler , Medina Patrick
Published: June 2020

Epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors represent the standard of care in patients with EGFR mutation-positive ( EGFRm+) non-small cell lung cancer (NSCLC). The availability of several EGFR tyrosine kinase inhibitors approved for use in the first-line or later settings in NSCLC warrants an in-depth understanding of the pharmacological properties of, and clinical data supporting, these agents. The second-generation, irreversible ErbB-family blocker, afatinib, has been extensively studied in the context of EGFRm+ NSCLC. Results from the LUX-Lung 3 and 6 studies showed that afatinib was more active and better tolerated than chemotherapy in patients with tumors harboring EGFR mutations. Subanalysis of these trials, along with real-world data, indicates that afatinib is active in patients with certain uncommon EGFR mutations (S768I/G719X/L861Q) as well as common mutations (Del19/L858R), and in patients with active brain metastases. In LUX-Lung 7, a head-to-head phase IIb trial, afatinib improved progression-free survival and time-to-treatment failure versus the first-generation reversible EGFR tyrosine kinase inhibitor, gefitinib, albeit with a higher incidence of serious treatment-related adverse events. Nevertheless, afatinib is generally well tolerated, and adverse events are manageable through supportive care and a well-defined tolerability-guided dose adjustment scheme. In this review, we provide a detailed overview of the pharmacology, efficacy, and safety of afatinib, discuss treatment sequencing strategies following emergence of different resistance mechanisms, and shed light on the economic impact of afatinib. We also provide a comparison of afatinib with the available EGFR tyrosine kinase inhibitors and discuss its position within treatment strategies for patients with EGFRm+ NSCLC.
Analysis of non-skew and skew laminated composite and sandwich plates under hygro-thermo-mechanical conditions including transverse stress variations
Authors: Garg Aman , Chalak HD
Published: June 2020

A new fourth-order in-plane displacement field based refined higher-order zigzag theory is proposed for analysis of laminated sandwich plate (for both skew and non-skew shaped) subjected to hygro-thermal conditions. In order to predict behavior of thick laminated sandwich plates, third-order transverse displacement field is taken. Zig-zag effects are introduced using linear unit Heaviside step function. The theory satisfies zeros transverse normal and shear stress condition at the bottom and top surface of the plate along with continuity condition at interface. The proposed model is free from any kind of C-1 or penalty function requirements. Nine-noded isoparametric finite element having twelve degrees of freedom per node is used during analysis. Since, the present theory incorporates transverse displacement field along with continuity conditions, is able to predict the behavior of thick sandwich plates more efficiently. In literature no results are present for skew laminated composite and sandwich plates therefore, present results for skew plates are entirely new and will serve as benchmark for future studies.
Bending properties of textile reinforced concrete sandwich beams with gypsum and calcium silicate core
Authors: Gopinath Smitha , Gopal Ramesh , Lavanya E
Published: June 2020

Sandwich systems are gaining prominence because they offer thermal insulation in many building structures. There is a growing interest in better understanding the behavior of sandwich structures, as well as there is a need to monitor and predict the consequences of the limitations and weaknesses inherent in their design. The aim of this study is to evaluate the effect of two types of core materials on the bending properties of textile reinforced concrete (TRC) sandwich beams. In TRC, bi-directional glass textiles were used as reinforcement along with fine grained cementitious binder. TRC sandwich beam consisted of gypsum or calcium silicate panels with different density as core and TRC as skins. The stress transfer between skin and core was attained using adhesive tension without the use of mechanical anchors or adhesives. The bending properties of TRC sandwich beams including the effect of number of layers of textile in the TRC skins and independent behavior of core materials were investigated using three-point bending test. The properties such as flexural strength, toughness and residual strength have been evaluated for all specimens. Feasibility of using ASTM guidelines has been explored in estimating the toughness of various TRC systems. The general outcomes of this investigation promise a good influence for the application of gypsum and calcium silicate as core material for sandwich structures.
Experimental investigation of the use of blind rivets in sandwich panels
Authors: Studziński Robert
Published: June 2020

The paper presents experimental studies of the use of blind rivets (one side connection/blind connection) in sandwich panels with polyisocyanurate foam core. The laboratory pull-out tests of the rivets from the panel facing involved two types of blind rivets (with three and four clamping arms), two types of the sandwich panel facing material (steel and laminate) and an occurrence or lack of a primer layer, which is applied between the external facing and the polyisocyanurate foam during its emerging. As a result of the laboratory tests the mechanical characteristics of the varied types of the blind connections (the equilibrium load paths, the initial and the elastic stiffnesses, the elastic and the ultimate capacity, and the ductility) as well as the failure mechanisms were obtained. The provided research data was used to verify the finite element 3D model created in the Abaqus\CAE environment. This numerical model correctly predicts the results of laboratory tests in the elastic range of the mechanical response of the blind connection with steel facing.
Ultrasound-guided placement of peripherally inserted intravenous catheters increase catheter dwell time in children
Authors: Cottrell James Thomas , Chang Todd , Baird Jennifer , Barreras Joanna , Elkhunovich Marsha A
Published: June 2020

Objective:

To compare the dwell times of ultrasound-guided and non-ultrasound-guided short peripheral intravenous catheters in hospitalized children.

Methods:

This was a retrospective analysis of data from 256 ultrasound-guided and 287 traditional peripheral intravenous catheters placed in hospitalized children between 1 September2016 and 31 October 2016 at a free-standing children’s hospital with a 10-member vascular access team. A two-sample independent t test and Kaplan–Meier estimator were used to assess differences in dwell times between the ultrasound-guided peripheral intravenous catheters and non-ultrasound-guided peripheral intravenous catheters. Child age, peripheral intravenous catheter location, and subjective difficulty of placement were also analyzed.

Results:

There was a significant difference in mean hours of dwell time for ultrasound-guided versus non-ultrasound-guided peripheral intravenous catheters (96.06 vs 59.39, p < 0.001). Mean increase in dwell time was 36.68 h (95% CI: [24.14–49.22]). Median dwell times (50% probability of survival) for ultrasound-guided and non-ultrasound-guided peripheral intravenous catheters were 118 h (95% CI: [95–137]) and 71 h (95% CI: [61–79]), respectively. None of the additional covariates were significant predictors of dwell time.

Conclusion:

Peripheral intravenous catheters placed using ultrasound-guided methods had a significantly longer dwell time than those placed using non-ultrasound-guided methods in a cohort of hospitalized pediatric patients. This is in line with the findings in the adult literature and may suggest a need to increase the use of ultrasound-guided method for peripheral intravenous catheter placement in pediatric practice.
Tunnelled haemodialysis catheter insertion into the persistent left superior vena cava
Authors: Liberek Tomasz , Świąder Wojciech , Koprowski Andrzej , Baścik Bartosz , Dębska-Ślizień Alicja
Published: June 2020

Persistent left superior vena cava is an uncommon abnormality of the venous system. Most commonly, it is diagnosed incidentally during central vein catheterisation on the left side or pacemaker implantation. We present the case of a patient with persistent left superior vena cava, which was diagnosed after the attempted insertion of tunnelled haemodialysis catheter through the left internal jugular vein. The presence of the persistent left superior vena cava was confirmed by cardiac echography and angio–computed tomography scan. The 19-cm long tunnelled haemodialysis catheter was inserted into persistent left superior vena cava through the left internal jugular vein with good long-term function.
The Privatization of Health Care System in Saudi Arabia
Authors: Rahman Redwanur
Published: June 2020

Saudi Arabia’s Vision 2030 highlights the development of the health care sector through privatization. This study examines the factors that prompted the privatization of the health care sector in Saudi Arabia. This is a scoping review based on an extensive review of both published and unpublished documents. We have accessed different search engines and databases to collect various research publications, journal articles, government reports, policy and planning documents, and relevant press reports/articles. While privatization of the health care sector in Saudi Arabia has experienced an upward trend, the public health care sector remains vital to bring in overall improvements in the health of all sections of Saudi Arabia’s population. Keeping this in view, the government must strengthen its public health care sector to ensure affordable, accessible, and high-quality health care for all. This manuscript focuses on the policy aspect of the privatization of health care and is based on secondary research material. Increased privatization leads to rising expenses in health care, while adversely affecting equity and accountability in the provision of its services. Although this study is an independent analysis of Saudi Arabia’s health care system, lessons learned from this context could be used widely for policy-making in other countries with similar socioeconomic settings.
Tribological activity of ionic liquid stabilized calcium-doped ceria nanoparticles
Authors: Kumar Bharat , Verma Dinesh K , Kavita  , Rastogi Rashmi B
Published: June 2020

10% Calcium-doped ceria (CCO) nanoparticles have been synthesized by sol–gel method. Their surface has been modified by surfactants, sodium dodecyl sulfate and 1-decyl-3-methyl imidazolium bis(trifluoromethyl sulfonyl) imide to yield SCCO and IL-CCO respectively. Powder X-ray diffraction patterns of nanoparticles and surface modified nanoparticles are indicative of cubic phase of ceria. Fourier transform infrared spectra confirm the surface modification of nanoparticles, particularly with ionic liquid. Morphology of the as-prepared nanoparticles investigated by field emission scanning electron microscopy, transmission electron microscopy/high-resolution transmission electron microscopy reveals that there is decrease in size of nanoparticles from CCO followed by SCCO and then IL-CCO. Wrapping of nanoparticles by ionic liquid is apparent in the scanning electron microscopy (SEM) and transmission electron microscopic (TEM) images. The tribological activity of the well-characterized nanoparticles has been evaluated at the optimized concentration, 0.2% w/v in paraffin oil under ASTM D4172 and ASTM D5183 test conditions using a four-ball tester. Based on tribological parameters, mean wear scar diameter, average friction coefficient, load-carrying capacity, and loss of frictional power, their relative performance followed the order – IL-CCO > SCCO > CCO. Worn surface analysis by scanning electron microscopy/energy-dispersive X-ray spectroscopy, atomic force microscopy corroborated the tribological performance. The order of the activity could be correlated with the size of the nanoparticles. Moreover, lubricating properties of ionic liquid have been instrumental for the exalted activity of IL-CCO. The presence of heteroatoms of ionic liquid, nitrogen, oxygen, fluorine, sulfur along with calcium and cerium of nanoparticles in energy-dispersive X-ray (EDX) spectroscopy analysis of the wear scar surface lubricated with IL-CCO confirms the vital role of ionic liquid towards the tribological activity.
The effect of V-shape protruded and dimple textured on the load-carrying capacity and coefficient of friction of hydrodynamic journal bearing: A comparative numerical study
Authors: Sharma Sanjay , Sharma Aniket , Jamwal Gourav , Kumar Awasthi Rajeev
Published: June 2020

The present comparative numerical study is between V-shape protruded, dimple textured, and untextured bearing. The performance parameters in terms of the load-carrying capacity and coefficient of friction are computed by solving governing Reynold’s equation of the lubricant fluid flow. The governing equation is solved by the finite element method by assuming that the fluid is Newtonian and isoviscous in nature. The effect of eccentricity ratios, texture distribution, texture heights, and texture depths are considered for the analysis in both textured bearings. From simulated results, the load-carrying capacity and coefficient of friction is found to be maximum for protruded textured bearing in full textured region and first half-textured region respectively as compared to untextured bearings. Finally, optimal operating and geometrical parameters of textured bearing is obtained by computing performance enhancement ratio, which is the ratio of the load-carrying capacity to the coefficient of friction. The maximum value of the performance enhancement ratio is found for protruded and dimple textured bearing in full texturing and second half-region corresponding to the eccentricity ratio of 0.8 and 0.6 respectively at texture height and depth of 0.4.
Undergraduate students’ experiences with educational podcasts to learn about inclusive and integrated physical education
Authors: McNamara Scott WT , Haegele Justin A
Published: June 2020

Currently, there is a dearth of research that has examined how podcasts influence kinesiology students’ learning experience. More specifically, research is needed to better understand how different types of podcasts (e.g. open-access podcasts) influence students’ perceptions toward topics that are complex and contextual. One such complex topic that has particular meaning to the fields of physical education and adapted physical education is inclusion. As such, the purpose of this investigation was to explore the way in which listening to a podcast influences how undergraduate students understand inclusion and integration within a physical education setting. Written reflections were collected from 19 undergraduate students and focus group interviews were conducted with 14 undergraduate students. An interpretivist research paradigm was adopted, and a qualitative description approach was utilized to construct three interrelated themes. The first theme, ‘This podcast was very effective’, demonstrated that the participants had generally favorable views towards the effectiveness of the podcast. The second theme, ‘I really didn’t know the difference’, described how the podcast provided new information to the participants concerning inclusion and integration in a physical education setting. The third theme, ‘Creating an inclusive environment for children with disabilities will be a challenge’, portrays participants recognizing barriers to providing an inclusive environment, and whether questioning integrated settings are always the preferred setting. These findings suggest that open-access podcasts are a viable tool to teach complex issues to preservice physical educators.
Psychological care in low-resource settings for adolescents
Authors: Galagali Preeti M , Brooks Merrian J
Published: June 2020

Adolescents living in low-resource settings lack access to adequate psychological care. The barriers to mental health care in low- and middle-income countries (LMIC) include high disease burden, low allocation of resources, lack of national mental health policy and child and adolescent mental health (CAMH) professionals and services, poverty, illiteracy and poor availability of adolescent friendly health services. WHO has recommended a stepped task shifting approach to mental health care in LMIC. Training of non-mental health specialists like peers, teachers, community health workers, paediatricians and primary care physicians by CAMH and framing country-specific evidence-based national mental health policies are vital in overcoming barriers to psychological care in LMIC. Digital technology and telemedicine can be used in providing economical and accessible mental health care services to adolescents.
The role of growth mindset, self-efficacy and intrinsic value in self-regulated learning and English language learning achievements
Authors: Bai Barry , Wang Jing
Published: June 2020

This study examined the role of growth mindset, self-efficacy, and intrinsic value in self-regulated learning (SRL) and English language learning achievements in Hong Kong primary school students. A sample of 690 4th graders participated in the study. The findings suggest that the level of SRL strategy use (i.e. monitoring, effort regulation, and goal setting and planning) was driven by the students’ motivational beliefs (i.e. growth mindset, self-efficacy, and intrinsic value) in different ways. Monitoring and effort regulation, in turn, were significant contributors to the participants’ English language learning achievements, but goal setting and planning did not predict their English language learning achievements. The finding suggests that growth mindset was a stronger predictor of SRL than self-efficacy and intrinsic value. Implications for fostering adaptive motivational beliefs and SRL are discussed. Future research should consider the influence of the socio-cultural context on the relationships between motivational factors, SRL strategy use, and English language learning achievements.
Exploring an ESL teachers’ beliefs and practices of teaching literary texts: A case study in Hong Kong
Authors: Cheung Anisa , Hennebry-Leung Mairin
Published: June 2020

Although much has been written about the relationship between teachers’ beliefs and practices, research examining the role of emotions in the realm of teacher cognition remains limited. This article presents a case study investigating one English as a second language (ESL) teacher’s beliefs and practices about teaching literary texts, drawing on Zembylas’ three levels of teacher emotions (2002, 2005), i.e. intrapersonal, interpersonal and intergroup, as the conceptual framework. The ESL teacher’s beliefs and practices were investigated via open-ended interviews and lesson observations that explored her perceptions of teaching literary texts throughout one academic year. The findings point to the complexity of teacher practices which may converge or diverge with their beliefs. Various contextual factors were found to contribute to this complexity. The results highlight the need to situate the emotions of teachers beyond contextual factors and consider the dynamic nature of teacher cognition. The practical value of the study lies in its extension of the role of emotions in mediating teacher cognition.
Memory enhancements from active control of learning in children with autism spectrum disorder
Authors: Fantasia Valentina , Markant Douglas B. , Valeri Giovanni , Perri Nicholas , Ruggeri Azzurra
Published: June 2020

Previous research with typically developing children and adults shows that active control of the learning experience leads to enhanced episodic memory, as compared with conditions lacking this control. The present study investigates whether similar advantages can be found in children with autism spectrum disorder. In this study, 6–12-year-old autistic children ( N = 29) participated in a simple memory game on a touchscreen tablet, in which they were asked to remember 64 objects presented in four blocks of 16. In two of the blocks, children could decide the order and pacing of study (active condition), whereas in the other two blocks, they passively observed the active study decisions of a previous participant (yoked condition). We found that recognition memory was more accurate for objects studied in the active compared with the yoked condition, even after a week-long delay. The magnitude of the effect was comparable with that obtained in previous studies with typically developing children and adults, suggesting a robustness for the benefits of active learning that goes beyond what previously hypothesized, extending to special populations. We discuss how these findings may help develop pedagogical interventions that leverage the active learning approach to promote inclusive learning.

Lay abstract

Research with adults and typically developing children has shown that being able to actively control their learning experience, that is, to decide what to learn, when, and at what pace, can boost learning in a variety of contexts. In particular, previous research has shown a robust advantage of active control for episodic memory as compared with conditions lacking this control. In this article, we explore the potential of active control to improve learning of 6- to 12-year-old children diagnosed with autism spectrum disorder. We presented them with a simple memory game on a touchscreen tablet, in which children were asked to recall as many of the presented objects as possible. For half of the objects, children could decide the order and pacing of study (active condition); for the other half, they passively observed the study decisions of a previous participant (yoked condition). We found that recognition memory was more accurate when children could actively control the order, pace, and frequency of the study experience, even after a week-long delay. We discuss how teachers and educators might promote active learning approaches in educational and pedagogical applications to support inclusive learning.